Propylene polymer fibers and yarns
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United States of America Patent
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Oct 10, 2000
Issued Date -
N/A
app pub date -
Nov 23, 1999
filing date -
Sep 16, 1996
priority date (Note) -
Expired
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Abstract
Process for treating a textile product comprising propylene polymer fibers comprises heating the textile product with the fibers in a substantially relaxed state at at least one temperature that is below the melting point of the propylene polymer but no more than about 20.degree. C. below such melting point. In one embodiment, the propylene polymer fibers subjected to such heating are characterized by a particular crystalline microstructure as determined by small angle X-ray diffraction. In another embodiment, the propylene polymer fibers subjected to such heating are melt spun, oriented fibers heated at at least one lower temperature.
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