The material of the membrane keyboard and panel not only requires smoothness and printability, but also has the characteristics of flexibility and high elasticity. So what are the materials that can be used to make film buttons?

PVC ℃. 175 ≤ 0.5 / smooth surface is stable to acid, alkali and salt at room temperature. Good wear resistance, combustion and self extinguishing, sound suppression and shock resistance, good electrical insulation. The thermal stability is poor. Cheap common signs and panels.

Polycarbonate PC60 ≤ 120 ℃. 175 ≤ 1.0 has the advantages of high transmittance, low water absorption, good dimensional stability, good bending, tensile and compressive strength, heat resistance, cold resistance, electrical insulation, atmospheric aging resistance and so on. Poor resistance, poor fatigue resistance, easy to produce stress cracking, the output interface terminal circuit is generally printed with carbon material, without protective coating, air oxidation gradually forms a falling layer until the end of service life, which is the most vulnerable place for membrane keyboard failure, mainly depends on the environment, whether it is used or not, the time of physical damage is 3 ≤.

Generally speaking, the most widely used, in addition to meeting the requirements of most thin-film keyboard panels, high transmittance smooth PC can also meet the requirements of LCD window. Polyester (PET) - 30 ≤ 120 ℃. It is resistant to 1 × 0.2, insoluble in common organic solvents and alkali resistant. It has excellent mechanical properties, electrical properties, hardness and maximum strength and toughness, low water absorption, good wear resistance, wear resistance and high dimensional stability.

The tensile strength of aluminum film is similar to that of aluminum film, which is much higher than that of PC and PVC. Textured pet is the most ideal substrate for the fabrication of thin film keyboard circuit because the surface is difficult to be processed into sub gloss type. Among them, textured pet is suitable for products with high surface requirements or LCD window.