| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vapor permeable membrane which has leak-resistant properties and anti-wearing properties and controls the change of vapor permeability with time and which satisfies high vapor permeability simultaneously. <P>SOLUTION: The vapor permeable membrane is a complexified vapor permeable membrane which has an ion-exchange layer on the surface of a surface-treated porous substrate and is characterized in that the counter ion of the ion-exchange group in the ion-exchange resin is an ammonium ion and/or metal ion. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
