Pest control packaging technology can be divided into the following five types: (1) Inflatable packaging. Inflatable packaging is a kind of packaging technology method that uses inert gas such as carbon dioxide gas or nitrogen to replace the air in the packaging container, so it is also called gas replacement packaging. This packaging method is based on the characteristics of aerobic microbial aerobic metabolism, changing the composition of the gas in a sealed packaging container, reducing the concentration of oxygen, inhibiting the physiological activity of microorganisms, enzyme activity and breathing strength of fresh products, To achieve the purpose of anti-mildew, anti-corrosion and preservation. (2) Vacuum packaging. Vacuum packaging is a kind of packaging method in which an article is placed in an airtight container and a vacuum is drawn before the container is sealed, so that there is basically no air in the sealed container. General meat commodities, grain processing commodities and certain products that are easily oxidized and deteriorated can be vacuum packaged. Vacuum packaging can not only avoid or reduce fat oxidation, but also inhibit the growth of certain molds and bacteria. At the same time, when heat sterilizing it, since the gas inside the container has been eliminated, the heat conduction is accelerated. The high-temperature sterilization efficiency is improved, and the packaging container is not broken due to the expansion of the gas during the heat sterilization. (3) Shrink packaging. Shrink packaging is a packaging technology method that wraps the article (or inner package) with a shrink film, and then heats the film appropriately to shrink the film and adhere to the article (or inner package). Shrink film is a kind of polyethylene film that has been subjected to special stretching and cooling treatment. Since the film produces residual shrinkage stress during directional stretching, this stress will be eliminated after a certain amount of heat, so that it will shrink sharply in both the horizontal and vertical directions At the same time, the thickness of the film is increased. The shrinkage rate is usually 30% to 70%. The shrinkage force reaches the maximum value during the cooling stage and can be maintained for a long time. (4) Stretch packaging. Stretch packaging is a new packaging technology that has been adopted since the 1970s. It is developed from shrink packaging. Stretch packaging relies on mechanical devices to stretch and tightly wrap elastic films around the packaged parts at room temperature, and A packaging method that seals at the ends. Since the stretch packaging does not need to be heated, the energy consumption is only one-twentieth of the shrink packaging. Stretch packaging can bundle individual items, and can also be used for collective packaging such as pallet packaging. (5) Deoxygenated packaging. Deoxygenated packaging is a new type of deoxygenated packaging method following vacuum packaging and inflatable packaging. Deoxygenated packaging is to use a deoxidizer that can chemically react with oxygen in a sealed packaging container to remove oxygen in the packaging container to protect the contents. The deoxygenation packaging method is suitable for some items that are particularly sensitive to oxygen, and is used in food packaging that even a small amount of oxygen will promote quality deterioration.
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