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G. Radomski

Comparison of homogenization of polymers during the extrusion in screw extruder

or screw-disk extruder

Polimery 2005, No 5, 374




Summary

The process of homogenization of low-density polyethylene/coloring marker system in either single-screw extruder or screw-disk extruder has been compared. The effects of marker concentration (0.022-0.087%) and tangential velocity (0.067-0.134 m/s) on the degree of the system homogenization both in the longitudinal section and cross-section were investigated. Homogenization degree was investigated organoleptically (visually). In single-screw extruder the marker is distributed in homogenization zone from the middle of extrudate to the exterior surface while in screw-disk extruder - in interdisk slit from exterior surface of an extrudate to its middle. It was found that in latter case the homogenization of the system was much better than in first one.


Key words: single-screw extruder, screw-disk extruder, coloring marker, homogenization


G. Radomski

Comparison of homogenization of polymers during the extrusion in screw extruder or screw-disk extruder