Method for manufacture of hollow fiber

Details Method for manufacture of hollow fiber Method for manufacture of hollow fiber

1982-05-25

1984-04-24

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264199, 2642091, B29D 2700

Patent

active

044447167

ABSTRACT:
A method for the manufacture of a hollow fiber which comprises extruding a cellulosic spinning dope through an annular spinning nozzle directly into a non-coagulative liquid layer in a bath filled in the upper layer with a coagulative liquid relative to said spinning dope and in the lower layer with a non-coagulative liquid of a halogenated hydrocarbon and, at the same time, introducing a non-coagulative liquid relative to said spinning dope into the inner center of the tubularly extruded thread of spinning dope, and subsequently passing the resultant tubular fiber of spinning dope through said coagulative liquid thereby coagulating and regenerating the fiber.

REFERENCES:
patent: 1119155 (1914-12-01), Hartoss
patent: 3448185 (1969-06-01), Sims
patent: 3822333 (1974-07-01), Harata et al.
patent: 4086418 (1978-04-01), Turbak et al.
patent: 4141942 (1979-02-01), Maehara
patent: 4289723 (1981-09-01), Leoni et al.
patent: 4342711 (1982-08-01), Loh et al.

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