There are two main treatment methods for waste rubber and waste rubber products. One of them is to process the waste rubber and waste rubber products into a powdery rubber material, which is processed by a certain process. The tire rubber powder is the most, which can be used in various rubber products to reduce the production cost; however, in the actual operation process, the interface between the rubber powder and the matrix glue is combined, resulting in a significant decrease in the mechanical strength of the rubber product mixed with the rubber powder; How to solve it?
1. Process ordinary rubber powder into ultra-fine rubber powder and fine rubber powder
At present, the production equipment and processing methods of rubber powder are continuously improved. More and more fine rubber powder and ultra-fine rubber powder appear on the market. These rubber powders have higher fineness than ordinary rubber powder, and have large specific surface area, which can increase glue. The contact area between the powder and the matrigel increases the active center of the surface of the rubber powder by the action of physical mechanical force. The rubber powder can be uniformly dispersed in the matrigel and fully reacted with the matrigel, thereby solving the rubber powder and the matrigel. The interface is combined with the problem.
2. Activate and modify the rubber powder
The so-called activated rubber powder is a reactive rubber powder product obtained by surface activation treatment of a common rubber powder with a chemical compounding agent, and the surface active center of the rubber powder is increased; the activated modified rubber powder is generally subjected to a chemical method such as grafting to the rubber powder. Modification treatment, in this process, there will be selective sulphur bond on the surface of the cleavage rubber powder, increase the surface active group of the rubber powder, and the processing performance is good; the above two methods use the chemical method to solve the interface between the rubber powder and the matrigel Combined with the problem; it is understood that the physical and mechanical properties of the rubber product are significantly improved after using an appropriate amount of activated rubber powder and modified activated rubber powder in the rubber product.
In the production of rubber products, the use of ultra-fine rubber powder, fine rubber powder, activated rubber powder and modified activated rubber powder can solve the problem of interface bonding between rubber powder and matrigel, and reduce the production cost of rubber products. Can improve the physical properties of rubber products.
In the actual application process, not all rubber products need to solve the interface bonding problem between the rubber powder and the matrigel. When using rubber powder to reduce production cost, rubber products with higher requirements on mechanical strength and wear resistance of rubber compound can be activated with activated rubber powder and modified activated rubber powder. For example, 30 parts of motorcycle tire tread rubber is used for modification. Activated rubber powder can significantly improve the wear resistance of the rubber compound and increase the mileage of the tire; the higher the surface brightness requirement and the thinner the thickness, the fine rubber powder and ultra-fine rubber powder are used; for some ordinary rubber miscellaneous pieces, etc. For rubber products with low mechanical properties, use ordinary rubber powder.