The vacuum packaging bag is composed of several plastic films with different functions through the process of compounding together, and each layer of film plays a different role.
Vacuum packaging bags are divided into transparent vacuum bags and aluminum foil vacuum bags. The composite material of vacuum packaging bags is a composite of PE and nylon. Nylon has good barrier properties, can effectively block moisture and gas, and can maintain a vacuum state for a long time. The plastic bags in China are just ordinary plastics. There are air holes on the surface of such plastic bags, so they cannot be vacuum-packed.
If you want to keep the freshness of food for a long time, you can’t achieve it by vacuuming, because when the oxygen concentration in the packaging bag is ≤1%, the growth and reproduction speed of microorganisms will drop sharply, and when the oxygen concentration is ≤0.5%, the large Most microorganisms will be inhibited and stop breeding, but vacuum packaging cannot inhibit the growth of anaerobic bacteria and food deterioration and discoloration caused by enzyme reactions, so it needs to be combined with other auxiliary methods, such as refrigeration, quick freezing, dehydration, high temperature sterilization, radiation, etc. Photo sterilization, microwave sterilization, salt pickling, etc.
For more information, please visit our website: https://www.gdokpackaging.com/
Post time: Jul-08-2023
