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:
Jul. 07, 2020
Filed:
Jul. 07, 2015
Toray Industries, Inc., Tokyo, JP;
Kenta Iwai, Shiga, JP;
Toshiyuki Ishizaki, Shiga, JP;
Tamotsu Kitade, Shiga, JP;
Kenji Komori, Shiga, JP;
Masayuki Hanakawa, Shiga, JP;
TORAY INDUSTRIES, INC., Tokyo, JP;
Abstract
An object of the present invention is to provide a separation membrane having high mechanical strength and being less likely to cause clogging and capable of continuously maintaining high water permeation performance. The present invention relates to a separation membrane characterized in that the average diameter Dof a spherical structure in a region within 10 μm from a first surface in a separation membrane having a spherical structure layer formed of a thermoplastic resin and the average diameter Dof a spherical structure in a region of 10 μm to 20 μm from a second surface satisfy the relational expression of D>Dand the average diameter Dand the average diameter Dof a spherical structure in a third region satisfy the relational expression of 1.10<D/D<4.00.