1. Part of the air in the packaging container is eliminated, which can effectively prevent food from spoiling and spoiling;
2. The use of packaging materials with excellent barrier properties and strict sealing technology and requirements can effectively prevent the exchange of packaging contents, which can avoid food weight loss and taste loss, and prevent secondary pollution;
3. The gas inside the vacuum packaging container has been eliminated, which accelerates the heat transfer, which can improve the efficiency of heat sterilization and avoid the packaging container from rupturing due to the expansion of gas during heat sterilization;
4. In the food industry, the application of vacuum packaging machines is very common, various cooked products such as chicken legs, ham, sausages, grilled fish fillets, beef jerky, etc.; preserved products such as various pickles, soy products, preserved fruits, etc. need to be kept fresh More and more foods are packaged in vacuum. Vacuum-packed food has a long shelf life, which greatly extends the shelf life of the food.