Process for making highly permeable coated composite hollow fibe

Details Process for making highly permeable coated composite hollow fibe Process for making highly permeable coated composite hollow fibe

1987-06-11

1988-07-12

Pianalto, Bernard D.

Coating processes

With stretching or tensioning

Running lengths

427177, 427245, 427354, 4273935, 4274347, B05D 3107, B05D 312

Patent

active

047569328

ABSTRACT:
The present invention is a process for applying a highly permeable coating on a hollow fiber substrate. The hollow fiber substrate is continuously passed through a polymeric coating solution and withdrawn from the solution through a coating die to form a uniform polymeric solution coating on the outer surface of the hollow fiber. A portion of the solvent from the coating is allowed to evaporate thereby forming a thin, dense surface layer after which the remaining solvent from the coating layer is leached out. The resultant material is a highly permeable, coated composite hollow fiber membrane which can be used in gas and/or liquid separations.

REFERENCES:
patent: 4214020 (1980-07-01), Ward et al.
patent: 4444662 (1984-04-01), Conover

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