An apparatus and method of producing porous membranes

Details An apparatus and method of producing porous membranes An apparatus and method of producing porous membranes

B - Operations, Transporting

01

D

B01D 69/02 (2006.01) B01D 39/10 (2006.01) B01D 39/20 (2006.01) B01D 61/18 (2006.01) B01D 63/06 (2006.01) B01D 67/00 (2006.01) B01D 69/04 (2006.01) B01D 69/12 (2006.01) B01D 71/02 (2006.01) B22F 3/20 (2006.01)

Patent

CA 2670147

The present invention relates to an apparatus and method of producing lengths of multi-layered asymmetric membrane (10) by way of extruding different feedstock through a die head (46,78) having a plurality of outlet ports. The membrane (10) includes a plurality of apertures extending therethrough, and at least some of said apertures increase in cross-sectional area from a first surface of the membrane to a second surface of the membrane. The present invention provides a method of constructing membrane in desired lengths and reduces the need to weld portions of membrane together to produce extended lengths of membrane tube.

L'invention concerne un appareil et un procédé pour produire des longueurs de membrane (10) asymétrique multicouches, comprenant l'extrusion de différentes matières premières à travers une tête d'extrudeuse (46, 78) présentant une pluralité d'orifices de sortie. La membrane (10) comprend une pluralité d'orifices traversants, et certains de ces orifices augmentent en taille, en vue transversale, d'une première surface de la membrane vers une seconde surface de la membrane. L'invention concerne un procédé de fabrication de la membrane à des longueurs souhaitées et elle est caractérisée en ce qu'elle réduit la nécessité de parties soudées de la membrane, pour produire des longueurs d'un tube à membranes.

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