The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2001
Filed:
Jun. 07, 2000
Applicant:
Inventors:
Assignee:
Toray Industries, Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01F 6/00 ; D01F 8/00 ;
U.S. Cl.
CPC ...
D01F 6/00 ; D01F 8/00 ;
Abstract
A soft stretch yarn substantially comprising polyester fibers has a stress, at 50% yarn stretch, of no more than 30×10,cN/dtex and, at the same time, a percentage recovery of at least 60%. Preferably, the Uster unevenness is no more than 2.0% and the crimp diameter is no more than 250 &mgr;m. This soft stretch yarn can be produced by spinning yarn of conjugate fibers comprising two types of polyester in which one component is PTT at a take-up velocity of at least 1200 m/min, drawing at a drawing temperature of 50 to 80° C. at a draw ratio such that the drawn yarn tensile elongation is 20 to 45%, and then heat setting.