Toray Industries, Inc.

Kenji Komori

Kenta Iwai

Toshiyuki Ishizaki

Masayuki Hanakawa

Tamotsu Kitade

Shuji Furuno

Shinichi Minegishi

Yoshifumi Odaka

Seiko Kantani

Hideaki Ando

Atsushi Kitanaka

Yasuharu Watanabe

Xunyao Fu

Nao Minaki

A separation membrane element including a pair of separation membranes containing two separation membranes arranged so that the filtrate-side surfaces thereof are disposed in mutually opposed relation, and a plurality of resin members bonded to both of the mutually opposed filtrate-side surfaces, a peripheral edge of the pair of separation membranes being sealed.

Separation membrane element and separation membrane module

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 &#x3bc;m 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 &#x3bc;m to 20 &#x3bc;m from a second surface satisfy the relational expression of D&#x3e;Dand the average diameter Dand the average diameter Dof a spherical structure in a third region satisfy the relational expression of 1.10&#x3c;D/D&#x3c;4.00.

Separation membrane and method for producing same

A separation membrane including a separation-functional layer is provided, wherein the separation-functional layer contains a polyvinylidene fluoride-type resin having a melt viscosity of 3,300 Pa&#xb7;s or more, and also the separation-functional layer has a three-dimensional network structure. A separation membrane is provided having high virus removal performance, high pure water permeability, and high physical durability and high chemical strength, which can also be used in the field of water treatment.

Separation membrane and method for producing the same

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Shiga, Japan

Kenji Komori