What are the technical advantages of food plastic packaging bags

From the aspect of packaging performance, the requirements of food plastic packaging bags can be divided into two aspects: internal requirements and external requirements: 1. The internal requirements of food packaging refer to packaging, so that food can achieve quality and quantity in its packaging. technical requirements, such as strength, barrier properties, plastic bag breathing, etc. 1. Strength requirements: It means that the package can protect the packaged food against various external destructive forces, such as pressure, impact force and vibration force, during storage, stacking, transportation and handling. There are many factors related to the strength requirements of food packaging, mainly including transportation mode (such as automobile, plane), stacking form (such as multi-layer stacking, cross-stacking) and environment (such as climate, sanitary environment) and other three types of factors. 2. Barrier property requirements: Barrier property is one of the important properties in food packaging. Many foods are stored and packaged, and the flavor and quality of the food change due to poor barrier properties, which ultimately affects the quality of the food. The barrier property requirements are determined by the characteristics of the food itself, which are characterized by external barrier, internal barrier or selective barrier and so on. The substances that are blocked are air, water, grease, light, microorganisms and so on. 3. Respiratory requirements: Some exported foods, such as fresh fruits and vegetables, still maintain the respiratory function during the packaging and storage process. Therefore, such packaging materials or containers are breathable, or can control the respiration, so as to achieve the purpose of preservation. 4. Nutritional requirements: During the process of packaging and storage, food will gradually lose nutrients. Therefore, the packaging of food should be conducive to the preservation of food nutrition, and it is more ideal to lock nutrition through packaging. 5. Other requirements: There are many internal requirements for food packaging, such as heat resistance requirements, light protection requirements, anti-shattering requirements, moisturizing requirements, etc. 2. The external requirements of food packaging are to use packaging to reflect the characteristics, performance and image of food, which is the form and means of external visualization and expression of food, including the following aspects: 1. Safety requirements: the safety of food packaging Sexuality includes aspects such as hygiene safety, handling safety and use safety. Hygiene and safety means that food packaging materials should not contain substances that are harmful to the human body; in terms of packaging technology, the nutrients, color and taste of the processed food should be kept as unchanged as possible. Handling safety means that the packaging can ensure the safety during transportation, loading and unloading, and it should also include the safety of consumers picking up and carrying after purchase, and will not be easily damaged. The safety of use is to ensure that consumers will not be harmed during the opening and eating process. 2. Promotional requirements: Food packaging is one of the best means of food promotion. The performance, characteristics, eating method, nutritional content and cultural connotation of food can be promoted on the packaging. The promotion of food packaging includes: necessary information promotion, image promotion, color promotion, structure promotion, etc. 3. External requirements also include: convenience requirements, prompting requirements, interesting explanation requirements and emotional explanation requirements.
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