The stability of the rubber conveyor belt is crucial fo […]
The stability of the rubber conveyor belt is crucial for industrial production. A stable rubber conveyor belt can not only improve the production efficiency of the enterprise, but also reduce the maintenance cost of the conveyor. So what factors affect the stability of the rubber conveyor belt?
1. The influence of mixing the number of thin passes
Natural rubber is a substance that is prone to oxidative degradation. The free-chain part of a macromolecular chain that has only one or two points of adsorption may exist outside the glassy and sub-glassy layers. When this part of the rubber molecular chain is thinned, it will also produce mechanical chain scission and oxidative chain scission. This chain scission may cut off the connection to the adsorption point, which will reduce the amount of glue.
2. The rubber conveyor belt is affected by the specific surface area of carbon black.
The binder increases almost in proportion to the specific surface area of the carbon black. As the specific surface area of the carbon black increases, the adsorption surface area increases, and the adsorption amount increases, that is, the bound rubber increases.
3. The impact of aging time
Tests have shown that after mixing, as the parking time increases, the amount of bound glue increases, and tends to balance after about one week. Because solid carbon black does not adsorb solid rubber macromolecules as easily as solid fillers adsorb gas or small molecules. In addition, the chemisorbed portion is slower and takes a certain amount of time.
4. The impact of rubber properties
The amount of bonding glue is related to the degree of unsaturation and molecular weight of the rubber, and the rubber having a high degree of unsaturation and a large molecular weight produces a plurality of binders.
5 .The impact of temperature
The blended pattern is placed at different temperatures for a certain period of time and the amount of bound glue is measured. As the treatment temperature increases, that is, the adsorption temperature increases, and the amount of combined glue increases, this phenomenon is consistent with the general adsorption law. Contrary to the above phenomenon, the effect of the kneading temperature on the bonding gel is that the higher the kneading temperature, the less the bonding gel. This may be because the temperature rises, the rubber becomes soft and is not easily broken by mechanical force to form macromolecular radicals, and carbon black is not easy to generate chain breaks to form free radicals in such a soft rubber environment, so when the rubber is melted at a high temperature. The bond formed by this action will be less than the glue at low temperatures.