Plastics play an indispensable role in daily life and production, and their widespread use undoubtedly brings great convenience to our lives. However, the resulting problem of plastic waste has become increasingly prominent, and the resulting "white pollution" has become a major challenge in environmental governance. To more effectively address this issue, we need to have a deeper understanding of plastic classification. This understanding will not only help us use plastic products more rationally, but also promote plastic sorting and recycling, thereby contributing to the reduction and effective control of environmental pollution.