Food packaging brings great convenience to both sellers and consumers. This is reflected not only in use, but also in safety. Food is prone to contact with oxygen and bacteria in the air, which affects the taste and quality of food. Therefore, a sealed food packaging is very necessary when storing or selling food!

The chemical composition and physical and chemical properties of different foods are different, so different foods have different protective requirements for packaging. When designing food packaging, we need to choose packaging materials according to the different properties of the food itself, so as to achieve the purpose of protecting food and extending the shelf life. For example, cakes are rich in fat and soft, and have certain requirements for optimal moisture content, so at least they should meet the following requirements: oil and high oxygen resistance (to prevent oil leakage and oxidation of oil), high moisture resistance ( Prevent the cake from losing moisture and drying out).

Traditional packaging materials include glass bottles, metal cans, cartons, and cartons. Modern food packaging materials are mainly plastics, paper, composite materials (plastic / plastic, plastic / paper, plastic / aluminum, foil / paper / plastic and other types of multilayer composite materials). The functions brought by different packaging materials are also different, and the exquisiteness of their packaging will directly affect the sales of food.

In order to extend the shelf life of food, new packaging technologies are continuously developed, such as active packaging, mildew-proof packaging, moisture-proof packaging, anti-fog packaging, anti-static packaging, selective ventilation packaging, non-slip packaging, buffer packaging, etc. These new technologies are widely used in developed countries, and are not widely used in China. Some methods are still blank. The application of these advanced technologies can significantly improve the protection function of packaging.

Packaging is a container for food, which brings great convenience to the circulation of food. At the same time, well-designed packaging is easier to attract consumers, promote sales, expand publicity, and enhance market competitiveness.