Polypropylene vs ASA
Compare Polypropylene and ASA filaments side-by-side so you can pick the right one for your 3D printing project.
Polypropylene vs ASA: Polypropylene is known for can bend without damage, while ASA is known for excellent uv resistance (outdoors indefinitely). Both have recommended enclosure requirements; Polypropylene is less moisture-sensitive; ASA prints at higher nozzle temperatures (220-275°C vs 220-250°C). Choose Polypropylene for can bend without damage, or ASA for excellent uv resistance (outdoors indefinitely).
Key differences at a glance
Polypropylene
FPP
Can bend without damage; very rugged; strong layer adhesion; very low density
ASA
AAcrylonitrile Styrene Acrylate
Excellent UV resistance (outdoors indefinitely), tough, matte surface
Detailed Comparison
Green marks the generally easier or more forgiving option in that row, based on tier, enclosure needs, and moisture sensitivity. It is not always the better choice for a specific job, so weigh it against what your project actually needs.
Strengths Comparison
Polypropylene Strengths
- Can bend without damage; very rugged; strong layer adhesion; very low density
- Excellent chemical resistance
- Good fatigue resistance (living hinges)
ASA Strengths
- Excellent UV resistance (outdoors indefinitely), tough, matte surface
- Less warping than ABS; low viscosity enables very high speed printing
- High heat tolerance (~boiling water range)
Considerations
Polypropylene Caveats
- Extremely poor bed adhesion; severe curling/warping (worse when cooling)
- Supports nearly impossible to remove due to toughness/perfect layer adhesion
- Often requires specialized build surface and setup
ASA Caveats
- Still off-gasses; enclosure/ventilation recommended
- Can still warp; needs tuning