Factors affecting the food shelf period.boltless shelving steel shelf

　　(1) Microbial, physics, chemistry, temperature

　　(2) Packaging form and material

　　Soft packaging is more fragile;

　　Rigid packaging, spoils are mainly caused by their own chemical changes.

　　(3) Product sensitivity

　　The product has deteriorated due to various factors. Various products are very different, and they match the protection of packaging materials.

　　(4) Packaging size

　　The amount of material components increases through the amount of the packaging material, which increases with the size (area) of the size, and the volume of the product related to absorbing the amount of penetration is increased by the size of the size. Therefore, under the same conditions of other conditions, the requirements for blocking the packaging materials can be reduced as the product and the packaging size increase.

　　(5) Environmental conditions

　　The main factor in the product circulation process

　　1) What are the sensitivity of the product

　　2) The unfavorable environmental conditions to be experienced in product circulation

　　(6) Standard of product quality qualification discrimination

　　For the deterioration problems of various products, the criteria for determining the qualified product are determined according to the type. The criteria of qualified products must be based on some key components in the product.

　　For example, the key indicators of the protection capacity of packaging materials for products (resistance to specific factors) are::

　　For humidity -sensitive products, one water vapor transmission (WVTR): Edge rate of oxygen sensitive products (OTR); These indicators can be determined by analysis of gas chromatography, mass spectrometry, infrared spectrum analysis, and other technologies.

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