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:
Jul. 13, 1999
Filed:
Mar. 25, 1997
Applicant:
Inventors:
Assignee:
Toray Industries, Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; B32B / ;
U.S. Cl.
CPC ...
528310 ; 528170 ; 528322 ; 528332 ; 528335 ; 528336 ; 428395 ; 428396 ;
Abstract
A highly hygroscopic polyamide fiber formed from a polyamide compound containing a polyvinylpyrrolidone (in an amount of 3-15 wt %) which is synthesized in isopropyl alcohol as a solvent, contains pyrrolidone in an amount less than 0.1 wt %, and has a K-value of 20-70. This fiber contains pyrrolidone in an amount less than 0.1 wt % of the amount of polyvinylpyrrolidone. This fiber is characterized by a yellowness index lower than 10 before dyeing, a large difference between the maximum moisture absorptivity and the standard moisture absorptivity, and a low content of water-soluble components that are subject to leaching.