Temperature evaluated by ultrasonic technique during mixing process

Abstract

Temperature in internal mixer has been evaluated by ultrasonic measurements during the mixing process of low density polyethylene (LDPE) pellets with CaCO 3 powder. The melting process of LDPE from solid pellets to polymer melt and the mixing progress of melted LDPE with CaCO 3 powder were diagnosed by temperature and ultrasonic signatures on-line. The improved factor analysis was utilized to evaluate the relationship between temperature and ultrasonic parameters and rebuilt the temperature. The estimated temperature value had an agreement with the raw data within 4%. The presented ultrasonic technique and evaluating methodology might be an optional approach to diagnose the mixing process of polymer with powder in the internal mixer and evaluate the temperature on-line.

Torque value evaluated by ultrasonic technique during polymer melting process

“…The promoted factor analysis technique (Cheng and Lu, 2011) was utilized to identify the correlation between torque measurement and ultrasonic signatures. This analysis separates the effects of the studied factors from the errors.…”