PET plastic bottles are not only widely used to package carbonated drinks, drinking water, juice, enzymes and tea drinks. They are the most widely used beverage packaging and are widely used in many fields such as food, chemistry, and pharmaceutical packaging. PET plastics are used in a wide variety of applications, including PET plastics for packaging films, coils and beer bottles. But when these materials are discarded, they face the problem of how to deal with them. Every year, China produces tens of billions of PET plastic bottles. It is estimated that by 2005, more than 500,000 tons of PET will be used annually to make PET plastic bottles.