Steel cord for reinforcing rubber article
AssigneeBridgestone Corporation
InventorYusuke Nozaki
Life of this patent
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Abstract
Provided is a steel cord for reinforcing a rubber article which can further improve cut resistance when applied to a tire while maintaining the amount of steel to be used. A steel cord for reinforcing a rubber article comprising: one core strand 11 having a two-layered layered-twisted structure formed by twisting a plurality of steel filaments 1; and a plurality of sheath strands 12 having a layered-twisted structure formed by twisting a plurality of steel filaments 2, wherein the sheath strands are twisted around the core strand. A ratio dc/ds of a diameter dc of a sheath filament constituting the sheath of the core strand to a diameter ds of an outermost layer sheath filament constituting the outermost layer sheath of the sheath strand is more than 1.25 and not more than 1.50.
Claims7
A steel cord for reinforcing a rubber article comprising:
- one core strand having a two-layered layered-twisted structure formed by twisting a plurality of steel filaments;
- and a plurality of sheath strands having a layered-twisted structure formed by twisting a plurality of steel filaments, wherein the sheath strands are twisted around the core strand,
- wherein a ratio dc/ds of a diameter dc of a sheath filament constituting the sheath of the core strand to a diameter ds of an outermost layer sheath filament constituting the outermost layer sheath of the sheath strand is more than 1.25 and not more than 1.50,
- wherein a number of layers of the layer-twisted structure of the sheath strands is 2 to 3, and
- wherein the number of the sheath strands is from 7 to 9.
Dependencies are inferred from the claim text.