Application Technology Research Of Electronic Waste Plastic Shell

Waste electrical and electronic equipment, also known as e-wastes, refer to the electronic equipments no longer use. Due to electronic wastes contain gold, silver, copper, plastics and other renewable resources, their reuse attract wide attention both at home and abroad. As plastics are the second raw materials to metal in electric products, how to reasonably use them becomes one of the urgent problems of electronic waste recycling. In this paper, by comparing the utilization way of waste plastics at home and abroad and the test of waste PP and ABS scrap performance, a method of using waste PP to make wood-plastic composites and toughening modification of ABS scrap to make ABS/PMMA plastic alloys is presented.In the performance test of waste plastics, two kinds were determined by infrared spectroscopy, respectively PP and ABS. In terms of mechanical properties, impact strength of PP and ABS declines significantly, equivalent to52.7%and52%of the new materials. Compared to waste PP, ABS scrap’s decrease in elongation at break, flexural strength and flexural modulus is smaller. The tests show that waste PP has greater degree of aging and its performance drops significantly, thus using waste PP to make wood-plastic composites is proposed; while ABS scrap’s degree of aging is relatively small, and only the impact strength is significantly reduced, therefore toughening modification of ABS scrap to make ABS/PMMA plastic alloys is proposed.In the experiment of making wood-plastic composites. In terms of wood fiber dosage, with the increase of the dosage, wood-plastic composites’density,24h water absorption,24h thickness swelling and elasticity modulus increase, while the impact strength and static bending intensity decrease. In terms of compatilizer PP-g-MAH dosage, adding PP-g-MAH can improve the overall performance of wood-plastic composites. In terms of flexibilizer dosage, the toughening effect of POE is better than SBS. What’s more, as POE and SBS dosage increase, the impact strength of wood-plastic composites increases, while the static bending intensity and elasticity modulus both decrease.In the experiment of making ABS/PMMA plastic alloys. In terms of ABS powder, with the increase of the dosage, ABS scrap’s impact strength increases, while the tensile strength, bending strength and melt mass flow rate decrease. In terms of ABS/PMMA plastic alloy, with the increased use of PMMA. ABS/PMMA plastic alloy’s impact strength decreases, while the tensile strength, flexural strength. Vicat softening temperature and melt flow rate all increase.Wood-plastic composites are widely used in construction, furniture, packaging and gardens. In their production process, the higher the proportion of waste PP is, the greater the amount of compatilizer and flexibilizer will be and so will the cost of raw materials. Toughened ABS scrap and ABS/PMMA plastic alloys can be widely used in home appliances, pipes and decorative plates and other products. Adding ABS powder to toughening ABS and adding waste PMMA to making ABS/PMMA plastic alloys will both increase the cost of raw materials. Toughened ABS scrap will increase0.56RMB/kg in raw material price when the ABS powder dosage increases5%. And ABS/PMMA plastic alloys will increase0.04RMB/kg in raw material prices when the waste PMMA dosage increases10%.