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Heterophasic (impact) copolymer, also called block copolymer, is a type of polypropylene copolymer commonly used in polypropylene corrugated boards, automotives, and toys.


To improve impact resistance of polypropylene, ethylene-propylene rubber (EPR) is dispersed in the polymer matrix during the polymerization process to create heterophasic (impact) copolymer.


Impact copolymer has good impact resistance at both ambient and low temperatures, making it suitable for cold weather applications. It also exhibits good long-term thermal stability (aging resistance), making this type of polypropylene ideal for corrugated boards, toys, automotive, motorcycle, and appliance applications.

Features and Benefits of Impact Copolymers

  • Good chemical resistance, good acid/alkali resistance
  • Excellent low-temp impact resistance
  • Excellent long-term thermal stability
  • Good processability

Impact Copolymer Applications

Toughness and flexibility make impact copolymers ideal for toys as it can withstand rough play without breaking. With high impact resistance even at low temperatures, polypropylene toys are safe and durable for both indoor and outdoor use.

Its lightweight nature, ability to withstand various environmental conditions, and high impact resistance and make impact copolymers perfect for polypropylene-based automotive parts like bumpers, dashboards, and panels.

The combination of strength, impact absorption, and flexibility of impact copolymers ensure polypropylene baby safety seats remain structurally sound during collisions while providing enough flexibility to prevent fractures.

With superior chemical resistance and durability, paint buckets and battery cases made from impact copolymers can store a wide range of substances with low risk of leaks or damage even with rough handling.

Impact copolymers are tough, impact-resistant, and easily processable. Caps and closures made from this type of polypropylene provides a reliable seal and can withstand repeated use without damage.

Its strength, flexibility, and lightweight properties make impact copolymers ideal for polypropylene corrugated boards.

Impact Copolymer Product Specifications

GradeMFRFMApplication Keywords
70110.312500Extrusion: board, tube and Blown: Bottle
70120.9513000Extrusion: board, tube and Blown: Bottle
71011.315800Extrusion: board, tube and Blown: Bottle
719U1.214800Extrusion: board, tube and Blown: Bottle
7233N2713000Injection: automobile and motorcycle parts, home appliances, washing machine drums, thin-walled products
737U5.514700Injection: Paint buckets, car accessories, furniture
74337.713800Injection: Battery boxes, automobile and motorcycle parts, crates, home appliances
7433-99.513900Injection: Battery boxes, automobile and motorcycle parts, crates, home appliances
7533514800Injection: Battery boxes, automobile and motorcycle parts, crates, home appliances, furniture
7533N516000Injection: Battery boxes, automobile and motorcycle parts, crates, home appliances, furniture
7633213500Extrusion: Board, tube, Blown: Bottle, and Injection: Crates, automobile and motorcycle parts, furniture
7633U211000Extrusion: Board, tube, Blown: Bottle, and Injection: Crates, automobile and motorcycle parts
77513211000Injection: Famous brand lifting rings, automobile and motorcycle accessories, home appliances, thin-walled products
77713213500Injection: Auto parts, home appliances, washing machine drums, thin-walled products
777U3210098Injection: Auto parts, large household products, thin-walled products, mixed chain processing base materials
78725012000Injection: Famous brand lifting rings, automobile and motorcycle accessories, home appliances, washing machine drums, thin-walled products
797F8012000Injection: Automobile and motorcycle parts, large household products, washing machine drums, thin-walled products, mixed chain substrates
ST0311414200Injection: Automobile and motorcycle parts, home appliances, washing machine drum
7633-3313000Extrusion: Board, tube, Blown: Bottle, and Injection: Crates, automobile and motorcycle parts, furniture

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