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Polyetherimide (PEI), also trademarked as Ultem®, is an amorphous, amber-to-transparent thermoplastic. Rated for continuous use in temperatures up to 356° F (180° C), it also features high tensile strength along with good flame and chemical resistance.

Ultem&reg PEI is often used instead of polysulfone and is commonly specified for aerospace, automotive, medical, and packaging applications. The unfilled grade, Ultem&reg 1000, offers outstanding mechanicial, thermal, and environmental properties, excelling in hot air and water environments. It’s hydrolytically stable, retaining 85% of its tensile strength after 10,000 hour boiling water immersion and 100% of tensile strength after 2,000 steam autoclave cycles at 270°F. It is also resistant to UV and gamma radiation. This material can be easily machined, and it provides cost savings over ceramics in electrical applications. It also offers cost and weight savings over stainless steel in medical applications.

Brand Names

  • Ultem 1000®
  • Tempalux®
  • Tecapei
  • Hydex®
  • Meldin®
  • Semitron® ESd 420
  • Hydel® PEI-7

Emco Industrial Plastics doesn’t claim to represent all of the manufacturers or trade name products listed. This list is intended as a guide of typical materials available for purchase from Emco Industrial Plastics, Inc. For additional information, contact an Emco Industrial Plastics representative by filling out the form below.

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At a Glance

Generic Name
Polyetherimide

Available In
Sheet, Rod, Film

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Technical Information

Stock Products Properties Applications Advantages Grades

Stock Products

TypeSizeLengthColor
Sheet 3/32”–4” 12” x 12”, 24”; 24” x 24”, 36”, 48”, CTS Natural (Amber)
Rod 1/4”–8” dia. 96” L; CTS Natural (Amber)
Film 0.001”–0.040” th. Up to 27” roll width; CTS lengths Natural (Amber)

Give us your cut-to-size dimensions. We will precision-cut these plastics to your exact size. Additional sizes and colors available upon request.

Properties

Physical PropertiesUnitsASTMResults
Density lb/in³ D792 0.046
Mechanical PropertiesUnitsASTMResults
Tensile Strength psi D638 16,500
Tensile Modulus psi D638 475,000
Tensile Elongation @ Break % D638 80
Flexural Strength psi D790 20,000
Flexural Modulus psi D790 500,000
Compressive Strength psi D695 22000
Compressive Modulus psi D695 480.000
Hardness, Rockwell R D785 R125/M112
IZOD Impact Strength Notched ft-lb/in D256 0.5
IZOD Impact Strength Un-notched ft-lb/in D256
Thermal PropertiesUnitsASTMResults
Heat Deflection Temp at 66 psi °F D648
Heat Deflection Temp at at 264 ps °F D648 392
Melting Temperature °F D3418 419
Max Operating Temp °F D3418 340
Thermal Conductivity BTU-in/ft²-hr-°F C177 0.9
Flammability Rating UL94 V-O
Electrical PropertiesUnitsASTMResults
Dielectric Strength, 1/8″ th. V/mil D149 830
Dielectric Constant @ 1MHz D150 3.15
Dissipation Factor @ 1MHz D150 0.0013
Surface Resistivity ohms/sq D257
Volume Resistivity, 50% RH ohms/cm D257 6.7 x 10¹⁷

NOTE: The property values presented above 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.

Applications

  • Connectors
  • Pump, valve parts
  • Medical equipment components
  • Aircraft engine components

Advantages

  • Inherent flame resistance
  • Exceptional tensile and flexural strength
  • FDA compliant
  • Broad chemical resistance
  • UV stable
  • Hydrolytic stability

Grades

  • Unfilled
  • Glass filled

NOTE: Several grades of this material are available. For additional information regarding this plastic, contact your Emco Industrial Plastics representative or call 973-862-4148.

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