Dave Denzel has joined iD Additives Inc., La Grange, Ill., in the role of technical manager. Denzel comes to the maker of purging compounds, foaming agents, UV stabilizers and rust-removal products with a background in the plastics industry, including technical sales of purging compounds for extrusion, injection molding and blow molding. His previous employers include Neutrex Inc., Visiocorp USA and Rexair Inc.