Expanded beads of polypropylene-based resin, and expanded bead molded body

Abstract

Polypropylene resin expanded beads including an expanded layer constituting the expanded beads, the expanded layer containing a polypropylene resin as a base resin, a cyclic phosphonate-based compound, and a NOR type hindered amine-based compound, the expanded layer having a blending amount of the cyclic phosphonate-based compound of 5 parts by mass or more and less than 25 parts by mass per 100 parts by mass of a resin component constituting the expanded layer, the expanded layer having a blending amount of the NOR type hindered amine-based compound of 0.1 part by mass or more and less than 5 parts by mass per 100 parts by mass of a resin component constituting the expanded layer, the expanded layer containing a phenol-based antioxidant, the expanding layer having a blending amount of the phenol-based antioxidant of 0.01 part by mass or more and less than 0.5 part by mass per 100 parts by mass of a resin component constituting the expanded layer, and a ratio of a blending amount of the phenol-based antioxidant with respect to a blending amount of the NOR type hindered amine-based compound is of 0.03 or more and 0.9 or less, and an expanded beads molded article obtained through in-mold molding of the expanded beads.

Dependencies are inferred from the claim text.