POLYPROPYLENE-BASED RESIN FOAMED PARTICLES HAVING EXCELLENT FLAME RETARDANCY AND CONDUCTIVITY AND POLYPROPYLENE-BASED RESIN IN-MOLD FOAMED MOLDED PRODUCT

摘要

Provided are expanded polypropylene resin particles from which a polypropylene resin-based in-mold expansion-molded product is obtainable, the polypropylene resin-based in-mold expansion-molded product being excellent in electrical conductivity and particularly having improved in flame retardancy with no use of a flame retardant. Expanded polypropylene resin particles obtainable by expanding polypropylene resin particles containing a polypropylene resin composition which contains electrically conductive carbon black in an amount in a range of not less than 11 parts by weight and not more than 25 parts by weight with respect to 100 parts by weight of polypropylene resin, the electrically conductive carbon black having a dibutyl phthalate absorption amount in a range of not less than 300 cm 3 / 100 g and not more than 600 cm 3 / 100 g, have an average cell diameter in a range of more than 0.16 mm and not more than 0.35 mm.