PolyFlex™ TPU90

Engineered for Superior Flexibility PolyFlex™ TPU90, developed from Covestro’s Addigy® family, is a thermoplastic polyurethane (TPU) filament designed to deliver outstanding flexibility without sacrificing printing speed.

Ultra-Soft Shore Hardness With a shore hardness of just 90A, PolyFlex™ TPU90 is exceptionally soft and highly flexible - making it ideal for applications that require a gentle touch and high elasticity.

Optimized for Direct Extruders Due to its very soft nature, a direct drive extruder is recommended to ensure smooth and reliable printing, minimizing the risk of filament jams or feeding issues.

Perfect for Soft, Functional Parts Choose PolyFlex™ TPU90 for projects like phone cases, watch straps, or any part that demands softness, flexibility, and comfort.

Parameter
Nozzle temperature	210 – 230 (℃)
Build surface treatment	PC and Texture PEI (Glue when needed)
Build plate temperature	25 - 60 (˚C)
Cooling fan	ON
Printing speed	30 – 70 (mm/s)
Retraction distance	3 - 6 (mm)
Retraction speed	40 - 60 (mm/s)
Closure Chamber	No Needed
Recommended support material	PolySupport™ and PolyDissolve™ S1
Drying setting	70˚C for 8h

Print Tips

This material can be printed on most printers, but it is highly recommended you use a direct extruder setup and not Bowden.

• The further the gap between your extruder and hotend, the more difficult this material will be to print.

• Print slow, and even slower if your extruder has a distance between itself and the hotend. 30mm/s - 60mm/s.

• Keep your cooling fan on for good surface quality.

• This material has amazing layer adhesion which will make using parent support material very difficult. It is suggested you design your part to not need support material as much as possible.

• TPU is known for being stringy, so it is going to be difficult to get rid of all of the stringiness/hair on the print.

• 90 refers to it's shore hardness of 90A.

FAQ

Can my printer print PolyFlex™ TPU90?

We highly recommend to use a direct drive printer to print PolyFlex™ TPU90. A direct drive printer is a printer with the extruder mounted on top of the hot end.

What makes PolyFlex™ TPU90 unique?

PolyFlex™ TPU90 is easier to print than similar flexible material thank to its high melt index.

What does the number stand for?

The number next to "TPU" refers to the shore hardness. A higher number means a harder material. TPU90 is our softest, followed by TPU95 and then TPU95-HF (which is closer to a shore hardness of 98A than 95A).

In 3D printing the shore hardness is only an indication on how flexible the printed part will be. However it is important to also take in consideration the infill percentage, number of walls, top/bottom layers and the layer height.

Do you have any suggestions when printing TPU90 with support structure on single extruder printer?

Generally, when printing with TPU materials, if support structures are needed, we recommend using specialized support materials such as PolyDissolve™ S1. However, considering the single extruder devices that users may have, we suggest customers adjust the orientation of the model to minimize the use of support structures, or place support structures in inconspicuous areas that won't affect the appearance.

Do you have a certificate that TPU90 complies with the essential safety and performance requirements of Regulation (EU) 2017/745 of the European Parliament and of the Council of 5 April 2017 on medical devices?

The tests done on PolyFlex TPU90 are by method of ISO 10993 - 5 (Tests for in vitro cytotoxicity), 10 (Tests for irritation and skin sensitization), 11 (Tests for systemic toxicity), 23 (Tests for irritation).

This material can pass ISO-10993 -5/10/11/23 and is safe for skin contact applications.

Find the test results HERE

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