In order to keep the food fresh and preservative, it will be vacuumed in the food packaging bag, and there is no other oxidized food, which can extend the shelf life of the food and prevent the food from being squeezed during transportation. What should we pay attention to when choosing plastic packaging bags, and what should we pay attention to during transportation?
1. The puncture resistance of plastic bags after vacuum. Whether it is shipping packaging or selling packaging, one of the important functions of packaging bags is to maintain food. If most of them were punctured, they would not be able to maintain. So we need to know whether our products have sharp and hard substances, and what level of puncture can reach. In the normal method, let the packaging manufacturer supply the samples, test it by vacuum packaging, and then throw, throw, press, etc., and then see if there is a broken bag.
2. In what environment is the vacuum bag used? Including processing environment, storage environment, transportation environment, different environments require different plastic films and printing processes. For example, the ready-to-eat brine duck feet, after vacuum packaging, choose high temperature sterilization and water sterilization, and the requirements for the packaging materials are different. High temperature sterilization requires that the plastic film be resistant to high temperatures above 121 ° C, and water sterilization requires high temperature resistance of 100 ° C, and it is not soluble in high temperature environments and has strong water resistance.
3. Maintain other food needs. Vacuum bags are used for food to extend the shelf life and better preserve its color, fragrance and taste. In addition to the need for puncture resistance, there are many other functional requirements. For example, salt-baked chicken legs and salt-baked chicken wings will have oil and aromatic molecules. Plastic bags must have oil resistance and aroma retention.