Research on Preparing Recycling Boards by Using Non-Metallic Materials of Obsolete Printed Circuit Boards

Abstract

The printed circuit boards (PCBs) are the basis of all electrical and electronic equipment (EEE) and thus are one of the most important branches of WEEE stream. Present researches mainly concentrate on the processes of reusing noble metals and copper, and a great deal of nonmetals in PCBs are disposed by combustion or filling, which may cause secondary pollution and resource-wasting. So in this paper, we study how nonmetals are used to produce recycling boards through adding different adhesives, and obtain the best formulation and working conditions. The best formulation is that the binder is Polypropylene (less than 20%), additive are methenamine (little) and stearic acid (little). Effects of working conditions on the molding results are investigated. The results show that the optimum conditions for hydraulic pressure machine are the temperatures of 160 °C, warming and pressing time of 10 minutes and the press of 30MPa.

Research on Evaluation Index System of Non-Metallic Materials Recycling Technologies from Copper Clad Laminate

“…Min Xu, Bohua Duan, Jie Guo, Zongke Zhang etc. analyzed the non-metallic materials recycling process and its product performance of WPCB S [1][2][3][4] . Throughout the existing recycling technologies, physical recycling method is the mainstream technology, the application of thermal decomposition recycling method is relatively less and solvent recycling process is still in pilot trial stage in the laboratory.…”