PNEUMATIC RADIAL 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 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 frame web consists of a single layer of rubberized metal cord. In the carcass, a metal cord of the structure 12L20 NT with a thickness of the rubberized layer of the metal cord (1.9÷2.1) ±00.03 mm, a steel cord diameter of 0.75±00.04 mm, a linear density of the metal cord of 2.47-2.51 g/m and the breaking force of the metal cord as a whole is not less than 950 N, the elongation at break is not less than 1.3%, the pitch of the metal cord in the rubberized frame fabric is 1.4-1.7, in the layers of the cord of the finished tire with the number of steel cord threads per 100 mm basis 59÷71 pieces. The steel cord has a construction of 3×0.20+9×0.175 NT and is made of high-strength metal threads of different diameters 0.20±0.01 mm and 0.175±0.01 mm with a brass coating weighing 4.7±0.9 g/ kg and a mass fraction of copper in a brass coating of 63.5±2.5%, twisted together according to the “S” type with a step of 9-11 mm, using carcass rubbers that ensure the bond strength of the metal cord with carcass rubber of at least 380 N/12 .5 mm.

EFFECT: improving tire performance.

1 cl, 2 dwg, 2 tbl