Method for automated identification of recycled plastic articles with comparison of direct and diffuse transmitted light

摘要

A method for differentiating polymers contained in plastic articles by passing the articles between a light source and an array of detectors which are positioned in a manner such as to allow simultaneous measurements of a directly transmitted light signal and a diffused light signal. The transmitted light signal and diffused light signal are compared and used as a basis for differentiating the polymers.