| 摘要 |
<p>PURPOSE: A steel cord having a flat structure close to a two-dimensional configuration by compressing the porosity of a three-dimensional configuration present in a steel cord is provided. Therefore, it has a high breaking load and sufficient rubber penetration, ensures the steering stability and improves workability. CONSTITUTION: The steel cord has a breaking elongation of 5% or more and is a flat cord(5) with a flatness ratio of 1.10 to 2.0, which is obtained by cold rolling of an open single-strand steel cord having an 1xn(n:number of element wires) structure. The number of element wires(5A) is 3 to 6 strands, the diameter of each element wires is 0.15 to 0.4mm, the twist pitch of the steel cord is 10 to 40 times the diameter of the element wires, and the spiral twist direction of the steel cord is an S twist or a Z twist.</p> |
