Claims
- 1. A hollow fiber porous membrane comprising a perfluorinated thermoplastic polymer having an essentially skinless surface on at least one surface and characterized by an IPA flow time of less than about 3000 seconds to pass 500 ml isopropyl alcohol through said membrane, said membrane formed by an extrusion process using no air gap.
- 2. The membrane of claim 1 wherein said membrane is asymmetric.
- 3. The membrane of claim 1 or 2 wherein the IPA flow time is less than about 2000 seconds.
- 4. The membrane of claim 1 or 2 wherein the IPA flow time is less than about 1500 seconds.
- 5. The membrane of claim 1 or 2 wherein said perfluorinated thermoplastic polymer is poly(tetrafluoroethylene-co-perfluoro(alkylvinylether)) or poly(tetrafluoroethylene-co-hexafluoropropylene).
- 6. The membrane of claim 5, wherein the alkyl of said poly(tetrafluoroethylene-co-perfluoro(alkylvinylether)) is propyl, methyl, or blends of methyl and propyl.
Parent Case Info
This application claims the benefit of Provisional Application No. 60/117,852, filed Jan. 29, 1999.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/US00/02198 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO00/44484 |
8/3/2000 |
WO |
A |
US Referenced Citations (15)
Foreign Referenced Citations (16)
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Non-Patent Literature Citations (1)
Entry |
Derwent Publication XP-002142276 Abstract of JP 04 354521. |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/117852 |
Jan 1999 |
US |