In recent years, with the development of the economy and people's pursuit of beauty, cosmetics, as a product that can achieve cleaning and beautification effects, have received strong demand from men, women, and children, and the beauty industry in China has flourished. At the same time, China's cosmetics have greatly improved in terms of product quality and styling design, especially some domestically produced cosmetics, which are known as "new national products" with quality no less than similar imported products and are warmly sought after by people. At the same time, in recent years, cosmetic quality issues such as excessive levels of microorganisms and heavy metals, and insufficient efficacy have emerged one after another, attracting strong attention from people.
Due to the fact that cosmetics are applied to human surfaces such as skin, hair, nails, lips, etc. through brushing, spraying, or other similar methods, their safety is particularly important. Therefore, it is necessary for us to evaluate the safety of cosmetics. Cosmetic packaging is a container and material used in the production, transportation, and sales processes to protect cosmetics, facilitate storage and transportation, and promote sales. The primary packaging of cosmetics is the packaging container material that directly comes into contact with cosmetics. Cosmetic packaging includes materials such as metal, glass, ceramics, plastic, rubber, etc., and plastic is currently the most widely used cosmetic packaging material. It has the characteristics of light weight, low price, excellent mechanical properties, easy forming and transportation, and good printability. It can be processed into packaging such as bottles, caps, bags, hoses, boxes, etc. Cosmetics have solid, semi-solid, liquid, lotion, solution, paste, block and other forms. People can choose different plastics according to the form of cosmetics and product shape.
At present, commonly used plastics include materials such as HDPE, PET, PP, PVC, PS, PMMA, etc. When choosing plastic as the primary packaging, additives such as stabilizers, antioxidants, and plasticizers are added during the processing process to meet performance requirements, and adhesives are also used when producing multi-layer composite materials. The presence of these substances can bring potential risks to the use of plastic. In addition, due to the complex composition of cosmetics and the presence of large amounts of alcohols, acids, proteins, and oils, they have certain interactions with plastics. For general cosmetics, their shelf life and usage time can be up to 1-2 years.
Long term contact between cosmetics and plastics may lead to the migration of monomers, additives, volatile substances, harmful substances, etc. inside the plastic, causing cosmetic pollution and harm to the human body. Alternatively, chemical reactions between the substances inside the cosmetics and plastics may worsen the properties of the plastics, leading to a decrease in the stability and quality of the cosmetics and deterioration. Therefore, when using plastic products as packaging materials for cosmetics, it is necessary to consider the safety of plastic packaging. |