[Chemical Knowledge]：The role of foaming agent

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Foaming agent is a kind of chemical substance widely used in various industrial fields. Its function is to assist the foaming reaction of substances in the chemical reaction. Blowing agents can be divided into two categories: organic blowing agents and inorganic blowing agents. Organic blowing agents include compounds such as polyurethanes, polyamides, and polyethers, while inorganic blowing agents include aluminum oxide, ammonium carbonate, and aluminum hydroxide.

In industry, the application of foaming agent is very extensive, mainly including the following aspects:

1. Plastic manufacturing

In the plastic processing process, foaming agent can be used to control the density and shape of plastics. For example, in the film manufacturing process, by adding a foaming agent, a thin and light plastic film can be manufactured. In the manufacturing process of the foam, the foaming agent is essential, it can make the gas in the plastic in the heating process to expand, thus forming air pores, so that the density of the foam is greatly reduced.

2. baking food

in baking biscuits, cakes and bread and other foods, foaming agent can play a role in making the food volume larger. The gas in the foaming agent expands after heating, so that the food becomes larger and tastes better.

3. Pharmaceutical

Foaming agents also play a very important role in the manufacture of oral tablets and injections. By adding a foaming agent, the drug powder can be concentrated into smaller blocks, which is easy to process and use.

4. Cosmetic

In the cosmetic manufacturing process, foaming agent can be used to control the texture of the product and increase the spreadability. At the same time, the foaming agent can also make the foam product more delicate, easier to massage the skin, and improve the skin absorption effect.

Although the application of foaming agent in various fields is different, its basic principle is the same: in the process of chemical reaction, the foaming agent releases a large amount of gas, produces a large number of bubbles and foam, so as to achieve the effect of controlling the volume, texture, density and so on.

When using foaming agents, attention should be paid to their stability and safety. Some foaming agents may produce harmful gases, which may affect the human body and the environment. Therefore, when using foaming agents, it is necessary to choose substances with higher safety properties and follow the correct use methods and handling procedures.