In the field of food packaging, we often see small food cardboards. They seem inconspicuous, but they have an indispensable and important role.
One of the key functions of food cardboard is preservation. Common food preservation cards use cardboard or cloth as carriers to absorb preservatives such as alcohol. Alcohol can evaporate in the packaging bag, filling the bag with low-concentration alcohol, thereby inhibiting bacterial growth and playing a role in mildew prevention and preservation. It can form a meteorological protection layer to inhibit the growth of microorganisms such as mold, bacteria and spoilage bacteria, and can also combine with free water in food to reduce water activity and extend the shelf life of food. It is widely used in food preservation such as cakes and dried fruits.
Food cardboard also has safe and reliable characteristics. Fresh-keeping cards are made of food-grade materials and meet food safety standards. Compared with powdered reagents, cardboard or cloth is covered with a film on the outside, and the probability of accidental ingestion is low. Its volatilization can form a low-concentration alcohol environment in the packaging bag, ensuring the preservation effect while ensuring that the food will not be contaminated.
In addition to the preservation function, food cardboard also plays other roles in packaging. For example, in some food packaging, it can be used as a logo to display relevant information about the food; some food cardboard itself has a certain decorative effect, which can enhance the visual beauty of food packaging and attract consumers' attention.
With the continuous development of the food packaging industry, the role of food cardboard has become more and more significant. It has unique advantages in preservation, labeling and beauty, and plays an important role in ensuring food quality and enhancing product attractiveness. In the future, its application in the packaging industry will be more extensive and diverse.