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The renowned manufacturer of filaments for 3D printing Nanovia has put together two of the most resistant plastic materials that exist in the industrial field, polycarbonate (PC) and PTFE (PolyTetraFluoroEthylene) to obtain a truly advanced final material.
This material is based on alloy PC with a large percentage of PTFE. Polycarbonate provides its property with high mechanical resistance and PTFE complements it by reducing wear and friction. At higher the PC/PTFE is resistant to high temperatures (130ºC), becoming a safe bet when making mechanical moving parts such as gears and bearings.
The coefficient of friction of the PC/PTFE is really low (in static 0.18 and dynamic 0.14), values that very few materials of the world of 3D printing have. The friction of the wood against itself presents higher values (in static 0.37 and in dynamic 0.2), and that of waxed wood against wet snow presents lower but very close values (in static 0.14 and dynamic 0.10). As shown in the previous data, the PC/PTFE is ideal for making parts in contact with rolling elements.
The previous property is directly complemented by the low wear coefficient (4*10^-7 mm3/Nm). This quality is essential to make durable parts without worrying about the proper functioning of the manufactured part. In addition, the PC/PTFE filament supports high operating temperatures even at high pressure loads (130°C with a pressure of 1.8 MPa) and is considered a self-lubricating material. If you need a material with even lower wear values, it's recommended to use the Tribo Plus.
The PC/PTFE also stands out as the only existing hydrophobic filament for 3D printing, this means that this material repels water. This is because it isn't a material miscible with water, the molecules of the PC/PTFE aren't able to interact with water molecules neither by ion-dipole interactions nor by hydrogen bonds. A clear example of this case would be to mix water with oil.
The PC/PTFE is recommended for experienced users who have 3D printers with closed chamber and high power extruders (285-295ºC). As in the case of using PC filament (PC-MAX), a hot base (100-110ºC) with a BuildTak adhesive sheet is recommended.
In summary, the fusion of the PC with the PTFE results in a material with a high mechanical resistance, with a high resistance to temperature and with a high resistance to humidity, which makes it an advanced material for 3D printing FDM/FFF.