PET (PolyEthylene Terephthalate) is one of the most widely used plastics. It has good ductility, high transparency, and good safety. It is often used to make beverage bottles or other food packaging materials. . In my country, rPET (recycled PET, recycled PET plastic) made from recycled beverage bottles can be reused in automobiles, daily chemicals and other fields, but it is not currently allowed to be used in food packaging. In 2019, the weight of beverage PET bottles consumed in my country reached 4.42 million tons. However, PET takes at least hundreds of years to completely decompose under natural conditions, which brings a great burden to the environment and economy.