Processing of Metallic Pigments in a Co-Rotating Twin-Screw Extruder Studied by Means of Dielectric Analysis and Terahertz Spectroscopy
Sprache des Titels:
When working with polymeric compounds containing metallic
particles, it is essential to know the influence of the shear rate
of different screw elements in a co-rotating twin-screw extruder
(TSE) on particle size distribution and particle shape.
Particle size and form are significant for various processing
conditions. A large variety of TSE screw and mixing elements
and a wide range of complex mixing geometries are available
for processing polymeric compounds with metallic pigments.
In this case study, we investigated the feasibility of extruding
powder coatings containing metallic pigments as a replacement
for the conventional bonding process. Further, we examined
the influence of different screw elements on particle size
by means of optical microscopy, scanning electron microscopy,
dielectric analysis and terahertz spectroscopy.