PNEUMATIC RADIAL TIRE FOR PASSENGER CAS AND LIGHT TRUCKS Russian patent published in 2023 - IPC B60C9/00 

FIELD: pneumatic tires.

SUBSTANCE: invention relates to automotive pneumatic tires of radial design, the maximum allowable operating speed, which is more than 190 km/h (speed category H, V, W and more). The tire consists of a tread, a carcass made of textile cords, sidewalls, bead rings, a rubberized breaker bracelet consisting of two layers of rubberized metal cord and a textile cord. In the breaker bracelet, one to two rubberized shielding layers are used, consisting of monofilaments of polymer polyamide of the NY 66 structure, 1400 dtex, with an impregnated thread thickness of 0.41±0.03 mm, breaking strength of cord thread not less than 108 N, number of thread twists 145±7 turns per 1 m with Z twist direction, 8.2 elongation± 0.6% at a load of 45 N, mass fraction of impregnating composition 3.5±0.5% and bond strength of the cord thread with the production rubber compound of at least 56 N/9.5 mm. The ratio of the thread thickness to the thickness of the rubberized shielding tape is 0.50-0.52, and the pitch of the threads in the shielding layer is 0.9±0.09.

EFFECT: improvement in the operational characteristics of the tire.

1 cl, 3 dwg, 1 tbl