Semi-rigid TPU (55D–75D) prints at about 230 °C with a 45 °C bed and 40% part cooling. Usable range 215–245 °C nozzle, 25–60 °C bed. No enclosure needed.
TPU 55DTPU 60DTPU 75DShore D TPUSemi-rigid TPUTPCHard TPU
Starting settings
Nozzle
215–245 °C (start 230)
Bed
25–60 °C (start 45)
Part fan
0–60% (start 40%)
Wall speed
20–45 mm/s
Max volumetric flow
6 mm³/s
Shrinkage
0.5%
Softens at
-30 °C
Enclosure
Not needed
Nozzle size
0.4 mm or larger — 0.4 mm recommended
Nozzle material
Brass is fine
Drying
50 °C for 6 h
Speed
Faster than the softer grades, 20–45 mm/s, and workable on Bowden where 85A really is not. Still slower than PLA.
Bed surface
Clean smooth PEI at 45 °C, no adhesive needed.
Nozzle
0.4 mm is fine — this grade is stiff enough not to need the help a softer one does.
What bites people
The right place to start with flexibles. Stiff enough to feed almost like a normal filament while still bending in the hand.
Also sold as TPC, and occasionally just labelled "semi-flexible" with no number at all. If the spool gives a shore rating on the D scale, this is the entry to use.
Being easier does not make it PLA. Retraction still wants to stay modest and speed still matters more than on a rigid material.