3D-printed elastic products reinforced by means of continuous fibres and having asymmetrical elastic properties

A fiber-reinforced, 3D-printed elastic product, comprising

• a proportion by weight of ≥50% of a polymer having a number average molecular weight of ≥5000 g/mol, as measured by means of gel permeation chromatography, and
• a proportion by weight of ≥0.5% and ≤20% of one or more fibers, the one or more fibers being a continuous fiber having an aspect ratio of ≥100 and a length of ≥10 cm and ≤1000 cm,
• wherein the polymer comprises a thermoplastic elastomer,
• wherein the product is at least partially produced by means of a Fused Filament Fabrication process,
• wherein the product, in a region of fiber reinforcement and in a direction of a fiber symmetry axis, has a tensile modulus of ≥1.5 GPa as measured according to DIN EN ISO 527-1,
• wherein the product, in the region of fiber reinforcement and perpendicular to the fiber symmetry axis, has a tensile modulus of ≤1.2 GPa as measured according to DIN EN ISO 527-1,
• wherein the product, in the region of fiber reinforcement and perpendicular to the fiber symmetry axis, has a yield point of >5% as measured according to DIN EN ISO 527-1, and
• wherein the thermoplastic elastomer is selected from the group consisting of thermoplastic copolyamides (TPA), thermoplastic copolyesters (TPC), olefin-based thermoplastic elastomers (TPO), styrene block copolymers (TPS), urethane-based thermoplastic elastomers (TPU), crosslinked olefin-based thermoplastic elastomers (TPV), polyvinyl chloride (PVC)-based thermoplastic elastomers, silicone-based thermoplastic elastomers, or a combination of at least two of these thermoplastic elastomers.