Grid steam treatment

Abstract From the Canadian patent

There is disclosed a process for the production of threedimensionally deformed mouldings from planar blanks of bindercontaining 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 …