defoamer-antifoam

What is a silicone defoamer ? Why can silicone work to break foam? The defoamers must be able to reduce the surface tension to break foam in order to control foam, Compared with most other foam control materials, silicone has lower surface tension and interfacial tension, it is difficult to be dissolved by surfactants commonly used in the system. At the same time, compared with glycol-based or mineral oil-based defoamers, the toxicity is relatively low. What are the advantages of silicone defoamers? Is it suitable for corrosive conditions? Silicone defoamers can ensure efficient and lasting effect. Silicone defoamers are very safe. Many categories meet the requirements of the US Food and Drug Administration (FDA), the US Environmental Protection Agency (EPA), the US Department of Pesticides (USDA) and other regulations , Low surface tension, can effectively control the generation of foam in a variety of foaming materials. There are a variety of defoamers that can perform well under var...

How should we select defoamers / antifoams for paper pulp? Pulp and paper antifoaming agents is very necessary in papermaking, because a lot of foam will be generated in the process of papermaking and pulping, the surface tension of the generated saponification is less than the surface tension of black liquor produced by cooking materials, making it It exists in the surface layer of black liquor and forms a thin film, which forms foam under the mixing action of air. The papermaking process is mainly divided into two major steps,  Washing pulp Papermaking No matter which step inevitably produces foam, so you need to use defoamers/antifoam for paper industry, there are many types of defoamers, the following is for everyone Introduce the characteristics of papermaking defoamers. Excessive foaming will result in the loss of fibers and raw materials. Further, the presence of air in the wet paper web can affect the filtration rate of paper in the paper making pulp defoamers is a better s...

The epidemic situation of the new coronavirus in China has been effectively controlled, but coronavirus has already broken out in other regions of the world. In addition to our country, Italy has also set up blockade and isolation measures. Potential negative demand impact-FMCG growth slows Worries about the virus are likely to affect consumer consumption patterns. From the perspective of pulp and paper, this trend will most directly affect packaging demand. In the past, the post-holiday recovery difficulties caused by the virus in our country, the large-scale loss and even the closure of the tertiary industry such as catering, tourism, and supermarkets, as the virus entered other major countries (the Western country ’s tertiary industry accounted for a larger proportion May be more prominent), consumers may exhibit similar behavior. Trend chart of the proportion of employment of tertiary industry in China   Trend char...

Why does foam generate in biochemical water treatment process? Chemical foam (starting foam) It is formed by the agitating and blowing off the surface active substances in the wastewater. In the initial stage of activated sludge cultivation, there are many chemical foams, and sometimes foam hills up to several meters are formed on the surface of the aeration tank. This is mainly because the initial activated sludge has not yet formed, and all the foam-generating substances form foam under the action of aeration. With the increase of activated sludge, a large amount of surface active substances are absorbed and decomposed by microorganisms, and the foam will gradually disappear. Chemical foam is milky white, easy to handle, can be filled with water to defoam, or defoamer has been added. Denitrifying foam If the nitrification reaction is carried out in the sewage plant, denitrification will occur in the sedimentation tank or in ...

Defoamers for Distilleries and Sugar Refineries During the production process of the sugar industry, the sugar liquid is mixed with the air under the influence of factors such as stirring, flow and transportation, and it is easy to produce a large amount of foam. The generation of foam often causes the sugar liquid tank to rise and cause material loss. At the same time, more foam also affects the transportation of the sugar liquid, resulting in difficulty in operation. In the evaporation and crystallization section, the thick foam slows down the evaporation and crystallization speed of water, increases energy consumption, and affects the economic benefits of the sugar factory. Therefore, it is very important to eliminate and suppress the formation of sugar liquid foam. The methods for eliminating foam generally include mechanical physical defoaming method and chemical defoaming method. Due to the advantages of time-saving, labor-saving, less investment and quick results, the defoaming...

INVELYCHEM is focus on defoamers in China with full range of industries over 10 years, as ANTIFOAMS producer,Invelychem offers a great alternative choice to customer globally.  In 2019, we expand our capacity up to 18,000tons/year because of the rapid growth of our  business. Silicone based defoamers : 8000Tons/Year Fatty Alcohol based defoamers: 6000Tons/Year Mineral Oil based defoamers: 1000Tons/Year Polyether based defoamers: 3000Tons/Year. Our philosophy is refreshingly simple. To produce the best products in the market and support this with an outstanding technical sales and customer support team.  Chinese Leaders in Foam Control Solutions—Serving global market with our profession for more info:  https://www.ywlchemical.com/

Antifoam Applications - When To Use or Should You Use Them? Foam is a gas (usually, air) dispersed in a liquid containing some impurity. In secondary treatment systems, bacterial activity is usually the main cause of foam, although mechanical action (cascading flow, pumps, violent agitation, etc.) and chemical contamination also can cause foam. Surfactants in the influent or in some polymer treatments can also cause foaming. Excessive foam, especially in an aeration basin, can cause a variety of problems. A foam blanket on the aeration basin can interfere with oxygen uptake of the microorganisms and hinder BOD reduction. Foam can also cause the biological floc to float producing a sludge which will not settle in the final clarifier. Safety hazards and aesthetic problems occur when wind blows foam across parking lots or highways or neighboring locations. Foam can become an aesthetic problem when a thick blanket of foam floats down a stream from the plant outfall. Antifoams control or e...

What is a defoamer / deaerator’s purpose in the system? Defoamers prevent formation of foam during manufacture and application of coatings and printing inks. Foam that is already formed is destroyed and air occlusions are prevented. Deaerators prevent development of air occlusions and pinholes. Why use a defoamer? The occurrence of foam is considered an undesirable but unavoidable phenomenon in coatings and printing inks. The formation of foam interrupts production processes, reduces the effective volumes in the production plant, and leads to unnecessary down time. Foam also interferes with the application process. In printing, foam can cause the ink reservoirs to overflow and can impair ink transfer from the printing cylinder to the substrate. Dried foam leaves surface defects in the paint film. To prevent foam and destroy any foam present, defoamers must be added to the formulation. defoamer vs. deaerator? To eliminate macro-foam on the surface, to prevent air occlusions, and...

Application of fumed silica in defoamer The fumed silica is a kind of high-purity, fine, amorphous nanometer silica powder. The specific surface area is 150 ~ 380m2 / g, the primary particle size is between 7 ~ 40 nm, the aggregate particle size is about 200-500nm, the agglomerate particle size is about 5 ~ 20μm, and SiO2 ≥99.5%. Functional additives. In addition to being widely used in silicone rubber, coatings, inks, paints, plastics and other fields, it is also an important component in high-efficiency silicone oil defoamers, which plays a role of dispersion, adsorption, thickening and anti-settling. Vapor-phase process carbon black generally has two types of hydrophilic and hydrophobic products. The hydrophobic products are obtained by surface treatment of hydrophilic products. As an important auxiliary in the industry, the defoamer has a small amount but is indispensable. It is widely used in various fields such as textile, papermaking, petroleum, food, pharmaceutical and so o...

What is Defoamers in paints, inks? Defoamers are chemical additives that reduce and/or prevent the formation of foam in industrial-process liquids. For this article, we’ll discuss defoamers in relation to paints, inks, adhesives and even construction products. The terms anti-foam agent and defoamer are often used interchangeably. However, anti-foam agents more accurately refer to materials that inhibit the generation and formation of bubbles. Dependent upon the application and performance requirements, they consist of polydimethylsiloxanes and other silicones, insoluble oils, stearates and glycols, as well as inorganics, such as silicates and talc. Foam is a coarse dispersion of a gas in a liquid, where the volume fraction of gas is greater than that of the liquid. The bubbles will migrate to the surface because their density is less than that of the liquid. As the bubbles coalesce and collect at the air/surface interface, the bubble walls thin and break. Defoamers accelerate the pr...

Why should use defoamer for liquid detergent? Detergent is a new laundry detergent after detergent and soap. I believe many people have misunderstood laundry detergent. They think that the foam in laundry detergent is getting better and better. Actually it is not, whether it is laundry detergent or detergent. It is not to determine the cleaning ability by looking at the amount of foam, and too much foam, not only clothes are difficult to clean, but the foam that is discharged is also difficult to be decomposed by nature, so the laundry liquid produced by general manufacturers will use laundry liquid defoamer. The difference between laundry detergent and washing powder: ²   The surface active ionic components are different, the laundry detergent is non-ionic, and the laundry powder is anionic surfactant ²   The PH value is different. The laundry detergent is neutral, while the detergent is alkaline. Foam introduction of laundry liquid: The cleaning ability of the ...

How to choose defoamer for industrial cleaning? Beer bottle cleaning defoamer In the cleaning of beer bottles, defoamers are generally required to be resistant to high temperatures and strong alkalis, and solid defoamers are used more often. It is recommended that you can choose solid silicone defoamers. The carrier is easy to dissolve the antifoaming agent. If the carrier is relatively poor and difficult to dissolve, then precipitation will occur and the effect will be affected. Circuit board cleaning defoamer Circuit board cleaning and defoaming agents are mainly used in two processes, one is development, and the other is film / etching. The process is different and the products selected are different. Generally, a little more silicone defoamer is selected during the development stage, and the cost performance is outstanding. However, at the time of the film / etching stage, non-silicon products must be considered at this time. Circuit board cleaning and defoaming agent is ma...