Title:
SKINNED HOLLOW FIBER MEMBRANE AND METHOD OF MANUFACTURE
Document Type and Number:
WIPO Patent Application WO2000044482
Kind Code:
A3
Abstract:
Hollow fiber membranes having a skinned surface on one diameter, and a porous surface on the opposite diameter 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. The hollow fiber membranes are useful as ultrafiltration membranes and as membrane contactors.
Inventors:
CHENG KWOK-SHUN (US)
GATES T DEAN (US)
YEN LARRY Y (US)
PATEL RAJNIKANT B (US)
GATES T DEAN (US)
YEN LARRY Y (US)
PATEL RAJNIKANT B (US)
Application Number:
PCT/US2000/002194
Publication Date:
December 28, 2000
Filing Date:
January 27, 2000
Export Citation:
Assignee:
MILLIPORE CORP (US)
CHENG KWOK SHUN (US)
GATES T DEAN (US)
YEN LARRY Y (US)
PATEL RAJNIKANT B (US)
CHENG KWOK SHUN (US)
GATES T DEAN (US)
YEN LARRY Y (US)
PATEL RAJNIKANT B (US)
International Classes:
B01D61/18; B01D63/02; B01D67/00; B01D69/08; B01D69/12; B01D71/32; B01D71/36; D01D5/24; D01F6/12; D01F6/32; (IPC1-7): B01D69/08; B01D71/36; D01D5/24
Foreign References:
| US5490931A | 1996-02-13 | |||
| FR2566003A1 | 1985-12-20 | |||
| US4902456A | 1990-02-20 | |||
| US4990294A | 1991-02-05 |
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