Patent ID: 7655721

Claim:
A method for producing a propylene-based resin composition comprising: a first step of producing a first resin composition (MB) by melt-kneading a first propylene polymer (A-I) which is a powdery propylene polymer and a fibrous inorganic filler (B) in a weight ratio of (A-I) to (B) of from 3/7 to 7/3; and a second step of producing a second resin composition by adding a second propylene polymer (A-II), a non-fibrous inorganic filler (C) and an elastomer (D) selected from the group consisting of copolymer elastomer composed of ethylene and at least one kind of α-olefin having from 4 to 20 carbon atoms, styrene-ethylene-butene-styrene block copolymer rubber, styrene-butadiene block copolymer rubber, styrene-butadiene-styrene block copolymer rubber, styrene-isoprene-styrene block copolymer rubber and block copolymers resulting from hydrogenation of these block copolymer rubbers to the first resin composition (MB), followed by melt-kneading the second propylene polymer (A-II), the non-fibrous inorganic filler (C), the elastomer (D) and the first resin composition (MB).