What are the types of food packaging materials?

In order to achieve the purpose of maintaining food quality, the food will not be deteriorated during storage, circulation and sales, to prevent microbial contamination, to prevent super-chemical and physical changes, and various foods must be packaged.

In order to meet the needs of food packaging, according to the needs of food packaging, according to the different types of food, the packaging materials are classified into: metal can packaging, glass packaging, paper container packaging, plastic packaging and so on. Originally we mainly talked about two packaging materials for metal cans and glass bottles.

Metal cans are divided into tinplate materials and aluminum plates from the material, and can be divided into three-piece cans and two-piece cans from the canning procedure. The cans of metal cans are packaged in a variety of foods, which have a long storage time, are convenient for transportation and sale, and are convenient to eat. Canned foods are further divided into acidic foods and sulfur-containing foods. In order to meet the packaging requirements of acidic foods and sulfur-containing foods, the tanks must have an anti-corrosion layer, usually called can coating, which is before the canning, in the coating line. The entire tinplate coating coating is applied to the film to form a coating iron and then to make a can.

Glass bottles have been used as packaging containers for a long time. Glass bottles as a food packaging container have the characteristics of transparency, sealing, chemical stability and reusability, but the disadvantages are fragile and heavy. As a cap that matches the glass bottle, it has a decisive effect on the quality of the bottled food. The bottle cap of the jar has a general cap and a four-rotor cap. Generally, the cap is inconvenient to eat after being packaged, and there is a problem that the can is not easy to open, and the four-rotating cap has already solved the problem well. However, further improvements are needed in the anti-corrosion issue.

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