Die Lip Sensitivity in Cast Film Dies, 2004 PLACE Conference
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Die designs for production of cast polymer films typically include a flex lip for varying the geometry of the lip
opening. The cast film process requires die lip gaps ranging from 0.4 mm to 0.8mm. Flex lip gap and the
adjustment of said gap becomes increasingly difficult to control as it is reduced. An examination is made of the
issue of die lip sensitivity with different polymers extruded at different lip openings.