Method and device for producing perforated nonwovens by hydrodynamic needling
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United States of America Patent
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Jun 18, 2002
Grant Date -
Apr 25, 2002
app pub date -
Dec 20, 2001
filing date -
Mar 22, 1999
priority date (Note) -
Expired
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Abstract
Method and device for producing perforated nonwovens by hydrodynamic needling. A nonwoven with a basically clean hole structure on a drum with plastic elevations can be produced by energy-rich water jets. Depending on the thickness of the fibers used in the nonwoven, however, certain fibers can nevertheless be stretched transversely across a hole. In order to avoid or eliminate this, the perforated nonwoven is subjected to singeing flames after drying.
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