Omar Khalid
Polyether ether ketone (PEEK) is a high-performance engineering plastic with excellent chemical and corrosion resistance at elevated temperatures. PEEK is available in a variety of grades, including unfilled, glass-filled, and carbon-fiber-reinforced, each offering enhanced properties for specific applications. PEEK is widely used in industries such as aerospace, food and beverage, medical, marine, and electronics due to its superior thermal, chemical, and mechanical properties. With its high strength and modulus approximating human bone, PEEK is also biocompatible and suitable for medical implants and skull reconstruction.
| Characteristics | Values |
|---|---|
| Melting Point | 343 °C / 649.4 °F |
| Continuous Service Temperature | 170 °C / 338 °F |
| Heat Deflection Temperature | Over 300 °F |
| Tensile Strength | 16,000 psi |
| Flexural Strength | 25,000 psi |
| Flexural Modulus | High |
| Electrical Insulation | Excellent |
| Thermal Insulation | Excellent |
| Thermal Conductivity | High |
| Chemical Resistance | Excellent |
| Hydrolysis Resistance | Excellent |
| Wear Resistance | High |
| Load-Carrying Capabilities | Outstanding |
| Radiation Resistance | Yes |
| Solvent Resistance | Wide Range |
| Sterilisation Resistance | Yes |
| Colour | Beige |
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What You'll Learn
PEEK plastic is a high-performance engineering plastic
PEEK plastic, or polyether ether ketone, is a high-performance engineering plastic with a unique combination of properties that make it suitable for a wide array of uses across almost every industry. It is a stiff, high-temperature material with excellent chemical, mechanical, electrical, and thermal resistance properties. PEEK plastic can withstand continuous use at temperatures up to 338°F (170°C) and has a melting point of over 700°F. It also exhibits high tensile strength (16,000 psi) and high flexural strength (25,000 psi).
The versatility of PEEK plastic is further enhanced by the variety of grades available, each offering specific benefits. For instance, unfilled or virgin PEEK is the most ductile and toughest grade, with excellent water and steam resistance. Glass-fiber-reinforced PEEK offers enhanced mechanical and thermal properties, superior electrical insulation, and improved flexural modulus (resistance to bending). On the other hand, carbon-fiber-reinforced PEEK boasts the highest strength and stiffness, superior wear resistance, and improved load-carrying capabilities.
The processing and machining of PEEK plastic are important considerations. While PEEK can be challenging and expensive to process through methods like injection moulding due to its metal-like characteristics, it is readily machinable in its solid state using CNC milling machines. This machinability, coupled with its superior cleanliness, makes PEEK ideal for complex machined parts requiring tight tolerances, such as gears, ferrules, and medical components.
PEEK plastic's exceptional characteristics make it a top choice for demanding applications. It is commonly used in aerospace, oil and gas, food and beverage processing, semiconductor equipment, marine, electronics, and medical industries. PEEK's ability to withstand harsh environments, high temperatures, and chemical exposure makes it a reliable material for critical components.
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It is lightweight, wear-resistant, and easy to process
PEEK plastic, or polyether ether ketone, is a high-performance engineering plastic with excellent mechanical strength, dimensional stability, and chemical resistance. It is lightweight, wear-resistant, and easy to process, making it a versatile material for a wide range of applications.
One of the key advantages of PEEK plastic is its lightweight nature. While specific weight and density figures are not readily available, with a specific gravity typically ranging from 1.27 to 1.31, PEEK plastic is significantly lighter than many other engineering materials, such as metals. This lightweight property makes it ideal for applications where weight is a critical factor, such as in the aerospace and automotive industries.
PEEK plastic is also highly wear-resistant. Virgin PEEK, which is unfilled, exhibits natural abrasion resistance, making it suitable for applications where low friction and high durability are required. Additionally, PEEK plastic is resistant to a wide range of chemicals, including steam, water, and seawater, and various cleaning chemicals. This chemical resistance further contributes to its wear-resistant properties, as it can withstand exposure to corrosive substances without degrading.
The processing of PEEK plastic is facilitated by its ability to be melted and moulded. PEEK melts at a relatively high temperature compared to other thermoplastics, typically around 343°C (649.4°F or 662°F). Within this melting temperature range, it can be processed using injection moulding or extrusion methods. PEEK can also be processed into filament form through fused deposition modelling (FDM) or fused filament fabrication (FFF) technology, enabling the creation of medical devices and other complex shapes through 3D printing.
The ease of processing PEEK plastic extends to its machinability in its solid state. PEEK is commonly machined using CNC milling machines to produce high-quality plastic parts. These parts are thermostable and exhibit excellent electrical and thermal insulation properties. Filled grades of PEEK, such as glass-filled PEEK, can also be CNC machined, but careful management of stresses in the material is necessary.
Overall, the lightweight, wear-resistant, and easy-to-process nature of PEEK plastic makes it a highly versatile and valuable material for a broad range of engineering applications, including aerospace, automotive, medical, and chemical industries.
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PEEK plastic is available in a variety of grades
PEEK (polyether ether ketone) plastic is available in a variety of grades, each offering unique properties for specific applications. This adaptability has made PEEK plastic a popular choice across a wide range of industries.
One of the most common grades is unfilled or virgin PEEK, which is a general-purpose grade known for its toughness and elongation properties. It is resistant to water and steam, making it suitable for applications requiring inertness and ductility. Another popular grade is the 30% glass-fiber-reinforced PEEK, which offers enhanced strength, stiffness, and stability while reducing the expansion rate. This grade is ideal for structural applications and high-load parts.
PEEK plastic is also available in a 30% carbon-fiber-reinforced grade, which has the highest strength and stiffness properties among all PEEK grades. This grade offers exceptional wear resistance and improved load-carrying capabilities. Additionally, it has a higher thermal conductivity than unfilled PEEK, making it advantageous for heat dissipation.
For applications requiring detection, such as in the food and beverage or pharmaceutical industries, optical, metal, and X-ray detectable PEEK grades are available. These grades are designed to be detectable by X-ray or metal detection systems while still maintaining the desirable properties of PEEK plastic.
The versatility of PEEK plastic is further demonstrated by its ability to be processed through various methods, including injection moulding, extrusion, and 3D printing. This adaptability, combined with its range of grades, makes PEEK plastic a valuable material for numerous industries, including aerospace, food and beverage, medical, marine, and electronics.
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It has high tensile strength and temperature resistance
PEEK (polyether ether ketone) is a high-performance engineering plastic with excellent tensile strength and temperature resistance. It is a popular choice for applications that require high-performance plastics, owing to its unique combination of properties. PEEK is lightweight yet incredibly strong and dimensionally stable, making it suitable for a wide array of uses across almost every industry.
PEEK's high tensile strength (16,000 psi) and flexural strength (25,000 psi) contribute to its durability and load-bearing capabilities. It can continuously serve at temperatures of 500°F and has a melting point of over 700°F, making it suitable for applications that require superior thermal properties. PEEK's high-temperature resistance also contributes to its dimensional stability, as it maintains its stiffness at elevated temperatures.
The different grades of PEEK offer enhanced properties for specific applications. For instance, 30% glass-fiber-reinforced PEEK has increased flexural modulus and excellent electrical and thermal insulation characteristics. It is often used in structural applications and high-load parts that require superior stiffness, strength, and stability. On the other hand, 30% carbon-fiber-reinforced PEEK offers the highest strength and stiffness, outstanding wear resistance, and improved thermal conductivity. This grade is ideal for applications that require efficient heat dissipation.
PEEK's high-temperature resistance and tensile strength make it a preferred choice for industries such as aerospace, oil and gas, food and beverage processing, and semiconductor equipment manufacturing. It is also widely used in medical applications due to its ability to withstand the sterilisation process. PEEK's unique properties, such as its high-temperature performance and tensile strength, make it a versatile and reliable material for a wide range of demanding applications.
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PEEK plastic is used in a wide variety of applications
PEEK (polyether ether ketone) plastic is a high-performance thermoplastic with a unique combination of mechanical, chemical, electrical, and thermal properties. Its exceptional thermal stability, mechanical strength, and chemical compatibility make it ideal for various applications across multiple industries.
One of the key advantages of PEEK plastic is its ability to retain its structural integrity under heavy loads, stress, and impact. This makes it well-suited for applications requiring superior strength and stiffness, such as structural components and high-load parts. PEEK's high tensile strength and resilience against impact further contribute to its versatility.
In the aerospace industry, PEEK plastic is used for bearings, piston parts, and other components that require exceptional thermal and mechanical performance. PEEK's lightweight yet rigid nature, coupled with its ability to withstand high temperatures, makes it a valuable material for aerospace applications.
PEEK plastic is also commonly used in the medical field. Its superior cleanliness, machinability, and resistance to radiation and sterilization methods make it ideal for medical devices, dentures, and implants. PEEK's ability to be autoclaved for increased sanitation further enhances its suitability for medical applications.
Additionally, PEEK plastic finds applications in the food and beverage, marine, and electronics industries. Its resistance to seawater, solvents, and chemicals makes it suitable for various marine and submerged environments. PEEK's electrical properties and insulation characteristics also make it valuable for electronics and semiconductor manufacturing.
The versatility of PEEK plastic lies in its ability to meet specific requirements through different grades, such as unfilled PEEK, glass-fiber reinforced PEEK, and carbon-fiber reinforced PEEK, each offering enhanced benefits for particular applications.
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Frequently asked questions
PEEK stands for polyether ether ketone, a type of thermoplastic polymer. It is a high-performance engineering plastic with excellent mechanical strength, chemical resistance, and dimensional stability.
PEEK plastic is known for its high-temperature resistance, retaining its stiffness at temperatures up to 338°F (170°C) and with a melting point of over 700°F. It also has high tensile strength, flexural strength, and toughness. PEEK is resistant to steam, water, seawater, and a wide range of solvents.
PEEK plastic is available in various grades, including unfilled or virgin PEEK, 30% glass-fiber reinforced PEEK, and 30% carbon-fiber reinforced PEEK. Each grade offers enhanced properties for specific applications, such as improved electrical and thermal insulation, increased stiffness, or higher strength.
Due to its unique properties, PEEK plastic is used across a wide range of industries, including aerospace, food and beverage, medical, marine, electronics, and semiconductor equipment. It is often used for complex machined parts and components that require tight tolerances and superior performance in challenging environments.
PEEK can be processed through conventional methods such as injection moulding, extrusion, and CNC milling. It can also be 3D printed using FDM or FFF technology for certain applications, such as medical devices. The processing conditions, such as temperature, can influence the crystallinity and mechanical properties of the final PEEK product.
