METHODS OF MANUFACTURE OF POLYLACTIC ACID FOAMS

摘要

Method of forming a composition comprising impregnated polylactic acid (PLA) resin beads, by impregnating PLA resin beads with CO2. The method is carried out by contacting the beads with liquid CO2, and holding the impregnated beads at a temperature and pressure that prevents the beads from foaming while allowing the level of impregnated CO2 to reduce to about 4 to 20 weight % relative to the total weight of the beads and CO2.