| 摘要 |
A steel cord for the reinforcement of rubber articles comprises a core comprised of three steel filaments, a first sheath formed by twisting nine wave-formed steel filaments around the core, and a second sheath formed by twisting fifteen wave-formed steel filaments around the first sheath in a direction opposite to the twisting direction of the first sheath, in which a forming ratio F1 of each filament in the first sheath and a forming ratio F2 of each filament in the second sheath are within a range of 0.75-0.95, respectively, and satisfy Fi1<F2.
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