Polyimide / Kapton

Polyimide is an ultra-high-performance polymer film with an exceptional operating temperature range from cryogenic to over 400 °C. We stock polyimide film (Kapton-type) in standard thicknesses, providing our customers with a proven solution for extreme-temperature electrical insulation, flex circuit substrates, and thermal barrier applications.

At a Glance

Temperature Range

-269 °C to +400 °C

Thickness Range

0.05 mm to 0.127 mm

Brands We Stock

Kapton
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Technical Properties

Typical values across stocked grades. Specific grade data sheets available on request.

Continuous Service Temperature−269 °C to +400 °C
Tensile Strength (ASTM D882)170–230 MPa
Elongation at Break (ASTM D882)70–80%
Density (ASTM D792)1.42 g/cm³
Dielectric Strength (ASTM D149)154–303 kV/mm (7,700 V/mil at 25 µm)
Dielectric Constant (ASTM D150, 1 kHz)3.4–3.5
Coefficient of Friction (Dynamic)0.36–0.48 (film on steel)
Coefficient of Thermal Expansion20 × 10⁻⁶ /°C (ASTM D696)
Water Absorption – 24 hr (ASTM D570)1.3–2.9%
Flammability (UL 94)V-0 – inherently flame retardant
Chemical ResistanceExcellent to solvents, oils, and dilute acids; attacked by strong bases
Thickness Range Stocked0.05 mm to 0.127 mm

Common Applications

  • Electrical insulation in motors and transformers
  • Flexible printed circuit substrates
  • Thermal barriers and heat shields
  • Wire and cable wrapping insulation
  • Aerospace and satellite components
  • Cryogenic insulation systems
  • Solder masking and reflow protection
  • 3D printer build surface tape

Available Grades

Brands we stock: Kapton

Polyimide Film (Standard)

General-purpose polyimide film with excellent dielectric strength, chemical resistance, and dimensional stability across an extreme temperature range. Our standard grade for electrical insulation and thermal barrier applications.

Polyimide Film (Adhesive-Backed)

Polyimide film with pressure-sensitive silicone adhesive on one side for easy application. Used for solder masking, wire wrapping, and temporary high-temperature masking during surface treatment processes.

Need Polyimide / Kapton?

We supply polyimide / kapton in sheet, roll, and custom die-cut forms. Contact our team for pricing, data sheets, or technical assistance.

Disclaimer

This resource is provided for general engineering reference only and does not constitute professional advice, specification, or guarantee of performance. Actual results depend on specific application conditions. Universal Gaskets Pty Ltd accepts no responsibility or liability for decisions made based on this information. For full terms, see our Terms & Conditions.