Membrane construction
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United States of America Patent
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-
May 3, 1983
Grant Date -
N/A
app pub date -
Mar 9, 1981
filing date -
Mar 9, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ion transfer membrane assembly, for electrochemical processes, is provided which includes a plurality of layers of capillary material and a structure for compressing the layers together to control the water permeability of the membrane. The membrane includes a plurality of layers of capillary material, each of the plurality of layers being formed from a corrosion-resistant relatively soft, film, such as a thermoplastic film, having surface manifestations formed on it, which manifestations define the capillaries. The surface manifestation may be formed by embossing, frosting, etching, etc. A plurality of layers of corrosion-resistant, springy, porous capillary material, such as a polyester non-woven web, may be interspersed with the capillary material film layers, and a plurality of layers of smooth-surfaced film may also be interspersed with the capillary material film layers.
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