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Process Set-Up and Design of Degassing Zones

3 Kneading block zone for re-heating of the melt after flash [Pg.190]

Vacuum zone 1 Vacuum zone 2 vacuum zone 3 approx. 20 % LM approx. 5 % LM Residual devolatization approx. 200 mbar approx. 50 mbar approx. 10 mbar [Pg.190]

Compared to conventional processing tasks, the extruder drive motor is usually quite small for degassing processes, because the intake of polymer solutions or polymer melts does not require a high torque consumption. The use of a back vent depends on the amount of [Pg.190]

Polymer melts that do not Stick to the screw (polyolefins) [Pg.192]

Polymer melts which tend to stick to screws (PA, PET) [Pg.192]


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And SET processes

Degassing

Process zone

Processing zone

SET process

Zone design

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