Fiberon™ PET-GF15 1.75mm 3D Printer Filament

Fiberon™ PET-GF15 combines PET with 15% glass fiber reinforcement to deliver a strong, rigid, and dimensionally stable engineering material that remains relatively easy to print. It bridges the gap between everyday usability and industrial performance, making it an excellent choice for functional parts that require more stiffness and thermal resistance than standard PETG.

With a bending strength of up to 104.2 MPa and a bending modulus of 3705 MPa in the XY direction, PET-GF15 provides excellent rigidity for structural and mechanical components. Its glass fiber reinforcement also helps minimize warping and maintain dimensional accuracy on larger parts.

PET-GF15 offers a refined surface finish with less visible fiber exposure than many carbon-fiber- and glass-fiber-reinforced materials. It is also compatible with Bambu AMS and other multi-material systems, providing greater flexibility for automated and multi-color workflows.

For applications requiring elevated temperature resistance, PET-GF15 can be annealed at 120°C for 16 hours. After annealing, Polymaker specifies HDT up to 133°C at 0.45 MPa and dimensional change below 0.5%.

Key Benefits

• 15% glass fiber reinforcement for increased strength and stiffness
• Excellent heat resistance for demanding functional applications
• High dimensional stability and low warping
• Smooth, professional surface finish with reduced fiber exposure
• High bending strength and rigidity
• Easy to print compared with many high-temperature engineering materials
• Print speeds up to 250 mm/s
• AMS and multi-material system compatible
• Available in six colors
• Recyclable cardboard spool and packaging

Typical Applications

• Functional prototypes
• Industrial jigs and fixtures
• Automotive components
• Brackets and structural supports
• Protective housings and enclosures
• Replacement mechanical parts
• Shop and manufacturing fixtures
• Marine components
• High-temperature functional parts
• Large dimensional prototypes

Fiberon™ PET-GF15 is particularly well suited for applications requiring a combination of rigidity, dimensional stability, heat resistance, and practical printability without moving into more demanding high-temperature materials.

Specifications

Material: PET with 15% Glass Fiber

Filament Diameter: 1.75mm

Available Weights: 1kg, 3kg

Available Colors: Black, Dark Grey, Light Grey, White, Blue, Red

Nozzle Temperature: 280–310°C

Build Plate Temperature: 70–80°C

Maximum Print Speed: Up to 250 mm/s

Cooling Fan: OFF

Enclosure: Recommended

Nozzle: 0.4mm or larger hardened nozzle required

Drying: 100°C for 10 hours if moisture has been absorbed

Annealing: 120°C for 16 hours when maximum heat resistance and mechanical performance are required

Mechanical Properties

• Tensile Strength XY: 59.9 MPa
• Tensile Strength Z: 48.2 MPa
• Elongation at Break XY: 4.0%
• Elongation at Break Z: 2.6%
• Bending Strength XY: 104.2 MPa
• Bending Strength Z: 80.3 MPa
• Bending Modulus XY: 3705.4 MPa
• Bending Modulus Z: 2998.4 MPa
• Young's Modulus XY: 4144.2 MPa
• Young's Modulus Z: 3428.9 MPa
• Charpy Unnotched XY: 27.2 kJ/m²
• Charpy Unnotched Z: 13.9 kJ/m²
• Charpy Notched XY: 8.7 kJ/m²

Thermal Properties

• Melting Temperature: 231.6°C
• Glass Transition Temperature (Tg): 59.5°C
• Vicat Softening Temperature: 232.6°C
• HDT @ 0.45 MPa: Up to 133°C after annealing

Recommended Print Settings

• Nozzle: 280–310°C
• Build Plate: 70–80°C
• Print Speed: Up to 250 mm/s
• Cooling Fan: OFF
• Direct Drive Retraction: 1mm @ 20 mm/s
• Indirect Drive Retraction: 3mm @ 40 mm/s
• Drying: 100°C for 10 hours when required
• Nozzle: Hardened steel or ruby, 0.4mm or larger
• Enclosure: Recommended

Because PET-GF15 contains 15% glass fiber, a hardened wear-resistant nozzle is required. Polymaker notes that standard brass nozzles can wear rapidly, with brass-nozzle life potentially around 9 hours.

PET-GF15 is also moisture-sensitive and should be stored and printed under dry conditions, ideally below 20% relative humidity. When printing on textured PEI, use a suitable release layer and allow the build plate to cool completely before removing parts.

Additional Information

Annealing is not required for general-purpose applications, but it is recommended when parts need improved high-temperature performance and maximum mechanical properties. Anneal at 120°C for 16 hours while avoiding applied loads and uneven oven temperatures. Supports may be retained during annealing where necessary to help control deformation.

Fiberon™ PET-GF15 is AMS-compatible and can be used with Bambu AMS and other multi-material systems. Its combination of strength, stiffness, dimensional stability, and relatively easy processing makes it an excellent engineering filament for both professional and advanced desktop 3D printing.

Note: Material shipment times are subject to Polymaker warehouse stock and production times.