Method and device for producing perforated nonwovens by hydrodynamic needing
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 15, 2002
Grant Date -
N/A
app pub date -
Mar 17, 2000
filing date -
Mar 22, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and device produce 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.
First Claim
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