PRODUCTION OF THERMOPLASTIC RESIN FOAM MOLDING

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a thermoplastic resin foam molding having good shape stability and high fusion strength in foamed resin particles. SOLUTION: A molding comprises foamed core layer 11 of a crystalline thermoplastic resin and substantially nonfoamed cover layer 12 covering the core layer 11. The cover layer contains an ethylene polymer the melting point of which is lower than that of the thermoplastic resin or is latent. A process in which foamed resin particles 1 in which the ratio L/D between the long diameter L and the short diameter D of the particle is 0.5-3 are prepared and process in which the resin particles are placed in a molding mold and heated/ molded by hot blast to be fused together in order to obtain a foamed molding are included. A dry gas of 5 kPa or below steam pressure is uses as the hot blast.