EP1267010B1 - Large format OSB-panel with improved properties for the construction industry - Google Patents

Abstract

Wood strand plate has a minimum width of 2.6 m and a minimum length of 7.0 m. Its modulus of flexural elasticity in the principal loading direction is at least 7000 N/mm 2>.

Description

An Oriented Strand Board (OSB) in the sense of this invention consists of at least one layer of flat wood shavings, so-called beaches is constructed. The beaches of this Location are oriented in a preferred direction (here in Production direction = plate longitudinal direction). Even if one speaks here only of a single-layered plate, so becomes in the course of the production of this plate usual way a lower and a mirror-like upper cover layer too united in a homogeneous position.

In multilayer structure forms the situation described above the lower and upper cover layer and in between The middle layer (in 3-layer design), which has no preferred orientation of the stands. These Scattering is also known in technical jargon as "Random". The middle layer is the innermost layer of the Plate called. A 3-layered plate is so from an upper and a lower cover layer and a Middle layer, a 5 or more layered plate from one upper and lower cover layer, from a central position and out Layers between the upper and lower cover layer and the Central location. A preferred embodiment of the invention is a 3-layered plate, 5-layered or still multi-layered disks (an odd number of Layers makes sense). Even numbers of layers are but just as conceivable. An OSB board with the features of The preamble of claim 1 is described in US 5 554 429 A.

The invention is based on the technical problem, a OSB board specified for large-scale use is suitable and, for example, for the construction of Buildings can be used.

The above-mentioned technical problem is according to the invention by an OSB plate with the features of claim 1 solved. Further embodiments are in specified in the dependent claims and in the following described in detail.

The present invention describes a large format Wood-based panel, a component made from it and a method for producing a large format Plate with high mechanical properties like for example, the parameters for bending, tension and pressure, because of that the specific weight of the plate over that to raise usual measure. Furthermore, technological Characteristics of an OSB board described from which one can derive these increased mechanical properties and possible uses of this OSB board.

Biegefestigkeit senkrecht zur Plattenebene:
längs: ≥30,0 N/mm²   quer: ≥15,0 N/mm²

Biegeelastizitätsmodul senkrecht zur Plattenebene:
längs: ≥ 7000 N/mm²   quer: ≥3000 N/mm²

Scherfestigkeit in Plattenebene:
längs: ≥1,2 N/mm²   quer: ≥1,40 N/mm²

Schermodul in Plattenebene:
längs: ≥200 N/mm²   quer: ≥190 N/mm²

Druckfestigkeit "feucht" in Plattenebene:
längs: ≥24,0 N/mm²   quer: ≥16,5 N/mm²

Druckelastizitätsmodul "feucht" in Plattenebene:
längs: ≥5000 N/mm²   quer: ≥3200 N/mm²

Influence parameters for the preferred embodiments of the present invention are the beach geometry (length, width, thickness), the orientation of the beach layers to each other, the orientation of the strands within a layer in a desired direction, the proportion and type of binder or mixture of several Binders, the proportion of additives such. As hardeners and paraffins, the ratio between the thickness between the outermost layer and the middle layers or the middle layer, the density profile, which is influenced by the targeted control of process parameters and ultimately the total thickness of the plate and the plate format, which on the intended use are coordinated.
The present invention as well as its preferred embodiments make it possible to achieve the following mechanical-technological properties. These are to be understood as minimum values and indicated as mean values. The dispersion of the parameters is low due to the production. The properties are determined according to EN 789: 1995 "Timber structures - Test method - Determination of the mechanical properties of wood-based materials". This standard regulates the determination of characteristic properties of wood-based materials used for structural purposes in the construction sector. The term "longitudinal" means that the beach orientation of the top skin layer is parallel to the sample length as defined by EN 789, and "transverse" means beach alignment transverse to the sample length. The following information refers to plates with a minimum thickness of 25 mm. Of thinner plates are usually expected even higher characteristics.

Bending strength perpendicular to the plate plane:
longitudinal: ≥30,0 N / mm ² transversely: ≥15,0 N / mm ²

Bending elastic modulus perpendicular to the plate plane:
longitudinal: ≥ 7000 N / mm ² transverse: ≥3000 N / mm ²

Shear strength in plate plane:
longitudinal: ≥1,2 N / mm ² transversely: ≥1,40 N / mm ²

Shear modulus in plate plane:
longitudinal: ≥200 N / mm ² transversely: ≥190 N / mm ²

Pressure resistance "moist" in plate plane:
longitudinal: ≥24,0 N / mm ² transversely: ≥16,5 N / mm ²

Pressure elastic modulus "damp" in plate plane:
longitudinal: ≥5000 N / mm ² transverse: ≥3200 N / mm ²

Zugfestigkeit in Plattenebene:
längs: ≥ 20,0 N/mm²

Zugelastizitätsmodul in Plattenebene:
längs: ≥ 6000 N/mm²

Druckfestigkeit in Plattenebene:
längs: ≥ 20,0 N/mm²

Druckelastizitätsmodul in Plattenebene:
längs: ≥ 6000 N/mm²

For the wet tests (labeled "wet"), the specimens were stored in water at room temperature for a period of 15 hours prior to testing, with the tests being performed on drained specimens.

Tensile strength in plate plane:
longitudinal: ≥ 20.0 N / mm ²

Tensile modulus at plate level:
longitudinal: ≥ 6000 N / mm ²

Pressure resistance in plate plane:
longitudinal: ≥ 20.0 N / mm ²

Print elasticity module in plate plane:
longitudinal: ≥ 6000 N / mm ²

Biegefestigkeit senkrecht zur Plattenebene:
längs: ≥ 35,0 N/mm²   quer: ≥ 10,0 N/mm²

Biegeelastizitätsmodul senkrecht zur Plattenebene:
längs: ≥ 8000 N/mm²   quer: ≥ 2000 N/mm²

In a further embodiment of the invention, the following properties are given:

Bending strength perpendicular to the plate plane:
longitudinal: ≥ 35.0 N / mm ² transverse: ≥ 10.0 N / mm ²

Bending elastic modulus perpendicular to the plate plane:
longitudinal: ≥ 8000 N / mm ² transverse: ≥ 2000 N / mm ²

The properties of the invention Wood panels are determined by the geometry of the beach and the most uniform possible design of the beach Cover layer, the ratio of thickness of the cover layers to Total thickness or the basis weight of the cover layer for total basis weight of the plate and the middle one specific weight of the plate (density) influenced.

Strands für die äußeren Lagen (Decklage):

Länge: 130 - 180 mm

Breite: 10 - 30 mm

Dicke: 0,4 - 1,0 mm

Strands für die Mittellage:

Länge: 90 - 180 mm

Breite: 10 - 30 mm

Dicke: 0,4 - 1,0 mm

It has been found that the following parameters with regard to the beach dimensions are advantageous for achieving the desired mechanical-technological properties:

Strands for the outer layers (cover layer):

Length: 130 - 180 mm

Width: 10 - 30 mm

Thickness: 0.4 - 1.0 mm

Strands for the middle layer:

Length: 90 - 180 mm

Width: 10 - 30 mm

Thickness: 0.4 - 1.0 mm

The two outer layers (outer layers) should consist in the finished product of at least 30 percent by weight of the total scattered chip quantity, which in sum of upper and lower cover layer corresponds to a proportion of at least 60%. The remaining 40% account for the middle layer in a 3-layer plate. The specific weight of the plate should not exceed 700 kg / m ³ , a value equal to or less than 650 kg / m ³ is desirable. This information refers to dry plates.

The production of the beaches is usually done Roundwood, which preferably in debarked condition is present. The logs will become one Zerspanungsmaschine (Flaker) fed, which in one single operation by beach rotating tools the desired dimension. A multi-level However, manufacturing the beaches is just as conceivable as z. B. from a peeled veneer, which in another Work step is shredded into strands.

Advantageous for achieving the desired Properties is that the proportion of fines in the individual layers is reduced to a minimum. Under Fines are beaches that are significantly different from the previously described dimensions of the beaches differ. Primary should during production of the Incident of fines be avoided such. B. by a Gentle debarking and regular sharpening of the Cutting tools of the flaker. After the beach production is a separation of the fines from the beaches but just as conceivable.

Of course, even with the most careful beach production and conscientious separation of the proportion of fines only to a still tolerable minimum share be reduced, but not prevented. Of the Fines content, can be quite 10 to 15 percent by weight based on the weight of the finished plate.

The wood of the beach is not relevant. In principle, all types of wood such. Poplar, birch, Beech, oak, spruce, pine and the like possible. When The pine is particularly suitable due to its good machining properties and due to their exposed relatively high proportion of resin.

To reduce the swelling properties can Paraffins or waxes are added. The application can in the form of a melt at the required elevated temperature (liquid wax order) or for emulsions at about room temperature.

As binder types have urea-formaldehyde glues (UF), melamine-formaldehyde glues (MF), phenol-formaldehyde glues (PF), binder based on Isocyanate (eg PMDI) but also binders based on proven by acrylates. Mostly a mixture of at least two of these types of binder used but also mixtures of several types of glue is conceivable. The mixture is not just a mixture of different types of ready-to-use binders understood, but also a mixture of different of the mentioned types, which already in the course of the Production as a mixture yields. So z. B. melamine-urea-formaldehyde glues (MUF) or melamine-urea-phenol-formaldehyde glues (MUPF) by cooking together be prepared in the same reaction vessel (reactor). The individual layers of the plate can also be different Include types of binders and mixtures thereof, where it is in multilayer plates Stability reasons is advantageous, those layers that each - based on the plate surfaces - in the same position are arranged with the same Binder type or the same mixture to provide. So has been shown to be the requirements of the invention be achieved very well in a 3-layer plate can, if the upper and lower cover layer with a MUPF binder is provided and the middle layer with an isocyanate-based binder (PMDI).

The proportion of binder and the type of binder are decisive for the desired mechanical-technological Properties. The content of binder depends on the binder type. binder contents for UF, MF, PF and their mixtures are in the range between 10 and 15% by weight (for mixtures as the sum of used components) calculated as solid resin on the dry mass of wood strands. When using Isocyanates, the binder content to 5 to 10 wt. % be reduced.

The gluing of the beaches takes place before the formation of the Beach mat. Usually, this is great dimensioned Beleimtrommeln provided that a allow continuous gluing in the pass. The Drums rotate around their own longitudinal axis and hold thereby the introduced beach material constantly in Move. In the drums, a finer one becomes by means of nozzles Leim mist generated that spreads evenly on the beach reflected. The drums have built-ins to on the one hand the beach material constantly pick up again and on the other the beach material from the enema in To transport the drum to the outlet. A Slanting the drum in the longitudinal direction, the Support forward movement of the beaches.

Achieving the desired mechanical-technological Characteristics is determined by the orientation of the Strands influenced.

Especially in a single-layer panel as well the outer layers of multilayer plates should the Orientation of the strands preferably in one direction (e.g. parallel to the plate length = production direction) done, giving a high degree of orientation should be. The% rate of chips more than +/- 15 ° of may deviate from the chosen direction of orientation low. Nevertheless, in "transverse" direction of the plate, still sufficient strength and stiffness before, because through the scattering process always a deviation from the Target orientation is given.

For 3-ply or multi-ply boards is the Target orientation of the strands from the position of Beach location within the plate dependent. The two outermost layers, the cover layers, should be parallel to Plate length as before for a single-layer plate be aligned described. Considering a 3-tiered one OSB board, so the beaches are the only ones Central position oriented without a preferred direction (Random).

A plate assembly of more than 3 layers is as well conceivable. As a rule, the number of layers becomes odd be, with the beach orientation of the cover layers and the Middle position as previously described and orientation the other layers can be arbitrary. So it is conceivable that the preferred beach orientation of these others Lay crosswise to the beach orientation of each outer adjacent location. A random orientation individual layers is also possible.

The shaping of the beach mat from the different ones superimposed layers is from a spreader accomplished. For each layer is usually one Scattered head available. This has the task the glue Strands oriented in the desired direction or randomorientiert to arrange. After spreading the mat takes place pressing into a stable plate-shaped product under the influence of pressure and temperature. This can both in cycle presses (single or multi-day presses) done or in continuously operating presses. The latter enable the production of an endless Plate tape, which is separated into the desired formats can be.

The plates can be ground after production. This achieves a homogeneous plate thickness with small thickness tolerances and improved conditions for the gluing of two or more panels to components as described below. If sufficient Plate surface quality and sufficient Thickness tolerance of the plates is but a gluing without previous touch also possible.

Fig. 1

ein erstes Ausführungsbeispiel einer erfindungsgemäßen OSB-Platte,

Fig. 2

den Schichtaufbau der OSB-Platte,

Fig. 3

zwei Beispiele eines aus OSB-Platten aufgebauten Bauelementes und

Fig. 4

den Aufbau eines großflächigen Bauelementes aus OSB-Platten.

The invention is explained in more detail below with reference to embodiments, reference being made to the accompanying drawings. In the drawing show

Fig. 1

A first embodiment of an OSB board according to the invention,

Fig. 2

the layer structure of the OSB board,

Fig. 3

two examples of a constructed of OSB panels and component

Fig. 4

the construction of a large-scale component made of OSB boards.

FIG. 1 shows one as described above Wood-based panel 1, which consists of three beach locations is. The upper beach 2 shows a preferred Orientation of the strands 5 in the longitudinal direction of Plate. It can be seen that the beaches 5 of the Cover layer 2 not strictly parallel to the plate length are aligned, but still a high Orientation is given. The middle layer 3 exists from strands 6, which are slightly smaller in size are as the strands of the cover layers 2 and 4. The Orientation of the strands 6 of the middle layer 3 is random. The lower cover layer 4 is a mirror image of upper cover layer 2 constructed. The names "Plate length" and "plate width" for those in Figure 1 shown plate 1 are only as a reference exemplary for a part of a chosen large-sized plate and must match the real one Dimensions plate length and plate width not to match. FIG. 1 also shows that the thickness s1 the two cover layers (both the lower cover layer 4 as also the mirror-image constructed upper cover layer 2) each about 30% of the total thickness s of the plate is and the Thickness s2 of the middle layer 3 about 40%.

The produced by the method described above Single plates 1 can have a thickness s to about 50 mm and Formats of 2.8 x 15 m and may have in the construction sector be used manifold. The plate length of 15 m should not be understood as an upper limit here. It has been shown that both for the production and the subsequent disk manipulation in the course of Further processing here a meaningful order of magnitude 10 to 15 m.

Add several plates (eg 3 x 32 mm = 96 mm) a sandwich element of greater strength, so you win large-area components. FIG. 2 shows a schematic view Such component 10 made of 3 individual plates 1 is. For this purpose, the individual plates 1 with an adhesive such as B. isocyanate at least partially over a large area bonded. This component can, for. B. in building for Außenund Interior walls are used, with the benefits of that Elements according to the wall length seamless over one full storey height (up to 2.8 m) can be produced can. The common house building practice (eg single-family home, Apartment building) shows that wall elements with a Length between 10 and 15 m quite sufficient to whole To make wall, ceiling, and roof elements. With regard to the length of plates or components also to take into account that in the course of transport these parts from the place of manufacture to the place of Further processing or use of certain limits available. From this point of view is the meaningful maximum plate and component length also too understand. The required recesses like windows and doors can by means of usual Machining equipment for solid wood such as saws and Milling machines are worked out.

From the aforementioned large-area sandwich panels But also carriers can be made such that Strip the desired beam width or beam height be made from it. The stripes will be cut out according to the length of the plate, bringing a Beam length up to 15 m is possible. These carriers can one or both sides with large format OSB boards be united for the training of ceiling, wall or Roof elements that have sufficient stability, Overvolt surges of several meters.

FIG. 3 shows two different embodiments. In Figure 3 a) consists of the ceiling, wall or roof element 20th from a carrier 22, an upper plate 21 and a lower plate 23. The plate 21 is in itself again from 2 individual plates 1, the carrier 22 is in itself again from 3 single plates 1. The plates 21 and 22 are with the carrier 22 positively or positively connected. Is the component 21 a Ceiling element, so the plate 21 takes over the function the floor of the upper floor and the plate 23 the Function of the ceiling of the lower floor. The same applies mutatis mutandis, for the figure 3 b). Here it is Component 20 of an upper plate 31, the only one single plate 1 is constructed, further from the carrier 32 and from the lower plate 33. The carrier 32 is in Contrary to the carrier 22 arranged horizontally.

FIG. 4 shows the structure of a large area Component 20 that from a variety of individual plates 1 is constructed. The length L can be up to 15 m and the Width B can be up to 2.8 m. The carriers 23, 33 are firmly connected to the plates 21,31 and 22,32. Thereby has the component in combination with the high mechanical-technological properties of the individual plates 1 itself over a high inertia.

EXAMPLE 1:

The 3-layer OSB board of the following example was manufactured on an industrial plant.

The production of the strands for the middle and top layer takes place until the matting on separate Processing strands. Made of barked pine trunks become strands with a length of approx. 150 mm, one Width between 10 and 25 mm and a thickness between 0.5 and 0.8 mm. Fines are, as far as possible, already separated. The subsequent drying is reduced the moisture content of the strands of both layers to one value between 3 to 5%. Before the gluing is the Fines content minimized by means of screening devices. The Gluing is done in Beleimtrommeln, with the top layer with about 13 wt.% Melamine-urea-phenol-formaldehyde glue (Solid resin based on wood dry matter) and the Middle layer mixed with 8% by weight of a PMDI binder were.

Biegefestigkeit nach EN 789 senkrecht zu Plattenebene, längs: 36,9 N/mm²

Biegeelastizitätsmodul nach EN 789 senkrecht zu Plattenebene, längs: 8322 N/mm²(maximaler Wert 8816 N/mm²)

Dichte bei ca. 12% Feuchtigkeit: 645 kg/m³

Plattendichte bei 0% Feuchtigkeit: 585 kg/m³

Then the mat formation takes place on a width of about 2.80 m, wherein first the strands of the lower cover layer are placed with a beach orientation in the production direction, then the random-scattered middle layer without a unidirectional beach orientation and finally the upper cover layer, the beach orientation also takes place in the direction of production , The basis weight of the lower cover layer based on the total mat weight is 36%, that of the middle layer 28% and the upper cover layer also 36%. The mat thus obtained is pressed under the action of pressure and temperature to an OSB plate with a final thickness of 33.5 mm and then the continuous plate produced in a continuous process is separated into formats of 12.0 x 2.80 m. After a maturation time of 5 days, the plate has the following properties (average of 5 experiments):

Bending strength according to EN 789 perpendicular to plate plane, longitudinal: 36.9 N / mm ²

Flexural modulus according to EN 789 vertical to plate plane, longitudinal: 8322 N / mm ² (maximum value 8816 N / mm ² )

Density at approx. 12% moisture: 645 kg / m ³

Plate density at 0% humidity: 585 kg / m ³

Biegefestigkeit nach EN 408 senkrecht zu Plattenebene, längs: 23,8 N/mm²

Biegeelastizitätsmodul nach EN 408 senkrecht zu Plattenebene, längs: 6393 N/mm²

Three such plates thus obtained were ground to a thickness of 32 mm and bonded together by means of an adhesive based on isocyanate with each other over the entire surface to form a plate element with a total thickness of 96 mm under the action of pressure. The sandwich element thus obtained has the same dimensions as the individual plates (2.80 x 12.0 m) and has the following properties (average of 5 experiments):

Bending strength according to EN 408 perpendicular to plate plane, longitudinal: 23.8 N / mm ²

Flexural modulus according to EN 408 perpendicular to plate plane, longitudinal: 6393 N / mm ²

(The DIN EN 408, issued March 2001, entitled "Timber Structures - Lumber for structural purposes and Glued laminated timber - Determination of some physical and mechanical properties "specifies test methods for Determination of measures, wood moisture, density and describes the conditions of test specimens of lumber for carrying purposes and for glulam. This standard was analogous to the examination of the previously described , Sandwich element applied).

EXAMPLE 2

The 3-layer OSB board of the following example was manufactured on an industrial plant.

The production of the strands for the middle and top layer takes place until the matting on separate Processing strands. Made of barked pine trunks become strands with a length of approx. 140 mm, one Width between 10 and 30 mm and a thickness of approx. 0.6 mm produced. Fines are, as far as possible, already separated. The subsequent drying reduces the Moisture content of the strands of both layers to one value between 3 to 5%. Before the gluing is the Fines content minimized by means of screening devices. The Gluing is done in Beleimtrommeln, with the top layer with about 7.0 wt.% PMDI (solid resin based on Wood dry matter) and the middle layer with 5.5% by weight of a PMDI binders were mixed.

Biegefestigkeit nach EN 310 senkrecht zu Plattenebene, längs: 51,5 N/mm²

Biegeelastizitätsmodul nach EN 310 senkrecht zu Plattenebene, längs: 8352 N/mm²(maximaler Wert 9004N/mm²)

Zugfestigkeit nach EN 408 in Plattenebene, längs: 25,3 N/mm² (Mittelwert aus 4 Versuchen)

Zugelastizitätsmodul nach EN 310 in Plattenebene, längs: 7392 N/mm² (Mittelwert aus 4 Versuchen)

Plattenfeuchtigkeit: ca 8%

Plattendichte bei 0% Feuchtigkeit: 629 kg/m³

Then the mat formation takes place on a width of about 2.80 m, wherein first the strands of the lower cover layer are placed with a beach orientation in the production direction, then the random-scattered middle layer without a unidirectional beach orientation and finally the upper cover layer, the beach orientation also takes place in the direction of production , The basis weight of the lower cover layer based on the total mat weight is 35%, that of the middle layer 30% and the upper cover layer also 35%. The resulting mat is pressed under the action of pressure and temperature to an OSB plate with a final thickness of 24.8 mm and then the continuous plate produced in a continuous process in formats of 12.0 x 2.80 m is separated. After a maturing time of 5 days, the plate, which is also uncut as in Example 1, has the following properties (mean value of 10 tests)):

Bending strength according to EN 310 perpendicular to plate plane, longitudinal: 51.5 N / mm ²

Flexural modulus according to EN 310 perpendicular to plate plane, longitudinal: 8352 N / mm ² (maximum value 9004N / mm ² )

Tensile strength according to EN 408 in plate plane, longitudinal: 25.3 N / mm ² (average of 4 tests)

Tensile modulus according to EN 310 in plate plane, longitudinal: 7392 N / mm ² (average of 4 experiments)

Plate humidity: about 8%

Plate density at 0% humidity: 629 kg / m ³

EXAMPLE 3

The 1-layer OSB board of the following example was manufactured on an industrial plant.

Stranded pine trunks become strands with one Length of about 140 mm, a width between 10 and 30 mm and a thickness between 0.5 and 0.6 mm. Fines are, as far as possible, already separated. The subsequent drying reduces the moisture content of the Strands to a value between 3 to 5%. Before the Gluing is the fines content by means of Screening minimized. The gluing is done in Beleimtrommeln, whereby with approx. 7,0Gew. % PMDI (solid resin based on wood dry matter) were mixed. (Poll with Wismar)

Biegefestigkeit nach EN 310 senkrecht zu Plattenebene, längs: 47,2 N/mm²

Biegeelastizitätsmodul nach EN 310 senkrecht zu Plattenebene, längs: 8488 N/mm²

Zugfestigkeit nach EN 408 in Plattenebene, längs: 24,2 N/mm² (Mittelwert aus 4 Versuchen)

Zugelastizitätsmodul nach EN 310 in Plattenebene, längs: 7275 N/mm² (Mittelwert aus 4 Versuchen)

Plattenfeuchtigkeit: ca. 8%

Plattendichte bei 0% Feuchtigkeit: 614 kg/m³

Subsequently, the unidirectional mat formation in production direction to a width of about 2.80 m with two successive scattering heads. A "transverse" or "random" oriented middle position is not scattered. The resulting mat is pressed under the action of pressure and temperature to an OSB plate with a final thickness of 24.7 mm and then the endless plate produced in a continuous process is separated into formats of 12.0 x 2.80 m. After a maturing time of 5 days, the uncut plate has the following properties (average values from 10 experiments)

Bending strength according to EN 310 perpendicular to plate plane, longitudinal: 47.2 N / mm ²

Flexural modulus according to EN 310 perpendicular to plate plane, longitudinal: 8488 N / mm ²

Tensile strength according to EN 408 in plate plane, longitudinal: 24.2 N / mm ² (average of 4 tests)

Tensile modulus according to EN 310 in slab plane, longitudinal: 7275 N / mm ² (average of 4 tests)

Plate moisture: approx. 8%

Plate density at 0% humidity: 614 kg / m ³

Claims (29)

1. Multilayer OSB panel with enhanced mechanical-technological properties consisting of at least two layers of strands pressed together and equipped with a binder, whereby the modulus of elasticity in the main loading axis is at least 7000 N/mm²,
   characterised in that
   the panel is a large-format panel with a length of at least 7.0 m and a width of at least 2.60 m and that the strands of the outer layers have a length of between 130 and 180 mm, a width of between 10 and 30 mm and a thickness of between 0.4 and 1 mm.
2. OSB panel according to claim 1,
   characterised in that the panel width is at least 2.80 m.
3. OSB panel according to one of claims 1 or 2,
   characterised in that the strands of the middle layer have a length of between 90 and 180 mm, a width of between 10 and 30 mm and a thickness of between 0.4 and 1 mm.
4. OSB panel according to one of claims 1 to 3,
   characterised in that the panel length is at least 11 m.
5. OSB panel according to one of claims 1 to 4,
   characterised in that the flexural strength in the main loading axis is at least 30 N/mm², in particular 35 N/mm², preferably at least 40 N/mm².
6. OSB panel according to one of claims 1 to 5,
   characterised in that the modulus of elasticity in shear parallel to the panel plane is at least 200 N/mm².
7. OSB panel according to one of claims 1 to 6,
   characterised in that the transverse shear strength parallel to the panel plane in the longitudinal axis is at least 1.2 N/mm².
8. OSB panel according to one of claims 1 to 7,
   characterised in that the modulus of elasticity in the main loading axis is at least 8000 N/mm².
9. OSB panel according to one of claims 1 to 8,
   characterised in that the strength in the panel plane in the longitudinal axis ≥ 20.0 N/mm².
10. OSB panel according to one of claims 1 to 9,
    characterised in that the modulus of elasticity in extension in the panel plane in the longitudinal axis ≥ 6000 N/mm².
11. OSB panel according to one of claims 1 to 10,
    characterised in that the compression strength in the panel plane in the longitudinal axis ≥ 20.0 N/mm².
12. OSB panel according to one of claims 1 to 11,
    characterised in that the modulus of elasticity of compression in the panel plane in the longitudinal axis ≥ 6000 N/mm².
13. OSB panel according to one of claims 1 to 12,
    characterised in that as binder a urea-formaldehyde glue (UF), a melamine formaldehyde glue (MF), a phenol formaldehyde glue (PF) or a binder based on isocyanate, such as for example PMDI, or acrylate-based is used.
14. OSB panel according to claim 13,
    characterised in that as binder a melamine urea formaldehyde glue or a melamine urea phenol formaldehyde glue is used.
15. OSB panel according to claims 13 and 14,
    characterised in that as binder a mixture of at least two of the binders mentioned in claims 9 and 10 is used.
16. OSB panel according to one of claims 1 to 15,
    characterised in that the proportion of the binder amounts to 6 to 18% calculated as solid binder as a proportion of the dry mass of wood.
17. OSB panel according to one of claims 1 to 16,
    characterised in that the panel contains paraffin and/or wax to reduce swelling properties.
18. OSB panel according to claim 17,
    characterised in that the proportion amounts to 0.5 and 1% calculated as solid as a proportion of the dry mass of wood.
19. OSB panel according to one of claims 1 to 18,
    characterised in that the OSB panel consists of an odd number of layers, preferably of 3 layers.
20. OSB panel according to claim 19,
    characterised in that the outer covering layers have a preferred orientation of the strands in the longitudinal axis of the panel and the strands of the middle layers of the panels are aligned with no discernible orientation.
21. OSB panel according to claim 19 or 20,
    characterised in that the strands of the middle layer and/or of the middle layers are disposed at an angle of 90° offset with respect to the nominal orientation of the immediately adjacent outer layer, whereby the maximum deviation is plus/minus 30°.
22. OSB panel according to one of claims 19 to 21,
    characterised in that the thickness of the panel lies between 12 and 50 mm, preferably between 28 and 42 mm.
23. OSB panel according to one of claims 19 to 22,
    characterised in that the thickness of at least one of the outer cover layers amounts to at least 30% of the total thickness of the panel.
24. OSB panel according to one of claims 1 to 23,
    characterised in that the specific weight of the panel (density) lies under 700 kg/m³, preferably under 650 kg/m³, at 0° relative humidity.
25. OSB panel according to one of claims 1 to 24,
    characterised in that the OSB panel is forms single, seamless large areas and is part of a building component.
26. OSB panel according to claim 25,
    characterised in that the OSB panel represents one part of a wall construction of a house, whereby the panel width corresponds to the storey height and the panel length to the length of the wall.
27. OSB panel according to claims 25 and 26,
    characterised in that the panel has a length of up to 15 m and a width of up to 2.8 m.
28. Building component with at least two OSB panels according to one of claims 1 to 24,
    characterised in that
    the OSB panels are bonded together at least partially, in particular over their entire areas.
29. Building component according to claim 28,
    characterised in that the OSB panels are joined over a large area and seamlessly and represent a wall construction comprising at least one storey height.

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