Therefore, everyone should be more cautious when choosing food plastic bags. Breathing requirements: Some exported foods, such as fresh fruits and vegetables, still maintain breathing function during packaging and storage. Safe use is to ensure that consumers will not be harmed during the opening and eating process. So, what conditions should the packaging bag meet? What conditions do food packaging bags need to meet? From the perspective of packaging performance, food packaging bag requirements can be divided into two parts: internal and external:Nutritional requirements: Food will gradually lose nutrition during packaging and storage. The barrier substances are air, Wholesale Aluminum Foil Bags water, grease, light, microorganisms and so on. Promotional requirements: Food packaging is one of the main means of food promotion. Only in this way can the role of packaging bag design be fully utilized. In addition, the requirements of food plastic bag packaging are different from ordinary plastic bag packaging, and are more standard and strict. Hygiene and safety means that food packaging materials should not contain substances harmful to the human body; in terms of packaging technology, the nutrition, color, and taste of the processed food should be kept as unchanged as possible. Due to poor barrier properties, the flavor and quality of the food change, which affects the quality of the food.Strength requirements: the packaging can protect the packaged food against various destructive forces, such as pressure, impact, and vibration, during storage, stacking, transportation, and handling.The barrier requirements are determined by the characteristics of the food itself, and its characteristics include external barriers, internal barriers or selective barriers. Moreover, packaging bag design not only involves the two academic fields of technology and art, but also involves many other related disciplines in their respective fields.