PEEK is a high-performance thermoplastic with a high thermal resistance and made quite an impression on the industry as substitute for steel and titanium because of its high mechanical resistance. PEEK can also be used for the production of medical applications and is suitable for sterilisation. In addition, it is a food-compliant material and therefore suited for the use in the food processing industry. It has very good resistance to UV rays, which is why it is recommended for outdoor use. Because of its 340°C melting point, it requires an enclosed 3D printer for the processing. An unchanging temperature field is mandatory.