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Material Information

Ultem® PEI is a high performance polymer that is transparent amber in color. Ultem® PEI in general is high in strength and rigidity at elevated temperatures with long-term heat resistance. It is inherently flame resistant and low in smoke production. It also offers excellent dimensional stability, excellent electrical insulating properties, and a broad chemical resistance. It is easily machined and finished. This makes it ideal for use in medical reusable application where repeated sterilization is required. Ultem® 2300 is a 30% glass reinforced grade of Ultem® PEI, and is the most common filled Ultem® grade. It provides even greater rigidity and dimensional stability than Ultem® 1000, while still providing the unfilled grades useful characteristics. The glass reinforcement provides an exceptional strength to weight ratio and increased tensile strength. Ultem® 2300 is available in the form of film, sheet, and rod.


  • Reusable medical equipment
  • Electrical/electronic applications
  • Semiconductor burn in sockets
  • Aircraft/aerospace interiors
  • Food service
  • High temperature lighting bezels
  • Under-hood automotive applications
  • Medical instrument trays
  • Institutional kitchenware


  • Hydrolytically stable
  • UV and gamma radiation resistant
  • Greater rigidity and dimensional stability than Ultem® 1000
  • Exceptional strength to weight ratio
  • Increased tensile strength
  • Excellent mechanical strength
  • Easily machined and finished
  • Outstanding heat resistance
  • Exceptional resistance to environmental forces
  • Inherent flame resistance with low smoke
  • High dielectric strength
  • Low dissipation factor over wide range of frequencies


PhysicalAstm Test MethodDuratron® U2300 PEI
(Ultem® 2300)
30% Glass Filled
Density (lb/in^3)D7920.055
Specific GravityD7921.51
Water Absorption @ 24 hours (%)D5700.18
Water Saturation (%)D5700.9
Tensile Strength (PSI)D63817,000
Tensile Modulus (PSI)D638800,000
Tensile Elongation at Break (%)D6383
Flexural Strength (PSI)D79027,000
Flexural Modulus (PSI)D790850,000
Compressive Strength (PSI)D69532,000
Compressive Modulus (PSI)D695625,000
Izod Impact (Notched), ft-lb/inD2561
Rockwell HardnessD785M114, R127
Coefficient of Thermal Expansion,
Heat Deflection Temperature 264 psi, ºFD648410
Glass Transition Temp, ºFD3418410
Continous Service Temp (Operating), °F340
Thermal Conductivity, BTU-in/hr-ft² °FC1771.56
Flammability RatingUL94VO
Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
Surface Resistivity (ohms/square)EOS/ESD S11.11> 10^13
Dielectric Constant at 1 KHzD1503.7
Dissipation Factor at 1 KHzD1500.0015

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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