Method for conveniently detecting dispersity of cobalt salt in sizing material

Abstract

The invention discloses a method for conveniently detecting the dispersity of cobalt salt in a rubber material. The method comprises the following steps: (1) polishing a sample to be detected until the distance between a steel wire cord and the surface of the rubber material is 0.05-0.5 mm; and (2) stripping the steel wire cord along the polished surface of the rubber material through tension detection equipment, observing the surface state of the stripped steel wire cord and a tension value displayed by the tension detection equipment, if the tension value is greater than a preset value and the dew point of no rubber on the surface of the steel wire cord is less than 2, indicating that the adhesive force of the rubber material is qualified, otherwise, indicating that the adhesive force of the rubber material is unqualified. According to the method, the steel wire cord is stripped from the surface of the rubber material, the expression mode is consistent with that of stripping of the rubber material and the steel wire cord in the tire U-shaped explosion, and the rubber material problem can be well represented.

Description

technical field [0001] The invention belongs to the technical field of adhesive properties of rubber materials, and in particular relates to a method for conveniently detecting the dispersibility of cobalt salts in rubber materials. Background technique [0002] According to some quality problems in the current all-steel radial tire market, the U-shaped explosion problem still occupies a relatively large share. No glue, according to its appearance characteristics, it shows that the rubber material and the steel cord are not well bonded, and the dispersion of the cobalt salt will directly reflect the adhesion between the steel cord and the rubber material. The better the dispersion, the better the bonding effect. it is good. [0003] The adhesion between the rubber material and the steel cord, that is, the dispersion of cobalt salt in the material, is the main performance index of the carcass and belt layer of the skeleton material. At present, there are mainly two detectio...

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Problems solved by technology

At present, there are mainly two detection methods for the adhesion between the rubber material and the steel cord. One detection method is as follows: figure 1 As shown, the method is to use a tensile machine to draw the steel cord 6 from one end of the rubber material 7 at a constant speed, and analyze the adhesion between the rubber material 7 and the steel cord 6 by collecting the data when the tensile machine is working. In the method, the extraction method of the steel cord is inconsistent with the performance of the peeling of the tire U-shaped rubber and the steel cord, which cannot characterize the rubber problem well; another detection method is to use energy spectroscopy to analyze the cobalt in the rubber. However, because the content of cobalt in the glue is very small, accounting for only about 0.3% of the total weight of the formula, the test results fluctuate greatly, and the reference is low. For example, 30 samples from the same car are used to analyze the The content of cobalt in the rubber is tested, and the test results are as follows figure 2 shown by figure 2 It can be seen that the detection data fluctuates greatly, and the reference of the data detected by this method is low, and more sophisticated instruments are needed for analysis, but the cost of precision instruments is too high to realize field application

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