Aromatic polysulfone type resin hollow fiber membrane and proces

Details Aromatic polysulfone type resin hollow fiber membrane and proces Aromatic polysulfone type resin hollow fiber membrane and proces

1983-01-28

1984-11-06

Kendell, Lorraine T.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

2105002, 264 41, D02G 300

Patent

active

044812604

ABSTRACT:
An aromatic polysulfone type resin hollow fiber membrane having a thickness of less than 100 .mu.m and a three-layer structure of inner and outer surface skin layers and a void layer disposed therebetween and connected thereto. The hollow fiber membrane of the kind has an improved burst strength, while exhibiting an extremely excellent water permeability. Such a hollow fiber membrane can be produced by a process which comprises extruding a spinning solution of an aromatic polysulfone type resin in an organic polar solvent for said resin, said solution containing a glycol and having a resin concentration of from 10 to 35% by weight, from an annular spinning nozzle of which the orifice width is 10 to 110 .mu.m while simultaneously injecting an internal coagulating liquid into the annular spinning nozzle at an inside bore thereof, thereby to obtain an extrudate in the form of a hollow fiber, and introducing said extrudate into an external coagulating liquid.

REFERENCES:
patent: 3691068 (1972-09-01), Cross
patent: 4061821 (1977-12-01), Hayano et al.
patent: 4208508 (1980-06-01), Hashino et al.
patent: 4286015 (1981-08-01), Yoshida et al.
Cabasso, Klein and Smith, Polysulfone Hollow Fibers I, Spinning and Properties, Journal of Applied Polymer Science, vol. 20, pp. 2377-2394, (1976).
Cabasso, Klein and Smith, Polysulfone Hollow Fibers II, Morphology, Journal of Applied Polymer Science, vol. 21, pp. 165-180, (1977).

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