eFil TPU 85A belongs to the eFil family of flexible TPU-based filaments. Its hardness is Shore 85A , similar to that found in the heel of a shoe. This filament is recommended for advanced users, as it requires a greater learning curve than with harder materials, but we will be able to reach elongations of 520%. Its flexibility makes it ideal for applications where elastic materials with very good recovery are required. In addition, we can obtain different degrees of hardness by varying the percentage of filling during 3D printing.
The eFil TPU 85A has excellent properties of chemical resistance both to acids and to bases, as well as a wide variety of solvents. It also has excellent resistance to abrasion, impacts and perforations and can withstand temperatures up to 100ºC. On the other hand, it has a great adhesion , so its printing does not present warping problems, even without a heated bed or other fixing methods. This great adhesion provides a perfect bond between layers , producing parts much more resistant to tearing. Its tensile strength reaches 33 MPa and impact resistance is 100 N / mm.
Check that your printer is compatible with flexible filaments. Extruders with adjustable traction degree are recommended. The ideal traction point is where the extruder makes a strong pull on the filament without strangling it. It is not advisable to use Bowden extruders. It is always advisable to slow down the printing speed until you have mastered the appropriate parameters for each printer. You can improve its performance with a previous drying of 30 to 60 minutes at 90ºC.
It is a very versatile material with countless applications in prototyping, footwear, the sports world, protections or creation of personalized tools.
