PNEUMATIC RADIAL CAR TIRE Russian patent published in 2022 - IPC B60C9/08 B60C9/22 

FIELD: car tires.

SUBSTANCE: invention relates to pneumatic passenger car tires of radial design, the maximum load of which is not less than 800 kg and not more than 1450 kg, and the maximum allowable operating speed of which is more than 170 km/h (speed category R, ​​S, T and more). The rubberized carcass fabric of the tire consists of a single layer of rubberized metal cord. In the carcass of the tire, a steel cord of the structure 11L14 ST was used with a thickness of the rubberized layer of the steel cord (0.9÷1.1) ±0.03 mm, a steel cord diameter of 0.58±0.05 mm, a steel cord linear density of 1.32-1.36 g/m and the breaking force of the metal cord as a whole is not less than 580 N, the relative elongation at break is not less than 1.5%, the pitch of the metal cord in the rubberized frame fabric is 1.11-1.25. In the layers of the tire cord, the number of steel cord threads per 100 mm on the warp is 80÷90 pieces. The steel cord has a structure of 3+8×0.14 ST and is made of high-strength metal threads of the same diameter 0.14±0.01 mm with a brass coating weighing 4.6±1.0 g/kg and a mass fraction of copper in the brass coating 63.5±2.5%, twisted among themselves according to the “S” type with a steel cord lay pitch of 10.0±0.5 mm and a core lay pitch of 5±0.25 mm, using carcass rubbers that ensure the strength of the metal cord bond with the carcass rubber not less than 300 N/20.0 mm.

EFFECT: improving tire performance.

1 cl, 2 dwg, 2tbl