Modified Atmosphere Film​

Modified atmosphere film is a kind of functional packaging material. It achieves the preservation and protection of packaged items by regulating the gas environment inside the package. It is widely used in the packaging fields of food, agricultural products, and some industrial products.​

Working Principle​
Modified atmosphere film has the characteristic of selective gas permeability. It allows different gases to pass through at specific rates. For example, it can let gases such as oxygen, carbon dioxide, and nitrogen enter and exit the package in a certain proportion. When packaging food, the modified atmosphere film can adjust the internal gas composition according to the characteristics of the packaged food. Generally, it reduces the oxygen content to inhibit the growth and reproduction of aerobic microorganisms and the oxidation reaction of food. It appropriately increases the carbon dioxide concentration to inhibit the growth of bacteria and regulate the respiration of food, thus extending the shelf life of food.

Modified Atmosphere Packaging Film, abbreviated as MAP Film, is a kind of functional material that plays a crucial role in the modern packaging field. Its unique gas barrier and regulation properties can significantly change the gas atmosphere inside the package, thus achieving the goals of extending the product's shelf life and maintaining its high quality.​

I. Working Principle​
The magic of the modified atmosphere packaging film lies in its selective gas permeability. It is like an intelligent guard, allowing specific gases such as oxygen (O₂), carbon dioxide (CO₂), and nitrogen (N₂) to permeate through itself at different rates. During the packaging process, the initial gas ratio inside the package is carefully adjusted according to the characteristics of the product to be packaged.​

For example, in the packaging of fresh meat, high - concentration oxygen will accelerate the oxidation of meat products, darken the color of the meat, and also promote the growth of microorganisms. At this time, the modified atmosphere packaging film will reduce the oxygen content and appropriately increase the carbon dioxide concentration. Carbon dioxide can effectively inhibit the reproduction of bacteria and other microorganisms, slow down the deterioration speed of meat products, and keep the fresh meat in a fresh - colored and tender - textured state for a longer time. For fresh fruits and vegetables, the modified atmosphere packaging film can precisely regulate their respiration. By skillfully controlling the inflow and outflow of oxygen and carbon dioxide, the ripening and aging processes of fruits and vegetables are delayed, enabling them to always remain plump, juicy, brightly - colored, and with well - preserved nutrients.