公开(公告)号：US20220080363A1

公开(公告)日：2022-03-17

申请号：US17415854

申请日：2019-09-30

Applicant: TORAY INDUSTRIES, INC.

Inventor： Tomoya YOSHIZAKI ,  Tsuyoshi HAMADA ,  Masami OGATA ,  Harutoki SHIMURA ,  Takafumi OGAWA

IPC: B01D69/12 ,  B01D71/56 ,  B01D69/10 ,  B01D69/02 ,  B01D65/08 ,  B32B27/34

Abstract: The present invention relates to a composite semipermeable membrane including: a substrate; a porous support layer disposed on the substrate; and a separation functional layer disposed on the porous support layer, in which the separation functional layer includes: a first layer including a crosslinked aromatic polyamide; and a coating layer existing on the first layer and including an aliphatic polyamide including a fluorine atom, and the composite semipermeable membrane has a proportion of the number of fluorine atoms to the total number of atoms of all elements of 0.5% or more and 8% or less, and has a ratio (N/O ratio) of the number of nitrogen atoms to the number of oxygen atoms of 0.8 or more and 1.3 or less.