Info about Commercial membrane Switch and Military Membrane Switch

①Commercial membrane switch keyboard

Issued on July 1, 1991, the standards for the high, low temperature, constant humidity and temperature of the membrane switch in the mechanical industry standard JB5045-91 "Technical Conditions of the Membrane Keyboard" of the People's Republic of China implemented in 1992 are:

High temperature: (55 +/- 2) degrees (72h)

Low temperature: (-40 +/- 3) degrees (16h)

Constant damp heat: (40 +/- 2) degrees {relative humidity is 96% + /-(2 ~ 3)%, lasts 96h}

Temperature change: -40 ~ 50 degrees (after 5 cycles of test, recover for 2h under normal atmospheric conditions

Any membrane switch that can pass this assessment condition and has the general function of a membrane switch can generally be called a commercial membrane switch, which is the most common and the most characteristic product of membrane switches.

The panel layer of commercial membrane switches keypad is usually PC or PET film as the substrate, and the circuit substrate is conductive silver paste, or conductive silver carbon paste mixed paste; the carrier of the conductive printing material is PET film. In consideration of the application environment and the reduction of manufacturing costs, cheap PVC film is usually used as the isolation layer.

②Military membrane switch Keyboard

The biggest difference between the two is that they are used in different environments. The use of military membrane switches keyboards is quite harsh. As far as the ambient temperature is concerned, its working conditions not only need to meet -54 ~ 70 degrees, but it also needs to accept a temperature shock of -55 ~ 100 degrees and 3 cycles. Moreover, in foreign military standards, the high temperature test specifies an operating temperature of 125 degrees and a high temperature storage temperature of 150 degrees. It is obvious that commercial membrane switches keypads are not suitable for working in such a harsh military environment, we Kaike Electronics is a membrane switch keyboards manufacturer adn we'd like to provide you more info according to your drawing or design. Of course, we can design the military switch keyboard or keypad for you as well.