Gas separation: apparatus – Apparatus for selective diffusion of gases – Plural layers
Reexamination Certificate
2005-11-01
2009-08-11
Greene, Jason M (Department: 1797)
Gas separation: apparatus
Apparatus for selective diffusion of gases
Plural layers
C096S004000, C096S012000, C096S013000, C096S014000, C095S052000, C055SDIG007, C210S640000, C210S500270, C210S500280, C165S060000, C261S158000, C427S372200, C427S407100, C427S412100
Reexamination Certificate
active
07572321
ABSTRACT:
A membrane12that exhibits superior condensation resistance regardless of the type of moisture-permeable resin, that has satisfactory adhesion between a porous film and a reinforcing member, and that can be manufactured in a simple manner.The membrane12is a laminated article23containing a porous film20and a reinforcing member40, and the reinforcing member40has a moisture-permeable resin layer30on the side of an interface50with the porous film20. To reliably form the moisture-permeable resin layer (moisture-permeable resin film)30, the average pore diameter of the porous film20is preferably 0.01 to 10 μm, and the porosity of the reinforcing member40is preferably 30 to 95%. According to the membrane12of the present invention, even if the moisture-permeable resin is water-soluble (for example, polyvinyl alcohol), condensation resistance is still satisfactory. If the difference between the critical surface tension γc2of the reinforcing member40and the critical surface tension γc1of the porous film20(γc2−γc1) is set in advance to −5 mN/m or greater, the moisture-permeable resin layer30can be disposed internally at a specific location.
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Imai Takashi
Yamakawa Keiichi
Ellis Richard W.
Greene Jason M
Japan Gore-Tex Inc.
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