Kapton Polyimide Heaters

Kapton® (polyimide) Heaters offer superior tensile strength and tear resistance, with precision heat distribution. They are ideal for extreme temperature environments, from -319°F to +500°F (-195°C to +200°C). Kapton® (polyimide) Flexible Heaters standard at 0.007” (0.2mm) thick and up to 20”x26” (.508m x .660m) areas. Watt density is 5W/in² (0.8W/cm²) standard, with units available to 50W/in² (7.8W/cm²). Kapton® is an organic polymer with very high dielectric capabilities, while providing superior resistance to most solvents, oils, even radiation.

Kapton® is a Registered Trademark of DuPont

Kapton® (polyimide) Heater Features:

  • Operate in extreme temperatures: -319°F to +450°F (-195°C to +260°C)
  • Thickness can range from 0.006” to 0.012” (.0002 to .0004mm), and up to 16“ x 29” (475 mm x 660 mm)
  • Watt density of 5 W/in² (0.8 W/cm²) standard with units available up to 50 W/in² (7.8 W/cm²)
  • Transparent Kapton®  (polyimide) film allows easy visual inspection on the internal structures
  • Etched foil heating elements
  • Kapton®, Teflon®, or Silicone leads are available

Kapton® (polyimide) Heater Specifications:

Sizes: Custom, consult Durex Industries for your application requirements
Standard Thickness: .007” in
Maximum Watt Density: 50 W/in² (depending on application, consult Durex for higher densities)
Standard Dimensional Tolerances: Less than 12” ± .062, Greater than 12” ± .125
Maximum Operating Temperature: 450°F (260°C)
Minimum Operating Temperature: -319˚F (-195˚C)
Wattage Tolerance: ±10%
Dielectric Strength: 1000 VAC

 

Kapton® (polyimide) Heater Mounting Options:

Pressure Sensitive Adhesive
PSA is the most common option for mounting Kapton® heaters. By selecting proper materials, including the release agent, you can promote a strong bond and effective heat transfer.

Clamping
Kapton® heaters can also be clamped to their heating surface. A pressure plate is then fastened in place. To ensure even distribution of heat, and to protect the heater, a pressure pad or insulation layer is advised. The work surface should be free of any debris, dirt, chemicals, bumps, or grooves. This will protect the heater as well as prevent overheating.

Self-Fusing Tape
When mounting to a smooth cylindrical surface, Kapton® heaters can be mounted with self-fusing tape. This will provide a safe operation and even transfer of heat.

 

Temperature Control Options:

For temperature control on Kapton® heaters, Durex recommends an RTD or thermocouple. Sensors are mounted to the surface of the heater and send a resistance measurement to an external controller that cycles the heater at a set temperature.