PET Polyester Heaters

 Polyester heaters

Polyester heaters are used to heat large areas very economically. These heaters can be custom designed and manufactured to fit your application.

Low temp -- the maximum surface temperature for the polyester heater is 105°C (221° F). 

Industry applications include medical equipment, restaurant equipment, warming batteries or deicing.

Etched Foil Polyester Heaters

The etched foil element has superior heat transfer and exceptionally uniform heat output, which results in a faster warm-up cycle and longer life. Use this polyester heating element to cover large areas with even heat, for flat or gently curved surfaces.

Due to the resistance limits of the foil materials, as circuits become larger the economics of foil versus resistance wire become less attractive.

Our designers use a custom computer-aided design program to calculate the design, given the voltage, wattage and resistance.


Advantages of etched foil versus wire-wound heating elements are:

  • Low watts per square inch
  • Distributed wattage
  • Edge loss compensation
  • Precise manufacture of very small heaters
  • Complex heat distribution
  • UL rating of about 105°C (221°F)
  • Accurate reproduction of complex circuits


Wire Wound Polyester Heaters

Polyester film heating elements have a maximum surface temperature of 105°C (221° F). They are used to cover large areas with even heat, for flat or gently curved surfaces. Polyester film heaters can be designed and fabricated in many configurations to fit the size and shape required in your application.

Circuits are hand-wound on tooling patterns custom-designed for the appropriate resistance. Parallel circuits are utilized whenever possible, permitting continued operation should a single circuit be damaged. 

The precision wound resistance element is then positioned between two layers of polyester. Vulcanization permanently encapsulates the wire.