The functions and roles of food packaging bags mainly include:

Preservation: The food packaging bag can seal the food and keep it fresh, reduce the contact between the food and the outside air, moisture, bacteria, etc., and extend the freshness and shelf life of the food.

Moisture-proof: The food packaging bag is made of sealed materials, which can effectively prevent the intrusion of air and moisture, maintain the dry state of food, and prevent food from being spoilt by moisture.

Anti-oxidation: Some food packaging bags are made of materials with antioxidant effects, which can slow down the oxidation rate of food and maintain the color and nutrition of food.

Anti-mildew: some food packaging bags have antibacterial function, which can effectively inhibit the growth of food mold and bacteria and extend the shelf life of food.

Easy to carry: Food packaging bags are usually light and easy to carry, which can facilitate consumers to carry food out, travel or dinner.

Food packaging bags play an important role in preservation, moisture-proof, anti-oxidation, anti-mildew, etc., which can protect the quality and safety of food and facilitate the use of consumers.