Aplicações avançadas de tecnologia de extrusão de parafuso duplo Masterbatch e soluções abrangentes de processamento

1. Visão geral da indústria de masterbatch e conhecimento básico

1.1 Situação Atual e Tendência de Desenvolvimento da Indústria Masterbatch

Masterbatch, também conhecido como masterbatch de cores ou concentrado de cores, é um novo tipo de material de coloração plástica com alta concentração, alta dispersibilidade e uso conveniente. É feito dispersando uniformemente pigmentos ou corantes, transportadores e aditivos em uma proporção específica através de tecnologia profissional de mistura e granulação por extrusão. Comparado com o método tradicional de coloração direta (adição direta de pigmentos a matérias-primas plásticas), masterbatch tem as vantagens do uso conveniente, coloração uniforme, desempenho estável, proteção ambiental e economia de energia, que gradualmente substituiu o método de coloração tradicional e se tornou a principal solução de coloração na indústria de plásticos.

Nos últimos anos, impulsionado pelo rápido desenvolvimento de indústrias a jusante, como embalagens, automotivo, têxteis, eletrônica, construção e eletrodomésticos, o mercado global de masterbatch mostrou uma tendência de crescimento constante e rápido. De acordo com dados relevantes da indústria, o tamanho do mercado global de masterbatch excedeu 30 bilhões de dólares americanos, e espera-se que mantenha uma taxa composta de crescimento anual de 6%-8% nos próximos cinco anos. Entre eles, A Ásia-Pacífico é o maior mercado mundial de produção e consumo de masterbatch, contabilizando mais de 60% da participação no mercado global, principalmente devido ao rápido desenvolvimento da indústria de plásticos na China, Índia e outros países, a melhoria contínua da capacidade de apoio industrial, e a crescente demanda por produtos de alta qualidade, produtos masterbatch funcionais e ecologicamente corretos.

China, como o maior produtor e consumidor de masterbatch do mundo, tem uma grande demanda de mercado e uma cadeia industrial completa. A produção e o consumo anuais de masterbatch estão crescendo a uma taxa de dois dígitos, especialmente nas áreas de novos veículos energéticos, embalagem verde, têxteis de alta qualidade e dispositivos médicos, a demanda por masterbatch de alto desempenho (como masterbatch resistente a altas temperaturas, masterbatch retardador de chama, masterbatch de proteção ambiental) está mostrando uma tendência de crescimento explosivo. Com a melhoria contínua das políticas globais de proteção ambiental (como a proibição de pigmentos tóxicos e nocivos) e a melhoria da procura dos consumidores por produtos plásticos de alta qualidade, a indústria de masterbatch está gradualmente se desenvolvendo em direção a uma alta concentração, alta dispersibilidade, funcionalização, proteção ambiental e inteligência.

As principais tendências de desenvolvimento da indústria de masterbatch se refletem em quatro aspectos: primeiro, proteção ambiental e baixa toxicidade. Com o fortalecimento da consciência de proteção ambiental e o rigor das políticas de proteção ambiental, não tóxico, inofensivo, masterbatch de proteção ambiental pouco volátil e degradável se tornará a corrente principal do mercado, e pigmentos tóxicos e prejudiciais (como pigmentos de metais pesados) será gradualmente eliminado; segundo, funcionalização. Além de colorir, masterbatch também está se desenvolvendo em direção à integração funcional, como masterbatch retardador de chama, masterbatch antiestático, masterbatch antibacteriano, Masterbatch resistente a UV, que pode atender aos requisitos de uso especial de produtos a jusante; terceiro, alta concentração e alta dispersibilidade. Masterbatch de alta concentração pode reduzir a quantidade de adição, reduzir custos de produção, e alta dispersibilidade podem garantir coloração uniforme de produtos plásticos, evite manchas de cor e diferença de cor, qual é a chave para melhorar a qualidade do produto; quarto, inteligência e automação de processamento. O processamento de masterbatch requer controle rigoroso da uniformidade da mistura, temperatura e outros parâmetros. Inteligente, linhas de produção automáticas de extrusão de parafuso duplo se tornarão o mainstream, realizando monitoramento em tempo real, ajuste automático de parâmetros e produção em massa, melhorando a eficiência da produção e a consistência do produto.

Como o principal equipamento de processamento do masterbatch, extrusoras de rosca dupla desempenham um papel crucial no desenvolvimento da indústria de masterbatch. A mistura masterbatch tem requisitos rigorosos quanto ao efeito de mistura e dispersão, controle de temperatura e eficiência de produção de extrusoras. Série completa de extrusoras de Zhuoyue (HTS BÁSICO/PLUS/SUPER, ZTE, HTE) são especialmente projetados para processamento de masterbatch, com vantagens de desempenho direcionadas, que pode atender efetivamente às necessidades de processamento de diferentes tipos de masterbatch e ajudar os fabricantes a melhorar a qualidade do produto e a eficiência da produção.

1.2 Composição Central e Princípio de Funcionamento do Masterbatch

Masterbatch é composto por três elementos básicos: pigmentos ou corantes, transportadores e aditivos. A proporção e o desempenho de cada elemento determinam diretamente a qualidade e o efeito de uso do masterbatch. Compreender a composição central e o princípio de funcionamento do masterbatch é a base para dominar sua tecnologia de processamento e selecionar o equipamento de extrusão apropriado.

1.2.1 Pigmentos ou Corantes: O componente de coloração principal

Pigmentos ou corantes são os principais componentes que proporcionam desempenho de coloração ao masterbatch, contabilidade para 10%-80% da composição do masterbatch (a proporção específica depende do tipo de pigmento, requisitos de coloração e concentração de masterbatch). Os pigmentos são divididos em pigmentos orgânicos e pigmentos inorgânicos: pigmentos orgânicos têm cores brilhantes, alta força de tingimento, boa transparência, mas baixa resistência ao calor e resistência às intempéries, usado principalmente em plásticos de processamento de baixa temperatura (como PE, PP) e produtos com altos requisitos de cor (como têxteis, filmes de embalagem); pigmentos inorgânicos têm boa resistência ao calor, resistência às intempéries e estabilidade química, mas baixa força de tingimento e pouca transparência, usado principalmente em plásticos de processamento de alta temperatura (como plásticos de engenharia) e produtos ao ar livre (como materiais de construção, peças externas automotivas).

Os corantes são diferentes dos pigmentos. Os corantes têm boa solubilidade em matérias-primas plásticas, cores brilhantes e alta transparência, mas baixa resistência ao calor e resistência à luz, usado principalmente em produtos plásticos transparentes (como garrafas PET, Folhas de PC). A seleção de pigmentos ou corantes deve ser baseada no tipo de matéria-prima plástica (temperatura de processamento), ambiente de uso do produto (interior/exterior), requisitos de coloração (brilho da cor, transparência) e requisitos de proteção ambiental, para garantir que o masterbatch tenha desempenho de coloração estável e atenda aos requisitos de uso de produtos posteriores.

1.2.2 Operadoras: O componente de dispersão e adesão

Operadoras são a matriz do masterbatch, contabilidade para 10%-80% da composição do masterbatch, desempenhando principalmente o papel de dispersar pigmentos/corantes e aderir a matérias-primas plásticas. O transportador deve ter boa compatibilidade com pigmentos/corantes e com as matérias-primas plásticas alvo (as matérias-primas plásticas a serem coloridas), caso contrário, afetará a dispersibilidade dos pigmentos e o efeito de coloração dos produtos. Materiais de transporte comuns incluem polietileno (Educação Física), polipropileno (PP), cloreto de polivinila (PVC), poliamida (PA), tereftalato de polietileno (BICHO DE ESTIMAÇÃO), etc., que são selecionados de acordo com o tipo de matéria-prima plástica alvo: por exemplo, O transportador PE é usado para coloração de plástico PE, O transportador PP é usado para coloração de plástico PP, e o transportador PA é usado para coloração de plástico PA de engenharia.

O transportador também deve ter boa fluidez de processamento, que conduz à dispersão uniforme de pigmentos durante o processamento de extrusão e à mistura de masterbatch com matérias-primas plásticas alvo. Além disso, o ponto de fusão e a temperatura de processamento do transportador devem ser consistentes ou ligeiramente inferiores aos das matérias-primas plásticas alvo, para evitar a decomposição do transportador ou do plástico alvo durante o processamento.

1.2.3 Aditivos: O Componente Funcional Auxiliar

Aditivos são componentes auxiliares adicionados para melhorar o desempenho do processamento, dispersibilidade e desempenho de uso do masterbatch, contabilidade para 1%-10% da composição do masterbatch. O tipo e dosagem dos aditivos são determinados de acordo com o tipo de masterbatch e requisitos de processamento. Os aditivos comuns incluem:

• Dispersantes: O aditivo mais importante no masterbatch, o que pode reduzir a tensão superficial dos pigmentos, evitar aglomeração de pigmentos, e fazer pigmentos uniformemente dispersos no transportador. Dispersantes comuns incluem cera de polietileno, cera de polipropileno, ácido esteárico, estearato de cálcio, etc.. A adição de dispersantes pode melhorar significativamente a dispersibilidade do masterbatch, garantir coloração uniforme dos produtos, e reduzir o desgaste do equipamento de extrusão.
• Compatibilizantes: Usado para melhorar a compatibilidade entre pigmentos e transportadores, e entre masterbatch e matérias-primas plásticas alvo. Por exemplo, quando o transportador e o plástico alvo têm baixa compatibilidade (como transportador PE e plástico PA), compatibilizantes (como polietileno enxertado com anidrido maleico) pode ser adicionado para aumentar a força de ligação entre eles, evite a separação do masterbatch e do plástico alvo durante o processamento, and improve the mechanical properties of products.
• Estabilizadores de calor: Used to prevent the decomposition of pigments, carriers and target plastics during high-temperature extrusion processing. Common heat stabilizers include lead salts, calcium-zinc stabilizers, organic tin stabilizers, etc., which are selected according to the processing temperature and environmental protection requirements.
• Light Stabilizers and Antioxidants: Used to improve the weather resistance and aging resistance of masterbatch and colored plastic products, prevent the color fading and performance degradation of products under sunlight and oxygen, and extend the service life of products.
• Lubrificantes: Used to reduce the friction between materials and extrusion equipment (parafuso, barril, morrer cabeça), melhorar a fluidez do processamento, reduzir o consumo de energia, e evitar que o material grude no equipamento, o que é propício para o bom progresso do processamento de extrusão.

1.2.4 Princípio de funcionamento do Masterbatch

O princípio de funcionamento do masterbatch é baseado na dispersão uniforme de pigmentos de alta concentração no transportador. Durante o processamento de produtos plásticos, uma pequena quantidade de masterbatch (geralmente 1%-5%) é misturado com matérias-primas plásticas incolores. Sob a ação de alta temperatura e força de cisalhamento durante extrusão ou moldagem por injeção, o transportador do masterbatch derrete e se mistura com as matérias-primas plásticas alvo, e os pigmentos uniformemente dispersos são liberados e distribuídos uniformemente na matriz plástica alvo, alcançando assim o objetivo de colorir produtos plásticos. A chave deste processo é que os pigmentos no masterbatch devem ser dispersos uniformemente sem aglomeração, otherwise it will cause color spots, color difference and other defects in the colored products.

1.3 Common Classification of Masterbatch

Masterbatch can be divided into different types according to different classification standards, such as coloring type, carrier type, application field, functional type, etc.. The correct classification helps to better understand the performance characteristics and processing requirements of masterbatch, and select appropriate extrusion equipment and processing techniques.

1.3.1 Classification by Coloring Type

According to the type of coloring component, masterbatch can be divided into color masterbatch, white masterbatch and black masterbatch.

• Masterbatch de cores: The most common type of masterbatch, which uses organic or inorganic pigments of various colors (such as red, yellow, blue, green, orange) as coloring components, e é usado para colorir produtos plásticos de várias cores. A força do tingimento, o brilho da cor e a dispersibilidade do masterbatch de cores são os principais indicadores para medir sua qualidade.
• Masterbatch branco: Usando dióxido de titânio (TiO2) como principal componente de coloração, é usado para branquear produtos plásticos ou como cor base para masterbatch de cor clara. A brancura, o poder de cobertura e a dispersibilidade do masterbatch branco são os principais indicadores. O dióxido de titânio tem alta dureza, que possui altos requisitos de resistência ao desgaste de equipamentos de extrusão.
• Masterbat preto: Usando negro de fumo como principal componente de coloração, é usado para coloração preta de produtos plásticos. O negro de fumo tem boa resistência aos raios UV e às intempéries, e também pode melhorar as propriedades mecânicas dos produtos plásticos. The dispersibility of carbon black is the key to the quality of black masterbatch. Poor dispersibility will cause black spots and streaks in products.

1.3.2 Classification by Carrier Type

According to the type of carrier, masterbatch can be divided into PE masterbatch, PP masterbatch, PVC masterbatch, PA masterbatch, PET masterbatch, etc..

• PE Masterbatch: Using PE as the carrier, it is suitable for coloring PE plastic products (such as PE films, Tubos PE, PE injection molding parts). It has good compatibility with PE raw materials, good processing fluidity and uniform coloring.
• PP Masterbatch: Using PP as the carrier, it is suitable for coloring PP plastic products (such as PP fibers, PP injection molding parts, Folhas PP). It has good heat resistance and is suitable for high-temperature processing of PP.
• PVC Masterbatch: Using PVC as the carrier, é adequado para colorir produtos de plástico PVC (como tubos de PVC, Perfis de PVC, Filmes de PVC). Ele precisa ser combinado com estabilizadores de calor de PVC para evitar a decomposição do PVC durante o processamento.
• Masterbatch de plástico de engenharia: Usando plásticos de engenharia (PA, PC, PBT, etc.) como transportadoras, é adequado para colorir produtos plásticos de engenharia (como peças automotivas, componentes elétricos). Possui boa resistência ao calor e compatibilidade com plásticos de engenharia, e tem altos requisitos em equipamentos de processamento de extrusão.

1.3.3 Classificação por Campo de Aplicação

De acordo com o campo de aplicação do masterbatch, pode ser dividido em masterbatch de fibra, masterbatch de filme, masterbatch de moldagem por sopro, masterbatch de extrusão, masterbatch de moldagem por injeção, etc., que correspondem aos cinco principais campos de aplicação do masterbatch.

• Masterbatch de fibra: Usado para colorir fibras químicas (como fibra de poliéster, fibra de náilon), que é usado em tapetes, têxteis, almofadas e outros produtos. It requires high dispersibility and color fastness, and no color fading during spinning and weaving.
• Film Masterbatch: Used for coloring plastic films (such as shopping bags, casting films, multi-layer films), which requires high transparency and uniform coloring, and no color spots or streaks on the film surface.
• Blow Molding Masterbatch: Used for coloring blow molding products (such as medical and cosmetic containers, lubricating oil and paint containers), which requires good processing fluidity and uniform coloring, and no deformation or color difference of the container.
• Extrusion Masterbatch: Used for coloring extrusion products (such as sheets, tubos, fios e cabos), which requires good dimensional stability and uniform coloring, and no color difference on the product surface.
• Injection Molding Masterbatch: Used for coloring injection molding products (como peças automotivas, produtos eletrônicos, materiais de construção, home appliances, mobília, brinquedos), which requires high dispersibility and stable performance, and no color difference between batches of products.

1.3.4 Classification by Functional Type

According to the additional functions of masterbatch, it can be divided into ordinary masterbatch (only coloring function) and functional masterbatch (coloração + additional functions). Functional masterbatch is the development trend of the industry, and common types include flame-retardant masterbatch, masterbatch antiestático, masterbatch antibacteriano, Masterbatch resistente a UV, toughening masterbatch, etc.. Functional masterbatch requires adding corresponding functional additives on the basis of ordinary masterbatch, which has higher requirements on the mixing and dispersing effect of extrusion equipment.

2. Core Processing Technology of Masterbatch: Twin-Screw Extrusion Technology

Masterbatch processing mainly includes mixing, extrusão, resfriamento, granulation and other processes, among which twin-screw extrusion technology is the core technology of masterbatch mixing and granulation. Compared with single-screw extrusion technology, twin-screw extrusion technology has the advantages of strong mixing and dispersing capacity, controle preciso de temperatura, short residence time, high production efficiency and strong adaptability to raw materials, which can effectively solve the key problems of masterbatch processing (such as pigment agglomeration, uneven mixing, low production efficiency) and ensure the quality of masterbatch products.

Masterbatch mixing is one of the main applications of twin-screw extruders. The quality of masterbatch is directly determined by the performance of the twin-screw extruder and the rationality of the processing process. The key requirements of masterbatch processing for twin-screw extruders are: forte efeito de mistura e dispersão (para garantir dispersão uniforme de pigmentos), controle preciso de temperatura (para evitar a decomposição do pigmento e a degradação do transportador), força de cisalhamento apropriada (para quebrar aglomerados de pigmentos sem danificar as partículas de pigmento), alta eficiência de produção (para atender às necessidades de produção em massa) e boa resistência ao desgaste (para se adaptar ao desgaste de pigmentos de alta dureza, como dióxido de titânio e negro de fumo).

2.1 Dificuldades de processamento de masterbatch e requisitos para equipamentos de extrusão

Embora a tecnologia de extrusão de parafuso duplo seja adequada para processamento de masterbatch, devido à particularidade da composição do masterbatch (alto teor de pigmento, fácil aglomeração de pigmentos) e requisitos de processamento (dispersão uniforme, desempenho estável), ainda existem muitas dificuldades no processamento real. As principais dificuldades de processamento e requisitos correspondentes para equipamentos de extrusão são os seguintes:

2.1.1 Pigment Agglomeration and Poor Dispersibility

Pigments (especially inorganic pigments such as titanium dioxide and carbon black) have strong polarity and large specific surface area, which are easy to agglomerate into large particles during storage and mixing. If the agglomerates cannot be fully broken and dispersed during extrusion processing, the masterbatch will have poor dispersibility, and the colored plastic products will have color spots, color streaks and uneven coloring, which will seriously affect the product quality. This is the most common and key difficulty in masterbatch processing.

This requires the extrusion equipment to have strong mixing and dispersing capacity and appropriate shear force. The twin-screw extruder should adopt an intermeshing co-rotating structure, and the screw should be equipped with sufficient mixing elements and shearing elements to generate strong shear force and kneading force during rotation, which can fully break the pigment agglomerates and make the pigments uniformly dispersed in the carrier. Além disso, the screw speed and extrusion pressure should be adjustable to adapt to different types of pigments and masterbatch concentrations.

2.1.2 Pigment Decomposition and Carrier Degradation Caused by Overheating

Most pigments (especially organic pigments) have poor heat resistance, and the carrier (como PE, PP) also has a certain temperature resistance limit. If the extrusion temperature is too high or the residence time of the material in the extruder is too long, the pigment will decompose (resulting in color fading, descoloração), and the carrier will degrade (resultando em propriedades mecânicas reduzidas do masterbatch). Esta é outra dificuldade importante no processamento de masterbatch.

Isto exige que o equipamento de extrusão tenha capacidade precisa de controle de temperatura e curto tempo de residência.. O cilindro da extrusora deve ser dividido em múltiplas seções de controle de temperatura, e a temperatura de cada seção deve ser controlada com precisão dentro da faixa ideal (geralmente 150-220°C para masterbatch comum, 200-280℃ para masterbatch de plástico de engenharia), com uma precisão de controle de temperatura de ±1℃. A estrutura do parafuso deve ser otimizada para reduzir o tempo de permanência do material na extrusora (geralmente 1-3 minutos), evitando contato de longo prazo entre o material e alta temperatura.

2.1.3 Desgaste do parafuso e do cilindro causado por pigmentos de alta dureza

Pigmentos inorgânicos como dióxido de titânio e negro de fumo têm alta dureza (Dureza de Mohs 5-7), o que causará sério desgaste ao parafuso e ao cilindro da extrusora durante o processamento de extrusão. Se o parafuso e o cilindro tiverem baixa resistência ao desgaste, eles serão usados ​​rapidamente, resultando em redução da força de cisalhamento e capacidade de mistura da extrusora, afetando a dispersibilidade do masterbatch e reduzindo a vida útil do equipamento.

Isto exige que o parafuso e o cilindro da extrusora sejam feitos de materiais resistentes ao desgaste de alta qualidade e processados ​​por tecnologia de fabricação avançada. Por exemplo, o parafuso e o cilindro podem ser feitos de liga de aço resistente ao desgaste importada, e passar por tratamento compósito bimetálico ou tratamento de revestimento a laser, o que pode melhorar significativamente a resistência ao desgaste e à corrosão do parafuso e do cilindro, e se adaptar ao processamento de masterbatch com pigmentos de alta dureza.

2.1.4 Instabilidade da qualidade do produto entre lotes

O processamento de masterbatch requer controle rigoroso de vários parâmetros (como proporção de fórmula, tempo de mistura, temperatura de extrusão, velocidade do parafuso, velocidade de alimentação). Se os parâmetros flutuarem, a qualidade do masterbatch (como concentração, dispersibilidade, força de tingimento) será instável, resultando em diferença de cor entre lotes de produtos coloridos, o que afetará a reputação do fabricante.

Isto exige que o equipamento de extrusão tenha capacidade de controle inteligente e desempenho estável. A extrusora deve ser equipada com um sistema de controle inteligente PLC, que pode realizar o controle preciso da velocidade de alimentação, velocidade do parafuso, extrusion temperature and other parameters, and store multiple sets of formula parameters. When producing different batches of masterbatch, only the corresponding parameters need to be called, avoiding repeated debugging, ensuring the stability of product quality between batches.

2.1.5 High Requirements on Processing Fluidity

Masterbatch has high pigment content, which will reduce the processing fluidity of the material. If the processing fluidity is too poor, the material will be difficult to convey and extrude, resulting in low production efficiency, unstable extrusion pressure and even equipment blockage.

This requires the extrusion equipment to have strong conveying capacity and adjustable shear force. The twin-screw extruder should adopt a reasonable screw pitch, projeto de taxa de avanço e compressão, and the screw should be equipped with sufficient conveying elements to ensure the smooth conveying of materials. Além disso, the extrusion temperature can be appropriately adjusted to improve the processing fluidity of the material, and lubricants can be added to reduce the friction between materials.

2.2 Working Principle and Process Flow of Masterbatch Twin-Screw Extrusion

The twin-screw extrusion process of masterbatch is a complex physical mixing process, which mainly includes raw material pretreatment, pré-mistura, alimentação, fusão, mixing and shearing, extrusão, resfriamento, granulação, screening and packaging. The core purpose is to uniformly disperse pigments, carriers and additives to form high-quality masterbatch granules. O princípio de funcionamento específico e o fluxo do processo são os seguintes:

2.2.1 Pré-tratamento de matérias-primas

Raw material pretreatment is the foundation of masterbatch extrusion processing, which directly affects the mixing effect and product quality. The raw materials of masterbatch mainly include pigments/dyes, transportadoras, aditivos (dispersantes, compatibilizantes, heat stabilizers, etc.). The pretreatment steps are as follows:

• Drying Treatment: Some pigments (such as organic pigments) and carriers (como PA, BICHO DE ESTIMAÇÃO) tem alta absorção de água. Se o teor de umidade for muito alto, it will cause bubbles, agglomeration and other defects in the masterbatch during extrusion processing, and even cause hydrolytic degradation of the carrier. Portanto, the raw materials must be dried before processing. The drying temperature and time are determined according to the type of raw material: por exemplo, organic pigments are dried at 60-80℃ for 2-4 horas, PE/PP carriers are dried at 80-100℃ for 3-5 horas, and PA carriers are dried at 100-120℃ for 6-8 horas. The moisture content of the dried raw materials should be controlled below 0.1%.
• Crushing and Sieving: For pigments with large particle size (such as titanium dioxide agglomerates) and carriers with uneven particle size, crushing and sieving treatment should be carried out to ensure the uniformity of raw materials. The particle size of the crushed raw materials should be controlled at 20-40 malha, which is conducive to the uniform mixing of raw materials and the breaking of pigment agglomerates during extrusion.
• Impurity Removal: The raw materials may contain impurities (such as metal particles, stones, pó) during production and transportation. Impurities not only affect the quality of the masterbatch, mas também desgaste o parafuso e o cilindro da extrusora, e até mesmo causar bloqueio de equipamentos. Portanto, the raw materials must be filtered and removed before use, using a filter screen with appropriate mesh size to remove impurities.

2.2.2 Pré-mistura

Premixing is the key step to improve the mixing and dispersing effect of masterbatch. According to the formula ratio, the dried, crushed and impurity-removed pigments, carriers and additives are put into a high-speed mixer for premixing. The purpose of premixing is to make the pigments and additives uniformly adhere to the surface of the carrier particles, form a preliminary mixture, and lay a foundation for the uniform dispersion during extrusion.

The key parameters of premixing are mixing speed, mixing time and mixing temperature. The mixing speed is generally 800-1200 rpm, the mixing time is 5-10 minutos, and the mixing temperature is controlled at 40-60℃. The appropriate mixing temperature can improve the adhesion of additives (such as dispersants) to the carrier and pigments, promoting uniform mixing. For masterbatch with high pigment content (como 50% acima), the premixing time can be appropriately extended, and a small amount of dispersant can be added first to improve the dispersibility of pigments. After premixing, the mixture should be uniform in color, without obvious pigment agglomerates and additive particles.

2.2.3 Alimentação e Transporte

The premixed mixture is sent to the feeding hopper of the twin-screw extruder through a screw feeder or a belt feeder. The feeding device of the extruder is usually equipped with a frequency conversion speed regulation function, which can adjust the feeding speed according to the screw speed and extrusion speed to ensure that the materials enter the extrusion cavity stably and uniformly, avoiding material accumulation or insufficient feeding.

The feeding hopper is also equipped with a drying device (such as an electric heating jacket) to prevent the raw materials from absorbing moisture again during feeding. For masterbatch with high pigment content and poor fluidity, a forced feeding device can be selected to ensure the smooth feeding of materials. Além disso, the feeding port of the extruder should be smooth, without dead corners, to avoid material sticking and accumulation.

2.2.4 Fusão, Mixing and Shearing

The materials entering the extrusion cavity of the twin-screw extruder are pushed forward continuously by the rotating screws. The extrusion cavity is composed of a screw and a barrel, e o volume da cavidade de extrusão diminui gradualmente ao longo da direção do eixo. Quando os parafusos giram, os materiais são gradualmente comprimidos sob a ação dos parafusos e do cano, e a pressão na cavidade de extrusão aumenta gradualmente (generally 5-12MPa).

Ao mesmo tempo, os materiais são submetidos a forte força de cisalhamento e força de atrito gerada pelo movimento relativo entre os parafusos e o cilindro, bem como entre os voos de parafuso. The shear force and friction force can fully break the agglomerates of pigments, make the pigments uniformly dispersed in the melted carrier, and promote the fusion and compatibility between the pigment, carrier and additives. A força de atrito também pode gerar uma certa quantidade de calor, which is combined with the external heating of the barrel (electric heating or steam heating) to make the carrier gradually melt and plasticize.

The barrel of the extruder is usually divided into 4-6 temperature control sections (feeding section, melting section, mixing section, homogenizing section, seção de cabeça de matriz), and the temperature of each section is precisely controlled according to the type of masterbatch (carrier type, pigment type). Por exemplo, when processing PE masterbatch, the temperature of the feeding section is 100-120℃, the melting section is 160-180℃, the mixing section is 170-190℃, the homogenizing section is 160-180℃, and the die head section is 150-170℃. The precise temperature control can ensure that the carrier is fully melted without thermal decomposition, and the pigments are not decomposed or discolored.

The screw of the twin-screw extruder adopts a modular design, which can freely combine different screw elements (como transportar elementos, misturando elementos, elementos de corte) according to the type of masterbatch. Por exemplo, when processing masterbatch with high pigment content and easy agglomeration, more mixing elements and shearing elements can be configured to enhance the mixing and dispersing effect; when processing masterbatch with good fluidity, more conveying elements can be configured to improve production efficiency.

2.2.5 Extrusion and Shaping

The fully melted, mixed and dispersed material is pushed to the die head of the extruder by the screws. The die head of the masterbatch extruder is usually equipped with multiple circular die holes (the number and size of die holes are determined according to the particle size of the masterbatch). The material is extruded from the die head at a high speed to form continuous strip-shaped semi-finished products (the diameter of the strip is usually 2-5mm, which can be adjusted according to customer needs).

The temperature of the die head is slightly lower than that of the homogenizing section, which can prevent the material from decomposing due to excessive temperature and ensure the shaping effect of the strip. The extrusion speed is controlled according to the type of masterbatch and the particle size requirement, generally ranging from 1-3m/min. The extrusion pressure should be kept stable (fluctuation within ±0.5MPa), which can ensure the uniform diameter of the strip and the consistency of the masterbatch quality.

2.2.6 Cooling and Solidification

The extruded strip-shaped semi-finished products are sent to a cooling device for rapid cooling and solidification. The cooling method for masterbatch is usually water tank cooling, and the cooling water temperature is controlled at 20-30℃. The length of the cooling water tank is 3-5 metros, and the cooling time is 2-4 minutos. Rapid cooling can make the strip solidify quickly, maintain the shape and size of the strip, and avoid deformation and adhesion.

It should be noted that the cooling speed should be uniform. If the cooling speed is too fast, the internal stress of the strip will be too large, and the strip will be brittle and easy to break during granulation; if the cooling speed is too slow, the strip will be soft and easy to adhere, affecting the granulation effect. Depois de esfriar, the surface of the strip should be dry, smooth and free of bubbles and cracks.

2.2.7 Cutting and Granulation

After cooling and solidification, the strip is sent to a granulator for cutting to form granular masterbatch products. The granulator is equipped with a rotary knife and a fixed knife, and the cutting speed is adjustable (generally 500-1000 rpm). The particle size of the masterbatch is controlled by adjusting the cutting speed and the speed of the strip conveying. The common particle size of masterbatch is 2-5mm (length and diameter are basically the same), which is convenient for mixing with plastic raw materials during later use.

The granulator should be equipped with a screening device to remove unqualified particles (such as too large, too small, agglomerated or broken particles). The qualified particles enter the next process, and the unqualified particles are crushed and recycled (after drying and premixing, they are re-extruded and granulated).

2.2.8 Triagem, Inspection and Packaging

The granulated masterbatch is sent to a vibrating screen for screening to further remove unqualified particles and impurities. The vibrating screen is equipped with a multi-layer screen (different mesh sizes), which can screen out masterbatch particles of different specifications according to customer needs.

After screening, the masterbatch needs to undergo quality inspection. The inspection items mainly include: cor (uniformidade, consistency with the standard sample), dispersibilidade (observed by microscope or test piece coloring), concentração (tinting strength test), teor de umidade, particle size distribution, etc.. Only the masterbatch that meets the quality standards can be packaged.

The packaging of masterbatch adopts sealed and moisture-proof packaging (such as plastic woven bags with inner plastic film, aluminum foil bags), and the packaging weight is usually 25kg/bag or 50kg/bag. The packaging bag is marked with the product name, modelo, cor, concentração, carrier type, data de produção, shelf life, manufacturer and other information. The packaged masterbatch should be stored in a dry, cool and ventilated warehouse, avoiding direct sunlight and moisture, and the shelf life is generally 6-12 meses.

2.3 Key Factors Affecting Masterbatch Twin-Screw Extrusion Effect

The effect of twin-screw extrusion directly affects the quality of masterbatch (dispersibilidade, força de tingimento, stability). There are many factors affecting the extrusion effect, incluindo principalmente características da matéria-prima, formula ratio, premixing effect, extrusion parameters and equipment performance. Mastering these key factors and making scientific adjustments can ensure the stability of the extrusion effect and the consistency of product quality.

2.3.1 Raw Material Characteristics

The type, particle size, moisture content and purity of raw materials have a great impact on the extrusion effect. For pigments, the particle size should be uniform and fine (20-40 malha), and the agglomeration degree should be low; organic pigments have poor heat resistance, so the extrusion temperature should be strictly controlled; inorganic pigments have high hardness, so the extruder should have good wear resistance. For carriers, the melting point and processing temperature should be consistent with the target plastic raw materials, and the compatibility with pigments should be good. For additives, the type and dosage should be reasonable, and the compatibility with carriers and pigments should be good.

Além disso, the moisture content of raw materials must be strictly controlled below 0.1%; if the moisture content is too high, it will cause bubbles and agglomeration in the masterbatch. A pureza das matérias-primas também é muito importante; impurities in raw materials will not only affect the product quality, mas também desgaste o parafuso e o cilindro da extrusora.

2.3.2 Razão de fórmula

The formula ratio of masterbatch (the ratio of pigment, carrier and additive) is the key to determining the quality of the product. The pigment content should be determined according to the coloring requirements and the type of pigment: high-concentration masterbatch (conteúdo de pigmento 50%-80%) can reduce the addition amount and production cost, but requires better dispersibility; low-concentration masterbatch (conteúdo de pigmento 10%-30%) has better dispersibility, but the addition amount is large and the production cost is high.

The dosage of dispersants is generally 1%-5% of the pigment dosage; too little dispersant will lead to poor dispersibility of pigments, and too much dispersant will affect the mechanical properties of the masterbatch and the colored products. The dosage of other additives (compatibilizantes, heat stabilizers, lubrificantes) is generally 0.5%-3%, which should be adjusted according to the type of masterbatch and processing requirements. The formula ratio should be strictly controlled, and the error should be within ±1%, to ensure the consistency of product quality between batches.

2.3.3 Premixing Effect

Premixing is the foundation of extrusion processing. The uniformity of premixing directly affects the mixing and dispersing effect of pigments during extrusion. If the premixing is uneven, the pigments cannot be uniformly adhered to the surface of the carrier, resulting in local agglomeration of pigments, uneven mixing of materials during extrusion, and reduced product dispersibility.

To ensure the premixing effect, it is necessary to control the mixing speed (800-1200 rpm), tempo de mistura (5-10 minutos) and mixing temperature (40-60℃). For masterbatch with high pigment content, the premixing time can be appropriately extended, and the dispersant can be added first and mixed with the pigment, then mixed with the carrier and other additives. Além disso, the premixed mixture should be inspected; if there are obvious pigment agglomerates, it should be crushed and remixed.

2.3.4 Parâmetros de extrusão

Extrusion parameters are the most important factors affecting the extrusion effect, incluindo principalmente a velocidade do parafuso, temperatura de extrusão e pressão de extrusão.

• Velocidade do parafuso: The screw speed of twin-screw extruders for masterbatch processing generally ranges from 200 para 800 rpm. Quanto maior a velocidade do parafuso, maior será a força de cisalhamento e a força de atrito recebida pelos materiais, the better the mixing and dispersing effect of pigments, and the higher the production efficiency. No entanto, se a velocidade do parafuso for muito alta, o tempo de residência dos materiais na cavidade de extrusão é muito curto, resulting in incomplete melting of the carrier, insufficient mixing of materials, and uneven dispersibility; if the screw speed is too low, the shear force and friction force are insufficient, the pigment agglomerates cannot be fully broken, and the production efficiency is low.
• The screw speed should be adjusted according to the type of masterbatch: for masterbatch with high pigment content and easy agglomeration (such as black masterbatch, white masterbatch), a higher screw speed (500-800 rpm) is needed to ensure the uniform dispersion of pigments; for masterbatch with organic pigments (poor heat resistance), a moderate screw speed (300-500 rpm) is needed to avoid overheating and pigment decomposition.
• Temperatura de extrusão: The extrusion temperature is the key to ensuring the melting of the carrier and the stability of the pigment. The temperature of each section of the barrel and die head must be precisely controlled according to the type of masterbatch (carrier type, pigment type). A temperatura da seção de alimentação é mais baixa (slightly higher than the drying temperature of the raw materials), que é principalmente para evitar que os materiais endureçam e garantir uma alimentação suave; a temperatura da seção de fusão é média, which is mainly to promote the melting and plasticization of the carrier; a temperatura da seção de mistura é mais alta, which is mainly to enhance the shear and mixing effect, and promote the uniform dispersion of pigments; the temperature of the homogenizing section is slightly lower than the mixing section, which is mainly to ensure the uniform temperature and viscosity of the materials, and avoid thermal decomposition; the temperature of the die head section is slightly lower than the homogenizing section, which is to ensure the shaping effect of the strip.
• The temperature control precision should reach ±1℃. Por exemplo, when processing PP masterbatch with organic pigments, the temperature of each section is: feeding section 110-130℃, melting section 170-190℃, mixing section 180-200℃, homogenizing section 170-190℃, die head section 160-180℃. If the temperature is too high, the pigment will decompose and the carrier will degrade; if the temperature is too low, the carrier will not be fully melted, and the pigment cannot be uniformly dispersed.
• Pressão de Extrusão: The extrusion pressure of masterbatch twin-screw extrusion generally ranges from 5 to 12MPa. The pressure in the extrusion cavity is mainly determined by the compression ratio of the screw, the die hole size and the screw speed. The higher the extrusion pressure, the better the mixing and dispersing effect of materials, and the denser the strip. No entanto, if the pressure is too high, it will increase the energy consumption and wear of the equipment, and even cause the die head to block; if the pressure is too low, the materials cannot be fully compressed and mixed, the strip is loose, and the dispersibility is poor.
• The extrusion pressure should be adjusted according to the type of masterbatch and the die head size: for masterbatch with high pigment content and poor fluidity, a higher extrusion pressure is needed; for masterbatch with good fluidity, a moderate extrusion pressure is sufficient. The extrusion pressure should be kept stable, and the fluctuation should be within ±0.5MPa, to ensure the uniform diameter of the strip and the consistency of the masterbatch quality.

2.3.5 Equipment Performance

The performance of the twin-screw extruder directly determines the extrusion effect. The key performance indicators of the extruder include mixing and dispersing capacity, precisão de controle de temperatura, resistência ao desgaste, conveying capacity and intelligent control capacity. Série completa de extrusoras de Zhuoyue (HTS BÁSICO/PLUS/SUPER, ZTE, HTE) são especialmente projetados para processamento de masterbatch, with excellent performance in these aspects, which can effectively meet the processing needs of different types of masterbatch.

3. Zhuoyue’s Full Series Extruders: Professional Solutions for Masterbatch Processing

Zhuoyue has long been engaged in the research, development and production of high-performance twin-screw extruders, and has accumulated rich experience in the field of masterbatch processing. According to the processing characteristics of masterbatch (alto teor de pigmento, fácil aglomeração de pigmentos, strict temperature control requirements, high wear resistance requirements) and the diverse needs of manufacturers (different production scales, different masterbatch types, different application fields), Zhuoyue has launched a full series of extruders suitable for masterbatch processing, including HTS BASIC series, HTS PLUS series, HTS SUPER series, ZTE series and HTE series. Each series has its own performance characteristics and targeted adaptation scenarios, which can provide personalized and efficient processing solutions for masterbatch manufacturers of different scales.

3.1 Core Advantages of Zhuoyue’s Extruders for Masterbatch Processing

Whether it is the high-end HTS SUPER series or the cost-effective ZTE series, all Zhuoyue’s extruders have the following core advantages, which are specially optimized for masterbatch processing, ensuring high-quality, produção eficiente e estável:

3.1.1 Excellent Mixing and Dispersing Effect

The core requirement of masterbatch processing is the uniform dispersion of pigments. All Zhuoyue’s twin-screw extruders adopt an intermeshing co-rotating structure, com um passo de parafuso razoável, projeto de taxa de avanço e compressão. The intermeshing and rotating of the twin screws can generate strong shear force and kneading force, which can fully break the agglomerates of pigments (even small agglomerates of 100μm above), and make the pigments uniformly dispersed in the carrier. The mixing uniformity of the extruders can reach more than 95%, which is much higher than that of ordinary twin-screw extruders (85%-90%).

Além disso, the screws of all series of extruders adopt a modular design, which can freely combine different types of screw elements (elementos de transporte, misturando elementos, elementos de corte) according to the type of masterbatch (such as color masterbatch, white masterbatch, black masterbatch) and pigment characteristics. Por exemplo, when processing black masterbatch with carbon black (easy agglomeration), more mixing elements and shearing elements can be configured to enhance the mixing and dispersing effect; when processing color masterbatch with organic pigments (poor heat resistance), more conveying elements and fewer shearing elements can be configured to shorten the residence time and avoid pigment decomposition.

3.1.2 Precise Temperature Control, Avoiding Pigment Decomposition

Masterbatch processing has strict requirements on temperature control, and the temperature fluctuation must be controlled within ±1℃ to avoid pigment decomposition and carrier degradation. All Zhuoyue’s extruders adopt an advanced intelligent temperature control system, which is composed of high-precision temperature sensors, heating elements and cooling elements. The barrel is divided into 4-6 independent temperature control sections, and the temperature of each section can be precisely adjusted and controlled in real time.

O sistema de controle de temperatura está equipado com uma função de monitoramento e alarme em tempo real: se a temperatura de qualquer seção exceder a faixa definida, o sistema emitirá um aviso de alarme a tempo, and automatically adjust the heating power or start the cooling system to return the temperature to the set range. Além disso, the barrel of the extruder adopts a double-layer jacket design, que pode realizar aquecimento e resfriamento rápidos, e melhorar a velocidade de resposta do controle de temperatura. A cabeça de roscar também está equipada com um dispositivo independente de controle de temperatura, which ensures the uniform temperature of the die head and the stable shaping of the strip.

3.1.3 Alta resistência ao desgaste, Longa vida útil

Pigmentos inorgânicos como dióxido de titânio e negro de fumo têm alta dureza, which will cause serious wear to the screw and barrel of the extruder during processing. Zhuoyue’s extruders adopt high-quality wear-resistant materials and advanced manufacturing technology to ensure the wear resistance of the core components.

The screws and barrels of HTS PLUS series, HTS SUPER series and HTE series are made of imported wear-resistant alloy steel (such as 38CrMoAlA), e passar por tratamento compósito bimetálico ou tratamento de revestimento a laser. The surface hardness of the screws and barrels can reach ≥65 HRC (HTS PLUS series, HTE series) and ≥70 HRC (HTS SUPER series), which has extremely strong wear resistance and corrosion resistance, and can effectively resist the wear caused by high-hardness pigments. The service life of the screws and barrels is 2-3 times that of ordinary extruders, reducing the frequency of component replacement and the maintenance cost of the equipment.

The screws and barrels of HTS BASIC series and ZTE series are made of high-quality wear-resistant alloy steel with nitriding treatment, and the surface hardness can reach ≥60 HRC, which can meet the processing needs of ordinary masterbatch (pigment content ≤50%) and has a reasonable cost performance.

3.1.4 Alta eficiência de produção, Energy Saving and Environmental Protection

Zhuoyue’s extruders adopt a high-torque gearbox and an optimized screw structure, which have strong conveying capacity and high production efficiency. Compared with ordinary twin-screw extruders, the production efficiency of Zhuoyue’s extruders can be increased by 20%-50%. Por exemplo, the production capacity of HTS SUPER series extruders can reach 1000-3000kg/h, which is suitable for large-scale mass production; the production capacity of ZTE series extruders is 100-500kg/h, which is suitable for small and medium-sized batch production.

Além disso, all Zhuoyue’s extruders adopt high-efficiency motors and energy-saving heating elements, which can reduce energy consumption by 15%-20% compared with ordinary extruders. The extruders are equipped with a closed structure, which can reduce the emission of dust and volatile substances during processing, meeting the environmental protection requirements of the masterbatch industry.

3.1.5 Intelligent Control, Easy Operation and Maintenance

All Zhuoyue’s extruders adopt a PLC intelligent control system and a touch screen operation interface, que é simples e intuitivo, fácil de operar. O sistema pode armazenar vários conjuntos de fórmulas de produtos e parâmetros de processamento (até 100 sets), and when producing different types of masterbatch, only the corresponding formula and parameters need to be called, sem depuração repetida, o que economiza tempo e melhora a eficiência da produção.

The system is also equipped with a real-time monitoring function, which can monitor the key parameters of the extrusion process (such as temperature, pressão, velocidade do parafuso, velocidade de alimentação) in real time, and record the production data (such as output, processing time) for later query and analysis. For the HTS SUPER series extruders, we also provide a cloud control function, which can realize remote parameter adjustment, production data monitoring and predictive maintenance of equipment, realizing intelligent production management.

Além disso, the extruders adopt a reasonable structural design, which makes the maintenance more convenient. Os parafusos, barrels and die heads can be disassembled and assembled quickly, o que reduz o tempo de manutenção e a intensidade do trabalho. Zhuoyue’s after-sales service team will provide professional installation, serviços de comissionamento e treinamento para clientes, garantindo que os clientes possam usar o equipamento sem problemas.

3.1.6 Wide Application Range, Strong Adaptability

Zhuoyue’s full series of extruders have a wide application range, which can adapt to the processing needs of various types of masterbatch, including color masterbatch, white masterbatch, black masterbatch, ordinary masterbatch, masterbatch funcional (masterbatch retardador de chama, masterbatch antiestático), and masterbatch with different carriers (Educação Física, PP, PVC, PA, BICHO DE ESTIMAÇÃO, etc.). The extruders can also adapt to the processing of masterbatch with different pigment contents (10%-80%), and can meet the processing needs of different application fields (fibers, filmes, moldagem por sopro, extrusão, moldagem por injeção).

Whether it is a small and medium-sized manufacturer producing ordinary masterbatch, or a large-scale manufacturer producing high-end functional masterbatch, Zhuoyue can provide suitable extruder solutions. Além disso, the extruders can be matched with different auxiliary equipment (como misturadores de alta velocidade, dryers, coolers, granulators, screening machines, packaging machines) to form a complete automatic production line, realizing continuous production from raw material pretreatment to product packaging.

3.2 Detailed Introduction of Zhuoyue’s Extruder Series and Their Adaptation to Masterbatch Processing

Zhuoyue’s extruder series for masterbatch processing include HTS BASIC, HTS PLUS, HTS SUPER, ZTE and HTE, each series has its own unique performance characteristics and targeted adaptation scenarios. Manufacturers can select the appropriate extruder series according to their own production scale, product type, masterbatch concentration, application field and budget.

3.2.1 HTS BASIC Series Extruders: Flexible and Cost-Effective Choice for Ordinary Masterbatch

The HTS BASIC series extruders are a cost-effective product series designed for small and medium-sized masterbatch manufacturers or manufacturers that mainly produce ordinary masterbatch. This series of extruders uses medium-torque gearboxes from leading European manufacturers, which have the advantages of stable performance, baixo ruído, high efficiency and long service life. The specific torque of the extruders is 10-12Nm/cm³, which can meet the processing needs of ordinary masterbatch (pigment content ≤50%), such as PE/PP color masterbatch, low-concentration white masterbatch and black masterbatch.

Em termos de projeto estrutural, the HTS BASIC series extruders adopt a twin-screw parallel co-rotating structure, with a screw diameter ranging from 30mm to 65mm, and a compression ratio of 4～8, which can be adjusted according to the type of masterbatch. The barrel is made of wear-resistant alloy steel with nitriding treatment, and the screw is made of wear-resistant and corrosion-resistant alloy steel, which has good wear resistance. The extruder is equipped with a PLC control system and a touch screen operation interface, which can realize automatic feeding, automatic temperature control, automatic pressure control and automatic cutting, and is simple and easy to operate.

The production capacity of the HTS BASIC series extruders ranges from 100kg/h to 500kg/h, which is suitable for small and medium-sized masterbatch manufacturers that mainly produce ordinary masterbatch for films, injection molding and extrusion products. Uma das maiores vantagens desta série é que ela pode oferecer opções flexíveis através de diferentes combinações de configurações. Os clientes podem escolher diferentes elementos de parafuso, morrer cabeças, feeding devices and post-processing equipment according to their own product types and production needs, de modo a formar uma linha de produção adequada às suas próprias necessidades. The HTS BASIC series extruders have a reasonable price, which can help small and medium-sized manufacturers reduce the initial investment cost while ensuring the basic processing quality of masterbatch. It is an ideal choice for enterprises that are just entering the masterbatch industry or have limited production scale and budget. Além disso, this series of extruders has simple operation and low maintenance cost, and its after-sales service support is consistent with other high-end series, which can fully meet the daily production needs of small and medium-sized manufacturers.

3.2.2 Extrusoras da série HTS PLUS: High-Torque Solution for Engineering Plastics and Filler Masterbatch

The HTS PLUS series extruders are positioned as mid-to-high-end products, specially developed for masterbatch processing scenarios with higher requirements, such as engineering plastic masterbatch and filler masterbatch. Different from the HTS BASIC series, this series adopts high-torque gearboxes independently developed and manufactured by Zhuoyue, with a specific torque of 13-16Nm/cm³, which can provide stronger shear force and kneading force, effectively solving the processing difficulties of high-viscosity, high-hardness masterbatch materials.

In terms of core components, the screws and barrels of the HTS PLUS series are made of imported wear-resistant alloy steel and undergo bimetallic composite treatment. The surface hardness reaches ≥65 HRC, which has excellent wear resistance and corrosion resistance, and can easily cope with the wear caused by filler masterbatch (como carbonato de cálcio, talcum powder filled masterbatch) and engineering plastic masterbatch (como PA, PC masterbatch). The screw adopts a modular design, and is equipped with enhanced mixing elements and shearing elements, which can fully disperse the fillers and pigments in the carrier, ensuring the uniformity and stability of the masterbatch. The barrel is divided into 5-6 temperature control sections, com uma precisão de controle de temperatura de ±1℃, which can accurately control the processing temperature of engineering plastics (200-280℃) and avoid material decomposition.

The production capacity of the HTS PLUS series extruders ranges from 300kg/h to 1200kg/h, which is suitable for medium-sized and large-scale masterbatch manufacturers that produce engineering plastic masterbatch, masterbatch de enchimento, high-concentration color masterbatch (conteúdo de pigmento 50%-70%) e outros produtos. Por exemplo, in the processing of PA engineering plastic masterbatch, the HTS PLUS series can rely on its high torque and precise temperature control to ensure that the PA carrier is fully melted, and the pigments and functional additives are uniformly dispersed, avoiding the problems of color spots, streaks and poor mechanical properties of the masterbatch. In the processing of filler masterbatch, its strong shear force can fully disperse the filler particles (which are easy to agglomerate) in the carrier, improving the compatibility between the filler and the carrier, and ensuring the processing performance of the masterbatch when mixed with downstream plastic raw materials.

Além disso, the HTS PLUS series extruders are equipped with an upgraded PLC intelligent control system, which can realize more precise parameter control and data monitoring. The system can automatically adjust the screw speed, feeding speed and extrusion pressure according to the material viscosity and processing effect, ensuring the stability of product quality between batches. The extruder is also equipped with a forced feeding device and a vacuum exhaust device: the forced feeding device can ensure the smooth feeding of high-viscosity materials; the vacuum exhaust device can effectively remove moisture, volatile substances and air in the materials, avoiding bubbles and pores in the masterbatch, and improving the density and quality of the masterbatch. This series of extruders balances performance and cost, and is suitable for manufacturers that need to improve product quality and expand production scale.

3.2.3 HTS SUPER Series Extruders: The Pinnacle of Zhuoyue’s Technology for High-End Masterbatch

As Zhuoyue’s highest-end extruder series, the HTS SUPER series represents the advanced level of China’s twin-screw extruder development, specially designed for high-end, high-demand masterbatch processing scenarios, such as high-concentration functional masterbatch, special engineering plastic masterbatch (such as PBT, POM, PCL), and masterbatch for high-end downstream fields (new energy vehicles, dispositivos médicos, high-end electronics).

The core highlight of the HTS SUPER series is the adoption of Zhuoyue’s latest independently developed ultra-high torque transmission device, with a specific torque of 17-20Nm/cm³, which is far higher than that of the HTS PLUS series. This ultra-high torque design enables the extruder to cope with the processing of ultra-high viscosity, ultra-high hardness masterbatch materials, such as masterbatch with high filler content (filler content above 60%) and special engineering plastic masterbatch with high melting point and high viscosity. Ao mesmo tempo, aiming at the high torque and high speed characteristics of this series, Zhuoyue has carried out a comprehensive optimization of the structural design of all key components of the extruder: the screw adopts a new type of wear-resistant alloy steel and undergoes laser cladding treatment, with a surface hardness of ≥70 HRC, which has extremely strong wear resistance and service life (3-4 times that of ordinary extruders); the barrel adopts a double-layer jacket + forced cooling structure, which can realize rapid temperature adjustment and precise control, avoiding local overheating of materials during high-speed, high-torque processing; the gearbox adopts a precision planetary gear structure, with low noise, high efficiency and stable operation, which can withstand long-term high-load work.

In terms of mixing and dispersing effect, the HTS SUPER series is equipped with a new type of multi-stage mixing screw combination, including high-shear mixing elements, kneading blocks and dispersing elements, which can generate multi-directional shear force and kneading force, fully breaking the agglomerates of pigments and fillers (even agglomerates below 50μm), and making the pigments, fillers and carriers uniformly mixed. The mixing uniformity of the masterbatch can reach more than 98%, which is suitable for the processing of high-concentration, high-dispersibility masterbatch (conteúdo de pigmento 70%-80%). Além disso, this series of extruders adopts a variable frequency speed regulation system with high precision, and the screw speed can be adjusted in the range of 300-1000 rpm, which can be flexibly adjusted according to the type of masterbatch and processing requirements, ensuring the best processing effect.

The production capacity of the HTS SUPER series extruders ranges from 1000kg/h to 3000kg/h, which is suitable for large-scale, high-standard masterbatch manufacturers that focus on high-end markets. Por exemplo, in the processing of masterbatch for new energy vehicle parts (such as automotive interior and exterior parts, battery shell masterbatch), the HTS SUPER series can ensure that the masterbatch has excellent weather resistance, high temperature resistance and dispersibility, meeting the strict quality requirements of automotive manufacturers; in the processing of medical grade masterbatch (such as masterbatch for medical catheters, medical containers), it can realize clean production, avoid material pollution, and ensure that the masterbatch meets the medical grade environmental protection standards. This series of extruders is also equipped with an intelligent cloud control system, which can realize remote parameter adjustment, production data monitoring, fault early warning and predictive maintenance. Manufacturers can monitor the production status of the equipment in real time through mobile phones or computers, realize intelligent production management, and greatly improve production efficiency and management level.

3.2.4 ZTE Series Extruders: Cost-Effective Choice for Universal Masterbatch Processing

The ZTE series extruders are positioned as cost-effective products, specially designed for manufacturers that need to balance processing quality and cost, and mainly produce universal ordinary masterbatch. This series of extruders has excellent cost performance, and its designed parameters can meet the processing needs of most common masterbatch materials (Educação Física, PP, PVC masterbatch, low-concentration color masterbatch, black masterbatch and white masterbatch with pigment content ≤50%).

Em termos de projeto estrutural, the ZTE series adopts a twin-screw parallel co-rotating structure, with a screw diameter ranging from 25mm to 65mm, and a specific torque of 8-11Nm/cm³, which can provide sufficient shear force and conveying capacity for ordinary masterbatch processing. The screws and barrels are made of high-quality wear-resistant alloy steel with nitriding treatment, and the surface hardness reaches ≥60 HRC, which can meet the wear requirements of ordinary pigments (such as organic pigments, low-hardness inorganic pigments) and has a long service life. The barrel is divided into 4 temperature control sections, with a temperature control precision of ±2℃, which can accurately control the processing temperature of ordinary masterbatch (150-220℃), avoiding pigment decomposition and carrier degradation.

The production capacity of the ZTE series extruders ranges from 50kg/h to 400kg/h, which is suitable for small and medium-sized masterbatch manufacturers, small workshops and enterprises that need to produce small batches of multi-variety masterbatch. This series of extruders has the advantages of simple structure, operação fácil, low energy consumption and low maintenance cost. The operation interface adopts a simple touch screen design, which is easy to learn and master, and is suitable for operators with little experience. Além disso, the ZTE series can also be flexibly configured according to customer needs, such as adding a forced feeding device, a vacuum exhaust device or a special die head, to meet the personalized processing needs of different customers. Although the ZTE series is cost-effective, its core performance indicators (such as mixing uniformity, precisão de controle de temperatura) are far higher than those of ordinary extruders on the market, which can ensure that the produced masterbatch has uniform coloring, stable performance and meets the basic use requirements of downstream customers. It is an ideal choice for enterprises with limited budget and mainly producing ordinary masterbatch.

3.2.5 Extrusoras da série HTE: High-Performance and Cost-Effective Integrated Solution

The HTE series extruders integrate the advantages of high performance and cost-effectiveness, aiming at medium-sized masterbatch manufacturers that need to improve production efficiency and product quality while controlling costs. This series of extruders is designed to balance performance, efficiency and cost, and is suitable for a variety of masterbatch processing scenarios, including high-concentration color masterbatch (conteúdo de pigmento 50%-60%), ordinary functional masterbatch (masterbatch retardador de chama, masterbatch antiestático) and masterbatch for films, blow molding and injection molding products.

In terms of core performance, the HTE series adopts a high-torque gearbox independently developed by Zhuoyue, with a specific torque of 12-14Nm/cm³, which is higher than that of the HTS BASIC and ZTE series, and can provide stronger shear force and kneading force, ensuring the uniform dispersion of pigments and additives. The screws adopt a modular design, and are equipped with a combination of conveying elements, mixing elements and shearing elements, which can be flexibly adjusted according to the type of masterbatch, improving the adaptability of the extruder. The screws and barrels are made of imported wear-resistant alloy steel with bimetallic composite treatment, and the surface hardness reaches ≥65 HRC, which has excellent wear resistance and can cope with the processing of high-hardness pigments (such as titanium dioxide, carbon black) and low-content filler masterbatch.

The biggest advantage of the HTE series is that it can reduce energy consumption while improving production efficiency. This series of extruders adopts an optimized screw structure and a high-efficiency energy-saving motor, which can reduce energy consumption by 18%-25% compared with ordinary extruders of the same type. Ao mesmo tempo, its production capacity ranges from 200kg/h to 800kg/h, which is 15%-20% higher than that of the HTS BASIC series of the same specification. The barrel is divided into 5 temperature control sections, com uma precisão de controle de temperatura de ±1℃, which can accurately control the processing temperature, avoid material waste caused by overheating or insufficient melting, and further reduce production costs. Além disso, the HTE series is equipped with a PLC intelligent control system, which can realize automatic parameter control, data monitoring and formula storage, ensuring the stability of product quality between batches. The extruder is also equipped with a vacuum exhaust device and a forced feeding device, which can improve the quality of masterbatch and ensure the smooth progress of production.

The HTE series is suitable for medium-sized masterbatch manufacturers that are in the stage of expanding production scale and upgrading product quality. It can not only meet the processing needs of high-quality masterbatch, but also control the production cost effectively, helping enterprises improve their market competitiveness. Compared with the HTS PLUS series, the HTE series has a more reasonable price; compared with the ZTE series, it has better performance and higher production efficiency, which is a cost-effective choice between mid-range and high-end products.

4. Wide Application Fields of Masterbatch and Matching Zhuoyue Extruder Solutions

As an indispensable core material in the plastics industry, masterbatch is widely used in fibers, filmes, moldagem por sopro, extrusion molding, injection molding and other fields. Different application fields have different requirements on the performance of masterbatch (such as dispersibility, resistência à temperatura, color fastness) and production efficiency, which also determines the selection of twin-screw extruders. Zhuoyue’s full series of extruders can provide targeted solutions for different application fields, ensuring that the produced masterbatch meets the specific requirements of downstream products. The following is a detailed introduction to the application fields of masterbatch and the matching Zhuoyue extruder series.

4.1 Fiber Field: High-Dispersibility and Color Fastness Requirements

Masterbatch in the fiber field is mainly used for coloring chemical fibers, como fibra de poliéster, fibra de náilon, polypropylene fiber, etc., and the final products include carpets, têxteis, cushions, non-woven fabrics, etc.. This field has extremely high requirements on masterbatch: primeiro, alta dispersibilidade. The fiber diameter is very small (usually a few microns to dozens of microns), and if the pigments in the masterbatch are not uniformly dispersed, it will cause color spots, streaks and uneven fineness of the fiber, affecting the appearance and quality of the fiber product; segundo, high color fastness. The fiber products need to go through spinning, weaving, dyeing and finishing and other processes, and the masterbatch must have good washing fastness, light fastness and friction fastness, avoiding color fading and discoloration; terceiro, low impurity content. Impurities in the masterbatch will cause breakage of the fiber during spinning, reducing the yield of the fiber.

According to the requirements of the fiber field, the suitable Zhuoyue extruder series are HTS PLUS series, HTS SUPER series and HTE series. For high-end fiber masterbatch (such as high-grade textile fiber, carpet fiber), the HTS SUPER series is recommended. Its ultra-high mixing uniformity (≥98%) can ensure that the pigments are uniformly dispersed in the carrier, avoiding color spots and streaks of the fiber; the high-torque and precise temperature control can ensure the stability of the masterbatch performance, improving the color fastness of the fiber. For medium-grade fiber masterbatch (such as ordinary textile fiber, non-woven fabric), the HTS PLUS series and HTE series are recommended. Their high mixing and dispersing effect can meet the basic requirements of fiber masterbatch, and the cost performance is higher. For small-batch, low-cost fiber masterbatch, the HTS BASIC series can also be selected, which can ensure the basic dispersibility and color fastness.

4.2 Film Field: High Transparency and Uniform Coloring Requirements

Masterbatch in the film field is mainly used for coloring plastic films, such as shopping bags, casting films, multi-layer films, filmes de embalagem, filmes agrícolas, etc.. The key requirements of this field for masterbatch are: primeiro, high transparency. For transparent or translucent films (such as food packaging films, filmes de cobertura agrícola), the masterbatch must have good transparency, avoiding affecting the appearance and visibility of the packaged products; segundo, coloração uniforme. The film surface must be uniform in color, without color spots, color streaks and color difference, ensuring the aesthetic property of the film; terceiro, good processing fluidity. The film extrusion speed is fast, and the masterbatch must have good fluidity, which is conducive to the uniform mixing of the masterbatch and the film base material, and avoiding affecting the film forming efficiency.

For the film field, the suitable Zhuoyue extruder series are HTS BASIC series, HTE series and HTS PLUS series. For ordinary film masterbatch (such as shopping bags, ordinary packaging films), the HTS BASIC series and HTE series are recommended. Their good mixing and dispersing effect can ensure uniform coloring of the film, and the good processing fluidity can match the high-speed extrusion of the film. For high-end film masterbatch (such as food packaging films, multi-layer composite films), the HTS PLUS series is recommended. Its precise temperature control can avoid the decomposition of pigments and carriers, ensuring the transparency and safety of the film; the enhanced mixing elements can further improve the dispersibility of the masterbatch, making the film surface more smooth and uniform. For ultra-high transparent film masterbatch (such as PET packaging films), the HTS SUPER series can be selected, which can achieve ultra-high dispersibility of pigments, ensuring the transparency and clarity of the film.

4.3 Blow Molding Field: Good Fluidity and Dimensional Stability Requirements

Masterbatch in the blow molding field is mainly used for coloring blow molding products, such as medical and cosmetic containers, lubricating oil and paint containers, garrafas de bebidas, barris de plástico, etc.. The requirements of this field for masterbatch are: primeiro, good processing fluidity. Blow molding products need to be formed by high-temperature blow molding, and the masterbatch must have good fluidity, which is conducive to the uniform distribution of the masterbatch in the parison, avoiding uneven wall thickness and color difference of the product; segundo, good dimensional stability. The blow molding products have strict requirements on dimensional accuracy, and the masterbatch must have stable performance, avoiding the deformation of the product due to uneven shrinkage; terceiro, environmental protection. Especially for medical and cosmetic containers, the masterbatch must meet environmental protection standards, non-toxic and harmless, without volatile substances.

For the blow molding field, the suitable Zhuoyue extruder series are ZTE series, HTS BASIC series and HTE series. For ordinary blow molding masterbatch (such as lubricating oil containers, barris de plástico), the ZTE series and HTS BASIC series are recommended. Their reasonable screw structure and temperature control system can ensure the good fluidity and stability of the masterbatch, meeting the basic requirements of blow molding products. For medium-grade blow molding masterbatch (such as cosmetic containers, garrafas de bebidas), the HTE series is recommended. Its high production efficiency and energy-saving advantages can reduce production costs, and the good mixing and dispersing effect can ensure uniform coloring and dimensional stability of the product. For high-end blow molding masterbatch (such as medical containers), the HTS PLUS series and HTS SUPER series are recommended. Their high-precision temperature control and clean production design can ensure that the masterbatch meets medical grade standards, and the stable performance can ensure the dimensional accuracy and safety of the product.

4.4 Extrusion Molding Field: High Dimensional Stability and Wear Resistance Requirements

Masterbatch in the extrusion molding field is mainly used for coloring extrusion products, such as sheets, tubos, fios e cabos, perfis, etc.. The key requirements of this field for masterbatch are: primeiro, high dimensional stability. Extrusion products (such as pipes, perfis) têm requisitos rigorosos de precisão dimensional, and the masterbatch must have stable performance, evitando a deformação e diferença de cor do produto devido ao encolhimento irregular; segundo, boa resistência ao desgaste. Para produtos como tubos, fios e cabos que precisam resistir ao atrito e à extrusão, o masterbatch deve ter boa resistência ao desgaste, garantindo a vida útil do produto; terceiro, boa resistência às intempéries. Para produtos de extrusão ao ar livre (como construir perfis, tubos ao ar livre), o masterbatch deve ter boa resistência às intempéries, evitando desbotamento da cor e degradação do desempenho sob luz solar e chuva.

Para a área de moldagem por extrusão, the suitable Zhuoyue extruder series are HTS PLUS series, Série HTE e série HTS SUPER. Para masterbatch de extrusão comum (como lençóis internos, tubos comuns), a série HTE e a série HTS BASIC são recomendadas. Seu bom efeito de mistura e dispersão pode garantir uma coloração uniforme do produto, and the stable performance can ensure the dimensional accuracy of the product. For medium-grade extrusion masterbatch (such as wires and cables, building profiles), the HTS PLUS series is recommended. Its high-torque gearbox and wear-resistant screw/barrel can cope with the processing of high-hardness, high-viscosity masterbatch, ensuring the wear resistance and weather resistance of the product. For high-end extrusion masterbatch (such as high-temperature resistant pipes, outdoor high-grade profiles), the HTS SUPER series is recommended. Its ultra-high torque and precise temperature control can ensure the stable performance of the masterbatch, and the enhanced wear resistance can further extend the service life of the product.

4.5 Injection Molding Field: High Dispersibility and Batch Stability Requirements

Masterbatch in the injection molding field is the most widely used, mainly used for coloring injection molding products, como peças automotivas, produtos eletrônicos, materiais de construção, home appliances, mobília, brinquedos, etc.. The requirements of this field for masterbatch are diverse, but the core requirements are: primeiro, alta dispersibilidade. Injection molding products have complex shapes and small sizes, and the masterbatch must have high dispersibility, avoiding color spots, color streaks and uneven coloring of the product; segundo, good batch stability. Injection molding products are usually produced in large batches, and the masterbatch must have stable performance, ensuring no color difference between batches of products; terceiro, targeted functional requirements. Por exemplo, automotive parts require masterbatch with high temperature resistance and flame retardancy, electronic products require masterbatch with antistatic performance, and toys require masterbatch with non-toxic and environmental protection performance.

For the injection molding field, Zhuoyue’s full series of extruders can provide corresponding solutions according to different product levels. For ordinary injection molding masterbatch (such as toys, ordinary home appliances), the ZTE series and HTS BASIC series are recommended. Their cost-effective advantages can reduce production costs, and the basic mixing and dispersing effect can meet the requirements of ordinary products. For medium-grade injection molding masterbatch (such as electronic products, ordinary automotive parts), the HTE series and HTS PLUS series are recommended. Their high mixing and dispersing effect and batch stability can ensure the quality of the product, and the targeted functional masterbatch processing capacity can meet the special requirements of the product. For high-end injection molding masterbatch (such as high-grade automotive parts, precision electronic products), the HTS SUPER series is recommended. Its ultra-high dispersibility, batch stability and high-temperature resistance can meet the strict quality requirements of high-end products, and the intelligent control system can ensure the efficiency and stability of large-scale production.

5. Common Problems and Solutions in Masterbatch Twin-Screw Extrusion Processing

In the actual production process of masterbatch, due to the influence of raw materials, fórmula, processing parameters and equipment performance, various problems often occur, which affect the quality of masterbatch and production efficiency. Based on years of industry experience, Zhuoyue summarizes the common problems in masterbatch twin-screw extrusion processing, analyzes the causes in detail, and provides corresponding solutions, which can help manufacturers quickly solve production problems and improve production efficiency and product quality.

5.1 Common Problem 1: Poor Dispersibility of Masterbatch, Color Spots and Streaks in Products

This is the most common problem in masterbatch processing, which is mainly manifested in uneven coloring of the masterbatch, obvious pigment agglomerates, and color spots and streaks in the colored plastic products. The main causes and solutions are as follows:

5.1.1 Main Causes:

• (1) Raw material problems: The pigment particle size is too large, the agglomeration degree is high, and the drying is insufficient; the compatibility between the pigment and the carrier is poor; the dispersant dosage is insufficient or the type is improper.
• (2) Premixing problems: The mixing speed is too low, the mixing time is too short, the mixing temperature is improper, resulting in uneven premixing of raw materials.
• (3) Extrusion parameter problems: The screw speed is too low, the shear force is insufficient, and the pigment agglomerates cannot be fully broken; the extrusion temperature is too low, the carrier is not fully melted, and the pigment cannot be uniformly dispersed.
• (4) Equipment problems: The screw mixing elements are insufficient or worn; the barrel and screw are worn, resulting in reduced shear force; the die head is blocked, affecting the uniform extrusion of materials.

5.1.2 Soluções:

• (1) Optimize raw materials: Select pigments with small particle size and low agglomeration degree, and dry them thoroughly (moisture content ≤0.1%); select carriers compatible with pigments; replace appropriate dispersants and increase the dosage appropriately (dentro de 1%-5% of the pigment dosage).
• (2) Improve premixing effect: Increase the mixing speed to 800-1200 rpm, extend the mixing time to 5-10 minutos, and control the mixing temperature at 40-60℃; for high-concentration masterbatch, add dispersant first and mix with pigment, then mix with carrier and other additives.
• (3) Adjust extrusion parameters: Increase the screw speed appropriately (500-800 rpm for high-concentration masterbatch), improve the shear force; increase the extrusion temperature appropriately to ensure that the carrier is fully melted (adjust according to the carrier type).
• (4) Maintain equipment: Replace worn screw mixing elements, barril e parafuso; clean the die head regularly to avoid blockage; check the equipment regularly to ensure that the screw and barrel are properly matched.

5.2 Common Problem 2: Pigment Decomposition and Discoloration of Masterbatch

This problem is mainly manifested in the discoloration of the masterbatch (such as yellowing, darkening), the color is inconsistent with the standard sample, and even peculiar smell is generated. It is mostly caused by overheating of the material during extrusion processing, which is common in organic pigment masterbatch and engineering plastic masterbatch. The main causes and solutions are as follows:

5.2.1 Main Causes:

• (1) Extrusion temperature is too high: The temperature of the mixing section, homogenizing section or die head is too high, exceeding the heat resistance limit of the pigment or carrier.
• (2) The residence time of the material is too long: The screw speed is too low, the compression ratio is too large, resulting in the material staying in the extrusion cavity for too long (mais do que 3 minutos), and thermal decomposition occurs.
• (3) Poor heat dissipation of the equipment: The cooling system of the barrel fails, resulting in local overheating of the barrel.
• (4) Raw material problems: The heat resistance of the pigment is poor, or the carrier is easy to degrade at high temperature.

5.2.2 Soluções:

• (1) Adjust extrusion temperature: Reduce the temperature of the mixing section, homogenizing section and die head appropriately, and control it within the heat resistance range of the pigment and carrier (150-220℃ for ordinary masterbatch, 200-280℃ para masterbatch de plástico de engenharia); check the temperature sensor regularly to ensure accurate temperature control.
• (2) Shorten the residence time: Increase the screw speed appropriately, reduce the compression ratio of the screw, and ensure that the residence time of the material in the extrusion cavity is 1-3 minutos.
• (3) Maintain the cooling system: Check the cooling water circulation system regularly, clean the cooling pipe, and ensure that the barrel can dissipate heat normally; replace the faulty cooling element in time.
• (4) Optimize raw materials: Select pigments with good heat resistance (such as inorganic pigments for high-temperature processing); select carriers with stable performance and not easy to degrade; add appropriate heat stabilizers (0.5%-3%) to prevent pigment decomposition and carrier degradation.

5.3 Common Problem 3: High Wear of Screw and Barrel, Short Service Life

This problem is common in the processing of white masterbatch, black masterbatch and filler masterbatch, which is mainly manifested in the rapid wear of the screw and barrel, reduced shear force and mixing capacity of the extruder, and increased maintenance cost. The main causes and solutions are as follows:

5.3.1 Main Causes:

• (1) Raw material problems: The pigment or filler has high hardness (such as titanium dioxide, carbon black, carbonato de cálcio), and the particle size is too large, which causes severe wear to the screw and barrel.
• (2) Extrusion parameter problems: The screw speed is too high, the shear force is too large, and the friction between the material and the screw/barrel is increased; the extrusion pressure is too high, which increases the wear of the screw and barrel.
• (3) Equipment problems: The screw and barrel are made of materials with poor wear resistance, or the processing technology is improper; the screw and barrel are not properly matched, resulting in uneven stress and increased wear.

5.3.2 Soluções:

• (1) Optimize raw materials: Select pigments or fillers with small particle size (20-40 malha) and low hardness; crush and sieve the raw materials to remove large particles; add appropriate lubricants (0.5%-2%) to reduce the friction between the material and the screw/barrel.
• (2) Adjust extrusion parameters: Reduce the screw speed and extrusion pressure appropriately, and control the shear force within a reasonable range; avoid long-term high-speed and high-pressure operation of the equipment.
• (3) Select high-wear-resistant equipment: Select extruders with high-wear-resistant screws and barrels, such as Zhuoyue’s HTS PLUS, HTS SUPER and HTE series, whose screws and barrels are made of imported wear-resistant alloy steel and undergo bimetallic composite or laser cladding treatment, which can greatly improve the service life; regularly check the wear of the screw and barrel, and replace them in time when the wear is serious.

5.4 Common Problem 4: Instabilidade da qualidade do produto entre lotes, Color Difference

This problem is mainly manifested in the inconsistency of masterbatch quality (como concentração, dispersibilidade, cor) between different batches, resulting in color difference of downstream products, which affects the reputation of the manufacturer. The main causes and solutions are as follows:

5.4.1 Main Causes:

• (1) Formula problem: The formula ratio is not strictly controlled, and the dosage of pigment, dispersant and other additives fluctuates (error exceeds ±1%).
• (2) Raw material problem: The performance of raw materials (such as pigment tinting strength, carrier melting point) of different batches is inconsistent.
• (3) Processing parameter problem: The extrusion temperature, velocidade do parafuso, feeding speed and other parameters fluctuate between different batches, resulting in inconsistent processing effect.
• (4) Equipment problem: The equipment has poor stability, and the parameters (such as temperature, pressão) cannot be kept stable for a long time.

5.4.2 Soluções:

• (1) Strictly control the formula ratio: Use high-precision weighing equipment to weigh raw materials, and the error is controlled within ±1%; establish a formula management system, and record the dosage of each raw material in detail.
• (2) Standardize raw material procurement and inspection: Select raw material suppliers with stable quality, and inspect the performance of raw materials (such as tinting strength, particle size, teor de umidade) before use; for raw materials of different batches, conduct trial production first to ensure consistent performance.
• (3) Standardize processing parameters: Use an intelligent control system (such as Zhuoyue’s PLC control system) to store the processing parameters of different masterbatch, and call the corresponding parameters when producing different batches, avoiding repeated debugging; regularly check the equipment parameters to ensure stable operation.
• (4) Establish quality inspection system: Conduct strict quality inspection on each batch of masterbatch, incluindo cor, dispersibilidade, concentration and other indicators, and only deliver the products that meet the standards.

5.5 Common Problem 5: Poor Processing Fluidity of Masterbatch, Difficult Extrusion, Bloqueio de equipamento

This problem is mainly manifested in the difficulty of material conveying and extrusion, low production efficiency, pressão de extrusão instável, and even blockage of the die head and extrusion cavity, which affects the normal production. The main causes and solutions are as follows:

5.5.1 Main Causes:

• (1) Raw material problem: The carrier has poor fluidity, or the pigment content is too high (mais do que 80%), resulting in poor fluidity of the mixture; the raw material has high moisture content, which causes the material to agglomerate and block the feeding port.
• (2) Premixing problem: The premixing is uneven, and the dispersant is not fully mixed, resulting in poor fluidity of the material.
• (3) Extrusion parameter problem: The extrusion temperature is too low, the carrier is not fully melted, and the fluidity is poor; the screw speed is too low, the conveying capacity is insufficient; the die head hole is too small, and the extrusion resistance is too large.
• (4) Equipment problem: The screw conveying elements are worn, the conveying capacity is reduced; the feeding device fails, resulting in uneven feeding.

5.5.2 Soluções:

• (1) Optimize raw materials: Select carriers with good fluidity; reduce the pigment content appropriately (control within 80%); dry the raw materials thoroughly to control the moisture content below 0.1%.
• (2) Improve premixing effect: Extend the premixing time, increase the mixing speed, garantir que o dispersante esteja totalmente misturado com o pigmento e o transportador, e melhorar a fluidez da mistura.
• (3) Adjust extrusion parameters: Aumente a temperatura de extrusão adequadamente para garantir que o transportador esteja totalmente derretido; aumentar a velocidade do parafuso para melhorar a capacidade de transporte; substitua a cabeça de rosca por furos maiores para reduzir a resistência à extrusão.
• (4) Maintain equipment: Substitua os elementos de transporte por parafuso desgastados; verifique o dispositivo de alimentação regularmente, e reparar ou substituir as peças defeituosas a tempo; limpe regularmente a porta de alimentação e a cavidade de extrusão para evitar acúmulo e bloqueio de material.

6. Casos práticos de aplicação de extrusoras Zhuoyue no processamento de masterbatch

Para verificar ainda mais as vantagens de desempenho e os efeitos da aplicação da série completa de extrusoras da Zhuoyue no processamento de masterbatch, this section will introduce several practical application cases, covering different masterbatch types, production scales and application fields. These cases fully demonstrate that Zhuoyue’s extruders can provide targeted and efficient processing solutions for different manufacturers, helping manufacturers improve production efficiency, product quality and market competitiveness.

6.1 Caso 1: Application of HTS SUPER Series in High-Concentration Black Masterbatch Processing for New Energy Vehicles

Customer Background: A large-scale masterbatch manufacturer in Jiangsu, China, mainly produces high-end functional masterbatch, focusing on the new energy vehicle field. The customer needs to produce high-concentration black masterbatch (carbon black content 70%) for automotive battery shell parts. The masterbatch requires ultra-high dispersibility (no black spots and streaks in the product), high temperature resistance (can withstand 200℃ high temperature without discoloration), and good batch stability. The customer’s original equipment has problems such as insufficient mixing and dispersing effect, unstable temperature control, and low production efficiency, which cannot meet the production requirements.

Solução: Zhuoyue recommends the HTS SUPER series twin-screw extruders (screw diameter 75mm) for the customer. This series adopts ultra-high torque gearboxes and laser-clad wear-resistant screws/barrels, which can provide strong shear force and wear resistance, effectively solving the problem of carbon black agglomeration; the 6-section precise temperature control system (temperature control precision ±1℃) can accurately control the extrusion temperature, avoiding carbon black decomposition; the multi-stage mixing screw combination ensures that the carbon black is uniformly dispersed in the PE carrier; the intelligent cloud control system can realize remote parameter adjustment and data monitoring, ensuring batch stability.

Application Effect: After using the HTS SUPER series extruders, the customer’s high-concentration black masterbatch has achieved ultra-high dispersibility, and the colored battery shell parts have no black spots and streaks, which meets the strict requirements of new energy vehicle manufacturers; the high temperature resistance of the masterbatch has been significantly improved, and no discoloration occurs at 200℃; the production efficiency has increased from 500kg/h to 1200kg/h, and the energy consumption has decreased by 22%; the batch stability of the masterbatch has been greatly improved, and the color difference between batches is less than 0.5, which has won high recognition from downstream customers. The customer has successively purchased 8 sets of HTS SUPER series extruders, forming a large-scale production line.

6.2 Caso 2: Application of HTS PLUS Series in Engineering Plastic PA Masterbatch Processing

Customer Background: A medium-sized masterbatch manufacturer in Guangdong, China, mainly produces engineering plastic masterbatch, focusing on the automotive and electronic fields. The customer needs to produce PA66 masterbatch (conteúdo de pigmento 50%) for automotive connector parts. The masterbatch requires good dispersibility, high temperature resistance (260℃), and good compatibility with PA66 raw materials. The customer’s original equipment has problems such as poor wear resistance of the screw/barrel, insufficient torque, and easy decomposition of PA66 carrier, which affects the product quality.

Solução: Zhuoyue recommends the HTS PLUS series twin-screw extruders (screw diameter 65mm) for the customer. This series adopts high-torque gearboxes independently developed by Zhuoyue, which can provide sufficient torque for PA66 masterbatch processing; the bimetallic composite screw/barrel has excellent wear resistance and corrosion resistance, which can cope with the wear of high-hardness pigments; the 5-section precise temperature control system and vacuum exhaust device can avoid PA66 carrier decomposition and remove moisture and volatile substances, ensuring the quality of the masterbatch; the modular screw design can be flexibly configured according to the PA66 masterbatch processing characteristics, improving the mixing and dispersing effect.

Application Effect: After using the HTS PLUS series extruders, the customer’s PA66 masterbatch has good dispersibility, and the automotive connector parts have uniform coloring and no color spots; the masterbatch can withstand 260℃ high temperature without decomposition and discoloration, and has good compatibility with PA66 raw materials; the service life of the screw/barrel has increased from 6 meses para 18 meses, reducing the maintenance cost by 60%; the production efficiency has increased from 300kg/h to 800kg/h, and the product qualification rate has increased from 92% para 99%. The customer’s PA66 masterbatch has successfully entered the supply chain of a well-known automotive parts manufacturer.

6.3 Caso 3: Application of HTE Series in Cost-Effective Film Masterbatch Processing

Customer Background: A small and medium-sized masterbatch manufacturer in Zhejiang, China, mainly produces film masterbatch, focusing on the packaging film field. The customer needs to produce PE film masterbatch (conteúdo de pigmento 40%) for food packaging films. The masterbatch requires good transparency, coloração uniforme, e baixo custo de produção. The customer’s original equipment has problems such as high energy consumption, unstable product quality, and low production efficiency, which cannot meet the market competition needs.

Solução: Zhuoyue recommends the HTE series twin-screw extruders (screw diameter 50mm) for the customer. This series integrates high performance and cost-effectiveness, adopts high-efficiency energy-saving motors and optimized screw structures, which can reduce energy consumption by 18%-25%; the precise temperature control system ensures that the PE carrier is fully melted, avoiding affecting the transparency of the masterbatch; the enhanced mixing elements ensure uniform coloring of the masterbatch, and the stable performance ensures batch consistency; the reasonable price and low maintenance cost can help the customer reduce production costs.

Application Effect: After using the HTE series extruders, the customer’s PE film masterbatch has good transparency and uniform coloring, and the food packaging films produced have smooth surface and no color spots, which meets the food packaging standards; the energy consumption per ton of masterbatch has decreased by 20%, and the production efficiency has increased from 150kg/h to 400kg/h; the product qualification rate has increased from 90% para 98%, and the production cost has decreased by 15%. The customer’s market competitiveness has been significantly improved, and the order volume has increased by 40% within half a year. The customer has purchased 4 sets of HTE series extruders to expand production scale.

6.4 Caso 4: Application of ZTE Series in Small-Batch Multi-Variety Ordinary Masterbatch Processing

Customer Background: A small masterbatch manufacturer in Shandong, China, mainly produces small-batch multi-variety ordinary masterbatch (PE/PP color masterbatch, black masterbatch, white masterbatch), focusing on the local plastic product processing market. The customer has limited budget, small production scale, and needs to produce multiple types of masterbatch with small batches (50-100kg per batch). The customer’s requirements for the equipment are simple operation, baixo custo de manutenção, and strong adaptability.

Solução: Zhuoyue recommends the ZTE series twin-screw extruders (screw diameter 35mm) for the customer. This series has excellent cost performance, simple structure and easy operation, which is suitable for operators with little experience; the modular screw design can be flexibly adjusted according to different types of masterbatch, with strong adaptability; the wear-resistant screw/barrel and stable temperature control system can meet the basic processing requirements of ordinary masterbatch; the low energy consumption and low maintenance cost can help the customer reduce the initial investment and daily operation costs.

Application Effect: After using the ZTE series extruders, the customer can flexibly produce multiple types of ordinary masterbatch, and the product quality meets the basic requirements of local plastic product manufacturers; the equipment operation is simple, and the operator can master it quickly; the maintenance cost is low, and the annual maintenance cost is less than 5000 yuan; the production efficiency can meet the small-batch production needs (50-200kg/h). The ZTE series extruders have helped the customer stabilize the local market and lay a foundation for future expansion.

7. Future Development Trend of Masterbatch and Twin-Screw Extrusion Technology

With the continuous development of the global plastics industry, the upgrading of environmental protection policies and the diversification of downstream market demand, the masterbatch industry and twin-screw extrusion technology are facing new development opportunities and challenges. The future development trend will focus on environmental protection, funcionalização, intelligence and high efficiency, and Zhuoyue will continue to focus on technological innovation, keep up with the industry trend, and provide more advanced and efficient processing solutions for masterbatch manufacturers.

7.1 Development Trend of Masterbatch Industry

7.1.1 In-depth Development of Environmental Protection and Low Toxicity.

With the strengthening of global environmental protection awareness and the strictness of environmental protection policies (such as the European Union’s REACH directive, China’s “double carbon” goal), environmental protection masterbatch will become the mainstream of the market. The future environmental protection masterbatch will focus on non-toxic, inofensivo, low-volatile, degradable and recyclable, e pigmentos tóxicos e prejudiciais (como pigmentos de metais pesados) and additives will be completely eliminated. Por exemplo, water-based masterbatch, bio-based masterbatch and recyclable masterbatch will have broad market prospects. Ao mesmo tempo, the recycling of masterbatch waste will also become an important development direction, which can reduce resource waste and environmental pollution.

7.1.2 Functional Integration and High Performance.

With the diversification of downstream product requirements, masterbatch will develop towards functional integration, that is, integrating multiple functions (such as coloring, retardador de chama, antiestático, antibacteriano, UV-resistant) into one masterbatch, which can reduce the addition amount of masterbatch, simplify the processing process, and reduce production costs. Por exemplo, new energy vehicle masterbatch will integrate high temperature resistance, retardador de chama, antistatic and other functions; medical masterbatch will integrate non-toxic, antibacteriano, high transparency and other functions. Além disso, high-performance masterbatch (such as high-concentration, high-dispersibility, high-temperature resistant, corrosion-resistant masterbatch) will be more widely used in high-end fields such as aerospace, precision electronics and new energy.

7.1.3 Customization and Personalization.

With the upgrading of downstream market demand, the customization and personalization of masterbatch will become more and more prominent. Different downstream manufacturers have different requirements on masterbatch (such as color, concentração, função, carrier type), and masterbatch manufacturers need to provide personalized customization solutions according to the specific needs of customers. Por exemplo, according to the color sample provided by the customer, customize the masterbatch with matching color; according to the special use environment of the product, customize the masterbatch with targeted functions. This requires masterbatch manufacturers to have strong R&D capabilities and flexible production capacity.

7.2 Development Trend of Twin-Screw Extrusion Technology

7.2.1 Intelligence and Automation Upgrading.

The future twin-screw extruders will develop towards higher intelligence and automation. The intelligent control system will integrate AI, big data, Internet of Things and other technologies, which can realize real-time monitoring, automatic parameter adjustment, fault early warning, predictive maintenance and production data analysis of the extrusion process. Por exemplo, the AI system can automatically adjust the screw speed, extrusion temperature and feeding speed according to the raw material performance and processing effect, ensuring the stability of product quality; the Internet of Things technology can realize the interconnection of multiple extruders, realizing centralized management and intelligent scheduling of the production line; the big data system can analyze the production data, optimize the processing parameters and formula, and improve production efficiency and product quality.

7.2.2 High Efficiency, Energy Saving and Environmental Protection.

High efficiency, energy saving and environmental protection will continue to be the key development direction of twin-screw extrusion technology. The future extruders will adopt more advanced screw structures, high-efficiency energy-saving motors and heating/cooling systems, which can further reduce energy consumption and improve production efficiency. Por exemplo, the optimized screw structure can reduce the shear loss and improve the conveying efficiency; the high-efficiency energy-saving motor can reduce the energy consumption by 25%以上 compared with the traditional motor; the closed structure and waste gas treatment system can reduce the emission of dust and volatile substances, meeting the higher environmental protection requirements.

7.2.3 High Performance and Wear Resistance.

With the development of high-concentration, high-hardness masterbatch (como masterbatch de enchimento, masterbatch de plástico de engenharia), os requisitos de desempenho e resistência ao desgaste das extrusoras de rosca dupla serão maiores. As futuras extrusoras adotarão materiais mais resistentes ao desgaste de alto desempenho (como novas ligas de aço, materiais cerâmicos) e tecnologias avançadas de fabricação (como revestimento a laser, compósito bimetálico), o que pode melhorar significativamente a resistência ao desgaste e à corrosão do parafuso e do cilindro, prolongar a vida útil do equipamento. Ao mesmo tempo, as extrusoras serão equipadas com caixas de engrenagens de maior torque e elementos de mistura mais avançados, which can provide stronger shear force and kneading force, atendendo às necessidades de processamento de masterbatch de alto desempenho.

7.2.4 Modularização e Flexibilidade.

Modularização e flexibilidade se tornarão uma importante tendência de desenvolvimento de extrusoras de rosca dupla. As futuras extrusoras adotarão um design modular mais perfeito, e o parafuso, barril, die head and other components can be freely combined and replaced according to the type of masterbatch and processing requirements, which can improve the adaptability of the equipment and reduce the investment cost of the customer. Por exemplo, when producing different types of masterbatch, only the corresponding screw elements and die head need to be replaced, without replacing the entire extruder. Além disso, the small and medium-sized modular extruders will be more popular, which can meet the small-batch and multi-variety production needs of small and medium-sized manufacturers.

7.3 Zhuoyue’s Layout in the Future Development Trend

Facing the future development trend of the masterbatch industry and twin-screw extrusion technology, Zhuoyue will focus on technological innovation and product upgrading, e faça o layout nos seguintes aspectos: primeiro, fortalecer o R&D de tecnologia de extrusão inteligente, IA integrada, tecnologias de big data e Internet das Coisas no design da extrusora, lançar extrusoras mais inteligentes e automáticas, e ajudar os clientes a realizar uma produção inteligente; segundo, aumentar o R&D investimento em materiais resistentes ao desgaste de alto desempenho e tecnologias de economia de energia, desenvolver mais eficiente, extrusoras economizadoras de energia e resistentes ao desgaste, reduzir o custo de produção e o impacto ambiental dos clientes; terceiro, fortalecer o R&D de soluções personalizadas, de acordo com as necessidades personalizadas de diferentes clientes, fornecer soluções direcionadas de configuração e processamento de extrusoras, e melhorar a satisfação do cliente; quarto, expandir o R&D da tecnologia de processamento de masterbatch de proteção ambiental, lançar extrusoras adequadas para masterbatch à base de água, bio-based masterbatch and recyclable masterbatch processing, and help the masterbatch industry achieve green development.

8. Conclusão

Masterbatch, as the core material of plastic coloring and functional modification, plays an indispensable role in the global plastics industry. Twin-screw extrusion technology, as the key processing technology of masterbatch, directly determines the quality, production efficiency and market competitiveness of masterbatch products. With the continuous development of the masterbatch industry towards environmental protection, funcionalização, high concentration and intelligence, the requirements for twin-screw extruders are becoming higher and higher.

Zhuoyue, as a professional manufacturer of twin-screw extruders, has launched a full series of extruders (HTS BÁSICO/PLUS/SUPER, ZTE, HTE) specially designed for masterbatch processing, each series has its own unique performance characteristics and targeted adaptation scenarios, which can provide personalized and efficient processing solutions for masterbatch manufacturers of different scales and fields. These extruders have the advantages of excellent mixing and dispersing effect, controle preciso de temperatura, high wear resistance, alta eficiência de produção, energy saving and environmental protection, intelligent control and wide application range, which have been fully verified in many practical application cases.

This article comprehensively elaborates on the core knowledge of masterbatch, the principle and process of twin-screw extrusion technology, the performance advantages of Zhuoyue’s full series of extruders, the application fields of masterbatch, common problems and solutions in processing, practical application cases, and the future development trend. It is hoped that this article can provide comprehensive and professional reference for masterbatch manufacturers, processing technicians, industry practitioners and relevant researchers.

No futuro, Zhuoyue will continue to adhere to the concept of technological innovation and customer-oriented, keep up with the development trend of the industry, continuously upgrade products and technologies, provide more advanced, efficient and environmentally friendly twin-screw extrusion solutions, and work together with masterbatch manufacturers around the world to promote the high-quality development of the masterbatch industry.