Extruded polypropylene resin foam and process for producing the same
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United States of America Patent
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Jul 17, 2012
Grant Date -
Jan 27, 2011
app pub date -
Sep 12, 2008
filing date -
Sep 14, 2007
priority date (Note) -
Expired
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Abstract
An extruded polypropylene type resin foam having a high expansion ratio of at least 15 times and a closed cell ratio of at least 70% and excellent in the heat insulation property, and its production process, are provided.
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