Flexible Filament: 5 Best Options
All flexible filaments are made of thermoplastic elastomers, as a rule (TPE). This is a combination of hard plastic and rubber. Indeed, as the name implies, these materials are incredibly elastic in nature. They make it possible to stretch and flex the filament's plastic structure very easily. It's important to understand what flexible filaments are before discussing the best flexible filament. Also, it’s important to look at the best 3D modeling software.
Why SelfCAD Is The Best 3D Modeling Software for Creating 3D Models
SelfCAD is a powerful and easy-to-use 3D modeling software perfect for both beginners and experienced designers. With SelfCAD, you can quickly create complex models without hours of training. The software has freehand drawing and sketching tools that make it easier for you to bring your ideas to life. There is also an image to 3D tool that makes creating a 3D model from an image easier. An in-built slicer makes it easier to prepare your designs for 3D printing by generating the G-code that you can send to your printer. In addition, SelfCAD is one of the most affordable 3D modeling software options, making it a great value for your money. Whether you're looking to create simple designs or complex models, SelfCAD is the best 3D modeling software for the job.
Flexible Filament
Flexible filaments are 3D printer filaments that are flexible, as the name suggests. They're made of various rubber-like thermoplastics that have high tear and tensile strengths, great impact resistance, and enough flexibility to not restore to their former shapes when mechanically stressed. Other flexible filaments have a low extruder temperature and no heated bed, making them a popular choice among 3D printing enthusiasts who may not want to deal with the consistent working temperatures and poor bed adhesion, which needs the most high-temp filaments.
Different Types of Flexible Plastic
1. TPE (Thermoplastic Elastomers): TPEs are a type of plastic-rubber mix. TPU and TPC are included in this category, although there are others. These plastics have a rubber-like feel to them. They're commonly used in injection molding, and parts created from them can bend or stretch without deforming.
2. TPU (Thermoplastic Polyurethane): TPU (thermoplastic polyurethane) is a type of TPE that has gained popularity in 3D printing due to its ability to be adjusted in terms of hardness. TPUs can be as flexible as rubber or rigid as plastics, making extrusion easier. TPU filament is also more robust than TPE filament and can withstand abrasion, oils, chemicals, extreme heat, and cold.
3. TPC (Thermoplastic Co-Polyester): Another typical form of TPE is TPC (thermoplastic co-polyester), which has good temperature resistance, excellent UV resistance, and high strength. It's precious in biomedical applications as well as wearable and medical gadgets. These polymers, which are more typically employed in powder bed fusion 3D printing, have a bending memory and produce extremely robust yet rubber-like objects.
4. TPS (Styrene-Based Thermoplastic Elastomer): The velvety touch of TPS (styrene-based thermoplastic elastomer) is its distinguishing feature. It has better non-slip qualities than other flexible materials, making it excellent for grippers. TPSs absorb less moisture than other TPEs, allowing printing without pre-drying. TPE filaments come in various shapes and sizes, with thermoplastic polyurethane (TPU) being the most popular among flexible 3D printing filaments. Often, these terms are used interchangeably.
It's worth noting that the degree of elasticity of a flexible plastic-based filament depends entirely on the type of TPE utilized. Aside from that, the chemical formulation used by the filament producer or manufacturer plays a significant influence. For instance, some filaments, like a stiff automobile tire, can be somewhat flexible. On the other hand, several other filaments can be elastic and totally flexible. Consider a rubber band as an analogy.
Let's take a closer look at the more flexible filaments available to get the right one for your 3D printer.
Best Flexible Filaments for 3D Printing
Although numerous flexible or squishy 3D printing filaments are available. Some are superior to others. The five best flexible filaments for 3D printing are listed here, and they may be used flawlessly to achieve excellent results.
1. NinjaTek
Ninjatek TPU filament: Image Source: all3dp.com
Ninjatek TPU filament is one of the more expensive options on the list, but it's worth it because of its excellent print quality, ease of usage, and overall performance. It's an excellent choice for commercial applications because it's recommended for usage with sports equipment, medical gadgets, and industrial manufacturing. Vibration dampening, abrasion resistance, and chemical resistance are all characteristics of Ninjatek TPU. The material's shore hardness of 85A provides enough stiffness to sustain repetitive high-impact force without failing.
Ninjatek is textured for easier extrusion via the extruder and is optimized for 3D printing. It also has a high level of dimensional accuracy, making extrusion in most 3D printers simple and consistent.
Specification:
2. Filaflex
Filaflex Filament: Image Source: fabbaloo.com
Filaflex was first introduced in 2013 as one of the first elastic filaments for 3D printers. The business has since released many variations, including a TPU made entirely of recyclable materials and a new electrically conductive TPU called Conductive Filaflex. Filaflex filaments have excellent print bed stickiness. Therefore they don't require a heated bed, blue tape, or other adhesive. They're also odorless and solvent, acetone, and gasoline resistant.
Reciflex is a flexible TPU filament made entirely of recycled materials, including scraps from the footwear industry and Recreus' own production. Due to variances attributed to its origin as a recycled material, its hardness fluctuates between 96A and 98A Shore, which are nearly undetectable in printed parts.
Specification:
3. MatterHackers
MatterHacker Filament: Image Source: matterhackers.com
The MatterHackers Pro Series TPU is unquestionably more adaptable. They also have a Pro Series Flex TPE that is excellent if you want something even bendier. The Pro Series TPU is a highly malleable elastomer that may be used to make robust prints that are nevertheless flexible. It is also highly abrasion-resistant. This TPU will stick to most types of beds without adhesives, and a cooling fan is strongly recommended.
Specification:
4. Polymaker
Polymaker's PolyFlex Filament: Image Source: 3djake.com
Polymaker's PolyFlex series includes three TPUs based on Covestro's industrial polymer chemistry. PolyFlex TPU90 is designed to offer a high level of flexibility without sacrificing print speed. It also has the capacity to withstand ultraviolet (UV) light damage. PolyFlex TPU95 is designed to work with most desktop 3D printers, whereas PolyFlex TPU95-HF is designed for high-speed printing, according to the firm.
It comes in a resealable aluminum box with a printed filament gauge and print settings on the spool. It has a limited number of colors, but each one is bright and comes in both usual sizes (1.75 mm and 2.85 mm).
Specification:
5. ColorFabb
ColorFabb's nGen Flex Filament: Image Source: matterhackers.com
ColorFabb's nGen Flex is a flexible material explicitly created for industrial extrusion-based additive manufacturing methods and manufactured with Eastman's Amphora FL6000. Its layer-to-layer adhesion and melt strength allow it to print faster than other elastomeric materials, saving you time. The nGen Flex is a high-durability, robust engineering-grade material that allows designers to construct instrumental parts that can endure the rigors of regular use.
The high-temperature resistance of nGen Flex allows steam sterilization, making it a perfect polymer for additive manufacturing of prosthetics and orthotics, automotive parts, garments, tooling, and various consumer products. Variable shore hardness reduced weight and density, and light touch are the features of the ColorFabb varioShore TPU. Changing the print temperature allows for varying softness. Prints produced at 200°C to 250°C are very soft, but prints produced at lower temperatures are more rigid.
Specification:
3D Printing with Flexible Filament: Few Tips
Flexible filament can be challenging to work with within 3D printing due to its elastic qualities, which allow it to bend and stretch in places it shouldn't. Some of these issues can be avoided using the right TPU settings and temperatures when 3D printing with TPU filament.
When using TPU filament or other flexible materials for 3D printing, make careful to:-
Slowly print: TPU filament has a printing speed significantly lower than other filament materials.
Retraction should be turned off: When 3D printing TPU filament, using retraction might cause jams, clogs, and mechanical failures in your 3D printers. Turn it off or use the smallest retraction settings you can.
Reduce the tension on the filament spool: To avoid print quality difficulties and mechanical failures like jams and clogs, place your spool somewhere to lessen tension when the filament is going into the extruder.
To make your flexible part more or less elastic, change the infill parameters: More infill stiffens and reduces the flexibility of your prints, whilst less infill does the opposite. Different infill patterns result in varying degrees of elasticity. You might not want to employ the strongest infill pattern when searching for flexibility.
Conclusion
In summary, developing remarkable and flexible filaments has greatly benefited the 3D printing community. They can now print a wide range of valuable products using a wide range of flexible filaments for the highest print quality, even with difficult-to-print builds.
Enjoy powerful modeling, rendering, and 3D printing tools without the steep learning curve.
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