ASSYMETRIC HOLLOW FIBER HEAT EXCHANGERS
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United States of America Patent
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Aug 27, 2015
app pub date -
Feb 24, 2015
filing date -
Feb 24, 2014
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Abstract
A method of making an asymmetric polymeric hollow fiber includes dissolving a polymer in one or more solvents to form a polymer solution, providing the polymer solution to a spinneret or device in which a bore fluid is directed to flow through a first tube surrounded by a larger, second tube through which the polymer solution flows, and co-extruding the polymer solution and bore fluid. The method forms a first, substantially impermeable portion of the asymmetric polymeric hollow fiber and second, porous portion of the asymmetric polymeric hollow fiber.
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