Recent developments in film extrusion technology

Karen Xiao, Extrusion Development Manager, Brampton Engineering Inc

07 January 2010 at 10:30

Location: JHE 326H

One of the most common forms of polymer processing is film extrusion. Polymeric films are used in many applications such as food, medical, aerospace, building and construction, and automotive. There are two conventional methods used in industry to make films: blown film and cast film. The differences between the two technologies will be outlined, along with their respective advantages and disadvantages. To combine the advantages of conventional film extrusion methods, a new technology commercialized by Brampton Engineering will be discussed; instead of using air to cool the bubble as is used in a conventional blown film process, water is used. Due to the faster cooling medium, the overall film structures become more amorphous which result in enhanced film properties. In recent years, there has also been a green movement in industry which has prompted the development of more energy efficient equipment and more sustainable packaging. This has resulted in an accelerated increase in the use of multilayer films. The main advantage of coextrusion is the ability to combine materials of different properties into one single structure in the most economic way possible. With the recent developments in materials and machinery processing, new boundaries have been explored in various technology sectors.

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