Engineered via co-rotating twin screw extruders for maximum filterability, zero agglomeration, and ultimate thermal stability up to 260°C.
Understanding the rheological mechanics and thermomechanical shear stress during high-loading pigment dispersion.
In modern polyolefin compounding, single-screw extruders and internal mixers often fail to achieve sub-micron pigment breakdown due to laminar shear limitations. At Changzhou Jiazhou Plastic Products Co., Ltd., our manufacturing lines utilize high-torque co-rotating intermeshing twin-screw extruders equipped with custom screw element profiles (L/D ratios ranging from 40:1 to 48:1).
The intense distributive and dispersive mixing within the kneading blocks forces primary pigment agglomerates through controlled shear zones. This ensures particle size reduction down to d50 < 0.5 microns, eliminating pinholes, filter blockage, and streak defects in downstream blown film and thin-wall injection processes.
A critical engineering parameter in masterbatch production is the Melt Flow Index (MFI) compatibility between the carrier resin and the end-use plastic matrix. Using an incompatible carrier leads to delamination, reduced tensile strength, and poor surface finish.
Our formulation engineers match pristine Low-Density Polyethylene (LDPE), Linear Low-Density Polyethylene (LLDPE), or High-Density Polyethylene (HDPE) carriers with specific wetting additives. This guarantees that the masterbatch melt flow closely mirrors your base polymer during extrusion, yielding a flawless monochromatic melt phase.
Technical Insight (Information Gain): Modern twin-screw extrusion allows precise control over Specific Mechanical Energy (SME) input. By fine-tuning the screw temperature zones (ranging from 160°C in the feed barrel to 240°C at the die block), we preserve the thermal stability of sensitive organic pigments while achieving up to 70% titanium dioxide (TiO2) or 50% carbon black pigment loadings.
16 Years of Dedicated OEM/ODM Manufacturing Excellence in Polyolefin Colorants
How specialized dispersion agents and inorganic mineral treatments optimize masterbatch efficiency.
| Masterbatch Grade | Pigment / Filler Type | Carrier Resin Base | Loading Conc. (%) | Key Technical Benefit |
|---|---|---|---|---|
| PE White Masterbatch | Rutile TiO2 (Al2O3/SiO2 coated) | Virgin LLDPE / LDPE | 40% - 75% | Maximum Opacity, High UV Refractivity, Anti-Yellowing |
| PE Black Masterbatch | High Purity Carbon Black (P-type/HAF) | LDPE / HDPE | 20% - 50% | Deep Jetness, UV Weathering Protection, Non-Blooming |
| PE Color Masterbatch | Organic Azo, Phthalocyanine, Perinone | HDPE / LLDPE | 20% - 40% | Heat Resistance 260°C, Delta E < 0.3, Non-Migration |
| PE Filler Masterbatch | Micronized CaCO3 / Talc (Stearic Treated) | Homo Polyethylene Base | 70% - 85% | Cost Reduction, Tensile Reinforcement, Reduced Shrinkage |
| Specialty Functional | HALS UV Inhibitors, Slip (Erucamide) | LLDPE | 10% - 30% | Antistatic, Anti-Block, Flame Retardance, Anti-Oxidant |
Unmodified inorganic pigments (like calcium carbonate or titanium dioxide) contain hydrophilic hydroxyl groups on their surfaces, causing poor dispersion within hydrophobic PE resin melts. We apply organic titanate or stearic acid coupling agents via high-speed turbomixers prior to extrusion, creating a hydrophobic monomolecular layer that guarantees instant polymer wet-out.
During high-temperature blown film extrusion or hot-runner injection molding (exceeding 240°C–260°C), low-quality dyes can migrate to the surface or thermally degrade into dull tones. Jiazhou color masterbatches exclusively employ high-molecular-weight organic pigments tested via TGA (Thermogravimetric Analysis) to ensure zero discoloration or gas blooming.
By maximizing pigment dispersion density, our high-concentration masterbatches allow plastic convertors to reduce let-down ratios (LDR) down to 1%–3% (compared to standard 4%–5% dosages). This dramatically decreases overall raw material costs while preserving the structural toughness of finished plastic goods.
How sourcing from Changzhou Jiazhou Plastic Products Co., Ltd. optimizes Total Cost of Ownership (TCO) for international enterprise buyers.
Located in Zouqu Town, Zhonglou District, Changzhou, Jiangsu, our facility is situated in China's prime polymer manufacturing hub. We maintain direct pipeline and bulk-rail procurement channels with petrochemical giants (SINOPEC, CNPC, and PetroChina), ensuring stable resin feedstocks even during global market supply volatility.
Proximity to Shanghai Port and Ningbo-Zhoushan Port allows seamless containerized export shipments. With specialized export packaging (25kg moisture-proof PE bags, aluminum foil vacuum bags, and 1.2-ton jumbo big bags), we guarantee zero resin contamination during transoceanic transit.
Global procurement teams demand total batch uniformity. Our digital spectrophotometer color matching (Datacolor 800 series) locks in shade formulas permanently. Every batch shipped comes with an automated Certificate of Analysis (COA) specifying MFI, moisture content (<0.05%), and Filter Pressure Value (FPV).
International procurement managers frequently face challenges regarding custom shade matching, minimum order quantities (MOQ), and shipping delays. At Jiazhou Plastic, we address these operational friction points through an agile operational framework:
Meeting international safety directives for food contact, toy manufacturing, and eco-sustainable plastic processing.
Global plastic converters must conform to severe chemical safety guidelines. All masterbatch series engineered by Changzhou Jiazhou Plastic Products Co., Ltd. are certified heavy-metal free and compliant with:
Our internal Quality Assurance (QA) lab operates under strict ISO 9001:2015 quality management standards. Every production lot undergoes five mandatory technical tests before release:
Tailored PE masterbatch solutions formulated specifically for demanding industrial processing methods.
Thin film blowing (down to 10–15 microns) demands absolute dispersion to avoid film tears and pinholes. Our PE white, black, and color masterbatches provide exceptional film clarity, opaque coverage for shopping bags, greenhouse agricultural mulching films, and heavy-duty shipping sacks (FFS bags).
HDPE pressure pipes for municipal water works and electrical corrugated conduit require long-term UV resistance and mechanical toughness. Our P-type carbon black masterbatches offer weatherability exceeding 20+ years, certified for outdoor exposure without polymer embrittlement.
For daily housewares, industrial storage crates, cosmetic bottles, and chemical drums, Jiazhou masterbatches deliver consistent surface gloss, warp-free injection cycles, high impact strength retention, and vibrant cosmetic finish.
Pioneering sustainable plastic coloring technologies for the circular plastic economy.
As EU carbon border adjustments and global sustainability mandates come into force, plastic manufacturers are increasing recycled content. Jiazhou has developed specialized PCR-PE Carrier Masterbatches formulated with up to 100% trace-certified recycled polyolefins. These masterbatches include integrated odor-neutralizers and antioxidant stabilizers to rebuild degraded polymer chains during processing.
Traditional filler masterbatches can compromise film clarity and impact resistance when added at high dosages. By upgrading our twin-screw extrusion compounding with ultra-fine ultrafine surface-modified nano-CaCO3 (0.1–0.4 microns), our next-generation filler masterbatches improve tensile strength and dart impact while reducing polymer raw material consumption by up to 25%.
Direct OEM factory pricing, fast 15-day order completion, and custom technical support.
Expert insights from our senior masterbatch formulation engineers and international export directors.
Twin-screw extruders (specifically co-rotating intermeshing designs) provide controlled shear fields, intense dispersive mixing, and self-wiping screw geometry. Unlike single-screw extruders, which rely mainly on drag flow and lower shear stress, twin-screw compounding breaks down pigment particle agglomerates into sub-micron sizes. This leads to higher pigment loading (up to 75% TiO2 or 50% carbon black), zero filter screen clogging, and vastly superior color strength in downstream blown film or extrusion processing.
Because Jiazhou manufactures high-concentration PE masterbatches, typical recommended let-down ratios range between 1% and 4% depending on the wall thickness and opacity requirements of your product. For thick-wall injection molding, 1% to 2% is generally sufficient. For ultra-thin blown films (15–25 microns), a 2% to 4% LDR ensures total color coverage without compromising sealability or film tensile strength.
We utilize Datacolor 800 spectrophotometers to record master reflectance curves for every client standard. Production batches are sampled continuously and evaluated for Delta E (ΔE). We maintain ΔE < 0.5 against approved physical retain standards. Additionally, automated gravimetric loss-in-weight feeders control pigment and polymer feed rates on our extrusion lines within ±0.2% precision.
Yes. We produce specific non-toxic, heavy-metal-free white, black, and color masterbatches engineered in accordance with FDA 21 CFR 177.1520 and EU Food Contact Regulation (EU) No 10/2011. These grades utilize high-purity virgin LLDPE/LDPE carriers and pigments tested for primary aromatic amine (PAA) limits and heavy metal migration.
PE-carrier masterbatch is widely compatible with Polypropylene (PP) resins due to similarities in polyolefin polymer chain structures. However, for engineering plastics like PS, ABS, PET, or PA, using a pure PE carrier can cause phase separation, delamination, or reduced impact strength. In such cases, we formulate customized universal carriers or specific SAN/PBT/EVA carrier systems.
Filter Pressure Value (measured in bar/gram according to DIN EN 13900-5) quantifies how much pressure builds up when molten masterbatch passes through a fine mesh filter pack. A high FPV indicates undispersed pigment agglomerates or contaminants, which cause frequent screen pack changes, film breaks, and pinholes. Jiazhou masterbatches maintain an extremely low FPV (< 0.5 bar/g), making them ideal for high-speed automated extrusion lines.
Our masterbatches are packed in heavy-duty 25 kg moisture-proof PE woven bags with inner liners, or 1.1–1.2 metric ton jumbo bags on fumigated wooden pallets. Stored in a cool, dry area away from direct sunlight, the masterbatch has a stable shelf life of 24 months from the date of manufacture.
