The so-called activated rubber powder is a reactive elastic powder prepared by surface activation treatment of vulcanized rubber powder, and has a wider application range in rubber products; a rubber product containing natural rubber as a main material is mixed with an appropriate amount of activated rubber powder. It can significantly improve the physical properties of the rubber compound and prolong the service life of rubber products. So what are the specific effects of activated rubber powder, what are the factors related to the modification effect in natural rubber, and which occasions can it be used?
1. The role of activated rubber powder in natural rubber
Compared with the vulcanized rubber powder, the activity of the activated rubber powder after surface activation treatment is better, and the bonding ability of the natural rubber matrix of the rubber powder is obviously improved, and the molecular segments of the two molecules can penetrate into each other to form a good transition layer. Achieve co-vulcanization, thereby improving the wear resistance, resilience, tensile stress, hardness, tear strength, aging resistance of rubber products with natural rubber as the main raw material, reducing the tensile strength of vulcanized rubber powder to natural rubber, Improve the overall performance of natural rubber by breaking the effects of elongation, permanent deformation and aging resistance.
2. Factors affecting the modification effect of activated rubber powder in natural rubber
The fineness of activated rubber powder is one of the factors affecting the modification effect of activated rubber powder on natural rubber. Generally, the higher the fineness, the better the modification effect of activated rubber powder in natural rubber. The higher the comprehensive performance of natural rubber vulcanizate Therefore, rubber products manufacturers use high-grade activated rubber powder as much as possible; studies have shown that excessive use of activated rubber powder will also lead to a significant decrease in mechanical properties and fatigue resistance of natural rubber products, so it is necessary to control the amount of activated rubber powder. At the maximum, the modification effect of the activated rubber powder in the natural rubber compound is exerted. In addition, the pulverization method and activation mode of the activated rubber powder also affect its modification effect in the natural rubber.
3. Application examples of activated rubber powder in natural rubber
Car tires are one of the most common rubber products with natural rubber as the main raw material in life. They are blended with natural rubber/styrene-butadiene rubber, natural rubber/butadiene rubber or natural rubber/styrene-butadiene rubber/butadiene rubber. With the appropriate amount of activated rubber powder, the tear strength, wear resistance, aging resistance and fatigue resistance of the automobile tire can be significantly improved, and the heat generation and compression permanent deformation of the tire during running can be reduced. Experiments show that after driving for a period of time on the tar sands, the residual tire depth of the car tire after mixing a certain amount of activated rubber powder is large and the cumulative wear is small.
Activated rubber powder can also be used in the processing of other natural rubber products, such as rubber conveyor belts, not only can reduce production costs, improve the mechanical properties of natural rubber products, anti-aging properties, but also improve the fluidity of rubber compounds, reduce shrinkage, and improve rubber. The processing performance of the product and the modification effect of the activated rubber powder in the natural rubber can further reduce the cost, improve the performance of the natural rubber product and prolong its service life.