Importance of sealing performance of cosmetic tube packaging materials
There is no doubt that the primary function of a cosmetic tube is to protect the contents. The ingredients of cosmetics are added with substances required for the growth and reproduction of microorganisms, such as glycerin and protein. However, after being contaminated by microorganisms, cosmetics become malodorous, deteriorated, and moldy. The quality of the product has declined. Water and oxygen are factors that affect the growth of microorganisms. Most cosmetics contain oils and fats. Unsaturated bonds in oil are easily oxidized and cause deterioration (rancidity). Moreover, this oxidation is a chain reaction. As long as a small part of the cosmetics starts to oxidize, it will cause the complete deterioration of the oil. At the same time, it will produce hydrogen peroxide, acid, aldehyde and other substances that have a stimulating effect on the skin, releasing a rancid smell. Oxygen is the main external cause of rancidity. Without oxygen, oxidation will not occur, leading to rancidity. The increase of moisture will also cause the hydrolysis of oil and accelerate the auto-oxidation reaction. In addition, water will provide a living environment for microorganisms and reduce the activity of certain antioxidants. The preservation of aromatic gases is the focus of cosmetic packaging. For some cosmetics, the aroma gas itself is the real “product”. If the aromatic gas disappears, the “product” actually sold will disappear. Therefore, preventing the loss of odor is very important for cosmetics.
It can be seen that anti-corrosion, anti-oxidation, and prevention of odor loss are the key points of cosmetic preservation. The following tests should be performed on cosmetic packaging: the gas penetration rate of the packaging material, the gas content in the packaging, whether the packaging is intact, that is, the protective performance of the packaging material, the gas analysis of the headspace in the package, and the sealing performance of the packaging material .
Post time: Aug-15-2020