METHOD OF CURING EXPANSION-MOLDED BODY OF POLYOLEFIN

摘要

A method of curing an expansion-molded body of polyolefin prepared by heating the pre-expanded polyolefin particles filled in a mold characterized by cooling the molded body in the mold within the extent that the molded body in the mold retains its volume almost 100% equivalent to the volume of the mold cavity, removing the molded body from the mold, placing the molded body into an atmosphere having a temperature 25 to 55.degree. C lower than the melting point of the base polyolefin resin while the volume of the molded body is 70 to 110% relative to the volume of the mold cavity, and holding the molded body in the atmosphere until the temperature of the molded body equilibrates with the temperature of the atmosphere.