Extrusion International USA 3-2019

13 Extrusion International 3/2019 RIVERDALE GLOBAL, LLC www.riverdaleglobal.com Liquid Additive increases Physical Properties of Recycled Polymers A new liquid additive reduces the polymer degradation that takes place during melt processing, substantially in- creasing physical property retention in regrind as compared with unmodified material. +Restore™ additive from Riverdale Global has exhibited positive results with recycled commodity resins such as poly- olefins, according to Jared Arbeter, technical sales manager. For example, reground homopolymer polypropylene con- taining +Restore additive exhibited 65% greater Izod impact strength than unmodified regrind (see chart). Improvements have also been achieved with PP copolymer and HDPE. The new additive can be used alone or in a blend with River- dale Global’s liquid colors. Typical usage rates are in the 0.1 to 0.5% range. Processors can use the +Restore additive to enhance the physical properties of virgin materials, though the most dramatic results are exhibited in recycling. “+Restore enables recyclers to obtain physical properties much closer to those of virgin polymer than with unmodified regrind,” said Jared Arbeter. “This innovation expands end- use possibilities for recycled material, opening new applica- tions in molded or extruded products, including fibers.” Graph Showing Retention of Impact Strength in Reprocessed Homopolymer PolypropyleneMade Possible by +Restore™Additive