A New In‐line Optical System for Monitoring Residence Time during Polymer Processing Along a Twin‐Screw Extruder

Residence time (RT) is an important factor in the processing of molten materials, since it strongly influences the quality of the final product. In this study, a simple and low cost optical system is developed to determine residence time of polypropylene (PP) during its processing in a TeckTrill co‐...

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Bibliographic Details
Published in:Macromolecular symposia. 2020-12, Vol.394 (1), p.n/a
Main Authors: Mandarino, Bianca da R., da Silva, Ana Lúcia N., Michel, Ricardo C.
Format: Article
Language:English
Subjects:
Color
extrusion
Feed rate
polymer processing
Polymers
Polypropylene
residence time
Residence time distribution
Saturation (color)
Temperature profiles
Twin screw extruders
Webcams
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Summary:Residence time (RT) is an important factor in the processing of molten materials, since it strongly influences the quality of the final product. In this study, a simple and low cost optical system is developed to determine residence time of polypropylene (PP) during its processing in a TeckTrill co‐rotational twin screw extruder. The temperature profile is 90/160/180/190/190/195/195/200/200/210 °C with a screw speed of 300 rpm and a feed rate of 2.3 kg h‐1, using a commercial tracer and different screw profiles. Through the capture of images of the processed material, obtained by a webcam at the matrix output, the developed program is able to calculate the average RGB (red‐green‐blue) color of the analysis area and convert it to the HSV (hue‐saturation‐value), generating a curve of color saturation as a function of time. The results suggest that the developed optical system is a potential suitable tool for in‐line RT measurements.
ISSN:1022-1360
1521-3900
DOI:10.1002/masy.202000065