A fully automatic vacuum packaging machine is a kind of equipment that uses negative pressure to remove the oxygen inside and outside the packaged items. It is widely used in industries such as food, medical, and chemical industries. Its main function is to extend the shelf life of products and maintain their freshness and quality. However, the question of whether it can truly achieve non-oxidative preservation is not that simple.

Firstly, during the operation process, a fully automatic vacuum packaging machine can usually effectively remove most of the oxygen, making the oxygen concentration inside the package relatively low. This means that the oxidation process of the packaged items will be relatively slowed down, thus extending the shelf life of the products. In some cases, vacuum packaging can even completely remove the oxygen, thereby achieving non-oxidative and aseptic preservation effects. Especially for products that are prone to oxidation or need to be preserved in a low-oxygen environment, vacuum packaging can significantly improve their anti-oxidation performance.

Secondly, in a vacuum state, a fully automatic vacuum packaging machine can effectively remove the gas inside the package and the moisture in the air. This avoids oxygen from entering the packaged items through moisture, thereby reducing the possibility of oxidation reactions occurring in products such as food and medicine. Meanwhile, the low-temperature environment under vacuum conditions can also inhibit the growth and reproduction of microorganisms, thus extending the preservation period of products.

However, it's not easy to achieve truly non-oxidative preservation. Firstly, even with a fully automatic vacuum packaging machine, it's impossible to completely remove the oxygen inside and outside the package. Especially when there are defects in the packaging materials or the sealing structure, oxygen may seep into the packaged items through tiny gaps. Secondly, when the quality of the packaged items is poor or the storage conditions are improper, oxygen may also enter the inside of the packaged items through the air permeability of the packaging materials, resulting in the oxidation and deterioration of the products.

In addition, the fully automatic vacuum packaging machine itself also has some limitations. For example, for some products, the sealing effect may not be completely airtight, making it difficult to remove the oxygen inside the package, thus affecting the preservation effect. Moreover, some foods or medicines that are prone to oxidation reactions may still be oxidized even in a vacuum state, because other factors such as temperature and light also affect the oxidation of products.

To sum up, the fully automatic vacuum packaging machine can achieve a relatively good preservation effect and extend the shelf life of products to a certain extent, but it's not easy to achieve a truly non-oxidative preservation effect. Only when it is used and stored reasonably and other measures such as controlling temperature and keeping dry are taken can the products be better protected from the influence of oxidation. Therefore, manufacturers of fully automatic vacuum packaging machines recommend that when using vacuum packaging machines, other preservation measures should also be combined to maximize the extension of the shelf life of products.