Building board with two outer layers and a centre layer with multiple slanted cavities

摘要

A building board with a multi-layer structure, comprising two cover layers, and at least one core layer with multiple cavities is disclosed. The two cover layers (3, 4) are spatially separated from each other and placed parallel to each other and the at least one core layer (5) of wood with multiple cavities (6, 6') is placed between them and joined to them. The two cover layers (3, 4) each comprise a layer, plate or foil material selected from the group consisting of: wood, wooden material, laminated wood, plywood, wood chip material or resinbound wood, metals, textile and fiber materials, cardboard, papers, plastics, fiber-reinforced plastics, mineral-based construction materials, rock, artificial stone as well as composite materials made of two or more of the materials just named. The at least one core layer (5) comprises at least one single-layer slanted-fiber core layer (5), joined to the cover layers (3, 4). The single-layer slanted-fiber core layer (5) is formed from a wood having a unitary fiber structure. The cavities (6, 6') have a slanted angle to the cover layers (3, 4) and the fibers of the slanted-fiber core layer (5) from a positive angle of +25° to +80°, and/or a negative angle of -25° to -80°, to the area of the two cover layers (3, 4). The slanted-fiber core layer (5) has a multiplicity of the positively-slanted and/or negatively-slanted slant cavities (6, 6') that fully run through the slanted fiber core layer (5) parallel to the particular fiber direction.