HEATFLEX MICA HEATERS

APPLICATION ADVANTAGES

• Highest watt density rating among all typesof flexible heaters (110 watts per sq. inch).
• Highest operating temperature among all types of flexible heaters (1000°F).
• More efficient than other high temperature conventional heating elements due to the thin profile.

CONSTRUCTION DETAILS

Kelvin's HEATFLEX mica heaters utilize either .015" or .020" mica sheet. Two layers of this product are laminated together with an etched circuit element. High temperature mica glass insulated leads are attached to the circuit and then protected with high temperature potting.

ATTACHMENT METHODS

Mica Heaters must be clamped between a heat sink and a rigid backing plate. Most designs incorporate bolt holes through the heaters so that even pressure is maintained across the heater surface. A thin layer of ceramic paper can be used to compensate for any minor surface irregularities in the heater or backing plate. If a lead attachment appendage is not used, then a relief area should be allowed for in the backing plate to accommodate the thicker potted lead attachment area. For more details contact Kelvin.

Voltage and Wattage

All voltage options that apply to etched circuits are appropiate for HEATFLEX mica heaters. The same holds for the previously mentioned wattage options. Of particular benefit is the distributed wattage option that allows for higher watt density at the perimeter of the heater to compensate for edge loss.(Refer   to silicone rubber heaters)