At present, there are many kinds of cosmetic packaging on the market. Only plastic materials include plastic bottles, plastic boxes, plastic bags, and plastic hoses. In recent years, with the increasing popularity of cosmetics, cosmetic plastic hose packaging has been developed rapidly with the advantages of less raw materials and low cost, and it has occupied the mainstream of the cosmetics packaging market, mainly used in cleansing products, skin care products, and beauty salon products, etc. . At present, plastic hoses commonly used in cosmetic packaging mainly include aluminum-plastic composite hoses, all-plastic composite hoses, and plastic co-extruded hoses, which can meet the various needs of cosmetic packaging.
Undoubtedly, the primary function of cosmetic packaging is the protection of content. The main components of cosmetics are oils, water-soluble polymers, and surfactants. It is well-known that glycerin, proteins, etc. are the material basis for the growth and reproduction of microorganisms, and oxygen and moisture are the factors that affect the growth of microorganisms; the unsaturated bonds in oils are easily oxidized and cause rancidity, and produce peroxides, acids, and aldehydes. And other irritating substances, and give off rancid odor. This shows that oxygen is the most important factor causing cosmetic deterioration. Therefore, cosmetic hoses need to have excellent gas barrier properties, can effectively prevent the infiltration of Clear Plastic Tubes oxygen and odor gases, and at the same time prevent the aroma of the contents and the exudation of active ingredients.
The standard “GB/T 29336-2012 Coextruded Multilayer Composite Hoses for Cosmetics” clearly states that the oxygen permeation of hoses shall be tested in accordance with the “GB/T1038 Method for Differential Pressure of Plastic Films and Sheet Gas Permeability Tests”. According to regulations, the oxygen permeability of multi-layer pipes must not exceed 10cm3/(m2·24h·0.1MPa).
It can be seen that this standard only Clear Plastic Tubes stipulates the detection of the oxygen permeability of the sheet, and there is no clear regulation of the oxygen permeability of the entire tube after the hose is made. Is it not necessary to detect it? The answer is no. Because the overall sealing performance of the cosmetic package and the oxygen transmission rate of the pipe body directly affect the storage life of the cosmetics and the changes of the original properties, it is an indicator that related companies must pay attention to and control.