Method for improving the crimping of polyolefin filter tow
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United States of America Patent
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-
May 15, 1990
Grant Date -
N/A
app pub date -
Aug 10, 1988
filing date -
Aug 10, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is provided for heating fibrillated polyolefin film prior to crimping, to improve the crimping, and thus the yield and variability as a filter, of the tow. The fibrillated tow is crimped while still hot from the heating step. The resulting fibers have more uniform crimping at higher levels than those not subject to heating.
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