Composite elastic yarn
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Oct 1, 1996
Issued Date -
N/A
app pub date -
Jun 2, 1995
filing date -
May 27, 1989
priority date (Note) -
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Abstract
A composite yarn comprising a spandex core yarn and a thermoplastic wrapping yarn in which both yarns are free to extend and contract freely one relative to the other while retaining sufficient cohesion to prevent their separation. The thermoplastics wrapping yarn is polyamide in a flat continuous filament. The wrapping yarn is wrapped in a series of alternating S and Z twists around the spandex core yarn, loops of the wrapping yarn projecting laterally as at positions where a change in the direction of twist occurs.
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