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Factors That Determine The Thickness Of The Stretched Film

Stretch film is widely used in the logistics industry. It is mainly used to package various goods. Considering the packaging cost and performance requirements, the thickness of the stretch film should be carefully weighed. What are the factors that determine the thickness of the stretch film?

1. According to the unit volume or unit surface area, the number of microorganisms is allowed to be determined. The method is mainly suitable for the mold-proof packaging which is very sensitive to microorganisms, and the key is to determine the type of microorganisms and the law of reproductive growth.

2. According to the allowable water absorption of the packaged product or the allowable dewatering amount of the product, the method is mainly adapted to the moisture-proof packaging design of the product, and the key is to calculate the moisture permeability coefficient of the stretched film.

3. According to the allowable oxygen absorption of the packaged product, the method is mainly suitable for the product barrier packaging which is very sensitive to oxygen. The key is to calculate the oxygen permeability coefficient of the stretched film.

4. According to the allowable amount of carbon dioxide or oxygen permeation allowed by the product, the method is mainly for the inflation insurance package of the product, and the product with declared activity needs oxygen insurance or maintains vivid color, and requires high concentration of carbon dioxide to inhibit microorganisms. The key to the growth and reproduction is to calculate the oxygen permeability coefficient and the carbon dioxide permeability coefficient of the stretched film.

The above factors for determining the thickness of the stretched film are shared here. The thickness of the stretched film is mainly determined by the packaging purpose and the shelf life of the product, and then the thickness is determined according to the thickness of the material and another packaging purpose. The theoretical shelf life of the packaging to verify the rationality of the design of the stretch film packaging.