POLYPROPYLENE RESIN COMPOSITION, EXPANSION-MOLDED ARTICLE USING THE RESIN COMPOSITION, AND PROCESS FOR PRODUCTION OF THE EXPANSION-MOLDED ARTICLE

摘要

[PROBLEMS] To provide: a polypropylene resin composition which can produce an expansion-molded article showing excellent low-temperature impact properties even when expanded at an increased expansion rate; an expansion-molded article using the polypropylene resin composition, which has excellent low-temperature impact properties, is light in weight, and has good appearance; and a process for producing the expansion-molded article. [MEANS FOR SOLVING PROBLEMS] A polypropylene resin composition comprising 100 parts by weight of a polypropylene resin and 1 to 4 parts by weight of a polyethylene wax having a viscosity average molecular weight of 2400 to 3400. By using the polypropylene resin composition, an expanded molded article which is expanded at an expansion rate of 1.5 to 3 times can be produced by the injection expansion molding by means of a gas counter pressure technique.