Twin screw extruders are the preferred manufacturing methodology to mix polymers, natural fibers and bioplastics. The final product can be pellets, film, sheet, pipe/profile, filaments and/or fibers. Compounding of heat- and shear-sensitive bioplastics requires careful staging of unit operations and efficient system design. Relevant theory, tips and test results will be presented.

Presented by:

Leistritz Extrusion Technology logo
  • Continuous mixing of heat- and shear-sensitive bioplastic formulations via twin screw extruders
  • Matching twin screw and barrel geometries to unit operations
  • Comparison of co-rotating and counter-rotating twin screw extruder designs
  • Devolatilization theory, techniques and practices
  • Upstream material handling and downstream system considerations
Charlie is president of Leistritz Extrusion USA, a company that provides manufacturing equipment and engineering services to the plastics, medical and pharmaceutical industries in the U.S. and around the world.

He has delivered hundreds of technical presentations, authored numerous papers and chapters relating to a wide range of extrusion topics, is the co-editor of the textbook entitled "Pharmaceutical Extrusion Technology", and has been awarded two extrusion-related patents.

Charlie serves on the board of directors for the extrusion division of the Society of Plastics Engineers (SPE) and the Polymer Processing Institute. He also serves on the technical advisory board for Teel Plastics and the bioplastics division committee for the Plastics Industry Association.

Charlie earned his undergraduate degree from Gettysburg College and an MBA from Rutgers University.
Assistant Lab Manager
Brian is the assistant lab manager at Leistritz. Some of his responsibilities include the operation of extruders, process support and training. He is a graduate of the New Jersey Institute of Technology with a bachelor's degree in chemical engineering and a master's degree in pharmaceutical engineering. He has been published by the American Association of Pharmaceutical Scientists and in the second edition of the textbook titled "Pharmaceutical Extrusion Technology".
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