POLYOLEFIN RESIN COMPOSITION

摘要

A polyolefin resin composition comprising (a) 50-94% by weight of a specific polypropylene/ ethylene-propylene copolymer composition, (b) 5-40% by weight of a specific ethylene/ alpha -olefin copolymer rubber and (c) 1-10% by weight of a specific hydrogenated diene block copolymer, wherein the component (a) comprises 60-95% by weight of a polypropylene component and 5-40% by weight of an ethylene-propylene copolymer component having an ethylene content of 30-80% by weight, the polypropylene component has an isotactic pentad ratio (P) of not less than 0.96 and a Mw/Mn (Q value) of not more than 6, and a ratio of the maximum melt flow rate (MFRmax) to the minimum melt flow rate (MFRmin) has the following relationship <MATH> and further the melt flow rate of the polypropylene component (MFRPP) and the melt flow rate of the ethylene-propylene copolymer component (MFREP) have the following relationship <MATH> and the component (b) has an ethylene content of 25-90% by weight and contains a polyethylene crystal having a long period of 6-14 nm as determined by a small angle X-ray scattering. The polyolefin resin composition can further comprise 5-30% by weight of talc.