CONTINUOUS PROCESS FOR PRODUCING POLYMER ELECTROLYTE MEMBRANE AND APPARATUS THEREFOR

The present invention provides a process for producing a polymerelectrolyte membrane comprising the steps of coating a solution of a polymerelectrolyte on at least one surface of a porous substrate and laminating the coated porous substrate and a supporting material while applying a tension F (kg/cm) in a range of the following expression (A) 0.01≤F≤10 to the coated porous substrate. According to the present invention, a polymerelectrolyte composite membrane in which wrinkling and the like are suppressed and whose appearance is excellent can be continuously produced.