公开(公告)号：US20150209735A1

公开(公告)日：2015-07-30

申请号：US14421887

申请日：2013-08-14

Applicant: UNITIKA LTD.

Inventor： Yuki Hara ,  Takahiro Ono ,  Terumi Murata ,  Kuniko Inoue

IPC: B01D71/56 ,  C02F1/44 ,  B01D67/00 ,  B01D69/08 ,  B01D69/02

CPC classification number: B01D71/56 ,  B01D61/14 ,  B01D67/0016 ,  B01D69/02 ,  B01D69/08 ,  B01D69/087 ,  B01D2323/12 ,  B01D2323/42 ,  B01D2325/20 ,  B01D2325/36 ,  C02F1/44 ,  C02F2103/04 ,  C02F2103/343 ,  C02F2103/346

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/(m2·atm·h) or more; and (3) the 50 nm-particles blocking ratio of the membrane is 90% or more.

Abstract translation: 本发明的目的在于提供一种聚酰胺中空纤维膜，其特征在于可以有效地防止细颗粒通过膜的透过，膜具有优异的透水性，膜的整个表面具有优异的 亲水性，杂质如金属元素很少通过膜洗脱。 [解决方案]通过TIPS法在特定制造条件下制造的聚酰胺中空纤维膜具有以下特征：（1）膜表面的水的接触角为80°以下; （2）膜的外压透水率为50L /（m2·atm·h）以上; 和（3）膜的50nm粒子阻隔率为90％以上。

公开(公告)号：US09950300B2

公开(公告)日：2018-04-24

申请号：US14421887

申请日：2013-08-14

Applicant: UNITIKA LTD.

Inventor： Yuki Hara ,  Takahiro Ono ,  Terumi Murata ,  Kuniko Inoue

IPC: B01D71/56 ,  B01D69/08 ,  B01D69/02 ,  B01D67/00 ,  C02F1/44 ,  B01D61/14 ,  C02F1/00 ,  C02F103/04 ,  C02F103/34

CPC classification number: B01D71/56 ,  B01D61/14 ,  B01D67/0016 ,  B01D69/02 ,  B01D69/08 ,  B01D69/087 ,  B01D2323/12 ,  B01D2323/42 ,  B01D2325/20 ,  B01D2325/36 ,  C02F1/44 ,  C02F2103/04 ,  C02F2103/343 ,  C02F2103/346

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/(m2·atm·h) or more; and (3) the 50 nm-particles blocking ratio of the membrane is 90% or more.