| abstract |
The present invention provides a polypropylene resin composition for thin-wall injection molding that is excellent in transparency, whitening resistance, low-temperature impact strength, and thin-wall moldability. The polypropylene resin composition for thin-wall injection molding of the present invention contains a propylene-based resin material and a clearing nucleating agent, has an intrinsic viscosity of xylene solubles of 0.9 to 1.3 dl / g, and a temperature of 230. The propylene-based resin material is an ethylene / propylene copolymer or homopolypropylene having a melt flow rate of 30 to 70 g / 10 min measured under the conditions of ° C and a load of 21.6 N, and the ethylene unit is 1.2% by mass or less. In the presence of the above, an ethylene / 1-butene copolymer having an ethylene unit of 74 to 86% by mass is polymerized, and the ethylene / 1-butene is 100% by mass when the thin-walled injection molding polypropylene resin composition is 100% by mass. The content of the copolymer is 22 to 32% by mass. [Selection figure] None |