| 摘要 |
PURPOSE: Provided is a polyolefin-based composite resin composition having high strength/low line-expansion, which is excellent in mechanical strength, impact-resistance, heat-resistance, injection-molding ability, lubrication, and dimensional stability and can be used as a part for exterior material of a car. CONSTITUTION: The polyolefin-based composite resin composition contains: 30-80wt%(based on the total amount of the composition) of a crystalline ethylene-propylene copolymer containing 0.5-35wt% of ethylene-propylene rubber and having a melt index of 5-60g/10min(230deg.C, 2.16kg); 5-40wt%(based on the total amount of the composition) of an ethylene-alpha-olefin copolymer containing 20-50wt% of olefin and having a melt index of 0.1-15g/10min(230deg.C, 2.16kg); 5-40wt%(based on the total amount of the composition) of a mineral reinforcement selected from talc, calcium carbonate, mica, glass fiber, asbestos, and kaolin; and additives.
|
