PEEK vs TPU
Compare PEEK and TPU filaments side-by-side. See which one is best for your 3D printing project.
PEEK
CPolyether Ether Ketone
Exceptional mechanical/thermal/chemical resistance; self-extinguishing; near metal alternative
TPU
SThermoplastic Polyurethane
Perfect layer adhesion; extremely impact resistant; nearly indestructible
Detailed Comparison
Property
PEEK
TPU
Tier Rating
Tier C
Tier S
Family
PEEK-family
Flexible
Nozzle Temp
360-450°C
200-240°C
Bed Temp
120-200°C
30-60°C
Enclosure
required
not needed
Cooling
Minimal and controlled
Moderate cooling
Moisture Sensitivity
high
high
Strengths Comparison
PEEK Strengths
- Exceptional mechanical/thermal/chemical resistance; self-extinguishing; near metal alternative
- Extreme heat resistance, chemical resistance, and strength
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
PEEK Caveats
- Extremely expensive (~$700/kg) and very difficult to print; warping/curling issues
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 PEEK or TPU better for 3D printing?
TPU is generally rated higher (Tier S) compared to PEEK (Tier C). However, the best choice depends on your specific needs: PEEK is best for Exceptional mechanical/thermal/chemical resistance; self-extinguishing; near metal alternative, while TPU is best for Perfect layer adhesion; extremely impact resistant; nearly indestructible.
What are the temperature differences between PEEK and TPU?
PEEK prints at 360-450°C nozzle / 120-200°C bed. TPU prints at 200-240°C nozzle / 30-60°C bed.
Do PEEK and TPU need an enclosure?
PEEK: required. TPU: not needed.
Which is more beginner-friendly: PEEK or TPU?
TPU is more beginner-friendly as it doesn't require an enclosure.