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Add to SafariWhen comparing eSUN PETG Filament vs NinjaFlex Flexible Filament, the Slant community recommends NinjaFlex Flexible Filament for most people. In the question“What are the best filaments for 3D printing?” NinjaFlex Flexible Filament is ranked 5th while eSUN PETG Filament is ranked 8th. The most important reason people chose NinjaFlex Flexible Filament is:
This is truly elastic material, which means that the material will deform under stress (stretched or compressed), but the moment stress is removed, the material original shape is restored. The exception is if tensile/compressive yield point is reached: in this case permanent deformation occurs. This filaments tensile yield point takes place at 660% elongation, which means it's very hard to break this material only by applying tensile stress.
Specs
Question Ranking
Pros
Pro Can safely be used for applications where it comes in contact with food
This filament can safely be used to create e food and drink containers or parts for food production lines (like conveyor belt parts, for example ), unlike ABS, PLA or other popular 3D printing filament materials. PETG filament is food safe, as there are no potential hazards to food or human body while in contact with this material. In fact, PETG is a modified version of PET, which is a material widely used for food packaging.
Pro Simultaneously strong and flexible
PETG is pretty much as strong as ABS (in terms of direct load) and nearly as flexible as PLA, combining the best characteristics of these two materials. On top of that, printing PETG is easier than printing ABS, since it does not require a heated bed and has better layer adhesion.
Pro Can be used with nearly every 3D printer
This filament is available for both 1.75 mm and 3.0 mm extruders. It also does not require a heating bed when printing, although it’s better if you have one. It can also be printed using standard brass nozzles.
Pro Recovers original shape after deformation
This is truly elastic material, which means that the material will deform under stress (stretched or compressed), but the moment stress is removed, the material original shape is restored. The exception is if tensile/compressive yield point is reached: in this case permanent deformation occurs. This filaments tensile yield point takes place at 660% elongation, which means it's very hard to break this material only by applying tensile stress.
Pro Good chemical resistance to a variety of substances
This filament has limited resistance to a variety of alcohols, alkali and organic substances (fuels, oils, etc.). This contrasts with what happens with many other 3D printable material, that can't even withstand contact with water.
Pro NinjaTek has published several case studies of filament applications
Several examples of how NinjaFlex was used in real-world applications are available. This is a great move from NinjaTek, since, even though it is useful to see how good a product is “on paper”, it’s even better to see examples of how it was actually used. All case studies are well documented and provide visual evidence of successful use.
Pro Can be used with virtually any standard 3D printer
You can use this filament with pretty much any standard 3D printer, since it's available in the two most commonly used diameters: 1.75 mm and 3.0 mm. The 3.0 mm spools are cheaper than the 1.75 mm ones. This is because it’s generally cheaper to produce 1 kg of 3.0 mm filament than 1 kg of 1.75 mm filament.
Pro Available in 10 different colors
This filament is available in 10 different colors, all of which are of very high quality and look rich.
Pro No heated printed bed required
This filament can be used with a printer without a heated bed, which is very convenient, since many 3D printers don't come with a heated bed by default or don't even have the option of adding one. Nevertheless, if your machine does have a heated bed, you can set it to 40ºC (recommended) and improve surface adhesion.
Cons
Con Filament packaging provides proper protection
The material comes in a spool packed inside a vacuum film, with an included desiccant. All this is packaged inside a tough cardboard box, which keeps everything safe during shipping and storage.
Con Finding the perfect setting takes some time and effort
While this filament is easy to print, getting to the "optimal results" level requires extra work. Because temperatures vary within the extruder used, finding the perfect printer settings will, most likely, take several attempts.
Con Material specifications sheet available only upon request
The material specifications sheet isn't publicly available, but it is possible to request it from regional eSUN distributors. This is a hassle mostly for engineers and those in the academia, who will surely need this, since they will have no choice apart from spending some time and effort to get the specifications sheet. It would be better to have the specs available from the get-go.
Con Complicated to print without a direct-drive extruder
The filament itself is very flexible, which means that non-direct-drive extruders will have the issue of their bowden tubes clogging up. This is normally fixed by experimenting with the material feed rate and the extruder temperature (this tweaking process takes some time and effort). Double check if you have a direct-drive extruder before purchasing this filament, which avoids this bothersome process.
Con Unprotective filament packaging
The filament packaging doesn't provide adequate protection for the material, which is quite surprising, considering its high price. The spool is shipped simply sealed with a vacuum film (without a silica pack) contained in a simple box. There's no proper external packing to protect the filament from mechanical damage. If the film breaks, the filament becomes vulnerable to air humidity, absorbing water and, consequently, compromising the printing process.
