Steel cord for reinforcement of a radial tire and a radial tire employing the same
AssigneeHankook Tire Co., Ltd.
InventorYong Sik Han
Life of this patent
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Abstract
A steel cord for reinforcement of a radial tire and a radial tire employing the same are disclosed. The steel cord is made of more than three steel filaments of which one or two filaments are regularly twisted, the other filaments are open-twisted and each filament is twisted in same direction. Each steel filament using carbon steel has the carbon content of 0.7 to 0.96 wt %, the tensile strength of the filament is in the range of 260 to 380 kgf/mm2, the twisting pitch is 10 to 20 mm, and each filament is plated with brass. The topping characteristic is improved and the uniformity of tire is enhanced.
Claims3
A steel cord for reinforcement of a radial tire wherein said steel cord is made of three steel filaments of which two filaments having 90-120% of shape maintenance property respectively within 5% difference are open-twisted, one filament having 70-90% of shape maintenance property is regularly twisted and each filament is twisted in the same direction.
Dependencies are inferred from the claim text.