IP Library › Granted Patent US 9,162,185
Granted Patent B2
US 9,162,185 · App. 14/007,290 · Granted Oct 20, 2015

Ion-exchange membrane

Inventors: Nobuhiko Ohmura (Shunan, JP); Kazuo Mizuguchi (Shunan, JP); Kazunori Nishio (Shunan, JP); Toshio Aritomi (Shunan, JP)
Assignee: ASTOM Corporation
B01D61/485B01D69/10B01D71/28B01J39/20B01J41/14B01J47/007B01J47/12C08J5/22C08J5/2231B01D2325/42C08J2323/06
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Quick Facts
Patent No.
US 9,162,185
App. No.
14/007,290
Granted
Oct 20, 2015
Kind
B2
Abstract

An ion-exchange membrane including a porous unstretched polyethylene sheet in which fine pores are piercing, the pores being filled with an ion-exchange resin. The ion-exchange membrane exhibits excellent concentration property.

Claims (3)

1. An ion-exchange membrane including a porous unstretched polyethylene sheet that has a thickness of 50 to 250 μm and a porosity of 30 to 80% and in which fine pores are piercing, said pores being filled with an ion-exchange resin.

2. The ion-exchange membrane according to claim 1 , wherein said porous unstretched polyethylene sheet has tensile elongations of not less than 450% in both the lengthwise direction (MD) and the axial direction (TD).

3. The ion-exchange membrane according to claim 1 , wherein said ion-exchange resin is obtained by filling said pores with a polymerizable composition for forming the ion-exchange resin followed by the polymerization of said polymerizable composition.

Assignments (2)
CHANGE OF ADDRESS Recorded Nov 16, 2016
From: ASTOM CORPORATION
To: ASTOM CORPORATION
Reel/Frame 040631/0296 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 25, 2013
From: OHMURA, NOBUHIKO; MIZUGUCHI, KAZUO; NISHIO, KAZUNORI; ARITOMI, TOSHIO
To: ASTOM CORPORATION
Reel/Frame 031279/0983 →
Priority Claims (1)
JP 2011-072868 · Mar 29, 2011 · national
Continuity (1)
Related Publication 20140014519A1 · Jan 16, 2014