Composite materials based on oriented orthotropic fiber mixtures for imparting mechanical coupling

A tread comprising a tread pattern, said tread pattern comprising a composite material based on an elastomeric matrix, a crosslinking system, a reinforcing filler and short fibers,

• wherein the short fibers have a thickness within a range extending from 5 to 40 μm, a length within a range extending from 0.5 to 10 mm, and a Young's modulus within a range extending from 0.5 to 800 GPa,
• wherein the short fibers are present in the elastomeric matrix at a concentration within a range extending from 5 to 30 parts by weight per hundred parts by weight of elastomer, phr,
• wherein the short fibers are oriented in circumferential planes according to the same angle α expressed in degrees relative to the radial plane, the angle α being defined by the formula α=45+/−x, in which x is within a range extending from 10 to 30,
• wherein the tread pattern is composed of a plurality of parallel layers adjacent to one another, and
• wherein the layers of the plurality of layers are oriented in the tread pattern parallel to the plane defined by the orientation of the short fibers in the tread pattern and the axial direction.