Hollow fiber membrane and method of producing the same

B - Operations – Transporting – 01 – D

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B01D 71/34 (2006.01) B01D 61/16 (2006.01) B01D 65/06 (2006.01) B01D 67/00 (2006.01) B01D 69/02 (2006.01) B01D 69/08 (2006.01) C02F 1/44 (2006.01)

Patent

CA 2433786

A method of producing a hollow fiber membrane includes discharging a polyvinylidene fluoride solution comprising a polyvinylidene fluoride resin and a poor solvent at a temperature above a phase separation temperature into a cooling bath at a temperature below the phase separation temperature to coagulate the polyvinylidene fluoride resin. The hollow fiber membrane comprises a polyvinylidene fluoride resin having spherical structures that have an average diameter in the range of 0.3 to 30 µm.

L'invention porte sur un procédé de production de films de fibres creuses consistant à introduire une solution de résine du type poly (fluorure de vinylidène) dans un solvant léger à sa température de séparation de phase ou plus, dans un bain de refroidissement à la température de séparation de phase ou moins, pour provoquer la coagulation de la résine. L'invention porte également sur les films de fibres creuses ainsi produits lesquelles présentent un diamètre moyen allant de 0,3 à 30 µm. Ledit procédé, économique et ménageant l'environnement, donne un film très résistant chimiquement et physiquement et très perméable à l'eau.

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