How does vacuum sealing keep food fresh?

The main function of vacuum packaging is to exclude oxygen, which helps prevent food from spoiling.

What causes food to spoil?

Mold and spoilage of food are mainly caused by the activity of microorganisms, and most microorganisms (such as mold and yeast) need oxygen to survive.

How does vacuum packaging prevent food spoilage?

Vacuum packaging uses this principle to extract the oxygen in the packaging bag and food cells, so that microorganisms lose their living environment.

Experiments prove that:

1. When the oxygen concentration in the packaging bag is ≤1%

The growth and reproduction rate of microorganisms will drop sharply.

2. When the oxygen concentration is ≤0.5%

Most microorganisms are inhibited and stop multiplying.

  (Note: Vacuum packaging cannot inhibit the growth of anaerobic bacteria and food deterioration and discoloration caused by enzyme reactions, so it must be combined with other auxiliary methods, such as refrigeration, quick freezing, dehydration, high temperature sterilization, irradiation sterilization, microwave sterilization, salt pickling, etc.)