Wide slit nozzle for the production of a continuous thermoplastic melt film, extruded by a nozzle outlet of a wide slit nozzle

摘要

In the production of single-layer and/or multilayer films, slit dies are used for which the rheological design takes into account the temperature profile of the melt(s) across the die outlet and the die deflection caused by the flowing of the melt(s) within the die. For this purpose the geometrical moment of inertia I is calculated as a function of the cross-sectional surface area A of the die body. IMAGE