PPA vs ASA
Compare PPA and ASA filaments side-by-side so you can pick the right one for your 3D printing project.
PPA
CPolyphthalamide
Semi-aromatic nylon: aromatic rings in the backbone push Tg to ~130C and the melting point to ~300C
ASA
AAcrylonitrile Styrene Acrylate
Excellent UV resistance (outdoors indefinitely), tough, matte surface
Detailed Comparison
Property
PPA
ASA
Tier Rating
Tier C
Tier A
Family
Nylon (PA)
ASA
Nozzle Temp
280-310°C
220-275°C
Bed Temp
100-120°C
90-110°C
Enclosure
required
recommended
Cooling
Minimal
Low to moderate; avoid drafts
Moisture Sensitivity
high
moderate
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
PPA Strengths
- Semi-aromatic nylon: aromatic rings in the backbone push Tg to ~130C and the melting point to ~300C
- Holds strength, stiffness and dimensions at temperatures where PA6, ABS and PETG soften
- Strong resistance to oils, greases, fuels and industrial chemicals
- Absorbs far less moisture than PA6, so properties stay consistent in humid air
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
PPA Caveats
- Needs a ~300C-capable all-metal hotend and an enclosure, which rules out most desktop printers
- Unfilled PPA is usually the wrong buy: most commercial 3D printing PPA is sold carbon- or glass-filled
- Expensive, and demanding drying (roughly 100-140C) before every print
ASA Caveats
- Still off-gasses; enclosure/ventilation recommended
- Can still warp; needs tuning
Frequently Asked Questions
Is PPA or ASA better for 3D printing?
ASA is generally rated higher (Tier A) compared to PPA (Tier C). However, the best choice depends on your specific needs: PPA is best for Semi-aromatic nylon: aromatic rings in the backbone push Tg to ~130C and the melting point to ~300C, while ASA is best for Excellent UV resistance (outdoors indefinitely), tough, matte surface.
What are the temperature differences between PPA and ASA?
PPA prints at 280-310°C nozzle / 100-120°C bed. ASA prints at 220-275°C nozzle / 90-110°C bed.
Do PPA and ASA need an enclosure?
PPA: required. ASA: recommended.
Which is more beginner-friendly: PPA or ASA?
Neither is particularly beginner-friendly - both typically require an enclosure.