Development of Plastic Distinction Device Base on Dielectric Constant and Light Reflection of Plastics

Recently, in the automobile industry, developing a plastic material type distinction system has been highly demanded for plastic recycling. We have developed a handy plastic distinction device which distinguishes between polypropylene (PP) and polyurethane (PU) and also distinguishes between 3 types of plastic wheel caps according to the electrostatic capacity and the light reflection pattern of the plastic. The device is operated by a dry battery (9V), so that it can be easily placed in the recovery field of waste automobile plastic parts.