Most mask material of the membrane switch is of polyester material, mainly including polyvinyl chloride (PVC), polycarbonate (PC), and polyester (PET). These three kinds of material all have their own advantages and disadvantages, and you can choose from them according to your own needs. For instance: Its flex life, resistance to chemical corrosion, abrasion resistance, insulating property, window transparency, articulation, temperature class, and UV resistance can be used as reference data for selection. As to how to make a distinction between the plastic film and plastic sheet, there is a lack of uniform standard by now. It can be classified into film, sheet and plate according to the difference of thickness. As defined by the German standard DIN55405, the material with the thickness of less than 1.5mm is called membrane, while the material with the thickness of more than 1.5mm is called sheet. In our country, as a usual practice, the material with the thickness of 0.3mm or less than 0.3mm is called membrane, the material with the thickness of 0.3-0.7mm is called sheet, and the material with the thickness of more than 0.8mm is called plate. Since the general used thickness is limited in the nameplate production process, thin film and membrane are collectively called membrane.
Membrane switch is an operating system integrating the key function, indicating element, and instrument panel as a whole. It is composed of four parts: panel, upper circuit, isolation layer, and lower circuit. It is a kind of normally open switch and its up and down contacts are in a off state under normal circumstances. When the membrane switch is pressed, the upper circuit contact deforms downward, and realize the contact with the lower circuit plate and breakover. When you release your finger, the upper circuit contact will bounce back, the circuit is off, and the loop will trigger a signal. Membrane switch is rigorous in structure with nice appearance and good seal. It has the characteristics of anti-humidity and long service life.
It is a kind of normally open switch and its up and down contacts are in a off state under normal circumstances. When the membrane switch is pressed, the upper circuit contact deforms downward, and realize the contact with the lower circuit plate and breakover. When you release your finger, the upper circuit contact will bounce back, the circuit is off, and the loop will trigger a signal. Membrane switch is rigorous in structure with nice appearance and good seal.
Most mask material of the membrane switch is of polyester material, mainly including polyvinyl chloride (PVC), polycarbonate (PC), and polyester (PET). These three kinds of material all have their own advantages and disadvantages, and you can choose from them according to your own needs.
