跳至主要内容

Why are emulsion defoamers layered?

In many production processes, problem caused by harmful foams. The presence of these foams reduces the utilization rate of equipment, causes production losses, pollutes the environment, and even affects the normal operation of operations.

To eliminate harmful foam, you can use standing, decompression (vacuum), heating or pressurization, chemical defoaming, etc. But when you need to quickly and effectively eliminate foam in a short time, you need to use chemical defoaming. Chemical defoaming does not require a lot of equipment investment and does not need to change the original process. It is the most convenient way of operation.emulsion defoamers

 

Why are emulsion defoamers layered?

Emulsion-type defoamers will delaminate if they are not used for a long time. After delamination, defoamers will affect their use.

Why do they delaminate? What are the causes?

Emulsion defoamers are physically emulsions and are thermodynamically unstable systems. Layering may occur after long-term storage, but use after stirring does not affect product effectiveness. Another layering phenomenon may be deterioration and layering. This is because the bacteria act on the emulsion. If it is not very serious, this product can also be used as long as it is added with a strong fungicide to kill the internal bacteria and return to the normal state. Run out as soon as possible. There is also a delamination phenomenon because the defoamer is diluted with water, destroying the original structure of the defoamer, resulting in poor stability of the defoamer, breaking the viscosity system of the defoamer itself, and causing delamination of the defoamer. Whether the defoamer is easy to layer is also an important indicator to measure the quality of the defoamer.

https://www.linkedin.com/company/china-defoamer

https://invelydefoamer.blogspot.com/

https://www.facebook.com/invelychem/

 

标签：

评论

发表评论

此博客中的热门博文

The magical effect of fumed silica in silicone rubber

The magical effect of fumed silica in silicone rubber Fumed silica is one of the most important high-tech ultra-fine inorganic new materials. Due to its small particle size, it has a large specific surface area, strong surface adsorption, large surface energy, high chemical purity, good dispersion performance, thermal resistance, It has specific properties in terms of electrical resistance, etc. Its superior stability, reinforcement, thickening and thixotropic properties are unique in many disciplines and fields and have an irreplaceable role. Today, Xiaobian will work with you to learn how to apply fumed silica in silicone rubber. Application of fumed silica in high temperature vulcanization (HTV) silicone rubber The use of fumed silica can be divided into silicone materials and other fields, in which the amount of silica in the silicone material is nearly 60%, and the silicone rubber is the most used material in the silicone material. It can be added in an amount of up to 50% ...
1 条评论
阅读全文

How do we assess antifoam efficiency ?

How do we assess antifoam efficiency ? Quality of an antifoam is given by two main characteristics : • Knockdown ability or shock effect :Meaning the speed to destroy an existing foam. • Persistence or durability : Meaning the efficiency over time.   These two parameters can be assessed by several tests. The main test is the bubbling method. A graduated column with a glass frit in the bottom is required. Foaming water is poured in the column and air at constant flowrate is introduced through the glass frit in the column. Foam is generated by the air and starts to travel up the column. At a determined level of foam, antifoam is injected. By this method several antifoaming agents can be tested. A graph reporting foam height vs time is very helpful to establish the knockdown ability and the persistence for each product. The selected antifoam is the product with the best compromise between shock effect and durability       Environmental performance   Silicone antifo...
1 条评论
阅读全文

Why is there foam in the paint and coating? What we should do to eliminate foam?

Why is there foam in the paint and coating? What we should do to eliminate foam?             check below details:           Surface tension The surface tension of the coating has a great influence on the defoaming agent.  The surface tension of the defoaming agent must be lower than the surface tension of the coating. Otherwise, there is no defoaming and foam suppression. The surface tension of the coating is a variable factor, so a constant surface tension is required when using the defoamer, and then the surface tension variation factor is taken into account. The influence of other additives Surfactants used in coatings are mostly functionally incompatible with defoamers. In particular, emulsifiers, wetting and dispersing agents, leveling agents, thickeners, etc., have an effect on the effect of the antifoaming agent. Therefore, we must pay attention to ...
发表评论
阅读全文