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 describes a device and method for making corrugated products. The device can be used with any substrate and includes, at least, first and second drive rollers for driving a middle substrate and a single wall corrugated product. In other embodiments the invention includes upper drive rollers, lower drive rollers and middle drive rollers for driving an upper substrate, a lower substrate and a middle substrate. The middle substrate is driven between the upper and lower substrates at a higher velocity to form flutes that are anchored between the upper an lower substrates thereby forming a corrugated product. The invention also provides for customized corrugated products having multiple fluted substrates in various desirable arrangements. Examples of such products include mattress, partition panels, other furniture and construction products.

A system for manufacturing a three-dimensionally deformed plate made of a wood fiber material comprises a preheating station, a wetting device, and a molding station including two rollers spaced apart for receipt of a preheated and wetted flat wood fiber material plate therebetween. The rollers respectively include an external surface including a wave-shaped profiling in the peripheral direction, wherein the respective profiling has half-waves which follow one another in the peripheral direction, and which have a different extension in the peripheral direction

A photovoltaic construction wall is provided, having an inner surface adapted to face an inner enclosed space, and an outer surface adapted to gather energy from the sun when installed. The wall is used in buildings and also in buildings in building complexes. The construction wall includes a multi-layered composite wall comprising plates made from corrugated cardboard, an insulating space and a photovoltaic panel. The multi-layered composite wall has a first inwardly disposed dense, organically based panel to which is affixed a first plate made from corrugated cardboard, the flutes of the corrugated cardboard construction being disposed transversely to the panel surface; a second dense, organically based panel affixed to the aforementioned plate, to the second dense, organically based panel is affixed a second plate made from a denser corrugated cardboard, the flutes of which are disposed transversely to the panel surface, providing inertia to temperature variations; a third dense, organically based panel connected to said second plate, which third dense, organically based panel has a light absorbing layer on an outwardly disposed surface thereof; and, connected to the light absorbing layer or the third dense, organically based panel, a third plate made from corrugated cardboard the flutes of which are disposed transversly to the panel surface. The third plate has an air gap outwardly disposed thereof in which air is free to circulate by means of vents disposed at the extreme ends of the photovoltaic panel. The photovoltaic panel is made up of photovoltaic cells transparent to infrared radiation from the sun. It is structurally connected to the construction wall at a distance defining said air gap and disposed outwardly so as to gather the sun's rays when installed.

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.