Defoamer is also called defoamer, anti-foam agent, defoamer is actually the meaning of eliminating foam, it is a low surface tension and high surface activity, can inhibit or eliminate the foam in the system of substances. 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.



The application of defoamer is very wide, which can be used to eliminate the harmful foam produced in the production process of latex, textile sizing, coating, petrochemical, paper making, industrial cleaning, food fermentation and other industries.



Characteristics of defoamer



There are many types of defoamer, there are oil-based, solvent, silicone, emulsion and solid powder. The defoamer has the following properties:


1, strong defoaming ability, small dosage;


2, the addition of defoamer will not affect the basic properties of the system;


3, small surface tension;


4, good balance with the surface;


5. Good dispersion and permeability;


6, good heat and acid resistance;


7, chemical stability, strong oxidation resistance;


8. Good gas solubility and permeability;


9, small solubility in foaming solution;


10, high physiological safety.




The role of defoamer



The defoamer has a defoaming or defoaming ability because it has a very low surface tension to enter and destroy the bubble film, resulting in a defoaming effect. 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.


According to the function of defoamer, it can be divided into three types: defoamer, defoamer and defoamer. Foaming agent is added after the liquid bubbles, through the role of adsorption bubbles and surface tension into the bubble film to make the base thin, can quickly destroy the bubbles, reduce the liquid level. Foam suppressor is a substance that can inhibit the formation of foam, and it is adsorbed on the bubble together with the liquid foaming substance, so that the surface tension is reduced, the bubble film is thinner, resulting in damage, and can prevent foaming. The defoaming agent is adsorbed in the bubble in the liquid, and the air in the bubble is gathered. After the bubbles adsorb each other, a large bubble is formed when the adsorption interface is damaged, and the rising speed is accelerated due to the increase of buoyancy, which promotes defoaming. The defoamer generally has many functions such as breaking, suppressing and defoaming