CPE 135A PVC Processing Aid Injection Molding Grade High Molecular Weight White

RUNYE CPE 135A injection molding grade is a high molecular weight chlorinated polyethylene impact modifier optimized for rigid PVC injection molding applications. This premium grade features carefully controlled molecular weight and Mooney viscosity to provide the ideal balance of melt fluidity and impact enhancement required for the high-shear, short-cycle injection molding process. The high molecular weight of this CPE 135A grade ensures effective impact modification at economical loading levels while the controlled elastomeric character provides the shear-thinning behavior beneficial for filling complex mold geometries with thin walls, intricate details, and long flow paths. During the injection molding process, CPE 135A particles undergo elongation and fibrillation under the intense shear conditions in the screw and nozzle, creating a finely dispersed elastomeric network in the PVC matrix. This network serves as a highly effective toughening mechanism, absorbing impact energy through cavitation and shear yielding processes that prevent catastrophic brittle fracture. Unlike some impact modifiers that can cause surface defects, flow marks, or gate blush in injection molded parts, our carefully engineered CPE 135A grade produces parts with excellent surface aesthetics including uniform gloss, consistent color, and freedom from visible flow lines. The product is supplied as a free-flowing white powder that is easy to handle, meter, and disperse in dry-blend and compound formulations.

• Optimized Flow Characteristics: The controlled molecular architecture provides balanced melt rheology that ensures complete mold filling of complex part geometries while maintaining sufficient melt strength to prevent jetting, weld line weakness, and other injection molding defects in finished PVC parts.
• High Impact Efficiency: Achieves excellent notched Izod and Charpy impact strength values at loading levels of 6-12 phr, enabling injection molded PVC parts to meet demanding impact requirements for applications such as electrical enclosures, appliance housings, and industrial components subjected to mechanical abuse.
• Superior Surface Finish: CPE 135A modified injection molded parts exhibit a smooth, glossy surface free from splay, silver streaking, gate blush, and other cosmetic defects, ensuring premium aesthetics for visible components in consumer, electrical, and automotive applications.
• Excellent Dimensional Stability: The controlled post-molding shrinkage and low moisture absorption of CPE 135A modified PVC compounds contribute to tight dimensional tolerances in injection molded parts, reducing warpage and ensuring reliable assembly with mating components.
• Heat Deflection Temperature Retention: Unlike plasticized PVC systems that suffer significant heat deflection temperature reduction, CPE 135A impact modification maintains the high HDT of rigid PVC, ensuring parts retain dimensional stability in elevated temperature service environments.
• Wide Processing Window: The thermal stability and shear tolerance of CPE 135A provides compounders and molders with a generous processing window, forgiving minor fluctuations in barrel temperature, injection speed, and cooling time without causing degradation or part defects.
• Multi-Cavity Consistency: The excellent dispersion characteristics of CPE 135A ensure uniform impact modification across all cavities in multi-cavity molds, providing consistent part quality and mechanical properties throughout the entire production run.

RUNYE CPE 135A injection molding grade is widely used for rigid PVC injection molded products including electrical junction boxes and switch housings, conduit fittings and accessories, appliance components and housings, furniture fittings and connectors, automotive interior and exterior trim parts, industrial valve bodies and pump housings, office equipment components, and consumer goods enclosures. The material is fully compatible with all commonly used PVC heat stabilizer systems, internal and external lubricants, processing aids, fillers, pigments, and other formulation ingredients. It can be incorporated via hot-cold dry blending with PVC resin followed by direct injection molding or via pre-compounding into pelletized ready-to-mold compounds for molders who prefer the convenience of pre-formulated materials. CPE 135A modified compounds also show good recyclability, with regrind from sprues and runners being re-incorporated without significant degradation of mechanical or aesthetic properties.

Our CPE 135A is packaged in 25kg woven bags with inner PE liner to prevent moisture absorption during storage and transportation. Bulk packaging options include 500kg jumbo bags and 1000kg palletized loads available upon request. Every production batch is rigorously tested in our in-house laboratory for chlorine content, tensile strength, elongation, thermal stability, and particle size distribution before release. We maintain complete batch traceability records and provide certificates of analysis (COA) with every shipment. Our factory operates under an ISO 9001:2015 certified quality management system, with raw material inspection, in-process control, and final product testing at every stage. Samples are retained for 12 months for quality traceability. We offer free samples for customer evaluation and technical support for formulation optimization to ensure maximum performance in your specific application.