DE202004007543U1 - Waterproofing membrane for buildings - Google Patents

Abstract

Vapor-permeable and waterproof waterproofing membrane for the wall and / or roof area of buildings, containing an at least three-layer composite based on thermoplastic materials with an inner layer, an outer layer and a middle layer arranged between the inner layer and the outer layer, the inner layer being made of a porous substrate The middle layer is formed by a vapor-permeable but liquid-impermeable substrate and the outer layer by a vapor-permeable but liquid-impermeable embossed and perforated film with a three-dimensionally structured surface, and the inner layer, the middle layer and the outer layer are bonded to one another, characterized in that the outer layer is equipped with heat reflecting properties ,

Description

The invention relates to a vapor diffusion open and waterproof waterproofing membrane for the wall and / or roof area of buildings, containing an at least three-layer composite based on thermoplastic Plastics with an inner layer, an outer layer and one between the inner layer and the outer layer arranged middle layer, the inner layer of a porous substrate, the middle layer of a vapor-permeable but liquid-impermeable substrate and the outer layer of a breathable, but liquid impervious and perforated film with three-dimensional structured surface and the inner layer, the middle layer and the outer layer are firmly connected.

Find such waterproofing membranes in the roof area, for example, use as a so-called roof membrane, which are positioned below the roof covering.

Such sealing sheets are used in the wall area for wall covering, which is usually is referred to as "house wrapping".

Regardless of the use of the waterproofing membrane in the wall or roof area of buildings, the task is one such waterproofing membrane, high windproofness and water resistance or at least to have water-repellent properties, while on the other hand Water vapor from the building if possible unhindered to the outside should diffuse through the waterproofing membrane.

A generic waterproofing membrane is a vapor permeable and waterproof roofing membrane from the DE 101 16 477 A1 known. However, the known roofing membrane has only a low UV resistance, which leads to problems when it is directly exposed to strong sunlight, which cannot be avoided in applications in the wall or roof area of buildings. In addition, building roofs designed with conventional roofing membranes have the property of heating up very strongly in strong sunlight. The known waterproofing membranes used as roofing membranes therefore appear to be in need of improvement and, because of their existing disadvantages, have not been suitable for use in the wall area of buildings.

The object of the invention is therefore a vapor-permeable and waterproof sealing membrane for the wall and / or roof area of buildings propose which for the applications mentioned is equally well suited and the previous disadvantages of the prior art overcomes itself but also on an industrial scale Measurements on can be produced in a simple manner.

To solve this task, the Formation of a vapor diffusion-open and waterproof sealing membrane for the Wall and / or roof area of buildings according to the characteristics of the protection claim 1 suggested.

Advantageous configurations and Developments of the waterproofing membrane according to the invention are the subject of subclaims.

The solution according to the invention is that the outer layer the waterproofing membrane on its surface facing away from the middle layer is trained.

It has been within the scope of the invention shown that by such heat reflective equipment outer layer the waterproofing membrane according to the invention this on the one hand receives a significantly increased UV resistance, whereby even with longer ones Irradiation resistant to sunlight stays and therefore for diverse Suitable for sealing the wall or roof area of buildings.

In addition, it causes heat reflective equipment the outer layer a significantly increased heat radiation, So that the warming of the building due to incident sunlight which the waterproofing membrane according to the invention in the wall or roof area on the outside is appropriate, can be significantly reduced.

Since the inner layer of the waterproofing membrane according to the invention from a porous Substrate is formed, which allows steam passage and the middle layer of a vapor-permeable but liquid-impermeable substrate and also the outer layer from a breathable, but impervious to liquid and embossed perforated film with three-dimensional structured surface is, the waterproofing membrane according to the invention the desired Vapor permeability, but at the same time windproof and liquid impermeable on so they as a waterproofing membrane for various applications in the wall and / or roof area of buildings can be used.

The additional on the outer layer applied heat reflective equipment influences here Vapor permeability the outer layer in no way, nor does it impede liquid tightness and windproofness of the waterproofing membrane according to the invention in the area the outer layer.

So it is in the context of the invention for example possible a heat reflective Waterproofing membrane for to provide the sealing of the wall area of houses for so-called "house wrapping", the opposite a water column of at least 35 cm according to DIN-EN 20811 is water-repellent.

To form the heat reflecting finish of the outer layer of the invention There are various options available for the waterproofing membrane. Thus, according to a proposal of the invention, it is possible to apply metal vapor deposition to the surface of the outer layer facing away from the middle layer in order to provide the outer layer with heat reflecting properties. Such metal vapor deposition can be carried out with various suitable metals, for example with aluminum.

Alternatively, it is also possible to heat reflecting equipment the outer layer the waterproofing membrane according to the invention a heat reflective Print layer on the surface of the surface facing away from the middle layer outer layer to apply, this printing layer using the known methods is to be brought up.

In both of the aforementioned cases, i.e. H. either applying metal vapor deposition or applying one Print layer for the heat reflecting equipment of the outer layer it is preferred to apply the metal vapor deposition or pressure layer to the the outer layer to apply forming film before it structured its three-dimensional surface with embossing and receives perforations, so that the metal vapor deposition or pressure layer to form the heat reflecting equipment not the three-dimensional structured surface of the film again makes. Of course However, it is also conceivable for the metal vapor deposition or heat-reflecting printing layer only after the three-dimensional structuring of the outer layer to apply forming film, provided that this is the structuring of the Foil and its perforation not affected.

Furthermore, it is in one another embodiment the invention also possible into which the outer layer forming film in the production of heat-reflecting pigments bring in, e.g. B. by the extrusion of the film used in this Extruder already in addition to the thermoplastic serving as the base material Plastic to form the corresponding film forming the outer layer Pigments are mixed in, which is then the later outer layer the waterproofing membrane according to the invention forming film its heat reflective Impart property.

In each of the aforementioned cases it provided the waterproofing membrane according to the invention adhesive bonding of the first individually present substrates, which are the inner layer, the middle layer and the outer layer form, shape. This adhesive connection can if necessary with the help of adhesion promoters, such as EVA, e.g. B. in one Laminating device take place through which the individual layers of the composite substrates in the desired order be pulled through and under the influence of pressure and Heat-resistant be connected to each other. This can be particularly advantageous a laminating device referred to as a flat bed laminating device is used be encircling an elongated gap between two trained conveyor belts, through which the superimposed and the later inner layer, middle layer and outer layer forming substrates and under the influence of Pressure and warmth to the waterproofing membrane according to the invention get connected. Here, the outer layer is already in front of the Pass through the laminating device on the one hand with a three-dimensional structured surface provided, on the other hand already equipped with heat reflecting properties.

Can be used as an outer layer with particular advantage one embossed by vacuum and perforated film are provided on a surface thereof has protruding and grid-like embossed projections, the individual Embossing tabs in your each distal end region are perforated. Such Foil is for use in disposable hygiene items such as baby diapers, Surgical covers, disposable towels etc. is known, for which reference is made to WO 96/13979. In the manner according to the invention such a film becomes heat reflective before embossing and punching equipped.

For example, when training the heat reflecting equipment in the form of a metal vapor deposition or a printing layer that is on the surface of the outer layer facing away from the middle layer is applied, allows the afterthought three-dimensional structuring by means of vacuum, that the initially as a result the metal vapor deposition or printing vapor-impermeable film subsequently at the three-dimensional structuring in the distal End region of the individual embossing projections arranged Perforations are perforated to the extent that they are still and liquid tightness the desired vapor permeability receives as well as additionally increased strength.

The embossing projections on the surface of the outer layer facing away from the middle layer, so that the Outer layer on their accessible surface in addition to the heat reflective equipment over here too a three-dimensional embossed structure features, which gives it a certain roughness. As a result, when the sealing sheet according to the invention in the roof area, in particular, the handling is easier because of this rough side of the waterproofing membrane applied roof slats as a result of high surface friction too with certain sloping ceilings already automatically in their position remains, which significantly affects the work of the roofer simplified.

On the other hand, this roughness leads to the waterproofing membrane according to the invention increased liability especially when used in the wall area of buildings from the outside materials applied to the waterproofing membrane, e.g. B. Thermal insulation materials or plaster layers, which is extraordinary is advantageous.

The film forming the outer layer preferably has about 10 to 700 holes and corresponding embossing projections per cm ² , which gives it a high and desired vapor permeability with simultaneous liquid-tightness and wind-tightness.

The film forming the outer layer can preferably be based on polyolefins, such as polyethylene or polypropylene or a polyester, and with a basis weight of 10 to 100 g / m ² . In addition, it can also be produced from ethylene-n-butyl acrylates, ethylene methyl acrylate polymers, ethylene vinyl acetate, thermoplastic polyurethane elastomers, polyamide elastomers and other suitable thermoplastic plastics.

The middle layer of the waterproofing membrane according to the invention can advantageously be formed from a porous film based on a thermoplastic in a thickness of 10 to 50 μm, which contains inert inorganic solid particles with an average diameter of less than 100 μm as filler in an amount of at least 10% by weight. % based on the content of thermoplastic contains. Polycarbonates are particularly suitable as inert inorganic solid particles. Such a film forming the middle layer advantageously has a basis weight of 10 to 40 g / m ² .

This is preferred as an inert inorganic solid particle polycarbonate used can be, for example, calcium carbonate, contents of 25 to 55 wt .-% based on the plastic content the middle class are sufficient to achieve the desired Properties for the waterproofing membrane with regard to water vapor permeability and ensure watertightness. The inorganic inert particles preferably have a medium one Diameter less than 30 μm, preferably in the range from 0.05 to 20 μm. In the manufacture of the Film forming the middle layer is formed immediately adjacent to the inert inorganic solid particles in the transition area to the plastic material small breaks, which then create the desired pores in the film train and you to achieve the water vapor permeability Provide the necessary porosity while being watertight.

This breathable porous film, which forms the middle layer serves on the one hand as a water barrier layer and prevents the ingress of moisture due to e.g. B. Rain or flying snow from the outside of the building, allows but at the same time the passage of water vapor through the waterproofing membrane according to the invention, to the formation of condensation on the inside of the waterproofing membrane counteract.

Alternatively, it is also possible to use the Middle layer of the waterproofing membrane according to the invention Use of a perforated by means of punching or needles and / or stretching Manufacture film from thermoplastic. Here is preferably thought of forming a microporous film, that the microporosity the water vapor permeability allows however, watertightness is guaranteed is because the capillaries formed are so small that penetration of Water drops is repelled. It is also possible to maintain this porosity Middle layer forming film by suitable stretching after the To achieve extrusion of the same.

Finally, the middle layer of the waterproofing membrane according to the invention can also be formed from a fleece made from meltblown microfibers or a fleece made from continuous filaments with a basis weight of 10 to 100 g / m ² . Such nonwovens are inherently porous and therefore permeable to water vapor, but are usually waterproof and also windproof, which is extremely advantageous in the sense of the invention. If the pores present in the fleece to form the middle layer are not sufficiently permeable to water vapor, it is of course also possible for the fleece forming the middle layer to be additionally z. B. mechanically perforated by means of needles.

In addition, it is also possible that the nonwoven forming the middle layer by means of hydroentanglement to perforate, on the one hand due to the hydroentanglement very stable fleece for forming the middle layer is obtained, on the other hand this fleece has a large number of pores in regular or irregular arrangement in the form of perforations that have a diameter of about 0.1 to 2 mm and the individual neighboring perforations have a distance of 1 to 10 mm from each other.

Also the middle layer of the waterproofing membrane according to the invention is preferred based on a polyolefin, such as polyethylene, polypropylene or a polyester.

If a particularly high level of water resistance is required, as is the case, for example, with the wall cladding of buildings with the waterproofing membrane according to the invention is demanded exists about it also the possibility the middle layer by means of water repellents z. B. based on Fluorocarbons such as block copolymers a perfluoroalkyl acrylate or fluorocarbons, the trifluoromethylsinyl groups instead of the perfluoroalkyl groups, to make them hydrophobic.

The inner layer of the sealing membrane according to the invention can be formed, for example, by a porous film which corresponds to the film forming the outer layer, which results in a particularly economical construction, since two films of the same structure can be used here for the outer and inner layers of the sealing membrane according to the invention. Preferably, both in the outer layer and in the inner layer, the embossing projections are each formed on the accessible surface of the respective layer, ie on the side facing away from the middle layer, so that the sealing membrane has rough and three-dimensionally structured surfaces on both sides, which significantly simplifies the handling and laying or fastening of the sealing membrane according to the invention due to the static friction achieved in the area of the surface.

In this embodiment is beyond not just on the outside the outer layer a heat reflective equipment as explained above provided that the improved UV resistance and reflection of thermal radiation from the outside serves. Rather, the one forming the inner layer is correspondingly Foil on its side facing away from the middle layer made heat reflective, so that the thus in the field of foreign and inner layer of heat-reflective waterproofing membrane shows a particularly high insulation effect. The heat reflecting equipment of the The inner layer prevents heat loss from the building into the building Environment at z. B. low outside temperatures in front.

It goes without saying that for training the heat reflective equipment the same alternatives (metal vapor deposition, printing, heat reflecting Pigments in the raw material) are open, as they have been before for the outer layer have been described.

Alternatively, it is also possible to form the inner layer from a fleece of continuous filaments with a basis weight of 10 to 100 g / m ² , preferably 20 to 80 g / m ^2, based on polyolefins, such as polyethylene or polypropylene or a polyester. In the waterproofing membrane according to the invention, the inner layer primarily takes on the function of a stable carrier sheet and gives the waterproofing membrane high mechanical strength.

As a result, it is also possible to Inner layer of a scrim, grid, knitted fabric, needle punch or woven fabric based on polyolefins, such as polyethylene or polypropylene or of a polyester.

To ensure that the sealing sheet according to the invention is to ensure it moreover preferred, if possible all layers of the waterproofing membrane according to the invention form from the same polyolefin or a polyester, so that a unmixed waterproofing membrane is obtained.

Finally, if necessary, at least one of the layers of the waterproofing membrane according to the invention is flame-retardant equipped become. This can be done, for example, by using suitable additives Cause flame retardancy, in a manner known per se become.

The sealing membrane according to the invention described above can be produced by the known processes in which the individual layers first be produced separately, then under the action of pressure and Heat and possibly using arranged between the individual layers Adhesion promoters are bonded together. For example be provided, the individual foils, nonwovens or other substrates, which form the respective layers, each separately as a roll supply and then in a smooth calender or a laminating device, for example a flat bed laminating device or others suitable devices to form the waterproofing membrane to bond at least three layers of adhesive together. In any case, it is advantageous if the outer layer forming film and, if necessary, the corresponding film for training the inner layer even before introducing its three-dimensional textured surface desired heat reflective equipment receives. In the case where the outer layer and if necessary Heat-reflecting film forming the inner layer Contains pigments, this results in heat reflective equipment already immediately with the production of the film which later forms the outer layer, while with the alternative metal vapor deposition or heat reflecting Printing these operations for Training the heat reflective equipment the film preferably before the three-dimensional structuring is applied exerted on the slide becomes.

In addition to connecting the individual Substrates containing the layers of the waterproofing membrane according to the invention train, in a calender or a lamination it also possible the individually fed Layers by gluing z. B. with modified hot melt adhesives to bond with each other on a polyurethane basis.

The invention is described below of an embodiment explained in more detail in the drawing. Show it:

1 the structure of a waterproofing membrane according to the invention in a perspective schematic representation,

2 2 shows a section through the waterproofing membrane according to the invention,

3 an enlarged view of the waterproofing membrane according to detail X in 2 .

4 supervision of the outer layer according to arrow V in 3 .

5 a further embodiment of the invention.

In the 1 and 2 is a waterproofing membrane 1 shown, which can be used, for example, for sealing a building in the wall and / or roof area by applying it to the battens of a roof structure below the roof covering or to the walls of a building.

The waterproofing membrane 1 is made of a three-layer composite of layers 10 . 11 . 12 formed with an inner layer 10 facing the building while an outer layer 12 the forms the outside of the building. Between the inner layer 10 and the outer layer 12 is also a middle class 11 arranged, taking all three layers 10 . 11 . 12 are firmly connected.

Furthermore, the sealing membrane faces away from the middle layer and the outer surface 1 forming surface of the outer layer 12 heat reflecting equipment in the form of metal vapor deposition 13 applied, which is reflective to heat radiation, for example in the infrared range. Such metal vapor deposition can be produced, for example, by vapor deposition with aluminum.

Alternatively, the outside surface of the outer layer 12 also with a heat reflective print, e.g. B. be provided with a silver-colored print or the outer layer 12 contain heat reflective pigments that give it heat reflective finish and property.

The waterproofing membrane 1 with its three-layer composite of inner layer 10 , Middle class 11 and roof outside layer 12 with heat reflecting equipment e.g. B. in the form of metal vapor deposition 13 is also designed to allow vapor diffusion through the individual layers 10 . 11 . 12 through, so that, for example, water vapor accumulating inside the building, starting from the inner layer 10 across the middle class 11 and the outer layer 12 can be discharged through to the outside of the building, but at the same time is designed to be watertight, so that rain or snow from the outside of the building does not pass through the sealing membrane 1 can get inside the building.

For this purpose, the inner layer 10 formed from a corresponding porous substrate, for example from a nonwoven made of continuous filaments based on polyethylene or polypropylene and has a weight per unit area of 70 g / m ² .

The middle layer connected to this on one side is made, for example, of a hydrophobically finished nonwoven made of melt-blown microfibers with a basis weight of 10 to 100 g / m ² , which is microporous, ie water vapor permeable but watertight and is also based on polyethylene or polypropylene.

The outer layer 12 the waterproofing membrane 1 is made of an embossed and perforated film, which in more detail also from the 3 can be seen.

The outer layer 12 is with the middle class 11 connected along a surface, e.g. B. by lamination while on the other surface, that of the middle class 11 is facing away, forms the outside surface of the composite on which the heat reflecting equipment z. B. in the form of metal vapor deposition 13 is applied.

As evidenced by supervision 4 is the heat reflecting metal vapor deposition 13 load-bearing outer layer 12 with a large number of embossed projections arranged uniformly and in a grid pattern in lines running at right angles to one another 122 trained according to the cross section 3 considered approximately pot-shaped or cup-shaped. The respective over the middle class 11 connected flat areas 120 of the outer layer 12 protruding film projecting distal end regions 123 every embossing tab 122 have a central perforation or perforation 124 on, the passage cross-section is selected so that a water vapor permeability is given while being watertight. The embossing pattern, ie the arrangement of the individual embossing projections, is approximately waffle-shaped and uniform over the entire surface of the outer layer 12 educated.

Such a film can be for example by embossing and punching using vacuum according to one produce the method described in WO 96/13979.

This means that the cup-shaped embossing projections introduced into the film by means of vacuum 122 which of the outer layer 12 lend their desired three-dimensional embossed structure and in the distal end areas 123 every embossing tab 122 perforations 124 not through the outside on the outside layer 12 applied heat reflecting equipment in the form of metal vapor deposition 13 are subsequently destroyed, a flat film is preferred, which is the subsequent outer layer 12 forms, first on one of their surfaces with the heat reflecting equipment z. B. provided in the form of heat reflecting metal vapor deposition and subsequently subjected to the metal vapor-coated film of the embossing and perforation. The same also applies with advantage if the heat-reflective finish of the outer layer 12 by applying a heat-reflective print on an outside of the outer layer 12 forming film is applied. In this case too, the still undeformed film is first given a heat-reflecting finish before it is subsequently embossed and punched three-dimensionally.

One such is the outer layer 12 In addition to its vapor permeability and watertightness, the forming film is distinguished by the fact that on each embossing projection 122 which also acts as a three-dimensional prominence on the surface 120 can be viewed a variety of microprotuberances due to the above, the perforation or perforation 124 surrounding material web are formed, in the distal end region of each embossing projection 122 ,

The so trained and the outer layer 12 forming film is arranged so that the embossing projections 122 on the middle class 11 facing surface of the outer layer 12 out are formed, and then the heat reflecting equipment in the form of metal vapor deposition 13 is formed, which is then the outside surface of the waterproofing membrane 1 form. As a result of the arrangement of the embossing projections 122 on the middle class 11 facing surface of the outer layer 12 receives the waterproofing membrane 1 high roughness in the area of its outside surface.

As a result of the heat-reflecting metal vapor deposition applied as the outside coating, the sealing membrane explained above is 1 extraordinarily UV-resistant, even if it is exposed to unhindered access to UV light, such as sunshine, for long periods.

In addition, it has a high insulating effect due to its heat-reflecting property, so that when a building is equipped in the roof or wall area with such a sealing membrane 1 a heating of the building, for example due to solar radiation, can be effectively counteracted.

Finally, this heat reflective finish increases the waterproofing membrane 1 also the insulation effect of the waterproofing membrane 1 with cold outside temperatures, when it comes to releasing as little heat as possible from inside the building to the surroundings.

To further increase the insulating effect of the waterproofing membrane 1 can also be used an embodiment, as shown schematically in the 5 is shown.

Here are the outer layer 12 and the middle class 11 unchanged from the embodiment in the 1 to 3 formed, ie the outer layer 12 is formed by a three-dimensionally deformed and perforated film in vacuum, whose embossing projections 122 on the middle class 11 opposite side are formed and then heat reflective equipment such. B. in the form of metal vapor deposition 13 is applied.

Deviating from the embodiment in 3 is with the in the 5 illustrated embodiment, the inner layer 10 not formed from a flat substrate, for example a fleece, but rather analogously to the outer layer 12 also from an embossed and perforated film, ideally from an identical to the outer layer 12 trained film produced. Here, the z. B. embossed projections generated by vacuum deformation 122 with the perforations or perforations 124 on the inside layer 11 opposite side is formed and in turn on this is the inside of the waterproofing membrane 1 forming surface a heat reflecting equipment such. B. in the form of metal vapor deposition 13 applied. In this respect, the inner layer 10 a mirror-image arrangement to the outer layer 12 , mirrored to that of the middle class 11 spanned level.

One according to that 5 trained waterproofing membrane 1 is both on the outside and on the inside as a result of the embossing projections 122 trained with a high roughness, which has advantages when laying.

In addition, both the outside of the outer layer 12 as well as the inside of the inner layer 10 heat reflective z. B. with a metal vapor deposition 13 equipped. During, as described above, the metal vapor deposition 13 the outer layer 12 the increase in the UV resistance of the waterproofing membrane 1 and the reflection of heat radiation z. B. serves as a result of high solar radiation, increases the metal vapor deposition 13 on the inside of the inner layer 10 the insulating effect of the waterproofing membrane 1 by applying heat from inside the building to a passage through the waterproofing membrane 1 is prevented from the outside due to reflection, so that heat loss from the building to the outside z. B. is effectively prevented at low outside temperatures.

There is also the embossed and perforated foils to form the inner layer 10 and outer layer 12 as a result of the perforations or perforations 124 vapor-permeable but watertight, the desired water vapor permeability of the waterproofing membrane 1 guaranteed at the same time high water resistance. The one between the outer layer 12 and the inner layer 10 arranged middle class 11 serves as a membrane, promotes watertightness and water vapor permeability, but offers reliable protection against excessive wind pressure and thus gives the waterproofing membrane 1 also the desired windproofness.

The invention is hereinafter in further details explained using two examples.

Example 1:

To form a waterproofing membrane for the roof area of a building, preferably in the form of a roofing membrane, the following formation of the individual layers was used. The inner layer was made of a polypropylene nonwoven from continuous filaments with a basis weight of 50 g / m ² . The middle layer consisted of a porous film likewise made of polypropylene with a thickness of 30 μm, into which a polycarbonate with an average diameter of less than 100 μm was incorporated as a filler in an amount of 65% by weight based on the polypropylene content , The outer layer was also formed from a film based on polypropylene with a weight per unit area of 100 g / m ² , which in a first step was provided with aluminum evaporation in a thickness of 0.05 μm on a surface for heat-reflective finishing. In a second step it became one-sided Metal-vapor-coated film was embossed and punched in a vacuum by known methods, as a result of which it was given a three-dimensional structure and a porosity on the side carrying the metal vaporization, so that water vapor permeability was provided while at the same time being watertight.

The individual layers produced in this way were subsequently in a flat bed laminating facility with the help of adhesion promoters based on ethylene vinyl alcohol (EVA) a composite forming the waterproofing membrane adhered together.

The waterproofing membrane thus produced according to Example 1 was for a period of 1 year of intense sun exposure on her the heat reflective equipment exposed side, but there is no impairment the waterproofing membrane showed.

Example 2:

To form a waterproofing membrane for the wall area of buildings, as is desirable for so-called "house wrapping", a waterproofing membrane consisting of a polypropylene spunbonded nonwoven with a basis weight of 70 g / m ² as the inner layer, a hydrophobically treated meltblown nonwoven based on meltblown polypropylene microfibers with a basis weight of 18 g / m ² as the middle layer and an outer layer according to Example 1. This waterproofing membrane had a water resistance of at least 35 cm water column according to DIN-EN 20811, at the same time water vapor permeability and high wind resistance and survived several weeks of solar radiation on which the heat reflecting Equipment showing outside without impairing their function.

Claims (19)

Vapor-permeable and waterproof sealing membrane for the wall and / or roof area of buildings, containing an at least three-layer composite based on thermoplastic materials with an inner layer, an outer layer and a middle layer arranged between the inner layer and the outer layer, the inner layer being made of a porous substrate The middle layer is formed by a vapor-permeable but liquid-impermeable substrate and the outer layer by a vapor-permeable but liquid-impermeable embossed and perforated film with a three-dimensionally structured surface, and the inner layer, the middle layer and the outer layer are bonded to one another, characterized in that the outer layer is heat-reflecting , Sealing membrane according to claim 1, characterized in that for heat reflecting equipment the outer layer metal vapor deposition on the surface of the outer layer facing away from the middle layer is applied. Sealing membrane according to claim 1, characterized in that for heat reflecting equipment the outer layer a heat reflective print layer is applied to the surface of the outer layer facing away from the middle layer. Sealing membrane according to claim 1, characterized in that in the the outer layer forming film heat reflective Pigments are introduced. Sealing membrane according to one of Claims 1 to 4, characterized in that a film embossed and perforated by means of a vacuum is provided as the outer layer, the film on its surface facing away from the middle layer ( 120 ) protruding and grid-like embossing projections ( 122 ) and the embossing projections ( 122 ) in its distal end area ( 123 ) are perforated. Sealing membrane according to one of claims 1 to 5, characterized in that the outer layer ( 12 ) Has 10 to 700 holes / cm ² . Sealing membrane according to one of claims 1 to 6, characterized in that the outer layer ( 12 ) forming film based on polyolefins, such as polyethylene or polypropylene or a polyester and with a basis weight of 10 to 100 g / m ^{2 is} formed. Sealing membrane according to one of claims 1 to 7, characterized in that the middle layer ( 11 ) is formed from a porous film based on a thermoplastic in a thickness of 10 to 50 microns, the inert inorganic solid particles with an average diameter less than 100 microns as a filler in an amount of at least 10 wt .-% based on the content of thermoplastic Contains plastic. Sealing membrane according to one of claims 1 to 7, characterized in that the middle layer ( 11 ) is formed from a film made of thermoplastic material perforated by means of holes or needles and / or stretching. Sealing membrane according to one of claims 1 to 7, characterized in that the middle layer ( 11 ) is formed from a fleece made of melt-blown microfibers or from a fleece made from continuous filaments with a weight per unit area of 10 to 100 g / m ² . Sealing membrane according to claim 10, characterized characterized that the middle class ( 11 ) forming fleece is perforated. Sealing membrane according to one of claims 10 or 11, characterized in that the middle layer ( 11 ) forming fleece is perforated by means of hydroentangling and has perforations with a diameter of 0.1 to 2 mm in a regular or irregular arrangement and the individual neighboring perforations are spaced from 1 to 10 μm apart. Sealing membrane according to one of claims 1 to 12, characterized in that the middle layer ( 11 ) based on a polyolefin, such as polyethylene or polypropylene or a polyester. Sealing membrane according to one of claims 1 to 13, characterized in that the middle layer ( 11 ) is rendered hydrophobic by means of hydrophobizing agents based on fluorocarbons, such as block copolymers of a perfluoroalkyl acrylate or fluorocarbons, which contain trifluoromethylsilyl groups instead of the perfluoroalkyl groups. Sealing membrane according to one of claims 1 to 14, characterized in that the inner layer ( 10 ) is formed by a porous film which covers the outer layer ( 12 ) corresponds to the film. Sealing membrane according to claim 15, characterized in that the inner layer ( 10 ) analogous to the outer layer ( 12 ) is equipped to reflect heat. Sealing membrane according to one of claims 1 to 14, characterized in that the inner layer ( 10 ) is formed from a fleece of continuous filaments with a basis weight of 10 to 100 g / m ² , preferably 20 to 80 g / m ^2, based on polyolefins, such as polyethylene or polypropylene or a polyester. Sealing membrane according to one of claims 1 to 14, characterized in that the inner layer ( 10 ) is formed from a scrim, grid, knitted fabric, needle fleece or ribbon fabric based on polyolefins, such as polyethylene or polypropylene or a polyester. Sealing membrane according to one of claims 1 to 18, characterized in that at least one of the layers ( 10 . 11 . 12 ) is flame retardant.