US2014234623A1PendingUtilityA1

Poly(trimethylene arylate) fibers, process for preparing, and fabric prepared therefrom

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Assignee: BATES W DOUGLASPriority: Sep 22, 2011Filed: Sep 22, 2011Published: Aug 21, 2014
Est. expirySep 22, 2031(~5.2 yrs left)· nominal 20-yr term from priority
Inventors:W. Douglas Bates
C08L 67/02D02G 3/045D01F 6/92Y10T428/298
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Claims

Abstract

A fine denier poly(trimethylene arylate) spun drawn fiber is characterized by high denier uniformity. A process for preparing uniform fine denier yarns at spinning speeds of 4000 to 6000 m/min is further disclosed. The poly(trimethylene arylate) fiber hereof comprises 0.1 to 3% by weight of polystyrene dispersed therewithin. Fabrics prepared therefrom are also disclosed.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A filament comprising a composition comprising 0.1 to 3% by weight of polystyrene, based on the total weight of the polymer in the composition, dispersed in poly(trimethylene arylate) wherein the filament is characterized by a denier per filament of ≦3, a denier coefficient of variation of ≦2.5% and a birefringence of at least 0.055. 
     
     
         2 . The filament of  claim 1  wherein the poly(trimethylene arylate) is poly(trimethylene terephthalate). 
     
     
         3 . The filament of  claim 1  wherein the composition comprises 0.5 to 2% by weight of polystyrene, based on the total weight of the polymer in the composition, dispersed in poly(trimethylene arylate). 
     
     
         4 . The filament of  claim 3  wherein the composition consists essentially of 0.5 to 2% by weight of polystyrene, based on the total weight of the polymer in the composition, dispersed in poly(trimethylene arylate). 
     
     
         5 . The filament of  claim 2  wherein the composition comprises 0.5 to 2% by weight of polystyrene, based on the total weight of the polymer in the composition, dispersed in poly(trimethylene terephthalate). 
     
     
         6 . The filament of  claim 2  wherein the composition consists essentially of 0.5 to 2% by weight of polystyrene, based on the total weight of the polymer in the composition, dispersed in poly(trimethylene terephthalate).

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