FilamentSUNLU
SUNLU PP (Polypropylene) — Lightweight, Chemical-Resistant Filament
PP · Standard
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Specifications
Nozzle temperature210–230 °C
Bed temperature85–100 °C
Print speed40–50 mm/s
EnclosureYes
All-metal hotendYes
Drying before printingYes
Density0.9 g/cm³
Description
SUNLU PP is a polypropylene filament for functional parts that need low weight, flexibility, and chemical resistance. With a density of about 0.9 g/cm³ (versus roughly 1.23 g/cm³ for PLA), printed parts come out about 27% lighter. It's food-contact compliant, so it suits containers, kitchen tools, and storage boxes.
Print Settings
- Nozzle temperature: 210–230 °C
- Bed temperature: 85–100 °C
- Print speed: 30–50 mm/s
- Part cooling fan: 10% (low, to keep parts from warping)
- 1.75 mm diameter, 0.8 kg spool, Natural color
Polypropylene is fussy about adhesion. Print in an enclosure, use a PP-specific build surface plus PP glue, and add a skirt around the model. To avoid warping from crystallization, skip dense rectangular infill patterns.
This line is a good fit for durable, fatigue-resistant parts that take repeated stress: living hinges, brackets, packaging, and containers exposed to harsh chemicals. Run it on a printer with an enclosure, a heated bed, and an all-metal hotend.
FAQ
Yes. Polypropylene warps badly. Print in an enclosure, with a low part-cooling fan (around 10%) and a skirt around the model.