ETCHED FOIL FLEXIBLE HEATING ELEMENTS
As an addition to our wire wound heaters we also manufacture etched foil heaters to meet the demands of the OEM market. This enables us to offer flexible heaters in polyamide and Polyester insulation. Available in higher power densities with an exceptionally uniform heat output. Custom designs to suit any requirement.
All Holroyd heater mats are manufactured to conform to the EEC Low Voltage and EMC Directives and are CE marked accordingly.
The etched foil element type is
created by acid etching a circuit in resistance alloy foil. This process
ensures excellent circuit pattern repeatability and allows the design of
complex heat distribution patterns within the heater area.
Etched foil elements are able to operate at very high watt densities, this is due to the large surface area covered by the foil track. The flat foil track also gives excellent uniformity and faster heat transfer resulting in longer heater life in high power applications.
Etched foil heaters are available in three types of insulation;
Silicone Rubber:
Has superb
electrical insulating properties and a high temperature tolerance. The
maximum continuous operating temperature is 200°C with short-term
excursions to 230° C.
Kapton:
Polyamide is a thin
lightweight organic polymer film that provides excellent tensile strength,
tear resistance and dimensional stability. Ideal for applications
requiring low outgassing or resistance to radiation, chemicals and
solvents. Operating temperature range -195° C to +200° C
Polyester:
Low
cost alternative to silicone rubber and kapton. Polyester is suitable for
low temperature applications up to 120° C.