Common forms of flexible packaging:
1, Ordinary plastic flexible packaging: It’s not filled with any gas or vacuum treatment of the bulk form, according to the packaging material added to the barrier material, to meet the needs of the unused shelf life.
2, Plastic flexible packaging with air: Put the air into finished packaging, to prevent puffed food is crushed. Generally choose a material with better toughness to prevent the body of the bag from breaking.
3, Nitrogen-filled plastic flexible packaging: use the nitrogen to prevent fried puffed food oxidation deterioration, and the corresponding packaging materials have higher barrier of nitrogen and oxygen mostly use aluminum-plated composite film.