Microporous hollow fiber membranes from perfluorinated thermoplastic polymers
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United States of America Patent
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Oct 12, 2004
Grant Date -
N/A
app pub date -
Jul 26, 2001
filing date -
Jan 29, 1999
priority date (Note) -
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Abstract
High flux porous hollow fiber membranes are produced from perfluorinated thermoplastic polymers by extruding a heated solution of the polymer having a lower critical solution temperature directly into a cooling bath to form the porous membrane by liquid-liquid phase separation. Extrusion can be conducted either vertically or horizontally.
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