The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 2022
Filed:
Jul. 20, 2020
Applicant:
Asahi Kasei Kabushiki Kaisha, Tokyo, JP;
Inventors:
Assignee:
ASAHI KASEI KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 71/34 (2006.01); B01D 69/02 (2006.01); B01D 69/08 (2006.01); B01D 69/12 (2006.01); C02F 1/44 (2006.01); B01D 67/00 (2006.01); B01D 69/14 (2006.01); B01D 71/02 (2006.01);
U.S. Cl.
CPC ...
B01D 71/34 (2013.01); B01D 67/0079 (2013.01); B01D 69/02 (2013.01); B01D 69/08 (2013.01); B01D 69/088 (2013.01); B01D 69/12 (2013.01); B01D 69/148 (2013.01); B01D 71/027 (2013.01); C02F 1/44 (2013.01); B01D 2325/02 (2013.01); B01D 2325/04 (2013.01); B01D 2325/24 (2013.01);
Abstract
The porous hollow fiber membrane of the present invention contains a thermoplastic resin, and includes a surface having a surface porosity of 32 to 60% and a fine pore diameter of 300 nm or less, and has a compressive strength of 0.7 MPa or more. The porous hollow fiber membrane of the present invention may include at least two layers, and in this case, the surface of one layer has a thickness of backbone of 0.3 to 20 μm and a fine pore diameter of 0.3 to 10 μm, and the surface of the other layer has a surface porosity of 32 to 60% and a fine pore diameter of 0.05 to 0.3 μm.