Polymer foaming using metal oxide particles
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United States of America Patent
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Issued Date -
Nov 3, 2005
app pub date -
Apr 14, 2005
filing date -
Apr 16, 2004
priority date (Note) -
Abandoned
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Abstract
Systems and methods for forming foamed thermoplastic polymer articles by adding metal oxide, particularly silica provided as a part of glass, to the polymer prior to extrusion of the polymer. The metal oxide may be added to particulate polymer prior to melting or to a polymer melt prior to extrusion. At least some of the metal oxide will remain in the resultant foamed polymer article produced.
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