PSU vs PLA
Compare PSU and PLA filaments side-by-side. See which one is best for your 3D printing project.
PSU
BPolysulfone
Very high heat resistance (Tg ~187C) and retains strength near that range
PLA
APolylactic Acid
Easiest to print, cheap, widely available, fast, good bridges/overhangs, easy support removal
Detailed Comparison
Property
PSU
PLA
Tier Rating
Tier B
Tier A
Family
PSU
PLA
Nozzle Temp
340-380°C
185-235°C
Bed Temp
140-180°C
50-60°C
Enclosure
required
not needed
Cooling
Low cooling
High part cooling usually beneficial
Moisture Sensitivity
moderate
moderate
Strengths Comparison
PSU Strengths
- Very high heat resistance (Tg ~187C) and retains strength near that range
- Resists water/radiation/chemicals; can be sterilized
- Enables 'citizen science' type projects
PLA Strengths
- Easiest to print, cheap, widely available, fast, good bridges/overhangs, easy support removal
- Stiff non-composite thermoplastic, good tensile strength
Considerations
PSU Caveats
- Often nylon is a better overall choice unless you need the heat/sterilization envelope
PLA Caveats
- Creeps under sustained load
- Poor heat resistance, UV degradation, can shatter on drops
- Not great for sanding/gluing/painting/touch-ups
Frequently Asked Questions
Is PSU or PLA better for 3D printing?
PLA is generally rated higher (Tier A) compared to PSU (Tier B). However, the best choice depends on your specific needs: PSU is best for Very high heat resistance (Tg ~187C) and retains strength near that range, while PLA is best for Easiest to print, cheap, widely available, fast, good bridges/overhangs, easy support removal.
What are the temperature differences between PSU and PLA?
PSU prints at 340-380°C nozzle / 140-180°C bed. PLA prints at 185-235°C nozzle / 50-60°C bed.
Do PSU and PLA need an enclosure?
PSU: required. PLA: not needed.
Which is more beginner-friendly: PSU or PLA?
PLA is more beginner-friendly as it doesn't require an enclosure.