Siraya Tech Fibreheart PET-GF Filament User Manual
Introduction to Fibreheart PET-GF Filament
Siraya Tech Fibreheart PET-GF is a chopped glass fiber reinforced polyethylene terephthalate (PET) filament specially developed for FDM 3D printing. It features low moisture absorption, high strength, creep resistance, and high heat resistance.
Key Advantages:
- Uses Siraya Tech's proprietary fiber reinforcement technology to control fiber dispersion, forming a mesh structure that improves mechanical properties, heat resistance, and part dimensional stability with no warping.
- PET's regular molecular structure and rigid benzene rings provide low creep and better mechanical properties compared to PA and PC.
- Good dimensional stability during printing with no warping, shrinkage, or odor.
- Can be annealed to reach even higher HDT.
Recommended Printing Conditions
| Nozzle Temperature | 300℃ |
| Recommended Nozzle Diameter | 0.4-1.0mm |
| Recommended Nozzle Material | hardened steel or higher grade |
| Recommended Build Surface | PEI or coat with PVP glue stick |
| Build Plate Temperature | 80°C |
| Raft Separation Distance | 0.08-0.12mm |
| Cooling Fan Speed | OFF |
| Print Speed | 30-120mm/s |
| Max Extrusion Volumetric Speed | 20mm/s at 320°C |
| Retraction Distance | 1-3mm |
| Retraction Speed | 1800-3600mm/min |
Material Properties
| Density | 1.37 g/cm3 | |
| Melting Temperature | 250°C | |
| Heat Deflection Temperature (Unannealed) | 75°C/80°C | ISO 75 Method A/Method B |
| Heat Deflection Temperature (Annealed) | 100°C/120°C | ISO 75 Method A/Method B |
| Water Absorption | 0.5% | ISO 62 Method 1 |
Annealing Process
Annealing can help PET-GF filament to increase HDT and hardness. It is not a required step and should only be done as needed.
- To anneal parts made with PET-GF, please place the part in an oven or food dehydrator at 95°C for 4 hours.
- To help with even heat transfer and maintain consistency, submerge the part in white alumina sand for best results.
Storage and Handling
Although PET-GF has very low moisture absorption, it is still sensitive to humidity. If the material absorbs moisture, print quality will degrade (oozing, bubbles, rough surface).
- Store unused Siraya Tech Fibreheart filament in sealed packaging with desiccant.
- Dry filament at 100-120°C for 4-6 hours to restore print quality only if the filament is showing signs of moisture absorption (poor printing surface).
- Do not dry the filament right after opening the packaging, as Siraya Tech dries all their filaments. Overdrying a dried filament can trigger the annealing process and make the filament unprintable.
Let us know if you have any other questions! The Siraya Tech team is always happy to help you get the best performance out of Fibreheart PET-GF filament.