Continuous process for making coated composite hollow fiber...

Details Continuous process for making coated composite hollow fiber... Continuous process for making coated composite hollow fiber...

B - Operations, Transporting

01

D

117/105, 117/88.

B01D 67/00 (2006.01) B01D 69/08 (2006.01) B01D 69/12 (2006.01)

Patent

CA 1333028

The present invention is a process for applying a semi-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 The hollow fiber substrate is continuously passed through a polymeric coating solution and withdrawn from the solution through a coating die to form a uniform polymeric solution coating on the outer surface of the hollow fiber. The coated hollow fiber is dried by passing it through a convective flow tunnel in which the rate of drying is controlled both by a pre-determined temperature profile in the tunnel and by a controlled air flow rate through the tunnel. The resultant material is a semi-permeable, coated composite hollow fiber membrane which can be used in gas and/or liquid separations.

591307

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