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:
Mar. 28, 2017
Filed:
Jun. 11, 2008
Shinichi Chikura, Ibaraki, JP;
Yuuji Nishida, Ibaraki, JP;
Yasuhiro Uda, Ibaraki, JP;
NITTO DENKO CORPORATION, Osaka, JP;
Abstract
A spiral membrane element that can reduce the dimension increase in the length direction is provided. Also, a method for producing a spiral membrane element is provided having a step of forming a fiber reinforced resin layer having a reinforcing fiber layer and a strengthening fiber layer. The spiral membrane element is provided with a cylindrical wound body in which a separation membrane, a feed-side channel material, and a permeate-side channel material in a laminated state are wound in a spiral form around a center tube having a hole, and a sealing part for preventing feed-side fluid and permeate-side fluid from being mixed with each other, wherein a fiber reinforced resin layer having a reinforcing fiber layer and a strengthening fiber layer enclosed and buried with the same resin is provided on an outer circumferential side of the cylindrical wound body.