Title:
Fine pore size porous polyamide hollow fiber membrane and its manufacturing method
Document Type and Number:
Japanese Patent JP6337067
Kind Code:
B2
Abstract:
[Problem] The purpose of the present invention is to provide a polyamide hollow fiber membrane having such properties that the transmission of fine particles through the membrane can be prevented effectively, the membrane has an excellent water transmissibility, the entire surface of the membrane has excellent hydrophilicity, and impurities such as metal elements are rarely eluted through the membrane. [Solution] A polyamide hollow fiber membrane produced by a TIPS method under specific production conditions has the following characteristic properties: (1) the contact angle of water on the surface of the membrane is 80° or less; (2) the external pressure water transmissibility of the membrane is 50 L/(m 2 ¢atm¢h) or more; and (3) the 50 nm-particles blocking ratio of the membrane is 90% or more.
Inventors:
Yuki Hara
Takahiro Ono
Terumi Murata
Kuniko Inoue
Takahiro Ono
Terumi Murata
Kuniko Inoue
Application Number:
JP2016224920A
Publication Date:
June 06, 2018
Filing Date:
November 18, 2016
Export Citation:
Assignee:
UNITIKA LTD.
International Classes:
B01D71/56; B01D63/02; B01D69/00; B01D69/02; B01D69/08; C08J9/26; D01F6/60
Domestic Patent References:
| JP2010104983A | ||||
| JP2012020231A | ||||
| JP2010240535A | ||||
| JP2005193193A | ||||
| JP2012183501A |
Attorney, Agent or Firm:
Junya Tanaka
Yamada Iichiro
Tachibana Kenji
Hiroki Matsui
Mizuya Kamiya
Yamada Iichiro
Tachibana Kenji
Hiroki Matsui
Mizuya Kamiya