Vacuum bags in the packaging industry has been frequently used in food packaging, pharmaceutical supplies packaging, electronic product packaging, and other industries. With the gradual improvement of people’s living standards, as well as the quality of life requirements continue to improve, vacuum bags in the entire packaging industry has a pivotal position.
Vacuum bags are mainly used by deoxygenation to avoid oxidation of products, to ensure the quality of products. At the same time, it also has anti-pressure, gas resistance, preservation, and other effects. It can more effectively maintain the original color, aroma, taste, shape, and nutritional value of food for a long time.
Like the general oil food when it is exposed to the air will spontaneously oxidize, in the process, fatty acids in the fat can form hydrogen peroxide, its chemical properties are very unstable, can make the product change its original properties and odor. The role of the vacuum bag is to avoid this oxidation process, in order to protect the product, extend the shelf life.
In addition, such as anti-static vacuum bags, in its storage, will form different carbon compounds, hydroxy compounds, and short-chain fatty acids, some of which may be further oxidation reactions, such as aldehyde can be further oxidized into the corresponding acid. The decomposition product of fat oxidation has a distinct bad odor, which can produce odor even if the content is very low, thereby reducing the value of the product. Vacuum bags need to pay more attention to these issues during use.
In fact, the oxidation of vacuum bags not only reduces their quality but may also cause spontaneous combustion, in severe cases, even explosions. These problems have a certain relationship with the products of the vacuum bag. There are a lot of products easy to oxidize, such as some chemical raw materials, fiber products, rubber products, grease products, and cotton, hemp, silk, and other fiber fabrics. Discoloration or hardening occurs as soon as these products come into contact with daylight.
Therefore, the choice of products packaged in vacuum bags also needs to be careful. In order to avoid the oxidation of the product eventually contaminated the products and the vacuum bags.