Since its birth, plastics have become an indispensable part of people's lives due to their light weight, low manufacturing costs, and strong plasticity. Together with steel, wood, and cement, they have become the basic materials for modern economic and social development. But at the same time, the environmental problems brought by plastics have also received extensive attention from all walks of life. In recent years, my country has attached great importance to the control of plastic pollution, taken a series of actions, carried out a lot of fruitful work, and established a relatively complete waste plastic recycling system, which ranks first in the world in terms of waste plastic recycling.