A building panel with a high degree of isotropy with regard to the load bearing capacity and flexural strength. The building panel includes a first section and a second section, each section including at least one layer, each of the at least one layer having fibers, whereby the fibers are distributed substantially homogeneously throughout each layer, substantially parallel to the main surfaces of the panel and oriented predominantly in the same direction and the sections are firmly joined in transverse direction, and the first section is thinner than the second section.

A connection arrangement for panels includes a first panel having a first main plane, a second panel having a second main plane, the first main plane is essentially perpendicular to the second main plane in a connected state. The second panel includes a groove on a first face adapted to receive a first protruding edge. The groove has a longitudinal recess on a side for receiving a flexible locking element, the protruding edge has a longitudinal insertion recess on one side of the protruding edge for holding the flexible locking element. The groove includes a first groove section and an adjacent groove section connected by an intermediate groove section. The first edge includes a first protruding section and an adjacent protruding section, wherein the first groove section is configured to cooperate with the first protruding section, and the adjacent groove section is configured to cooperate with the adjacent protruding section.

A connection arrangement for panels includes a first panel having a first main plane, a second panel having a second main plane, the first main plane is essentially perpendicular to the second main plane in a connected state. The second panel includes a groove on a first face adapted to receive a first protruding edge. The groove has a longitudinal recess on a side for receiving a flexible locking element, the protruding edge has a longitudinal insertion recess on one side of the protruding edge for holding the flexible locking element. The groove includes a first groove section and an adjacent groove section connected by an intermediate groove section. The first edge includes a first protruding section and an adjacent protruding section, wherein the first groove section is configured to cooperate with the first protruding section, and the adjacent groove section is configured to cooperate with the adjacent protruding section.

Hard panels formed from a wood-based material and having a decorative layer for floor coverings are provided, at least on two opposite edges, with coupling devices made in one piece with the panels wherein similar panels may be coupled together to form a floor covering, wherein these coupling devices provide for an interlocking in a direction perpendicular to the plane of coupled panels, as well as in a direction perpendicular to the edges concerned and parallel to the plane of coupled panels. These coupling devices are constituted of a tongue and a groove. The top side of the tongue has a protrusion that cooperates with a meshing recess located in the lower side of the upper lip of the groove of the coupling devices, and a portion extending generally parallel with the plane of the panel to form a contact surface cooperating with the lower side of the upper lip of the groove.

Hard panels formed from a wood-based material and having a decorative layer for floor coverings are provided, at least on two opposite edges, with coupling devices made in one piece with the panels wherein similar panels may be coupled together to form a floor covering, wherein these coupling devices provide for an interlocking in a direction perpendicular to the plane of coupled panels, as well as in a direction perpendicular to the edges concerned and parallel to the plane of coupled panels. These coupling devices are constituted of a tongue and a groove. The top side of the tongue has a protrusion that cooperates with a meshing recess located in the lower side of the upper lip of the groove of the coupling devices, and a portion extending generally parallel with the plane of the panel to form a contact surface cooperating with the lower side of the upper lip of the groove.

A core layer suitable for a multilayer composite including at least one surface layer and one core layer, the surface layer arranged to at least partially cover the core layer and be fixedly connected thereto, wherein the core layer has elements composed of wood, which elements have plate-like regions arranged in zig-zag-shaped fashion, wherein a plate-like zig region of an element with an adjoining plate-like zag region of the element form a common edge between them, in such a way that the wood element of zig-zag-shaped form is formed, wherein elements of zig-zag-shaped form are arranged in the core layer such that two such edges of two different elements cross one another at a non-zero angle, and wherein the two elements are fixedly connected to one another at the crossing point. In one embodiment, a wood element of zig-zag-shaped form may be adhesively bonded to a planar wood element.

The invention relates to a web (1) with a web base (3) and a tube segment (4) made of a wood-based material or bamboo, wherein the tube segment (4) comprises a wall (5) which is delimited in the circumferential direction of two cut ends (8, 9), and wherein the tube segment (4) is mechanically connected to the web base (3) by means of at least one of the cut ends (8, 9).

The invention further relates to a sandwich plate (2) with a plate layer (11) and a core layer (13), wherein the core layer (13) comprises at least one web (1) according to the invention which is mechanically connected to the adjacent connecting face (14) of the plate layer (11) by means of a cut face (6, 7) of a tube segment (4), wherein the cut faces (6, 7) delimit the wall (5) of the tube segment (4) in longitudinal extension direction.

The invention further relates to a sandwich block (26) and a methods for producing a sandwich plate, a web (1) and a sandwich block (26).

The invention relates to a web (1) with a web base (3) and a tube segment (4) made of a wood-based material or bamboo, wherein the tube segment (4) comprises a wall (5) which is delimited in the circumferential direction of two cut ends (8, 9), and wherein the tube segment (4) is mechanically connected to the web base (3) by means of at least one of the cut ends (8, 9).

The invention further relates to a sandwich plate (2) with a plate layer (11) and a core layer (13), wherein the core layer (13) comprises at least one web (1) according to the invention which is mechanically connected to the adjacent connecting face (14) of the plate layer (11) by means of a cut face (6, 7) of a tube segment (4), wherein the cut faces (6, 7) delimit the wall (5) of the tube segment (4) in longitudinal extension direction.

The invention further relates to a sandwich block (26) and a methods for producing a sandwich plate, a web (1) and a sandwich block (26).

The invention relates to a web (1) with a web base (3) and a tube segment (4) made of a wood-based material or bamboo, wherein the tube segment (4) comprises a wall (5) which is delimited in the circumferential direction of two cut ends (8, 9), and wherein the tube segment (4) is mechanically connected to the web base (3) by means of at least one of the cut ends (8, 9). The invention further relates to a sandwich plate (2) with a plate layer (11) and a core layer (13), wherein the core layer (13) comprises at least one web (1) according to the invention which is mechanically connected to the adjacent connecting face (14) of the plate layer (11) by means of a cut face (6, 7) of a tube segment (4), wherein the cut faces (6, 7) delimit the wall (5) of the tube segment (4) in longitudinal extension direction. The invention further relates to a sandwich block (26) and a methods for producing a sandwich plate, a web (1) and a sandwich block (26).

The invention relates to a web (1) with a web base (3) and a tube segment (4) made of a wood-based material or bamboo, wherein the tube segment (4) comprises a wall (5) which is delimited in the circumferential direction of two cut ends (8, 9), and wherein the tube segment (4) is mechanically connected to the web base (3) by means of at least one of the cut ends (8, 9). The invention further relates to a sandwich plate (2) with a plate layer (11) and a core layer (13), wherein the core layer (13) comprises at least one web (1) according to the invention which is mechanically connected to the adjacent connecting face (14) of the plate layer (11) by means of a cut face (6, 7) of a tube segment (4), wherein the cut faces (6, 7) delimit the wall (5) of the tube segment (4) in longitudinal extension direction. The invention further relates to a sandwich block (26) and a methods for producing a sandwich plate, a web (1) and a sandwich block (26).