| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polypropylene resin composition for thin-wall injection molding, which is excellent in transparency, whitening resistance, low-temperature impact strength and thin-wall moldability. <P>SOLUTION: The polypropylene resin composition for thin-wall injection molding includes a propylenic resin material and a clarifying nucleating agent, wherein the limiting viscosity of a xylene-soluble content is 0.9 to 1.3 dl/g, and the melt flow rate at a temperature of 230°C and at a load of 21.6 N is 30 to 70 g/10 min. The propylenic resin material is obtained by polymerizing an ethylene-1-butene copolymer having an ethylene unit of 74 to 86 mass% in the presence of an ethylene-propylene copolymer having an ethylene unit of <1.2 mass% or a homopropylene, wherein the content of the ethylene-1-butene copolymer with respect to 100 mass% of the polypropylene resin composition for thin-wall injection molding is 22 to 32 mass%. <P>COPYRIGHT: (C)2012,JPO&INPIT |
