Apparatus for stretching a non-woven web or an orientable polymeric material
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United States of America Patent
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-
Aug 25, 1981
Issued Date -
N/A
app pub date -
Jan 11, 1980
filing date -
Mar 31, 1975
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is described in a preferred embodiment of the present invention, a process and apparatus for bi-axially stretching a non-woven web of synthetic fibers in a first and second station wherein the first and second stations are provided with sets of rolls having grooves parallel and perpendicular, respectively, to the axis of each set of rolls. The groove pattern of the rolls is generally a sinosoidal wave with distances between grooves of less than 1.0 millimeters times the web basis weight in grams per square meter.
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