THE BERGQUIST MEMBRANE SWITCH DIVISION AND THE HEATSEAL® TECHNOLOGY ARE NOW PART OF GGI SOLUTIONS. READ THE ACQUISITION ANNOUNCEMENT HERE.
GGI’s exclusive HeatSeal® fabrication process thermally bonds switch layers together with heat and pressure. The lamination strength is superior to pressure-sensitive adhesive construction and there is no need to externally vent the spacer layer. The result is a totally sealed switch that helps eliminate inadequate sealing of switch layers, a major cause of failure.
We rigorously test our switches before, during and after production. Click on the information tabs below for more information regarding test data.
Pressure Sensitive Adhesive Switches
Typical air distribution within a pressure sensitive adhesive (PSA) membrane switch remains constant (see Figure 1).
When the switch is used at altitudes higher than the point of manufacture (i.e. airliners), the air pressure difference within the switch increases and becomes great enough to escape through the micro-fissures in PSA until the air pressure difference between the switch and the environment is equalized (see Figure 2). Once the air has escaped from the switch and the switch is returned to a normal elevation, the memory within the polyester does not have enough force to draw air back into the micro-fissure cavities. The end result is collapsed, electrically shorted switches (see Figure 3).
Typical distribution of air within a HeatSeal® membrane switch is also constant after manufacture (see Figure 4).
When the switch is used at altitudes higher than the point of manufacture, the air pressure difference increases. With GGI’s unique HeatSeal® process, however, the bond strength between the polyester layers is so strong, no air escapes (see Figure 5). Once the HeatSeal® switch is returned to a normal elevation, the air pressure difference is reduced and it returns to its original state of equilibrium (see Figure 6).