Title:
半透膜及び半透膜の製造方法
Document Type and Number:
Japanese Patent JP6862642
Kind Code:
B2
Abstract:
A semipermeable membrane according to an embodiment of the present invention includes a semipermeable membrane layer containing an amorphous resin as a main component, and a sheet-like supporting body that supports the semipermeable membrane layer. The supporting body has a porous first supporting layer and a porous second supporting layer laminated on one of surfaces of the first supporting layer. The second supporting layer has a smaller mean flow pore diameter than the first supporting layer. The second supporting layer is impregnated with the semipermeable membrane layer. A ratio of the mean flow pore diameter of the second supporting layer to the mean flow pore diameter of the first supporting layer is preferably 1/1,000 or more and 1/5 or less. The mean flow pore diameter of the first supporting layer is preferably 0.05 µm or more and 20 µm or less, and the mean flow pore diameter of the second supporting layer is preferably 0.01 µm or more and 1 µm or less.
Inventors:
Fumihiro Hayashi
Yasuhiko Murotani
Yasuhiko Murotani
Application Number:
JP2016105299A
Publication Date:
April 21, 2021
Filing Date:
May 26, 2016
Export Citation:
Assignee:
Sumitomo Electric Fine Polymer Co., Ltd.
International Classes:
B01D69/00; B01D69/10; B01D69/12; B01D71/32; B32B5/32; B32B27/30
Domestic Patent References:
| JP63296822A | ||||
| JP2009526640A | ||||
| JP2002126479A |
Foreign References:
| WO2008018400A1 | ||||
| US20040000231 | ||||
| US6361582 |
Attorney, Agent or Firm:
Hajime Amano
Yoshinori Ikeda
Hiroshi Ogawa
Koji Ishida
Kazuki Kagami
Kenichi Fujinaka
Yoshinori Ikeda
Hiroshi Ogawa
Koji Ishida
Kazuki Kagami
Kenichi Fujinaka