When the United States Golden Valley Products (GVP) needed a material that provided an effective barrier effect for its dedicated Membrane Switch, which was able to withstand the effects of moisture, chemicals, and high temperatures, VICTREX (PEEK) was selected from Victrex in the United Kingdom. (Film. Compared with polyester and polyimide film, VICTREX PEEK film has better moisture resistance; compared with polyester film, its operating temperature is higher and its chemical resistance is better. GVP also adopts it. VICTREX PEEK film for its dedicated printed circuit sensors and film potentiometers.
Since very sensitive conductive silver ink is to be printed on the film, it is necessary to ensure that external factors such as moisture and the like do not enter the silver material and corrode it. Switching failures are absolutely unacceptable for a device such as a pancreatic lead or a medical syringe pump, so maintaining a good barrier effect is extremely important. The membrane switch is a layered structure and the complex membrane switch design can have many layers.
In a standard membrane switch panel, pressure sensitive adhesive is used to bond the layers together.
Information Source: Plastic
