Purpose and type of defoamer used in adhesive tape coating

Adhesive tape coating is a manufacturing process that can be used to attach adhesive materials to a variety of objects. This process involves coating the liquid onto the substrate and drying it. However, the foam created during this process can affect the adhesion and appearance of the glue. This is why defoamer is needed.

A defoamer is a special chemical agent used to control bubbles on the surface of a liquid. In the adhesive tape coating process, the defoamer can control the formation of bubbles, so that the coating on the substrate is more uniform and more dense. In addition, the use of defoamer can improve the adhesion and gloss of the coating liquid, making the adhesive tape appearance more attractive.

There are many kinds of defoamer, which can be divided into two categories: additive defoamer and non-additive defoamer.

Additive defoamer: It is added to the adhesive tape coating process and released over time.

These defoamants are divided into two types - oily defoamants and water-based defoamants.

Water-based defoamer: Usually used for coating water-based substrates, while oil-based defoamer is suitable for coating oil-based substrates.

Non-additive defoamer: It is mixed with the coating liquid to eliminate air bubbles on the surface. These defoamers do not need to be added during the production process because they are already mixed with the substrate. These defoamers are usually silicon oxide particles, which, due to their fine pore structure, are able to absorb and eliminate bubbles on the surface, thereby improving the quality of the coating.

In short, in the production process of adhesive tape coating, defoamer is essential. They can control bubble production and improve adhesion and appearance, thus providing consumers with high quality adhesive tapes. There are many types of defoamer, so the appropriate type of defoamer can be selected according to the characteristics of the coating liquid to achieve the best results.