| 摘要 |
PROBLEM TO BE SOLVED: To provide a belt cord which improves the adhesiveness of the belt cord constituting a belt to a rubber on the vulcanization or employment of a tire, and to provide a vehicle tire. SOLUTION: The belt cord includes brass-plated steel wires in which laminated structure portions formed by laminating amorphous portions having a composition comprising 55 to 66 wt.% of Cu and the remainder of Zn and formed from crystal particles having a particle diameter of not more than 20 nm to crystalline portions including crystal particles having a particle diameter of less than 20 nm are formed, wherein the rate of the area occupying the surfaces of the amorphous portions of the laminated structure portion per the total surface of the brass-plated layers is not less than 20%; the rate of the volume occupied by the amorphous portions to the total volume of the laminated structure portion is not less than 20 and not more than 80%; the brass-plated steel wires are applied to 50% or more of the outermost sheath filaments in a layer-twisted structure, and to 50% or more of the outermost layer sheath filaments of the outermost strands in the multitwisted structure. The belt cord is applied to a vehicle tire. COPYRIGHT: (C)2011,JPO&INPIT |
