| 摘要 |
<p>PURPOSE:To obtain a permselective gas permeable membrane having high mechanical strength wherein its gas permeation factor and separation factor are well balanced by providing a permselective gas permeable polymer layer between porous substrate layers. CONSTITUTION:Polymer layers having permselective permeability such as silicone, siloxane copolymer, polyphenylene oxide, etc., are provided between porous substrate layers such as polyolefin, cellulose acetate, porous alumina etc., in such a way that a plurality of porous substrats are superposed upon each other with small clearances therebetween impregnated with polymer layer raw material to be dried and solidified, or polymer layer raw material is applied to the surfaces of porous substrata so that the coated surfaces are superposed upon each other to be pressed, dried, and solidified. The permselective gas permeable membranes so obtained have a high mechanical strength and allow oxygen gas etc. to be selectively passed therethrough efficiently, wherein their gas permeation factor and separation factor are well balanced.</p> |
