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Stee-made tyre cord of radial tyre

A technology for radial tires and cords, applied in the field of steel cords for radial tires, can solve the problems of reducing tire service life, accelerating cord corrosion, etc., and achieves the effect of less wear

Inactive Publication Date: 2004-12-08
HANKOOK TIRE WORLDWIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, cord corrosion caused by moisture or salt damage is accelerated, which greatly reduces the service life of the tire

Method used

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  • Stee-made tyre cord of radial tyre
  • Stee-made tyre cord of radial tyre

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Experimental program
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Effect test

Embodiment Construction

[0022] Referring to Figure 1, there is shown a steel cord having a construction according to the present invention.

[0023] As shown in FIG. 1, the steel cord includes a core layer 1 composed of two twisted filaments 1a, and a core layer 1 arranged around the core layer 1 and composed of five twisted filaments 2a. Strand layer 2. According to the invention, the filaments 1a and 2a are made of carbon steel in which the carbon content is 0.70% to 0.96% by weight. In order to obtain an improved adhesion to rubber, the filaments 1a and 2a are plated with brass. The filaments 1a in the core layer 1 and the filaments 2a in the strand layer 2 have the same twist pitch and the same twist direction. Preferably, the twisting pitch has a length ranging from 10 mm to 22 mm. It is also preferable that the filaments 1a and 2a in the core layer 1 and the strand layer 2 have a thickness of 260kgf / mm before twisting the filaments to form a steel cord. 2 ~385kgf / mm 2 of tensile strength. ...

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Abstract

A steel cord for radial tires having a "2+5" construction structured by twisting a core and a strand in such a fashion that they have the same twist pitch length and the same twist direction, so that the number of processing steps for the twisting process is reduced from two to one, thereby reducing the manufacturing costs while achieving an improvement in productivity.

Description

technical field [0001] The present invention relates to steel cords for radial tires, and in particular to a steel cord for radial tires having the construction comprising a "2+5" bi-directional The twisted (twist) pitch and the same twisted direction are formed by twisting a core wire (core) and a strand (strand) in such a way that the number of processing steps for the twisting process is reduced from 2 to 1, thereby reducing the manufacturing cost while obtaining an improvement in productivity. Background technique [0002] In a steel cord with a two-ply twisted structure, a core wire constituting the first layer of the steel cord and a strand constituting the second layer of the steel cord are usually within the twist pitch length and twist The orientation aspects differ from each other as follows: [0003] -Steel cord structure: 1×3(0.20)+6(0.35) [0004] - Twisted pitch length of the core wire: 10mm [0005] —Twist pitch length of strands: 18mm [0006] —Twisting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C9/00B60C15/06D07B1/06
CPCD07B2201/2024D07B2501/2046D07B1/062D07B2201/2023D07B2201/2028D07B2201/2061Y10S57/902D07B2201/2025D07B2205/3089D07B2201/2006D07B2201/2029D07B2801/12D07B2801/18B60C9/00
Inventor 韩瑢埴
Owner HANKOOK TIRE WORLDWIDE
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