Epoxy Defoamer: the Hidden Enemy of Industrial foam
Epoxy Defoamer: the Hidden Enemy of Industrial foam
In industrial production, especially in the fields of coatings, inks, adhesives, etc., foam is often a headache. It not only affects the appearance quality of the product, but may also have a negative impact on production efficiency. To solve this problem, scientists have developed an efficient chemical additive - epoxy defoamer
1、 Definition and main components of epoxy defoamer
Epoxy defoamer is a chemical additive widely used in industry and daily life, mainly used to eliminate foam in liquid. Its main component is epoxy resin, which endows defoamers with good chemical stability and high temperature resistance.
2、 Causes and hazards of foam
In the production process of paint, ink, etc., foam is usually produced due to the entrainment of air in the liquid, or the introduction of gas in the process of liquid mixing, pumping, etc. If these foam are not eliminated in time, they will lead to uneven coating surface, bubbles, pinholes and other defects, which will seriously affect the beauty and protective performance of the product. In addition, foam may also reduce the adhesion between the coating and the substrate, resulting in the coating falling off easily, thus affecting the service life of the product.
3、 Working principle of epoxy defoamer
The working principle of the epoxy defoamer is to reduce the surface tension of the liquid and destroy the stability of foam, thus promoting the rupture and dissipation of foam. Specifically, the active ingredients of defoamer can quickly migrate to the interface of foam, interact with the ingredients in foam film, change the physical and chemical properties of foam film, and make it fragile and burst.
4、 Application fields of epoxy defoamers
Coating industry: During the production and construction of high-performance coatings such as epoxy topcoat, the epoxy defoamer can effectively eliminate foam, improve the uniformity and adhesion of the coating, and thus enhance the protective performance of the coating.
Ink industry: In the production and printing process of ink, foam will affect the printing quality and speed. The use of epoxy defoamer can significantly reduce the production of foam and ensure the uniformity and clarity of printing effect.
Adhesive industry: During the preparation and use of adhesive, foam may reduce the adhesive strength. The addition of epoxy defoamer can eliminate foam and improve the bonding effect of adhesive.
Food industry: In the production process of dairy products and beverages, the epoxy defoamer (which must meet the food grade standards) can effectively control the generation of foam and ensure the taste and appearance of the products.
5、 Selection and usage precautions of epoxy defoamer
When selecting epoxy defoamers, comprehensive consideration should be given to specific production processes and product requirements. Evaluate the performance of different defoamers through laboratory testing and select the most suitable product. At the same time, it is also very important to pay attention to the environmental friendliness and safety of defoamers.
When using epoxy defoamers, the following points should be noted:
Addition amount: The amount of defoamer added needs to be adjusted according to the actual situation, usually requiring experimentation to determine the optimal dosage. Excessive use may lead to a decrease in the fluidity of the liquid, affecting the performance of the product.
Compatibility: Ensure that the defoamer has good compatibility with the liquid system used to avoid problems such as delamination and incomplete curing.
Stability: Epoxy defoamers must remain stable under different environmental conditions, such as temperature, humidity, and storage time, to ensure their sustained defoaming and anti foaming effects.