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:
Sep. 06, 1983
Filed:
Jun. 04, 1981
Applicant:
Inventors:
Assignee:
Teijin Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
5283082 ; 2641 / ; 528293 ; 528294 ; 528295 ;
Abstract
A deep-dyeable polyester fiber of soft hand comprising recurring units consisting mainly of ethylene terephthalate and --SO.sub.3 M groups in which M is an alkali metal, and having a degree of crystallinity .chi..sub..rho. of from 30 to 55%, a degree of orientation .DELTA.n of from 0.06 to 0.12 and .chi..sub..rho. /.DELTA.n of from 350 to 550. The fiber can be produced by heat treating a melt spun, slightly oriented filament under relaxation and then drawing the heat treated filament at a low temperature.