Which Filament

Materials › PETG

Price tier $$$

PETG-CF

PETG filled with carbon fiber. Stiffer, with a matte finish and cleaner prints.

Also called: carbon fiber petg, carbon fibre petg, petg carbon fiber, cf petg

Good for

  • Functional parts
  • Load-bearing / mechanical
  • Outdoor / sunlight

Not great for

  • First-time friendly

Typical settings

Nozzle
240-270 °C
Bed
65-80 °C
Speed
40-100 mm/s
Cooling
30-60% part fan

You'll need

  • Hardened steel (or ruby-tipped) nozzle
  • Dry filament

Ratings

Strength
4 out of 5
Heat resistance
3 out of 5
Flexibility
2 out of 5
Ease of printing
3 out of 5
Print speed
3 out of 5
Looks / finish
4 out of 5
Durability
3 out of 5

Ratings are relative, 1-5, for a typical filament of this type. Start from your filament maker's recommended settings.

Use it for

  • You want PETG’s weather resistance with extra stiffness: drone and RC frames, enclosure brackets, printer upgrade parts, and structural parts that must hold shape.
  • Carbon fiber also reduces stringing, so prints often look cleaner than plain PETG.

Watch out for

  • It wears brass nozzles quickly. Use hardened steel.
  • Less impact-tolerant than plain PETG. It trades some toughness for stiffness.
  • Costs noticeably more.

Tips

  • Dry it thoroughly (about 65 °C for 5-8 hours) and start from the manufacturer’s profile.
  • Heat resistance is only slightly above plain PETG (vendor datasheets list a heat deflection temperature of roughly 74-77 °C), so do not count on it for very hot places.

Sources

Figures vary by brand and test method; check your filament's datasheet.

Commonly printed in PETG-CF

Other PETG types

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