| 摘要 |
PURPOSE: A composition for polypropylene resin is provided which improves whitening resistance without decreasing a good bending elasticity, impact strength and heat resistance. CONSTITUTION: The resin composition comprises 45-70 weight % of polypropylene block copolymer having 7-13 mole % of comonomer content, 20-40 weight % of polypropylene random copolymer having 5-18 mole % of comonomer content, and 5-30 weight % of polyethylene. Thus, 70 weight % of polypropylene block copolymer, 20 weight % of polypropylene random copolymer and 10 weight % of polyethylene are blended to give a polypropylene pellet. A result of physical test shows 1,500 MPa of bending elasticity, 8 kg cm/cm of Izod impact strength, and heat resistance, whitening resistance and brightness are excellent. |
