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This process involves two or more polymers being extruded together to provide a multi-layer structure, with each plastic retaining its original properties. Monitoring ensures the correct layer structure is achieved.

Two or more melt streams are extruded from a single die simultaneously, forming a laminar structure. This allows the production of a film or sheet with a blend of polymers while retaining the individual properties of each.

Co-extrusion differs from lamination in that – instead of being produced first and then adhered together – the plastic layers are formed without any intermediate steps. This process allows for much thinner layers, as they do not need to be self-supporting.

Since the extruded plastic is made up of several layers, each with different properties, it is possible that surface defects may be created during production. An accurate, automated monitoring system will be able to detect any problems and help maintain consistent product quality and performance.
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