Process of making mixed shrinkage yarn
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United States of America Patent
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Jun 29, 1993
Issued Date -
N/A
app pub date -
Nov 1, 1991
filing date -
Jan 30, 1986
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Abstract
A process of making mixed shrinkage yarn, including drawing, especially cold-drawing, or hot-drawing or other heat-treatments of spin-oriented crystalline polyester filaments, and particularly polyester feed yarns, that have been prepared by spinning at speeds of, e.g., 4 km/min, and have low shrinkage and no natural draw ratio in the conventional sense, that provides useful technique for obtaining uniform drawn filaments of desired denier and of differential shrinkage, and thereby provides improved flexibility to obtain filaments and yarns of mixed shrinkage.
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