Different shrinkage mixed yarn and method of producing such
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United States of America Patent
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Jan 12, 1999
Grant Date -
N/A
app pub date -
Sep 22, 1997
filing date -
Sep 23, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A different shrinkage mixed yarn is produced using core and effect yarns, which are selected from the same or different polymer and have different thermal shrinkage percentages. The core and effect yarns, which are spun from different spinnerets of a spin draw spinning machine, are doubled and interlaced into a mixed yarn prior to being taken up by a take-up machine, with the core yarn passing through a direct drawing yarn passage and the effect yarn passing through a bypassed yarn passage. The core yarn is drawn and thermally fixed due to a difference in the rotating speed between first and second godet rollers, while the effect yarn is drafted due to the rotating speed of the take-up machine so that the effect yarn has properties of a POY.
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