Method for testing adhesive force life of steel wire tire cord in radial tire

A radial tire and steel cord technology, which is applied in the field of tire performance evaluation, can solve the problems of tire adhesion life and cannot provide a reference basis, and achieve the effect of simple and easy operation of the experimental method, accurate experimental results and strong feasibility.

Inactive Publication Date: 2013-02-13
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing test analysis is to evaluate the status quo of tires by means of physical analysis, but no reference basis can be given for the tire's adhesive life

Method used

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  • Method for testing adhesive force life of steel wire tire cord in radial tire
  • Method for testing adhesive force life of steel wire tire cord in radial tire
  • Method for testing adhesive force life of steel wire tire cord in radial tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The radial distribution determination of the elements in the unaged brass steel cord of the present embodiment operates in the following steps:

[0024] In the radial distribution of the steel wire, we adopted the AES (Auger Electron Method) method to determine the elements and their composition. Auger electrons sputter electron current from the position shown in the figure, and carry out step-by-step analysis and detection from the surface to the axis center with every 5nm as a unit (that is, every 5nm as a layer), and the elements and their composition data of a layer every 5nm .

[0025] Figure 1(a) is the scanning electron microscope (SEM)-electron energy profile diagram of the steel wire. The measurement parameters are shown in the figure (the current size is 50eV, the sputtering area is 2mm*2mm, and the picture is a magnification effect picture of 400.0 times). Figure 1 (b) is the overall shape, (c) is the local shape, from which it can be seen that there is stil...

Embodiment 2

[0027] Use a flat vulcanizer to vulcanize the radial tire test sample at 155°C for 10 minutes, then place it in liquid nitrogen and cool it for 5 minutes, and immediately remove the rubber material by tapping with a hammer to obtain a steel cord sample. Dicumene was soaked at 60°C for 24 hours, dried in vacuum and left for testing and analysis.

[0028] Diisopropylbenzene is a rubber removal agent. After the rubber material is crushed, there will be a small amount of rubber on the steel wire. Dissolving the remaining rubber with diisopropylbenzene can obtain the steel cord after the rubber material is removed. It will affect the element content on the surface of the steel cord.

[0029] Figure 2(a), (b), (c), and (d) show the scanning electron micrographs of the steel cord obtained under the vulcanization condition at 155°C at magnifications of 500 times, 4000 times, 5000 times and 10000 times, respectively. At 5,000 and 10,000 times, there are a few white dots and flakes tha...

Embodiment 3

[0034] The steel cord sample prepared in Example 2 was placed in a polytetrafluoroethylene-lined autoclave, heated at 100°C and 120°C for 14 days in an electric thermostatic oven, and then scanned with a scanning electron microscope (SEM) and X Energy dispersive spectroscopy (EDS) was used to analyze the aging of the interface of the sulfide layer.

[0035]The higher the aging temperature, the faster the rate of decrease in the adhesion will be. The main reason is that the higher the temperature, the faster the reaction rate of copper, zinc and sulfur is. Figure 3(a) and (b) are scanning electron micrographs of the steel cord samples after vulcanization in Example 3, which were thermally aged at 100°C and 120°C for 14 days, respectively. It can be seen from the figure that the thermal aging at 120°C is obvious It is faster than the thermal aging at 100°C, and a large amount of copper and zinc sulfides have appeared on the surface. Table 2(a) and (b) respectively represent the...

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Abstract

The invention discloses a method for testing adhesive force life of a steel wire tire cord in a radial tire. The method comprises the following steps of: sulphurizing an unused radial tire and then removing size to obtain the steel wire tire cord, carrying out thermal ageing treatment on the obtained steel wire tire cord, then carrying out an ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectroscopy) test, an EDS (Energy Disperse Spectroscopy) test and a breakage drawing force test on a sample, and drawing a standard curve according to test data; removing size on a radial tire sample to be tested to obtain the steel wire tire cord, wherein the radial tire sample to be tested has the same formula with the radial tire used when the standard curve is drawn, then carrying out the ICP-AES test, the EDS test and the breakage drawing force test on the obtained steel wire tire cord, and determining a position of the sample to be tested in the standard curve according to the breakage drawing force and data used for correcting sulphur content and zinc simple substance content. In the testing method disclosed by the invention, relation between simple substance metal content and the adhesive force life is found by adopting a chemical analysis method, thus the adhesive force life can be judged and evaluating basis is provided for judgement analysis of tire fault.

Description

1. Technical field [0001] The invention relates to a method for evaluating tire performance, in particular to a method for evaluating the adhesive life of steel cords in radial tires. 2. Background technology [0002] With the development of the tire industry, the proportion of radial tires is getting higher and higher. Due to its excellent performance and cost-effective advantages, steel cord has become an important framework material for radial tires. The belt layers of all radial tires must use steel cords as the skeleton material, especially in all-steel truck radial tires, the skeleton materials are all steel cords. The surface of the steel cord is plated with brass, on the one hand, it is beneficial to the adhesion of the steel cord to the rubber; on the other hand, it is also conducive to the drawing of the steel wire to obtain a smaller single wire diameter. [0003] For a long time, the steel cords used in all-steel radial tires in my country have been dominated b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/22G01N23/00G01N23/227G01N3/00
Inventor 陈春年伏文周倩
Owner HEFEI UNIV OF TECH
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