Sunlu PLA+ Filament Sunny Orange — Sunlu PLA+ SO 1.75 mm (color: Sunny Orange)

Sunlu PLA+ Filament Sunny Orange is a PLA+ material formulated for desktop FDM 3D printers using 1.75 mm filament. It delivers improved toughness compared with standard PLA while retaining good printability and vivid color, making it suitable for both aesthetic models and more durable functional parts.

Advantages

The filament offers enhanced mechanical properties, including higher impact resistance than many standard PLA variants, along with low shrinkage and good interlayer adhesion for consistent, accurate prints. It is manufactured with tight dimensional tolerance and even winding on the spool to reduce feeding issues and minimize typical printing problems such as nozzle clogging, tangling, or excessive stringing.

Suitable for

• Prototypes and concept models that require a pleasing surface finish
• Decorative parts and display models with vivid Sunny Orange color
• Functional parts and housings that benefit from improved impact resistance
• Hobbyist and educational printing projects on common 1.75 mm FDM printers

When it may not be suitable

This PLA+ filament has a moderate heat resistance with a Vicat softening temperature around 54 °C and heat deflection near 53 °C, so it may deform under prolonged exposure to higher temperatures or direct sunlight. For high-temperature applications or parts that must withstand sustained mechanical loads at elevated temperatures, consider engineering plastics with higher heat resistance.

Key specifications

• Material: PLA+ (polylactic acid enhanced)
• Diameter: 1.75 mm with dimensional accuracy ±0.02 mm
• Density: 1.23 g/cm³
• Recommended print temperature range: 195–220 °C (adjust by speed)
• Recommended print speed: 50–100 mm/s (or up to 300 mm/s with higher temperatures)
• Vicat softening temperature: 54 °C
• Heat deflection temperature: 53 °C
• Melting point: 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 (with notch, X-Y): 3.5 kJ/m²; reported impact resistance up to 8 kJ/m² in some tests

How to use

Load the 1.75 mm Sunlu PLA+ filament into any compatible FDM printer and set the nozzle temperature within the recommended range depending on chosen print speed: typically 195–205 °C for 50–100 mm/s or 205–220 °C for faster speeds. Use a heated bed if available or a glue/adhesive surface to improve first-layer adhesion; bed temperatures are commonly set low for PLA. Enable standard cooling fans for good surface quality and adjust retraction settings to reduce stringing. Store the filament in a dry place or sealed with desiccant to prevent moisture absorption.

What to consider before purchase

• Printer compatibility with 1.75 mm filament and ability to reach recommended nozzle temperatures
• Intended operating temperature of printed parts (Vicat ~54 °C, HDT ~53 °C)
• Need for improved impact resistance compared with standard PLA
• Storage conditions to avoid moisture-related print issues

Usage recommendations

For reliable results, start with mid-range printing settings (around 200 °C and 60 mm/s), enable part cooling, and fine-tune retraction. Use the even-wound spool to maintain smooth feeding during longer prints and keep the filament sealed with desiccant when not in use.