Peek characteristics derive from polyetheretherketone properties. Its durability and broad temperature range – especially its resistance to high temperatures – make it an effective solution for manufacturers. Demand for this material is increasing among manufacturers as the need increases for higher mechanical properties at lighter weight. PEEK polymer can actually be used as an alternative to metal in many instances. Here’s a look at the PEEK properties that make it a versatile material across a range of applications. We’ll also look at the material’s disadvantages
● Excellent high-temperature resistance:
PEEK products can generally withstand temperatures up to 180°C continuous use, ensuring a long life and reliability in harsh environments. PEEK temperature range varies, depending on the grade. Some grades can be used continuously at temperatures up to 250°C. Note, PEEK material temperature range starts at -70°C. PEEK material melting temperature is generally 343°C.
● Mechanical strength and high dimensional stability:
PEEK plastic material exhibits excellent properties in terms of strength, stiffness, creep and fatigue, enabling the manufacture of lightweight parts, and better performance over time. Wear resistance in abrasive or humid environments, a low coefficient of friction and excellent wear resistance can help prolong the life and maintain the integrity of the parts.
● Lightweight:
PEEK material properties translate to light weight. It has a low density, typically about 1/5 to 1/6 of the weight of metal, which is why it’s often the preferred material.
● Chemical resistance:
A PEEK component has outstanding chemical resistance, even at high temperatures, thanks to the material’s ability to withstand many acids, bases, hydrocarbons and organic solvents.
● Electrical performance:
Is PEEK electrically conductive? No. PEEK electrical properties are excellent over a wide range of temperatures and frequencies. With exceptional insulation characteristics, PEEK is outstanding for electrical engineering and electronics – especially when you factor in PEEK heat resistance.
● Thermal insulation:
The thermal properties of PEEK give it a low coefficient of thermal conductivity. Hence, PEEK offers excellent insulation. PEEK mechanical properties and high-temperature resistance make it an ideal choice for thermal stability.
● Hydrolysis resistance:
PEEK products have been used successfully to improve the reliability of components. With low moisture absorption, PEEK does not hydrolyse in the presence of water (freshwater, salt water or steam), even at high temperatures.
● Recyclable:
The properties of Peek make it completely recyclable and halogen-free. The polymer PEEK also complies with the European RoHS directive and REACH.
● Cost:
PEEK material price is relatively expensive compared to many other thermoplastics. The cost of PEEK can be a limiting factor, especially for applications that require large volumes or where cost-effectiveness is a primary consideration.
● Processing Challenges:
PEEK plastic melting point is typically around 343°C, which can make it challenging to process. Specialised equipment and processing techniques, such as injection moulding machines capable of high-temperature operation, are often required. PEEK plastic in injection moulding is common, but this can add complexity and cost to manufacturing processes.
● Limited Availability:
Compared to more common thermoplastics like polypropylene or polyethylene, PEEK may have limited availability in certain regions or markets. This can result in longer lead times or higher costs for sourcing PEEK components or materials – always check availability early with your PEEK material supplier.
● Low resistance to UV:
Plastic PEEK is generally susceptible to degradation when exposed to prolonged UV radiation, particularly in outdoor or high-exposure environments. However, additives such as UV stabilisers can mitigate degradation for PEEK polymer uses.
● Limited Color Options:
PEEK is typically available in natural (light brown) or black colour variations. Compared to some other polymers, it offers a limited range of colour options. This may be a consideration for applications where colour coding or aesthetics are important.
