When designing a custom membrane keypad for an outdoor application it is important the customer provides details of the applications intended use during the initial design phase. This allows us to suggest the most suitable material, switch technology and overall construction from the options available to ensure full functionality in a specific environment.
UV and chemical resistant materials
Outdoor membrane keypad applications that are exposed to sunlight and harsh conditions should be made from a UV or chemical resistant material. If a keypad is used outside and is not made from a UV resistant material it will become brittle over time (years) and any windows in the keypad will turn yellow or cloudy.
At Diamond we use MacDermid Autotex XE UV absorbing chemical, this ensures the greatest longevity of an outdoor membrane keypad application against sunlight. To enhance strength, durability, and toughness of a custom membrane keypad we use Autoflex EB, which is also made by MacDermid.