3D Printing with PEKK
PEKK (polyetherketoneketone) is a relative of PEEK in the PAEK family, and offers similar high-performance mechanical properties, as well as temperature and chemical resistances.
Unlike PEEK, the keto linkages in PEKK enable tuning of the crystallinity and crystallization rates, resulting in a pseudo-amorphous material that does not require adding any plasticizers or unwanted fillers. For these reasons, PEKK is easier to print and offers better dimensional stability, superior layer bonding, without sacrificing its high-performance properties.
- Market leading X/Y and Z tensile strength
- Equivalent rigidity to many metals
- High strength, toughness and impact resistance
- Excellent dimensional stability
- Low permeability
- Low wear and friction
- Stands up well to abrasion
- Good creep resistance
- Nozzle temperature: 320 - 360°C
- Bed temperature: 120 - 140°C
- Chamber temperature: 70 - 150°C
- Glass transition temperature (Tg): 160 - 165°C
- Continuous use temperature (CUT): 140 - 260°C
- Heat deflection temperature (HDT): 150 - 300°C
- Short term temperature exposure up to 300°C
Note the above values vary between pseudo-amorphous, semi-crystalline, and composite reinforced grades of PEKK. Contact our materials engineers for more details.
- Excellent resistance to chemicals
- High resistance to hydrolysis
- Excellent flame, smoke, toxicity (FST) properties
- Inherently flame retardant: UL 94 V-0 flammability rating
- Low level of smoke
When to Use PEKK for 3D Printing
Exceptional Properties & Printability
PEKK's capacity to maintain printability, even for large geometries, while providing the exceptional mechanical properties as well as chemical and temperature resistances, positions it as a versatile high-performance plastic.
Challenges with 3D Printing PEKK
Heated Build Chamber Required
PEKK’s elevated melting and glass transition temperatures require an enclosed, heated build chamber, such as the AON-M2’s, in order to achieve high quality prints that maintain dimensional accuracy.
Performance Comes at a Price
PEKK is a complex material to produce with comparable costs per kilogram to PEEK. Choosing an open filament 3D printer ensures that you have access to various top-tier suppliers, and competitive open market pricing for all materials.