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High Performance > 300°F | Polyetherimide (Ultem®)

TECAPEI unfilled Ultem

TECAPEI is a Polyetherimide based polymer, sometimes also known as PEI material, and is an amorphous thermoplastic with high mechanical strength and rigidity.

Polyetherimide or PEI polymer is extruded by Ensinger in sheet and rod shapes, using Sabic Ultem® resin.  Unfilled PEI thermoplastic is translucent and amber in color, and combines exceptional mechanical, thermal and electrical properties.

Often referred to as Ultem® plastic, polyetherimides are very similar in their physical characteristics to the polyarylsulphones, while simultaneously offering significant advantages. This material has a remarkably high creep resistance over a wide range of temperatures and furthermore, polyetherimides have a high permanent operating temperature.   Very good resistance to hydrolysis, along with dimensional stability rounds out the portfolio of typical polyetherimide properties.

  • Excellent mechanical strength
    TECAPEI™ exhibits high tensile strength at room temperature and retains a significant portion of this strength at elevated temperatures.
    Glass fibers further increase high-temperature strength.
  • Outstanding heat resistance
    TECAPEI™ retains its physical properties at elevated temperatures.
  • Exceptional resistance to environmental forces
    Environmental characteristics of TECAPEI™ include it's stress resistance.
  • Inherent flame resistance with low smoke evolution
    Tested internally to UL 94 V-0.
  • High mechanical strength
  • High dielectric strength
  • Low dissipation factor over a wide range of frequencies
  • Excellent machinability and finishing characteristics
    TECAPEI™ can be easily machined with conventional metalworking tools, painted, hot stamped, printed, or metallized.

TECAPEI has many applications in medical, electronic/electrical, microwave, automotive, and aircraft industries.

  Properties Condition Units Value
Physical Chemical Designation PEI
Density g/cm3 1.27
Mechanical Tensile Modulus @ 73 °F PSI 430,000
Tensile Strength @ Yld @ 73 °F PSI 17,500
Tensile Strength @ Brk @ 73 °F PSI 17,500
Shear Strength @ 73 °F PSI
Elongation @ Yld @ 73 °F % 7-8
Elongation @ Brk @ 73 °F % 40
Flexural Modulus @ 73 °F PSI 480,000
Flexural Strength @ 73 °F PSI 28,000
Compressive Modulus @ 73 °F PSI 480,000
Compressive Strength @ 73 °F, 10% strain PSI 21,500
Izod (charpy) Impact Strength @ 73 °F ft-lbs/in 0.6
Rockwell Hardness @ 73 °F M (R) Scale 111
Coefficient of Friction Static
Coefficient of Friction Dynamic, 40 PSI, 50 FPM
Wear (K) Factor in3-min/ft-lbs-hr
Limiting PV psi-fpm
Thermal Vicat Softening Point °F 426
Melting Temperature °F
Heat Deflection Temperature @ 66 °F 410
Heat Deflection Temperature @ 264 °F 394
Service Temperature Intermittent °F 392
Service Temperature Long Term °F 338
Thermal Expansion (CLTE) in/in/°F 3.1*10-5
Specific Heat BTU/lb-°F
Thermal Conductivity BTU-in/hr-ft2-°F 1.5
Electrical Surface Resistivity ohms/square
Volume Resistivity ohm-cm 1.0*1017
Dielectric Strength V/mil 830
Dielectric Contant @ 60 HZ, 73 °F, 50% RH 3.15
Dissipation Factor @ 60 Hz, 73 °F 0.0013
Other Moisture Absorption @ 24 hrs, 73 °F % 0.25
Moisture absorption @ Saturation, 73 °F % 1.25
Flammability UL 94 V-0
Food Grade Y
Relative Cost $$ $