volume 34, issue 13, P1090-1100 1994
DOI: 10.1002/pen.760341308
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Abstract: Abstract A rational computer‐aided design procedure is presented for determining the optimum flow channel geometry of a flat film die, which yields a minimum pressure drop and produces a uniform transverse flow rate distribution. The three‐dimensional die surface is generated by analytic expressions that represent a dumbbell‐like contour. The die surface may be specified by several geometric parameters. The length of the transition zone turns out to be the controlling parameter. Because of the complicated geo…

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