Fibreboard

Abstract

The disclosure proposes a fibreboard made of lignocellulose-containing fibres, in particular wood fibres and a binding agent for providing a fibreboard which enables to combine a high stability, on the one hand, and a comparatively small weight, on the other hand, and which can nevertheless be manufactured with a minor financial effort.

Claims

1. A fibreboard comprising: lignocellulose-containing fibres and a binding agent, the fibreboard being a high density fibreboard and including a three-dimensional deformation that extends in at least one direction and periodically recurs, wherein the binding agent is activatable by vapour treatment, wherein a ratio of a thickness of the fibreboard having a linear unit with respect to a volume of the fibreboard having the linear unit cubed is at least 1:3 linear units squared, wherein the three-dimensional deformation includes a sinusoidal deformation progress.

2. The fibreboard according to claim 1, wherein the deformation extends obliquely to a side edge of the fibreboard.

3. The fibreboard according to claim 1, wherein the fibreboard is connected to another fibreboard including a periodically recurring deformation such that the fibreboard and the another fibreboard lay on top of each other.

4. The fibreboard according to claim 3, wherein the periodically recurring deformations of the fibreboards which are placed on top of each other are arranged at angles with respect to each other such that the deformations in the respective fibreboards do not extend parallel to one another.

5. The fibreboard according to claim 1, wherein said fibreboard is connected to a flat board on at least one of its surfaces.

6. The fibreboard according to claim 1, wherein the high density fibreboard includes a medium raw density greater than 800 kg/m.sup.3.

7. The fibreboard according to claim 1, wherein the lignocellulose-containing fibres are 15 to 20 mm in length.

8. The fibreboard of claim 1, wherein the deformation includes a repeating wave cross-sectional shape.

9. The fibreboard of claim 8, wherein peaks of the deformation including the repeating wave cross-sectional shape are flat.

Description

DRAWINGS

(1) The disclosure provides an innovative fibreboard as well as an innovative manufacturing method which enable to manufacture fibreboards, which comprise a particular mechanical stability with simultaneously a small weight with respect to the spatial volume, with a manageable economic effort by means of an innovative manufacturing unit. Other advantages and features of the disclosure will become apparent from the following description by means of the figures. Herein:

(2) FIG. 1 shows a schematic side view of a fibreboard according to the disclosure;

(3) FIG. 2 shows a perspective partial view of a fibreboard according to the disclosure and

(4) FIG. 3 shows a schematic side view of a sandwich board.

DESCRIPTION

(5) FIG. 1 shows a fibreboard 1 which comprises a progressing rectangular wave structure in the shown exemplary embodiment. As explanation the dimensioning of the board thickness 2, on the one hand, and the dimensioning of the board height 3, on the other hand, are shown. The board height is together with the circumference of the board the measure for calculating the spatial volume of the board. It becomes clear that a very great spatial volume can be obtained by means of an inherently very stable thin board 1 which only comprises the thickness 2.

(6) FIG. 2 schematically shows a board 4 having an essentially sinusoidal deformation progress.

(7) It is obvious that these boards, either in a sandwich construction or as single boards, comprise a high mechanical strength with simultaneously a small bulk density.

(8) As the representation of a sandwich board in FIG. 3 shows, both surfaces of a corrugated and deformed board 5 according to the disclosure will be laminated with two flat boards 6 and 7. Contact lines result along the wave groups. The areas designated with 8 are connection areas, in which glue is applied. The peaks of the boards 5 can be flattened before, for example by grinding them flat. The glue can be applied onto the connection areas 8 by means of a roller, by linear spraying, by means of a mask or the like. The sandwich compound is formed by subsequent pressing. Corresponding connection areas are similarly formed in the area of the lower flat board.

(9) The described exemplary embodiments only serve for explanation and are not limiting.