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TPU is often called a bridge between rubber and plastic thanks to its outstanding toughness and strength combined with a wide range of “hardness”, from rubber-like to plastic-like. The BASF Ultrafuse TPU 85A filament has a Shore hardness 85A, which places it in the hard category (shoe heel hardness) but different degrees of hardness can be achieved depending on the design. The most distinguishing features of the Ultrafuse TPU 85A filament are:
Furthermore, the Ultrafuse TPU 85A exhibits resistance to microbiological attack and has successfully passed biocompatibility tests for cytotoxicity XTT, skin irritation and skin sensitisation. Nevertheless, the biocompatibility of a filament does not necessarily mean that the 3D printed part will have the same features, which is why each part and application should be carefully assessed case by case. The biocompatibility statement can be consulted in the Downloads section.
The outstanding thermal, mechanical and chemical properties of the Ultrafuse TPU 85A filament combined with its biocompatibility and resistance to microbiological attack make it an ideal material for applications in the fields of footwear, sports and leisure, as well as medical. In those fields, the Ultrafuse TPU 85A filament could be used to 3D print objects that need to be in contact with the patient’s skin and will get a significant amount of use, and therefore have to be resistant to wear and abrasion, but also strong and pleasant to the touch. The Ultrafuse TPU 85A filament could also be used in the automotive sector as well as in industrial manufacturing or agriculture and construction thanks to its chemical and heat resistance, great flexibility and low temperatures, damping properties and resistance to wear and abrasion.
Elongation at break (%) | 600 |
Tensile modulus (MPa) | 20 |
Surface hardness | 4 |
Softening temperature (ºC) | 114 |
Flexibility | Flexibility |
Abrasion resistance | Abrasion resistance |
Chemical resistance | Chemical resistance |
Medical use | Medical use |
Correct storage is as important for successful 3D prints as any other factor. The Ultrafuse TPU 85A filament should be stored in dry conditions before, during and after printing, at a temperature of 15-25 ºC. The spool can be kept in its original packaging, with a filament drying capsule, or in a vacuum sealed bag. An intelligent filament container can also be used to protect the filament from humidity. During printing, the spool can be placed in the Fiber Three filament drying case or an inline filament dryer. If the Ultrafuse TPU 85A filament absorbs excess moisture (which manifests in, among others, oozing, bubbles, sizzling and surface imperfections on the part), it should be dried at 70 °C in a hot air dryer or vacuum oven for at least 5 hours.
It is recommended to 3D print the Ultrafuse TPU 85A filament at a nozzle temperature of 200-220 ºC at a speed of 15-40 mm/s. The bed temperature should be set to 40 ºC and no adhesion products are necessary for great results, a clean glass bed is enough. The recommended extrusion system to use with the Ultrafuse TPU 85A filament is a direct drive extruder. Indirect drive extruders are prone to clogging or inconsistent throughput with flexible filaments.
General information | |
---|---|
Manufacturer | BASF |
Material | TPU 85A |
Format | Spool of 750 g |
Density | 1.11 g/cm3 |
Filament diameter | 1.75 mm or 2.85 mm |
Diameter tolerance | ±0.050-0.1 mm |
Filament length | ±280.9 m (Ø 1.75 mm - 750 g) ±105.9 m (Ø 2.85 mm - 750 g) |
Color | Natural |
RAL/Pantone | - |
Printing properties | |
Printing temperature | 200 - 220 ºC |
Base/bed temperature | 40 ºC |
Chamber temperature | ✗ |
Layer fan | ✗ |
Recommended print speed | 15-40 mm/s |
Recommended printing surface | Glass |
Mechanical properties | |
Izod impact resistance (ISO 180) | no break (notched) |
Charpy impact resistance (ISO 179-2) | no break (notched) 47.3 kJ/m2 (notched @ -30 ºC) |
Elongation at break (ISO 527) | 600 % |
Tensile strength | - |
Tensile modulus (ISO 527) | 20 MPa |
Flexural strength | - |
Flexural modulus | - |
Surface hardness | Shore 85A |
Electrical properties | |
Volumetric resistance (IEC 62631-3-1) | 2.6E+11 Ω cm |
Dielectric strength (IEC 60243-1) | 21 kV/mm |
Thermal properties | |
Softening temperature (ISO 306) | 114 ºC (@ 10 N) |
Melting temperature | - |
Specific properties | |
Transparency | - |
Brightness value | - |
Additional information | |
HS Code | 3916.9 |
Spool diameter (outside) | 200 mm |
Spool diameter (inner bore) | 50.5 mm |
Spool width | 55 mm |
* The typical values listed in this table should be considered as a reference. Actual values may vary depending on the 3D printer model used, part design and printing conditions. We recommend confirming the final results and properties with your own tests. For further information, please refer to the product data sheet.
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