Kapton® (Unfilled Polyimide)

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Kapton Polyimide Characteristics

Kapton® polymide (PI) withstands both high and low temperature extremes. It has a use range of -452 to 752 degrees Fahrenheit, maintaining excellent physical, electrical and mechanical properties across this broad range.

Kapton® is an effective insulator and has excellent radiation resistance which makes it a good choice for parts and components in demanding applications across many industries, including aerospace.

Kapton® is an unfilled polyimide thermoplastic material.

  • here to help 200Tolerates both extreme heat and extreme cold
  • Excellent physical and mechanical properties
  • Radiation and chemical resistance
  • UL 94V-O Flame class rating
  • An effective insulator
  • Well-suited to diverse applications

See the chart below for material properties of Kapton polyimide board.

Applications for Kapton® Polyimide Board

  • Motor slot liners
  • Insulation for transformers, capacitors, formed coil and magnet wire
  • Wire and cable tapes
  • Semiconductor components
  • Flexible printed circuits

Contact a Dielectric Manufacturing knowledge expert to discuss the use of Kapton polyimide for fabrication of your plastic parts. Call 800-367-9122 or email sales@dielectricmfg.com.

Polyimide (PI) Material Properties

Property Metricunits Englishunits
General
Density1.33e3 - 1.43e3kg/m^30.048 - 0.0517lb/ft^3
Mechanical
Yield Strength8.62e7 - 8.96e7Pa12.5 - 13ksi
Tensile Strength7.24e7 - 1.18e8Pa10.5 - 17.1ksi
Elongation0.075 - 0.9% strain7.5 - 90% strain
Hardness (Vickers)2.54e8 - 2.64e8Pa25.9 - 26.9HV
Impact Strength (un-notched)7.9e3 - 9e3J/m^23.76 - 4.28ft.lbf/in^2
Fracture Toughness2.16e6 - 6.4e6Pa/m^0.51.97 - 5.82ksi/in^0.5
Young's Modulus2.07e9 - 2.76e9Pa0.3 - 0.410^6 psi
Thermal
Max Service Temperature221 - 241°C430 - 466°F
Melting Temperature375 - 401°C707 - 754°F
Insulator or ConductorInsulatorInsulator
Specific Heat Capability1.39e3 - 1.45e3J/kg °C0.333 - 0.346BTU/lb. °F
Thermal Expansion Coefficient8.1e-5 - 1.01e-4strain/°C45 - 56µstrain/°F
Eco
CO2 Footprint9.08 - 10kg/kg9.08 - 10lb/lb
RecyclableYesYes
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