1. Features of TPU Filament
1.1 Strong flexibility: The elasticity modulus of TPU is about 10~1000Mpa; the product made of TPU has good flexibility and resilience and it can be bent and deformed at will;
1.2 High mechanical strength: TPU product has the outstanding bearing capacity, impact resistance, and shock absorption performance.
1.3 Wide range of hardness: TPU has high elasticity in the hardness range of Shore A 60 ~ Shore D 80. Usually, change the proportion of each reaction component of TPU, you can get products with different hardness.
Supplementary note: TPU hardness is usually measured by Shore A and Shore D hardness testers. Shore A is used for softer TPU and Shore D is used for harder TPU. The hardness is mainly determined by the hard segment content in the TPU structure. The prints still maintain good elasticity and wear resistance with the hardness increasing. It should be noted that the lower hardness of the TPU, the higher requirements for the 3D printer.
1.4 Wide temperature range: TPU is flexible in a wide temperature range of -40~120℃ without plasticizers.
1.5 High cold resistance: The glass transition temperature of TPU is relatively low, and it still maintains good elasticity, flexibility, and other physical properties at -35℃.
1.6 Oil resistance and weather resistance: TPU has good resistance to oils including mineral oil, animal and vegetable oils, and lubricants, and some other solvents. In addition, TPU has good weather resistance and excellent resistance to high-energy rays.
2. Precautions Of Printing TPU:
2.1 Storage: Fix the end of TPU filament on the spool holes to avoid tangling and knotting; Seal the filament into a plastic bag and put them in a cool and dry environment to avoid moisture.
2.2 Building Volume limitation: TPU filaments are not suitable for printing big models that are too high, or the top of the model will swing because of the flexibility of the TPU, causing the unsmooth surface or failure prints.
2.3 Temperature: Do not open the cooling fan and blow the model directly to dissipate heat during printing;
4. Constructer of printer: The TPU filament is flexible so it has higher requirements for the printers' feeding system. Usually for the 1.75mm TPU filament, we recommend you choose the FDM 3d printer with a proximal extruder.