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FLEXO Magazine : April 2014
TECHNOLOGIES & TECHNIQUES The Perfect Laminate? Extrusion Coating’s Capabilities, Use Cases, Benefits By Frank Passarelli Extrusion coating technology is very close to the “perfect” lamination. As far as certain features are concerned, by using extrusion coating it is possible to laminate plastic films to almost any substrate without the use of adhesives. This characteristic enables production of multi layer laminates with high barrier properties without the limita- tions associated with the use of solvents, like: • Drying • Evaporation • Disposal This advantage is gained by exploiting the plasticity properties of the resins themselves. The versatile nature of the extrusion coating process enables materials laminated in this way to be used for a wide variety of food and nonfood applications. These include: • Milk/juice cartons • Aseptic drink containers • Flexible packaging Snack foods EXEMPLARY EXTRUSION • Coating lines operating at speeds of up to 2,300 fpm • Coat and laminate materials in web widths from 51- in. up to 106-in. • Limitations posed by solvents are non existent • Constant temperature across web 22 FLEXO APRIL 2014 www.flexography.org