Für Dampf permselektive Membran.

摘要

A vapor permselective membrane consisting essentially of an ion exchange membrane made of a fluorine-containing polymer having a fixed ion concentration of from 1 to 6N, a water content of from 20 to 250% by weight and an ion exchange capacity of from 0.6 to 2.5 meq/g dry resin, the ion exchange membrane having a thickness of from 0.1 to 300 mu m and a moisture content of from 1 to 10% by weight, the permselective membrane having a water vapor permeation rate of at least 50 m<3>/m<2>.atm.