Thermoplastic foam molding

Details Thermoplastic foam molding Thermoplastic foam molding

1985-07-12

1988-06-21

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 56, 521 60, 521 79, 521 81, 521 98, 521180, 521184, 521185, 521189, 521918, C08J 900

Patent

active

047526254

ABSTRACT:
A method for forming a molded thermoplastic foam structure comprising partially filling a mold with solvent imbibed particles of a thermoplastic resin, pressurizing said mold under conditions such as to prevent vaporization of said blowing agent during subsequent polymer melting, heating said polymer to a flowable state, releasing the mold pressure to permit foaming of the melt and expansion of the foamed polymer within the mold.

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