re:Physical protection

Physical protection
Stored in the bag of food need to avoid extrusion, impact, vibration, temperature and other phenomena
2 shell protection
Shell can make food and oxygen, water vapor, stains, etc., prevent leakage is also a necessary factor in packaging design. Some packages include desiccant or deoxidizer to extend shelf life. Vacuum packaging or removal of air in the bag is also a major food packaging method. Keeping food clean, fresh and safe during the warranty period is the primary function of the package.