POLYOLEFIN-RESIN PREFOAMED PARTICLES, IN-MOLD FOAMED MOLDING, AND METHOD FOR MANUFACTURING SAID PARTICLES AND SAID MOLDING

摘要

Provided is a foamed thermoplastic polymer material in which flame retardancy is improved without compromising the mechanical properties or cushioning properties of the material and without compromising the ability of the material to include an arbitrarily-defined additive therein. The polyolefin-resin prefoamed particles according to the present invention contain a prescribed organophosphorus compound (B) and a prescribed hindered amine (C) in a prescribed weight ratio.