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US 4,287,713 AGranted
Process for low-torque textured yarn
AssigneeMonsanto Company
InventorsJames E. Bromley, Frank Stutz
Life of this patent
Estimating the term…
Abstract
Spun yarn having torqueless latent crimp is draw-textured, producing a drawn textured yarn which is substantially torque-free.
Claims3
A process for producing a low-torque textured polyester yarn, comprising:
- a. selecting a spun polyester yarn having an elongation of 55-195% and having sufficient torqueless latent crimp to provide when hot-drawn at 200.degree. C. to an elongation of 30% a bulk of at least 8%, and
- b. draw-texturing said spun yarn at a temperature above the second order transition temperature to a drawn yarn having a denier of at least 250 and an elongation between 10 and 45%.
Dependencies are inferred from the claim text.