In the industrial production process will produce a lot of harmful foam, seriously hinder the progress of production, then you need to add defoamer to eliminate these harmful foam. A defoamer is a substance with low surface tension and high surface activity that can inhibit or eliminate foam in a system.






The defoamer has the ability of defoamer or defoamer, because it has a very low surface tension to enter and destroy the bubble film, resulting in the effect of defoamer, so the application of defoamer is very wide, can be used to eliminate latex, textile sizing, coating, petrochemical, paper making, industrial cleaning, food fermentation and other industries in the production process of harmful foam. When the defoamer is added to the foam medium, it falls to the surface of the bubble and effectively reduces the surface tension of the contact point, creating a weak point in the bubble skin, which causes the bubble to break.


Defoamer usually contains hydrophobic precipitated silica dispersed in mineral oil or silicone oil. In fact, the larger the particle size of the silica used as a defoamer, the easier it is to precipitate, especially in low-viscosity dispersion systems. The addition of hydrophobic fumed silica can completely prevent or significantly reduce this sedimentation process. The silanol group in the fumed silica is like a lot of needles, punctured the bubbles, made the small bubbles converge into large bubbles, overflow the system, and achieve the effect of defoaming. In some defoaming systems, hydrophobic fumed silica can also be a defoaming silica component, fumed silica plays a role in the defoaming agent, such as thickening and preventing settlement, and more importantly, enhancing the defoaming ability and improving the defoaming ability.






1, synthetic rubber and resin industry


When using some latex synthetic gloves, because the main material is fatty acid soap as emulsifier, the foaming phenomenon will be more serious in the process of use, especially after the end of the action, when the stripping reaction does not react monomer, this phenomenon will be more serious, in the reaction process of these complex chemical products produced bubbles. These bubbles not only greatly affect the production efficiency in the production process, but also cause waste of raw materials and products, prolong the reaction cycle of the product, and pollute the environment, so in some of the process of foam generation, this possibility will be reduced to a minimum or suppressed, that is, antifoam agent. The use of defoamer in these rubber products can improve the stability of the product, improve the wear resistance of the product, especially for some products that need to be dyed, can improve its color.


2. The oil industry


In the country's petrochemical field, defoamer is also widely used, in the process of petroleum refining, especially in the process of crude oil distillation, the distilled gas foam will affect the production efficiency of the product, the use of defoamer will achieve high efficiency continuous operation. At the same time, defoamer is also widely used in the textile industry!