Materials in this family of polymers are chemical compounds with ether and ketone groups. Compared to other plastics, they have very high glass transition and melting temperatures, which is why they are used in high-temperature applications. PAEK materials are semi-crystalline aromatic polyetherketones with excellent mechanical properties even at high temperatures. They permit continuous operating temperatures of up to 260°C. They are flame retardant and have high chemical resistance, hydrolysis resistance, high stiffness and strength, as well as very good tribological properties.
Thanks to their long service life, PAEK polymers are often used to make high-performance molded parts in industrial contexts, e.g. bearing cages, gearwheels and impellers in pumps and high-pressure systems, especially ones that come into contact with aggressive media. The medical field uses them as a biocompatible material to manufacture sterilizable medical devices or patient-specific implants. They are more cost-efficient than metal implants, and they also avoid some of the associated side-effects, such as sensitivity to the weather. The aerospace industry uses this inherently flame-retardant material as a substitute for metal in the interior and air conditioning systems.
This medium-gray high-performance plastic from the group of polyetherketoneketones (PEKK) consists of 23% carbon fibers encapsulated (compounded) in the round powder grains of the material. By comparison with 3D-printed components, which have dry mixed carbon fibers, the properties of parts made from HT-23 are almost isotropic. They are also chemically resistant, with a high melting point, and their inherent flame-retardant properties are similar to ULTEM™ filament*. The material is approved for parts destined for the interior of trains under DIN EN 45545-2:2016, Requirement Sets R1 and R24.
Typical mechanical properties
|Tensile modulus||6500 MPa|
|Tensile strength||71 Mpa|
|Elongation at break||1.16% XY|
|Melting temperature (20°C/min)||302°C|
|Heat deflection temperature (1.80 MPa)||212°C|