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Cosmetics 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 contacts cosmetics. Cosmetics packaging is made of materials such as metal, glass, ceramics, plastic, rubber, etc., and plastic is currently the most widely used cosmetic packaging material.

At present, commonly used plastics include HDPE, PET, PP, PVC, PS, PMMA and other materials. When choosing plastic as the primary packaging, stabilizers, antioxidants, plasticizers and other additives are added during the processing to meet performance requirements, and adhesives are also used in the production of multi-layer composite materials. The presence of these substances can pose potential risks to the use of plastic. In addition, due to the complex composition and high content of alcohols, acids, proteins, and oils in cosmetics, they have certain interactions with plastics. For general cosmetics, their shelf life and usage time can reach 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 pollution and harm to the human body. Alternatively, chemical reactions between the substances inside the cosmetics and the plastic may deteriorate the properties of the plastic, resulting in a decrease in the stability and quality of the cosmetics, leading to deterioration. Therefore, when using plastic products as packaging materials for cosmetics, it is necessary to consider the safety of plastic packaging.