Hollow fiber membrane for the degassing of inks, ink...

Details Hollow fiber membrane for the degassing of inks, ink... Hollow fiber membrane for the degassing of inks, ink...

2005-02-22

2005-02-22

Fortuna, Ana (Department: 1723)

Gas separation: processes

Selective diffusion of gases

Selective diffusion of gases through substantially solid...

C210S500230, C210S490000, C106S031430

Reexamination Certificate

active

06858063

ABSTRACT:
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.

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