Method for manufacturing multilayer board

Details Method for manufacturing multilayer board Method for manufacturing multilayer board

1989-01-13

1990-10-09

Chin, Peter

Paper making and fiber liberation

Processes and products

Multi-layer waterlaid webs or sheets

162132, 162133, D21F 1104

Patent

active

049618245

ABSTRACT:
A method for manufacturing multilayer board in which the pulp suspension forming a surface layer (12) is fed onto the horizontal section of a first, inner wire (1). The pulp suspension forming an intermediate layer (11) is supplied onto said web layer, which is already formed, in or in front of a tapering gap (6) constituted by the first wire and a second, outer wire (4). Both of the wires and the web layers (11, 12) between them are guided over a curved surface (3). After this the first wire and both of the web layers are guided against a third wire (8) onto the horizontal section of which the pulp suspension forming the other surface layer (13) is supplied. The consistency of the pulp suspension forming the intermediate layer (11) is remarkably higher than that of the pulp suspensions forming the surface layers (12, 13).

REFERENCES:
patent: 2881672 (1959-04-01), Thomas
patent: 3839143 (1974-10-01), Suckow
patent: 3985612 (1976-10-01), Watanabe
patent: 4376012 (1983-03-01), Bergstrom
patent: 4425187 (1984-01-01), Armstrong et al.

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