US 2021/0324177 A1Published application

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

AssigneeCovestro Intellectual Property GmbH & Co. KG

InventorsDirk Achten, Nicolas Degiorgio, Jonas Kuenzel, Thomas Buesgen

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Abstract

The present invention relates to a fibre-reinforced 3D-printed elastic product (1, 3, 4, 7, 10, 12), wherein the product comprises a weight proportion of ≥50% of a polymer having a mean molecular weight of ≥5000 g/mol, measured by means of GPC, and a weight proportion of ≥0.5% and ≤20% of one or more fibres having an aspect ratio of ≥100 and a length of ≥3 cm and ≤1000 cm, the product being produced at least in part by means of an FFF (Fused Filament Fabrication) method, and the product having a tensile modulus of ≥1.5 GPa in the region of the fibre reinforcement and in the direction of the fibre symmetry axis. The product also has a tensile modulus, measured according to DIN EN ISO 527-1, of ≤1.2 GPa in the region of the fibre reinforcement and perpendicular to the fibre symmetry axis, and has a yield strength of ≥5%, measured according to DIN EN ISO 527-1, perpendicular to the fibre symmetry axis.

Claims10

Dependent claims

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 having an aspect ratio of ≥100 and a length of ≥3 cm and ≤1000 cm,
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, and
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.

3 more elements

Dependencies are inferred from the claim text.