Getting a 3D printer opens the door to a universe of uses. Be it something recreational like tabletop gaming parts or functional like prosthetics, there is one thing you will need to put all these possibilities together - filament.
There is an abundance of 3D filaments available on the market for you to choose from. The PLA and ABS filaments are the standard choices as they are very reliable in terms of product quality and workability. However, there are some very specific needs that will require an alternative 3D printing filament, and that is where the tpu filament comes into play. Below I will list the unique characteristics of the tpu filament, their applications and how to work with them.
What is TPU Filament?
Simply said, the Thermo Plastic Polyurethane (TPU) is a plastic with rubber-like characteristics. It has the ability to stretch up twice as its original length and revert to its original form without deformation. Because it combines both a low polarity segment and high polarity segments into a single polymer chain, the TPU filament delivers an improved combination of elasticity, rigidity, and flexibility. The result is a product that makes it easier for a 3D printing extruder mechanism to handle.
Benefits of Using TPU Filaments
TPU filaments are resistant to abrasion and have proved to perform well in low temperatures. It is generally used to print products that need to flex or bend during certain applications, such as medical devices, sporting goods, footwear, outer cases for mobile devices, inflatable rafts, and automotive instrument panels. Due to its resistance to greases, oils, and a variety of solvents, this filament has been used in a range of industrial applications. Layer to layer adhesion of TPU is generally excellent due to its very soft nature. This makes prints made from TPU come out very durable.
How to Work with TPU
When working with flexible filaments it is recommended to use direct extruders. While it is possible to work with a Bowden extruder, extra tuning of the printer's setting may be required to get satisfying results. If you are unsure of your printer's capabilities, ask the printer manufacturer if your particular model is approved for use with flexible filaments.
When working with TPU, it is also a good idea to print at very low printing speeds. That is because flexible filaments tend to bend and contract under high stress, so printing at fast speeds may clog up your extruder.
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