Method of curing expansion-molded body of polyolefin

Details Method of curing expansion-molded body of polyolefin Method of curing expansion-molded body of polyolefin

B - Operations, Transporting

29

C

18/670

B29C 67/22 (1985.01)

Patent

CA 1219417

ABSTRACT OF THE DISCLOSURE 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° 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.

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