According to the number of layers of plastic film, plastic vacuum bags can be divided into two categories: single film and composite film. The subdivisions can be divided into one, two, three, four, or even 10 layers. Vacuum bags are widely used in transportation packaging and sales packaging. So how do we choose plastic vacuum bags after all? Today, the packaging bag is recommended for us to select the key

1. The puncture resistance of the plastic bag after being vacuumed. Whether it is to transport packaging or to sell packaging, one of the important functions of packaging bags is to maintain food. If most of them are pierced, there will be no maintenance. So we need to know whether our products have sharp and hard substances, and what level can be reached by puncture. In the ordinary method, ask the packaging manufacturer to supply samples, test it by vacuum packaging, and then throw, throw, press and other methods, and then  Seal Bag Packaging Pouch check whether there is any broken bag phenomenon.

2. In what environment is the vacuum bag used? Including the processing environment, storage environment, transportation environment, different environments require different plastic films and printing processes to be selected. For example, ready-to-eat brine duck feet, after vacuum packaging, select high temperature sterilization and water boiling sterilization, the material requirements for the packaging bag are different. High temperature sterilization requires that the plastic film is resistant to a high temperature of 121°C or higher, and boiling sterilization requires a high temperature resistance of 100°C, and it is not water-soluble in a high temperature environment, and the water resistance should be strong.

3. Maintain other food needs. The use of vacuum bags for food is to extend the shelf life and better preserve its color, aroma and taste. In addition to puncture resistance, there are many other functional requirements. For example, salt-baked chicken drumsticks and salt-baked chicken wings will have oils and aromatic molecules. Plastic bags must have oil resistance and aroma retention.