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There are two common packaging methods for goods in supermarkets, vacuum packaging and nitrogen filled packaging. What is the scientific principle

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vacuum packaging, also known as decompression packaging, is to extract and seal all the air in the packaging container to maintain a high decompression state in the bag. The lack of air is equivalent to the effect of low oxygen, so that microorganisms have no living conditions, so as to achieve the purpose of fresh fruits and no disease and rot. At present, there are vacuum packaging in plastic bags, aluminum foil packaging, glassware, plastic and composite packaging, etc. Packaging materials can be selected according to the type of articles. As fruits are fresh food, they are still breathing, and high hypoxia will cause physiological diseases. Therefore, less fruits use vacuum packaging
the mechanism of vacuum packaging: its purpose is to reduce the oxygen content in the packaging, prevent the mold rot and deterioration of the packaged food, hold the color, flavor and extend the shelf life of the food
vacuum packaging certainly plays an important role in food However, it has an extraordinary effect on the processing of clothing products
compared with ordinary packaging methods, vacuum packaging It reduces the space occupied by items And it has the advantages of moisture, dust and bacteria prevention It makes the transportation of clothing goods more convenient
the possibility of loss caused by some accidents is greatly reduced

advantages of nitrogen flushing packaging:
1. Nitrogen is non-toxic and tasteless, and will not damage food
2. Nitrogen has stable chemical properties, does not support bacterial respiration, and cannot deteriorate food.

food decay is due to contact with oxygen Vacuum and nitrogen filled packaging are designed to isolate food from oxygen Vacuum is that food is isolated from air and cannot be in contact with oxygen; Nitrogen filling is to replace air with nitrogen to make food contact with inert gas that will not oxidize and deteriorate

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