POLYPROPYLENE-BASED RESIN FOAMED PARTICLES, METHOD FOR PRODUCING SAME, AND MOLDED ARTICLE OF POLYPROPYLENE-BASED RESIN FOAMED PARTICLES

摘要

The disclosed static-electricity-diffusible polypropylene-based resin foamed particles contain electroconductive carbon black and have an apparent density of 10 to 120 kg/m3, wherein: a base-material resin from which the foamed particles are formed is made of a polypropylene resin forming a continuous phase, and a polyethylene resin forming a disperse phase dispersed in the continuous phase; and said electroconductive carbon black is unevenly distributed on the disperse phase side. The polyethylene-based resin is a homopolymer of ethylene, or a copolymer of ethylene and an alpha-olefin having a carbon number of 4 to 6. The weight ratio between the polypropylene-based resin and the polyethylene-based resin is from 99.5:0.5 to 65:35. A molded article made by molding said foamed particles in a mold stably exhibits static-electricity diffusibility within the range of 1×105 to 1×1010 Omega in surface resistivity.