The control range of roller temperature during the mixing operation of the open mill varies depending on factors such as the type of rubber compound.
For natural rubber, the roller temperature is generally controlled at 40-60℃. This temperature range is conducive to the plasticizing and mixing of natural rubber between rollers, enabling it to blend better with compounding agents and avoiding problems such as scorching caused by excessively high temperatures.
For styrene-butadiene rubber in synthetic rubber, the roller temperature during mixing should be controlled at 45-55 ℃. Nitrile rubber, due to its oil resistance and other characteristics, is relatively sensitive to temperature. The roller temperature is usually controlled at 30-40 ℃. If the temperature is too high, it may cause the nitrile rubber to have a tendency to scorch or deteriorate in performance.
In actual operation, the types and addition amounts of compounding agents and other circumstances also need to be taken into consideration. If a large amount of heat-generating compounding agents are added, or in the case of high-speed mixing, the lower limit of the roller temperature control range may need to be appropriately reduced to prevent the rubber compound from overheating.
