About the Editor:
After gaining his MS in chemical engineering from the University of Notre Dame in 1964, John Wagner worked in the Films Division at Mobile Chemical Company for thirty years. He is now a consultant in plastics products and processes. He has twenty-three patents to his name and is the editor of Journal of Plastic Film and Sheeting and editor or co-editor of four books on extrusion and packaging. John is a Fellow of the Society of Plastics Engineers and serves on the Extrusion Division and Flexible Plastics Packaging Division boards.