Japan, Sept. 18 -- NITTO DENKO CORP has got intellectual property rights for 'COMPOSITE SEMIPERMEABLE MEMBRANE AND SPIRAL MEMBRANE ELEMENT.' Other related details are as follows:
Application Number: JP,2022-204169
Category (FI): B01D69/12,B01D69/10,B01D71/56,B01D63/10,B01D69/00
Stage: PROBLEM TO BE SOLVED: To provide: a composite semipermeable membrane capable of enhancing adhesion between a separation functional layer provided with a coating layer and a protective tape while maintaining an effect of the coating layer to some extent; and a spiral membrane element using the same.SOLUTION: A composite semipermeable membrane includes: a porous support; a separation functional layer formed on the porous support; and a coating layer, which is provided on a surface of the separation functional layer, having different surface roughness values due to different adhesion amounts of a coating material depending on locations. The composite semipermeable membrane has a coating layer-side surface on which a glossy portion having a surface roughness Ra of 30 nm or less and a non-glossy portion having a surface roughness Ra of 50 nm or more are provided.SELECTED DRAWING: Figure 3 (Grant)
Filing Date: Dec. 21, 2022
Publication Date: Oct. 6, 2023
The original document can be viewed at: https://www.j-platpat.inpit.go.jp/p0100
Disclaimer: Curated by HT Syndication.
