How to check the package air tightness of Cosmetic Tube?

The barrier effect of packaging materials on gas, liquid and other penetrable substances through packaging materials is called the barrier of packaging, the quality of the barrier has a great impact on the quality of the shelf life of the product, so it is a very important item in the packaging inspection, mainly including oxygen permeability, moisture permeability and organic gas permeability, not to mention the importance of the packaging barrier of the cosmetic hose. Now expensive cosmetics if the barrier of the packaging is not qualified, the loss to consumers is huge, but also has a great impact on the reputation of the product brand, so how to test the packaging air tightness of the cosmetic tube?

The oxygen permeability test of the cosmetic tube is mainly used for the determination of the oxygen permeability of the film, composite film, cosmetic bag or bottle used in the Cosmetic Packaging. At present, the two methods used to test the oxygen permeability of the cosmetic hose - differential pressure method and isobaric method - can detect the oxygen permeability of the film and the overall oxygen permeability of the packaging material, but the detection requirements are different, and the pressure differential method has no requirements for the detection of gas. Can be used to detect the permeability of any gas, but the detection of cosmetic hose packaging is still in its infancy, isobaric membrane detection technology and container detection technology has been relatively mature, but there are still some limitations in the gas detection, the air tightness of cosmetic hose sealed packaging mainly refers to whether there is a ventilation in the package, Leakage means that the gas leaks or enters the packaging through the cracks, microholes or tiny gaps between the two materials, the probability of leakage in the hot seal position of the packaging bag and container bottle mouth is very high, to solve this problem, we must strictly control the production process of cosmetic hose packaging, and adjust the process according to the test data, the commonly used detection methods are positive pressure method and negative pressure method, among which, The application of the positive pressure method should be of particular concern because the test method can not only detect the sealing performance of ordinary packaging, but also expand the test object's accessories, for example, samples such as hoses, spray heads, caps and open packages can be detected by adding test accessories.