PEKK vs TPU
Compare PEKK and TPU filaments side-by-side so you can pick the right one for your 3D printing project.
PEKK vs TPU: PEKK is known for nearly peek-class strength with far better print success..., while TPU is known for excellent layer adhesion. TPU is easier to print; PEKK prints at higher nozzle temperatures (340-380°C vs 200-240°C). Choose PEKK for nearly peek-class strength with far better print success..., or TPU for excellent layer adhesion.
Key differences at a glance
PEKK
APolyether Ketone Ketone
Nearly PEEK-class strength with far better print success rate
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
PEKK Strengths
- Nearly PEEK-class strength with far better print success rate
- Described as one of the easiest high-end polymers to print once equipment checks pass
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
PEKK 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