the usual ways to extend the shelf life of food are:
1 Cold storage
2 High barrier packaging bag
high barrier packaging bag has excellent isolation performance against external factors that may affect food quality, such as oxygen, water vapor and ultraviolet light
deoxidizer is a commonly used accessory package for food packaging. The principle is to use the substances in the deoxidizer to react with the oxygen in the packaging bag and consume oxygen, so as to inhibit the growth of bacteria on food
4. Food preservatives
food preservatives are additives that can prevent spoilage caused by microorganisms and prolong the shelf life of food. Because it has the function of preventing food poisoning caused by microbial reproduction, it is also called antimicrobial agent. Its main function is to inhibit the reproduction of microorganisms in food. At present, there are 30 kinds of preservatives specified to be used, such as benzoic acid, sodium benzoate, sorbic acid, potassium sorbate, calcium propionate, etc; However, food preservatives are related to food safety, so food manufacturers should use them carefully
5. Inflatable packaging
inflatable packaging generally uses nitrogen or carbon dioxide as the filling gas. The principle is that after filling the packaging bag with nitrogen and carbon dioxide, the content of oxygen can be basically reduced to zero, so as to inhibit the growth and reproduction of bacteria
6. External sterilization
in some puffed foods, in order to prevent food from moisture, some desiccants such as quicklime are often used, or doped with iron powder as double absorbent. Through the corrosion process of iron powder, the remaining water and nutrients in the packaging bag can be removed at the same time, so as to prolong the shelf life.
there are many ways to extend the shelf life. Considering the time and cost to be extended, you can choose appropriately!