MANUFACTURING METHOD FOR SEPARATION FILM AND SEPARATION FILM

WIPO Patent Application WO/2022/196306

A1

The present invention provides a manufacturing method for a separation film that is suitable for transferring a separation functional layer and an intermediate layer to a porous support from a release liner. A manufacturing method according to the present invention is for a separation film 10 including a separation functional layer 1, a porous support 3, and an intermediate layer 2. Said manufacturing method includes: forming an intermediate layer 2 on a first laminate 15 having a release liner 5 and a separation functional layer 1; forming a third laminate 17 by pasting together the intermediate layer 2 of a second laminate 16, which has the release liner 5, the separation functional layer 1, and the intermediate layer 2 in this order, with a porous support 3; and removing the release liner 5 from the third laminate 17. With the manufacturing method, the intermediate layer 2 is formed so that the ratio R of the bonding strength A2 (N/50 mm) between the intermediate layer 2 and the porous support 3 with respect to the bonding strength A1 (N/50 mm) between the release liner 5 and the separation functional layer 1 is equal to or greater than 3.1.

TANI KENSUKE (JP)
IWASAKI DAIKI (JP)
SHIMIZU HISAE (JP)
SAYAMA SHUNSUKE (JP)

PCT/JP2022/008061

September 22, 2022

February 25, 2022

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NITTO DENKO CORP (JP)

B01D67/00; B01D69/10; B01D69/12; B01D71/34; B01D71/64; B01D71/68; B32B37/02

WO2016178323A1	2016-11-10
WO2016178324A1	2016-11-10

JP2019089034A	2019-06-13
JP2020163375A	2020-10-08
JP2019501010A	2019-01-17
JP2014184424A	2014-10-02
JP2014024004A	2014-02-06

E. KAMIO ET AL., ADV.MATER, vol. 29, 2017, pages 1704118

KAMADA Koichi et al. (JP)

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