3D printer filament POLYMAKER PET-GF15 1.75 mm, glass-fiber reinforced PET-G, 0.5 kg, red

POLYMAKER PET-GF15 1.75 mm is a glass-fiber reinforced PET-G filament supplied on a 0.5 kg spool in red, intended for FDM/FFF 3D printers. The addition of 15% glass fiber increases stiffness, dimensional stability and heat resistance compared with standard PET-G while retaining good printability. This material is formulated for users who need stronger, more stable parts for functional prototypes, mechanical components and selective end-use applications where improved mechanical properties are required.

Advantages

The 15% glass-fiber reinforcement provides higher flexural strength and improved rigidity without a large compromise in processability. PET-G base material offers good layer adhesion and reduced warping compared with some engineering plastics, while the glass fibers increase heat resistance and dimensional stability during and after printing. The filament delivers consistent diameter and feed behavior suitable for standard direct-drive and Bowden extruders when using an appropriate hardened nozzle and print parameters tuned for abrasive-filled materials.

Suitable for

• Functional prototypes that require higher stiffness and thermal resistance
• Mechanical parts such as brackets, housings and structural connectors
• End-use components exposed to moderate mechanical loads and elevated temperatures
• Applications needing stable dimensional accuracy over time

Key specifications

• Material type: PET-G reinforced with 15% glass fiber
• Diameter: 1.75 mm
• Spool weight: 0.5 kg
• Color: red
• Compatibility: FDM/FFF 3D printers
• Properties: increased stiffness, improved dimensional stability, enhanced heat resistance

How to use

Load the 1.75 mm filament into a 3D printer configured for abrasive or fiber-filled materials. Use a hardened steel or similarly wear-resistant nozzle to avoid accelerated wear from glass fibers. Recommended print temperatures are typically higher than unfilled PET-G; start with the manufacturer’s suggested range for PET-G blends and adjust incrementally for layer adhesion and surface finish. Moderate bed heating and good part cooling balance can help control warping and surface quality. Monitor extrusion and retraction settings to reduce stringing and ensure dimensional accuracy.

Usage recommendations

For best results, use a hardened nozzle (0.4 mm or larger) and ensure proper ventilation when printing. Calibrate extrusion multiplier and printing temperature on test prints before producing critical parts. Avoid excessive flexible motion in printed designs where fibers could cause brittleness; consider reinforcing geometry rather than relying on thin walls.