I. Alig et al., Continuous monitoring of quality parameters - Inline monitoring in the extrusion process using ultrasonics, KUNSTST-P E, 90(5), 2000, pp. 96
An ultrasonic technique for inline measurement of the velocity and absorpti
on of longitudinal waves during the extrusion process was developed. For PS
it was possible to differentiate between the different melt-flaw indices.
For the PE/glass bead composite a significant dependency of both measured v
ariables on the composition was found.