AUTOMOBILE PART OBTAINED BY INJECTION-MOLDING POLYPROPYLENE RESIN COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide automobile parts excellent in balance of stiffness and impact resistance, in particular, injection-molded automobile parts. SOLUTION: The injection-molded automobile parts are composed of a polypropylene resin composition comprising a propylene homopolymer (A1), an elastomer (B) and an inorganic filler (C), or a propylene-based block copolymer (A2) and (C) the inorganic filler and if necessary, the elastomer (B). The polypropylene homopolymer (A1) or the propylene-based block copolymer (A2) exhibits the following characteristics (i)-(iii): (i) an MFR (230°C) of 20 to 300 g/10 min; (ii) a 0.2% or less of a ratio of position irregular units derived from 2,1-insertion or 1,3-insertion of propylene monomer relative to all propylene structural units, determined from a13C-NMR spectrum; and (iii) an Mw/Mn of 1 to 3. COPYRIGHT: (C)2010,JPO&INPIT