Polyhexamethylene adipamide yarn
AssigneeE. I. DuPont de Nemours and Company
InventorEarl Blaine Adams
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Abstract
Polyhexamethylene adipamide feed yarn for false-twist texturing by combined draw-texturing processes is prepared by high-speed spinning under controlled conditions to have improved stability, low shrinkage, good tenacity and uniformity. The feed yarn has break elongation and birefringence values particularly suitable for draw-texturing.
Claims6
A polyhexamethylene adipamide yarn characterized by a break elongation of 50 to 115 percent, a tenacity of at least about 2.5 grams per denier, a birefringence value of at least 0.040, a boil-off shrinkage of 2 to 6 percent, and a value for Ts.sub.140 -Ts.sub.90 of at least +0.1 in percentage units.
Dependencies are inferred from the claim text.