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:
Apr. 27, 2021
Filed:
Sep. 15, 2017
Nitto Denko Corporation, Ibaraki, JP;
Mieko Nishi, Ibaraki, JP;
Yasuhiro Uda, Ibaraki, JP;
Abstract
A spiral membrane element is provided which has a restricted outer diameter but is heightened in effective membrane area, and further which can be decreased in operation energy therefor. The spiral membrane element is an element including plural membrane leaves L in each of which a permeation-side flow-channel memberis interposed between opposed separation membranes; a supply-side flow-channel memberinterposed between any two of the membrane leaves L; a perforated central pipeon which the membrane leaves L and the supply-side flow-channel memberare wound; and sealing parts that prevent a supply-side flow-channel from being mixed with a permeation-side flow-channel. The sealing parts include both-end sealing partsin which an adhesive is used to seal two-side end parts of each of the membrane leaves L on both sides of the leaf in an axial direction Aof the leaf. The thickness Tof the both-end sealing partsis 390 to 540 μm.