Method of making a staple-fiber band
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United States of America Patent
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-
Feb 11, 1986
Grant Date -
N/A
app pub date -
Sep 28, 1982
filing date -
Oct 17, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A staple-fiber band is made by first spinning synthetic-resin filaments with spinnerets and drawing the filaments as roving at a predetermined feed speed from the spinnerets. The roving is then cooled without greatly stretching it so it has relatively high residual stretch and is then stored. Without intermediate treatment the roving is heated to a predetermined temperature and then stretched it to a relatively small residual stretch. The stretched roving is then thermofixed and then stretch-torn. Finally it is textured. During the heating, thermofixing, stretch-tearing, and texturing steps the roving is held under tension so that its filaments cannot tangle. When the filaments are of polyester they are stretched at between 60.degree. C. and 120.degree. C. and thermofixed at a temperature that can be somewhat higher.
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