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Cosmetic packaging materials are divided into several materials?

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Cosmetic packaging materials are divided into several materials?

General plastic
 
Generally refers to plastics with large output, wide application, good formability and low price. There are five major varieties of general-purpose plastics, namely polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) and acrylonitrile-butadiene-styrene copolymer (ABS).
 
20 engineering plastics
 
Generally speaking, it can bear a certain external force, has good mechanical properties, high and low temperature resistance, good dimensional stability, and can be used as engineering plastics, such as polyamide and polysulfone.
 
3. Special plastics
 
Generally refers to plastics with special functions that can be used in special applications such as aviation and aerospace. For example, fluoroplastics and silicones have outstanding special functions such as high temperature resistance and self-lubrication, and reinforced plastics and foams have special properties such as high strength and high cushioning properties. These plastics belong to the category of special plastics.