B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 69/08 (2006.01) B01D 67/00 (2006.01) B01D 69/10 (2006.01) B01D 69/12 (2006.01) D06B 3/04 (2006.01)
Patent
CA 2478445
The invention relates to a method for producing fabric-reinforced capillary membranes, particularly for ultrafiltration, in which a fabric tube (1) is coated with a polymer solution and is guided through a precipitation bath (6), where the polymer solution is converted into a microporous layer in the precipitation bath (6), and a membrane that is reinforced by the fabric tube is formed. According to the invention, the fabric tube coated with the polymer solution passes through the precipitation bath (6) from top to bottom, without mechanical contact, and exits through a nozzle (7) at the bottom. Liquid flows out of the nozzle (7), which liquid exerts a tensile force stabilizing the course of the coated fabric tube, on the capillary membrane (8) leaving the precipitation bath.
La présente invention concerne un procédé pour produire des membranes capillaires à renfort de tissu, notamment destinées à l'ultrafiltration. Ce procédé consiste à revêtir un tuyau de tissu (1) d'une solution polymère et à le faire passer dans un bain de précipitation (6). Dans ce bain de précipitation (6), la solution polymère se transforme en une couche microporeuse et une membrane renforcée par le tuyau de tissu se forme. Selon cette invention, le tuyau de tissu revêtu de solution polymère passe dans le bain de précipitation (6) sans contact mécanique de haut en bas et traverse une buse inférieure (7). Du liquide s'écoulant à travers ladite buse (7) permet d'exercer sur la membrane capillaire (8) sortant du bain de précipitation une force de traction qui stabilise le passage du tuyau de tissu revêtu.
Schaefer Stefan
Vossenkaul Klaus
Borden Ladner Gervais Llp
Koch Membrane Systems Gmbh
Puron Ag
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