250g Reel of CF-PEKK

CarbonX™ Carbon Fiber PEKK 3D Printing Filament


CarbonX™ Carbon Fiber PEKK 3D Filament

PEKK (PolyEtherKetoneKetone) is one of the highest-performance polymers in world.  Developed in partnership with Arkema - a leading supplier of ultra-performance materials. 

Aerospace-Grade Performance.  Made using Kepstan® PEKK and Toray® Aerospace-Grade T800 24K Chopped Carbon Fiber.  This compound was created for extreme applications where exceptional thermal, mechanical, and chemical resistance properties are required.  


CarbonX® CF-PEKK has a wider processing window than PEEK and typically prints with extruder temps between 360-390°C, whereas CF-PEEK often requires extruder temps above 400°C.  CarbonX™ PEKK has a lower rate and degree of crystallinity than PEEK, which aids in its ease of printing.  However, once printed and annealed, PEKK parts exhibit superior performance vs. PEEK.  Easier to print + superior performance!

CarbonX™ CF-PEKK product attributes include:

  • Toray® T800 24K Aerospace-Grade Carbon Fiber
  • Keptstan® Aerospace-Grade PEKK
  • PEKK is substantially easier to print than PEEK
  • Glass Transition Temp (Tg) of 162°C (20°C higher than PEEK)
  • Melt Temp (Tm) of 335°C  (allows for lower print temps than PEEK)
  • Inherent flame resistance (UL94 V-0)
  • Outstanding mechanical, thermal, and chemical resistance
  • Continuous Use Temperature (CUT) of 260°C, higher for short durations
  • Excellent resistance to a broad range of chemicals, such as those used in the oil/gas, automotive, aerospace, industrial, and chemical processing industries

Filament Specifications:

  • Diameter:  1.75mm (+/- 0.05mm)
  • Larger reel quantities available upon request

Recommended Print Conditions:

  • Extruder Temp:  355 - 385°C 
  • Bed Temp: 120 - 140°C
  • Bed Prep: Ultem™ Tape is the ideal build surface, glue stick on clean glass is suitable
  • Enclosure temp (if your printer is equipped):  70 - 150°C
  • Print Speed:  10-50 mm/s for 0.24mm layer height, fast as results dictate
  • Nozzle Diameter:  Minimum of 0.4mm or larger (to avoid nozzle obstructions)
  • Nozzle Construction:  Carbon fiber materials are abrasive and will damage brass nozzles.  We recommend a hardened steel nozzle for printing with all CarbonX™ and Glass-Fiber grades.  Please see our collection of A2 Hardened Nozzles HERE.  
  • Minimum Layer Height:  We recommend layer height of 60% of nozzle diameter for printing our CarbonX™ CF grades.  Therefore, for a 0.4mm nozzle, the minimum layer height should be 0.24mm or larger.  CF grades exhibit exceptional surface quality and layers below 0.24mm are generally not required to maximize surface appearance.  
  • Extrusion multiplier:  start at 1.0 and adjust from there.
  • First layer height:  keep as close to 100% as your printer will allow - CF does not like layers below 0.2mm

Annealing (post crystalizing) 3D Printed PEKK Parts:  Parts printed with PEKK must be annealed after printing to ramp-up the crystallinity in the resin.  This will maximize mechanical, thermal, and chemical resistance properties.   

  • Step 1:  Place part in an oven and raise the temperature to 160c, allow to remain at that temperature for 30 minutes.  
  • Step 2:  Raise the oven temperature to 200c and allow the part to remain at this temperature for 2 hours.  Allow to cool prior to handling part.