Stock material or miscellaneous articles – Structurally defined web or sheet – Physical dimension specified
Patent
1987-06-26
1989-08-15
Anderson, Philip
Stock material or miscellaneous articles
Structurally defined web or sheet
Physical dimension specified
264 53, 264DIG5, 428332, 521139, 521180, 521182, 521184, 521189, B32B 520, B29C 6722, C08J 914
Patent
active
048573906
ABSTRACT:
A low density extruded structural foam of closed cell structure having good compressive strength comprising a engineered thermoplastic resin, alone, or containing a flame retarding agent and/or nucleating agent, optionally combined with a vinyl aromatic resin, and a blowing agent is produced by feeding said resin, or composition, into a primary extruder wherein mixing, adding a blowing agent which is essentially insoluble in the resin at room temperature but soluble in the melt and further mixing, then optionally passing the mixture to a second, cooling extruder, passing said extruded mixture through a die, then expanding and foaming said composition into a foam article.
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Allen Richard B.
Bacskai Barbara M.
Bopp Richard C.
Roberts Daniel L.
Anderson Philip
General Electric Company
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