Industrial control field includes production equipment, electrical control module, automatic production line control panel, intelligent control module, frequency converter and so on. The man-machine interface products such as membrane switch used in this field need to have good hand feeling and high reliability.

　　It is recommended to use membrane switch or silicone key switch as the function operation control key panel on the equipment. Imported PET material with good chemical properties is used as human-machine interface panel, PCB, FPC or pet printed circuit.

　　In addition, considering the use of night or dark environment, the film switch or silicone key switch can be designed as backlight. Using LGF + LED backlight technology can not only obtain uniform luminous effect, but also ensure the service life of thin film switch products.

　　It is also a common solution in the field of industrial control keys and silicone switches. Because of its special characteristics, such as soft handle, dirt resistance, oil resistance, long life, it can also transmit light through radium carving. However, silicone keys can't be used for colorful customized printing like pet, but they can still be sprayed and printed. Some common solid colors can meet most of the requirements for character patterns. Pet, PCB or FPC can be pressed under the silicone button. The silicone can also be designed in the form of edge wrapping to wrap the lower part of the circuit to improve the waterproof performance of the whole silicone key switch module. In addition, we can further improve the friction resistance of the P + R button.