Sunlu PLA+ Filament (Black) — Sunlu PLA+ B, 1.75 mm, 1 kg spool, PLA+ 3D printing filament

Sunlu PLA+ Filament (Black) is a 1.75 mm, 1 kg spool of PLA+ 3D printing material designed for general-purpose FDM/FFF printers. The filament targets users who need a balance of aesthetic surface finish and improved mechanical performance compared to standard PLA, delivering higher impact resistance and stable feeding for consistent prints.

Advantages

Sunlu PLA+ offers increased toughness and reduced brittleness compared with ordinary PLA, with improved impact resistance and strong interlayer adhesion. The filament is manufactured to tight diameter tolerances and low shrinkage for stable extrusion, and it is wound evenly on the spool to minimise tangles and feeding issues. These properties contribute to reliable printing, good surface quality and fewer common print problems such as warping or excessive stringing.

Suitable for

• Prototypes and functional parts requiring better durability than standard PLA
• Decorative prints and models where surface finish and colour depth are important
• Everyday FDM/FFF printing on 1.75 mm systems (hobby and professional use)

When it may not be suitable

This PLA+ is not intended for high-temperature applications that require long-term thermal resistance above its Vicat and heat deflection range. It is also not suitable where flexible or rubber-like properties are needed, since PLA+ remains a relatively rigid thermoplastic. For applications demanding extreme elongation or continuous exposure to temperatures above its softening point, alternative materials should be considered.

Key specifications

• Diameter: 1.75 mm (nominal)
• Spool weight: 1 kg
• Density: 1.23 g/cm³
• Recommended print temperature: 195–220 °C (dependent on speed and printer)
• Recommended print speed: 50–100 mm/s at 195–205 °C or 100–300 mm/s at 205–220 °C
• Vicat softening temperature: 54 °C
• Heat deflection temperature: 53 °C
• Melting temperature: 164 °C
• Melt flow rate: 6.3 g/10 min
• Tensile strength: 64 MPa
• Elongation at break: 17 %
• Flexural strength: 86 MPa
• Flexural modulus: 2907 MPa
• IZOD impact strength (X-Y): 3.5 kJ/m²; overall impact resistance noted up to ~8 kJ/m² in specific tests

How to use

Load the 1.75 mm Sunlu PLA+ filament into any compatible FDM/FFF printer and set the nozzle temperature according to the recommended range for your printing speed and model complexity. Use a heated bed if available or apply appropriate adhesion aid; typical bed temperatures are low for PLA but follow your printer and model needs. Adjust retraction, cooling and print speed to reduce stringing and ensure good layer bonding. Allow printed parts to cool before removing them from the build plate to avoid deformation.

What to consider before purchase

• Ensure your printer supports 1.75 mm filament
• Confirm the recommended temperature range matches your printer’s capabilities
• Consider the part’s thermal requirements given the filament’s Vicat and HDT values

Usage recommendations

For reliable results with Sunlu PLA+ Filament (Black), start printing at 200 °C and 60–80 mm/s, enable active part cooling, and fine-tune retraction settings to your hotend to minimise stringing. Use a well-leveled bed and appropriate adhesion (glue stick, blue tape or PEI) for best first-layer results.