Method of making improved polyester filaments, yarns and tows
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United States of America Patent
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Sep 14, 1993
Issued Date -
N/A
app pub date -
Nov 1, 1991
filing date -
Jan 30, 1986
priority date (Note) -
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Abstract
Air-jet texturing with 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, provides useful technique for obtaining uniform drawn filaments of desired denier and thereby provides improved flexibility to obtain air-jet textured filaments and yarns of various denier. The resulting yarns have useful properties that are improved in certain respects.
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