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. Semi-Metallic Bicycle Brake Pads Bicycle Brake Shoes,Bicycle Disc Pads,Disk Brake Pads For Bikes,Semi-Metallic Bicycle Brake Pads Wenzhou Tuxing Automobile and Motorcycle Parts Co., Ltd. , https://www.txmotorparts.com
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; unsaturated bonds in oils are easily oxidized and cause rancid degeneration, while producing 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 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 Testsâ€. Regulations shall be carried out so that the permeation rate of oxygen in multilayer pipes must not exceed 10cm3/(m2?24h?0.1MPa).
It can be seen that this standard only 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 cosmetic packaging and the oxygen permeability of the tube directly affect the storage life of the cosmetics and the changes of the original nature, it is an indicator that related companies must pay attention to and control.
The standard "GB/T 31354-2014 Coulometric Test Method for Oxygen Permeability of Packages and Containers", published on December 31, 2014 in China, describes the use of a coulometric sensor to measure the dryness. Standard Test Method for Oxygen Transmission of Packages. The brief introduction is as follows: First, the tube to be tested is fixed on the test fixture with a sealant, and after being placed for a certain period of time, the sealed specimen is fixed on the test equipment. The air inside the tube was slowly purged with a stream of nitrogen. The outer surface of the tube was in an environment with a known oxygen concentration, i.e., an indoor environment of 20.8% oxygen content or an environment of 100% oxygen content. Oxygen enters the nitrogen carrier gas through the pipe and is carried along with the nitrogen carrier gas flow to the Coulomb power sensor. Oxygen passing through the sensor generates a current, which is proportional to the amount of oxygen carried to the power sensor per unit of time. From this, the overall oxygen permeability of the tube can be obtained, which in turn can better determine the shelf life of the product.
Cosmetics are in direct contact with human skin, and their quality will directly affect the health of the human body. In order to ensure the product quality and ensure the service life, to ensure the second life of the product, it is very important to test the oxygen permeability of the hose sheet and the molded tube body.
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