Good elasticity is the most obvious feature of rubber, especially natural rubber, which is an ideal raw material for the production of highly elastic products. Landing natural rubber has the basic performance characteristics of standard natural rubber, high strength, good elasticity and low price, which can directly replace standard rubber to produce various types of high-elasticity rubber products, effectively reducing the cost of raw materials. When using floor-to-ceiling natural rubber to produce highly elastic rubber products, a reasonable design formulation can further optimize the quality of the finished product.
1. Key points in the design of vulcanization system for high-elasticity rubber products produced by landing natural rubber
The design of the vulcanization system directly affects the elasticity of the natural rubber on the ground. As the cross-linking density increases, the elasticity of the vulcanized rubber increases, and decreases as the cross-linking density continues to increase after reaching the maximum. Therefore, designing an appropriate vulcanization system and controlling the cross-linking density is the key to improving the elasticity of rubber. In addition, the type of cross-linked bond also affects the elasticity, and the polysulfide bond has a higher resilience due to its smaller bond energy and less binding force to the movement of the molecular segments.
When using landed natural rubber as the main raw material to produce high-elasticity rubber products, thiazoles or hyposulfonamides are generally used as the main accelerators, and guanidines are used as the second accelerators to improve the resilience of vulcanized rubber while maintaining good physical E4LYY510 mechanical properties and small hysteresis losses. In actual production, the vulcanized rubber with the semi-effective vulcanization system of landed natural rubber has the best elasticity, followed by the vulcanized rubber of the ordinary sulfur vulcanization system, the elasticity of the vulcanized rubber of the effective vulcanization system is again, and the elasticity of the vulcanized rubber of the balanced vulcanization system is the worst.
2. Key points of the design of the reinforcement filling system for the production of high-elasticity rubber products by landing natural rubber
In the production of high-elasticity rubber products, the selection of carbon black and inorganic fillers will also affect the elasticity of rubber. The smaller the particle size, the greater the surface activity and the higher the structure of the carbon black used, the better the reinforcing performance in the landing natural rubber and the lower the elasticity of the vulcanized rubber. The effect of silica on rubber elasticity is similar to that of carbon black, and the elasticity of vulcanized rubber generally decreases with the increase of inorganic filler, but the decrease is smaller than that of carbon black.
When using floor-to-ceiling natural rubber to produce high-elasticity rubber products, the elasticity of vulcanized rubber is mainly provided by rubber molecules, and the elasticity of rubber can be effectively improved by appropriately increasing the content of raw rubber, reducing the amount of filler, and increasing the glue content. The appropriate amount of carbon black with low structure, large particle size and lack of surface chemical binding with rubber makes the vulcanized rubber relatively more resilient. When inert fillers such as heavy calcium carbonate and clay are filled with no more than 30 parts in the floor-to-ceiling natural rubber, the elasticity of the vulcanized rubber is basically unaffected.
When landing natural rubber instead of natural rubber to produce high-elasticity rubber products, part of butadiene rubber can also be used to reduce the crystallization ability of natural rubber and improve the elasticity of vulcanized rubber. When designing the formula of high-elasticity rubber products, it is necessary to comprehensively consider the selection of raw rubber, the design of vulcanization system, the selection of cross-linking bond types, the improvement of glue content, and the selection of carbon black and inorganic fillers. Through scientific and reasonable formula design, the elasticity of rubber products can be effectively improved to meet the needs of different application fields.
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