Shelf life.shoe storage shelving unit

　　The meaning of shelf life is the period during which an item can be stored and maintain its useful value. The term shelf life is more commonly used in the food industry, but people have different understandings and interpretations of it. Consumers are concerned about shelf life by knowing how long food can be stored after purchase; Retailers are interested in how long food can be stored on shelves, as this is related to their commercial interests. A more complete definition of food shelf life is the period during which food can maintain its safety and suitability for consumption under specified storage conditions after production and packaging. This means that during this period, food can maintain its sensory, physicochemical, functional, microbial and other characteristics, and when stored under recommended conditions, it can maintain the nutritional value indicated on the label. The shelf life of food is more commonly used in China.

　　The shelf life depends on product quality, packaging materials, packaging methods, and circulation environment conditions.

　　(1) Packaging materials

　　If the product is packaged with non permeable materials (such as glass or metal), generally the product deteriorates mainly due to its own chemical changes, and the packaging has little impact on the effective shelf life of the product. However, there are also cases where the quality of products is reduced due to packaging. For example, the light transmission of glass containers can accelerate the oxidation of products, and for example, metal Canning may react with the internal coating or even metal body materials with poor product quality. If semi permeable and permeable materials are used, the packaging method has a significant impact on the shelf life of the product.

　　(2) Product sensitivity

　　The characteristic of a product that deteriorates due to various factors is called product sensitivity. The sensitivity of different products varies greatly.

　　If crispy food becomes soft due to increased humidity; Tobacco changes its combustibility due to reduced humidity; Fried foods and fatty meat products produce a hala flavor due to oil oxidation; Fast food deteriorates due to changes in temperature and time.

　　A scientific match should be made between the protective performance of packaging materials and product sensitivity to ensure that the packaging plays a crucial role within its validity period.

　　(3) Product quality discrimination standards

　　Develop criteria for identifying qualified products based on the type of product deterioration. This standard must be based on the situation of certain key components in the product, and indicators reflecting product quality can be obtained through analysis and testing. The quality qualification criteria of any product affect the determination of packaging validity or shelf life. Some consumer products require both data-driven qualification standards and certain sensory standards that most customers agree with.

　　The determination of the packaging validity period should be based on the validity test results of the batch of products.

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