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

摘要

An electrostatic dissipative, polypropylene-based resin expanded bead containing electrically conductive carbon black, having an apparent density of 10 to 120 kg/m 3 and formed of a base resin which includes a polypropylene resin forming a continuous phase, and a polyethylene resin forming dispersed phases dispersed in the continuous phase, with the carbon black being unevenly distributed to the dispersed phases side. The polyethylene resin is an ethylene homopolymer or a copolymer of ethylene and C 4 to C 6 ±-olefinand a weight ratio of the polypropylene resin to the polyethylene resin is 99.5:0.5 to 65:35. A molded article obtained by in-mold molding of such expanded beads exhibits electrostatic dissipative properties with a surface resistivity in the range of 1×10 5 to 1×10 10 © in a stable manner.