The present invention provides a metal cord having better adhesion to rubber compared to a conventional one, as well as a metal cord-rubber composite and a conveyor belt, including the same. In a metal cord (10) composed of a plurality of metal filaments (11) twisted together, the surfaces of the metal filaments (11) constituting the outermost layer are each provided with a zinc plating layer (16), and the degrees of crystal orientation of the (002) plane and the (102) plane of the surface of the zinc plating layer (16) are less than 120.

The present invention provides a metal cord having better adhesion to rubber compared to a conventional one, as well as a metal cord-rubber composite and a conveyor belt, including the same. In a metal cord (10) composed of a plurality of metal filaments (11) twisted together, the surfaces of the metal filaments (11) constituting the outermost layer are each provided with a zinc plating layer (16), and the degrees of crystal orientation of the (002) plane and the (102) plane of the surface of the zinc plating layer (16) are less than 120.

The present invention relates to a steel cord-rubber composite including a rubber composition and a steel cord, wherein the rubber composition is a rubber composition containing a rubber component, a filler, a thermosetting resin, a methylene donor, a thiuram-based vulcanization accelerator, and a sulfenamide-based vulcanization accelerator; the content of a cobalt compound is 0.01 parts by mass or less; and the steel cord is a steel cord subjected to ternary alloy plating. The steel cord-rubber composite improves not only the adhesiveness of the steel cord-rubber composite, particularly the adhesiveness after hygrothermal aging, but also improves the crack propagation resistance and the low fuel consumption of the pneumatic tire using this steel cord-rubber composite and favorably makes the both compatible with each other.

The present invention relates to a steel cord-rubber composite including a rubber composition and a steel cord, wherein the rubber composition is a rubber composition containing a rubber component, a filler, a thermosetting resin, a methylene donor, a thiuram-based vulcanization accelerator, and a sulfenamide-based vulcanization accelerator; the content of a cobalt compound is 0.01 parts by mass or less; and the steel cord is a steel cord subjected to ternary alloy plating. The steel cord-rubber composite improves not only the adhesiveness of the steel cord-rubber composite, particularly the adhesiveness after hygrothermal aging, but also improves the crack propagation resistance and the low fuel consumption of the pneumatic tire using this steel cord-rubber composite and favorably makes the both compatible with each other.

A steel cord that is suitable for reinforcing rubber articles such as tires. The inventive steel cord enables to completely eliminate the presence of cobalt in a tire when combined with the proper cobalt free compound. Advantageously the steel cord adheres equally well to rubbers containing organic cobalt salts. The inventive wire is different from prior art steel cords in that the brass coating now comprises iron particles. The iron particles have a size between 10 nm and 10 000 nm. The presence of iron mitigates the adhesion retention loss of the rubber to steel cord bond in a hot and humid environment. It is a further advantage that the inventive steel cord does not contain any intentionally added cobalt thereby contributing to the elimination of harmful substances in the production area as well as the environment.

A steel cord that is suitable for reinforcing rubber articles such as tires. The inventive steel cord enables to completely eliminate the presence of cobalt in a tire when combined with the proper cobalt free compound. Advantageously the steel cord adheres equally well to rubbers containing organic cobalt salts. The inventive wire is different from prior art steel cords in that the brass coating now comprises iron particles. The iron particles have a size between 10 nm and 10 000 nm. The presence of iron mitigates the adhesion retention loss of the rubber to steel cord bond in a hot and humid environment. It is a further advantage that the inventive steel cord does not contain any intentionally added cobalt thereby contributing to the elimination of harmful substances in the production area as well as the environment.

Provided is a steel cord for rubber article reinforcement which has excellent corrosion resistance and productivity without deterioration of adhesion with rubber. A steel cord (1) for rubber article reinforcement, in which plural steel filaments (2) are twisted together, includes: a core having at least one core filament (2c); and a sheath having at least one sheath layer formed by twisting at least one sheath filament (2s) around the core. In this steel cord (1), brass plating is performed on the steel filaments (2) and zinc plating is further performed on the outer circumference of the brass plating of the core filament (2c), and the steel filaments (2) have a diameter d of 0.1 mm to 0.6 mm.

Provided is a steel cord for rubber article reinforcement which has excellent corrosion resistance and productivity without deterioration of adhesion with rubber. A steel cord (1) for rubber article reinforcement, in which plural steel filaments (2) are twisted together, includes: a core having at least one core filament (2c); and a sheath having at least one sheath layer formed by twisting at least one sheath filament (2s) around the core. In this steel cord (1), brass plating is performed on the steel filaments (2) and zinc plating is further performed on the outer circumference of the brass plating of the core filament (2c), and the steel filaments (2) have a diameter d of 0.1 mm to 0.6 mm.

The present invention provides a metal cord having better adhesion to rubber compared to a conventional one, as well as a metal cord-rubber composite and a conveyor belt, including the same. In a metal cord (10) composed of a plurality of metal filaments (11) twisted together, the surfaces of the metal filaments (11) constituting the outermost layer are each provided with a zinc plating layer (16), and the degrees of crystal orientation of the (002) plane and the (102) plane of the surface of the zinc plating layer (16) are less than 120.

The present invention provides a metal cord having better adhesion to rubber compared to a conventional one, as well as a metal cord-rubber composite and a conveyor belt, including the same. In a metal cord (10) composed of a plurality of metal filaments (11) twisted together, the surfaces of the metal filaments (11) constituting the outermost layer are each provided with a zinc plating layer (16), and the degrees of crystal orientation of the (002) plane and the (102) plane of the surface of the zinc plating layer (16) are less than 120.