Siraya Tech Fibreheart PET-CF TDS
1. PRODUCT INTRODUCTION
- Enhanced Performance & Reliability: Expertly blending PET with carbon fiber for increased strength and stiffness.
- Smart Fiber Reinforced Technology: 15% Carbon fibers form a mesh structure, enhancing mechanical properties and dimensional stability.
- Superior Dimensional Stability: Reduced warping and shrinkage, maintaining precise dimensions and shapes.
- Lightweight Durability: Balancing strength with a lightweight profile, ideal for durable yet lightweight components.

2. APPLICATIONS
- Automotive industry, drones, Industrial machinery, Architecture and construction: hoods, door panels, drones, robot parts, frames of precision instruments, etc.
- Sports equipment: bicycle frames, golf clubs, tennis rackets, snowboards, etc.
- Consumer electronics: Electronic product casing, providing a lightweight and strong protective structure.
Find more PET-CF details here

3. Property Data
|
Mechanical Properties |
Unannealed |
Annealed |
Method |
|
Tensile Stress at Break X-Y |
74 MPa |
73 MPa |
ASTM D638 |
|
Tensile Stress at Break Z |
35 MPa |
- |
ASTM D638 |
|
Young’s Modulus X-Y |
5950 MPa |
6700 MPa |
ASTM D638 |
|
Young’s Modulus Z |
3400 MPa |
- |
ASTM D638 |
|
Elongation at Break X-Y |
2.5 % |
1.5 % |
ASTM D638 |
|
Elongation at Break Z |
1.15 % |
- |
ASTM D638 |
|
Charpy impact strength (KJ/m^2) |
9 |
4.8 |
ISO 179 |
|
Bending Strength (MPa) |
116 |
115 |
ISO 178 |
|
Bending Modulus (MPa) |
5600 |
5900 |
ISO 178 |
|
Other Properties |
Unannealed |
Annealed |
Method |
|
Vicat softening temperature ℃ |
220 |
- |
ISO 306 |
|
Glass Transition Temperature |
80 |
- |
ASTM D3418 |
|
IZOD Impact (Notched 72F) kJ/m |
36 |
- |
ASTM D256 |
|
HDT @ 1.80 MPa (℃) |
76.6 |
118 |
Method A |
|
HDT @ 0.45 MPa ℃ |
86.7 |
176 |
Method B |
|
Melting Point (C) |
250 |
/ |
ASTM D3418 |
|
Water Absorption Rate (%) |
0.5 |
0.5 |
ISO 62 |
|
Specification |
Data |
|
Name |
PET-CF |
|
Material |
Polyethylene terephthalate + 15% carbon fiber |
|
Version |
1KG / 2.5KG |
|
Net Weight KG |
1/2.5 |
|
Color |
Black |
|
SKU |
ST3003/ST3203 |
|
Filament Density g/cm³ |
1.3 |
|
Diameter |
1.75±0.02 mm |
4. Preparing for Printing
Drying: PET materials are sensitive to moisture, which can affect the performance during printing and the quality of the final product. Ensure the material is dried.
Siraya Tech PET-CF (and all of our filaments) are dried before being sealed in an aluminum bag, which protects them from moisture for up to 3 years. It can be used directly without drying. It's recommended to dry at 90°C for 4-6 hours. Only dry if filament shows signs of moisture.
Bed Temperature: Recommended bed temperatures range from 70°C to 90°C to
help the first layer adhere better.
First Layer Settings: The first layer is critical for a successful print. Ensure the bed is level and the first layer print speed is slightly reduced to enhance adhesion.
5. Print setting for Fibreheart PET-CF
| Nozzle Temperature | 280-320°C |
| Recommended Nozzle Diameter | 0.4-1.0mm (hardened steel or higher grade) |
| Recommended Build Surface | PEI or coat with PVP glue stick |
| Build Plate Temperature | 60-80°C |
| Raft Separation Distance | 0.08-0.12mm |
| Cooling Fan Speed | Off |
| Print Speed | 30-120mm/s |
| Max Extrusion Volumetric Speed |
20mm³/s at 320°C |
| Retraction Distance | 1-3mm |
| Retraction Speed | 1800-3600mm/min |
6. Moisture Management
Sealed Packaging: When not in use, store PET material in a sealed aluminum foil bag to prevent moisture ingress.
Use Desiccants: Include desiccants during storage to absorb any potential moisture, keeping the material dry.
Avoid Direct Sunlight and High Temperatures: Store PET materials in an environment that avoids direct sunlight and high temperatures to prevent material degradation.
Temperature Control: It's best to store PET materials at room temperature; both overheating and excessive cooling can affect the printing performance and quality of the material.
7. Troubleshooting Common Issues
Stringing: If you notice stringing between parts of your print, reduce the printing temperature by 5-10 degrees. Also, adjust the retraction settings—increase retraction distance and speed to pull the filament effectively away from the nozzle during travel moves.
Moisture Problems: If the filament has absorbed moisture, which can cause popping sounds and poor surface quality, dry the filament. Use an oven set at 100-120°C for 4-6 hours. Store the filament in a sealed bag with desiccants to prevent reabsorption of moisture.
8. Annealing
Siraya Tech PET-CF is a robust engineering filament that can be used right off the
spool without annealing.
However, if you need to enhance its hardness, consider annealing it at 90-100°C for 4-6 hours. Be mindful of potential shrinkage during the annealing process.
Download Fibreheart PET-CF TDS in PDF version
