Coextrusion of foils and sheets

In less than forty years, coextrusion has become a major technological component of extrusion.

In every field, from tube to sheet, from profile to plate, from bottle to blown film, it is at the heart of manufacturing processes. Among other things, it can be used to incorporate :

• a protective layer on the outside of the profile;

• a flexible joint on a rigid profile;

• a color and/or protective layer on the surface of a sheet or plate;

• an inner barrier layer in a sheet, tube or bottle;

• scratches on the outside of tubes and straws (used for drinking);

• an internal recycling layer, etc.

In particular, coextrusion is ubiquitous in sheet and plate production, to the extent that virtually every line sold today incorporates several extruders.