公开(公告)号：US20230347297A1

公开(公告)日：2023-11-02

申请号：US18028866

申请日：2021-09-24

Applicant: UNITIKA LTD. ,  NATIONAL UNIVERSITY CORPORATION KOBE UNIVERSITY

Inventor： Ryota NAKAMURA ,  Kuniko INOUE ,  Kyohei UMAKOSHI ,  Takahiro ONO ,  Hideto MATSUYAMA

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

CPC classification number: B01D69/02 ,  B01D71/56 ,  B01D69/08 ,  B01D67/0016 ,  B01D67/0027 ,  B01D2325/0231 ,  B01D2325/34

Abstract: An object of the present invention is to provide a polyamide porous membrane having improved fluid permeation performance. A polyamide porous membrane having a dense layer formed on at least one surface, wherein the polyamide porous membrane has a streak-like recessed portion extending in one direction of a surface of the dense layer, and the streak-like recessed portion has an orientation angle of 0 to 5.0° or 175.0 to 180.0° and an orientation intensity of 1.5 to 2.0 according to predetermined orientation analysis.

公开(公告)号：US20220387935A1

公开(公告)日：2022-12-08

申请号：US17773203

申请日：2020-10-02

Applicant: UNITIKA LTD.

Inventor： Kuniko INOUE

IPC: B01D63/04 ,  B01D71/56

Abstract: The filter module case includes a casing, a cap, a first layer, and a second layer. The casing has a cylindrical shape. The cap has a cylindrical shape and defines a passage providing communication between the inside and the outside of the casing and receives an end portion of the casing and is bonded to the casing. The first layer is closer to an end and faces an outer peripheral surface of the casing and the inner wall surface of the cap. The second layer is closer to the center and faces the outer peripheral surface of the casing and the inner wall surface of the cap. The casing and the cap have organic solvent resistance. The first layer is formed of a first adhesive with organic solvent resistance. The second layer is formed of a second adhesive that has an affinity for hard-to-adhere materials and has a higher elasticity.

公开(公告)号：US20220168690A1

公开(公告)日：2022-06-02

申请号：US17614693

申请日：2020-06-01

Applicant: UNITIKA LTD.

Inventor： Jun TANAKA ,  Kuniko INOUE ,  Takahiro ONO

IPC: B01D53/26 ,  B01D69/08 ,  B01D71/48 ,  B01D69/02 ,  B01D71/64 ,  B01D53/22 ,  B01D63/02 ,  D01F6/62 ,  D01F1/02 ,  C08L39/06

Abstract: Provided is a hollow fiber membrane that is excellent in water vapor separation performance immediately after production and water vapor separation performance after repeated use with compressed air. A hollow fiber membrane comprising a polyarylate resin, wherein the hollow fiber membrane includes a skin layer on at least one of inner and outer surfaces, has a tensile strength of 7 MPa or more and an elongation at break of 15% or more, and has an internal pressure water permeability of less than 100 L/(m2·atm/h) as measured using pure water at 25° C.

公开(公告)号：US20230330599A1

公开(公告)日：2023-10-19

申请号：US18028789

申请日：2021-09-24

Applicant: UNITIKA LTD. ,  NATIONAL UNIVERSITY CORPORATION KOBE UNIVERSITY

Inventor： Ryota NAKAMURA ,  Kuniko INOUE ,  Kyohei UMAKOSHI ,  Takahiro ONO ,  Hideto MATSUYAMA

IPC: B01D61/02 ,  B01D71/56 ,  B01D69/02 ,  B01D69/08 ,  B01D67/00 ,  C07C29/76

CPC classification number: B01D61/027 ,  B01D71/56 ,  B01D69/02 ,  B01D69/081 ,  B01D67/00165 ,  B01D67/0095 ,  B01D67/0086 ,  C07C29/76 ,  B01D2325/34 ,  B01D2325/20 ,  B01D2323/081 ,  B01D2323/60

Abstract: An object of the present invention is to provide a nanofiltration membrane having a molecular weight cut-off of 200 to 1,000 and a high amount pf permeate for methanol, and suitable for use as an organic solvent nanofiltration membrane. A nanofiltration membrane formed using a polyamide resin, the nanofiltration membrane having a molecular weight cut-off of 200 to 1,000 and a methanol permeability of 0.03 L/(m2·bar·h) or more.