1. Emulsification equipment The mechanical equipment for preparing emulsion is mainly emulsifier, which is a kind of emulsification equipment that mixes oil and water evenly. At present, there are three main types of emulsifiers: emulsification mixer, colloid mill and homogenizer. The type, structure and performance of the emulsifier have a great relationship with the size (dispersibility) of the emulsion particles and the quality (stability) of the emulsion. Generally, such as the stirring emulsifier which is still widely used in cosmetic factories, the prepared emulsion has poor dispersibility. The particles are large and rough, less stable, and more prone to contamination. However, its manufacture is simple and the price is cheap. As long as you choose a reasonable structure of the machine and use it properly, it can also produce popular cosmetics with general composite quality requirements. In recent years, Vacuum Mixer Homogenizer design has made great progress, and the emulsion prepared by Vacuum Mixer Homogenizer design has excellent dispersibility and stability.
2. Temperature The emulsification temperature has a great influence on the quality of emulsification, but there is no strict limit on the temperature. If oil and water are both liquid, emulsification can be achieved by stirring at room temperature. Generally, the emulsification temperature depends on the melting point of the high-melting substance contained in the two phases, and also considers factors such as the type of emulsifier and the solubility of the oil phase and the water phase. In addition, the temperature of the two phases needs to be kept nearly the same, especially for the wax and fat phase components with higher melting points (above 70°C), when emulsification, the low temperature water phase cannot be added to prevent the wax, Fat crystallizes out, resulting in lumpy or rough, uneven emulsions. Generally speaking, during emulsification, the temperature of the oil and water phases can be controlled between 75°C and 85°C. If the oil phase contains high melting point wax and other components, the emulsification temperature will be higher at this time. In addition, if the viscosity increases greatly during the emulsification process, the so-called too thick and affects the stirring, the emulsification temperature can be appropriately increased. If the emulsifier used has a certain phase inversion temperature, the emulsification temperature is also preferably selected around the phase inversion temperature. The emulsification temperature also sometimes has an effect on the particle size of the emulsion. For example, when the fatty acid soap anionic emulsifier is used for emulsification by the primary soap method, when the emulsification temperature is controlled at 80 °C, the particle size of the emulsion is about 1.8-2.0 μm. If emulsification is performed at 60 °C, the particle size is about 6 μm. When emulsified with nonionic emulsifiers, the effect of emulsification temperature on particle size is weak.
3. Emulsification time of Vacuum Mixer Homogenizer design The emulsification time obviously has an influence on the quality of the emulsion, and the determination of the emulsification time is based on the volume ratio of the oil phase and the water phase, the viscosity of the two phases and the viscosity of the resulting emulsion, the type and amount of the emulsifier, There is also emulsification temperature, but the emulsification time is to make the system fully emulsified, which is closely related to the efficiency of the emulsification equipment. The emulsification time can be determined according to experience and experiments. If a homogenizer (3000 rpm) is used for emulsification, it only takes 3-10 minutes.
4. Stirring speed Emulsification equipment has a great influence on emulsification, one of which is the effect of stirring speed on emulsification. The stirring speed is moderate to make the oil phase and the water phase fully mixed, and the stirring speed is too high
5. Stirring speed of Vacuum Mixer Homogenizer design has a great influence on emulsification, one of which is the influence of stirring speed on emulsification. The moderate stirring speed is to make the oil phase and the water phase fully mixed. If the stirring speed is too low, the purpose of full mixing will obviously not be achieved. However, if the stirring speed is too high, air bubbles will be brought into the system, making it a three-phase system. Makes emulsions unstable. Therefore, the entry of air must be avoided during stirring, and the vacuum emulsifier has excellent performance.
Smart Zhitong has many years of experience in the development, design Vacuum Mixer Homogenizer Vacuum Homogenizer Mixer and the machine capacity from 5L to 18000L
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Post time: Nov-01-2022
