Chemical structures and uses of some common plastics Around 70% of global production is concentrated hinein six major polymer types, the so-called commodity plastics. Unlike most other plastics these can often be identified by their resin identification code (RIC): The discovery of polyethylene terephthalate is credited to employees of the https://plastic19753.fireblogz.com/60526548/die-grundprinzipien-der-plastic