PNEUMATIC RADICAL CAR TIRE Russian patent published in 2023 - IPC B60C9/00 

FIELD: automobile pneumatic passenger tires.

SUBSTANCE: automobile pneumatic passenger tires of radial design. Maximum load of the tires does not exceed 925 kg. The pneumatic tire consists of a tread, a carcass made of textile cords, sidewalls, a rubberized breaker bracelet consisting of one or two textile layers and two layers of rubberized metal cord, a sealing layer and a technological layer, as well as a side part, which in turn consists of bead rings obtained by assembling individual rubber-coated bronzed wires of 0.89 BP grade. The tire is distinguished by the assembly of bead rings from individual bronzed wires into a strand with a step exactly in the center, heating and rubberizing the wire in the insulating head of the pin extruder. The bead ring is made of high-strength wire of the same diameter 0.89±0.02 mm, linear density 4.89±0.34 g/m, breaking load of at least 1350 N, with a bronze coating weighing 0.5±0.2 g/kg and the mass fraction of tin in the bronze coating being 1.25±0.75%, with the bond strength of the wire with the industrial rubber compound of at least 152 N/12.5 mm.

EFFECT: improvement in the overall performance of the tire.

1 cl, 2 dwg, 1 tbl