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Polymaker Fiberon™️ PET-GF15
Fiberon™ PET-GF15 – Glass Fiber Reinforced PET Filament
The bridge between everyday use and industrial performance.
High-strength, heat-resistant engineering filament
Fiberon™ PET-GF15 combines PET with 15% glass fiber reinforcement to deliver outstanding stiffness, dimensional stability, and heat resistance. It is developed for users who need the robustness of an engineering filament without compromising printability.
Industrial-level performance – user-friendly for everyday use
With a flexural strength of 104 MPa and an HDT of up to 133 °C (0.45 MPa, after annealing/heat treatment), PET-GF15 can withstand high loads and high temperatures where other materials would deform. It prints easily on most modern FDM printers – even at speeds up to 250 mm/s.
Excellent surface finish & AMS-compatible
Achieve smooth, professional-quality prints with a refined surface texture that minimizes visible layer lines. Available in six bright colors. Fiberon™ PET-GF15 works seamlessly with most multi-material systems and is ideal for multi-color and multi-material projects.
Dimensional stability & minimal warping
PET-GF15 maintains high precision and minimal warping – even for larger prints. After annealing, dimensional change remains below 0.5%, ensuring tight tolerances for functional parts where reliability and precision are critical.
Designed for professionals and makers alike
Ideal for automotive parts, jigs, fixtures, industrial components, and prototypes. PET-GF15 offers excellent toughness and resistance to brittleness. Whether you are a professional engineer or an experienced hobbyist, PET-GF15 delivers industrial results with a user-friendly experience.
Warning: PET-GF filament binds strongly to textured PEI build plates – allow the plate to cool completely before removing the part, or use a release agent to avoid damage.
Print requirements
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Hardened nozzle
Download product information
Mechanical properties
| Property | Value |
|---|---|
| Charpy impact strength – notched (XY) | 8.7 kJ/m² |
| Charpy impact strength – unnotched (Z) | 13.9 kJ/m² |
| Charpy impact strength – unnotched (XY) | 27.2 kJ/m² |
| Flexural modulus (XY) | 3705.4 MPa |
| Flexural modulus (Z) | 2998.4 MPa |
| Flexural strength (XY) | 104.2 MPa |
| Flexural strength (Z) | 80.3 MPa |
| Elongation at break (XY) | 4.0 % |
| Elongation at break (Z) | 2.6 % |
| Young's modulus (XY) | 4144.2 MPa |
| Young's modulus (Z) | 3428.9 MPa |
| Tensile strength (XY) | 59.9 MPa |
| Tensile strength (Z) | 48.2 MPa |
Thermal properties
| Property | Value |
|---|---|
| Crystallization temperature | 201.4 °C |
| Decomposition temperature | 422.8 °C |
| Glass transition temperature (Tg) | 59.5 °C |
| Melting temperature | 231.6 °C |
| Vicat softening temperature | 232.6 °C |
| HDT @ 0.45 MPa (annealed) | 133.7 °C |
| HDT @ 1.8 MPa (annealed) | 87.3 °C |