3D Printing
Flexible Filament for 3D printers
Here you will find a great variety of fFlexible filaments in diferent colors and sizes. Everything you need is here! – 3Dprint.me
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The flexible filament (Elastomer or Thermoplastic TPE) is a material resulting from a combination of plastic and rubber, also known as thermoplastic elastomers. Within the variety of flexible filament, there are mainly 2 types, but before you decide to buy one type or another of flexible filament, you must take into account that the concepts “Flexible” and “Elastic” are not the same. This type of filament can be used in a normal 3D FDM (Fused Deposition) or FFF printer. An elastic filament will allow you to stretch the piece, while a flexible filament will allow the curvature of the printed piece. If you want to know a little more, we will detail these concepts and the different types of flexible filament materials below. The biggest disadvantage you may encounter is retraction. Unlike other more rigid materials such as PLA, the flexible filament is very weak, like a rubber that does not return to its original state. Therefore, when there is retraction in printers with Bowden systems, the filament can get stuck when retracted. There is a solution to the problem of shrinkage with flexible filaments, and it is simply to change the guide tube to a PTFE one, like the Capricorn XS bowden tube, which helps to reduce the friction of the filament and the shrinkage. You can also deactivate the shrinkage in printers with a bowden system. On the other hand, on 3D printers with direct extrusion system this is less likely to happen. All materials have a hardness, in the case of flexible ones this becomes even more important. You can find different grades: On the other hand, the brand Fillamentum commercializes spools with hardness 92A and 98A, which are differentiated by their elasticity (92A more elastic than 98A). As the filament is softer and presents less resistance to friction than others. If possible, insert the flexible filament directly into the extruder, without using a feed tube. Ideally from above, and the higher the better. Conservation recommendations. The flexible filament is hygroscopic, i.e. it absorbs a lot of humidity from the environment. As always, we recommend keeping the filaments in cool and dry places. If your filament has been in use for a long time, and has absorbed humidity in such a way that when printed it looks like bubbles, then you should put the flexible filament in the oven for about 5-6 hours at about 180 ºC. The 3D printing of the first layer is complicated, and requires a little extra attention. You must check that it adheres correctly to the bed, and that the residue does not stick to the nozzle. The flexible filament is sticky, so the nozzle must be cleaned before and after each print. Flexible filament spools can be purchased in both 1.75mm and 3.00mm Remember that when we talk about 3.00 mm coils we also refer to 2.85 mm. One consideration: in the case of flexible filaments, it is better to print in 3.00 mm format. Why? Well, it is basically because of the previously mentioned issue of shrinkage and extruder thrust. When the filament tends to bend, it is more difficult to bend the filament with greater thickness. But don’t worry, you will be able to print it perfectly with a thickness of 1.75mm in 3D printers with Bowden system using a quality PTFE tube or choosing a flexible material with a higher hardness, for example, between 95A and 98A which is easier to extrude. Although this material is relatively recent, there is a wide range of colors to choose from, with the main ones being White These spools can be found in different sizes: When buying a flexible filament, we must take into account the different types of materials that exist: TPU, TPE and PCTPE. There are no filaments with effects, as in the case of PLA, which we can find marble, wood, metallic effects, etc.. The TPE (Thermoplastic Elastomer) filament is characterized by its shock absorption, it resists breakage, it recovers its original shape when the material is finished stretching and it is also recyclable. The filament can lose elasticity if temperatures are higher than indicated. TPU (Thermoplastic Polyurethane) material is slightly more rigid (less elastic, more flexible) than TPE. It is also a material resistant to cold, chemical agents and sun rays (UV). Within the Nylon filaments, there are some with greater felxibility. This is the case of PCTPE, but these materials are still Nylon. Perhaps the most famous brand is FilaFlex, however, today several brands are marketed, among which we highlight: En la gama de filamentos flexibles, puedes encontrar precios muy competitivos dependiendo de la marca y el peso que elijas.Properties, characteristics and uses of the flexible filament for 3D printers
The main problem of printing Flexible Filament
Material Shore Hardness Grades
Things you should know before buying Flexible Filament:
Conservation
Starting: the first layer with the flexible filament
Sections 1.75mm and 3mm
Filament color range
Different shades of green
Blue
Sea water (very clear blue)
Different shades of yellow
Transparent
Skin
Red
Gold
Black
PurpleWeight or Size
Range of materials in Flexible Filaments
TPE Filament (More Elastic)
The use of pieces printed on TPE filament makes them lose elasticity over time.TPU Filament (More Flexible)
PCTPE (Nylon) Filament
Flexible Filament Brands
Filaments