Title:
複合半透膜および複合半透膜エレメント
Document Type and Number:
Japanese Patent JP6771865
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a composite semipermeable membrane which is excellent in water permeable performance and removal performance, and is also excellent in long-term performance stability when formed into a composite semipermeable element.SOLUTION: A composite semipermeable membrane has a base material, a porous support layer formed on the base material, and a separation function layer formed on the porous support layer. A density of a resin constituting the porous support layer is 1.45 g/cmor more. When porosity of the surface on the separation function layer side of the porous support layer measured using an electron microscope is represented by A[-], and porosity of a cross section at a depth position from the surface on the separation function layer side which is 10% based on a thickness of the porous support layer is represented by B[-], (1) 0.4≤B≤0.6 and (2) 0.8≤A/B≤1.05 are satisfied.SELECTED DRAWING: Figure 1
Inventors:
Yoshiki Okamoto
Shuji Furuno
Kentaro Takagi
Hirosawa Hiroho
Hiroyuki Yamada
Shuji Furuno
Kentaro Takagi
Hirosawa Hiroho
Hiroyuki Yamada
Application Number:
JP2015107213A
Publication Date:
October 21, 2020
Filing Date:
May 27, 2015
Export Citation:
Assignee:
TORAY INDUSTRIES,INC.
International Classes:
B01D69/12; B01D63/00; B01D63/10; B01D69/02; B01D69/10; B01D71/30
Foreign References:
| WO2014192883A1 | ||||
| WO2014208602A1 |