PPA vs PETG
Compare PPA and PETG 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
PETG
APolyethylene Terephthalate Glycol-modified
Tougher than PLA, higher temp tolerance, more durable in real-world use
Detailed Comparison
Property
PPA
PETG
Tier Rating
Tier C
Tier A
Family
Nylon (PA)
PETG
Nozzle Temp
280-310°C
230-250°C
Bed Temp
100-120°C
70-90°C
Enclosure
required
optional
Cooling
Minimal
Moderate cooling; too much cooling can hurt layer adhesion
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
PETG Strengths
- Tougher than PLA, higher temp tolerance, more durable in real-world use
- Good clarity and low friction among easy-to-print materials
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
PETG Caveats
- Overhangs/bridges sag; supports can be hard to remove
- Absorbs water fairly quickly
Frequently Asked Questions
Is PPA or PETG better for 3D printing?
PETG 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 PETG is best for Tougher than PLA, higher temp tolerance, more durable in real-world use.
What are the temperature differences between PPA and PETG?
PPA prints at 280-310°C nozzle / 100-120°C bed. PETG prints at 230-250°C nozzle / 70-90°C bed.
Do PPA and PETG need an enclosure?
PPA: required. PETG: optional.
Which is more beginner-friendly: PPA or PETG?
PETG is more beginner-friendly as it doesn't require an enclosure.