Abstract: Provided is a method for producing a foam-molded article that has excellent rigidity, impact resistance, and external appearance, and is capable of ductile fracture. The method for producing a foam-molded article of the present invention includes a kneading step of melt-kneading a resin composition in the presence of a foaming agent, the resin composition containing 100 parts by weight of a propylene-based resin, 1 to 30 parts by weight of an aromatic vinyl-based thermoplastic elastomer, and 1 to 30 parts by weight of an inorganic filler, and a foaming step of injecting the resin composition in a molten state into a mold, to foam and mold the resin composition. The method can produce a foam-molded article that has excellent rigidity, impact resistance, and external appearance, and is capable of ductile fracture.

Abstract: 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. Using a polypropylene resin composition comprising 100 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, an expansion-molded article which is expanded at an expansion rate of 1.5 to 3 times is produced by injection expansion molding by means of a gas counter pressure technique.

Abstract: [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. [Solution] Using a polypropylene resin composition comprising 100 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, an expansion-molded article which is expanded at an expansion rate of 1.5 to 3 times is produced by injection expansion molding by means of a gas counter pressure technique.