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:
Dec. 17, 2013
Filed:
Sep. 01, 2005
Atsushi Hiro, Ibaraki, JP;
Hiroki Fujioka, Ibaraki, JP;
Atsuhito Koumoto, Ibaraki, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
A spiral reverse osmosis membrane element that improves impregnation property of a sealing resin at edges of a membrane leaf and can effectively prevent micro-leaks. The spiral reverse osmosis membrane element comprises a cylindrically wound body comprising a perforated core tube and, spirally wound therearound, a separation membrane, a feed-side passage material and a permeation-side passage material in a laminated state, and a sealing portion for preventing a feed-side liquid and a permeation-side liquid from being mixed together, wherein the separation membrane facing the permeation-side passage material has a structure that a porous support and a skin layer are successively laminated on a non-woven fabric layer, and the sealing portion sealed with a sealing resin is provided at the edges of the separation membrane, wherein the separation membrane is impregnated with the sealing resin at least up to the vicinity of the skin layer through the porous support.