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PolyEtherEtherKetone (PEEK) is a high-performance engineering thermoplastic that offers chemical and water resistance while operate at higher temperatures. Peek Unfilled is a general-purpose grade that is unreinforced and offers the highest elongation and toughness of all PEEK grades. Unfilled PEEK is available in sheet and rod forms in multiple colors including: natural (a very light brown or tan) and black colors. Black PEEK is ideal for instrument components where aesthetics is important, as well as for seal components where ductility and inertness are important. All unfilled PEEK grades comply with FDA regulation 21 CFR 177.2415 for repeated food contact.

Benefits of PEEK Unfilled

  • Maintains shape and physical properties under extremely high temperatures (480 degrees max operating temperature)
  • FDA approved for repetitive food contact
  • Resistant to harsh chemical environments
  • Minimal smoke and toxic-gas emissions

Additional formulations (i.e., glass-filled, mineral-filled, carbon-filled, bearing, and medical grades) and variants within these grades (FDA compliant, static dissipative, high temperature) are available to meet specific application demands. Contact an Emco Industrial Plastics representative who can help you choose the correct material to meet the needs of your application.

Brand Names

  • Ketron® HPV
  • Semitron® ESd 480
  • Susta® PEEK
  • Tecapeek™
  • Unitrex®
  • Vestakeep PEEK
  • Victrex® PEEK

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
PolyEtherEtherKetone (PEEK)

Available In
Sheet, Rod, Tube

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Technical Information

Stock Products Properties Applications Advantages Grades

Stock Products

Sheet 0.03″ – 2″ TH Up to 24″ x 48″; CTS Natural, Black
Rod 0.25″ – 6″ DIA Std. foot lengths; CTS Natural, Black
Tube Available

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


Physical PropertiesUnitsASTMResults
Density lb/in³ D792 0.047
Water Absorption, 24 hrs % D570 0.1
Mechanical PropertiesUnitsASTMResults
Tensile Strength @yield psi D638 16000
Tensile Modulus psi D638 500000
Tensile Elongation @Break % D638 20
Flexural Strength psi D790 25000
Flexural Modulus psi 400000 600000
Compressive Strength psi D695 20000
Compressive Modulus psi D695 50000
Hardness, Rockwell R D785 R126 (M100)
IZOD Impact Strength Notched ft-lb/in D256 1
Thermal PropertiesUnitsASTMResults
Coefficient of Linear Thermal Expansion (x 10-⁵ in./in./°F) D256 2.6
Heat Deflection Temp at 264 psi °F 320
Melting Temperature °F D3418 644
Max Operating Temp °F 480
Thermal Conductivity BTU-in/ft²-hr-°F C177 1.75
Electrical PropertiesUnitsASTMResults
Dielectric Strength. 1/8″ th. V/mil D149 480
Dielectric Constant @1 MHz D150 3.3
Dissipation Factor @1 MHz D150 0.003
Volume Resistivity, 50% RH ohm-cm D257 4.9 x 10¹⁶

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.


  • Pump gears, wear plates
  • Insulators, connectors
  • Seals, washers
  • Bearings, bushings
  • Machine omponents for semicondutor, electrical, medical, food processing
  • Aerospace parts


  • Excellent chemical resistance
  • Very low moisture absorption
  • Good wear and abrasion resistance
  • Unaffected by continuous exposure to hot water or steam
  • Good radiation resistance
  • Excellent flexural, impact, and tensile characteristics
  • High strength alternative to fluoropolymers


  • Unfilled
  • Glass filled
  • Carbon 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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