| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ion-exchange membrane that uses a porous substrate sheet and shows improved concentration properties. <P>SOLUTION: The ion-exchange membrane is formed by filling fine pores of a porous unstretched polyethylene sheet penetrated by the fine pores with an ion-exchange resin. <P>COPYRIGHT: (C)2013,JPO&INPIT |
