Food grade plastic film categories are generally divided into ordinary food packaging film, vacuum food packaging film, inflatable food packaging film, boiled food packaging film, steamed food packaging film and functional food packaging film, etc., the material is also diverse, common food grade plastic film materials are: PE (polyethylene), aluminum foil, nylon and composite materials. In order to ensure that food is fresh and disease-free, no matter the category and material have some common characteristics, first, it is required to completely block organic solvents, fats, gases and water vapor; Second, it has excellent permeability resistance, moisture resistance, cold resistance, heat resistance, light resistance and insulation, and has a beautiful appearance; Third, it is easy to form and low processing cost; Fourth, it has good strength, the strength of the plastic packaging film per unit weight is high, impact resistance, easy to modify.
