Process of making mixed filament yarn
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United States of America Patent
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Jun 29, 1993
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app pub date -
Nov 1, 1991
filing date -
Jan 30, 1986
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Abstract
A process of making mixed filament yarns, involving 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 filaments of desired denier and thereby provides improved flexibility to obtain filaments and yarns mixed with nylon filaments.
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