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:
Aug. 09, 1983
Filed:
Oct. 27, 1980
Kazuhisa Saito, Shizuoka, JP;
Hiroyasu Ogawa, Shizuoka, JP;
Toho Belson Co., Ltd., Tokyo, JP;
Abstract
An acrylonitrile based fiber is disclosed which is composed of copolymers comprising at least 96 mole % of acrylonitrile and 1.times.10.sup.-2 to 70.times.10.sup.-2 mole % of a vinyl component or vinyl components containing acidic groups, and containing a specific amount of zinc. The fiber is used in production of oxidized or flame resistant fiber. The oxidized or flame resistant fiber is produced by heat-treating or oxidizing the acrylonitrile based fiber in an oxidation furnace equipped with a plurality of roller units while limiting the shrinkage of the acrylonitrile based fiber within specific limits as the oxidation proceeds. On carbonizing the above oxidized or flame resistant fiber while limiting the shrinkage thereof a carbon fiber which is of high strength and low fluffing is obtained.