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17-strand radial tire steel cord

A technology of steel cords and steel wires, applied in the field of 17-strand radial tire steel cords, which can solve the problems of ineffective penetration of rubber, small gaps, and high air content in cords, so as to increase service life, improve corrosion resistance, and avoid failure Effect

Pending Publication Date: 2020-01-31
JIANGSU XINGDA STEEL TYPE CORD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a 17-strand radial tire steel cord to solve the problem that in the prior art, the monofilaments of the outer layer strands of the steel cord are arranged tightly and the gaps are small, and the rubber cannot effectively penetrate into the core strand steel wires, which causes the inside of the cord. Technical issues with high air content

Method used

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  • 17-strand radial tire steel cord
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  • 17-strand radial tire steel cord

Examples

Experimental program
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Embodiment 1

[0027] In this embodiment, the diameters of the core strand 1 steel wire, the middle layer strand 2 steel wire and the outer layer strand 3 steel wire are all 0.20mm, as figure 1 shown. The lay distance of 2 steel wires in the middle layer is 10.0 mm, and the lay length of 3 steel wires in the outer layer is 16.0 mm, that is, the lay length of 2 steel wires in the middle layer is 10.0 mm. 0.625 times. The steel wire of the core strand 1 has no braiding and twisting, and the steel wire of the middle strand 2 and the steel wire of the outer strand 3 adopt the same twist direction, both of which are Z twist. In this embodiment, the steel cord 7+10×0.20ST structure is used for radial tires.

[0028] Table 1 is a comparison table of performance indicators between the 0.22+6+12×0.20HT structural steel cords commonly used in radial tires in the prior art and Example 1 of the present invention:

[0029] Table 1

[0030]

[0031]

[0032] figure 2 It is a schematic cross-se...

Embodiment 2

[0034] In the present embodiment, the diameters of the core strand 1 steel wire, the middle layer strand 2 steel wire and the outer layer strand 3 steel wire are all 0.225mm, as image 3 shown. The lay distance of the middle layer strand (2) steel wire twisting is 12.5mm, and the lay length of the outer layer strand 3 steel wire twisting is 18.0mm, that is, the lay length of the middle layer strand 2 steel wire twisting is the same as the outer layer strand 3 steel wire twisting twist 0.695 times the distance. The core strand 1 steel wire has no braiding and twisting, the middle layer strand 2 steel wire and the outer layer strand 3 steel wire adopt the same twist direction, both of which are Z twist. In this embodiment, the steel cord 7+10×0.225ST structure is used for radial tires.

[0035] Table 2 is a comparison table of performance indicators between the 3+9+15×0.225HT structural steel cords commonly used in radial tires in the prior art and the second embodiment of the...

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Abstract

The invention belongs to the technical field of steel cords, and discloses a 17-strand radial tire steel cord, which comprises a core strand, an intermediate layer strand and an outer layer strand, wherein the intermediate layer strand is formed by weaving and twisting six strands of steel wires around the core strand; the outer layer strand is formed by weaving and twisting ten steel wires aroundthe intermediate layer strand; the diameter of the core strand, the intermediate layer strand steel wire and the outer layer strand steel wire are the same, the twisting direction of the intermediatelayer strand steel wire is the same as that of the outer layer strand steel wire, and the lay length twisted by the intermediate layer strand steel wire is 0.50-0.80 time that of the lay length twisted by the outer layer strand steel wire; and the steel cord has a circular cross section. According to the 17-strand radial tire steel cord, the gap between the outer layer strand steel wires is large, so that rubber can be fully infiltrated into the intermediate layer strand steel wires, the corrosion resistance, fatigue resistance, impact resistance and adhesion retention of a tire are improved,and the service life of the tire is prolonged.

Description

technical field [0001] The invention belongs to the technical field of steel cords, in particular to a seventeen-strand radial tire steel cord. Background technique [0002] Steel cord is an important part of the frame material of radial tire, and the structure of 0.22+6+12×0.20 commonly used in radial tires﹙ figure 2 The steel cord of ) is braided and twisted by one steel wire of the core strand (A1), six steel wires of the middle layer strand (A2), and twelve steel wires of the outer layer strand (A3). The outer layer strand (A3) The monofilaments are closely arranged and the gaps are small, and the rubber cannot effectively penetrate into the steel wires of the middle layer (A2), resulting in a high air content inside the cord. The structure of the steel cord, its strength, bending stiffness, and adhesion to rubber have a direct impact on the tire, and only by controlling the production process of the steel cord cannot fully compensate for the defects due to unreasonable...

Claims

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Application Information

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IPC IPC(8): D07B1/06D07B5/00
CPCD07B1/0686D07B1/068D07B1/0606D07B5/005D07B2201/1036D07B2201/2009D07B2205/3025D07B2201/2006D07B2201/2024D07B2201/2025D07B2201/2039D07B2201/204D07B2201/2051D07B2201/2059D07B2401/2055D07B2401/2025D07B2401/2095D07B2501/2046D07B2801/10
Inventor 马卫铭张正裕刘湘慧王燕曹恒祥潘春东
Owner JIANGSU XINGDA STEEL TYPE CORD
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