Engineered for exceptional color intensity, thermal stability, and seamless melt processing across blown film, injection, and extrusion lines.
Empowering global converters and OEM manufacturers with 16 years of advanced compounding mastery, stringent international compliance, and high-capacity production.
Located strategically in Zouqu Town, Zhonglou District, Changzhou, Jiangsu, China, our 6,000 m² ISO 9001:2015 certified manufacturing plant houses continuous co-rotating twin-screw extrusion lines. With dedicated dust-free formulation zones and automated gravimetric dosing systems, we manufacture high-concentration polyethylene (PE) black masterbatches, color concentrates, and mineral filler masterbatches engineered for maximum dispersibility.
Every single batch produced at Changzhou Jiazhou undergoes multi-stage laboratory verification. Utilizing spectrophotometers, melt flow indexers (MFI), carbon black dispersion testing equipment, and thermogravimetric analyzers (TGA), our engineering team guarantees tight jetness metrics (Hunter L < 24.5), low Filter Pressure Value (FPV < 1.5 bar/g), and absolute chemical safety complying with EU RoHS 2.0, REACH, and FDA food-contact standards.
An in-depth chemical and physical analysis of high-gloss surface formation, carbon black dispersion dynamics, and carrier resin compatibility.
High gloss in polyethylene (PE) molded and extruded components is directly tied to the primary particle size and structure of the carbon black pigment. Our high gloss grades utilize specialized Furnace and Channel Carbon Black with primary particle sizes ranging between 15 nm and 22 nm. Smaller primary particles absorb light more completely, minimizing surface light scattering and yielding deep, mirror-like jetness (ultra-low Hunter L-values).
Achieving superior surface gloss requires complete interfacial wetting between the PE carrier resin and the base matrix polymer (LDPE, LLDPE, HDPE, or PP). We select virgin Low-Density Polyethylene (LDPE) and Linear Low-Density Polyethylene (LLDPE) carriers with high Melt Flow Index (MFI 20–50 g/10min). This ensures low melt viscosity during processing, promoting rapid dispersion without creating surface roughness or melt fracture (shark-skin effect).
Un-dispersed carbon black agglomerates act as surface defects that severely degrade specular gloss. Our proprietary additive formulation incorporates low-molecular-weight polyethylene waxes, synthetic fatty acid esters, and fluoropolymer processing aids. This wetting system coats the carbon black aggregates, preventing re-agglomeration during cooling and providing an exceptionally smooth plastic surface finish.
| Technical Benchmark Parameter | High Gloss Grade (JZ-BLK-HG) | Standard Film Grade | Industrial Pipe Grade | Testing Standard Method |
|---|---|---|---|---|
| Carbon Black Concentration (%) | 40% – 50% | 35% – 45% | 40% – 50% | ASTM D1603 / TGA |
| Carbon Black Particle Size (nm) | 16 – 20 nm (High Jetness) | 22 – 28 nm | 30 – 45 nm (UV Grade) | TEM Micrographs |
| Melt Flow Index (190°C / 2.16kg) | 15.0 – 35.0 g/10min | 8.0 – 18.0 g/10min | 1.0 – 5.0 g/10min | ASTM D1238 / ISO 1133 |
| 60° Specular Gloss Unit (GU) | > 92.0 GU | 75.0 – 85.0 GU | 60.0 – 70.0 GU | ASTM D523 / ISO 2813 |
| Filter Pressure Value (FPV) | < 0.8 bar/g (14 µm mesh) | < 1.2 bar/g | < 2.5 bar/g | EN 13900-5 |
| Thermal Stability (°C) | 280°C (10 min dwell) | 260°C | 260°C | Internal Rheometer Protocol |
High gloss performance is not merely a function of carbon black loading percentage; it relies on the complete absence of micro-agglomerates greater than 5 microns. Changzhou Jiazhou's dual-stage high-shear compounding ensures micro-dispersion levels that maximize surface reflectivity and eliminate surface haze.
How Changzhou Jiazhou leverages Eastern China's petrochemical infrastructure to deliver cost leadership and unmatched quality consistency.
Situated in the Yangtze River Delta petrochemical hub, our Changzhou facility maintains direct, long-term procurement agreements with leading virgin resin producers (Sinopec, PetroChina) and specialized carbon black chemical groups. Direct pipeline and bulk container deliveries reduce raw material logistics overhead by 12–15%, savings directly passed onto global buyers.
Our plant operates multi-stage compounding extruders featuring high L/D ratios (Length-to-Diameter ratio > 48:1). Kneading block configurations are optimized via computer modeling to apply maximum shear stress at controlled melt temperatures. This breaks down carbon black agglomerates down to primary domain sizes without degrading the PE polymer chains.
Human error in masterbatch production can cause color drift across production lots. Changzhou Jiazhou uses fully automated loss-in-weight gravimetric feeders and closed-loop pneumatic conveying systems. Every export lot is assigned a unique barcode linked to raw material lot numbers, extruder temperature logs, and spectrophotometric test reports.
Evaluating masterbatch supplier metrics beyond basic unit price to minimize scrap rates, extend die clean-up intervals, and optimize let-down ratios.
Buying low-tier black masterbatch often results in unexpected financial losses due to poor dispersion. Micro-agglomerates cause pinholes in blown packaging films, surface streaks in injection-molded automotive parts, and premature clogging of extruder screen packs.
Choosing Changzhou Jiazhou's high-dispersion PE black masterbatch lowers Filter Pressure Value (FPV), extending continuous screen pack lifespans from 12 hours to over 72 hours, drastically reducing machine downtime and scrap rates.
Because of our ultra-high carbon black loading (up to 50%) and high tinting strength, converters can lower their standard Let-Down Ratio (LDR) from 4% down to 1.5% - 2.5% without sacrificing jetness or opacity.
Cost Reduction Impact: Lowering LDR by 1.5% on a 1,000-ton annual resin consumption line reduces total masterbatch purchasing volumes by 15 metric tons per year, generating substantial operational savings.
Tailored masterbatch formulations built to handle the mechanical, thermal, and surface demands of diverse manufacturing processes.
Applications: Automotive interior trim, consumer electronic housings, home appliance outer panels, high-end cosmetic caps.
Key Performance Need: Flawless surface gloss (>90 GU), absence of flow lines, sink mark suppression, and resistance to environmental stress cracking (ESCR).
Applications: E-commerce courier bags, heavy-duty shipping sacks, agricultural mulch films, barrier co-extrusion films.
Key Performance Need: Ultra-thin film extrusion (<15 microns) without pinhole formation, high tensile strength retention, and UV weatherability.
Applications: HDPE corrugated drainage pipes, telecommunication ducting, smooth sheets, wire jacket insulation.
Key Performance Need: Long-term UV protection (P-type carbon black), excellent thermal oxidation resistance, and smooth die-land extrusion performance.
How Changzhou Jiazhou is driving innovation aligned with the global circular plastic economy and strict environmental standards.
Standard carbon black absorbs Near-Infrared (NIR) light, making black plastic packaging invisible to automated sorting sensors at municipal recycling facilities. Changzhou Jiazhou has developed specialized NIR-Detectable Black Masterbatch formulations that allow black PE/PP containers to be detected and sorted, preventing landfill accumulation.
To assist brand owners in achieving carbon neutrality goals, we offer black masterbatch formulations using Post-Consumer Recycled PE (PCR-PE) and Bio-based Polyethylene derived from sugarcane ethanol. These carriers maintain equal mechanical strength while substantially lowering product carbon footprints.
Automotive interior applications demand stringent volatile organic compound (VOC) limits. Our high-gloss automotive-grade masterbatches undergo thermal vacuum degassing during extrusion, removing residual monomers and odor-causing compounds to meet global OEM specs (such as VDA 270).
Rigorous testing protocols ensuring total safety, regulatory compliance, and rapid international logistical support.
All masterbatch products exported by Changzhou Jiazhou Plastic Products Co., Ltd. are certified compliant with international statutory standards:
We provide robust export packaging options tailored to regional climate conditions during transit:
Expert technical responses to common questions encountered by polymer engineers and purchasing executives.
Premium color concentrates engineered with equal dispersion excellence and strict quality controls.
Get in touch with Changzhou Jiazhou's technical sales team for custom formulations, volume quote estimates, and immediate sample dispatch.
No. 4-3, Shengli Road, Buyi, Zouqu Town, Zhonglou District, Changzhou, Jiangsu, China
