QUANTIFICATION OF MELTING PROGRESSION DURING TWIN SCREW EXTRUSION USING THE PULSE PERTURBATION TECHNIQUE PART I: METHOD, EXPERIMENT AND NEW INSIGHTS
Mark D. Wetzel, Donald A. Denelsbeck, Susan L. Latimer, E. I. du Pont de Nemours and Co., Inc., Wilmington, Delaware, 19880; and Chi-Kai Shih, Chi-Kai Shih, L.L.C., Wilmington, Delaware
EditAbstract
Steady state and pulse perturbation monitoring of the melting process in a twin-screw extruder has been carried out. While steady state measurements quantify the total mechanical energy input, they provide no information about the melting progression in the working section.
Previously
2, Polypropylene and Polystyrene data were presented for several operating conditions. In this paper, the behaviors of four different resins are examined in more detail. Quantification of melting time and intensity using pulse perturbation power and RTD responses has been attempted. The effects of operating conditions and simple changes in screw design are examined. Multivariate statistical analysis using Principal Components Analysis of independent operating variables, monitored and derived parameters is described.
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