POLYMERIC FOAM POWDER PROCESSING TECHNIQUES, FOAM POWDER PRODUCTS, AND FOAMS PRODUCED CONTAINING THOSE FOAM POWERS

摘要

This relates variously to techniques for comminuting polymeric foams, to techniques for preparing polymeric foams containing that comminuted foam, an d to the resulting comminuted foam powder and polymeric foams. The procedures may be used on foams containing production contaminants such as polyolefins, paper, and foam skins and on other foams containing consumer contaminants su ch as wood, metal, leather, etc. The comminuted foam powder, with or without contaminants, preferably is screened or sifted to obtain a foam powder havin g a particle size of about 2 mm or less.