| 摘要 |
An electrolyte membrane (5, 5a) which has a difference in EW value between regions thereof but has the same durability as an electrolyte membrane made of one ion-exchange resin (i.e., electrolyte membrane having an even EW value throughout all regions). Two or more ion-exchange resin membranes (1) and (2) differing in EW value are placed on the lower die (11) of a hot press (10) so that an end part of one of the membranes overlies an end of the other. The upper die (12) is caused to approach and at least the overlap region (3) of the ion-exchange resin membranes (1) and (2) is pressed with heating. In the overlap region (3), the two ion-exchange resins are melted and united in a mixed state. Thus, the adjacent ion-exchange resin membranes are bonded and united in a stable state to give the electrolyte membrane (5). |
