Process of making a module including a polysulphonic hollow fibe

Details Process of making a module including a polysulphonic hollow fibe Process of making a module including a polysulphonic hollow fibe

1994-12-06

1997-06-24

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Extrusion molding

264 41, 264150, 264178F, 264184, 2642091, 264250, 264261, D01D 5247

Patent

active

056414501

ABSTRACT:
A hollow polysulfonic fiber intended for a selectively transmissive membrane contains a hydrophilic polymer which is cross-linked into a water-insoluble form (for example polyvinylpyrrolidone) and is used in the form of a hydrogel containing water. A method for the production of a membrane module consists in spinning a hollow fiber by the use of a spinning solution containing a polysulfonic resin and a hydrophilic polymer, wetting the fiber above the saturated moisture content, and then, with the wet condition maintained, subjecting the fiber to the processes of module molding and radiation induced cross-linking, these processes being performed in either order. The method provides a selectively transmissive hollow polysulfone fiber membrane which displays less elution into water and a sharp molecular weight fractionation, so as to be usable safely in the fields of medicine and foodstuffs.

REFERENCES:
patent: 4268650 (1981-05-01), Rose
patent: 4720343 (1988-01-01), Walch et al.
patent: 4798847 (1989-01-01), Roesink et al.
patent: 4906375 (1990-03-01), Heilmann
patent: 5019261 (1991-05-01), Stengaard
Translation Of Japan 63-97,205 (Published Apr. 27, 1988).

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