C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
18/15
C08J 9/28 (2006.01) B01D 67/00 (2006.01) B01D 69/08 (2006.01) B29C 47/20 (2006.01) B29C 47/88 (2006.01) D01D 5/24 (2006.01)
Patent
CA 2002799
A process for making a polymeric, pprous hollow fibre (21) by heating a mixture of a tharmapluatic polymer and a solvent to a temperature and for a times far the polymer and solvent to mutually dissolve, then introducing the molten mixture into an extrusion head (Fid. 1) adapted to shape the hallow fibre. The shaped fibre is then cooled in the extrusion head to a temperature so that non-equilibrium liquid-liquid phase separation takes place to farm a bi-continuous matrix of the polymer and solvent in which the polymer and solvent form two intermingled separate phases of large intorfacihl surface area. Finally, the solvent is removed from the polymer. The extrusion head for forming the abovementioned palymeric, porous hollow fibre has an elongated body (17, 18) defining an axial passageway (11) for receiving a lumen-forming fluid (14) and a first annular passage (12) therearound for receiving the molten mixture (15) from which the hollow fibxe (21) is formed. A second annular passageway (23) is radially outward of the first annular passageway (12) and receives a coating fluid (16). A third annular passageway (19) receives a cooling fluid and has means (20) for directing the cooling fluid towards the outer surface of the coating fluid (16). The porous polymeric material of the fibre produced by the abavementioned process has a lacey or filamentous structure consisting of a plurality of polymer strands connected together at spaced apart locations along each strand.
Khoo Paul S.
Kopp Clinton V.
Streeton Robert J. W.
Bull Housser & Tupper Llp
Memtec Limited
Siemens Water Technologies Corp.
LandOfFree
Extrusion of hollow fibre membranes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Extrusion of hollow fibre membranes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extrusion of hollow fibre membranes will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-2050693