Biography
John Vlachopoulos was educated in Greece and the USA. He is Professor of Chemical Engineering at McMaster University, author of more than 200 publications on polymer processing and rheology, consultant to industry and frequently lecturer in conferences and seminars around the world. He is also President of POLYDYNAMICS, INC. a company involved in computer simulation and software licensing to industry.
Abstract of presentation
IMPROVING SHEET EXTRUSION
John Vlachopoulos and
Takeshi Nakamura (Polydynamics,Inc (Japan),Torideshi,Ibaraki,Japan)
High quality sheet production is a necessary step for successful and problem-free thermoforming. The properties of the extruded resins, screw and die design as well as the operating conditions will affect the final sheet appearance and properties. Whether virgin resin or regrind is used, it is good idea to characterize the polymer rheologically. Beyond the standard Melt Index, high load Melt Index, viscosity as a function of shear rate, as well as the dynamic modulus of elasticity can provide significant insight into material behavior.
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