Factors that determine the thickness of the stretch film

1. According to the number of allowable microorganisms per unit volume or unit surface area, this method is mainly suitable for anti-mildew packaging that is very sensitive to microorganisms, and its key is to determine the type of microorganisms of the product and the law of their reproduction and growth.
2. According to the allowable water absorption of the packaged product or the allowable dehydration of the product, the method is mainly adapted to the moisture-proof packaging design of the product, and its key is to calculate the moisture permeability coefficient of the material.
3. According to the allowable oxygen absorption of the packaged product, this method is mainly suitable for product barrier packaging that is very sensitive to oxygen, and the key is to calculate the oxygen permeability coefficient of the stretch film.
4. According to the amount of carbon dioxide permeability or oxygen permeability allowed by the product to determine, the method is mainly for the inflatable insurance packaging of the product, the product with declared activity requires both oxygen insurance or maintaining bright color, and requires high concentration of carbon dioxide to inhibit the growth and reproduction of microorganisms, the key is to calculate the oxygen permeability coefficient and carbon dioxide permeability coefficient of the stretch film.