Mitsubishi Polyester Film Gmbh

Hoechst Diafoil Gmbh

Detlef Wacker

Harald Mueller

Uwe Zimmermann

A device for laying a molten film 3 emerging from a slot die 2 onto a rotating take-off chill roll 1 has at least one electrode which is arranged parallel to and at a short distance from the surface of the take-off roll 1 and to which a high voltage in the range from 4 to 12 kV is applied. This electrode is, for example, a metal strip 5 which has a tapering sharp edge 6 that is oriented toward the surface of the take-off roll 1. In addition to this metal strip 5, a second electrode 27 is arranged at a distance from the surface of the take-off roll. This second electrode is a metal strip without a strip edge and has applied to it a voltage of a magnitude that is equal to or different from that of the metal strip 5. As a result, electric fields are formed in addition to the electric field from the one metal strip electrode 5.

Device for laying a film emerging from a slot die onto a rotating

A device for laying a film 3 emerging from a slot die 2 onto a take-off roll 1 has at least one electrode that is arranged parallel to and at a short distance from the surface of the take-off roll 1 and to which electric voltage in the range from 4 to 12 kV is applied. This electrode is, for example, a metal strip 4, which has a tapering strip edge 6 this is directed toward the surface of the take-off roll 1. In addition to this metal strip 4, one or a plurality of electrodes 5, 8 and 16 are arranged at a distance from the surface of the take-off roll. These additional electrodes have applied to them an electric voltage whose magnitude is the same as or different from that applied to the metal strip 4. As a result, additive electric fields to the electric field of the one metal-strip electrode are formed.

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Mainz, Germany

Detlef Wacker