There are mainly three kinds of recycling methods for used plastics:
(1) Melting method, that is to say, the waste plastics are remelted and plasticized into products. The law can be divided into simple regeneration and composite regeneration. The performance of pure recycled products is better; the composite recycled plastic products have different compatibility due to different proportions of various plastics, so that the quality of the products is not constant and the performance is poor.
(2) Thermal decomposition method, that is to say, the waste plastics are heated and decomposed into fuel oil or fuel gas after sorting. This method has been widely used, but the process is complicated and the processing cost is high.
(3) Combustion method, that is to say, waste plastics are burned to recover the heat released by their combustion. The law has not yet been fully utilized, and the smoke generated from the combustion of waste plastics will cause secondary pollution.
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