Masterbatch Gevorderde Twin-Screw Ekstrusie-tegnologie-toepassings en omvattende verwerkingsoplossings

1. Oorsig van Masterbatch-industrie en kernkennis

1.1 Huidige situasie en ontwikkelingstendens van Masterbatch-industrie

Meesterbatch, ook bekend as kleurmeesterbatch of kleurkonsentraat, is 'n nuwe soort plastiese kleurmateriaal met hoë konsentrasie, hoë verspreibaarheid en gerieflike gebruik. Dit word gemaak deur pigmente of kleurstowwe eenvormig te versprei, draers en bymiddels in 'n spesifieke verhouding deur professionele meng- en ekstrusiegranuleringstegnologie. In vergelyking met die tradisionele direkte kleurmetode (pigmente direk by plastiese grondstowwe te voeg), masterbatch het die voordele van gerieflike gebruik, eenvormige kleur, stabiele prestasie, omgewingsbeskerming en energiebesparing, wat geleidelik die tradisionele kleurmetode vervang het en die hoofstroom-kleuroplossing in die plastiekbedryf geword het.

In onlangse jare, aangedryf deur die vinnige ontwikkeling van stroomaf nywerhede soos verpakking, motor, tekstiele, elektronika, konstruksie en huishoudelike toestelle, die wêreldwye masterbatch-mark het 'n bestendige en vinnige groeitendens getoon. Volgens relevante industrie data, die globale meesterbatch-markgrootte het oorskry 30 miljard Amerikaanse dollars, en dit sal na verwagting 'n saamgestelde jaarlikse groeikoers van handhaaf 6%-8% in die volgende vyf jaar. Onder hulle, Asië-Stille Oseaan is die wêreld se grootste meesterbatch produksie en verbruik mark, verantwoordelik vir meer as 60% van die globale markaandeel, hoofsaaklik as gevolg van die vinnige ontwikkeling van die plastiekbedryf in China, Indië en ander lande, die voortdurende verbetering van industriële ondersteuningskapasiteit, en die toenemende vraag na hoë gehalte, funksionele en omgewingsvriendelike masterbatch produkte.

China, as die wêreld se grootste meesterbatch-produsent en -verbruiker, het 'n groot markaanvraag en 'n volledige industriële ketting. Die jaarlikse uitset en verbruik van masterbatch groei teen 'n dubbelsyferkoers, veral op die gebied van nuwe energievoertuie, groen verpakking, hoë-end tekstiele en mediese toestelle, die vraag na hoëprestasie-meesterbatch (soos hoë-temperatuurbestande meesterbatch, vlamvertragende meesterbatch, meestergroep vir omgewingsbeskerming) toon 'n plofbare groeineiging. Met die voortdurende verbetering van globale omgewingsbeskermingsbeleide (soos die verbod op giftige en skadelike pigmente) en die opgradering van verbruikersvraag na hoëgehalte plastiekprodukte, die masterbatch-industrie ontwikkel geleidelik na hoë konsentrasie, hoë verspreibaarheid, funksionalisering, omgewingsbeskerming en intelligensie.

Die hoofontwikkelingstendense van die masterbatch-industrie word in vier aspekte weerspieël: eers, omgewingsbeskerming en lae toksisiteit. Met die versterking van omgewingsbeskermingsbewustheid en die strengheid van omgewingsbeskermingsbeleide, nie-giftig, skadeloos, lae-vlugtige en afbreekbare meesterbatch vir omgewingsbeskerming sal die hoofstroom van die mark word, en giftige en skadelike pigmente (soos swaarmetaalpigmente) sal geleidelik uitgeskakel word; tweede, funksionalisering. Benewens inkleur, masterbatch ontwikkel ook na funksionele integrasie, soos vlamvertragende meesterbatch, antistatiese meesterbatch, antibakteriese meesterbatch, UV-bestande meesterbatch, wat aan die spesiale gebruiksvereistes van stroomaf produkte kan voldoen; derde, hoë konsentrasie en hoë dispergeerbaarheid. Hoë-konsentrasie meesterbatch kan die bykomende hoeveelheid verminder, produksiekoste te verminder, en hoë verspreibaarheid kan eenvormige kleur van plastiekprodukte verseker, vermy kleurkolle en kleurverskil, wat die sleutel tot die verbetering van die kwaliteit van die produk is; vierde, intelligensie en outomatisering van verwerking. Meesterbatch-verwerking vereis streng beheer van menguniformiteit, temperatuur en ander parameters. Intelligent, outomatiese dubbelskroef-ekstrusie-produksielyne sal die hoofstroom word, real-time monitering te realiseer, outomatiese parameteraanpassing en massaproduksie, produksiedoeltreffendheid en produkkonsekwentheid te verbeter.

As die kern verwerking toerusting van masterbatch, dubbelskroef-ekstruders speel 'n deurslaggewende rol in die ontwikkeling van die masterbatch-industrie. Meesterbatch-menging het streng vereistes vir die meng- en dispergeer-effek, temperatuurbeheer en produksiedoeltreffendheid van ekstrueerders. Zhuoyue se volledige reeks ekstrueerders (HTS BASIC/PLUS/SUPER, ZTE, HTE) is spesiaal ontwerp vir masterbatch-verwerking, met doelgerigte prestasievoordele, wat effektief aan die verwerkingsbehoeftes van verskillende soorte meesterbatch kan voldoen en vervaardigers kan help om produkkwaliteit en produksiedoeltreffendheid te verbeter.

1.2 Kernsamestelling en werkbeginsel van Masterbatch

Masterbatch bestaan ​​uit drie basiese elemente: pigmente of kleurstowwe, draers en bymiddels. Die verhouding en prestasie van elke element bepaal direk die kwaliteit en gebruikseffek van meesterbatch. Om die kernsamestelling en werkbeginsel van masterbatch te verstaan ​​is die basis vir die bemeestering van sy verwerkingstegnologie en die keuse van toepaslike ekstrusietoerusting.

1.2.1 Pigmente of kleurstowwe: Die kernkleurkomponent

Pigmente of kleurstowwe is die kernkomponente wat meesterbatch-kleurprestasie gee, rekeningkunde vir 10%-80% van die meesterbatch samestelling (die spesifieke verhouding hang af van die tipe pigment, kleurvereistes en meesterbatch-konsentrasie). Pigmente word verdeel in organiese pigmente en anorganiese pigmente: organiese pigmente het helder kleure, hoë kleursterkte, goeie deursigtigheid, maar swak hittebestandheid en weerbestandheid, hoofsaaklik gebruik in lae-temperatuur verwerking plastiek (soos PE, PP) en produkte met hoë kleurvereistes (soos tekstiele, verpakking films); anorganiese pigmente het goeie hittebestandheid, weerbestandheid en chemiese stabiliteit, maar lae kleursterkte en swak deursigtigheid, hoofsaaklik gebruik in hoë-temperatuur verwerking plastiek (soos ingenieursplastiek) en buitelugprodukte (soos boumateriaal, motor buite onderdele).

Kleurstowwe verskil van pigmente. Kleurstowwe het goeie oplosbaarheid in plastiese grondstowwe, helder kleure en hoë deursigtigheid, maar swak hittebestandheid en ligweerstand, hoofsaaklik gebruik in deursigtige plastiek produkte (soos PET-bottels, PC velle). Die keuse van pigmente of kleurstowwe moet gebaseer wees op die tipe plastiek grondstowwe (verwerkingstemperatuur), produk gebruik omgewing (binne/buitelug), kleur vereistes (kleur helderheid, deursigtigheid) en omgewingsbeskermingsvereistes, om te verseker dat die meesterbatch stabiele kleurprestasie het en aan die gebruiksvereistes van stroomaf produkte voldoen.

1.2.2 Draers: Die Dispersie- en Adhesie-komponent

Draers is die matriks van masterbatch, rekeningkunde vir 10%-80% van die meesterbatch samestelling, speel hoofsaaklik die rol om pigmente/kleurstowwe te versprei en aan plastiese grondstowwe te kleef. Die draer moet goeie verenigbaarheid hê met beide pigmente/kleurstowwe en die teiken plastiek grondstowwe (die plastiek grondstowwe wat gekleur moet word), anders sal dit die dispergeerbaarheid van pigmente en die kleureffek van produkte beïnvloed. Algemene draermateriaal sluit poliëtileen in (PE), polipropileen (PP), polivinielchloried (PVC), poliamied (PA), poliëtileentereftalaat (PET), ens., wat gekies word volgens die tipe teiken plastiek grondstowwe: byvoorbeeld, PE draer word gebruik vir PE plastiek kleuring, PP-draer word gebruik vir PP-plastiekkleuring, en PA-draer word gebruik vir die ingenieurswese van plastiese PA-kleuring.

Die draer moet ook goeie verwerkingsvloeibaarheid hê, wat bevorderlik is vir die eenvormige verspreiding van pigmente tydens ekstrusieverwerking en die vermenging van meesterbatch met doelplastiek grondstowwe. Daarby, die smeltpunt en verwerkingstemperatuur van die draer moet ooreenstem met of effens laer as dié van die teiken plastiek grondstowwe, om die ontbinding van die draer of die teikenplastiek tydens verwerking te vermy.

1.2.3 Bymiddels: Die hulp funksionele komponent

Bymiddels is hulpkomponente wat bygevoeg word om die verwerkingsprestasie te verbeter, verspreibaarheid en gebruik prestasie van masterbatch, rekeningkunde vir 1%-10% van die meesterbatch samestelling. Die tipe en dosis bymiddels word bepaal volgens die tipe meesterbatch en verwerkingsvereistes. Algemene bymiddels sluit in:

• Dispergeermiddels: Die belangrikste toevoeging in masterbatch, wat die oppervlakspanning van pigmente kan verminder, voorkom pigmentagglomerasie, en maak pigmente eenvormig versprei in die draer. Algemene dispergeermiddels sluit poliëtileenwas in, polipropileen was, steariensuur, kalsiumstearaat, ens. Die byvoeging van dispergeermiddels kan die dispergeerbaarheid van masterbatch aansienlik verbeter, verseker eenvormige kleur van produkte, en verminder die slytasie van ekstrusietoerusting.
• Versoenbaar maakers: Word gebruik om die verenigbaarheid tussen pigmente en draers te verbeter, en tussen masterbatch en teiken plastiek grondstowwe. Byvoorbeeld, wanneer die draer en teikenplastiek swak verenigbaarheid het (soos PE draer en PA plastiek), versoenbaar maak (soos maleïenanhidried geënte poliëtileen) kan bygevoeg word om die bindingskrag tussen hulle te verbeter, vermy die skeiding van meesterbatch en teikenplastiek tydens verwerking, en die meganiese eienskappe van produkte te verbeter.
• Hitte stabiliseerders: Word gebruik om die ontbinding van pigmente te voorkom, draers en teikenplastiek tydens hoë-temperatuur ekstrusie verwerking. Algemene hittestabiliseerders sluit loodsoute in, kalsium-sink stabiliseerders, organiese tin stabiliseerders, ens., wat gekies word volgens die verwerkingstemperatuur en omgewingsbeskermingsvereistes.
• Ligte stabiliseerders en antioksidante: Word gebruik om die weerbestandheid en verouderingsweerstand van masterbatch en gekleurde plastiekprodukte te verbeter, voorkom dat die kleur vervaag en prestasie-agteruitgang van produkte onder sonlig en suurstof, en verleng die dienslewe van produkte.
• Smeermiddels: Word gebruik om die wrywing tussen materiale en ekstrusietoerusting te verminder (skroef, vat, kop dood), verbeter verwerkingsvloeibaarheid, energieverbruik te verminder, en vermy materiaal wat aan toerusting kleef, wat bevorderlik is vir die gladde vordering van ekstrusieverwerking.

1.2.4 Werksbeginsel van Masterbatch

Die werkbeginsel van masterbatch is gebaseer op die eenvormige verspreiding van hoë-konsentrasie pigmente in die draer. Tydens die verwerking van plastiekprodukte, 'n klein hoeveelheid meesterbatch (gewoonlik 1%-5%) word met ongekleurde plastiekgrondstowwe gemeng. Onder die werking van hoë temperatuur en skuifkrag tydens ekstrusie of spuitgiet, die draer van die masterbatch smelt en meng met die teiken plastiek grondstowwe, en die eenvormig verspreide pigmente word vrygestel en eenvormig versprei in die teikenplastiekmatriks, sodoende die doel bereik om plastiekprodukte in te kleur. Die sleutel van hierdie proses is dat die pigmente in die masterbatch eenvormig versprei moet word sonder agglomerasie, anders sal dit kleurkolle veroorsaak, kleurverskil en ander defekte in die gekleurde produkte.

1.3 Algemene klassifikasie van Masterbatch

Meesterbatch kan volgens verskillende klassifikasiestandaarde in verskillende tipes verdeel word, soos kleurtipe, tipe draer, aansoek veld, funksionele tipe, ens. Die korrekte klassifikasie help om die prestasie-eienskappe en verwerkingsvereistes van masterbatch beter te verstaan, en toepaslike ekstrusietoerusting en verwerkingstegnieke te kies.

1.3.1 Klassifikasie volgens kleurtipe

Volgens die tipe kleurkomponent, masterbatch kan in kleur masterbatch verdeel word, wit masterbatch en swart masterbatch.

• Kleur Masterbatch: Die mees algemene tipe meesterbatch, wat organiese of anorganiese pigmente van verskillende kleure gebruik (soos rooi, geel, blou, groen, oranje) as kleurkomponente, en word gebruik vir die kleur van plastiekprodukte van verskillende kleure. Die kleursterkte, kleurhelderheid en verspreibaarheid van kleurmeesterbatch is die sleutelaanwysers om die kwaliteit daarvan te meet.
• Wit Meesterbatch: Gebruik titaandioksied (TiO2) as die hoofkleurkomponent, it is used for whitening plastic products or as a base color for light-colored masterbatch. The whiteness, covering power and dispersibility of white masterbatch are the key indicators. Titanium dioxide has high hardness, which has high requirements on the wear resistance of extrusion equipment.
• Black Masterbatch: Using carbon black as the main coloring component, it is used for black coloring of plastic products. Carbon black has good UV resistance and weather resistance, and can also improve the mechanical properties of plastic products. 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 meesterbatch, PA meesterbatch, PET meesterbatch, ens.

• PE Masterbatch: Gebruik PE as die draer, dit is geskik vir die kleur van PE-plastiekprodukte (soos PE-films, PE pype, PE spuitgiet dele). Dit het goeie verenigbaarheid met PE-grondstowwe, goeie verwerkingsvloeibaarheid en eenvormige kleur.
• PP Masterbatch: Gebruik PP as die draer, dit is geskik vir die kleur van PP-plastiekprodukte (soos PP-vesels, PP spuitgiet dele, PP velle). Dit het goeie hittebestandheid en is geskik vir hoë-temperatuur verwerking van PP.
• PVC Masterbatch: Gebruik PVC as die draer, dit is geskik vir die kleur van PVC-plastiekprodukte (soos PVC-pype, PVC profiele, PVC films). Dit moet ooreenstem met PVC-hittestabiliseerders om PVC-ontbinding tydens verwerking te vermy.
• Engineering Plastic Masterbatch: Die gebruik van ingenieursplastiek (PA, PC, PBT, ens.) as draers, it is suitable for coloring engineering plastic products (soos motoronderdele, elektriese komponente). It has good heat resistance and compatibility with engineering plastics, and has high requirements on extrusion processing equipment.

1.3.3 Klassifikasie volgens toepassingsveld

According to the application field of masterbatch, it can be divided into fiber masterbatch, film masterbatch, blow molding masterbatch, extrusion masterbatch, injection molding masterbatch, ens., which correspond to the five major application fields of masterbatch.

• Fiber Masterbatch: Used for coloring chemical fibers (such as polyester fiber, nylon fiber), which is used in carpets, tekstiele, cushions and other products. 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-laag films), wat hoë deursigtigheid en eenvormige kleur vereis, en geen kleur kolle of strepe op die filmoppervlak nie.
• Blow Moulding Masterbatch: Word gebruik vir die kleur van blaasvormprodukte (soos mediese en kosmetiese houers, smeerolie- en verfhouers), wat goeie verwerkingsvloeibaarheid en eenvormige kleur vereis, en geen vervorming of kleurverskil van die houer nie.
• Ekstrusie Masterbatch: Word gebruik vir die kleur van ekstrusieprodukte (soos lakens, pype, drade en kabels), wat goeie dimensionele stabiliteit en eenvormige kleur vereis, en geen kleurverskil op die produkoppervlak nie.
• Spuitgiet Masterbatch: Word gebruik vir die kleur van spuitgietprodukte (soos motoronderdele, elektroniese produkte, konstruksie materiaal, huishoudelike toestelle, meubels, speelgoed), wat hoë verspreibaarheid en stabiele werkverrigting vereis, en geen kleurverskil tussen groepe produkte nie.

1.3.4 Klassifikasie volgens funksionele tipe

According to the additional functions of masterbatch, it can be divided into ordinary masterbatch (only coloring function) and functional masterbatch (inkleur + additional functions). Functional masterbatch is the development trend of the industry, and common types include flame-retardant masterbatch, antistatiese meesterbatch, antibakteriese meesterbatch, UV-bestande meesterbatch, toughening masterbatch, ens. 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, ekstrusie, verkoeling, 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, dubbelskroef-ekstruderingstegnologie het die voordele van sterk meng- en verspreidingskapasiteit, presiese temperatuurbeheer, kort verblyftyd, hoë produksiedoeltreffendheid en sterk aanpasbaarheid by grondstowwe, wat die sleutelprobleme van masterbatch-verwerking effektief kan oplos (soos pigmentagglomerasie, ongelyke vermenging, lae produksiedoeltreffendheid) en verseker die kwaliteit van masterbatch produkte.

Meesterbatch-menging is een van die hooftoepassings van dubbelskroef-ekstruders. Die kwaliteit van meesterbatch word direk bepaal deur die werkverrigting van die dubbelskroef-ekstruder en die rasionaliteit van die verwerkingsproses. Die sleutelvereistes van masterbatch-verwerking vir dubbelskroef-ekstruders is: sterk meng- en verspreide effek (om eenvormige verspreiding van pigmente te verseker), presiese temperatuurbeheer (om pigmentafbraak en draerafbraak te vermy), toepaslike skuifkrag (om pigmentagglomerate te breek sonder om pigmentdeeltjies te beskadig), hoë produksiedoeltreffendheid (massaproduksiebehoeftes te voorsien) en goeie slytasieweerstand (om aan te pas by die dra van hoë-hardheidspigmente soos titaandioksied en koolstofswart).

2.1 Verwerkingsprobleme van Masterbatch en vereistes vir ekstrusietoerusting

Alhoewel dubbelskroef-ekstruderingstegnologie geskik is vir meesterbatch-verwerking, as gevolg van die besonderheid van masterbatch samestelling (hoë pigment inhoud, maklike agglomerasie van pigmente) en verwerkingsvereistes (eenvormige verspreiding, stabiele prestasie), daar is nog baie probleme in die werklike verwerking. Die belangrikste verwerkingsprobleme en ooreenstemmende vereistes vir ekstrusietoerusting is soos volg:

2.1.1 Pigmentagglomerasie en swak verspreidbaarheid

Pigmente (veral anorganiese pigmente soos titaandioksied en koolstofswart) het sterk polariteit en groot spesifieke oppervlakte, wat maklik is om in groot deeltjies te agglomereer tydens berging en vermenging. As die agglomerate nie ten volle gebreek en versprei kan word tydens ekstrusieverwerking nie, die meesterbatch sal swak verspreibaarheid hê, en die gekleurde plastiekprodukte sal kleurkolle hê, kleurstrepe en ongelyke kleuring, wat die kwaliteit van die produk ernstig sal beïnvloed. Dit is die mees algemene en sleutelprobleem in masterbatch-verwerking.

Dit vereis dat die ekstrusietoerusting sterk meng- en verspreidingskapasiteit en toepaslike skuifkrag moet hê. Die dubbelskroef-ekstruder moet 'n ineenlopende mede-roterende struktuur aanneem, en die skroef moet toegerus wees met voldoende mengelemente en skeerelemente om sterk skuifkrag en kniekrag tydens rotasie op te wek, which can fully break the pigment agglomerates and make the pigments uniformly dispersed in the carrier. Daarby, 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 (soos 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, verkleuring), and the carrier will degrade (resulting in reduced mechanical properties of the masterbatch). This is another key difficulty in masterbatch processing.

This requires the extrusion equipment to have precise temperature control capacity and short residence time. The barrel of the extruder should be divided into multiple temperature control sections, and the temperature of each section should be precisely controlled within the optimal range (usually 150-220℃ for ordinary masterbatch, 200-280℃ for engineering plastic masterbatch), with a temperature control precision of ±1℃. The screw structure should be optimized to shorten the residence time of the material in the extruder (gewoonlik 1-3 minute), avoiding long-term contact between the material and high temperature.

2.1.3 Wear of Screw and Barrel Caused by High-Hardness Pigments

Inorganic pigments such as titanium dioxide and carbon black have high hardness (Mohs hardness 5-7), which will cause serious wear to the screw and barrel of the extruder during extrusion processing. As die skroef en loop swak slytweerstand het, hulle sal vinnig gedra word, resulting in reduced shear force and mixing capacity of the extruder, affecting the dispersibility of the masterbatch and reducing the service life of the equipment.

Dit vereis dat die skroef en loop van die ekstruder gemaak word van hoë kwaliteit slytvaste materiale en verwerk word deur gevorderde vervaardigingstegnologie. Byvoorbeeld, the screw and barrel can be made of imported wear-resistant alloy steel, and undergo bimetallic composite treatment or laser cladding treatment, which can greatly improve the wear resistance and corrosion resistance of the screw and barrel, and adapt to the processing of masterbatch with high-hardness pigments.

2.1.4 Instability of Product Quality Between Batches

Masterbatch processing requires strict control of various parameters (such as formula ratio, mengtyd, extrusion temperature, skroef spoed, voeding spoed). If the parameters fluctuate, the quality of the masterbatch (such as concentration, verspreibaarheid, tinting strength) will be unstable, resulting in color difference between batches of colored products, which will affect the reputation of the manufacturer.

This requires the extrusion equipment to have intelligent control capacity and stable performance. The extruder should be equipped with a PLC intelligent control system, which can realize precise control of feeding speed, skroef spoed, 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, lood en kompressieverhouding ontwerp, and the screw should be equipped with sufficient conveying elements to ensure the smooth conveying of materials. Daarby, 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, premixing, voeding, smelt, meng en skeer, ekstrusie, verkoeling, granulasie, sifting en verpakking. The core purpose is to uniformly disperse pigments, carriers and additives to form high-quality masterbatch granules. Die spesifieke werkbeginsel en prosesvloei is soos volg:

2.2.1 Raw Material Pretreatment

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, carriers, bymiddels (dispergeermiddels, versoenbaar maak, heat stabilizers, ens.). The pretreatment steps are as follows:

• Drying Treatment: Some pigments (such as organic pigments) and carriers (soos PA, PET) hoë waterabsorpsie hê. As die voginhoud te hoog is, it will cause bubbles, agglomeration and other defects in the masterbatch during extrusion processing, and even cause hydrolytic degradation of the carrier. Daarom, the raw materials must be dried before processing. The drying temperature and time are determined according to the type of raw material: byvoorbeeld, organic pigments are dried at 60-80℃ for 2-4 ure, PE/PP carriers are dried at 80-100℃ for 3-5 ure, and PA carriers are dried at 100-120℃ for 6-8 ure. 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 gaas, 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, stof) during production and transportation. Impurities not only affect the quality of the masterbatch, maar dra ook die skroef en loop van die ekstruder, en selfs toerusting verstopping veroorsaak. Daarom, the raw materials must be filtered and removed before use, using a filter screen with appropriate mesh size to remove impurities.

2.2.2 Voorvermenging

Premixing is the key step to improve the mixing and dispersing effect of masterbatch. Volgens die formule verhouding, 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, mengtyd en mengtemperatuur. Die mengspoed is oor die algemeen 800-1200 rpm, die mengtyd is 5-10 minute, en die mengtemperatuur word op 40-60 ℃ beheer. The appropriate mixing temperature can improve the adhesion of additives (soos dispergeermiddels) to the carrier and pigments, promoting uniform mixing. For masterbatch with high pigment content (soos 50% hierbo), 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 Voer en vervoer

Die voorafgemengde mengsel word deur 'n skroefvoerder of 'n bandtoevoerder na die voerbak van die dubbelskroef-ekstruder gestuur. Die toevoertoestel van die ekstruder is gewoonlik toegerus met 'n frekwensie-omskakelingspoedreguleringsfunksie, 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. Daarby, the feeding port of the extruder should be smooth, without dead corners, to avoid material sticking and accumulation.

2.2.4 Smelt, Mixing and Shearing

Die materiaal wat die ekstrusieholte van die dubbelskroef-ekstruder binnegaan, word voortdurend deur die roterende skroewe vorentoe gedruk. Die ekstrusieholte bestaan ​​uit 'n skroef en 'n loop, en die volume van die ekstrusieholte neem geleidelik langs die asrigting af. Wanneer die skroewe draai, die materiaal word geleidelik saamgepers onder die werking van die skroewe en die loop, en die druk in die ekstrusieholte neem geleidelik toe (generally 5-12MPa).

Terselfdertyd, die materiaal word aan sterk skuifkrag en wrywingskrag onderwerp wat deur die relatiewe beweging tussen die skroewe en die loop gegenereer word, asook tussen die skroefvlugte. 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. Die wrywingskrag kan ook 'n sekere hoeveelheid hitte genereer, wat gekombineer word met die eksterne verhitting van die loop (elektriese verwarming of stoom verwarming) to make the carrier gradually melt and plasticize.

Die loop van die ekstruder word gewoonlik verdeel in 4-6 temperatuurbeheerafdelings (voeding afdeling, smeltafdeling, mengafdeling, homogeniserende afdeling, die kopgedeelte), and the temperature of each section is precisely controlled according to the type of masterbatch (tipe draer, pigment type). Byvoorbeeld, 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 (soos om elemente oor te dra, vermenging van elemente, skeer elemente) according to the type of masterbatch. Byvoorbeeld, 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

Die ten volle gesmelt, gemengde en verspreide materiaal word deur die skroewe na die matryskop van die ekstruder gedruk. The die head of the masterbatch extruder is usually equipped with multiple circular die holes (die aantal en grootte van die gate word bepaal volgens die deeltjiegrootte van die meesterbatch). 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, wat aangepas kan word volgens klantbehoeftes).

Die temperatuur van die matryskop is effens laer as dié van die homogeniserende gedeelte, 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 meter, en die afkoeltyd is 2-4 minute. Rapid cooling can make the strip solidify quickly, maintain the shape and size of the strip, and avoid deformation and adhesion.

Daar moet kennis geneem word dat die verkoelingsspoed uniform moet wees. As die afkoelspoed te vinnig is, die interne spanning van die strook sal te groot wees, en die strook sal bros en maklik wees om te breek tydens granulering; as die afkoelspoed te stadig is, die strook sal sag wees en maklik om vas te plak, wat die granulasie-effek beïnvloed. Na afkoeling, die oppervlak van die strook moet droog wees, glad en vry van borrels en krake.

2.2.7 Sny en Granulering

Na afkoeling en stolling, die strook word na 'n granuleerder gestuur vir sny om korrelvormige meesterbatchprodukte te vorm. Die granuleerder is toegerus met 'n roterende mes en 'n vaste mes, en die snyspoed is verstelbaar (oor die algemeen 500-1000 rpm). Die deeltjiegrootte van die meesterbatch word beheer deur die snyspoed en die spoed van die strookvervoer aan te pas. 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 Sifting, 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: kleur (uniformity, consistency with the standard sample), verspreibaarheid (observed by microscope or test piece coloring), concentration (tinting strength test), voginhoud, particle size distribution, ens. 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, model, kleur, concentration, tipe draer, produksie datum, shelf life, manufacturer and other information. The packaged masterbatch should be stored in a dry, koel en geventileerde pakhuis, avoiding direct sunlight and moisture, and the shelf life is generally 6-12 maande.

2.3 Key Factors Affecting Masterbatch Twin-Screw Extrusion Effect

The effect of twin-screw extrusion directly affects the quality of masterbatch (verspreibaarheid, tinting strength, stabiliteit). There are many factors affecting the extrusion effect, hoofsaaklik grondstofeienskappe ingesluit, formule verhouding, voorafmeng effek, 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 gaas), 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.

Daarby, the moisture content of raw materials must be strictly controlled below 0.1%; as die voginhoud te hoog is, it will cause bubbles and agglomeration in the masterbatch. Die suiwerheid van grondstowwe is ook baie belangrik; impurities in raw materials will not only affect the product quality, maar dra ook die skroef en loop van die ekstruder.

2.3.2 Formule verhouding

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 (pigment content 50%-80%) can reduce the addition amount and production cost, but requires better dispersibility; low-concentration masterbatch (pigment content 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 (versoenbaar maak, heat stabilizers, smeermiddels) 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 Voormeng effek

Premixing is the foundation of extrusion processing. The uniformity of premixing directly affects the mixing and dispersing effect of pigments during extrusion. As die voormenging ongelyk is, 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.

Om die voorafmeng effek te verseker, dit is nodig om die mengspoed te beheer (800-1200 rpm), mengtyd (5-10 minute) 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. Daarby, the premixed mixture should be inspected; if there are obvious pigment agglomerates, it should be crushed and remixed.

2.3.4 Ekstrusie parameters

Extrusion parameters are the most important factors affecting the extrusion effect, hoofsaaklik skroefspoed ingesluit, ekstrusie temperatuur en ekstrusie druk.

• Skroef spoed: The screw speed of twin-screw extruders for masterbatch processing generally ranges from 200 aan 800 rpm. Hoe hoër die skroefspoed, hoe groter die skuifkrag en wrywingskrag wat deur die materiale ontvang word, the better the mixing and dispersing effect of pigments, en hoe hoër die produksiedoeltreffendheid. Egter, as die skroefspoed te hoog is, die verblyftyd van die materiaal in die ekstrusieholte is te kort, resulting in incomplete melting of the carrier, insufficient mixing of materials, and uneven dispersibility; as die skroefspoed te laag is, die skuifkrag en wrywingskrag is onvoldoende, the pigment agglomerates cannot be fully broken, en die produksiedoeltreffendheid is laag.
• 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.
• Ekstrusie temperatuur: 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 (tipe draer, pigment type). Die temperatuur van die voerafdeling is laer (slightly higher than the drying temperature of the raw materials), wat hoofsaaklik is om te verhoed dat die materiaal koek en gladde voeding verseker; die temperatuur van die smeltgedeelte is medium, which is mainly to promote the melting and plasticization of the carrier; die temperatuur van die menggedeelte is hoër, wat hoofsaaklik is om die skuif- en mengeffek te verbeter, and promote the uniform dispersion of pigments; die temperatuur van die homogeniserende gedeelte is effens laer as die menggedeelte, wat hoofsaaklik is om die eenvormige temperatuur en viskositeit van die materiale te verseker, en vermy termiese ontbinding; die temperatuur van die matryskopgedeelte is effens laer as die homogeniserende gedeelte, which is to ensure the shaping effect of the strip.
• The temperature control precision should reach ±1℃. Byvoorbeeld, 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.
• Ekstrusie druk: The extrusion pressure of masterbatch twin-screw extrusion generally ranges from 5 to 12MPa. Die druk in die ekstrusieholte word hoofsaaklik deur die kompressieverhouding van die skroef bepaal, die matrysgatgrootte en die skroefspoed. Hoe hoër die ekstrusiedruk, the better the mixing and dispersing effect of materials, and the denser the strip. Egter, as die druk te hoog is, dit sal die energieverbruik en slytasie van die toerusting verhoog, en selfs die dobbelsteenkop laat blokkeer; as die druk te laag is, die materiale kan nie ten volle saamgepers en gemeng word nie, 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, temperatuurbeheer akkuraatheid, slytasie weerstand, conveying capacity and intelligent control capacity. Zhuoyue se volledige reeks ekstrueerders (HTS BASIC/PLUS/SUPER, ZTE, HTE) is spesiaal ontwerp vir masterbatch-verwerking, 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 (hoë pigment inhoud, maklike agglomerasie van pigmente, strict temperature control requirements, high wear resistance requirements) and the diverse needs of manufacturers (different production scales, verskillende meesterbatch tipes, 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, doeltreffende en stabiele produksie:

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, met 'n redelike skroefspoed, lood en kompressieverhouding ontwerp. Die ineenskakeling en rotasie van die tweelingskroewe kan sterk skuifkrag en kniekrag genereer, 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%).

Daarby, the screws of all series of extruders adopt a modular design, which can freely combine different types of screw elements (elemente oor te dra, vermenging van elemente, skeer elemente) according to the type of masterbatch (such as color masterbatch, white masterbatch, black masterbatch) and pigment characteristics. Byvoorbeeld, 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. Die loop is verdeel in 4-6 independent temperature control sections, and the temperature of each section can be precisely adjusted and controlled in real time.

The temperature control system is equipped with a real-time monitoring and alarm function: if the temperature of any section exceeds the set range, the system will issue an alarm prompt in time, and automatically adjust the heating power or start the cooling system to return the temperature to the set range. Daarby, the barrel of the extruder adopts a double-layer jacket design, which can realize rapid heating and cooling, and improve the response speed of temperature control. The die head is also equipped with an independent temperature control device, which ensures the uniform temperature of the die head and the stable shaping of the strip.

3.1.3 High Wear Resistance, Long Service Life

Inorganic pigments such as titanium dioxide and carbon black have high hardness, 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), and undergo bimetallic composite treatment or laser cladding treatment. The surface hardness of the screws and barrels can reach ≥65 HRC (HTS PLUS series, HTE reeks) 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 Hoë produksie doeltreffendheid, 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%. Byvoorbeeld, 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.

Daarby, all Zhuoyue’s extruders adopt high-efficiency motors and energy-saving heating elements, which can reduce energy consumption by 15%-20% in vergelyking met gewone ekstrueerders. 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, Maklike werking en instandhouding

Al Zhuoyue se ekstrueerders neem 'n PLC intelligente beheerstelsel en 'n raakskerm-bewerkingskoppelvlak aan, wat eenvoudig en intuïtief is, maklik om te bedryf. Die stelsel kan verskeie stelle produkformules en verwerkingsparameters stoor (tot 100 stelle), en wanneer verskillende tipes meesterbatch vervaardig word, slegs die ooreenstemmende formule en parameters hoef opgeroep te word, sonder herhaalde ontfouting, wat tyd bespaar en produksiedoeltreffendheid verbeter.

Die stelsel is ook toegerus met 'n intydse moniteringsfunksie, wat die sleutelparameters van die ekstrusieproses kan monitor (soos temperatuur, druk, skroef spoed, voeding spoed) in reële tyd, en teken die produksiedata aan (soos uitset, verwerkingstyd) vir latere navrae en ontleding. Vir die HTS SUPER reeks ekstrueerders, ons verskaf ook 'n wolkbeheerfunksie, wat afgeleë parameteraanpassing kan realiseer, produksiedatamonitering en voorspellende instandhouding van toerusting, intelligente produksiebestuur te realiseer.

Daarby, die ekstrueerders neem 'n redelike strukturele ontwerp aan, wat die onderhoud geriefliker maak. Die skroewe, vate en matrijskoppe kan vinnig uitmekaar gehaal en aanmekaar gesit word, wat die onderhoudstyd en arbeidsintensiteit verminder. Zhuoyue se na-verkope diens span sal professionele installasie verskaf, ingebruikneming en opleidingsdienste vir kliënte, verseker dat kliënte die toerusting glad kan gebruik.

3.1.6 Wye toepassingsreeks, Sterk aanpasbaarheid

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, functional masterbatch (vlamvertragende meesterbatch, antistatiese meesterbatch), and masterbatch with different carriers (PE, PP, PVC, PA, PET, ens.). 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 (vesels, films, blaasvorming, ekstrusie, spuitgiet).

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. Daarby, the extruders can be matched with different auxiliary equipment (soos hoëspoedmengers, droërs, koelers, granuleerders, siftingsmasjiene, verpakking masjiene) to form a complete automatic production line, deurlopende produksie van grondstofvoorbehandeling tot produkverpakking te realiseer.

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, lae geraas, 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.

In terme van strukturele ontwerp, 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. Een van die grootste voordele van hierdie reeks is dat dit buigsame opsies kan bied deur verskillende konfigurasiekombinasies. Kliënte kan verskillende skroefelemente kies, sterf koppe, feeding devices and post-processing equipment according to their own product types and production needs, om 'n produksielyn te vorm wat geskik is vir hul eie behoeftes. 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. Daarby, 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 HTS PLUS-reeks-ekstruders: 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 (soos kalsiumkarbonaat, talcum powder filled masterbatch) and engineering plastic masterbatch (soos 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. Die loop is verdeel in 5-6 temperatuurbeheerafdelings, with a temperature control precision of ±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, vuller meesterbatch, high-concentration color masterbatch (pigment content 50%-70%) and other products. Byvoorbeeld, 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.

Daarby, 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-reeks-ekstruders: 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, LCP), and masterbatch for high-end downstream fields (new energy vehicles, mediese toestelle, 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. Terselfdertyd, 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 (pigment content 70%-80%). Daarby, 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.

Die produksiekapasiteit van die HTS SUPER-reeks-ekstruders wissel van 1000kg/h tot 3000kg/h, which is suitable for large-scale, high-standard masterbatch manufacturers that focus on high-end markets. Byvoorbeeld, 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, mediese houers), 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, wat afgeleë parameteraanpassing kan realiseer, 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-reeks-ekstruders: 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, en produseer hoofsaaklik universele gewone meesterbatch. Hierdie reeks ekstrueerders het uitstekende kosteprestasie, en sy ontwerpte parameters kan voldoen aan die verwerkingsbehoeftes van mees algemene masterbatch-materiale (PE, PP, PVC meesterbatch, lae-konsentrasie kleur meesterbatch, swart masterbatch en wit masterbatch met pigmentinhoud ≤50%).

In terme van strukturele ontwerp, die ZTE-reeks neem 'n dubbelskroef-parallelle ko-roterende struktuur aan, met 'n skroefdeursnee wat wissel van 25mm tot 65mm, en 'n spesifieke wringkrag van 8-11Nm/cm³, wat voldoende skuifkrag en vervoervermoë vir gewone meesterbatch-verwerking kan verskaf. Die skroewe en vate is gemaak van hoë kwaliteit slytvaste legeringstaal met nitrerende behandeling, en die oppervlak hardheid bereik ≥60 HRC, wat aan die slytasievereistes van gewone pigmente kan voldoen (such as organic pigments, lae hardheid anorganiese pigmente) and has a long service life. Die loop is verdeel in 4 temperatuurbeheerafdelings, 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, maklike operasie, 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. Daarby, 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, temperatuurbeheer akkuraatheid) 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 HTE Series Extruders: 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 (pigment content 50%-60%), ordinary functional masterbatch (vlamvertragende meesterbatch, antistatiese meesterbatch) 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, koolstof swart) 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. Terselfdertyd, 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. Die loop is verdeel in 5 temperatuurbeheerafdelings, with a temperature control precision of ±1℃, which can accurately control the processing temperature, avoid material waste caused by overheating or insufficient melting, and further reduce production costs. Daarby, 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, films, blaasvorming, extrusion molding, injection molding and other fields. Different application fields have different requirements on the performance of masterbatch (soos verspreibaarheid, temperatuur weerstand, color fastness) and production efficiency, which also determines the selection of twin-screw extruders. Zhuoyue se volledige reeks ekstrueerders kan doelgerigte oplossings vir verskillende toepassingsvelde bied, verseker dat die vervaardigde meesterbatch aan die spesifieke vereistes van stroomaf-produkte voldoen. Die volgende is 'n gedetailleerde inleiding tot die toepassingsvelde van masterbatch en die bypassende Zhuoyue-ekstruderreeks.

4.1 Veselveld: Hoë-dispergeerbaarheid en kleurvastheidvereistes

Meesterbatch in die veselveld word hoofsaaklik gebruik vir die kleur van chemiese vesels, such as polyester fiber, nylon fiber, polipropileenvesel, ens., en die finale produkte sluit matte in, tekstiele, kussings, nie-geweefde stowwe, ens. Hierdie veld het uiters hoë vereistes vir meesterbatch: eers, hoë verspreibaarheid. Die vesel deursnee is baie klein (gewoonlik 'n paar mikrons tot dosyne mikrons), en as die pigmente in die masterbatch nie eenvormig versprei is nie, dit sal kleurkolle veroorsaak, strepe en ongelyke fynheid van die vesel, affecting the appearance and quality of the fiber product; tweede, 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; derde, 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-laag films, verpakking films, landbou films, ens. The key requirements of this field for masterbatch are: eers, high transparency. For transparent or translucent films (such as food packaging films, agricultural mulch films), the masterbatch must have good transparency, avoiding affecting the appearance and visibility of the packaged products; tweede, eenvormige kleur. The film surface must be uniform in color, without color spots, color streaks and color difference, ensuring the aesthetic property of the film; derde, 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, soos mediese en kosmetiese houers, smeerolie- en verfhouers, drankbottels, plastic barrels, ens. The requirements of this field for masterbatch are: eers, 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; tweede, 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; derde, 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, plastic barrels), 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, drankbottels), 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, soos lakens, pype, drade en kabels, profiele, ens. The key requirements of this field for masterbatch are: eers, high dimensional stability. Extrusion products (soos pype, profiele) have strict requirements on dimensional accuracy, and the masterbatch must have stable performance, avoiding the deformation and color difference of the product due to uneven shrinkage; tweede, good wear resistance. For products such as pipes and wires and cables that need to withstand friction and extrusion, the masterbatch must have good wear resistance, ensuring the service life of the product; derde, good weather resistance. For outdoor extrusion products (such as building profiles, outdoor pipes), the masterbatch must have good weather resistance, avoiding color fading and performance degradation under sunlight and rain.

For the extrusion molding field, the suitable Zhuoyue extruder series are HTS PLUS series, HTE series and HTS SUPER series. For ordinary extrusion masterbatch (such as indoor sheets, ordinary pipes), the HTE series and HTS BASIC series are recommended. Their good mixing and dispersing effect can ensure uniform coloring of the product, 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, soos motoronderdele, elektroniese produkte, konstruksie materiaal, huishoudelike toestelle, meubels, speelgoed, ens. The requirements of this field for masterbatch are diverse, but the core requirements are: eers, hoë verspreibaarheid. 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; tweede, 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; derde, targeted functional requirements. Byvoorbeeld, 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, formula, 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 Oplossings:

• (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 (binne 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 minute, 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, vat en skroef; 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, wat daartoe lei dat die materiaal te lank in die ekstrusieholte bly (meer as 3 minute), en termiese ontbinding vind plaas.
• (3) Swak hitteafvoer van die toerusting: Die verkoelingstelsel van die loop faal, wat lei tot plaaslike oorverhitting van die vat.
• (4) Raw material problems: Die hittebestandheid van die pigment is swak, of die draer is maklik om teen hoë temperatuur af te breek.

5.2.2 Oplossings:

• (1) Pas ekstrusietemperatuur aan: Verlaag die temperatuur van die menggedeelte, homogeniseringsgedeelte en die kop gepas, en beheer dit binne die hitteweerstandsbestek van die pigment en draer (150-220℃ vir gewone meesterbatch, 200-280℃ for engineering plastic masterbatch); kontroleer die temperatuursensor gereeld om akkurate temperatuurbeheer te verseker.
• (2) Verkort die verblyftyd: Increase the screw speed appropriately, verminder die kompressieverhouding van die skroef, en verseker dat die verblyftyd van die materiaal in die ekstrusieholte is 1-3 minute.
• (3) Onderhou die verkoelingstelsel: Gaan die koelwatersirkulasiestelsel gereeld na, maak die verkoelingspyp skoon, en verseker dat die loop hitte normaalweg kan verdryf; vervang die foutiewe verkoelingselement betyds.
• (4) Optimize raw materials: Kies pigmente met goeie hittebestandheid (soos anorganiese pigmente vir hoë-temperatuur verwerking); kies draers met stabiele werkverrigting en nie maklik om af te breek nie; voeg toepaslike hittestabiliseerders by (0.5%-3%) om pigmentafbraak en draerafbraak te voorkom.

5.3 Common Problem 3: Hoë slytasie van skroef en vat, Kort Diens Lewe

Hierdie probleem is algemeen in die verwerking van wit meesterbatch, swart masterbatch en vuller masterbatch, wat hoofsaaklik gemanifesteer word in die vinnige slytasie van die skroef en loop, verminderde skuifkrag en mengvermoë van die ekstruder, en verhoogde onderhoudskoste. The main causes and solutions are as follows:

5.3.1 Main Causes:

• (1) Raw material problems: Die pigment of vuller het 'n hoë hardheid (such as titanium dioxide, koolstof swart, kalsiumkarbonaat), en die deeltjiegrootte is te groot, wat erge slytasie aan die skroef en loop veroorsaak.
• (2) Extrusion parameter problems: Die skroefspoed is te hoog, die skuifkrag is te groot, en die wrywing tussen die materiaal en die skroef/vat word verhoog; die ekstrusiedruk is te hoog, wat die slytasie van die skroef en loop verhoog.
• (3) Equipment problems: Die skroef en loop is gemaak van materiale met swak slytasieweerstand, of die verwerkingstegnologie is onbehoorlik; die skroef en loop is nie behoorlik gepas nie, wat lei tot ongelyke spanning en verhoogde slytasie.

5.3.2 Oplossings:

• (1) Optimize raw materials: Kies pigmente of vullers met 'n klein deeltjiegrootte (20-40 gaas) en lae hardheid; vergruis en sif die grondstowwe om groot deeltjies te verwyder; voeg toepaslike smeermiddels by (0.5%-2%) om die wrywing tussen die materiaal en die skroef/vat te verminder.
• (2) Adjust extrusion parameters: Verminder die skroefspoed en ekstrusiedruk gepas, en beheer die skuifkrag binne 'n redelike omvang; 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: Instability of Product Quality Between Batches, Color Difference

This problem is mainly manifested in the inconsistency of masterbatch quality (such as concentration, verspreibaarheid, kleur) 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, dispergeermiddel en ander bymiddels fluktueer (fout oorskry ±1%).
• (2) Grondstof probleem: Die prestasie van grondstowwe (soos pigmentkleursterkte, draer smeltpunt) van verskillende groepe is inkonsekwent.
• (3) Verwerk parameterprobleem: Die ekstrusie temperatuur, skroef spoed, voerspoed en ander parameters wissel tussen verskillende groepe, wat lei tot inkonsekwente verwerkingseffek.
• (4) Toerusting probleem: Die toerusting het swak stabiliteit, en die parameters (soos temperatuur, druk) kan nie vir 'n lang tyd stabiel gehou word nie.

5.4.2 Oplossings:

• (1) Beheer die formuleverhouding streng: Gebruik hoë-presisie weegtoerusting om grondstowwe te weeg, en die fout word binne ±1% beheer; 'n formulebestuurstelsel te vestig, en teken die dosis van elke grondstof in detail aan.
• (2) Standaardiseer grondstofverkryging en inspeksie: Kies grondstofverskaffers met stabiele kwaliteit, en inspekteer die werkverrigting van grondstowwe (soos kleursterkte, particle size, voginhoud) voor gebruik; vir grondstowwe van verskillende groepe, voer eers proefproduksie uit om konsekwente prestasie te verseker.
• (3) Standaardiseer verwerkingsparameters: Gebruik 'n intelligente beheerstelsel (soos Zhuoyue se PLC-beheerstelsel) om die verwerkingsparameters van verskillende meesterbatch te stoor, en noem die ooreenstemmende parameters wanneer verskillende groepe geproduseer word, avoiding repeated debugging; kontroleer gereeld die toerustingparameters om stabiele werking te verseker.
• (4) Vestig kwaliteit inspeksie stelsel: Doen streng kwaliteit inspeksie op elke bondel meesterbatch, insluitend kleur, verspreibaarheid, konsentrasie en ander aanwysers, en lewer slegs die produkte wat aan die standaarde voldoen.

5.5 Common Problem 5: Swak verwerkingsvloeibaarheid van Masterbatch, Moeilike ekstrusie, Toerustingblokkering

Hierdie probleem word hoofsaaklik gemanifesteer in die moeilikheid van materiaal vervoer en ekstrusie, lae produksiedoeltreffendheid, onstabiele ekstrusiedruk, en selfs blokkasie van die matrijskop en ekstrusieholte, wat die normale produksie beïnvloed. The main causes and solutions are as follows:

5.5.1 Main Causes:

• (1) Grondstof probleem: Die draer het swak vloeibaarheid, of die pigmentinhoud te hoog is (meer as 80%), wat lei tot swak vloeibaarheid van die mengsel; die grondstof het 'n hoë voginhoud, wat veroorsaak dat die materiaal agglomereer en die voerpoort blokkeer.
• (2) Voormengprobleem: Die voorafmenging is ongelyk, en die dispergeermiddel is nie heeltemal gemeng nie, wat lei tot swak vloeibaarheid van die materiaal.
• (3) Ekstrusie parameter probleem: Die ekstrusietemperatuur is te laag, the carrier is not fully melted, en die vloeibaarheid is swak; die skroefspoed is te laag, die vervoerkapasiteit is onvoldoende; die gat van die matryskop is te klein, en die ekstrusieweerstand is te groot.
• (4) Toerusting probleem: Die skroef vervoer elemente is verslete, die vervoerkapasiteit word verminder; die voertoestel faal, wat lei tot ongelyke voeding.

5.5.2 Oplossings:

• (1) Optimize raw materials: Kies draers met goeie vloeibaarheid; verminder die pigmentinhoud gepas (beheer binne 80%); droog die grondstowwe deeglik om die voginhoud hieronder te beheer 0.1%.
• (2) Improve premixing effect: Verleng die voormengtyd, verhoog die mengspoed, verseker dat die dispergeermiddel ten volle met die pigment en draer gemeng is, en verbeter die vloeibaarheid van die mengsel.
• (3) Adjust extrusion parameters: Verhoog die ekstrusietemperatuur gepas om te verseker dat die draer ten volle gesmelt is; verhoog die skroefspoed om die vervoerkapasiteit te verbeter; vervang die matryskop met groter matrysgate om ekstrusieweerstand te verminder.
• (4) Maintain equipment: Vervang verslete skroefvervoerelemente; kontroleer die voertoestel gereeld, en herstel of vervang die foutiewe onderdele betyds; maak die toevoerpoort en ekstrusieholte gereeld skoon om materiaalophoping en verstopping te vermy.

6. Practical Application Cases of Zhuoyue Extruders in Masterbatch Processing

To further verify the performance advantages and application effects of Zhuoyue’s full series of extruders in masterbatch processing, 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 Geval 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.

Oplossing: 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 Geval 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 (pigment content 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.

Oplossing: 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 maande tot 18 maande, 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% aan 99%. The customer’s PA66 masterbatch has successfully entered the supply chain of a well-known automotive parts manufacturer.

6.3 Geval 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 (pigment content 40%) for food packaging films. The masterbatch requires good transparency, eenvormige kleur, en lae produksiekoste. 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.

Oplossing: 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% aan 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 Geval 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, lae onderhoudskoste, and strong adaptability.

Oplossing: 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, funksionalisering, 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, skadeloos, low-volatile, degradable and recyclable, en giftige en skadelike pigmente (soos swaarmetaalpigmente) and additives will be completely eliminated. Byvoorbeeld, water-based masterbatch, bio-based masterbatch and recyclable masterbatch will have broad market prospects. Terselfdertyd, 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, vlamvertrager, antistaties, antibakteriese, UV-resistant) into one masterbatch, which can reduce the addition amount of masterbatch, simplify the processing process, and reduce production costs. Byvoorbeeld, new energy vehicle masterbatch will integrate high temperature resistance, vlamvertrager, antistatic and other functions; medical masterbatch will integrate non-toxic, antibakteriese, high transparency and other functions. Daarby, 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, concentration, funksie, tipe draer), and masterbatch manufacturers need to provide personalized customization solutions according to the specific needs of customers. Byvoorbeeld, 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. Byvoorbeeld, 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 Hoë doeltreffendheid, 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. Byvoorbeeld, 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 (such as filler masterbatch, engineering plastic masterbatch), the requirements for the performance and wear resistance of twin-screw extruders will be higher. The future extruders will adopt more high-performance wear-resistant materials (such as new alloy steel, ceramic materials) and advanced manufacturing technologies (such as laser cladding, bimetallic composite), which can greatly improve the wear resistance and corrosion resistance of the screw and barrel, extend the service life of the equipment. Terselfdertyd, the extruders will be equipped with higher torque gearboxes and more advanced mixing elements, which can provide stronger shear force and kneading force, meeting the processing needs of high-performance masterbatch.

7.2.4 Modularization and Flexibility.

Modularization and flexibility will become an important development trend of twin-screw extruders. The future extruders will adopt a more perfect modular design, and the screw, vat, 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. Byvoorbeeld, when producing different types of masterbatch, only the corresponding screw elements and die head need to be replaced, without replacing the entire extruder. Daarby, 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, and make layout in the following aspects: eers, strengthen the R&D of intelligent extrusion technology, integrate AI, big data and Internet of Things technologies into the extruder design, launch more intelligent and automatic extruders, and help customers realize intelligent production; tweede, increase the R&D investment in high-performance wear-resistant materials and energy-saving technologies, develop more efficient, energy-saving and wear-resistant extruders, reduce the production cost and environmental impact of customers; derde, strengthen the R&D of customized solutions, according to the personalized needs of different customers, provide targeted extruder configuration and processing solutions, and improve customer satisfaction; vierde, expand the R&D of environmental protection masterbatch processing technology, launch extruders suitable for water-based masterbatch, bio-based masterbatch and recyclable masterbatch processing, and help the masterbatch industry achieve green development.

8. Gevolgtrekking

Meesterbatch, 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, funksionalisering, 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 BASIC/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, presiese temperatuurbeheer, hoë slytasieweerstand, hoë produksiedoeltreffendheid, 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.

In die toekoms, 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.