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First look at the case materials. The main Membrane Switch brands on the market generally use PC material. PC material is also known as bulletproof rubber. Shock resistance, high temperature resistance, no color characteristics are very important for the control of Membrane Circuit electrical switches. The better front panel and rear base are PC. Typically, Membrane Keyboard uses black nylon material instead of PC material on the base, which can reduce costs significantly.
As for the use of PC materials, many Switch manufacturers use domestic products (although GE is actually used by domestic cooperative factories in the United States, no company in China has the ability to produce PC materials at present. The so-called localization usually uses recycled materials for rework, so the impurities are relatively high, it will be very brittle, and the heat resistance is obviously poor. Poor quality switches are used to reduce costs. The front panel should not be filled with PC material, but with a mixture or ABS instead. These materials are not only resistant to impact and heat, but also prone to discoloration and rough surface contact. Secondly, the contact is the contact point of the conductive part of the silicon rubber Membrane Keypad process. The size of the contacts depends on the size (bigger is better) and secondly on the material used.
Previous: Membrane Keypad Application
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Address: Keda Film Technology Company, Dongguan, Guangdong
Website: https://www.kedamembrane.com/
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