Panel-shaped composite wooden element
AssigneeFraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e. V.
InventorJohann W. Herlyn
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Abstract
The invention relates to a method for the manufacture of chipboard comprising a centre layer (18) of coarse chips and outer layers (20) of chips whose fibres are oriented in the plane of the board. In order to be able to reduce the density of the finished board while retaining the intrinsic characteristic profile of the board, it is proposed in accordance with the invention that the chips used to compose the centre layer (18) will comprise end-grain cut, flake-like chips (22) whose fibres are oriented in the thickness direction (24) of the chips, the chip fibres in the centre layer being oriented substantially transversely to the plane of the chipboard. The invention also relates to chipboard manufactured in accordance with the method.
Claims15
A panel-shaped composite wooden element (1) for use as a supporting panel element for construction, characterized by a load-transferring and thermally insulating core (2) and at least one separate cover layer (3) which is integrally connected to the core surface, the core (2) and the cover layer (3) each being formed from a wooden particle composite, the apparent density of the core (2) for the load-transferring function being at maximum approximately 500 kg/m3 and at least one of the cover layers (3) being load-transferring and having an apparent density of at least approximately 500 kg/m3.
A method for manufacturing chipboard comprising a centre layer (18) of coarse chips and surroundig outer layers (20) of chips whose fibres are oriented in the plane of the board, characterised by using as chips for the centre layer (18) end-grain cut, flake-like chips (22) whose fibres are oriented in the thickness direction (24) of the chips, the chip fibres in the centre layer (18) being oriented substantially transversely to the plane of the board.
Chipboard comprising a centre layer (18) of coarse chips and outer layers (20) of chips whose fibres are oriented in the plane of the board, characterised in that the chips (22) in the centre layer (18) consist of end-grain cut, flake-like chips whose fibres are oriented in the thickness direction (24) of the chips, the chip fibres in the centre layer (18) being oriented substantially transversely to the plane of the board.
The, panel-shaped composite wooden element (1) as claimed in one of the preceding claims, characterized in that at least one of the cover layers (3) has a higher resistance to water vapor diffusion than the opposite cover layer.
The panel-shaped composite wooden element (1) as claimed in one of the preceding claims, characterized in that at least one of the cover layers (3) has low flammability or is noncombustible.
The panel-shaped composite wooden element (1) as claimed in one of the preceding claims, characterized in that the borders on the outer edges of the core (2) have at least one cover layer (3).
The panel-shaped composite wooden element (1) as claimed in one of the preceding claims, characterized in that at least one of the cover layers (3) is thermally insulating and has a thermal conductivity of between 0.1 W/(m2K) and 0.2 W/(m2K).
The panel-shaped composite wooden element (1) as claimed in one of the preceding claims, characterized in that the core (2) and/or the cover layers (3) is or are each formed from a composite comprising wood-based materials with different particle structures.
The panel-shaped composite wooden element (1) as claimed in one of the preceding claims, characterized in that the core (2) is formed from at least one porous fiberboard.
The panel-shaped composite wooden element (1) as claimed in one of the preceding claims, characterized in that at least one of the cover layers (3) is a chipboard.
The panel-shaped composite wooden element (1) as claimed in one or the preceding claims, characterized in that at least one of the cover layers (3) is a medium density fiberboard (MDF).
The panel-shaped composite wooden element (1) as claimed in one of the preceding claims, characterized in that at least one of the cover layers (3) is an oriented strand board (OSB).
The panel-shaped composite wooden element (1) as claimed in one of the preceding claims, characterized in that at least one of the cover layers (3) is a plywood board.
The panel-shaped composite wooden element (1) as claimed in one of the preceding claims, characterized in that cavities are provided for the purpose of receiving house installations and/or for the purpose of saving material.
Dependencies are inferred from the claim text.