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Material Information

Celazole® is Dupont’s brand name for the high performance imidized thermoplastic called PBI. It is an extremely clean material in terms of ionic impurity and does not outgas with the exception of water. This makes Celazole® PBI ideal for semiconductor manufacturers and vacuum chamber applications. Celazole PBI is the highest performing unfilled plastic available.  It has the highest heat resistance rating of engineered plastics and a mechanical properties retention over 400º F. It also boasts the best wear resistance and load carrying capacity of any engineered plastic. Overall, it is an excellent thermal insulator, has excellent ultrasonic transparency, has good chemical resistance, and other plastics in melt do not stick to it. Cerlazole® PBI is available in the forms of sheet and rod.


  • High heat insulator bushings
  • Electrical connectors
  • Ball valve seats
  • Wafer retaining rings for gas plasma etching
  • Vacuum tips
  • Wafer carriers
  • Contact seals
  • Thermal isolators
  • Guide rollers
  • Aerospace applications
  • Automotive applications
  • Chemical process


  • The best heat resistance and mechanical retention over 400º F of any unfilled plastic
  • High compressive and dimensional stability
  • Best wear resistance and load carrying capacity of all engineering plastics
  • Excellent electrical insulator
  • No outgas (except water)
  • High water absorption
  • Soluble in aprotic solvents
  • Very clean in terms of ionic impurity
  • Excellent ultrasonic transparency


PhysicalAstm Test MethodCelazole® (PBI)
Density (lb/in^3)D7920.047
Specific GravityD7921.3
Water Absorption @ 24 hours (%)D5700.4
Tensile Strength (PSI)D63823,000
Tensile Modulus (PSI)D638850,000
Tensile Elongation at Break (%)D6383
Flexural Strength (PSI)D79032,000
Flexural Modulus (PSI)D790950,000
Izod Impact (Notched), ft-lb/inD2560.5
Coefficient of Thermal
Expansion, 10^-5/°F
Heat Deflection Temperature 264 psi, ºFD648800
Glass Transition Temperature, °FD3418750
Continous Service Temp (Operating), °F650
Flammability RatingUL94V-0
Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
Volume Resistivity (ohm-cm) @ 50% RHD257>10^13
Dielectric Constant at 1 MHzD1504.2
Dissipation Factor at 1 MHzD150

Disclosure: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.


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