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Various temperature profiles during extrusion foaming in the second cooling extruder of the tandem-screw extruder. Reprinted from Keshtkar et al. [151]. Copyright (2020), with permission from Elsevier.
| Zone 1 | Zone 2 | Zone 3 | Heat Exchanger | Die | |
|---|---|---|---|---|---|
| Profile 1 | 180 | 140 | 130 | 130 | 120 |
| Profile 2 | 180 | 135 | 125 | 125 | 120 |
| Profile 3 | 180 | 130 | 120 | 120 | 120 |
