| 摘要 |
PROBLEM TO BE SOLVED: To efficiently produce a steel cord providing higher durability. SOLUTION: A tension of 0.5-5.0 kg is applied to one steel core wire 14 and a lubricant in an amount of 10-500 mg per kg of the two core wires 14 is applied thereto to twist 5-7 sheath wires together by a strander body 20. Thereby, dispersion of the surface conditions in the longitudinal direction of the core wires can be absorbed and the core wires can smoothly be passed through guides installed in the interior of the strander body 20 with good lubricity. Thereby, the tension when twisting the sheath wires together is stabilized. Twisting properties can be stabilized and wire breakage can be suppressed. Since the twisting properties of the resultant steel cord 26 are stabilized without wire breakage, the high durability can be afforded by using the steel cord in a belt-reinforcing material of a pneumatic tire. COPYRIGHT: (C)2008,JPO&INPIT
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