Materials › PET-CF / PET-GF
PET-CF / PET-GF – Properties, Temperatures & Tips
All key properties, print settings, pros and cons and matching filaments at a glance.
Properties & print settings
- Nozzle (°C)
- 260–300
- Bed (°C)
- 70–100
- Heat resistance HDT (°C)
- approx. 148–205 (CF); up to approx. 238 annealed (Polymaker)
- Tensile strength (MPa)
- approx. 60–66; flexural strength 131 (Bambu PET-CF)
- Density (g/cm³)
- approx. 1.34–1.43
- Drying
- 80 °C, 8–12 h
- Difficulty
- demanding
Enclosed chamber required Hardened nozzle required
What is PET-CF / PET-GF used for?
Heat and dimensionally stable technical parts, less moisture-sensitive than nylon
+ Pros
Very stiff and heat resistant, dimensionally stable
– Cons
Hardened nozzle, high temperatures, enclosure, drying
Printing tips at a glance
- Nozzle temperature: 260–300 °C – start in the middle of the range on a new spool and fine-tune with a temperature tower.
- Bed temperature: 70–100 °C.
- An enclosed chamber is strongly recommended, otherwise expect warping and layer cracks.
- Because of the abrasive filler a hardened nozzle (e.g. hardened steel) is a must – brass wears out quickly.
- Drying: 80 °C, 8–12 h. Wet filament shows up as crackling, stringing and rough surfaces.
Compare similar materials
| Material | Difficulty | Nozzle (°C) | Bed (°C) | Heat resistance HDT (°C) | Tensile strength (MPa) |
|---|---|---|---|---|---|
| PET-CF / PET-GF | 4/5 | 260–300 | 70–100 | approx. 148–205 (CF); up to approx. 238 annealed (Polymaker) | approx. 60–66; flexural strength 131 (Bambu PET-CF) |
| PA-CF (carbon fibre nylon: PA6-CF, PAHT-CF, PA11-CF) | 4/5 | 260–300 | 100–120 | approx. 175–215 (Polymaker, annealed); 184–194 (Bambu) | approx. 92–109 (Polymaker); flexural strength 125–151 (Bambu) |
| PETG-CF (carbon fibre PETG) | 2/5 | 240–270 | 60–80 | 69–74 | approx. 60 (Polymaker); flexural strength 70 (Bambu) |
| PC (polycarbonate) | 4/5 | 260–290 | 100–120 | 111–117 | 53–69 |
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Frequently asked questions
What nozzle temperature does PET-CF / PET-GF need?
Guideline for PET-CF / PET-GF: 260–300 °C nozzle and 70–100 °C bed temperature. The exact values are printed on the manufacturer's spool.
How heat resistant is PET-CF / PET-GF?
Heat deflection temperature (HDT) is around approx. 148–205 (CF); up to approx. 238 annealed (Polymaker) °C. Above that, loaded parts start to deform.
Does PET-CF / PET-GF need to be dried?
Recommended: 80 °C, 8–12 h.
Do I need an enclosure for PET-CF / PET-GF?
An enclosed chamber is strongly recommended, otherwise expect warping and layer cracks. Because of the abrasive filler a hardened nozzle (e.g. hardened steel) is a must – brass wears out quickly.
Values are guidelines from manufacturer datasheets (Polymaker, Bambu Lab, Prusa). They may differ by manufacturer, colour and print settings.