| 摘要 |
PURPOSE:To improve riding comfortableness, in the titled tire for an automobile, by specifying the dynamic modulus of elasticity of the outside rubber layer forming the tread parts and the loss tangent of the inside rubber layer respectively, and by interposing an organic fiber layer with a specific cord orientation between a belt layer and a carcass. CONSTITUTION:The dynamic modulus of elasticity E' of the outside rubber layer 6 forming tread parts 3 and the loss tangent tandelta of the inside rubber layer 7 are set to be E'<=50kg.f/cm<2> and tandelta>=0.4 respectively. Further, between a belt layer 5 and a carcass 4, an organic fiber layer 10, for example, a nylon cord formed into a rubber sheet is interposed so that the cord angle beta thereof for the cord angle alpha of the belt layers 5 is made to be -alpha+ or -4 deg.. By this constitution, the lessening performance in impact due to the unevenness of a road surface and the vibrational damping performance can be enhanced, faciletating the improvement in riding comfortableness to be accomplished. |
