1. Coextrusion process
Coextrusion is a process used to manufacture a sheet or plate by superimposing and/or juxtaposing layers to optimize the structure's performance: the resulting sheet is called a multilayer sheet.
This process involves simultaneously extruding ("coextruding") the polymers making up the different layers, then joining them in a single flow for common shaping.
The various flows are brought together:
or before the die (figure 1a);
or inside the die (figure 1b);
or a combination of the 2 (figure 1c).
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Coextrusion process
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