JP5290275B2 - Facade heat insulation board for heat insulation of exterior facade of building, composite heat insulation system including the facade heat insulation board, and method for manufacturing facade heat insulation board - Google Patents

Description

  The present invention relates to a facade heat insulation board for heat insulation of an outer facade of a building, and in particular, as a component of a composite heat insulation system, is composed of bonded mineral wool and satisfies a rated heat conduction value λ <0.040 W / mK according to DIN EN 13162, and a bottom layer And a surface layer, the lower layer is formed of laminar mineral wool, and the surface layer relates to a facade heat insulating board having a configuration including mineral wool having higher mechanical strength than the lower layer. The invention further relates to a composite insulation system according to claim 7 and to a method for producing a facade insulation board according to claim 14.

  The facade heat insulation board of the present invention is often used in a composite heat insulation system that is disposed in a plane adjacent to the facade and forms a heat insulation layer. Here, the facade insulation board is typically bonded and secured to the building facade by means of insulated anchor bolts or washers dowels. The anchor bolt penetrates the facade insulation board, and the facade insulation board is fixed in place by a large area washer dowel. In the case of a composite thermal insulation system, an outer coating is applied to the outside of the facade thermal insulation board and washer dowel, and this outer coating generally consists of a first coat with an embedded reinforcing layer and a final coat as a finish.

  The facade heat insulation board in the composite heat insulation system has a problem due to distortion due to its own weight, the influence of temperature and humidity, particularly due to wind suction. Also, the interaction between the adhesive mortar and the washer dowel provides stress transmission and establishes the stability of the composite thermal insulation system.

  Due to the effects of mortar shrinkage and temperature / humidity fluctuations, bending stresses in the outer coating system, displacement of the outer coating, etc., occur at the peripheral edge of the facade or in the marginal area if subdivided by the outer coating. Deviations in the washer plane are associated with propulsion exceeding the stress caused by the intrinsic load. The only problem with the application of such a composite thermal insulation system is whether the bending stress can cause cracks, and the only problem with its stability is that the temperature and humidity deviations are Whether to cause separation or fragmentation.

  It was found that the contour of the anchor bolt dowel washer emerged over time. In order to remove this contour levitation, it has become a standard mounting method to perform additional mounting, such as placing the washer dowel to sink into the facade insulation board and then closing with mineral wool. According to this method, the thermal bridge effect with the washer dowel disposed in a plane on the facade heat insulating board can be reduced at the same time.

  Mechanical strain in a composite insulation system is most likely to occur due to wind suction, which introduces a tensile stress into the composite insulation system that is crossed across the cross-section of the composite insulation system. It acts perpendicular to the substrate and is further introduced into the facade insulation board, absorbed by the dowels and transmitted to the substrate. Tacky mortar is not considered in these stability tests. The adhesive mortar is not used in an adhesion determination test performed for the purpose of experimentally obtaining a predetermined number of dowels.

Such facade insulation elements or composite insulation systems are respectively EP 1 088 94.
5 A2, EP1 408 168 A1, and DE 103 36 795 A1. The facade insulation board used in the above applications has the shape of a uniform and single layer mineral wool slab, especially a mineral wool slab using rock wool. Today such a facade insulation board is usually used in a heat insulation system satisfying the rated heat conduction value λ = 0.040 W / mK according to the heat conduction group 040, ie DIN EN13162.

  The main element of the stability of such a composite insulation system is the nature of the material that forms the insulation layer of the facade insulation board, which, as described at the beginning, destroys the fiber structure and destroys the facade. It is necessary to have a sufficient tensile stress (lateral tensile stress) acting perpendicularly to the board surface so that it can withstand strain without being partially separated, and in particular can withstand loads due to wind suction. This is to satisfy the desire to keep the heat conduction of the heat insulation layer as low as possible in order to maximize the heat insulation effect of the system. At present, in the bulk density range of commonly used facade insulation boards, the above two effects are in a contradictory relationship that when improved on the one hand, quality degradation occurs on the other.

The number of washer dowels required for stability is a very important economic factor in a composite insulation system. This is because washers dowels are very expensive and time-consuming to apply to facades, so it is a challenge to keep the number as low as possible. The number of washer dowels is determined in particular on the basis of the stability of the building height and the wind suction load. The wind suction load is determined according to the requirements described in DIN 1055 Part 4. The number of dowels required is determined by the total stress transmitted and the load transmission possible per dowel. As a limiting condition, the current range of the number of dowels is between 4 and 12 per m ² in the composite thermal insulation system of the thermal conduction group WLG035.

  In order to prevent an increase in the number of dowels, a two-layered facade insulation board including a compressed surface layer on the outer coating side and a low-density thermal insulation layer on the facade side has been conventionally employed in insulation systems according to WLG 035. . Such a multilayer insulation board may be constituted by a mineral wool web according to DE 37 01 592 A1, having a compressed surface layer and a layered fiber orientation made of the same material as the bottom layer. In the case of the facade heat insulation board configured as described above, the transmission of stress is improved from the washer to the connected area, and the heat insulation board is conveniently fixed to the facade by the hard outer layer. However, it is not preferable to sink the washer dowel and place it to create a depression. This is because the separated surface layer loses the stability effect of the hard surface layer in the washer dowel region, and as a result, stress is not introduced into the washer dowel through the surface layer.

Furthermore, in order to achieve the heat transfer group 035, the product “Silastherm” by the applicant of the present invention using a two-layer facade insulation board is also known. This insulation board
In particular, it has a bottom layer of layered mineral wool having an excellent heat insulating effect due to its fiber orientation. On the side facing the outer coating of the bottom layer, a surface layer containing mineral wool with a three-dimensional isotropic fiber orientation having a heat insulation performance slightly inferior to that of the bottom layer and clearly stronger properties than the bottom layer is disposed. Yes. Such a three-dimensional isotropic fiber oriented mineral wool layer can be obtained by a method based on DE 103 59 902 Al. In this case, a main nonwoven mat having a layered fiber structure, i.e. a nonwoven mat in which the fibers are oriented mainly parallel to the main surface, is established and mineral wool flakes are produced, for example, by peg rollers or carding machines. The mineral wool flakes or single muscle fibers thus obtained are then recombined, respectively, to form a secondary nonwoven mat, resulting in an isotropic fiber orientation in all three spatial directions. Refer to the contents of this specification for further details.

  This approach actually produced a product that was suitably employed for heat transfer group 035. However, in order to obtain the required stability, washers with a diameter of 90 mm or more, or a very large number of small washer dowels must be used instead. This small-diameter washer dowel is not preferable and undesirable because it is actually time-consuming because of cost reasons. In addition, in the product “Silastherm WVP 1-035”, it is impossible to dispose the dowel washer on the facade insulation board.

  Therefore, the object of the present invention is a system having a rated heat conduction value λ <0.040 W / mK in accordance with DIN EN 13162 without requiring a large number of washer dowels for fixing to the facade compared to the prior art. It is to develop a facade insulation board for the insulation of the outer facade of a building, which can be used by sinking a washer dowel. It is a further object of the present invention to provide an excellent composite insulation system and a method for manufacturing the facade insulation board.

  This object is achieved by the fact that the facade insulation board has the features of claim 1. In particular, this is achieved by having the following characteristics. That is, the amount of the binder in the boundary region between the mineral wool surface layer (hereinafter simply referred to as “surface layer”) having higher strength than that of the layered bottom layer and the layered bottom layer is set to be larger than other regions.

  Thus, the present invention is the first to provide a binder that exhibits a non-uniform distribution across the thickness direction of the facade insulation board. Particularly in the construction of the present invention, the layered bottom layer and the surface layer are combined with each other, that is, the better stability of the layer having a higher heat insulating effect and the higher binder amount originally present in the boundary region between the layered bottom layer and the surface layer. By combining with the effect of property, it was possible to obtain a facade heat insulation board having reliable stability. In this way, when applied to a composite insulation system, the fixing stress exerted by the washer on the facade insulation board is particularly preferably transmitted to the adjacent region by the inner layer having a higher binder amount, Interaction with the washer-dwell plays an important role.

  Here, it is further important that the concept of a facade insulation board specifically selected according to the present invention substantially improves the inherent stability and strength of the layer, while not causing any degradation of the insulation properties. It is. Therefore, according to the present invention, it is possible to obtain a facade heat insulation board that satisfies the rated heat conduction value λ <0.040 W / mK in accordance with DIN EN 13162 and is advantageous in terms of energy saving.

  Furthermore, as a result of obtaining excellent strength of the facade heat insulation board according to the present invention, it is substantially the same as the conventional number of washer dowels required for fixing the facade heat insulation board to the outer wall of the building in the composite heat insulation system structure, for example. It became possible to work with the number of washer dowels. According to the present invention, labor and time are increased, the cost is increased, and a further work process is not required because more washer dowels are provided. Also, a washer dowel having a washer with a diameter of less than 90 mm can be used to provide the facade insulation board of the present invention.

  At the same time, whether the facade insulation board is installed in a large area on the surface of the bottom layer facing the outer facade, or installed on the mortar carrier layer of the surface layer, the nature of the facade insulation board according to the present invention is Properties that are superior to those known from the prior art product “Silatherm” are achieved.

  The effects of the facade heat insulation board according to the present invention are described in the appended claims 2 to 9.

The surface layer is formed of mineral wool having a three-dimensional isotropic fiber orientation. Alternatively, the surface layer may consist of upsetting mineral wool. In this case, for example, DE 198
Three-dimensional upsetting of mineral wool is preferred as described in 60 040 Al, the technical details of this document will be described later. As a third option, the surface layer may have the shape of a layered mineral wool having a higher bulk density compared to the layered bottom layer. In this case, the bulk density of this layered surface layer is greater than 150 kg / m ³ , in particular greater than 180 kg / m ³ .

  It is also possible that regions having a higher binder content are essentially contained in the edge layer of the layered bottom layer facing the surface layer. It has been found that the addition of the binder in this portion further effectively increases the strength of the facade heat insulating board according to the present invention. This is because the fiber orientation is formed parallel to the wide surface of the bottom layer. On the other hand, the increase in the binder leads to the hardening of the structure, thereby increasing the tensile stress in the lateral direction. On the other hand, the orientation of a single fiber makes it particularly easy for compressive and tensile stresses to be transmitted to adjacent regions on the same plane, thus enabling a favorable distribution of stress over a large area.

  It is more effective if the average binder amount in the surface layer is larger than the average binder amount in the layered bottom layer. It has also been found that the original stability of the facade insulation board according to the present invention is particularly effectively improved without any effect on the insulation performance. By adding a binder in the surface layer, the individual fibers are more effectively bonded, thereby effectively strengthening the structure.

  Furthermore, the fibers in the surface layer can have a larger average diameter than the fibers in the layered bottom layer. Experiments have confirmed that this method further stabilizes the surface layer and thereby improves the stability of the facade insulation board according to the present invention. In particular, a fiber having a larger diameter of the surface layer distributes the introduced stress to adjacent regions so that the transverse tensile stress due to, for example, wind suction is well absorbed.

  The surface layer should have a sufficient thickness to absorb the load, and even if it is arbitrarily deeply cut or engraved in advance in the process of placing the dowel, the film thickness remains after the washer dowel is sunk. It is configured. However, due to the relatively poor conductivity of the surface layer, it is preferred that this layer does not have an unnecessarily thick film. In actual experiments on products with a film thickness of 100 and 120 mm, a film thickness ratio of 60% of the bottom layer and 40% of the surface layer is particularly suitable for obtaining a system satisfying the rated heat conduction value λ <0.040 W / mK. I understood. When the layered bottom layer is configured to be thicker than the surface layer, suitable properties regarding heat insulation of the bottom layer can be effectively utilized in the facade heat insulation board according to the present invention. In view of such interdependence, it is preferable that the thickness of the facade heat insulating element according to the present invention is increased and the thickness ratio of the surface layer and the bottom layer is decreased.

  If the facade insulation board according to the present invention satisfies the rated heat conduction value λ ≦ 0.036 W / mK according to DIN EN 13162, as is possible with the method according to the present invention, it is also applied to the system of the heat conduction group 035. It can be used conveniently, thereby meeting the strong demands for energy saving regulations. Moreover, it is preferable that the facade heat insulation board which concerns on this invention has rated heat conduction value (lambda) <= 0.035W / mK based on DIN EN13162.

According to another aspect of the present invention (according to claim 10), there is provided a composite thermal insulation system for thermal insulation of an outer facade of a building comprising a thermal insulation layer and an outer coating of a facade thermal insulation board according to the present invention. Here, the facade insulation board is bonded to the facade of the building and fixed by a washer dowel, and functions as a mortar carrier board for external coating. Here, the washer dowel is disposed under the outer coating so as to sink to the surface layer of the facade insulation board, and the washer has a suitable diameter of less than 90 mm.

  Thus, according to the present invention, a more suitable composite heat insulation system having a rated heat conduction value λ <0.040 W / mK can be achieved by the facade heat insulation board of the present invention. In particular, the superior mechanical properties of the facade insulation board according to the present invention made it possible to employ fewer washer dowels than conventional facade systems. Further, according to the present invention, it is possible to construct a composite heat insulation system in which a washer dowel is sunk, for example, a heat conduction group 035 for the first time.

  Furthermore, according to the present invention, a washer dowel with an effective washer with a diameter of less than 90 mm could be sunk to achieve a composite thermal insulation system in a heat transfer group superior to WLG040. As a result, both labor and cost can be kept very low.

  Thus, according to the composite thermal insulation system of the present invention, on a painted facade that is visually identical to a prior art system having a washer with a diameter of 90 mm and a washer dowel satisfying λ ≦ 0.036 W / mK. The dowel pattern can be obtained by being incorporated into the same, and at the same time, the prior art thermal bridge can be avoided.

  The details of the composite insulation system according to the invention are described in the dependent claims 11 to 15.

  Thus, the preferred diameter of the washer is less than 70 mm, more preferably about 60 mm. Thereby, a labor can be further reduced with cost.

  Moreover, it is preferable that a facade heat insulation board contains the recessed part which sinks a dowel washer in the contact area | region of a dowel washer. In this case, the washer dowel may be sunk into the facade thermal insulation board by approved means, in which case it does not damage the fiber structure in the area adjacent to the sinking part.

  Alternatively, a cut may be made in the contact area of the dowel washer on the facade insulation board. The shape of the notch essentially matches the contour of the dowel washer, and in this region the dowel washer is sunk into the facade insulation board. Here, it was found that it is not always necessary to remove the mineral fiber material in the region where the washer dowel is submerged, and the remaining mineral fiber material may be suitably used for further strength improvement and system stabilization. . Aggregation between the mineral wool structure covered by the dowel washer and the adjacent area is eliminated by the incision, but at the same time, the washer dowel is tightened to compress the mineral fiber material present in this area, which further increases the dowel tightening force. Work to support. Thus, the washer dowel has a particularly stable pedestal in the facade insulation board, thereby being more firmly bonded to the facade. In addition, due to the synergistic effect with the layer having a high binder amount in the facade insulation board according to the present invention, the compressed mineral wool material under the Dowel washer exhibits a further excellent effect, thereby further stabilizing the system. Was found to be obtained.

  The depth of the cut is made smaller than the thickness of the surface layer, and the thickness of the surface layer remaining after making the cut is set to at least 5%, at least 10%, and at least 20% of the total thickness of the surface layer. preferable. Through the remaining film thickness, load distribution to the adjacent regions in the surface layer is preferably performed. This further improves the stability of the composite insulation system according to the present invention.

If the settled dowel washer is plugged with a plug, a substantially continuous surface will continue to the outside of the thermal insulation layer. Here, the plug is more preferably made of mineral wool material,
In this case, a single material continues continuously over the outside of the heat insulating layer. This eliminates the need for a thermal bridge and makes the washer dowel position on the facade less noticeable over time.

  According to another aspect of the present invention (according to claim 16), the step of producing a first mineral wool nonwoven mat having an uncured binder and a layered fiber orientation is compared with the first mineral wool nonwoven mat. Forming a second mineral wool nonwoven mat having higher mechanical strength, and joining the first mineral wool nonwoven mat and the second mineral wool nonwoven mat so as to form a nonwoven mat web. A method of manufacturing a facade insulation board, comprising: a nonwoven fabric so that a region of a boundary layer between the first mineral wool nonwoven mat and the second mineral wool nonwoven mat has a higher binder amount than other regions Adjust the binder distribution in the mat, further separate the binder curing process and the cured mineral wool nonwoven mat To provide a method for manufacturing a facade insulation board and a step of separating the plurality of the insulation board by the process.

  Mineral wool nonwoven mat with higher mechanical strength compared to the first mineral wool nonwoven mat is after curing or final as described below compared to the layer formed by the first mineral wool nonwoven mat Refers to a mineral wool nonwoven mat having a higher mechanical strength.

  By this method, the facade according to the present invention can be generated in a particularly suitable manner. Furthermore, it is essentially possible to reuse conventional production equipment, which can keep the production costs of the facade insulation board according to the invention low. Adjustment of the binder distribution according to the present invention requires the application of process parameters, which can be done with little complexity.

  Details of the method according to the invention are described in the dependent claims 17-23.

  The process of creating a second mineral wool nonwoven mat is established to form a layered mineral wool containing an uncured binder and to form a second mineral wool nonwoven mat with a three-dimensional isotropic fiber orientation. Recombining the mineral wool. Thereby, a 2nd mineral wool nonwoven fabric mat can also be manufactured reliably suppressing cost. Since a technique that serves this purpose is described in DE 103 59 902 Al, a further detailed description thereof is omitted.

  Alternatively, the step of creating the second mineral wool nonwoven mat is a surface layer containing a hardened binder of upset mineral wool, in particular, a three-dimensional upset mineral wool nonwoven mat, or a mineral wool having a layered fiber structure and high bulk density. Including the step of incorporating into

  Furthermore, when creating a mineral wool nonwoven mat, it is possible to form the main nonwoven mat in a fiberizing section equipped with several fiberizers, where the binder is contained in the main nonwoven mat at a higher concentration than other areas. The main nonwoven fabric mat is the first mineral wool nonwoven mat and the second mineral wool nonwoven fabric so that a region having a high binder concentration is added to the predetermined region of the first mineral wool nonwoven mat and the peripheral layer of the first mineral wool nonwoven fabric mat. Separate into mats. In this way, the desired binder distribution is made easier with only one fiberizing section in one production facility. This realizes cost reduction and ensures process safety.

Alternatively, it is also possible to form the first mineral wool nonwoven mat and the second mineral wool nonwoven mat in different fiberized portions, in which case the binder is added at a higher concentration in the marginal layer than other regions. Add to mineral wool nonwoven mat. Thereby, the final desired binder concentration in the present invention can be easily obtained in terms of the process and the apparatus.

  Moreover, it is more preferable to add a binder to the main surfaces facing each other before bonding the first mineral wool nonwoven fabric mat and / or the second mineral wool nonwoven fabric mat. In order to set the desired binder concentration in the present invention, the binder may be added not only before the bonding but also after the bonding, and a preferable process technique is selected at any time to adjust the binder concentration in the boundary layer region between the surface layer and the bottom layer. Is done.

  Furthermore, it is possible to add a greater amount of binder to the second mineral wool nonwoven mat than to the first mineral wool nonwoven mat, which can be achieved more simply from a process technology point of view.

  Further, the fibers in the second mineral wool nonwoven mat may be formed with an average diameter larger than that of the first mineral wool nonwoven mat. Thus, it became easy to change the fiber diameter by a known means from the viewpoint of process technology, and finally, the desirable properties of excellent mineral wool material could be obtained.

  Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view illustrating a composite heat insulation system according to the present invention. FIG. 2 is a diagram illustrating binder distribution in a facade insulation board according to the present invention.

  According to FIG. 1, the composite insulation system 1 attached to the facade 2 comprises an adhesive mortar 3, whereby the insulation layer formed by the facade insulation board 4 is bonded to the facade 2 in a single spot welding. Furthermore, the composite thermal insulation system 1 includes an outer coating 5. As shown in FIG. 1, the facade insulation board 4 is further supported on the facade 2 by a washer dowel 6. Here, the washer dowel 6 is disposed so as to sink to the facade heat insulating board 4, and the gap between the washer dowel 6 and the outer coating 5 is closed by the plug 7.

  According to this embodiment, the composite thermal insulation system 1 is employed for refurbishing old buildings. Here, the facade 2 includes the outer wall 21 together with the old mortar coat 22, and forms a planar substrate for the composite heat insulation system 1 having excellent support capability. Further, a dowel hole 23 in which the washer dowel 6 is fixed is formed in the facade 2 by a known method.

  The washer dowel 6 includes a washer 61 having a diameter of 60 mm in this embodiment. The washer 61 is integrally formed with the dowel shaft portion 62 and extends over the facade heat insulation board 4 and cooperates with the dowel bolt 63 to fix the heat insulation board 4 to the facade 2.

  The outer coating 5 includes a first coat 51 in which a reinforcing mat 52 is embedded. A final coat 53 is further applied to the outside of the first coat 51.

  As shown in more detail in FIG. 1, the facade insulation board 4 comprises a bottom layer 41 together with a surface layer 42, which in the present embodiment are integrally formed. Then, a mineral wool nonwoven fabric mat containing an uncured binder is applied to each surface layer and adhesively cured in a heat treatment furnace. Here, the bottom layer 41 has a layered fiber orientation. That is, most of the mineral fibers are oriented almost parallel to the wide area of the bottom layer 41.

  On the other hand, the surface layer 42 includes three-dimensional isotropic fiber-oriented mineral wool. That is, the fibers contained in this layer are oriented in the three-dimensional spatial dimension at approximately the same ratio.

  Further, as shown in FIG. 1, the facade insulation board 4 leaves a residual thickness of the surface layer 42 that reaches about 15% of the total thickness of the raw layer, and the surface layer 42 from the mortar carrier side of the surface layer 42 by the dimension T. A notch 43 projecting toward the center is included. In this embodiment, the cut 43 is formed by a punching machine with the mineral wool material inside the cut so that the mineral wool is not peeled off. As shown in FIG. 1, the dowel washer 61 compresses this mineral wool material in the process of fixing the facade heat insulation board 4 to the facade 2.

  In the facade heat insulating board 4, the bottom layer 41 includes an edge layer 41 a that exists in the main surface region of the bottom layer 41 that faces the surface layer 42. The boundary layer between the bottom layer 41 and the surface layer 42 is indicated by a broken line for clarity.

  In particular, as shown in FIG. 2, the edge layer 41 a has a higher binder amount than other regions of the facade heat insulating board 4. In this embodiment, the binder amount in the surface layer is set to about 5%. While the amount of binder in the bottom layer is in the range of about 3.7% over a large area, in this example it is increased to be greater than 6% in the marginal layer. The increased binder in the region of the marginal layer due to the conditions inherent in the process penetrates into the marginal region of the surface layer 42 in the process of producing the facade insulation board 4, and the surface layer and bottom layer shown by the broken lines in FIG. It penetrates into the surface layer itself near the boundary layer.

  In cooperation with the material of the surface layer 42, which has inherently high support capacity, in particular with the compressed mineral wool material under the dowel washer 61, this marginal layer 41a with increased binder is combined with the composite insulation system. It becomes a heat insulation layer in 1, and it is possible to reliably absorb the stress at the time of fixation and to reliably transmit the load to a portion adjacent to the washer dowel 6. Thereby, a favorable effect is exhibited in the stability of each of the facade heat insulation board 4 and the composite heat insulation system 1.

  The facade heat insulating board 4 may be formed by a fiberizing part such as a spraying device in which ten spray nozzles are continuously arranged. In this embodiment, the mineral wool of the bottom layer 41 is formed by six of these spray nozzles, the surface layer 42 is formed by the four spray nozzles at the bottom, and in the region of the six spray nozzles with respect to the bottom layer 41, More binder is added than in other areas. The main nonwoven fabric mat having a layered fiber orientation formed in this way has the first mineral wool nonwoven fabric mat and the first mineral wool nonwoven fabric mat so that a region having a higher binder concentration exists in the edge layer of the first mineral wool nonwoven fabric mat. Separated into two mineral wool nonwoven mats. Furthermore, a second mineral wool nonwoven mat is established and recombined to have a so-called isotropic fiber orientation. These non-woven mats are bonded so that the edge layers having a high binder amount are present in the bonded non-woven mat. After the binder is cured, the facade heat insulating board 4 including the surface layer 42 formed by the second mineral wool nonwoven mat and the bottom layer 41 formed by the first mineral wool nonwoven mat is formed through this cutting step. Also good.

In this embodiment, the facade heat insulation board 4 has a total thickness of 100 mm with a surface layer 42 of about 40 mm and a bottom layer 41 of about 60 mm. In this embodiment, the edge layer 41a has a thickness of about 10 mm. The predetermined binder amount shown in FIG. 2 is an average binder amount of about 4.5% of the entire facade insulation board 4. In this embodiment, the bulk density of the surface layer 42 is about 120 kg / m ³ and the bulk density of the bottom layer 41 is about 100 kg / m ³ . Thus, the facade heat insulation board 4 achieved a rated heat conduction value λ of about 0.035 W / mK according to DIN EN 13162.

  In addition to the embodiments described above, the present invention allows for further variations.

  That is, the facade heat insulation board 4 may further include the following parameters.

The surface layer is provided as a three-dimensional upsetting mineral wool having a bulk density of about 130 kg / m ³ according to the technology of DE 198 60 040 Al, a binder content of about 4% and a film thickness of about 60 mm. A bottom layer having a thickness of about 140 mm has a bulk density of about 100 kg / m ³ and a binder content of about 3.5%. And by adjusting the binder amount of the boundary layer to about 5%, a facade heat insulating element according to the present invention having an average binder amount of about 3.9% was obtained.

According to a third embodiment of the invention, the surface layer is provided in the form of a layered mineral wool layer having a high bulk density of about 200 kg / m ³ , a binder amount of about 4% and a film thickness of about 50 mm. A bottom layer having a thickness of about 110 mm has a bulk density of about 100 kg / m ³ and a binder content of about 3.5%. And by adjusting the binder amount of the boundary layer to about 5%, a facade heat insulating element according to the present invention having an average binder amount of about 3.8% was obtained.

  Alternatively, these two modifications may be created by bonding a hardened layer having predetermined parameters. Or you may supply the surface layer after hardening to a hardening process with a non-hardened layered bottom layer.

  Furthermore, from a structural point of view, it is not always necessary that a region having a high binder amount be present in the edge layer of the bottom layer 41. In the manufacturing process, it is possible to provide a high binder amount directly in the part of the boundary layer between the two layers by further spraying the binder onto the main surface of the bottom layer 41 and / or the surface layer 42, and of course However, the binder will penetrate to some extent on the surface of these two layers.

  Furthermore, the average binder amount of the surface layer 42 is not necessarily higher than the average binder amount of the bottom layer 41. These binder amounts may rather be approximately equal. Here, the binder amount in the entire cross section of the facade heat insulating board can be adjusted to be equivalent to the case where the edge layer 41a is removed.

  According to the present invention, the fibers of the surface layer 42 are formed with a larger diameter than the fibers of the bottom layer 41, but this is not necessarily so. Rather, it is possible to use identically configured fibers.

  As a material for the facade heat insulating board 4, rock wool is used in the embodiment, but the bottom layer 41 and / or the surface layer 42 may be formed of glass wool.

  Furthermore, the ratio of the film thickness of the bottom layer 41 to the surface layer 42 is not limited to the predetermined ratio 60:40, and can be changed in any way depending on the application.

As described in detail above, the present invention is particularly useful for building structures that are formed of bonded mineral wool as a component of a composite thermal insulation system and satisfy a rated thermal conductivity value λ <0.040 W / mK according to DIN EN 13162. The first facade insulation board for insulation of the outer facade was provided. This facade insulation board comprises a bottom layer and a surface layer. The bottom layer is formed of layered mineral wool, and the surface layer includes mineral wool having higher mechanical strength than the bottom layer. Here, for the first time, the binder amount was successfully set higher in the boundary layer region between the surface layer and the layered bottom layer than in the other regions. Furthermore, the present invention provided a composite insulation system including such a novel facade insulation board. And this invention specified the manufacturing method of such a facade heat insulation board.

Claims (23)

  In particular, a facade insulation board (4) for insulation of the outer facade (2) of a building as a component of a composite insulation system (1), which is formed of bonded mineral wool and has a rated heat conduction value λ according to DIN EN 13162 <0.040 W / mK is satisfied, a bottom layer (41) and a surface layer (42) are provided, the bottom layer (41) is formed of layered mineral wool, and the surface layer (42) has higher mechanical strength than the bottom layer. A facade insulation board (4) comprising mineral wool, wherein the amount of binder in the region of the boundary layer between the surface layer (42) and the bottom layer (41) is higher than the amount of binder in the other regions.   It is a facade heat insulation board of Claim 1, Comprising: The surface layer contains the mineral wool of a three-dimensional isotropic fiber orientation, The facade heat insulation board characterized by the above-mentioned. The facade heat insulation board according to claim 1, wherein the surface layer is formed of upsetting mineral wool . The facade heat insulation board according to claim 1, wherein the surface layer is made of layered mineral wool having a high bulk density of 180 kg / m ³ .   It is a facade heat insulation board in any one of Claims 1-4, Comprising: The area | region which has a high amount of binders is an edge layer (41a) of the layered bottom layer (41) which opposes a surface layer (42) fundamentally. A facade insulation board characterized by including.   6. The facade heat insulation board according to claim 1, wherein an average binder amount of the surface layer (42) is higher than an average binder amount of the layered bottom layer (41).   7. A facade insulation board according to any one of the preceding claims, characterized in that the fibers in the surface layer (42) have a larger average diameter than the fibers in the layered bottom layer (41).   It is a facade heat insulation board in any one of Claims 1-7, Comprising: A layered bottom layer (41) is formed with a film thickness larger than a surface layer (42), The facade heat insulation board characterized by the above-mentioned. It is a facade heat insulation board in any one of Claims 1-8, Comprising: The rated heat conduction value (lambda) <= 0.036W / mK based on DIN EN 13162 is satisfy | filled . A composite thermal insulation system (1) for thermal insulation of an outer facade (2) of a building,
A heat-insulating layer and an outer coating (5) of the facade heat-insulating board (4) according to any one of claims 1 to 9,
The facade insulation board (4) is configured to be bonded to the building facade (2) and fixed by the washer dowel (6), and functions as a mortar carrier board for the outer coating (5),
A washer dowel (6) with a washer (61) having a suitable diameter of less than 90 mm is arranged under the outer coating (5) so as to sink into the surface layer (42) of the facade insulation board (4). A composite insulation system characterized by that. 11. A composite insulation system according to claim 10, characterized in that the preferred diameter of the washer (61) is 60 mm .   12. The composite insulation system according to claim 10 or 11, characterized in that the facade insulation board (4) comprises a recess for sinking the dowel washer (61) in the contact area of the dowel washer (61). Composite insulation system.   12. The composite insulation system according to claim 10 or 11, wherein the facade insulation board (4) has a notch (43) having a shape substantially corresponding to the contour of the dowel washer (61) in the contact area of the dowel washer (61). A composite insulation system, characterized in that a dowel washer (61) is arranged to sink into the facade insulation board (4) in this region. 14. The composite heat insulation system according to claim 13, wherein the depth (T) of the cut (43) is smaller than the film thickness of the surface layer (42), and the residual film of the surface layer (42) remaining in the cut (43). A composite thermal insulation system, characterized in that the thickness is at least 5% of the total thickness of the surface layer (42).   15. A composite thermal insulation system according to any one of claims 12 to 14, characterized in that the sunk dowel washer (61) is closed by a plug (7) made of a single mineral wool material. Insulation system. It is a manufacturing method of the facade heat insulation board (4) according to any one of claims 1 to 9,
Creating a first mineral wool nonwoven mat having a layered fiber orientation with an uncured binder;
Creating a second mineral wool nonwoven mat having high mechanical strength compared to the first mineral wool nonwoven mat;
Form the nonwoven fabric mat web by adjusting the binder distribution in the nonwoven fabric mat so that there is a higher amount of binder in the boundary layer region between the first mineral wool nonwoven fabric mat and the second mineral wool nonwoven fabric mat than in other regions Combining the first mineral wool nonwoven mat and the second mineral wool nonwoven mat,
Curing the binder;
And a step of separating the hardened mineral wool nonwoven fabric mat into a heat insulating board by a dividing step.   17. The method of claim 16, wherein the step of creating a second mineral wool nonwoven mat comprises opening a layered mineral wool containing an uncured binder followed by a second isotropic fiber orientation. A method comprising the step of combining established mineral wool to form mineral wool.   17. The method according to claim 16, wherein the step of creating the second mineral wool comprises upsetting mineral wool nonwoven mats, in particular three-dimensional upsetting mineral wool, or mineral wool having layered fiber orientation and high bulk density. , Including the step of incorporating into a surface layer comprising a cured binder. The method according to any one of claims 16 to 18, wherein the main nonwoven fabric mat is formed in a fiberizing section having several fiberizing devices to produce a mineral wool nonwoven mat, and has a higher concentration than other regions. A binder is added to a predetermined region in the main nonwoven fabric mat at the location of the first mineral wool so that a region having a higher binder concentration exists in the marginal layer of the first mineral wool nonwoven mat. Separating into a nonwoven fabric mat and a second mineral wool nonwoven fabric mat.   It is a method in any one of Claims 16-18, Comprising: A 1st mineral wool nonwoven fabric mat and a 2nd mineral wool nonwoven fabric mat are formed in a different fiberization part, and a binder in the location of a density | concentration higher than another area | region. Is added to the edge layer of the first mineral wool nonwoven mat.   21. The method according to any one of claims 16 to 20, wherein a binder is added to each of the first mineral wool nonwoven mat and / or the second mineral wool nonwoven mat or the cured surface layer before bonding them. And added to the major surface facing each web.   The method according to any one of claims 16 to 21, wherein a greater amount of binder is added to the second mineral wool nonwoven mat than to the first mineral wool nonwoven mat.   23. The method according to any of claims 16 to 22, wherein the fibers in the second mineral wool nonwoven mat are formed to have a larger average diameter than the fibers in the first mineral wool nonwoven mat. how to.

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