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. 16, 2011
Filed:
Mar. 07, 2007
Shinichi Chikura, Ibaraki, JP;
Katsumi Ishii, Ibaraki, JP;
Hideki Matsuda, Ibaraki, JP;
Masashi Beppu, Ibaraki, JP;
Hiroki Fujioka, Ibaraki, JP;
Yasuhiro Uda, Ibaraki, JP;
Shinichi Chikura, Ibaraki, JP;
Katsumi Ishii, Ibaraki, JP;
Hideki Matsuda, Ibaraki, JP;
Masashi Beppu, Ibaraki, JP;
Hiroki Fujioka, Ibaraki, JP;
Yasuhiro Uda, Ibaraki, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
An object of the present invention is to provide a spiral membrane element that can form a uniform fiber reinforcement layer on an outer circumferential surface by a simple process without a great change in the materials, as well as a process for producing the same. The spiral membrane element of the present invention is a spiral membrane element which is provided with a cylindrical roll R in which a separation membrane, a feed-side flow passageway member, and a permeate-side flow passageway memberare spirally wound in a laminate state around a perforated center tubeand in which a sealing part for preventing mixing of feed-side fluid and permeate-side fluid is disposed, wherein at least one sheet of the permeate-side flow passageway memberhas a fiber clothextended or connected to the outer circumferential side, and the fiber clothis wound around an outer circumference of said cylindrical roll R, impregnated with a resin and hardened to thereby form a fiber reinforcement layer.