TRIBOELECTRIFICATION OF PLASTIC PARTICLES ON A VIBRATING FEEDER LAMINATED WITH A PLASTIC FILM

The charging characteristics of polymer particles were investigated in order to develop an electro-static separator for plastic-plastic mixt ures which are to be recycled. The charging section of the proposed se parator utilizes a vibrating feeder equipped with a charging plate. Pl astic particles are charged by triboelectric charging while moving on the plastic plate. In order to increase the amount of a charge acquire d by the plastic particles as well as to avoid an accumulation of a ch arge at the surface of the plastic plate, a plastic layer with a numbe r of holes was formed by melting fine plastic powder over an aluminum plate. The charging characteristics of several kinds of plastic partic les were investigated and the results show that the plastic-laminated vibrating plate is effective in charging plastic particles.