B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 63/02 (2006.01) B01D 19/00 (2006.01) B01D 61/00 (2006.01) B01D 63/04 (2006.01) B01D 69/02 (2006.01) B01D 69/08 (2006.01) B01D 69/12 (2006.01) B01D 71/26 (2006.01) B01D 71/54 (2006.01) B41J 2/175 (2006.01) B41J 2/19 (2006.01) C09D 11/00 (2006.01)
Patent
CA 2289494
The present invention provides a gas-permeable hollow fiber membrane having an inner diameter of 50 to 500 µm and a membrane thickness of 10 to 150 µm, which is preferably a composite hollow fiber membrane having a three-layer structure consisting of a nonporous layer having porous layers disposed on both sides thereof. Dissolved gases present in an ink can be removed by passing the ink through the bores of hollow fibers comprising such a hollow fiber membrane, and evacuating the outer surface side of the hollow fibers. This method makes it possible not only to degas inks with a slight pressure loss, but also to degas inks stably even if pressure changes occur during degassing.
Afin d'éliminer un gaz dissous dans l'encre, on fait passer celle-ci dans les parties creuses d'une membrane constituée de fibres creuses, perméable aux gaz, dont le diamètre interne est compris entre 50 et 500 mu m et l'épaisseur entre 10 et 150 mu m, de préférence dans les parties creuses d'une membrane composite à fibres creuses ayant une structure à trois couches, dans laquelle les couches poreuses sont disposées sur les deux faces d'une couche non poreuse; puis on aspire la surface externe de ladite membrane. Selon ce procédé, la désaération peut s'effectuer avec une faible perte de pression et, de plus, d'une manière stable même quand la pression varie durant l'opération de désaération.
Fukushima Noriaki
Hayashi Seiji
Kobayashi Masumi
Takeda Satoshi
Uchida Makoto
Goudreau Gage Dubuc
Mitsubishi Rayon Co. Ltd.
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