METHOD FOR PRODUCING FOAMING PARTICLES FROM RECOVERED STYRENE-BASED RESIN MATERIAL, FOAMED PARTICLES CONTAINING RECOVERED MATERIAL AND FOAMED MOLDED MATERIAL

摘要

PROBLEM TO BE SOLVED: To obtain foaming particles capable of affording a foamed molded material having a favorable mechanical strength, especially not being immediately cracked on bending greatly by using a recovered styrene-based resin material as a raw material.;SOLUTION: This method for producing foaming particles from the recovered styrene-based resin material is provided by measuring butadiene content contained in the recovered styrene-based resin and adjusting 1-6 wt.% butadiene content in the total resin, putting the resin into an extruder having attached with a metal net having ≤1.1 mm effective sieve opening, impregnating a foaming agent in the extruder, simultaneously extruding and cooling for suppressing the foaming and cutting to form particles.;COPYRIGHT: (C)2003,JPO