Why do all the bottles have seals on them?

We often encounter something, especially milk. When we buy bottled food or medicine from the market, when we open the bottle cap, we often see a silver “sticker” on the mouth of the bottle. In fact, This is what the industry calls an aluminum foil gasket; it mainly plays the role of isolating air, increasing sealing, and protecting the contents of the bottle; but it does not use any adhesive material, so how is it sealed on the bottle mouth? Let me talk about it in detail next.

First of all, it mainly uses a special sealing equipment in the market. It uses an electromagnetic principle to generate magnetic lines and rely on the heat energy generated during the cutting process to cause a certain physical interaction between the sealing layer of the aluminum foil gasket and the bottle mouth. Changes and allow the molecules to penetrate each other to achieve sealing results; its excellent sealing effect has been widely used in the food and pharmaceutical fields, and it is currently a relatively perfect sealing solution.

Of course, it is impossible to complete this task manually, and if you use glue to stick it, it will not only be unhygienic, but also increase a certain degree of difficulty when consumers open it. The use of aluminum foil gaskets not only achieves an ideal seal effect, and it will not increase the difficulty of opening.