N-layer intensive reinforced steel cord

Abstract

The invention discloses an N-layer intensive reinforced steel cord which comprises a core strand steel wire, at least five second-layer strand steel wires, at least ten third-layer strand steel wiresand at least fifteen outer-layer strand steel wires. The second-layer strand steel wires are evenly distributed on the periphery of the core strand steel wire and twisted along the core strand steel wire; the third-layer strand steel wires are uniformly distributed on the periphery of the second-layer strand steel wires and are twisted along the second-layer strand steel wires; and the outer-layerstrand steel wires are uniformly distributed on the periphery of the third-layer strand steel wires and are twisted along the third-layer strand steel wires. The gaps among the outer-layer strand steel wires are large, so that rubber can fully permeate into the third-layer strand steel wires; and the gaps among the third-layer strand steel wires, the second-layer strand steel wires and the core strand steel wire are small, so that the air content in the steel cord is reduced, point contact friction among the steel wires due to the fact that enough rubber does not permeate into the steel cordis avoided, and then the problem that the bearing capacity of the steel cord fails due to abrasion is avoided.

Description

technical field [0001] The invention relates to the technical field of steel cords, in particular to an N-layer intensive reinforced steel cord. Background technique [0002] Steel cords are an important part of the framework material of radial tires. In the prior art, steel cords with a structure of 3+9+15×d are commonly used in radial tires, which consist of core strand steel wire 1, middle layer strand steel wire 5 and outer layer strand steel wire. 4 braided twists, core strand steel wire 1, middle layer strand steel wire 5 and outer layer strand steel wire 4 have the same diameter, ﹙3+9+15﹚×d structural twist direction is ZZZ, lay length is 5.0 / 10.0 / 16.0mm or 6.3 / 12.5 / 18.0mm, the steel wires 4 of the outer layer are closely arranged, the gap between the steel wires is small, and the rubber cannot effectively penetrate into the steel wire 1 of the core strand, resulting in high air content inside the steel cord. The structure of the steel cord, its strength, bending st...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an N-layer dense reinforced steel cord to solve the problem of insufficient strength of the steel cord in the prior art, the small gap between the steel wires of the outer layer, and the inability of the rubber to penetrate into the steel wires of the core strands effectively, causing the steel cord to The problem of high air content inside the line

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