over door wire storage rack.Shelf life and daily maintenance knowledge

　　Shelf life is a frequently used word in supermarkets, and it is a very important technical indicator in the food industry and packaging industry. The fresh area in the supermarket is an area that attracts large passenger flow. How to effectively extend the shelf life of the goods and maintain the freshness is one of the most important issues. A product from production and packaging to circulation and sales, under the specified environmental conditions, to maintain quality and consumption safety time commitment. Obviously, shelf life is critical to a manufacturer's reputation and to consumer health and safety.

　　When shopping, people will look at the shelf life, has not expired, not only the food has a period of use, items also have, shelf products also have a characteristic service life. The shelf life of food refers to the best use period of food, that is, the period of maintaining food quality (quality) under the conditions specified on the food label. During this period, all indicators of the food (sensory requirements, physical and chemical indicators, health indicators) meet the requirements of the label or product standards. Food is a pluralistic, active complex system, and food quality related to microbial proliferation, enzyme reaction, physical and chemical changes will occur at the same time, and some external conditions such as temperature, humidity will also affect the conduct of these reactions, so the service life of the food shelf factors are mainly food chemical composition, processing technology, packaging form and storage conditions. To determine the shelf life of a specific food, it is necessary to study the mechanism of quality loss in the storage process of the product, determine the main factors affecting the change in product quality, determine the key indicators for the end of the shelf life, and establish the corresponding test methods and appropriate models to determine the service life of the shelf.

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