Study on Utilization Technology of Waste Plastics from Municipal Solid Waste

摘要

Waste plastics as valuable and recyclable resources, can be made into high quality plastic material products by recycling. But it is difficult to have uniform and appropriate pre-processing techniques, resulting in a low recovery rate of waste plastics, low quality plastic product materials and other problems, because of plastic types, plastic colors and other reasons. In this paper, factors that affect the quality of plastic products were studied, including sorting, crushing and washing pretreatment techniques of waste plastics, and multi-factor effects of crushing granularity and VCM content on the physicochemical properties of recycled plastic were as key researches. Experimental results show that, impurity particle numbers of PVC profile products were less than 12 Ge/900cm2, which were better than the requirements of high-class products of corresponding SG3 model, 16 Ge/900cm2, in the national standard GB5761-1993, and the utilization rate of the water cycle was more than 90%, with good environmental protection benefits and great application values.