Verfahren zur Herstellung einer Mehrlagigen Faserbahn und Formierabschnitt zur Herstellung einer Mehrlagigen Faserbahn

Details

Veröffentlichungs-Nr.

EP4796704

Anmeldetag

25. Februar 2025

Veröffentlichung

26. August 2026

Rechtsraum

EP

IPC

D21F9/00, D21F11/04

Abstract

The invention relates to a method for forming a multi-ply fiber web (W) in a forming section (100), in which at least part of the forming is done in a twin-wire forming part formed between a first wire (10) for a first layer of the multi-ply fiber web and a second wire (20) for a second layer of the multi-ply fiber web, in which the layers for the multi-ply fiber web are joined in the twin-wire part at a joining location, in which twin-wire forming part water is removed from the joined layers of the multi-ply fiber web by a variable-curvature roll (50). In the method the layers of the multi-ply fiber web are joined at a curved surface stabilization element (32) by a nip between the curved surface stabilization element (32) and the first and second wire (10; 20) at the joining location. The invention also relates to a forming section (100) for forming a multi-ply fiber web (W) comprising at least one twin-wire forming part formed between a first wire (10) for a first layer of the multi-ply fiber web and a second wire (20) for a second layer of the multi-ply fiber web, which twin-wire part comprises a joining location, in which the layers for the multi-ply fiber web are joined, which twin-wire forming part comprises a variable-curvature roll (50). In beginning of the twin-wire part of the forming unit (110) a curved surface stabilization element (32) is located, that at the joining location between the curved surface stabilization element (32) and the first and second wire (10; 20) a nip is formed to join the layers of the multi-ply fiber web are joined.

Anmelder

Firma

Valmet Technologies Oy

Land

🇫🇮 Finnland

Fachgebiete