Method to make yarn-reinforced hollow fiber membranes around a soluble core

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United States of America Patent

PATENT NO 9221020
APP PUB NO 20130168007A1
SERIAL NO

13823183

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Abstract

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Disclosed is the method for creating a reinforced hollow fiber membrane by applying reinforcing filaments to a core, casting a dope over the filaments and core, forming a membrane from the dope, and removing the core. The core may be a moving core, and the reinforcing yarns may comprise warp yarns and a spiral wrap yarn. The core may be soluble and removed by dissolving it. The core may be pre-wrapped with a yarn before the warp yarns are applied. The resulting reinforcing cage may be pre-shrunk before it is coated with a membrane dope. The pre-wrapped yarn may be removed, for example by dissolving it, after the reinforcing cage is coated. A precursor assembly for making a hollow fiber membrane is also provided.

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Patent Owner(s)

Patent OwnerAddress
BL TECHNOLOGIES INCMINNETONKA MN 55343

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cote, Pierre Oakville, CA 49 2101
Pedersen, Steven Kristian Burlington, CA 51 1259

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