Polyetheretherketone (PEEK) is a high-performance thermoplastic known for its exceptional mechanical strength, toughness, hardness, flexural strength, and torsional strength. It can be used at very high temperatures, with a heat resistance of up to +480 °F. This unique material exhibits excellent chemical resistance, very good dielectric properties, and a high resistance to various types of radiation. Importantly, PEEK is self-extinguishing according to UL 94, making it a reliable choice for safety-critical applications.

Properties of PEEK

PEEK has a range of impressive properties that make it suitable for demanding applications:

• Very high mechanical strength: PEEK offers extraordinary strength, ideal for applications requiring robust materials.
• Very high rigidity: PEEK retains its rigidity even at elevated temperatures.
• Very high thermal stability: PEEK can withstand high temperatures, maintaining its properties up to +480 °F.
• Very high dimensional stability: PEEK exhibits minimal expansion or contraction with changes in temperature or environmental conditions.
• Very high radiation resistance: PEEK has a high resistance to various types of radiation, making it suitable for use in challenging environments.
• Very high hydrolysis resistance: PEEK is resistant to hydrolysis, ensuring its durability in moist or wet conditions.
• Notch impact-strength relatively low: While PEEK is strong, it has a relatively low notch impact strength compared to some other materials.
• Low resistance to acetone: PEEK has limited resistance to acetone, which should be considered in specific applications.
• High wear resistance at higher temperatures: PEEK maintains its wear resistance even at elevated temperatures.

Applications of PEEK

Due to its exceptional properties, PEEK is used in a variety of industries and applications:

• Bearing shells: PEEK is used for bearing shells due to its high strength and durability.
• Piston rings: PEEK’s thermal stability and wear resistance make it suitable for piston rings.
• Valve seats: PEEK’s resistance to heat and chemicals makes it ideal for valve seats.
• Gears: PEEK’s rigidity and strength allow it to be used in gear manufacturing.
• Seals: PEEK’s chemical resistance and durability make it suitable for seals.
• Aviation: PEEK’s lightweight and high-strength properties make it ideal for aviation components.
• Pump vanes: PEEK’s wear resistance and durability make it suitable for pump vanes.
• Fittings: PEEK’s chemical resistance and high strength make it ideal for various fittings.
• Plug connectors: PEEK’s electrical insulation properties make it suitable for plug connectors.
• Wafer carriers: PEEK is used in the semiconductor industry for wafer carriers due to its thermal stability and chemical resistance.
• Semiconductor industry: PEEK’s high resistance to radiation and thermal stability make it a preferred material in the semiconductor industry.

Conclusion

PEEK – GEHR PEEK® is a high-performance thermoplastic that offers a unique combination of mechanical strength, thermal stability, and chemical resistance. Its self-extinguishing properties, resistance to radiation, and ability to withstand high temperatures make it ideal for a variety of demanding applications, from aviation to the semiconductor industry. With its wide range of applications, PEEK is a versatile material that meets the needs of numerous industries.