Hollow fiber annealing
AssigneeBend Research, Inc.
InventorsWalter C. Babcock, Scott B. McCray, Edward D. LaChapelle, Kris A. Krichko
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Abstract
A process for improving both the internal burst strengths and gas and water permeabilities of certain microporous polymeric hollow fibers useful in RO applications comprises a wet annealing process for certain such fibers.
Claims2
A process for increasing both the internal burst pressure and the gas and water permeability of a lumen-side feed microporous polymeric hollow fiber made from a polymer selected from polysulfones, polyethersulfones and polyetherimides, said process comprising heating said hollow fiber in water at a temperature from 70.degree. C. to 160.degree. C.
A process for increasing both the internal burst pressure and the gas and water permeability of a lumen-side feed microporous polymeric hollow fiber made from polyvinylideneflourides, said process comprising heating said hollow fiber in water at approximately 95.degree. C.
Dependencies are inferred from the claim text.