Food packaging, is part of the food products. One of the main engineering in the process of food industry. It protect the food, made the food in the process of leaving factories to hands of customers, to prevent biological, chemical, and physical external factors of the damage, It can also have the function of keep food itself stable quality, it is convenient for people to eat the food, also it is firstly present the food appearence, the image to attract consumption, with the value beyond material cost. Therefore, food packing process is an inseparable part of the food manufacturing systems engineering. But food packging process versatility and it has a relatively independent system of self.
The process of using plastic food packaging products mainly include four industrial sectors: the first industry refers to the plastic resin and film production. The second industry is the flexible and rigid packaging materials processing industry, the third is the packaging mechanization production industry, the fourth is the food processing industry. In the first industry is the use of such as oil, coal, natural gas, raw material, synthetic polymerization of low molecular compounds, and then aggregated into various resin. The processed into single or multi-layer composite membrane, for the food processing factory packaging.
Food packaging according to the packing materials can be divided into metal, glass, paper, plastic, composite materials, etc.; According to the packing type is divided into cans, bottles, bags, bag, box, box, etc.; According to the packing way is divided into jar hidden, bottled, envelope, bags, wrapping package and perfusion, the whole set, sealing, labeling, printing, etc.; According to the product level is divided into the inner packing, secondary packaging, three-level packaging... the outer packing, etc.
Because more and more attention to food safety, higher requirements for some countries to strengthen the regulatory management more of the food packaging products. From a nutritional standards regulations, such as the indirect additive regulations to push biodegradable packaging, electronic scanning bar code, etc., promote the new development of food packaging.
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