Metso Paper Inc.

Juha Maijala

Vilho Nissinen

Juha Lipponen

Kaisa Putkisto

Veli Käsmä

Pentti Rautiainen

Johan Grön

A film is formed on a planar surface by applying a granular layer on the planar surface by using electrostatic forces, and then finishing the granular layer to form the film. A converting line may be rebuilt to have devices employing this method. A multilayer sheet-like product comprising a film layer may be produced.

Method for forming a film, by using electrostatic forces

A powdery layer is formed on a first side of a web (W) which serves as a substrate by applying electrically charged particles on the web while a rotating grounding electrode is located at a second side of the web.

Electrostatic coating device with insulated grounding electrode

A method for preliminary treatment of particles of a powder in a dry surface treatment process before applying the powder particles on a surface of a substrate by utilizing an electric field created by electrodes. The Electrodes are located at opposite sides of the substrate in such a way that at least one first electrode is located at the side of the substrate to be coated, and at least one second electrode is located at the opposites side of the substrate. The particles of the powder are pre-charged before bringing them into the electric field.

Method for electrostatic coating of a paper web

A continuous web having a first surface and a second surface is coated with a coating powder by allowing the web to move between a first and a second electrode, which are in different potentials and are located on the opposite sides of the web, applying the coating powder on the surface of the web by utilizing the difference in the electric potential, and finishing the coated surface of the web. Both surfaces of the web are coated essentially simultaneously by using oppositely charged electrodes.

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Järvenpää, Finland

Juha Maijala