Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1980-12-08
1982-04-06
Woo, Jay H.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
2105002, 264 41, 264561, 264187, 264203, 2642091, D02G 300
Patent
active
043236278
ABSTRACT:
A method of manufacturing a hollow fiber which comprises providing a spinning solution of a water miscible organic solvent and a high molecular weight compound which may be polyacrylonitrile, a copolymer of acrylonitrile, alpha cellulose, a cellulose ester, polymethylmethacrylate, poly vinyl chloride, or poly-.gamma.-benzyl glutamate. This spinning solution is extruded through an annular slit while simultaneously, an alkaline or acid aqueous salt solution is extruded from an orifice encircled by the annular slit. The aqueous salt solution has a salt content of 15 to 50% by weight and there is sufficient alkali or acid present in the aqueous salt solution to effect controlled hydrolysis of the high molecular weight compound.
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Nippon Zeon Co. Ltd.
Woo Jay H.
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