Sandwiched between layers of silicone rubber are uniformly spiraled (stranded) resistance wire web (that covers the entire surface) or an etched foil. The layers are then bonded together through heat and pressure. The wire wound design allows for up to 10 watts per square inch, while with the etched foil design up to 20 watts per square inch can be achieved. Silicone rubber heaters are used up to 400 deg F.
This sandwiched construction makes silicone rubber heaters an ideal solution to the requirements of many low and medium temperature applications, which do not conform to the standard shapes, sizes and dimensions of band, strip, cartridge, tubular and open coil air heaters.
When silicone rubber heaters are made with a pressure sensitive adhesive backing, a thin layer of aluminum is added prior to the adhesive layer, in order to improve heat transfer and maintain its uniformity. The watt density of the heater should not be greater than 7 WSI (watts per square inch) when PSA (pressure sensitive adhesive) is used.
Silicone rubber heaters can also be vulcanized to a silicone rubber sponge for insulation.
We also manufacture polyamide heaters (Kapton®) for many different applications.
Contact Delta T today to find out more about silicone rubber heaters and other industrial gas and electric heating devices.