Products stored in aluminum foil bags generally have a short shelf life under natural conditions, and need to rely on vacuum or aluminum foil bags to extend the shelf life. However, the aluminum foil bag sometimes swells due to various reasons, so how to solve it?
1. Factors of aluminum foil bag
One of the important reasons for the expansion of aluminum foil bags is the quality problems.
The first is the airtightness of the aluminum foil bag. Bag sealing is the last process of bag making. If the final side of the bag is not closed tightly, it will cause the food aluminum foil packaging bag to leak. Gas may infiltrate into the plastic packaging bag from the leaking position of the aluminum foil packaging bag, causing the bag to expand.
For bag swelling caused by this reason, production parameters need to be adjusted to control the heat sealing strength during production. After the heat sealing is completed, instruments must be used for testing. If bubbles are found to be exposed from the edge of the packaging bag, it indicates air leakage and needs to be reformed. .
Secondly, because the aluminum foil bag itself has metal properties, it is prone to wrinkles during storage and use. Such wrinkles will cause small holes in the bag and the aluminum foil bag will leak air. Therefore, in the process of storage and use, pay attention to the placement of aluminum foil bags to avoid folds.
2. Food spoilage
There is another important factor for air leakage in food aluminum foil packaging bags, which is food deterioration. If the food is not fully disinfected during the production process, or the aluminum foil bag is filled with liquid, long-term storage will cause bacteria to multiply and produce gas, causing the aluminum foil bag to expand and the food inside to deteriorate.