Choose proper adhesive for your membrane switch is one of the more critical decisions you can make during the design process. Achieving a solid bond between your membrane switch and the surface to which it is adhered is vitally important to reducing failures and ensuring the long term reliability of your product. Your choice of adhesive essentially comes down to identifying the appropriate family of adhesives and the proper adhesive thickness. There are two families of adhesive used for these applications: “ acrylic ” adhesives and “ modified acrylic ” adhesives. Acrylic Adhesives Acrylic adhesives are a popular choice, and generally considered the industry standard, for membrane switch attachment applications. They provide outstanding adhesion to metal and high surface energy plastics. These adhesives provide some initial re-positionability for placement accuracy when bonding to plastics. They also perform well after exposure to humidity and hot/cold cycles. Typica...