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


Astm Test Method

Duratron® U2300 PEI
(Ultem® 2300)
30% Glass Filled

Density (lb/in^3) D792 0.055
Specific Gravity D792 1.51
Water Absorption @ 24 hours (%) D570 0.18
Water Saturation (%) D570 0.9


Tensile Strength (PSI) D638 17,000
Tensile Modulus (PSI) D638 800,000
Tensile Elongation at Break (%) D638 3
Flexural Strength (PSI) D790 27,000
Flexural Modulus (PSI) D790 850,000
Compressive Strength (PSI) D695 32,000
Compressive Modulus (PSI) D695 625,000
Izod Impact (Notched), ft-lb/in D256 1
Rockwell Hardness D785 M114, R127


Coefficient of Thermal Expansion,
D696 1.1
Heat Deflection Temperature 264 psi, ºF D648 410
Glass Transition Temp, ºF D3418 410
Continous Service Temp (Operating), °F  – 340
Thermal Conductivity, BTU-in/hr-ft² °F C177 1.56
Flammability Rating UL94 VO


Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
D149 770
Surface Resistivity (ohms/square) EOS/ESD S11.11 > 10^13
Dielectric Constant at 1 KHz D150 3.7
Dissipation Factor at 1 KHz D150 0.0015


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.