Abstract: The method is carried out by means of the stacked deposition of a series of layers of fibers and/or particles with a binder material and/or other chemical additives on a conveyor belt until a multilayer mat is produced, in which the layers are physically different from one another. The method comprises: defining the final thickness and density of the board; defining the number of layers forming the board and the type of material to be used for each layer; selecting and preparing the constituent material of each layer to be formed; depositing, in a stacked and staggered manner, the layers previously defined according to weight per m2 of each layer; pre-compacting and, optionally, pre-heating the mat; compacting the mat using pressure and heat. The invention also relates to the board produced using said method for the production of a symmetrical or asymmetrical, stable board.
Abstract: The present invention relates to lignocellulosic materials having a core and two outer layers, comprising in the core A) lignocellulose particles; B) expanded plastics particles having a bulk density in the range from 10 to 150 kg/m3, and C) one or more binders selected from the group consisting of phe-noplast resin, aminoplast resin, and organic isocyanate having at least two isocyanate groups, and and in the outer layers E) lignocellulose fibers and F) one or more binders selected from the group consisting of phenoplast resin, aminoplast resin, and organic isocyanate having at least two isocyanate groups.