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When the high shear emulsifier works, the material is emitted radially and high-speed from the slot of the rotor stator. At this time, the material is dispersed, cut, emulsified and homogenized at high speed. Besides the intense mechanical movement and liquid shear, the material is also subjected to extrusion, impact, tearing and friction. Temperature, pressure and time in chemical reaction process have great influence on the material. During the operation of emulsifier, due to the high-speed operation of the rotating stator, there will be friction between the rotating stator and the material, friction between the material and the material, friction between the material and the container. In the presence of friction, kinetic energy will be transformed into heat energy, which will lead to the increase of material temperature. Temperature changes have a great impact on some materials, so it is necessary to control temperature in the production process, so as to inhibit unnecessary chemical reactions.