METHOD FOR PRODUCING RESIN FOAM, AND RESIN FOAM

摘要

A method for producing resin foam including: a melt step of melting a resin composition including a polyolefin resin and a thermoplastic elastomer; an impregnation step of impregnating the molten resin composition with a material that is a gas at normal temperature and normal pressure, in a supercritical state, under a condition in which the supercritical state of the material is maintained; a foaming step of foaming the resin composition impregnated with the material by arranging the resin composition under a condition in which the supercritical state of the material is not maintained; and a compression step of hot-pressing the foamed resin composition.