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:
Apr. 28, 1981
Filed:
Aug. 16, 1979
Applicant:
Inventors:
Mitsutaka Uzumaki, Kitaoizumi, JP;
Masahiko Takashio, Fujieda, JP;
Akihisa Shirasaka, Fujieda, JP;
Tadayoshi Utsumi, Fujieda, JP;
Assignee:
Nitivy Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
D02G / ;
U.S. Cl.
CPC ...
428401 ; 81155 ; 264 83 ; 264185 ; 264232 ; 264344 ; 521 27 ; 521 29 ; 521 31 ;
Abstract
Superfine fibers of polyvinyl alcohol type having a single fiber diameter of 0.1-1.0.mu. and a fineness of 0.8-80.times.10.sup.-4 d/f are baked in the presence of a dehydration catalyst so that the weight loss ratio of fibers falls under the range of about 5 to 40%. When ion-exchange radicals are introduced into the partially dehydrated fiber, superfine fibers with a high ion-exchange rate are obtained.