54 Guidelines for Plastic Scrap INSTITUTE OF SCRAP RECYCLING INDUSTRIES, INC. Copyright © 2022 Institute of Scrap Recycling Industries, Inc. accepted at any level, 0% allowed. a. PET plastic of any form b. Medical and hazardous waste Contamination material allowed at small percentages a. Plastics other than PVC such as HDPE, LDPE, PP, PS b. Rigid PVC c. Liquids d. Paper & Cardboard e. Ferrous and Non-Ferrous Metals f. Glue, adhesives, sticky tape g. Co-extruded materials h. Reinforcement weaves and fabrics General: Refer to the General Information section foradditional information.