What material is used to repair ion exchange membranes? ? ? A piece of black transparent film, attached to the membrane

1. The material used to repair the membrane is called a patch; it should be made of the same material as the membrane itself. The manufacturer will provide one when purchasing the membrane, but if it’s not enough, you need to buy one separately. 2. The machine used for applying membranes is simply called a membrane applicator. 3. The black parts are the patches; of course, there are also white patches, and the patches for Shin-Etsu’s membranes are white. The yellow one is made of a high-temperature material; I’m not sure exactly what kind of material it is. Its function is to protect the membrane from high temperatures, while also allowing for the repair of the membrane, as the temperature reached during repair is 250 degrees ； 4. Points to note when applying the membrane patch: first, ensure that the anode and cathode of the membrane are not reversed, and likewise, the anode and cathode of the patch must also not be reversed. Both temperature and time control are set.

As a supplement: The patch should be pressed to the anode side of the ion membrane.

1. The material used for membrane patches is mainly perfluorosulfonic acid resin; the type of membrane determines the type of patch material. For example, DuPont uses N-117, N-320, and N-324 for dry-type patches, while Asahi Kasei uses materials soaked in a balancing solution; Shin-Etsu also uses dry-type patches. Generally, patches are in black mesh form, but transparent ones are also available. The yellow one above is the heat-insulating film, made of polyimide. 2. For membrane repair machines, I first used ones made in the United States (desktop models), and later I used portable models produced in Milan, Italy; they worked well. The domestic ones are simply terrible.