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:
Feb. 25, 1992
Filed:
May. 24, 1990
Masatsugu Mochizuki, Kyoto, JP;
Kazutaka Kooda, Kyoto, JP;
Siro Murakami, Kyoto, JP;
Naohiko Nagata, Kyoto, JP;
Mitsuo Kawaguchi, Kyoto, JP;
Unitika Ltd., Hyogo, JP;
Abstract
A high strength and high initial modulus polyvinyl alcohol monofilament yarn and a process for producing the same with high productivity are disclosed, the monofilament yarn comprising polyvinyl alcohol having a polymerization degree of from 1500 to 7000, having a tensile strength of not less than 10 g/d and an initial modulus of not less than 200 g/d, and having a fineness of 100 denier or more; and the process comprising dry-wet spinning a spinning dope prepared by dissolving polyvinyl alcohol having a polymerization degree of from 1500 to 7000 in a solvent and stretching the resulting unstretched filament, wherein a plurality of filaments immediately after being spun from a spinning nozzle having a plurality of orifices are closely adhered and united into a substantially single strand in an inert atmosphere and then introduced into a coagulating bath or a cooling bath.