| 摘要 |
PROBLEM TO BE SOLVED: To provide a polypropylene resin injection-compression molding for car interior parts bearing a fine mesh opening, typically like a speaker grill, permitting molding without impairing the commodity value and productivity of thin-wall-designed car interior parts and having a low specific gravity and a high impact strength. SOLUTION: The molding is formed by injection-compression molding of a propylene-ethylene block copolymer having an MFR of 50-90 g/10 min and an elution at 40°C or lower to the total elution of 23-35 wt.% in the temperature-rise elution fractionation in the temperature range of 0-140°C with o-dichlorobenzene as a solvent. The molding has a projected area of the whole body of 0.4 m<SP>2</SP>or larger and an average wall thickness of 2.7 mm or smaller. Among the moldings, at least one has such a design as to have an area of 200 cm<SP>2</SP>or larger and a mesh opening with a wall thickness of the mesh lattice of 2.7 mm or smaller. COPYRIGHT: (C)2004,JPO |
