PEEK vs TPU
Compare PEEK and TPU filaments side-by-side so you can pick the right one for your 3D printing project.
PEEK vs TPU: PEEK is known for exceptional mechanical/thermal/chemical resistance, while TPU is known for excellent layer adhesion. TPU is easier to print; PEEK prints at higher nozzle temperatures (360-450°C vs 200-240°C). Choose PEEK for exceptional mechanical/thermal/chemical resistance, or TPU for excellent layer adhesion.
Key differences at a glance
PEEK
CPolyether Ether Ketone
Exceptional mechanical/thermal/chemical resistance; self-extinguishing; near metal alternative
TPU
SThermoplastic Polyurethane
Excellent layer adhesion; extremely impact resistant; highly durable
Detailed Comparison
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
PEEK Strengths
- Exceptional mechanical/thermal/chemical resistance; self-extinguishing; near metal alternative
- Extreme heat resistance, chemical resistance, and strength
TPU Strengths
- Excellent layer adhesion; extremely impact resistant; highly durable
- Great for combat robots, tactical/rough-use parts
- Rubber-like parts (gaskets, grips, bumpers, wheels)
Considerations
PEEK Caveats
- Extremely expensive and very difficult to print; warping/curling issues (pricing varies widely by brand, so verify current pricing)
TPU Caveats
- Slow printing; retraction can cause jams (especially in Bowden setups)
- Stringing is common
- Very moisture sensitive; wet TPU prints poorly