04882223 is referenced by 51 patents and cites 11 patents.

Non symmetrical hollow fibres presenting a relatively dense layer (`skin`) (H) of a very small thickness (<1 .mu.m) at their outer periphery, which is bound to a so called `open` structure of which the porosity increases in the direction to the inner face; said porous structure comprises microvoids (1) shaped like elongate fingers open to the inside. The invention also relates to the method for obtaining such a symmetrical hollow fibres by known spinning techniques by dry-wet process, by adding to the solution for spinning the polymer in the solvent at least one particular additive and by adding a particular fluid through the hole of the extruded product. Finally, the invention aims at applying the hollow fibres in question to various fields and particularly in ultra-filtration or micro-filtration, in dialysis, reverse osmosis, in gas permeation or pervaporation or they may also be used as supports for liquid membranes.

Title
Hollow fibers production method thereof and their applications particularly in the field of membrane-type separations
Application Number
841537
Publication Number
4882223
Application Date
October 30, 1987
Publication Date
November 21, 1989
Inventor
Jean Michel Espenan
Toulouse
FR
Philippe Aptel
Toulouse
FR
Agent
Browdy and Neimark
Assignee
Centre National de la Recherche Scientifique
FR
Institut National de Recherche Chimique Appliquee
FR
IPC
D02G 3/00
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