[Internal Packaging Information] Fresh refers to primary foods that have not been cooked or further processed. Fresh products have a short shelf life and similar storage conditions. Fresh food includes frozen, frozen, fruits, vegetables, meat, aquatic products, dry goods and other foods. Traditional fresh packaging is mostly filled with fresh food in a fresh-keeping box and then covered with fresh-keeping film for wrapping. This type of packaging is often used to package good food, but in the actual sales process, due to a food shielding phenomenon in this type of packaging, bad businesses will take this opportunity to put fresh food that is about to rot or have damaged skin. Cover the box with plastic wrap. This situation will damage the rights and interests of consumers, and serious food safety problems will occur.

Intelligent packaging refers to the use of special structures, new materials and technologies, or the integration of originals in the process of packaging production, so that packaging meets the traditional packaging functions, and has functions such as product quality, safe distribution, and convenient use. A new type of packaging that actively intervenes and protects certain aspects to better realize the use and management function of packaging in the circulation process. Intelligent packaging can be classified into intelligent packaging of materials; intelligent packaging of structures; intelligent packaging of information. Intelligent packaging technology can be applied to the packaging of some special supplies such as food, daily necessities, pharmaceuticals, and express packaging. Intelligent packaging is more humane. It can improve user efficiency and obtain packaging information without obstacles. The definition of intelligent packaging is not absolute, it will change with the progress of the times. New technologies, new materials, and new expressions are constantly being updated and improved, and the concept and scope of intelligent packaging have become wider.

There are many types of energy-saving packaging technologies, which are widely used in packaging. Intelligent packaging in food packaging can detect the environmental conditions inside the packaging in real time through the use of special material's instruction labels. Provide food quality information. It can also extend the shelf life by changing the environmental conditions of packaged foods, thereby keeping the nutritional content of the foods from being damaged and ensuring the freshness of the foods. And multi-faceted packaging in the way of carrying information, so that food packaging has a traceable function.

· Intelligent instruction label

When food spoils, it is the result of a combination of internal and external factors. The main factors leading to food spoilage include the catalysis of food's own enzymes, the contamination of external microorganisms, and the effects of environmental temperature, humidity, and oxidation. Intelligent indication tags can be classified into: time and temperature indication tags and gas indication smart tags according to the response under different actions. The time and temperature indicator label is an indicator card attached to the outside of the package. The working principle of the time temperature indicator label is to record the temperature change experienced by the food during storage and sale, thereby predicting the quality of the food. The working principle of the gas indication smart label is: using the characteristic color reaction of certain characteristic gases released by food and specific reagents during the storage of food, causing the indicator to undergo significant changes, thereby helping consumers to be intuitive, accurate and scientific Judge food quality and freshness.

· Active Packaging Technology

Active packaging, also called AP packaging (Active Packaging), is to change the packaging environment (such as the concentration of oxygen and carbon dioxide, temperature, humidity and microorganisms) in food through the active ingredients in the material. Improve food safety and sensory characteristics, and effectively maintain food nutrition and flavor. Active packaging can extend the storage and transportation period and shelf life of food to a large extent, and it has the functions of bacteriostasis, sterilization, and control of temperature and humidity. The market has a great demand for active packaging.

According to the mode of action of active substances in active packaging, active packaging can be roughly divided into two categories: release active packaging and absorption active packaging. Release-type active packaging is used to remove substances such as oxygen, carbon dioxide, ethylene, excess moisture and the like. The main types of release-type active packaging are carbon dioxide-generating packaging, antibacterial packaging, and ethylene-generating packaging. Absorptive active packaging is the ability to add certain components to packaged foods or packages inside in a timely manner. The main types of absorption type active packaging are oxygen removal type, carbon dioxide removal type, ethylene removal type, and water removal type.

· Information traceability technology

The carrying capacity of traditional packaging for food information is very limited, and the information carrying medium provided on the outer packaging is not easy for consumers to read and search carefully. Once the packaging is discarded, it is accompanied by the loss of product information, which is difficult for consumers to retrieve. And when the product has a safety problem, because the traditional packaging information is incomplete, it cannot be traced back to the merchant to protect consumer rights and interests, and it is difficult for the merchant to recall the problematic goods that they circulate to the market.

Information traceability can rely on technologies such as bar codes, two-dimensional code technology, and radio frequency identification technology, which automatically identify product packaging through direct or indirect contact. Bar code technology mainly stores product information and merchant information in barcodes in digital form, so that customers can use mobile phone terminals to read information in a more convenient form. Common barcodes include 1D and 2D codes. In comparison, the two-dimensional code technology has many advantages such as high coding density, large amount of stored information, strong anti-counterfeiting function, and low cost. Information traceability technology can be widely used in high-end cosmetics, tobacco and alcohol, and food packaging. It can play an active role in product anti-counterfeiting, traceability, use and automatic logistics management, which is beneficial to consumers and safety supervision departments to understand and supervise Safe production of food.