A method for the preparation of ion exchange membranes called the “paste method” has been developed into a semicontinuous preparation. The roll-coating system being employed, a base membrane 1 m. wide and 50 m. long is prepared continuously; the ion exchange group is then introduced to it. The ion exchange membranes thus prepared have been proved to have excellent electrochemical and mechanical properties as well as an excellent appearance.
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Mizutani et al. (1965) studied this question.
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