3D printer filament Sunlu PETG Filament (Black) - PETG material, for FDM/FFF printers, 1.75 mm

Sunlu PETG Filament (Black) is a 1.75 mm PETG spool formulated for FDM/FFF 3D printers. The material offers good interlayer adhesion and reduced warping, producing consistent, structurally sound prints suitable for functional parts, prototypes and items that require durability and moderate flexibility. It combines chemical resistance and impact resilience, making it useful for both indoor components and parts exposed to more demanding conditions.

Advantages

Sunlu PETG delivers strong interlayer bonding, high impact resistance and long-term dimensional stability. Prints resist warping and maintain mechanical properties over time, so finished models remain usable in applications that need both strength and visual quality. The filament’s balance of toughness and moderate flexibility makes it versatile for a range of uses.

Suitable for

• Functional prototypes and end-use parts
• Enclosures, brackets and mechanical components
• Indoor fixtures and certain outdoor parts exposed to weather
• Prints requiring impact resistance and low warping

When it may not be suitable

PETG is less rigid than some engineering plastics and not as heat-resistant as high-temperature filaments like polycarbonate or certain nylons; it may soften near its Vicat temperature and is not suitable for applications requiring very high continuous operating temperatures. Very fine aesthetic details or mirror-smooth finishes can be harder to achieve compared with PLA or resin prints without post-processing.

Key specifications

• Material: PETG
• Diameter: 1.75 mm
• Color: Black
• Density: 1.27 g/cm³
• Vicat softening temperature: 68 °C
• Heat deflection temperature: 68 °C
• Melting temperature: 195 °C
• Melt flow rate: 5.3 g/10 min
• Tensile strength: 53 MPa
• Elongation at break: 17.3%
• Flexural strength: 77 MPa
• Flexural modulus: 2226 MPa
• Impact strength: 2.7 kJ/m

How to use

Load the 1.75 mm Sunlu PETG filament onto an FDM/FFF printer and set printing temperatures according to your printer and hotend capabilities, starting around the filament’s melting point and adjusting as needed for layer adhesion and surface finish. Use a heated bed and appropriate bed adhesion method to reduce warping; enable cooling moderately to balance surface detail and interlayer bonding. Calibrate extrusion multiplier and retraction settings to prevent stringing while preserving layer strength.

What to consider before purchase

• Ensure your printer supports 1.75 mm filament and can reach recommended nozzle and bed temperatures.
• Consider part requirements for heat resistance; PETG has a Vicat/deflection temperature around 68 °C.
• Check compatibility of bed adhesion method (heated bed, adhesive, PEI, etc.).
• Verify the need for impact resistance and flexibility versus stiffer materials.

Usage recommendations

For reliable results with Sunlu PETG Filament (Black): print at stable temperatures, use a heated bed with good adhesion, moderate part cooling, and fine-tune extrusion and retraction to balance surface quality and mechanical strength.