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1. (WO2017155034) POROUS MEMBRANE, POROUS MEMBRANE MODULE, POROUS MEMBRANE MANUFACTURING METHOD, MANUFACTURING METHOD FOR CLARIFIED LIQUIDS, AND MANUFACTURING METHOD FOR BEER

Pub. No.:    WO/2017/155034    International Application No.:    PCT/JP2017/009463
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Fri Mar 10 00:59:59 CET 2017
IPC: B01D 69/00
B01D 39/16
B01D 61/14
B01D 63/02
B01D 65/02
B01D 69/08
B01D 71/44
B01D 71/68
C08J 9/26
C12C 11/00
C12H 1/16
D01F 6/00
D01F 6/76
Applicants: ASAHI KASEI KABUSHIKI KAISHA
旭化成株式会社
Inventors: SAKAKIBARA, Chihiro
榊原 千礼
HASHINO, Masatoshi
橋野 昌年
FUJIMURA, Hirokazu
藤村 宏和
Title: POROUS MEMBRANE, POROUS MEMBRANE MODULE, POROUS MEMBRANE MANUFACTURING METHOD, MANUFACTURING METHOD FOR CLARIFIED LIQUIDS, AND MANUFACTURING METHOD FOR BEER
Abstract:
[Problem] To provide a porous membrane that has improved fatigue durability while maintaining permeability. [Solution] A porous membrane comprising a hydrophobic polymer as a main component, wherein the average backbone thickness of a third layer (c) is greater than the average backbone thickness of a second layer (b), and a contiguous 10 μm layer element having an average backbone thickness less than the average backbone thickness of a first layer element, where the first layer element is a 10 μm thick layer contiguous with a surface (A) in a first layer (a), is present in the first layer (a) except for the first layer element, in the second layer (b), and in the third layer (c), where the surface (A) and a surface (C) are the two surfaces of the porous membrane, and the porous membrane is divided into 3 equal parts in the thickness direction in which the first layer (a) is the layer containing the surface (A), the second layer (b) is the layer in the center portion in the thickness direction, and the third layer (c) is the layer containing the surface (C).