Patent ID: 8991457
Filing Date: 2015-03-31
Classification: B60C,D07B,Y10S

Abstract:
1. A steel cord for reinforcement of rubber articles, having a multi-twisted structure in which a plurality of strands are twisted together, said strands having a layered twisted structure in which a plurality of steel filaments are twisted together, wherein dc/ds, which represents the ratio between dc, the diameter of each outermost layer sheath filament constituting the outermost layer sheath of a core strand, and ds, the diameter of each outermost layer sheath filament constituting the outermost layer sheath of sheath strands, is 1.05 to 1.25, wherein said core strand consists of a core, a first sheath, and a second sheath, and said sheath strands consist of a core and a first sheath, wherein the number of said core strand is only one, wherein the twist angle of the sheath strand, among said strands, is not less than 1.4 rad, and wherein the core strand has a structure of 3+9+11 filaments.