EP1267010A1 - 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 OSB board in the sense of this invention consists of at least one layer covered with flat wood shavings, so-called beaches is built. The strands 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-layer plate, so is used in the course of the production of this plate a lower and a mirror-like top layer united in a homogeneous position.

In the case of a multilayer structure, the layer described above forms the lower and upper cover layer and in between the middle layer (with 3-layer version), which has no preferred orientation of the stands. This Scattering is also known in technical terms as "Random". The innermost layer of the Plate labeled. So there is a 3-layer board from an upper and a lower cover layer and one Middle layer, a 5 or multi-layer plate from one upper and lower top layer, from a middle layer and from Layers between the upper or lower top layer and the Central location. A preferred embodiment of the invention is a 3-layer plate, 5-layer or still multilayer plates (being an odd number of Layers makes sense). However, there are even numbers of layers just as conceivable.

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

The technical problem outlined above will according to the invention by an OSB board with the features of claim 1 solved. Further refinements are in specified in the subclaims and in the following described in detail.

The present invention describes a large format Wood-based panel, a component made from it as well as a method for producing a large format Plate with high mechanical properties such as for example the parameters for bending, tension and compression, without the specific weight of the plate normal size to raise. Furthermore, technological Features 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 relative to one another, the orientation of the beaches within a layer in a desired direction, the proportion and the type of binder or the mixture of several Binders, the proportion of additives such. B. hardeners and paraffins, the ratio with regard to 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 plate thickness and the plate format, which are based on the intended use are coordinated.
The present invention and its preferred configurations enable the following mechanical and technological properties to be achieved. These are to be understood as minimum values and stated as mean values. The scatter of the parameters is small due to the manufacturing process. The properties are determined in accordance with EN 789: 1995 "Wood structures test method - determination of the mechanical properties of wood materials". This standard regulates the determination of characteristic properties for wood-based materials that are used for load-bearing purposes in the construction sector. The term "longitudinal" means that the beach orientation of the upper cover layer is parallel to the sample length in the sense of EN 789, and "transverse" means a beach orientation transverse to the sample length. The following information refers to sheets with a minimum thickness of 25 mm. As a rule, even higher parameters can be expected from thinner panels.

Bending strength perpendicular to the plate plane:

longitudinal: ≥30.0 N / mm ² transverse: ≥15.0 N / mm ²

Bending modulus of elasticity perpendicular to the plate plane:

longitudinal: ≥ 7000 N / mm ² transverse: ≥3000 N / mm ²

Shear strength at the plate level:

longitudinal: ≥1.2 N / mm ² transverse: ≥1.40 N / mm ²

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

transverse: ≥190 N / mm ²

Compressive strength "moist" at the plate level:

longitudinal: ≥24.0 N / mm ² transverse: ≥16.5 N / mm ²

Compressive elasticity module "damp" at the plate level:

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 (called "wet"), the test specimens were stored in water at room temperature for a period of 15 hours before the test, the tests being carried out on drained samples.

Tensile strength at the plate level:

longitudinal: ≥ 20.0 N / mm ²

Tensile modulus at the slab level:

longitudinal: ≥ 6000 N / mm ²

Compressive strength in the plate level:

longitudinal: ≥ 20.0 N / mm ²

Compression elasticity module at the plate level:

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

The following properties are provided in a further embodiment of the invention:

Bending strength perpendicular to the plate plane:

longitudinal: ≥ 35.0 N / mm ² transverse: ≥ 10.0 N / mm ²

Bending modulus of elasticity perpendicular to the plate plane:

longitudinal: ≥ 8000 N / mm ² transverse: ≥ 2000 N / mm ²

The properties of the invention Wood-based panels are characterized by the beach geometry and the most uniform possible design of the beaches of the Top layer, the ratio of the thickness of the top layers to Total thickness or the weight per unit area of the top layer total basis weight of the plate and the average 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 shown that the following parameters with regard to the beach dimensions are advantageous for achieving the desired mechanical-technological properties:

Strands for the outer layers (top 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 top layers (outer layers) should each consist of at least 30 percent by weight of the total amount of chips scattered in the finished product, which corresponds to a share of at least 60% of the top and bottom top layers. The remaining 40% is accounted for by the middle layer of a 3-layer board. The specific weight of the board should not exceed 700 kg / m ³ , a value less than or equal to 650 kg / m ^{3 should} be aimed for. This information relates to dry panels.

The beaches are usually made from Logs, which are preferably in their debarked condition is present. The logs become one Cutting machine (flaker) fed, which in one single operation by strands rotating tools the desired dimension. A multi-stage Production of the beaches is just as conceivable as e.g. B. from a peeled veneer, which in another Working step to strands is crushed.

Advantageous for achieving the desired Characteristics is that the proportion of fines in the individual layers is reduced to a minimum. Under Fine goods are understood to be strands that differ significantly from the dimensions of the beaches described above differ. The primary aim is to manufacture the Accumulation of fines can be avoided such. B. by a gentle debarking and regular sharpening of the Flaker cutting tools. After making the beach is a separation of the fine material from the beaches equally conceivable.

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

The type of wood of the beaches is not relevant. In principle, all types of wood such as B. poplar, birch, Beech, oak, spruce, pine and the like possible. As The pine is particularly suitable due to its good cutting properties and because of their relatively high resin content highlighted.

Can reduce swelling properties Paraffins or waxes can be added. The application can be in the form of a melt if necessary elevated temperature (liquid wax application) or for emulsions at around room temperature.

Urea-formaldehyde glues have been found as binder types (UF), melamine-formaldehyde glue (MF), phenol-formaldehyde glue (PF), binder based on Isocyanate (e.g. PMDI) but also binder based proven by acrylates. Mostly a mixture of used at least two of these types of binders but mixtures of several types of glue are also conceivable. Not only a mixture of various types of binders already in use understood, but also a mixture of different of the listed types, which has already been developed in the course of the Manufactured as a mixture. So z. B. melamine-urea-formaldehyde glues (MUF) or melamine-urea-phenol-formaldehyde glue (MUPF) by cooking together be produced in the same reaction vessel (reactor). The individual layers of the plate can also be different Types of binders and mixtures thereof include taking it off with multilayer boards Stability is advantageous, those layers that each - based on the plate surfaces - in the are arranged in the same position, with the same Binder type or the same mixture. So has been shown to meet the requirements of the invention can be achieved very well with a 3-layer board can, if the upper and lower top layer with a MUPF binder is provided and the middle layer with an isocyanate-based binder (PMDI).

The proportion of binder and the binder type are decisive for the desired mechanical-technological Characteristics. The binder content depends on the type of binder. 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 the components used) calculated as solid resin on the dry mass of wooden beaches. When using Isocyanates can the binder content to 5 to 10 wt. % be reduced.

The beaches are glued before the formation of the Beach mat. Usually are big for that Dimensioned glue drums provided that a enable continuous gluing in one pass. The Drums rotate around their own longitudinal axis and hold thereby constantly bringing in the beach material Move. In the drums, a fine one is made by means of nozzles Glue mist generated that spreads evenly on the beaches reflected. The drums have built-in to on the one hand to constantly pick up the beach material again can and secondly the beach material from the inlet in to transport the drum to the outlet. A The inclination of the drum in the longitudinal direction can Support forward movement of the beaches.

The achievement of the desired mechanical-technological The targeted alignment of the properties Strands influenced.

Especially with a single-layer plate as well the top layers of multi-layer boards should Orientation of the beaches preferably in one direction (e.g. parallel to the plate length = production direction) take place, given a high degree of orientation should be. The% rate of chips that are more than +/- 15 ° from the chosen direction of orientation may differ low. Nevertheless, in the "transverse" direction of the plate, sufficient strength and rigidity before, because due to the spreading process always a deviation from the Target orientation is given.

For 3-ply or multi-ply panels, this is Target orientation of the beaches from the position of the Beach location depending on the plate. The two outermost layers, the top layers, should be parallel to Board length as before for a single-layer board described. If you consider a 3-layer OSB board, so the strands are the only one Oriented towards the middle without a preferred direction (Random).

A board construction from more than 3 layers is also conceivable. As a rule, the number of layers becomes odd be, the beach orientation of the top layers and the Middle position as described above and orientation the other layers can be any. So it is conceivable that the preferred beach orientation of these others Lying crosswise to the beach orientation of each outer adjacent location. A random orientation individual layers is also possible.

The formation of the beach mat from the different layers lying on top of each other is used by a spreader accomplished. There is usually one for each location Spreading head available. This has the task of gluing Strands oriented in the target direction or randomly oriented to arrange. After spreading the mat is done 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) take place or in continuously operating presses. The latter allow the production of an endless Plate tape, which is cut into the desired formats can be.

The boards can be sanded after production. In this way you achieve a homogeneous plate thickness small thickness tolerances and improved conditions for the gluing of two or more panels into components as described below. With sufficient Board surface quality and sufficient However, the thickness tolerance of the panels is without previous grinding 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 on the basis of exemplary embodiments, reference being made to the accompanying drawing. Show in the drawing

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 component made of OSB panels and

Fig. 4

the construction of a large component from OSB panels.

Figure 1 shows one as previously described Wood-based panel 1, which consists of three beach layers is. The top beach location 2 shows a preferred one Orientation of the beaches 5 in the longitudinal direction of the Plate. One can see that the strands 5 of the Top layer 2 not strictly parallel to the board length are aligned, but still a high one Degree of orientation is given. The middle layer 3 exists from strands 6, which are somewhat smaller in size are as the beaches of the top layers 2 and 4. The Alignment of the strands 6 of the middle layer 3 is random. The lower cover layer 4 is a mirror image of upper top layer 2 built. The labels “Plate length” and “plate width” for those in FIG. 1 Plate 1 shown are only for reference exemplary of a section from a large format plate chosen and must match the real one Dimensions of panel length and panel width are not to match. Figure 1 also shows that the thickness s1 of the two cover layers (both the lower cover layer 4 and also the mirror-image top layer 2) is approximately 30% of the total thickness s of the plate and the Thickness s2 of the middle layer 3 approx. 40%.

The manufactured by the previously described method Single plates 1 can have a thickness s up to approx. 50 mm and Have formats of 2.8 x 15 m and can be used in construction be used in a variety of ways. The plate length of 15 m should not be understood here as an upper limit. However, it has been shown that both for the manufacture and the subsequent plate manipulation in the course of Further processing here makes sense 10 to 15 m.

If you combine several plates (e.g. 3 x 32 mm = 96 mm) a sandwich element of greater strength, that's how you win large components. Figure 2 shows a schematic such component 10 which is made from 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 e.g. B. in house construction for outside and Interior walls are used, with the advantages that Elements seamlessly over a wall length full floor height (up to 2.8 m) can. The usual house building practice (e.g. single family house, Apartment building) shows that wall elements with a Lengths between 10 and 15 m are quite sufficient to cover whole To be able to manufacture wall, ceiling and roof elements. With regard to the length of plates or components also to take into account that in the course of transportation these parts from the place of manufacture to the place of Further processing or use certain limits available. From this point of view, the reasonable maximum panel and component length too understand. The necessary recesses like windows and doors can be made using standard Processing devices for solid wood such as saws and Milling cutters.

From the aforementioned large sandwich elements can also be manufactured in such a way that Strips of the desired beam width or height be made from it. The stripes will cut out according to the length of the plate, with which one Beam lengths of up to 15 m are possible. These carriers can on one or both sides with large format OSB panels be united for the formation of ceiling, wall or Roof elements that have sufficient stability, To bridge surge voltages of several meters.

FIG. 3 shows two different embodiments. In FIG. 3 a) there is the ceiling, wall or roof element 20 from a support 22, an upper plate 21 and one lower plate 23. The plate 21 is in itself again from 2 individual plates 1, the carrier 22 consists in itself again from 3 single plates 1. The plates 21 and 22 are with the carrier 22 non-positively or positively connected. Is component 21 a Ceiling element, 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 analogously for Figure 3 b). Here it is Component 20 from an upper plate 31, which consists of only one single plate 1 is constructed, further from the carrier 32 and from the lower plate 33. The carrier 32 is in In contrast to the carrier 22 arranged horizontally.

Figure 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 up to 2.8 m. The supports are 23, 33 firmly connected to the plates 21.31 and 22.32. Thereby the component in combination with the high mechanical-technological properties of the individual panels 1 itself has a high load-bearing capacity.

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 on separate until mat formation Processing strands. From barked pine trunks are 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 manufactured. 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 gluing, the Fines content minimized by means of screening devices. The Gluing takes place in glue drums, with the top layer with approx. 13% by weight melamine-urea-phenol-formaldehyde glue (Solid resin based on dry wood mass) 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

Subsequently, the mat is formed to a width of approx.2.80 m, whereby first the beaches of the lower cover layer are laid with a beach orientation in the production direction, then the randomly scattered middle layer without a unidirectional beach orientation and finally the upper cover layer, whose beach orientation also takes place in the production direction , The weight per unit area 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 obtained in this way is pressed under the action of pressure and temperature to form an OSB board with a final thickness of 33.5 mm and then the continuous board produced in the continuous process is cut into formats of 12.0 × 2.80 m. After a maturation period of 5 days, the plate has the following properties (average of 5 attempts):

Flexural strength according to EN 789 perpendicular to the board plane, longitudinal: 36.9 N / mm ²

Bending elasticity module according to EN 789 perpendicular to the plate plane, lengthways: 8322 N / mm ² (maximum value 8816 N / mm ² )

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

Board 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 obtained in this way were ground to a thickness of 32 mm and glued to one another over the entire surface by means of an isocyanate-based adhesive to form a plate element with a total thickness of 96 mm under the action of pressure. The sandwich element obtained in this way has the same dimensions as the individual panels (2.80 x 12.0 m) and has the following properties (average of 5 tests):

Flexural strength according to EN 408 perpendicular to the plane of the board, lengthways: 23.8 N / mm ²

Bending elasticity module according to EN 408 perpendicular to the plate plane, longitudinal: 6393 N / mm ²

(The DIN EN 408, issue date March 2001, with the title "Timber structures - timber for structural purposes and Glulam - Determination of some physical and mechanical properties "specifies test methods for determination of dimensions, wood moisture, density and describes the conditions of the test specimens of lumber for load-bearing purposes and for glulam. This norm was used analogously for the examination of the previously described Sandwich elements 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 on separate until mat formation Processing strands. From barked pine trunks are strands with a length of approx. 140 mm, one Width between 10 and 30 mm and a thickness of approx. 0.6 mm manufactured. As far as possible, fine goods will already be separated. The subsequent drying reduces the Moisture content of the strands of both layers to one value between 3 to 5%. Before gluing, the Fines content minimized by means of screening devices. The Gluing takes place in glue drums, with the top layer with approx. 7.0 wt.% PMDI (solid resin based on Dry wood mass) and the middle layer with 5.5% by weight of one PMDI binder 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

Subsequently, the mat is formed to a width of approx.2.80 m, whereby first the beaches of the lower cover layer are laid with a beach orientation in the production direction, then the randomly scattered middle layer without a unidirectional beach orientation and finally the upper cover layer, whose beach orientation also takes place in the production direction , The weight per unit area 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 mat obtained in this way is pressed under the action of pressure and temperature to form an OSB board with a final thickness of 24.8 mm and then the continuous board produced in the continuous process is cut into formats of 12.0 × 2.80 m. After a ripening time of 5 days, the plate, which was also unsanded as in Example 1, had the following properties (average of 10 tests):

Flexural strength according to EN 310 perpendicular to the board plane, longitudinal: 51.5 N / mm ²

Bending elasticity module according to EN 310 perpendicular to the plate plane, lengthways: 8352 N / mm ² (maximum value 9004N / mm ² )

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

Tensile modulus of elasticity according to EN 310 in the slab plane, longitudinal: 7392 N / mm ² (average of 4 tests)

Board moisture: approx. 8%

Board 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.

Barked trunks become strands with a Length of about 140 mm, a width between 10 and 30 mm and a thickness between 0.5 and 0.6 mm. As far as possible, fines are already separated. The subsequent drying reduces the moisture content of the Strands to a value between 3 to 5%. Before the The fine material portion is glued with Screening devices minimized. The gluing takes place in Glue drums, with approx. % PMDI (solid resin based on dry wood mass) 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

Then the unidirectional mat formation takes place in the production direction over a width of approx. 2.80 m with two spreading heads one behind the other. A "transverse" or "random" oriented middle layer is not scattered. The mat obtained in this way is pressed under the action of pressure and temperature to form an OSB board with a final thickness of 24.7 mm and then the continuous board produced in a continuous process is cut into formats of 12.0 × 2.80 m. After a ripening period of 5 days, the unpolished plate has the following properties (mean values from 10 tests):

Flexural strength according to EN 310 perpendicular to the board plane, longitudinal: 47.2 N / mm ²

Bending elasticity module according to EN 310 perpendicular to the plate plane, lengthways: 8488 N / mm ²

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

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

Plate moisture: approx. 8%

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

Claims (30)

Large-format OSB board with increased mechanical-technological properties,
characterized, that the plate has a width of at least 2.60 m and a length of at least 7.0 m and that the bending elastic modulus in the main load direction is at least 7000 N / mm ² . OSB panel according to claim 1,
characterized in that the plate width is at least 2.80 m. OSB panel according to claim 1 or 2,
characterized in that the plate length is at least 11 m. OSB panel according to one of claims 1 to 3,
characterized in that the bending strength in the main loading direction is at least 30 N / mm ² , in particular 35 N / mm ² , preferably at least 40 N / mm ² . OSB panel according to one of claims 1 to 4,
characterized in that the shear modulus parallel to the plate plane is at least 200 N / mm ² . OSB panel according to one of claims 1 to 5,
characterized in that the shear strength parallel to the plate plane in the longitudinal direction is at least 1.2 N / mm ² . OSB panel according to one of claims 1 to 6,
characterized in that the bending elastic modulus in the main load direction is at least 8000 N / mm ² . OSB panel according to one of claims 1 to 7,
characterized in that the tensile strength in the plate plane in the longitudinal direction is ≥ 20.0 N / mm ² . OSB panel according to one of claims 1 to 8,
characterized in that the tensile modulus of elasticity in the plate plane in the longitudinal direction is ≥ 6000 N / mm ² . OSB panel according to one of claims 1 to 9,
characterized in that the compressive strength in the plate plane in the longitudinal direction is ≥ 20.0 N / mm ² . OSB panel according to one of claims 1 to 10,
characterized in that the pressure elastic modulus in the plate plane in the longitudinal direction is ≥ 6000 N / mm ² . OSB panel according to one of claims 1 to 11,
characterized in that as a binder a urea-formaldehyde glue (UF), a melamine-formaldehyde glue (MF), a phenol-formaldehyde glue (PF) or an isocyanate-based binder such as PMDI or acrylate-based is used. OSB panel according to claim 12,
characterized in that a melamine-urea-formaldehyde glue or a melamine-urea-phenol-formaldehyde glue is used as the binder. OSB board according to claims 12 and 13, characterized in that a mixture of at least two of the binders mentioned in claims 9 and 10 is used as the binder. OSB panel according to one of claims 1 to 14,
characterized in that the proportion of binder is 6 to 18% calculated as a solid binder based on the dry mass of wood. OSB panel according to one of claims 1 to 15,
characterized in that the plate contains paraffin and / or wax to reduce the swelling properties. OSB panel according to claim 16,
characterized in that the proportion is between 0.5 and 1% calculated as a solid based on the dry mass of wood. OSB panel according to one of claims 1 to 17,
characterized in that the OSB panel consists of an odd number of layers, preferably 3 layers. OSB panel according to claim 18,
characterized in that the outer cover layers have a preferred orientation of the strands in the longitudinal direction of the plate and the strands of the middle layer of the plates are oriented without any recognizable orientation. OSB panel according to claim 18 or 19,
characterized in that the strands of the middle layer and / or the middle layers have an arrangement offset by 90 ° for the desired orientation of the immediately adjacent outer layer, the maximum deviation being plus / minus 30 °. OSB panel according to one of claims 18 to 20,
characterized in that the strands of the cover layers have a length between 140 and 180 mm, a width between 5 and 30 mm and a thickness between 0.4 and 1.0 mm. OSB panel according to one of claims 18 to 21,
characterized in that the strands of the middle layer and / or the middle layers have a length between 90 and 180 mm, a width between 5 and 30 mm and a thickness between 0.4 and 1.0 mm. OSB board according to one of Claims 18 to 22,
characterized in that the thickness of the plate is between 12 and 50 mm, preferably between 28 and 42 mm. OSB board according to one of Claims 18 to 23,
characterized in that the thickness of at least one of the outer cover layers is at least 30% of the total thickness of the plate. OSB board according to one of Claims 1 to 24,
characterized in that the specific weight of the plate (density) is less than 700kg / m ^3, preferably less than 650 kg / m ³ at 0 ° humidity. OSB panel according to one of claims 1 to 25,
characterized in that the OSB panel forms large areas in one piece and without joints and is part of a component. OSB panel according to claim 26,
characterized in that the OSB panel forms part of a wall construction of a house, the panel width corresponding to the floor height and the panel length to the wall length. OSB panel according to claims 26 and 27,
characterized in that the plate has a length of up to 15 m and a width of up to 2.8 m. component with at least two OSB panels according to one of claims 1 to 25, characterized, that the OSB panels are glued to one another at least partially, in particular over the entire surface. Component according to claim 29,
characterized in that the OSB panels are connected over a large area and without joints and represent a load-bearing wall structure comprising at least one floor height.

Images