1, the exclusion of part of the packaging container air (oxygen) , can effectively prevent food spoilage.
2. The use of good barrier (air-tightness) packaging materials and strict sealing technology and requirements can effectively prevent the exchange of substances in the packaging content, that is, to avoid food weight loss, loss of flavor, and to prevent secondary pollution.
3. The inner gas of the vacuum packaging container has been eliminated, which speeds up the heat conduction, which can improve the thermal sterilization efficiency and avoid the rupture of the packaging container due to the expansion of the gas during the heating sterilization. In the food industry, vacuum packaging is widely used, such as cooked products such as chicken leg, Ham, sausage, pickled products such as pickles and bean products, dried fruit and other kinds of food that need to be preserved more and more use of vacuum packaging. After vacuum packaging of food shelf-life is long, greatly extend the shelf-life of food.