There are basically two main sources of waste plastic production, one is from plastic products molding processing plant, thermoplastic resin directly processed molding or processed into products after mixing of ingredients inevitably appear waste products, defective products, offsets, waste materials, test materials and mixtures.

Another kind is to use and consumption process from all kinds of plastic products, domestically, are mainly agricultural commodity plastics, packing plastics, three areas, due to its wide use bedding face, use frequency is high, and strong randomicity, most of the mixed with soil living garbage, composition is complex, difficult to recycle, white pollution is mainly caused by this kind of waste plastics.

With the increasing awareness of environmental protection and the progress of science and technology, more and more new technologies have emerged to help us recycle plastic