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:
May. 05, 1992
Filed:
Apr. 20, 1990
Hiroshi Narukawa, Soja, JP;
Akio Mizobe, Okayama, JP;
Fumio Nakahara, Kurashiki, JP;
Akira Kubotsu, Soja, JP;
Akitsugu Akiyama, Soji, JP;
Masakazu Nishiyama, Okayama, JP;
Kenji Nagamatu, Kurashiki, JP;
Hirotoshi Miyazaki, Kurashiki, JP;
Kuraray Company Limited, Kurashiki, JP;
Abstract
Provided is a high-performance PVA fiber and its production. Each filament of the PVA fiber of the present invention having a structure comprising an aggregate of substantially innumerable fibrils, the fiber has high strength, elastic modulus, and resistances to fatigue, hot water and chemicals and can be pulpified while keeping its excellent features such as high strength. The PVA fiber of the present invention cannot, even drawn to a high ratio, be readily whitened by virtue of its fibril-aggregate structure, and can hence be made still higher in performances. The PVA fiber can be obtained by adding to a PVA solution a relatively large amount of surface active agent, and wet or dry-jet-wet spinning the thus prepared dope solution into an aqueous alkaline coagulating bath.