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Metal cord thread and rubber tire

A metal cord and cord technology, applied in tire parts, reinforcement layers of pneumatic tires, transportation and packaging, etc., can solve the problems of service life discount, easy breakage of steel cords, influence of breaking tension, etc., and achieve fracture extension. High rate and structural elongation, improved adhesive performance, and the effect of satisfying full adhesive performance

Active Publication Date: 2015-02-11
NV BEKAERT SA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, the structural elongation (2.25%) of the traditional high-strength steel cord structure 3×7×0.20mm cannot meet the requirements for the preparation of ultra-wide tires. If a higher structural elongation is obtained, the steel cord is easily broken. Even if it does not break by luck, the mechanical properties of the steel cord itself, such as fatigue and breaking force, will be greatly affected, and the service life will be greatly reduced.

Method used

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  • Metal cord thread and rubber tire

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Embodiment Construction

[0037] The test method of structural elongation and elongation at break of steel cord in the present invention is as figure 1 shown. exist figure 1 Among them, the curve 110 is the tensile curve of the steel cord, by figure 1 It can be seen that 110 first undergoes the structural deformation stage of the steel cord and then enters the elastic deformation stage; 120 is the elastic modulus line (take any two points c and d in the elastic deformation stage of the tensile curve 110, and the straight line connecting the two points is the elastic modulus line 120); the intersection point of the reverse extension line of 120 and the abscissa is denoted as δ1; 130 is the structural deformation regression line (take any two points a and b in the structural deformation stage of the tensile curve 110, and connect the two points. That is, the structural deformation regression line 130); the intersection point of the reverse extension line of 130 and the abscissa, denoted as δ 0 . |δ ...

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Abstract

The invention discloses a metal cord thread. The metal cord thread is made of a plurality of strands twisted according to the twisting length of the cord thread, each strand is composed of a plurality of metal wires according to the twisting length of the strands, elongation at break of the metal cord thread is not smaller than 5%, the strands have a strand twisting angle and the metal cord thread has a cord thread twisting angle. The sum of the strand twisting angle and the cord thread twisting angle ranges from 20 degrees to 29 degrees, the structural elongation of the metal cord thread is not smaller than 2.0%; when the sum of the strand twisting angle and the metal cord thread twisting angle ranges from 30 degrees to 38 degrees, the structural elongation of the metal cord thread is not smaller than 2.5%; when the sum of the strand twisting angle and the metal cord thread twisting angle ranges from 39 degrees to 48 degrees, the structural elongation of the metal cord thread is not smaller than 3.0%. Preferably, the structural elongation of the metal cord thread is not larger than 4.0%. The metal cord thread has the advantages of high elongation at break, high structural elongation and high rubber permeability. The invention further relates to a rubber tire comprising the metal cord thread.

Description

technical field [0001] The present invention relates to a metal cord, and also to a rubber tire comprising the metal cord. Background technique [0002] It is well known that the use of steel cords to reinforce rubber products, especially tire products, is used in a wide range of applications. "High elongation steel cord", as a member of the steel cord family, is generally used to reinforce the zero-degree belt and protective layer of tires. The so-called "high elongation steel cord" generally means that the elongation at break of the steel cord is not less than 5%. Elongation at break (δ) is one of the indicators describing the plastic properties of materials. The elongation at break is the percentage of the ratio of the total deformation ΔL of the gauge section after tensile fracture to the original gauge length L: δ=ΔL / L×100%. The elongation at break of a steel cord includes the structural elongation of the steel cord itself, e.g. for a "high elongation steel cord", wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D07B1/06B60C9/18
CPCB60C9/18D07B1/0613D07B2201/1076D07B2201/2009D07B2201/2011D07B2205/3053D07B2205/3071D07B2205/3089D07B2801/10D07B2801/18
Inventor 王贺R·德斯皮格拉雷朱宏桢
Owner NV BEKAERT SA
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