1. Gas flushing gas replacement For food and beverage products, nitrogen is usually used to reduce the amount of ambient oxygen in the packaging, because this gas will increase the rate of product deterioration. Nitrogen flushing is a common method used by many customers. This can happen inside the packaging itself as well as in the steps leading to the packaging, for example inside the filling equipment. During this process, nitrogen is actively pumped in to replace oxygen.
■ Replace oxygen to delay oxidation
■ Reduce the growth of aerobic spoilage bacteria
■ acts as a filler to maintain the consistency of the package
2. Barrier packaging film Barrier packaging film Choosing a specific packaging film that provides enhanced protection is another method of modified atmosphere packaging. This is achieved through the use of barrier packaging materials that have reduced moisture and oxygen permeability, such as low-density polyethylene (LDPE), polyvinyl chloride (PVC) or polypropylene (PP). What's new in the market is "smart" packaging films, which can contain indicators such as temperature, leakage, and food quality.
3. Scavenger or desiccant package scavenger, another example is to add oxygen scavenger or desiccant package to the package. These small bags usually contain a mixture of iron powder and ascorbic acid, and sometimes activated carbon. These ingredients act as catalysts or activators, absorbing surrounding moisture and oxygen, thereby removing them from the inside of the packaging that contains the perishable products.
4. Adding an exhaust valve on the packaging bag is another method. These special valves can be added to the roll film during the packaging process. The one-way valve allows some gas to escape from the package without allowing any outside gas to enter. This is usually done to release the pressure generated by the gas released by the product, but it can also be done to allow the air to escape from the package for better stacking and stacking.
How does modified atmosphere packaging protect food?
To a large extent, modified atmosphere packaging technology protects fresh food by reducing its exposure to oxygen. Oxygen can cause oxidation, which can lead to discoloration, deterioration, odor and texture. By reducing or controlling the oxygen content in the packaging, food can maintain longer-term freshness, extend its shelf life, and ensure that it remains attractive to consumers.