Restrictor Bar

A flat film extrusion die used either in conjunction with a feedblock to produce multilayer film or as a stand alone component producing mono-layer film (one material only - no layers), performs the same process function. It accepts an incoming steam of material and reshapes it into a flat, thin film for discharge and subsequent cooling.

The typical flat film die design begins with two large steel plates having complex cavities machined on one surface of each plate. The two plates, or die bodies, are bolted together with the cavities of each plate enclosed between the two bodies. The primary components of the machined cavities include (1) the entry channel, (2) the manifold, (3) the distribution mechanism and (4) the die land.

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