Why is the fresh-keeping card in bread a card

The fresh-keeping card in bread is actually a kind of alcohol-keeping card, which is often called the external control food-keeping card. When in use, a gas phase protective layer with a certain concentration can be formed around the fresh-keeping food, which is not affected by the PH value of the fresh-keeping food.

The function of fresh-keeping card in bread is moistureproof and moistureproof. Because of its dual functions of contact sterilization and fumigation sterilization, it can inhibit the growth of various molds, bacteria and spoilage bacteria, thus achieving good preservation effect.

The principle of fresh-keeping is to form a gas protective layer with a certain concentration around the food in the package through the slow release of fresh-keeping gas to inhibit and kill a variety of spoilage bacteria such as molds and bacteria, and at the same time combine with free water in food to reduce its water activity, which is an important factor affecting the shelf life of food, so as to achieve the purpose of fresh-keeping.