The main function of the membrane switch panel is to bear the decoration and protection of the appearance of the product. Therefore, the film material used to make the panel should have at least the following conditions:
1 Good appearance: The film surface of the membrane switch panel is flat and has the same gloss, and there are no surface defects such as mechanical damage, scratches, inclusions and stains.
2 Better weather resistance: The membrane switch panel layer is the surface layer of the membrane switch exposed to the natural environment, and the panel material should be able to be deformed, cracked, aged and discolored under certain natural environmental conditions.
3 Better chemical resistance: The membrane switch panel layer will likely touch different chemicals, but for most common chemicals, such as alcohols, ethers, mineral oils should have some tolerance.
4 Good dimensional stability: It is required to make a film of the membrane switch panel, and the size does not change significantly within a certain temperature range (generally -40 ° C ~ 55 ° C).
5 Elasticity requirements: The thin layer of the membrane switch panel is required to have a certain weakening performance. At the same time, the elastic deformation is small, and the elongation of the material can be judged. Generally, the elongation is large, the elastic deformation is large, and the elastic energy is poor.