How to choose the material type of the Membrane Keypad panel?

Film materials suitable for the production of panel layers are usually divided into PC, PVC and PET. According to the surface can be divided into sand (three layers of translucent film) and smooth (transparent film).

 PC material physical and chemical properties of the comprehensive index is good, wide range of application, ink, film open/closed panel layer is widely used. The sand surface of PC material is different from the smooth surface. The reason for choosing sand surface material is that the Membrane Keypad is mainly used in electronic products. As a control system, the panel does not want to be disturbed by light. Sand surface only diffuse reflection, no bright reflection. At the same time, due to the sand on the surface, it has the effect of preventing scratches. In contrast, optical surface materials do not have the above properties. However, as a material with a light side, the printing on the back will be more dynamic. There are strong decorative needs, even if you have not touched it all the time, considering the special needs of the display area, such as LCDLCD panels or LCD panels, it is advantageous to choose lighter surface materials.

The price of PVC film material is lower, about half of PVC material. In the production of popular private products, the selection of PVC materials can reduce production costs. Polyvinyl chloride material has good plasticity and can be processed by three-dimensional cold pressing. The normal thickness of the PVC plate on the light surface is above 0.5mm, and all surfaces are protected by PET or adhesive paper, most of which are used to make decorative plates. Sand surface PVC material thickness is generally within 0.3mm, the use of standard plate material, no drum.

he general properties of PET film can be replaced by PC film, so it is not common in panel materials. In addition to the insulation, resilience, solvent resistance and other special cases, can not meet the requirements of other films.

The surface state of PET film is generally an optically transparent film. In a few cases, there are sandy products, such as KB products made by Japan's Kimoto, but the sand is thin, similar to the light of the desert surface. Desert light surfaces can be obtained on PET surfaces. Unlike PC sand, it is obtained through the sand roller in the process of mechanical rolling, which determines that its surface is not as obvious as PC sand. For example, Autotype in the UK has a textured polyester sheet. The length of most coating films is fixed, but the cost is about 3-5 times that of sand-finished PCS and requires user support.