Heat-resistant foamed polyester articles and process for their manufacture
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United States of America Patent
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Jun 26, 2012
Grant Date -
Jan 7, 2010
app pub date -
Sep 19, 2007
filing date -
Oct 13, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a process for thermoforming a foamed polyester sheet of low crystallinity to produce a heat-resistant molded foam article (13). The process comprises the steps of heating a foamed polyester sheet (10) to a preforming temperature by contact with at least one heating plate and molding the heated foamed polyester sheet onto a non-heated mold (30). The present invention further relates to a process for manufacturing a package by thermoforming a foamed polyester sheet of low crystallinity to produce a heat-resistant molded foam container, loading a product (51) into said container and sealing or welding a film of thermoplastic material (61) onto said container to close it.
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