TPU 85A filament: the numbers
Thermoplastic polyurethane, Shore 85A. Typical uses: soft grips, seals, wearables, shoe soles.
1.16 g/cm³density (1.11–1.2)
358 mper kg at 1.75 mm
2.79 gper metre
210–240 °Cnozzle
30–50 °Cbed
1%linear shrinkage
$35typical per kg ($25–55)
60 °Cmax service temperature
Not neededenclosure
70 °C · 8 hdrying (medium hygroscopic)
4/5difficulty · medium strength · flexible
Printing tips
- Feed straight into a direct-drive extruder; it will not survive a Bowden tube or multi-material unit.
- Print slowly (15-30 mm/s) with retraction off.
- Glue stick on a cold or barely warm bed; it sticks too hard to hot PEI.
Grams ↔ metres for TPU 85A
What a TPU 85A print costs
Questions about TPU 85A
What temperature should I print TPU 85A at?
Nozzle 210–240 °C and bed 30–50 °C are the usual range. Start in the middle and tune with a temperature tower; no enclosure is needed.
How many metres of TPU 85A are in a 1 kg spool?
About 358 m at 1.75 mm (density 1.16 g/cm³). One metre weighs 2.79 g.
Does TPU 85A need drying?
Yes — it is moderately hygroscopic. Dry at 70 °C for 8 hours before printing if it has been open for more than a few days.
How much does TPU 85A shrink?
About 1% linear. To compensate, scale X and Y by 101.01% in the slicer, or measure a test print and use the shrinkage calculator.
Sources: siraya.tech, move.forward-am.com, shop3duniverse.com