Patent ID: 7081493

Claim:
An automobile part comprising a polypropylene resin composition, the polypropylene resin composition comprising a propylene block copolymer (A2) and an inorganic filler (C), the propylene block copolymer (A2) comprising propylene homopolymer segment and propylene/α-olefin random copolymer segment, wherein the propylene homopolymer segment of the propylene block copolymer (A2) exhibits: (i) a melt flow rate (measured at 230° C. under a load of 2.16 kg according to ASTM D 1238) of 20 to 300 g/10 min, (ii) a proportion of position irregular units derived from 2,1-insertion or 1,3-insertion of propylene monomer relative to all propylene structural units, determined from a 3 C-NMR spectrum, each of 0.05% or less, and (iii) a molecular weight distribution (Mw/Mn), determined by gel permeation chromatography (GPC), of 1 to 3, and wherein, based on the total weight of the propylene block copolymer (A2) and the inorganic filler (C), in the polypropylene resin composition, the propylene homopolymer segment of the propylene block copolymer (A2) is contained in an amount of 30 to 80% by weight, the propylene/α-olefin random copolymer segment of the propylene block copolymer (A2) is contained in an amount of 15 to 40% by weight, and the inorganic filler (C) is contained in an amount of 5 to 30% by weight, and in cross fractionating chromatography (CFC) of the polypropylene resin composition, a 100 to 135° C. eluate with orthodichlorobenzene exhibits a ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) of 1 to 3.