Coextrusion involves extruding two or more materials from separate extruders through a common die in a manner in which multiple extrudate layers are combined into a contiguous multilayer laminate film. Each extruder can supply one or more layers the same material by arranging the orifices.
Coextrusion incorporates the functional characteristics of several materials, such as stiffness, heat-sealability, gas permeability, optics, or environmental resistance into one laminate structure.
Coextrusion research and development at the AAPPI utilizes a coextrusion mini-line that may be configured for up to five-layer (A/B/C/B/A) blown or cast film production.
