Method of making a spunbond
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United States of America Patent
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Jul 19, 2011
Grant Date -
Sep 11, 2008
app pub date -
Mar 6, 2008
filing date -
Mar 8, 2007
priority date (Note) -
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Abstract
A spunbond web is made by extruding a multiplicity of hot thermoplastic filaments, passing the filaments along an upstream stretch of a path, cooling and stretching the filaments as they move along the upstream stretch of the path, and depositing the cooled and stretched filaments at a downstream end of the upstream stretch on a foraminous belt such that the filaments form a mat thereon. The belt is continuously displaced the belt so as to move the mat downstream along a downstream leg of the path. The mat on the belt, then consolidated with a high-pressure water-jet treatment, and further processed.
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