Tire comprising reinforcing elements in the form of laminated strips
AssigneeCompagnie Generale Des Etablissements Michelin
InventorGAEL PATAUT
Life of this patent
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Abstract
The tire comprises a crown reinforcing zone comprising a ply of strips, each forming an angle of less than or equal to 10° with the circumferential direction. Each reinforcing strip is formed by a laminate made up of n inner composite layers comprising low-modulus oriented fibres parallel to each other, the angle of which with the circumferential direction is, in absolute terms, less than or equal to 10°, together with m outer composite layers on either side of the inner composite layers, comprising high-modulus oriented fibres parallel to each other, the angle of which with the circumferential direction is, in absolute terms, strictly greater than 10°. The high- and low-modulus fibres are coated with a polymer matrix.
Claims16
-15. (canceled)
A tire comprising a carcass ply connecting two beads via two sidewalls, the carcass ply being surmounted radially toward an outside of the tire by a crown reinforcing zone which is itself surmounted radially toward the outside of the tire by a tread, the crown reinforcing zone comprising a plurality of reinforcing strips arranged in at least one ply of reinforcing strips, the reinforcing strips of each ply being arranged so that they are juxtaposed axially and each forms an angle of less than or equal to 10° with the circumferential direction, and the circumferential direction corresponding to a periphery of the tire and being defined by a direction of running of the tire,
- wherein each reinforcing strip is made up of a laminate consisting of n>1 inner composite layer or layers,
- wherein if n>1, the inner composite layers are juxtaposed radially with each other, each inner composite layer comprising oriented fibers parallel to each other, the angle of which to the circumferential direction is less than or equal to 10° in absolute terms, the oriented fibers of each inner composite layer having a modulus of extension of less than or equal to 30 GPa and being coated with a polymer matrix, and the inner composite layer or layers being framed radially on either side, respectively, by m≥1 outer composite layers,
- wherein if m>1, the outer composite layers are juxtaposed radially with each other on either side of the inner composite layer or layers, each outer composite layer comprising oriented fibers parallel to each other, the angle of which with the circumferential direction is greater than 10° in absolute terms, and the oriented fibers of each outer composite layer having a modulus of extension greater than or equal to 55 GPa and being embedded in a polymer matrix.
Dependencies are inferred from the claim text.