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Article | REF: AM3659 V1

Coextrusion of foils and sheets

Author: Francis PINSOLLE

Publication date: January 10, 2010

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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 1 a);

  • or inside the die (figure 1 b);

  • or a combination of the 2 (figure...

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