Glossary of Plastic Terms

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Radical Radio Frequency (RF) Preheating Radio Frequency Welding Ram Ram Travel Random Copolymer Rayon Ream Recessed Panel Reciprocating Screw Rectangular Recycled Plastic Reformulated Plastic Regenerated Cellulose (Cellophane) Regrind Reheat Blow Molding Reinforced Plastics Reinforcement Relative Humidity Relative Viscosity Release Agent Relief Angle Reprocessed Plastic Residual Monomer Resiliency Resin Resinoid Resin Pocket

Resistivity Restricted Gate Restrictor Ring Retainer Plate Retaining Pin Reverse-Roll Coating Reworked Plastic Rheology Rheometer Rib Ribbon Blenders Rigid Plastics Rigid PVC Rigid Resin Ring Gate Rocker Rockwell Hardness Roll Mill Roller Coating Rosin Rotating Spreader Rotational Casting Rotational Molding Round Square Roving Rubber Runner