| 摘要 |
In the present invention, there is disclosed a single-side or two-side laminated heterogeneous ion-exchange membrane comprising a mixture of ion-exchange resin in an amount of 30 to 70 percent by weight and a hydrophobic thermoplastic polymer binder. The membrane is in the form of a continuous band of sheet laminated by a reinforcing textile netting based on polypropylene, polyester or polyamide. The manufacturing process thereof is characterized by extruding the sheet from a melted granulate and then introducing it along with the reinforcing textile netting and protective separation layers, in other words foils arranged on both sides of the sandwich of the ion-exchange membrane sheet and the reinforcing textile netting, between at least two heated laminating rollers adjustable relative to each another and rotating forcibly at the same circumferential speed whereby the rollers press the laminating textile netting into the ion-exchange sheet. Subsequently, the final heterogeneous ion-exchange membrane is cooled down at a predetermined temperature gradient. Apparatus for making the above-described process is provided with an extruder (1) with an extrusion head (3) arranged at the inlet of a laminating roller (7) wherein at least one unwinding device (5) of the lamination textile and two unwinders (6) of a protective separation foil are arranged in front of said laminating roller (7). |
