Verfahren und Vorrichtung zum Aufbringen einer Substanzschicht auf eine Bewegte Faserbahn durch Schaumauftrag

Details

Veröffentlichungs-Nr.

EP3910103

Aktenzeichen

EP21170038

Anmeldetag

23. April 2021

Veröffentlichung

10. September 2025

Erteilung

10. September 2025

Rechtsraum

EP

IPC

D04H1/68D21H21/56D21H23/46D21H23/52

Abstract

The invention relates to a method for applying at least one substance layer in form of foam onto a moving fiber web (W) directly or indirectly by foam application through at least one opening of at least one nozzle opening (16) of a nozzle tip (15) of an application device (C10; C20; C30) as a foam flow (C). In the method an angle (A), in which the foam flow (C) through the nozzle opening (16) meets a target surface, is less than 90 degrees, advantageously 30-85 degrees, which target surface is in direct application the surface of the fiber web and in indirect application the surface of a roll, or of a belt or of a wire or of a felt or of like. The invention also relates to a system for applying a substance layer onto a moving fiber web (W) directly or indirectly by foam application comprising an application device (C10; C20; C30) comprising at least one nozzle tip (15) with at least one nozzle opening (16) for a foam flow (C). The system comprises means (17; 18; 19,20) configured to set/adjust an angle (A), in which the foam flow (C) through the nozzle opening (16) meets a target surface to less than 90 degrees, advantageously 30-85 degrees, which target surface is in direct application the surface of the fiber web and in indirect application the surface of a roll or of a belt or of a wire or of a felt or of like.

Anmelder

Firma

Valmet Technologies Oy

Land

🇫🇮 Finnland

Fachgebiete