| 摘要 |
PURPOSE:To make it possible to reduce the noise and to raise the durability of a tire, by combining polyester cord plies and nylons cord plies with each other. CONSTITUTION:In a tread 1, a braker 3 is set as it surrounds the outer circumference of a carcass cord layer 2, and a shoulder part 6 is set on the upper part of a pair of right/left side wall parts 5. The carcass cord layer 2 is formed with groups 2a, 2b of carcass play, each of them is formed by laminating with 4-6 plies, and at least one of the plies is a nylons cord ply or a polyester cord ply. As the combination order of these plies, it is not necessary to arrange the plies regularly, such as arranging a polyester cord after a nylon cord. It is desirable that the strength of the nylon cord is 10-35kg/cord, and the strength of the polyester cord is 10-25kg/cord. |
