Invention Grant
- Patent Title: Cellulose acetate-based hollow fiber membrane
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Application No.: US16344984Application Date: 2017-10-31
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Publication No.: US11007490B2Publication Date: 2021-05-18
- Inventor: Kimihiro Mabuchi , Haruhiko Kohyama , Yoshinori Takii
- Applicant: TOYOBO CO., LTD.
- Applicant Address: JP Osaka
- Assignee: TOYOBO CO., LTD.
- Current Assignee: TOYOBO CO., LTD.
- Current Assignee Address: JP Osaka
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JPJP2016-212835 20161031
- International Application: PCT/JP2017/039248 WO 20171031
- International Announcement: WO2018/079808 WO 20180503
- Main IPC: B01D63/02
- IPC: B01D63/02 ; B01D69/00 ; B01D69/02 ; B01D69/08 ; B01D71/16 ; A61M1/34 ; B01D61/24 ; D01F2/28

Abstract:
The present invention provides a hollow fiber membrane including a cellulose acetate-based polymer, in which when an inner surface of the hollow fiber membrane is observed under an atomic force microscope, a plurality of groove-like recesses oriented in a lengthwise direction of the hollow fiber membrane are observed, an average length of the recesses is greater than or equal to 200 nm and less than or equal to 500 nm, an average width of the recesses is greater than or equal to 15 nm and less than or equal to 50 nm, and an aspect ratio defined as a ratio of the average length to the average width of each of the recesses is greater than or equal to 6 and less than or equal to 22.
Public/Granted literature
- US20190270051A1 CELLULOSE ACETATE-BASED HOLLOW FIBER MEMBRANE Public/Granted day:2019-09-05
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