EXPANDABLE STYRENE-MODIFIED OLEFIN RESIN PARTICLES, PRE-EXPANDED PARTICLES, AND METHOD FOR PRODUCING AN EXPANDED MOLDED ARTICLE

摘要

According to the present invention, there is provided a method for producing expandable styrene-modified olefin-based resin beads comprising steps of : impregnating styrene-modified olefin-based resin beads with an easily volatile blowing agent to obtain expandable resin beads, and impregnating 100 parts by weight of the expandable resin beads with 0.1 to 2.0 parts by weight of a surfactant at a temperature of 10 to 30°C and at a pressure of 0.05 to 0.30 MPa, to obtain expandable styrene-modified olefin-based resin beads.