According to the way of combination with the container, plastic bottle caps can be simply divided into the following three categories.

PP containers should have good transparency and gloss, which are more in line with people's aesthetics and have strong appreciation, so they are very popular.

Heat-resistant to 70°C, only suitable for warm or frozen drinks, easy to deform when filled with high-temperature liquid or heated, and there are substances harmful to the human body melted out.

Part of the air (oxygen) in the packaging container is excluded, which can effectively prevent food spoilage.

The safety and stability of food bottle packaging in a high temperature environment has now attracted everyone's attention.

The use of coating technology to manufacture barrier plastic bottles has shown a downward trend, and Krones AG of Germany and Tetra Pak of the United States (Tetra Pak, Illinois) have begun to reduce production scale.