The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 2009
Filed:
Nov. 01, 2005
Keiichi Yamakawa, Akaiwa-gun, JP;
Takashi Imai, Wake-gun, JP;
Keiichi Yamakawa, Akaiwa-gun, JP;
Takashi Imai, Wake-gun, JP;
Japan Gore-Tex, Inc., Tokyo, JP;
Abstract
A membranethat 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 membraneis a laminated articlecontaining a porous filmand a reinforcing member, and the reinforcing memberhas a moisture-permeable resin layeron the side of an interfacewith the porous film. To reliably form the moisture-permeable resin layer (moisture-permeable resin film), the average pore diameter of the porous filmis preferably 0.01 to 10 μm, and the porosity of the reinforcing memberis preferably 30 to 95%. According to the membraneof 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 γof the reinforcing memberand the critical surface tension γof the porous film(γ−γ) is set in advance to −5 mN/m or greater, the moisture-permeable resin layercan be disposed internally at a specific location.