| 摘要 |
PURPOSE: A polypropylene resin composition for the thinwall bumper cover for automobiles and a thinwall bumper cover prepared by injection molding the composition are provided, to improve stiffness and fluidity and to prevent the deformation after injection molding. CONSTITUTION: The polypropylene resin composition comprises 60-80 parts by weight of the high isotactic polypropylene resin which is a homopolymer of propylene or a copolymer of propylene and ethylene and has a melting index of 20-80 g/10 min (230 deg.C) and an isotactic index of 97-100; 10-30 parts by weight of an ethylene-α-olefin copolymer rubber; and 7-25 parts by weight of at least one inorganic filler selected from the group consisting of talc, calcium carbonate, calcium sulfate, magnesium oxide, calcium stearate, mica, silica, calcium silicate, clay and carbon black. |
