| 摘要 |
The described tyre, particularly adapted for cars, is provided with belt strips (7, 8) each consisting of a first and a second series of cords (7a, 7b, 8a, 8b) made of different materials, alternated with each other according to a preestablished sequence. The cords (7b, 8b) of the second series, made of aramid for example, cooperate with those of the first series (7a, 8a), made of steel, to withstand tensile stresses in the longitudinal direction. Conversely, the cords (7b, 8b) of aramid have a greater compliance than the steel cords (7a, 8a) towards the compressive stresses. The elastomer incorporating the cords (7a, 7b, 8a, 8b) is filled with reinforcing fibres, short aramid fibres or aramid pulp for example, and has a modulus of elasticity included between 15 and 50 MPa, to prevent breakages of the metallic cords (7a, 7b) by effect of buckling loads. <IMAGE> |
