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US 5,471,828 AGranted
Hot feed draw texturing for dark dyeing polyester
AssigneeWellman, Inc.
InventorCharlie King
Life of this patent
Estimating the term…
Abstract
A method for increasing the dyeability of polyester yarn comprising heating the partially oriented yarn to a temperature between its crystallization temperature and its melting point while preventing the partially oriented yarn from shrinking, and immediately thereafter draw texturizing the partially oriented yarn to a desired draw ratio and texturization.
Claims16
A method of increasing the dyeability of polyester yarn, the method comprising:
- heating the yarn to a temperature between its crystallization temperature and its melting point while preventing the yarn from shrinking;
- and
- immediately thereafter draw texturizing the heated yarn at a draw ratio above the natural draw ratio.
A method of thermally inducing increased crystallinity in polyester yarn and resultingly increasing the dyeability of the polyester yarn, the method comprising:
- drawing a partially oriented polyester yarn from a supply;
- heating the partially oriented yarn to a temperature between its crystallization temperature and its melting point while preventing the partially oriented yarn from shrinking;
- and
- immediately thereafter false twist draw-texturizing the heated partially oriented yarn at a draw ratio above the natural draw ratio.
1 more element
Dependencies are inferred from the claim text.