Highly effective defoamer 
 Overview 
 Defoamer is a silicone surfactant as an organic silicon compound in the family, from the 1960s to be used in various industrial fields, but the rapid development of large-scale and comprehensive, from the beginning of the 1980s. As the organic silicon defoamer, its applications are very wide, more and more attention all walks of life. 
 Mechanism of silicone defoamers defoaming 
 There is a lot of foam bubbles dispersed in a liquid dispersion, the dispersed phase as a gas, liquid continuous phase. When the system plus a surfactant, the adsorption at the bubble surface with a layer of oriented surfactant molecules, when it reaches a certain concentration, the bubble wall to form a layer of solid film. Surfactant adsorbed on gas-liquid interface, resulting in decreased surface tension of liquid, thus increasing the gas-liquid contact surface, so that the bubble is not easy to merge. The relative density of the bubble is much smaller than water, when the bubbles rise through the liquid when the liquid surface layer of surfactant molecules adsorbed up. Thus, exposure to air adsorption of surfactant solution in the same bubble film bubble film is not the same, it has two packages of surfactant molecules form a bilayer, adsorbed surfactants on the protective film the role. Defoamer is to destroy and inhibit the formation of this film, defoamer into the foam bilayer membrane orientation, membrane damage directed to break the mechanical equilibrium and bubble. 
 Defoamer must be easy to spread on the surface of the liquid solution. Such spreading of liquid in the solution will take away the surface layer of the solution near the surface, so that the local thinning of the film, so the film rupture, bubble destruction. Under normal circumstances, defoamer spreading faster in the solution surface, then the film becomes thinner, quickly reached a critical thickness of foam destruction accelerated, defoaming strengthened. Generally spread on the surface, since the role of anti-foaming liquid, its surface tension is low, easy-to-surface adsorption in solution, the solution reduces the surface tension of the local surface (ie, the surface pressure increased), the occurrence of imbalances. Since then spreading that occurred there, and it will take away the next layer near the surface of the liquid, resulting in thin liquid film, which bubble membrane damage. Thus, one reason is easy defoaming spreading, defoamer molecules adsorbed molecule replaces the foaming agent, forming a poor film strength; while away in the process of spreading near the surface layer part of the solution, so that the bubble thin film, reduces the foam stability, make it easy to damage. 
 An excellent defoamer must also take into account the consumer, defoaming effect, that not only should the rapid destruction of the foam, but also for a long period of time to prevent bubble formation. Often found that some defoamer added solution in a certain time, you lose the effect. To prevent bubble formation, would also need to add some defoamer. The reason this happens, the solution may be foaming agent (surfactant) is the critical micelle concentration than the cmc. The solution in more than cmc, defoamer (usually organic liquids) may be solubilized, resulting in loss of surface spreading in the role of anti-foaming effect greatly reduced. Joined defoamer, its spread on the surface faster than the solubilization rate, showing a good defoaming effect; after some time, with the defoamer was gradually solubilized, defoaming correspondingly weakened. 
 Quality indicators (Specification) 
 Appearance (Appearance): White viscous emulsion 
 Content (Purity): various models 
 PH :6-8 
 Dilution water: water can be diluted in any proportion 

 Silicone has many excellent properties: 
 ① chemically inert, does not react with other substances in blister; ② physiological inert, non-toxic, non-polluting, environmentally friendly; 
 ③ with excellent defoaming performance, with less; 
 ④ wide temperature range, heat, cold, weather and aging resistance prominent; 
 ⑤ excellent softness and lubrication will help to improve the quality of coated paper. However, higher prices of organic silicon products, so some manufacturers can not accept, leading to the present silicone defoamer is not widely used. In fact, from the consumption point of view, because with less silicone, are usually just added system mass fraction of 1 ~ 75 × 10-6 can get a good defoaming effect, if used with other defoamer compound can be further reduced costs. Taken together, the use of organic silicon defoamer for defoaming agent and the use of other than the costs will not increase. With the synthesis of organic silicon technology continues to improve and continue to lower raw materials, the high price of organic silicon can certainly solve the problem, it contains silicone antifoam defoamer paper market is hot. 
 Purpose (Useage) 
 This product is widely used in textile printing and dyeing, paper making, sewage treatment, cleaning agents, paints and other aspects of defoaming. When used in dyeing, the dye bath additives with good compatibility, but does not affect the shade and color fastness. 
 Packaging and storage 
 This package is 25KG or 50KG plastic drum; storage is a cool room, dry air, when not sealed, shelf life is 2 years.