Selecting a butyl rubber with suitable Mooney viscosity and rationally controlling the type and amount of rubber filler can obviously improve the calendering performance of butyl rubber. In addition, the softening system compounding agent and the type of vulcanization system in the butyl rubber product formula will also affect the calendering performance of the butyl rubber. So how can rubber product manufacturers improve the calenderability of rubber by adjusting other butyl rubber compounding systems? Is there any other way to improve the calenderability of butyl rubber?
3. Select the softener suitable for the variety and control the dosage reasonably
In the formulation of rubber products, rubber softeners, reinforcing agents, and fillers are complementary and mutually restrictive. Rubber product manufacturers can coordinate the relationship between rubber calendering performance and other indicators by adjusting the type and amount of softeners. Types of softeners Determined according to actual needs.
In general, rubbers softened with high viscosity softeners such as ointments and coomalons have good stiffness, which meets the requirements for the stiffness of calendered rubbers. Butyl, which has higher requirements for the fluidity and permeability of rubbers Low viscosity softeners such as petroleum engine oil and pine tar can be used for rubber products such as butyl rubber and wiper, which significantly increases the plasticity of the rubber and provides better conditions for calendering operations.
4.Design vulcanization system to consider scorch safety
In the butyl rubber calendering operation, the calendered rubber needs to withstand hot refining, thin pass, high temperature calendering, etc. In this process, scorch cannot be generated, otherwise the previous efforts will be wasted. In order to ensure that the calendered rubber has sufficient scorch time, rubber product manufacturers must reasonably adjust the type and amount of the vulcanization system 2LLYY0327 compounding agent in the butyl rubber product formula, and appropriately extend the scorch time to avoid rubber scorch during the calendering process problem. In general, the scorch time of the calendered rubber at 120 ° C should be controlled between 20-35 minutes.
5. A small amount of recycled rubber is used in the formula of butyl rubber products.
At present, many butyl rubber products manufacturers have started to use butyl recycled rubber to reduce the cost of rubber products. Compared with butyl raw rubber, butyl recycled rubber has good plasticity and good fluidity. Blending with butyl raw rubber can act as a lubricant to improve rubber fluidity. Therefore, blending a small amount of butyl rubber in the formula of butyl rubber products can also improve the rolling performance of butyl rubber, and improve the quality and production efficiency of butyl rubber products.
Improving the calendering performance of butyl rubber can greatly improve the comprehensive performance and production efficiency of rubber products. Rubber product manufacturers must select appropriate rubber raw materials before rationalizing the calendering operation, rationally design the product formula, and use an appropriate amount of recycled rubber when necessary. , To further improve the butyl rubber calendering performance.