Patent ID: 8601782
Filing Date: 2013-12-10
Classification: B60C,D07B

Abstract:
1. A steel cord for reinforcing a rubber article with a multi-twisted structure formed by twisting a plurality of sheath strands formed by twisting a plurality of wires around a core strand formed by twisting a plurality of wires, and the core strand and the sheath strands being constituted of an at least 2-layer-twisted structure formed by twisting core wires and sheath wires respectively, wherein the diameter of an outermost wire of the core strand (φ1) (mm), the diameter of an outermost wire of the sheath strand (φ2)(mm), the center distance between the core strand and the sheath strand (r)(mm), the cross section of the sheath strand (S)(mm wherein (cd) stands for the cord diameter (mm), (sd) for the sheath strand diameter (mm), and (sp) for the sheath strand pitch (mm); satisfy the relationship represented by the following formula: