| 摘要 |
<p>PURPOSE: A reinforcing steel cord for rubber products such as steel belted radial tires or conveyor belts having improved rubber penetration and ageing adhesive force to rubber material by improving the mechanism of a twisted core to minimize the continuous contact of the core and external wires and forming sufficient interspaces between the core and the external wires is provided, which is most preferably used as a reinforcing material for steel belted radial tires. CONSTITUTION: In the steel cord, the pitch of the twisted core is set to allow the core to be twisted 0.2 to 2 times within the pitch of the cord, thus preferably forming sufficient interspaces between the core and the external wires in addition to the interspaces between the external wires. Since the rubber material is completely filled in the steel cord due to such interspaces, the steel cord is remarkably improved in buckling fatigue resistance, rubber penetration, air permeability, rubber adhesive force, ageing adhesive force relative to rubber, protection of brass coated surfaces of wires, and workability during a process of producing rubber products.</p> |
