Title:
PRODUCTION OF POLYVINYL ALCOHOL-BASED FIBER
Document Type and Number:
Japanese Patent JP3544090
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce a polyvinyl alcohol fiber, capable of being finely and rapidly fibrillated and easily developable into the field for reinforcing nonwoven fabrics or rubbers by spinning a specific spinning solution into a solidification bath and manufacturing a yarn under specified conditions.
SOLUTION: A solution prepared by dissolving 55-80wt.% polyvinyl alcohol having ≥1,500 polymerization degree and ≥99.5mol% saponification degree and a polymer selected from the group consisting of polyacrylontrile, polymethyl methacrylate and cellulose acetate in dimethyl sulfoxide is spun into a solidification bath consisting essentially of methanol. The dimethyl sulfoxide is then extracted from the fiber until the dimethyl sulfoxide content in the fiber attains ≤2wt.%. Ketones having ≥4 carbon atoms in an amount of ≥5wt.% and water are then applied to the fiber and the resultant fiber is subsequently dried until the solvent content attains ≤50wt.% in a gas containing mthanol at 2-10vol.% concentration and ≤150°C and then drawn to afford a polyvinyl alcohol fiber.
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Inventors:
Shoichi Nishiyama
Yoichi Matsumoto
Isao Sakuragi
Akio Omori
Yoichi Matsumoto
Isao Sakuragi
Akio Omori
Application Number:
JP2252597A
Publication Date:
July 21, 2004
Filing Date:
February 05, 1997
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
D01F6/50; D01F6/14; (IPC1-7): D01F6/50
Domestic Patent References:
| JP8284021A | ||||
| JP9302525A | ||||
| JP10219515A |