| abstract |
An automobile part comprising a polypropylene resinncomposition, the polypropylene resin compositionncomprising a propylene homopolymer (A1), an elastomer (B)nand an inorganic filler (C), or comprising a propylene blockncopolymer (A2) and an inorganic filler (C) optionallyntogether with an elastomer (B), in specified proportions.nThe propylene homopolymer (A1), or the propylene homopolymernsegment of the propylene block copolymer (A2) exhibits annMFR (230°C) of 20 to 300 g/10 min, a ratio of position irregularnunits derived from 2,1-insertion or 1,3-insertion ofnpropylene monomer relative to all propylene structural units,ndetermined from a 13 C-NMR spectrum, each of 0.2% or less,nand an Mw/Mn, determined by GPC, of 1 to 3. n The present invention enables providing an automobilenpart (including an injection molded article) which has annexcellent balance of rigidity and impact resistance, on whichnthe possibility of flow marks is low and, even if flow marksnoccur, they are not conspicuous, and which realizes annexcellent emboss transfer on molded article surface tonthereby have an excellent appearance. n The polypropylene resin composition for use in thenpresent invention has the above formulation, so that thentime required for plasticization is short. Consequently, nthe molding cycle for producing an injection molded articlencan be shortened to thereby accomplish efficient productionnof an injection molded automobile part capable of realizingnthe above effects. |