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Filaflex Foamy

Ref.: TPU-FFLEX-FOAMY-BLACK-175-600

37.93 €

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Approximate delivery date: Friday 15 November

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Filaflex Foamy is a FDM 3D printing material by the renowned Spanish filament manufacturer Recreus. Filaflex Foamy is a flexible TPU filament designed that incorporates dynamic foaming technology to produce elastic and lightweight parts with fatigue resistance and a smooth matte finish. The dynamic foaming technology employed in Filaflex Foamy introduces a foaming agent distributed within the filament that activates at elevated temperatures. The same technology was used in the Recreus PLA-LW filament to achieve reduced weight for specialized applications.

A shoe model 3D printed with Filaflex Foamy in natural

Image 1. A shoe model 3D printed with Filaflex Foamy in natural. Source: Recreus.

The Shore hardness of Filaflex Foamy can be tailored from the default 78 A all the way to Shore 51 A by adjusting printing parameters (temperature, flow and speed), enabling users to create parts with varying levels of elasticity and texture. To illustrate this with an example, with an extrusion temperature of 245 ºC to 250 ºC and a flow rate between 60 % and 70 %, Filaflex Foamy will undergo an expansion and foaming process, resulting in a volume increase of 1.4 to 1.6 times its initial size. Conversely, when a higher flow rate is used (90-100 %), the resulting parts will have an elevated Shore hardness, reduced elasticity, and a absence of the characteristic foamy texture or finish. The versatility of this material is further highlighted by the possibility to modify color tones through temperature adjustments, producing an array of shades (the higher the extrusion temperature, the less saturated the color).

Video 1. The heat-induced foaming effect of the Filaflex Foamy filament under a microscope. Source: Recreus.

One of the most remarkable features of Filaflex Foamy is its exceptional efficiency – by using specific parameters, it is possible to print between 30 % and 40 % more with the same amount of material, substantially boosting productivity and material optimization. More about the specific settings required to achieve specific Shore hardness can be read in the product's technical datasheet in the Downloads section.

A shoe model 3D printed with Filaflex Foamy in black

Image 2. A shoe model 3D printed with Filaflex Foamy in black. Source: Recreus.

Thanks to its innovative and customizable properties, the Filaflex Foamy filament is well-suited for a wide range of applications, including manufacturing footwear, bicycle components, automotive parts (bumpers, gaskets, tires, and grippers), protective gear, and sound-absorbing elements. Filaflex Foamy stands out as a flexible filament that provides the ideal balance of flexibility, lightweight properties, and textural aesthetics for various 3D printing projects, making it a valuable addition to the toolkit of engineers, designers, and hobbyists alike.

General information
Material	TPU/TPE
Format	600 g / 2500 g
Density	0.709 g/cm³
Filament diameter	1.75 / 2.85 mm
Filament tolerance	±0.04 mm
Filament length	(Ø1.75 mm, 0.6 kg) ±351.8 m / (Ø2.85 mm, 0.6 kg) ±132.7 m / (Ø1.75 mm, 2.5 kg) ±1466.0 m / (Ø2.85 mm, 2.5 kg) ±552.7 m

Printing properties
Printing temperature	245-255 ºC
Print bed temperature	40 ºC
Chamber temperature	-
Cooling fan	-
Recommended printing speed	20-40 mm/s

Mechanical properties
Elongation at break	(DIN 53504-S2) 740 %
Tensile strength	(DIN 53504-S2) 37 MPa
Tensile modulus	- MPa
Flexural strength	- MPa
Flexural modulus	- MPa
Surface hardness	* Shore 51-78 A

Thermal properties
Softening temperature	(ISO 306) 94 ºC

Specific properties
Transparency	-

Other
HS Code	3916.9
Spool diameter (outer)	- mm
Spool diameter (inner hole)	- mm
Spool width	- mm

Other information

* Due to the unique design of Filaflex Foamy filament, the density, Shore hardness of the part and its colour can be modified by varying the flow settings. As for the colour of the part, it will be less saturated at higher printing temperatures. As for the Shore hardness, the part will have a lower Shore hardness at lower flow settings. Thus, an extrusion temperature of 250°C combined with a 90 % flow setting will result in a Shore hardness of 65A. Reducing the flow to 70 % will give a Shore hardness of 51 A.

The recommended extruder for the Filaflex Foamy filament is a direct extruder. In case of using a Bowden system, it is recommended to use a filament diameter of 2.85 mm to try to reduce the possibility of clogging. Another improvement that could be implemented would be the substitution of the guide tube for a PTFE tube such as the Capricorn XS, which would make the filament fit better, thus reducing friction. Another recommendation is to use a filament dryer such as PrintDry Pro or the Sunlu filament dryers , as printing with the humid Filaflex Foamy filament, in addition to causing extrusion problems, will generate a loss in thermal and chemical resistance of the material, and impeded creation of bubbles in the printed piece.

For this filament Recreus recommends a printing temperature of 245 - 255 °C with a maximum speed of 20-40 mm/s. Due to th unique design of the Filaflex Foamy filament, the part's Shore hardness as well as its color can be modified by varying the flow settings. As far as part color, it will be less saturated the higher the printing temperature. When it comes to Shore hardness, the part will have lower Shore hardness the lower the flow setting. Thus, an extrusion temperature of 250 ºC combined with a 90 % flow setting will give a part with 65 A Shore hardness. Reducing the flow to 70 % will give Shore hardness of 51 A.