Polymer and Materials Science
Wiley InterScience Backfile Collection 1832-2000
Chemistry and Pharmacology
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
In single screw melt extruders there is a continuous flow of polymer melt over the flight clearance. The melt flowing over the clearance experiences high shear rate and may also experience very high temperature. This, in turn, may affect polymer structure and properties. The melt that flows over the flight is mixed with the bulk of the melt flowing in the channel. In the extrudate there are fluid elements that have not passed over the flights and there are fluid elements that passed over the flight once, twice, or many times. In this paper, a theoretical model is proposed for calculating the number of pass distribution function of a melt stream emerging from a melt extruder.
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