How does PEEK compare to PTFE?

While [PTFE](https://www.piedmontplastics.com/blog/a-guide-to-peek-ptfe-and-premium-polymers) excels in low-friction performance, PEEK offers significantly higher strength, stiffness, and thermal stability.

PEEK Plastic Sheet, Rod, and Tube

Common Properties

Typical Rod Lengths 3 - 5 feet
Common Profiles Sheet, Rod, Tube
Typical Thickness Size 0.04 - 4 inches
Typical Lengths 12 - 48 inches
Common Brand Names TECAPEEK®, Ketron®, SustaPEEK, Semitron™
Friendly Names PEEK Plastic, Polyetheretherketone
Typical Rod Diameters 0.25 - 6 inches
Typical Tube Diameter 30 – 210 mm
Typical Widths 12 - 24 inches

Electrical Properties

Surface Resistivity 10^16 ohm/sq
Electrostatic Discharge (ESD) Sensitivity Moderate
Volume Resistivity 10^16 ohm·cm
Dielectric Strength 160-220 kV/mm
Dissipation Factor 0.001-0.003
Comparative Tracking Index (CTI) 150 volts
Arc Resistance 120-160 secs
Dielectric Constant 3.2-3.4

Mechanical Properties

Izod Impact, Notched 53 J/m
Falling Dart Impact 28 J
Shear Strength 80 MPa
Izod Impact, Unnotched 800 J/m
Tensile Strength, Ultimate 90 MPa
Flexural Modulus 4.2 GPa
Elongation at Break 20 %
Hardness, Rockwell R 126 Rockwell R
Modulus of Elasticity 3.6 GPa
Bearing Yield Strength 137 MPa
Flexural Yield Strength 120 MPa
Compressive Yield Strength 118 MPa
Tensile Strength, Yield 70 MPa
Gardner Impact 27 J
Elongation at Yield 6 %
Instrumented Impact Total Energy 49 J/m

Physical Properties

Linear Mold Shrinkage 0.005 mm/mm
Melt Flow 12 g/10 min
Moisture Absorption at Equilibrium 0.15 %
Density 1.2 g/cm³
Water Absorption 0.2 %

Regulation Properties

USP Class VI RoHS Compliant FDA NSF REACH Compliant D635 Self Extinguishing FAR 25.853 Flammability UL-94 Flame Class

Thermal Properties

Deflection Temperature at 0.46 MPa (66 psi) 160.0 °C
Max Continuous Operating Temperature in F 500.0 °F
CTE, linear, Transverse to Flow 150.0 um/m/°C
Thermal Conductivity 0.25 W/m·K
Flammability V-0 UL94
Vicat Softening Point 325.0 °C
Deflection Temperature at 1.8 MPa (264 psi) 152.0 °C
Minimum Operating Temperature in F -148.0 °F
CTE, linear 47.0 um/m/°C

Get a Quote for PEEK at Piedmont Plastics

PEEK, short for polyetheretherketone, is one of the highest-performing thermoplastics available today. As a high performance engineering plastic, PEEK has excellent chemical resistance, mechanical strength, and dimensional stability. It also performs well at continuous operating temperatures up to 338 °F.

Offered in sheet, rod, and tube, PEEK provides exceptional strength, stiffness, and wear resistance, along with outstanding thermal and chemical stability. Its balance of mechanical performance and machinability makes it an ideal choice for demanding environments where other plastics fail.

At Piedmont Plastics, we supply PEEK material to engineers, fabricators, and manufacturers across industries ranging from aerospace and automotive to medical and semiconductor. Contact us today to learn how PEEK can support your project requirements.

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Key Features of PEEK

PEEK is engineered to maintain reliable performance under extreme conditions. Its key properties include:

Excellent mechanical strength and stiffness
High temperature resistance (up to 480°F continuous use)
Outstanding chemical resistance, even against aggressive solvents
Low moisture absorption for dimensional stability
Superior wear and abrasion resistance
Excellent electrical insulating properties
Easy to machine into precision components

Benefits and Advantages

Choosing PEEK plastic means investing in a material that reduces downtime, increases reliability, and extends service life. Its resistance to heat, chemicals, and wear makes it a cost-effective solution for long-term performance.

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Common Applications

PEEK is trusted in industries that demand uncompromising performance:

Aerospace components: lightweight, high-strength parts for extreme environments
Medical devices: biocompatible and sterilization-resistant components
Semiconductor equipment: low outgassing and chemical resistance for cleanroom use
Automotive parts: durable components for engines, transmissions, and fuel systems
Oil and gas: seals, valve seats, and wear rings exposed to high pressures and chemicals
Electrical and electronic: insulating parts for high-voltage applications

Frequently Asked Questions

Below are some commonly asked questions about PEEK plastic and its variations:

PEEK is available in sheet, rod, and tube to suit a variety of machining and fabrication needs.

Yes. Certain grades of PEEK are engineered for medical use, providing biocompatibility and resistance to sterilization methods. Contact your Piedmont Plastics sales representative to discuss the best option for your specific application requirements.

These are reinforced grades of PEEK designed to improve stiffness, strength, and wear resistance for more demanding applications.

While PTFE excels in low-friction performance, PEEK offers significantly higher strength, stiffness, and thermal stability.

Piedmont Plastics offers a wide selection of PEEK sheet, rod, and tube materials. With more than 50 locations across North America, we’re ready to supply the exact size and grade you need.

Why Buy from Piedmont Plastics?

Piedmont Plastics is your trusted source for high-performance plastics like PEEK. Partnering with us means more than purchasing material; you gain a dependable solutions provider committed to your success.

Nationwide network of branches: Local inventory and quick delivery across North America.
Custom cutting and fabrication services: Tailored solutions to match your exact specifications.
Deep industry expertise: Knowledgeable staff to guide material selection and applications.
Wide product selection: One-stop access to engineering plastics, composites, and specialty materials.