Shaping of air permeable structural members with thermoplastic binders
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United States of America Patent
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Issued Date -
Dec 14, 2006
app pub date -
Jul 30, 2004
filing date -
Aug 5, 2003
priority date (Note) -
Abandoned
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Abstract
The present invention relates to the shaping of mixtures of thermoplastic binders with fibers, foam, granules etc. The shaped air- or steam-permeable materials are heated by means of steam and subsequently cooled down by applying a vacuum and evaporating the condensate obtained during the heating, so that the shape impressed by the mold is permanently retained. For performing the process, the mold must have particular properties.
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