Grid steam treatment

Details Grid steam treatment Grid steam treatment

B - Operations, Transporting

27

N

18/952

B27N 5/00 (2006.01) B27N 3/08 (2006.01)

Patent

CA 1297250

ABSTRACT There is disclosed a process for the production of three- dimensionally deformed mouldings from planar blanks of binder- containing fibrous mats, which preferably contain cellulose and/or lignocellulose fibres. The initially pourable, loose fibrous material is brought into mat form and compressed to a tangled fibre fabric, from which the desired blanks are punched or separated in some other way. These blanks are subsequently softened by steam treatment or adequately plasticized for deformation purposes by some other heat treatment. In this form, they finally undergo the process which compresses or deforms the fibrous material. During or after steam treatment or other thermal treatment, a linear or lattice-like retaining grid or pressing grid is applied to at least one side of the mat blank in such a way that, in accordance with the grid structure and at least partly stopping the thickness increase resulting from steam treatment, a corresponding compression pattern is impressed in the vaporized-on mat blank.

589746

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