PET bottles are not only widely used for packaging carbonated beverages, drinking water, fruit juices, enzymes, and tea beverages. They are the most widely used beverage packages today, and they are widely used in many fields such as food, chemical, and pharmaceutical packaging. PET plastics have a wide range of applications in the packaging field. PET plastics are used for packaging films, webs, and beer bottles. However, when these materials are discarded, they face the problem of how to deal with them. Every year, there are tens of billions of PET plastic bottles produced in China. It is estimated that by 2005, more than 500,000 tons of PET will be used for the manufacture of PET plastic bottles.