Material Information

Radel® R PAES is an amorphous high performance thermoplastic that offers better impact and chemical resistance than polysulfone (Udel®) and polyetherimide (Ultem®). Radel® R PAES offers superior hydrolysis resistance and virtually unlimited steam sterilizability. This makes it an excellent option for medical devices such as sterilization trays, dental and surgical equipment, and fluid handling coupling and fitting applications. Radel® R PAES is also tough, resistant to common acids and bases, has a superior impact strength over a wide range of temperatures, has a high heat deflection temperature, and has excellent resistance to environmental stress cracking. It is available in a natural bone white color or a transparent amber color in the forms of sheet and rod.


  • Medical wands
  • Surgical devices
  • Insulin pens
  • Tubing
  • Sterilization trays
  • Blood glucometers
  • End caps for filtering equipment
  • Electronics
  • Food industry


  • Superior hydrolysis resistance
  • Unlimited steam sterilizability
  • Good impact and chemical resistance
  • Tough
  • Resistant to common acids and bases
  • Superior impact strength over wide range of temperature
  • High heat deflection temperature
  • Excellent resistance to stress cracking
  • Superior dimensional stability


Astm Test Method

Radel® R

Density (lb/in^3) D792 0.047
Specific Gravity D792 1.3
Water Absorption @ 24 hours (%) D570 0.4


Tensile Strength (PSI) D638 11,000
Tensile Modulus (PSI) D638 340,000
Tensile Elongation at Yield (%) D638 30
Flexural Strength (PSI) D790 15,500
Flexural Modulus (PSI) D790 345,000
Compressive Strength (PSI) D695 13,400
Compressive Modulus (PSI) D695 280,000
Izod Impact (Notched), ft-lb/in D256 2.5
Rockwell Hardness D785 M80, R120


Coefficient of Thermal Expansion,
D696 3.1
Heat Deflection Temperature 264 psi, ºF D648 405
Glass Transition Temp, ºF D3418 428
Continous Service Temp (Operating), °F  – 300
Thermal Conductivity, BTU-in/hr-ft² °F C177 2.4
Flammability Rating UL94 VO


Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
D149 360
Volume Resistivity (ohm-cm) @ 50% RH D257 > 10^15
Dielectric Constant at 1 MHz D150 3.44
Dissipation Factor at 1 MHz D150 0.0017


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.