Flex Hard

TPU Flex Hard has been a special development for FDM/FFF processes. With an elongation of up to 480%, high chemical resistance and heat resistance up to 137°C, the material is suitable for a wide range of industrial applications.

  • Very impact- and break-resistant
  • Shore hardness D58
  • UV-resistant
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Material Information

Values according to ISO 527

Values according to ISO 527

Values according to ISO 306

Material Properties

Maximum Stress
Maximum Stress
Very good, one of the most robust materials for FDM/FFF
Elongation at Break
Elongation at Break
Excellent, breaking at an elongation of 480%
Temperature Resistance
Temperature Resistance
up to 137°C
Ease of Printing
Ease of Printing
Advanced, Bowden Extruder necessary
Visual Quality
Visual Quality
Smooth surface
Layer Adhesion
Layer Adhesion
Excellent
Impact Resistance
Impact Resistance
Excellent

Wiki-Tech

History

The polyurethane was developed in 1937 by Otto Bayer at IG Farbenindustrie AG. The most common occurrences are as foams, but also as casting resins, elastic fibres, moulding compound during moulding, varnishes or adhesives.

Manufacture

TPU Flex Hard is a thermoplastic polyurethane, a subgroup of thermoplastic elastomers, which is produced by the polyaddition of polyols and polyisocyanates. Depending on the degree of crosslinking, different properties are created, such as thermosets, elastomers or thermoplastics.

Due to their special molecular structure, the thermoplastic elastomers, unlike conventional plastics, are rubber-like even at room temperature. Therefore, they are less resistant to thermal changes than other plastics.

3D-Printing

When printing with TPU Flex, you should already have prior knowledge. The elastic properties make the filament harder to print and must be processed at a slower speed. In addition, bridging is difficult. Compared to TPE, the TPU is less prone to warping when using a heated printing bed.

Technical data

In the case of coatings, the polyurethane is used as a primer due to the good adhesive properties on surfaces, but also as clear coats due to solvent and chemical resistance. This is also the reason for the very good chemical resistance of the Extrudr TPU Flex Hard.

With the Shore hardness 58D, the Flex Hard is located at the lower elasticity spectrum of the TPU materials of Extrudr and is therefore the most stable.

Applications

The TPU Flex Hard is particularly suitable for industrial applications in extreme environmental conditions or applications where a certain degree of elasticity is required. In the automotive industry, the TPU is used for body seals and other elastic components. Due to the rubber-like construction, the material is well suited as a shock and vibration absorber.

Areas of Use

Industrial application, extreme environmental conditions

Wide color range
FDA compliant
RoHS compliant
Reach compliant
Odorless