| abstract |
The board product manufacturing method comprises at least two layers and a multi-board product. According to the method, the board webs (4, 5, 6) forming the layers are bonded together by adhesion. According to the invention, at least one of the webs is mechanically processed by compression, so that at the web surface a permanent deformation protruding from the web surface is formed and the layer is more than 45% to the layer to be bonded. Adhere together using a starch-based adhesive applied at a solids content. An adhesive having a high solids content will quickly dry and bond to the surfaces to be bonded without additional heating. Since the adhesive contains a small amount of water or no water at all, no afterbending or flattening of the intermediate layer occurs in the bond. |