Method of producing a thermoplastic foam sheet
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United States of America Patent
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-
Oct 11, 1994
Issued Date -
N/A
app pub date -
Jun 21, 1993
filing date -
Mar 16, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of producing a thermoplastic foam sheet comprising the step of (a) foaming, by extrusion, a mixture comprising polystyrene and a thermoplastic reclaim material obtained from a multi-layer sheet manufacturing process, wherein said thermoplastic reclaim material comprises polystyrene and a thermoplastic barrier resin selected from the group consisting of (i) copolymers of ethylene and vinyl alcohol, and (ii) polymers comprising a copolymer of acrylonitrile, to produce a foam sheet having an upper and lower surface.
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Cited Art Landscape
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