Technical characteristics of multilayer coextruded barrier films

Multi-layer co-extruded barrier films are generally produced using a multi-layer co-extrusion blow moulding process or casting process, a film forming technology, multi-layer co-extrusion has excellent barrier properties, mechanical properties, stretch moulding properties and heat sealing properties, and the process does not need to additionally laminating, and does not involve the printing of inks, adhesives and additives residues and other issues, so it is a relatively green and environmentally friendly, cost advantageous food packaging Technical process.
Multi-layer co-extruded barrier film refers to the use of more than three extruders, the different functions of the resin raw materials, such as: polyethylene, polypropylene, nylon, ethylene - vinyl alcohol copolymer, etc., the distribution of melt extrusion, through their respective runners in the multi-layer co-extruded die at the head of the confluence, and then through the blowing and expanding or casting of sheet moulding and cooling composite together, to make multi-layer co-extruded film. By combining and designing the advantages of different resins, it is possible to produce films with a comprehensive range of properties that meet different packaging needs.