Hollow fibres

Details Hollow fibres Hollow fibres

1975-06-03

1977-11-01

Spear, Jr., Frank A.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210321R, 210500M, B01D 1300

Patent

active

040564673

ABSTRACT:
A hollow fiber is provided possessing a continuous longitudinally extending channel free from macromolecular material, said fiber consisting essentially of a copolymer of acrylonitrile and an olefinically unsaturated comonomer containing an optionally salified sulphonic acid group, and possessing micropores of average diameter less than about 100 A, between 40% and 80% of walls of the fiber being empty space. This fiber can be prepared by injecting a solution of a copolymer of acrylonitrile and an olefinically unsaturated comonomer containing an optionally salified sulphonic acid group in at least one polar organic solvent into a spinneret with an annular orifice, and immediately coagulating the inside and the outside of the nascent hollow fibre issuing from the spinneret with a coagulating fluid which is selected from:

REFERENCES:
patent: 3228877 (1966-01-01), Mahon
patent: 3342729 (1967-09-01), Strand
patent: 3423491 (1969-01-01), McLain et al.
patent: 3526588 (1970-09-01), Michaels et al.
patent: 3616930 (1971-11-01), Muir
patent: 3674628 (1972-07-01), Fabre
patent: 3750735 (1973-08-01), Chiang et al.
patent: 3773848 (1973-11-01), Perry et al.
patent: 3799356 (1974-03-01), Salyer et al.
patent: 3819742 (1974-06-01), Brun et al.
Osborn et al., Def. Pub., published Mar. 9, 1971, 884 O. G. 433.

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