Moldable thermoplastic polymer foam beads

Details Moldable thermoplastic polymer foam beads Moldable thermoplastic polymer foam beads

1994-09-30

1997-02-25

Seidleck, James J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 56, 521 58, 521 59, 521182, 521184, 521189, 521 79, 264 50, 264 51, 264 54, C08J 918

Patent

active

056059370

ABSTRACT:
A continuous process for making moldable foam beads comprising a non-crosslinked or crosslinked thermoplastic polymer foam are produced by mixing a composition comprising a non-crosslinkable or crosslinkable thermoplastic polymer or a thermoplastic polymer with a crosslinking agent, additives to achieve specific properties, a blowing agent, extruding the admixture under pressure, crosslinking, when applicable, the admixture under pressure, modulating the admixtures temperature to achieve the desired foaming properties, and then expanding the admixture in a zone of lower pressure to form a foam bead that can be molded.

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