PSU vs TPU
Compare PSU and TPU 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
TPU
SThermoplastic Polyurethane
Perfect layer adhesion; extremely impact resistant; nearly indestructible
Detailed Comparison
Property
PSU
TPU
Tier Rating
Tier B
Tier S
Family
PSU
Flexible
Nozzle Temp
340-380°C
200-240°C
Bed Temp
140-180°C
30-60°C
Enclosure
required
not needed
Cooling
Low cooling
Moderate cooling
Moisture Sensitivity
moderate
high
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
TPU Strengths
- Perfect layer adhesion; extremely impact resistant; nearly indestructible
- Great for combat robots, tactical/rough-use parts
- Rubber-like parts (gaskets, grips, bumpers, wheels)
Considerations
PSU Caveats
- Often nylon is a better overall choice unless you need the heat/sterilization envelope
TPU Caveats
- Slow printing; retraction can cause jams (especially in Bowden setups)
- Stringing is common
- Very moisture sensitive; wet TPU prints poorly
Frequently Asked Questions
Is PSU or TPU better for 3D printing?
TPU is generally rated higher (Tier S) 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 TPU is best for Perfect layer adhesion; extremely impact resistant; nearly indestructible.
What are the temperature differences between PSU and TPU?
PSU prints at 340-380°C nozzle / 140-180°C bed. TPU prints at 200-240°C nozzle / 30-60°C bed.
Do PSU and TPU need an enclosure?
PSU: required. TPU: not needed.
Which is more beginner-friendly: PSU or TPU?
TPU is more beginner-friendly as it doesn't require an enclosure.