Fiberon™ PET-CF17

Engineered for Strength and Precision Fiberon™ PET-CF17 is a carbon fiber reinforced PET (polyethylene terephthalate) filament, specifically designed for engineering-grade 3D printing. With 17% carbon fiber content, it delivers a high modulus for excellent stiffness and dimensional stability, making it ideal for functional prototypes and end-use parts.

Key Performance Features

• High Modulus & Strength: The carbon fiber reinforcement provides outstanding rigidity and mechanical strength, suitable for demanding engineering applications.

• Heat Resistance: Maintains structural integrity at elevated temperatures, making it suitable for parts exposed to heat or requiring thermal stability. Annealing is required for higher heat resistance.

• Moisture Insensitivity: Unlike many engineering filaments, Fiberon™ PET-CF17 is less sensitive to moisture, ensuring consistent print quality and reducing the need for pre-drying.

• Easy to Print: Offers smooth extrusion and reliable bed adhesion, making it accessible to users with standard high-temperature FDM/FFF 3D printers equipped with a hardened nozzle.

Ideal for Engineering Applications Perfect for automotive, aerospace, robotics, and industrial parts where strength, durability, and precision are essential.

Choose Fiberon™ PET-CF17 for your engineering projects when you need a composite material that combines high strength, heat resistance, moisture insensitivity, and reliable, easy printing.

Printing Recommendations

Nozzle temperature	270 - 300°C
Build plate temperature	70 - 80°C
Environmental temperature	Room Temperature
Fan speed	0%
Printing speed	30 - 300 mm/s

Printing Tips

The only requirements you need to print this material is an all-metal hotend that can reach 270˚C - 300˚C, and a hardened nozzle due to the abrasiveness.

• Print a bit slower if experiencing any layer adhesion issues.

• Keep cooling fan off.

• Keep door open if printing in enclosed printer - enclosure is not needed.

• Anneal the print at 120˚ for 10h for the best layer adhesion and temperature resistance.

FAQ

What is annealing?

You can find out more about annealing HERE.

Do I have to anneal my PET-CF17?

Annealing significantly improves the heat resistance of PET-CF17, raising its heat deflection temperature (HDT) from around 70°C to over 100°C. However, in terms of mechanical properties, annealing mainly increases the stiffness (modulus) of the material but does not enhance impact resistance or layer adhesion. This means the material does not become tougher after annealing.

Annealing at 120°C is deforming my part, what should I do?

If your part has very thin sections - 120°C annealing can cause issue with deformation. In this instance we would give these three potential solutions

1. Gradual heating method. Divide the annealing process into two stages, first keep the temperature at 80-100°C for a period of time, and then slowly heat it to 120°C to avoid rapid heating and internal stress concentration.​

2. Anneal at a lower 100°C for a longer period of time. If annealing is performed at 80-100 degrees, the crystallization rate of PET-CF is very slow and the ideal mechanical properties cannot be achieved. 100°C would be the bare minimum to anneal PET-CF at. Our suggestion would be to try 14 hours though we do not have a strict standard for this at this time.

3. Keep support material on thin sections with large overhangs. You can also use other things such as salt or sand to tightly compact around your print to help prevent deformation.

Will the spools work in an AMS?

Yes -we definitely recommend printing with a hotend that can reach at least 310˚C. It might beWhile the spools will roll fine in the AMS, PPS-CF is very brittle on the spool meaning that if it goes through too tight of twists or turns - it may snap. We recommend not using an AMS and having a direct path to the printer.

What is the difference between PET and PETG?

PET and PETG differ in their chemical structure, properties, printability, and applications. PETG is more flexible, easier to print, and suitable for 3D printing and medical applications, while PET is more durable and suitable for applications requiring thermal resistance.

Do I need a filament dryer?

It is possible to print this without a filament dryer, but that can depend on the environment where you live. If you live in a humid climate - you may need a filament dryer either entire time while printing, or at least between prints. Keep stored dry.

Can HT-PLA be used as breakaway support material for PET-CF?

Yes! HT-PLA has been tested by the community and it does work as great support material for PET-CF.

Can you make Fiberon spools in 1KG?

Unfortunately we are not offering 1KG Fiberon™ options and this has to do with the increased chance of carbon fiber and glass fiber filament snapping on the spool.

Since carbon fiber and glass fiber filament is more brittle, we spool these with a larger core. This larger core means that 1KG of filament will not fit on a 1KG spool. 3KG options of all Fiberon™ spools are available though.

Printing Requirements

• All-metal hotend 270˚C+

• Hardened nozzle

• Annealing post printing

• You may need a filament dryer depending on the humidity of your environment. Keep dry when not in use.

Printing Profiles

Documents

TDS

SDS

Other Docs