CPE 135A (Chlorinated Polyethylene 135A) – Impact Modifier for Rigid PVC & Industrial Polymer Modification

Product Overview

CPE 135A is a high-performance chlorine-modified polyethylene impact modifier, widely used as a functional toughening additive in rigid PVC formulations and other industrial polymer compounding systems. When matched to the right formulation, it significantly improves low-temperature impact resistance, processing stability, and long-term weatherability of hard plastic products.

Our CPE 135A is engineered to meet consistent quality standards across the global plastics processing industry. Suitable grades are extensively applied in PVC profile manufacturing, pipe and fitting extrusion, sheet production, wood-plastic composites, rubber blending, and other modification scenarios, depending on exact technical specifications.

As a versatile polymer modifier, CPE 135A helps manufacturers resolve the inherent brittleness of unmodified rigid PVC, delivering balanced mechanical performance, processing compatibility, and long service life for finished parts under normal and extreme environmental conditions.

Key Features and Benefits

‌Impact Toughening Performance‌
CPE 135A forms a uniform network structure within the PVC matrix, dramatically increasing notched impact strength of rigid PVC products. At typical recommended dosages, it converts brittle fracture behavior into ductile fracture, effectively preventing cracking during post-processing, transportation, and long-term outdoor use.

‌Low-Temperature Flexibility‌
With its precisely controlled 35% ± 2% chlorine content, CPE 135A retains excellent flexibility even at temperatures as low as -30°C. It eliminates the common low-temperature brittleness defect of unmodified PVC, making formulations suitable for cold-climate outdoor construction and industrial applications.

‌Excellent Formulation Compatibility‌
Its dual molecular structure of chlorinated polar segments and non-polar PE segments ensures outstanding miscibility with PVC, PE, ABS, and rubber materials. No phase separation or precipitation occurs during extrusion and injection molding, supporting stable and consistent mechanical properties throughout mass production.

‌Superior Weather and Aging Resistance‌
The fully saturated polymer backbone provides exceptional UV stability, ozone resistance, and chemical corrosion tolerance. PVC products modified with CPE 135A maintain stable physical properties after years of outdoor exposure, far extending the service life of building and industrial plastic components.

‌Processing Optimization‌
CPE 135A promotes uniform plasticization in PVC processing, reduces melt fracture, and improves surface smoothness of extrudates. It adapts seamlessly to standard twin-screw extruders, single-screw extruders, and injection molding equipment, helping lower scrap rates and enhance continuous production efficiency.

‌Balanced Flame Retardant Contribution‌
Its stable chlorine content naturally raises the oxygen index of PVC formulations, supporting reliable self-extinguishing performance without requiring excessive additional flame retardant loading, helping finished products meet standard building material fire safety requirements.

Technical Specifications

CPE 135A grades are standardized for consistent chlorine distribution, particle size, and physical properties to ensure reliable batch-to-batch consistency. Below are general technical parameters for typical commercial grades:

Applications of CPE 135A

‌CPE 135A for PVC Profile Manufacturing‌
Widely used in PVC window and door profiles, decorative trim, outdoor guardrails, shutter slats, and construction extruded parts. At typical 9–12 phr addition, it ensures profiles pass strict low-temperature impact tests and long-term weathering standards for the global building materials market.

‌CPE 135A for PVC Pipe & Fittings‌
Applied in PVC water supply pipes, drainage pipes, electrical conduits, and injection-molded pipe accessories. At 4–6 phr recommended dosage, it boosts pressure resistance, drop-weight impact performance, and low-temperature crack resistance, making piping systems more reliable for municipal and industrial plumbing projects.

‌CPE 135A for PVC Sheet & Board‌
Suitable for PVC decorative panels, foamed boards, cabinet sheets, advertising rigid sheets, and calendered products. CPE 135A improves forming stability, reduces edge cracking during cutting and drilling, and enhances overall surface quality of finished flat products.

‌CPE 135A for High-Filled PVC & Wood-Plastic Composites‌
Used in calcium carbonate high-loading PVC compounds and WPC formulations to offset the strength loss caused by large filler addition. It maintains product toughness while allowing higher filler content, supporting cost optimization without sacrificing final part durability.

‌CPE 135A for Rubber & Elastomer Compounding‌
Selected CPE 135A grades can be blended with NBR, EPDM, SBR and other rubber systems to improve low-temperature flexibility, abrasion resistance, and chemical resistance, producing durable blends for sealing parts, industrial hoses, and rubber components.

‌CPE 135A for Electrical & Industrial Hard Parts‌
Applied in PVC electrical enclosures, wiring accessories, and industrial corrosion-resistant plastic components. It enhances electrical insulation performance and mechanical impact strength, meeting the safety and long-term durability requirements of electrical and general industrial applications.

Packaging & Storage

‌Packaging‌: 25kg net weight per kraft paper bag with inner PE liner，18-20tons/20'GP

‌Storage‌: Keep in a cool, dry and well-ventilated warehouse, avoid direct sunlight and moisture

‌Shelf Life‌: 12 months under recommended storage conditions

How to Select the Right CPE 135A Grade

Choosing the correct CPE 135A grade and determining the optimal addition level depends on your specific formulation system and processing conditions. Key selection factors include:

‌Target Application‌: Confirm whether the primary use is for PVC profiles, pipes, sheets, wood-plastic composites, or rubber blending, as recommended dosage ranges differ significantly across scenarios.

‌Base Polymer Compatibility‌: Verify compatibility with your main resin system (PVC, ABS, PE, etc.) to ensure uniform toughening effect without phase separation.

‌Processing Equipment‌: Adjust addition level according to extruder screw configuration, processing temperature profile, and continuous production speed.

‌Filler Loading‌: Higher calcium carbonate or mineral filler content generally requires fine-tuning of CPE 135A dosage to compensate for toughness reduction.

‌Performance Requirements‌: If your finished products need to pass strict low-temperature impact tests or 10+ year outdoor weathering standards, select a high-consistency grade with stable chlorine distribution.

Frequently Asked Questions (FAQ)

Q: What is CPE 135A?
A: CPE 135A is a chlorinated polyethylene impact modifier produced by chlorinating high-density polyethylene. It is the industry standard grade widely used in rigid PVC formulations to improve impact toughness, low-temperature flexibility, and long-term weather resistance.

Q: What is the typical recommended dosage of CPE 135A in PVC formulations?
A: For PVC window and door profiles, the usual recommended dosage range is 9–12 parts per hundred resin. For PVC pipes and fittings, the typical addition level is 4–6 phr. Exact optimal values should be determined through formulation trials based on your specific base resin, filler system, and target performance requirements.

Q: What is the difference between CPE 135A and other CPE grades such as CPE 130A or CPE 140B?
A: CPE 130A has slightly lower chlorine content for enhanced low-temperature flexibility, while CPE 140B features higher chlorine content for improved flame retardancy and chemical resistance. CPE 135A delivers the best overall balance of toughness, compatibility, and processability for most general-purpose rigid PVC applications.

Q: Can CPE 135A be used together with ACR processing aids in PVC formulations?
A: Yes. CPE 135A and ACR processing aids are often combined in well-balanced PVC systems. CPE 135A primarily provides impact modification, while ACR improves plasticization speed and surface gloss. Their combined use achieves comprehensive improvements in both processing performance and final product mechanical properties.

Q: How should CPE 135A be stored and handled?
A: CPE 135A should be stored in a cool, dry, and well-ventilated warehouse, protected from direct sunlight and rain exposure. The standard shelf life is 12 months. After the shelf life expires, the material can still be used if it passes re-inspection for all relevant technical indicators.