2. Mechanisms and modeling
2.1 Solid conveying zone
2.1.1 Solid conveying mechanism
In the feed zone, the rheological behavior of the polymer, whether granulated or powdered, is similar to that of "sand", with a certain cohesion and angle of internal friction. In fact, experience shows that it is rapidly compacted by pressure and temperature, and then behaves like an almost indeformable, helical-shaped solid, sliding in the space between the screw and the sleeve. In fact, it is the forces of friction between the polymer, the sleeve and the...
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Mechanisms and modeling
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