PEEK is the highest-grade engineering plastic in the world of 3D printing, offering metal-like strength, continuous heat resistance up to 240°C, chemical resistance, and flame retardancy according to UL94 V-0 standards. It is suitable for aerospace, automotive, industrial, and medical applications that require maximum durability.

Among all 3D printing materials, there is a group of materials classified as "High-Performance Engineering Plastic" due to their strength, durability, and heat resistance comparable to metals. This material is PEEK (Polyether Ether Ketone), which has been used for a long time in the aerospace, automotive, energy, and medical industries before being developed to be formable with FDM 3D printers.

Metal-level Mechanical Properties

PEEK has a high Tensile Strength of 80 MPa, a Flexural Strength of 130 MPa, and an Impact Resistance of 140 kJ/m², which are values comparable to some metals. This allows parts printed from PEEK to replace metal components in applications where weight reduction is desired while maintaining full structural integrity. Additionally, the layer bonding of PEEK is exceptionally good, resulting in higher Z-strength and dimensional accuracy than general printing materials.

Continuous Heat Resistance up to 240°C

A key feature that differentiates PEEK from other engineering materials is its ability to withstand continuous high temperatures up to 240°C, and short-term exposure up to 260°C, while maintaining structural stability even in prolonged high-temperature environments. This makes it suitable for components near heat sources, such as engine parts, exhaust system components, or equipment in high-temperature manufacturing processes.

Chemical Resistance and Inherent Flame Retardancy

PEEK has very high chemical resistance to oils, automotive fluids, halogenated hydrocarbons, alcohols, and aqueous solutions. It also exhibits excellent resistance to hydrolysis in hot water and is practically insoluble in common solvents. Furthermore, PEEK possesses inherent flame retardancy according to UL94 V-0 standard and self-extinguishes when the heat source is removed, making it suitable for applications with high fire safety requirements.

Biomaterial for Medical Applications

Due to its biocompatibility, biostability, and radiolucency, PEEK is widely used in the medical field, particularly for manufacturing orthopedic and spinal implants, fracture fixation devices, and various surgical instruments. This is because it is highly resistant to wear and chemical degradation and can undergo various sterilization processes.

Applications in Various Industries

PEEK is suitable for dynamically stressed parts in a variety of industries, including automotive, aerospace, general industrial, and chemical processing. Another advantage is that PEEK can be melted and reprocessed without losing its original properties, making it an environmentally friendly and cost-effective alternative compared to using metals or other polymers.

Things to Know Before Printing with PEEK

Since PEEK requires high temperatures for processing, it is essential to use a professional 3D printer that supports sufficiently high nozzle and heated chamber temperatures. Filaments should be stored in a dry, cool, and dark place. Before use, they should be dried in a filament dryer to achieve the best printing results. Printing should be done in an enclosed system with a temperature-controlled chamber to reduce shrinkage or warping during printing. Additionally, the build plate and nozzle should be cleaned thoroughly before each job to ensure good adhesion and consistent surface quality.

Conclusion

PEEK is the answer for those who need a 3D printing material that is as strong as metal, highly heat-resistant, chemically resistant, and inherently flame-retardant. It is suitable for advanced engineering applications in aerospace, automotive, energy, and medical industries that demand maximum performance without relying on traditional metal components.

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3D Printing Engineering Filament High Performance Material PEEK

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