The semi-steel radial tire is a new type of tire in which the carcass cords are arranged in the meridian direction, and the buffer layers are arranged circumferentially or close to the circumferential direction to tightly hoop the carcass. It consists of six main parts: tread, carcass, sidewall, buffer layer (or belt), bead, inner liner (or inner liner).
Due to the scientific and reasonable structure, the radial tires have improved the force and have many excellent performances than the diagonal tires.
(1) Long service life. Since the radial tire tread and the carcass ply have a relatively rigid belt layer, when the tire rolls on the road surface, the circumferential deformation is small and the relative slip is small. Moreover, due to the large radial elasticity of the tire body, the ground contact area of the tire is increased and the pressure is reduced, so that the tread wear resistance is strong, and the puncture resistance is not easy, and the mileage can be 30% more than that of the ordinary diagonal tire.
(2) The rolling resistance is small and the fuel consumption is low. Due to the small number of radial tire plies, low running temperature, fast heat dissipation, and small circumferential deformation, the rolling resistance is 15%-20% smaller than the ordinary diagonal tire, and the sliding distance is about 25%. Therefore, the use of radial tires is not only It can improve the speed of the car and improve the fuel economy of the car (generally reducing fuel consumption by 5%-12%).
(3) Large carrying capacity. Since the arrangement of the radial tire cords is consistent with the main deformation direction of the tire, the cord strength is fully and effectively utilized, so that the load capacity of the ordinary diagonal tire is more than 10%. For example, the domestic 9.00-20 radial tire with only one layer of steel cord has a carrying capacity of 1800 KG, while the same type of diagonal tire with 10 layers of cotton cord has a bearing capacity of only 1500 KG.
(4) Good shock absorption performance. The factor mid-tire carcass has large radial elasticity and large radial deformation (perpendicular to the ground direction), which can alleviate the impact of uneven road surface, improve the car's smoothness, ride comfort, and reduce the possibility of damage to the vehicle. To help extend the life of the vehicle.
