What is the difference between PETG and PETG CF?

PETG CF is PETG with carbon fibre. It is stiffer and more dimensionally stable, has a matte surface and prints slightly hotter: 250–270 °C with a bed of 90–110 °C. Ordinary PETG is tougher and more flexible, comes in many colours and prints without a hardened nozzle.

Do I need a hardened nozzle for PETG CF?

Yes. Carbon fibre acts as an abrasive and wears out a brass nozzle in a short time, which enlarges the opening and makes your prints inaccurate. Use a hardened steel nozzle or another wear-resistant material. With 0.6 mm you are less likely to get clogs than with 0.4 mm.

Can I print PETG CF on a Bambu Lab printer with AMS?

Yes. Fiberlogy PETG + CF comes on a spool of 199 mm diameter and 59 mm wide, which fits in the AMS; see also Fiberlogy spools in the AMS . Do check that your printer has a hardened nozzle and set the temperatures yourself: 250–270 °C for the nozzle and 90–110 °C for the bed.

Is PETG CF stronger than ordinary PETG?

PETG CF is above all stiffer: it bends less and holds its dimensions better. On the other hand, it stretches less and breaks sooner than ordinary PETG under a hard knock. If a part needs to be both stiff and impact-resistant, look at PCTG + CF .

PETG CF or PLA CF: which should I choose?

PLA CF is the easiest to print and very stiff, but softens at lower temperatures. PETG CF resists heat, moisture and chemicals better and is tougher. Choose PLA CF for models and prototypes used indoors, and PETG CF for parts used outdoors, in the car or in a warm environment.

PETG + CF filament

PETG with carbon fibre: stiffer, more dimensionally stable and with a matte, technical finish.

PETG CF is PETG reinforced with carbon fibre. Fiberlogy PETG + CF contains 10% carbon, which makes it considerably stiffer and more dimensionally stable than ordinary PETG, while it stays easy to print. The fibres give prints a matte, black, technical surface. Below the product you can read when to choose PETG CF, how it compares to other fibre-reinforced filaments and which settings to print it with. Read more…

1–1 of 1 products

With 10% carbon
Fiberlogy
PETG + CF
€40.95
In stock

What is PETG CF?

PETG CF, also called PETG carbon or PETG + CF, is PETG with short carbon fibres added. Fiberlogy PETG + CF contains 10% carbon fibre. The fibres make the material stiffer: a part bends less under load and holds its dimensions better. The base is still PETG, so the chemical resistance and ease of printing are largely retained. The filament is black and comes on a 0.75 kg spool. You can read more about PETG in general under PETG & PCTG filament.

PETG CF or another fibre-reinforced filament?

Filament	Characteristic	Choose it for
PETG + CF	Stiff and dimensionally stable, with a tough PETG base	Brackets, holders and enclosures for everyday use
PCTG + CF / GF	More impact-resistant PCTG base, with carbon or glass fibre	Parts that also have to absorb knocks or vibration
PLA + CF	The easiest to print, but less heat-resistant	Models, moulds and prototypes for indoor use
Nylon + CF / GF	Strong and wear-resistant, but harder to print	Heavily loaded parts

Printing PETG CF: the settings

Nozzle: 250–270 °C.
Print bed: 90–110 °C.
Hardened nozzle: carbon fibre is abrasive and wears a brass nozzle quickly. Use a hardened steel nozzle or another wear-resistant material. A 0.6 mm nozzle reduces the risk of clogging.
Adhesion: print on a textured sheet or use glue stick as a release agent, as with ordinary PETG.
Cooling: moderate; too much cooling weakens the bond between layers.
Diameter: 1.75 mm, with a tolerance of ± 0.02 mm.

Dealing with stringing, clogging or poor adhesion? Solving 3D printing problems covers the causes and fixes.

Pros and cons of PETG CF

Pros

Stiffer and more dimensionally stable than ordinary PETG
Little shrinkage and warping during printing
Matte surface that makes layer lines and small imperfections less noticeable
According to Fiberlogy, more heat-resistant than standard PETG

Cons

Abrasive: a hardened nozzle is needed
Less elongation than ordinary PETG; for parts that need to flex or absorb knocks, PETG or PCTG is better
Only in black
Absorbs moisture, so store it dry

Uses

Functional parts: brackets, holders, frames and enclosures.
Workshop: moulds, jigs and fixtures that need to hold their dimensions.
Hobby: parts for drones, RC models and the car.
Engineering: guides and gears that should flex as little as possible.

Frequently asked questions

What is the difference between PETG and PETG CF?
PETG CF is PETG with carbon fibre. It is stiffer and more dimensionally stable, has a matte surface and prints slightly hotter: 250–270 °C with a bed of 90–110 °C. Ordinary PETG is tougher and more flexible, comes in many colours and prints without a hardened nozzle.
Do I need a hardened nozzle for PETG CF?
Yes. Carbon fibre acts as an abrasive and wears out a brass nozzle in a short time, which enlarges the opening and makes your prints inaccurate. Use a hardened steel nozzle or another wear-resistant material. With 0.6 mm you are less likely to get clogs than with 0.4 mm.
Can I print PETG CF on a Bambu Lab printer with AMS?
Yes. Fiberlogy PETG + CF comes on a spool of 199 mm diameter and 59 mm wide, which fits in the AMS; see also Fiberlogy spools in the AMS. Do check that your printer has a hardened nozzle and set the temperatures yourself: 250–270 °C for the nozzle and 90–110 °C for the bed.
Is PETG CF stronger than ordinary PETG?
PETG CF is above all stiffer: it bends less and holds its dimensions better. On the other hand, it stretches less and breaks sooner than ordinary PETG under a hard knock. If a part needs to be both stiff and impact-resistant, look at PCTG + CF.
PETG CF or PLA CF: which should I choose?
PLA CF is the easiest to print and very stiff, but softens at lower temperatures. PETG CF resists heat, moisture and chemicals better and is tougher. Choose PLA CF for models and prototypes used indoors, and PETG CF for parts used outdoors, in the car or in a warm environment.