Polypropylene resin foam-molded article

Abstract

Provided is a polypropylene resin foam-molded article which has a rib having a relatively small thickness and which has an improved strength at a boundary part between a main body part and the rib part without increasing a thickness of the rib part. The polypropylene resin foam-molded article is obtained by molding a material for a foam-molded article using a polypropylene resin, wherein the molded article comprises a main body part and a rib part provided vertically to the main body part; the rib part has a thickness (Tr) of 3 mm or less, or a thickness ratio (Tr/Tb) of a thickness of the rib part (Tr) to a thickness of the main body part (Tb) is 0.8 or less; the main body part and the rib part each comprise a non-foamed surface layer and an intermediate layer having a foamed structure; and the intermediate layer in the main body part is connected to the intermediate layer in the rib part. It is molded from the material for a foam-molded article using a polypropylene resin in which a melt flow rate and a melt tension satisfy a fixed relation.

Dependencies are inferred from the claim text.