New On-line Measurement and Control of Multilayer Blown Films, 2008 PLACE Conference

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This paper focuses on a new technique of precisely mapping the double-layer lay-flat measurement to the rotating bubble to provide discrimination of various Polymer layers using the Full Spectrum Infra Red sensor technology. This results in rapid Auto Profile Control of the annular die or alternately the air ring, to ensure blown film gauge uniformity. Film quality improvements along with significant savings due to down gauging and reduced scrap while improving productivity have been achieved.