Sunlu PP Filament Natural White — Polypropylene 0.8 kg spool for FDM/FFF 3D printers

Sunlu PP Filament Natural White is a polypropylene filament on a 0.8 kg spool formulated for FDM/FFF 3D printers. It combines low density (approx. 0.9 g/cm³) with high impact resistance and extreme elongation, enabling the production of lightweight, durable and flexible functional parts. The material is food-contact safe and offers stable print behaviour with a filament diameter tolerance of 1.75 ±0.03 mm and an approximate length of 385 m.

Advantages

Sunlu PP provides a notable weight reduction compared to PLA, allowing for lighter prints while maintaining strength and flexibility. It offers high chemical resistance to acids, bases and many solvents, good fatigue resistance under repeated bending, and food-contact compliance for a range of everyday applications. Stable dimensional properties and consistent filament diameter contribute to repeatable print quality.

Suitable for

• Functional parts and mechanical components requiring flexibility and impact resistance
• Snap-fit connectors, hinges and living hinges
• Containers, kitchen tools and other items intended for food contact
• Prototypes and lightweight structural parts where material savings are important

When it may not be suitable

PP can be more difficult to adhere to common print beds and may require specific build-surface preparation or adhesion aids; users may experience warping on large flat areas without appropriate settings. Also, Sunlu PP has a moderate heat deflection temperature (around 61°C), so it is not suited for applications that must withstand sustained temperatures significantly above this value.

Key specifications

• Material: Polypropylene (PP)
• Colour: Natural white
• Filament diameter: 1.75 mm (±0.03 mm)
• Spool weight: 0.8 kg
• Approximate filament length: 385 m
• Density: 0.9 g/cm³
• Nozzle (print) temperature: 210–230°C
• Heated bed temperature: 50–60°C
• Recommended print speed: 50–150 mm/s
• Tensile strength: 22.7 MPa
• Flexural strength: 24 MPa
• Elongation at break: 900%
• Impact resistance (X–Y): 40 kJ/m²
• Heat deflection temperature: 61°C
• Melting point: 156°C
• Melt flow index (MFI): 9 g/10 min
• Chemical resistance: high resistance to acids, bases and solvents
• Food contact: compliant

How to use

Load the 1.75 mm Sunlu PP filament into an FDM/FFF printer capable of reaching the recommended nozzle temperature. Use a nozzle temperature between 210 and 230°C and a heated bed set to 50–60°C. Adjust print speed within 50–150 mm/s according to part geometry and printer capability. Prepare the build surface or use an adhesion aid suitable for polypropylene to reduce warping and improve first-layer adhesion. Allow printed parts to cool gradually and, where needed, post-process by trimming or annealing according to application requirements.

What to consider before purchase

• Ensure your printer can reach and maintain the recommended nozzle and bed temperatures
• Be prepared to use PP-specific bed preparation or adhesion methods to prevent poor first-layer adhesion and warping
• Consider the material's heat deflection temperature (around 61°C) when selecting for high-temperature applications
• Verify that 1.75 mm filament diameter is compatible with your extruder

Usage recommendations

For best results, print with a well-calibrated extruder, use a dedicated PP-friendly build surface or adhesive, tune cooling and speed for part geometry, and test small samples to find optimal settings before large prints.