EP2753767B1 - Laminar sealing tape - Google Patents

Description

The invention relates to a sheet-like sealing strip for sealing a wall construction area, for example for covering the transition region of a frame component or masonry area and an adjacent region of the wall structure, wherein the sealing strip has two longitudinal edges and distributed in the band longitudinal direction provided with an adhesive or providable by means of which the sealing strip can be adhered to a component, wherein the sealing strip has a strip extending in the strip longitudinal direction of a stretchable and tear-resistant material (first material).

Such sealing tapes are known in particular for wall sealing in the region of a frame component, adjacent to the frame component often a layer of insulating material is arranged, for example, a thermal insulation material such as a glass or mineral wool mat, foam mat or the like, and the transition region between the frame member and insulation material or with the Insulating material filled area between supporting structure and exterior wall construction / facade is to seal. By means of the insulating material, a highly thermally insulated building area is provided, in particular in relation to today's thermal insulation requirements of buildings. The frame member may in this case a window or door frame or another part represent a frame construction. By the sealing strip, a seal against external environmental influences can be achieved, in particular a driving rain, airtightness and the like. Furthermore, this area of the seal should be UV-resistant, as it may be exposed to the completion of the respective building or even beyond sun exposure. Furthermore, the sealing tape should be able to compensate for changes in position of the first and the second region of the building wall against each other, so that the sealing strip should consist of a stretchable and tear-resistant material. In this case, the sealing strip generally extends from an area outside the room, which can be arranged, for example, on the lining component or fixed thereto, to an area inside the room which, for example, can rest on an insulating layer of the wall structure. The sealing strip adjoins the interior of the room usually at such an insulating layer or extends over a portion of the same, usually at this fitting. In this area, the sealing strip should impair the diffusion of water vapor inside the room to the outside of the room as little as possible. Overall, the sealing tape should therefore meet a complex requirement profile, which is met only inadequately by previously known sealing bands.

The DE 202 15 528 U1 describes a sealing tape for sealing a connecting joint with a first and a second strip-shaped web, wherein the first strip-shaped web vapor-diffusion open and the second web is formed vapor-diffusion-tight. The webs each include a carrier web and a laminated film, wherein the film is formed open to vapor diffusion or vapor diffusion.

The invention has for its object to provide a sealing tape for sealing between areas of a building wall structure, which solves the above problems.

The object is achieved by a sheet-like sealing strip according to claim 1, which in addition to the first strip of a stretchable and tear-resistant material (first material) further comprises a strip extending in the longitudinal direction of the second strip, wherein with respect to the width of the strip, the first strip and the second strip at least in regions, or preferably over the largest part (preferably ≥50-75% or in particular ≥80-90%) of the length of the Sealing tape or more preferably over the entire length of the sealing strip are arranged side by side. The first strip in this case has a water vapor diffusion resistance which is at least 20% higher than that of the second strip (in each case the second strip as reference value 100%). The second strip has a Sd value in the range of 0.01 m to 20 m. The first strip also preferably has a higher tensile strength and / or a higher elongation at break than the second strip.

This makes it possible that the first strip of the sealing strip is arranged made of a stretchable and tear-resistant material at the sealing region to which the sealing strip is subjected to increased tensile forces. This is required, for example, in the sealing of a building wall structure when the two sealed by the sealing tape areas of the wall structure undergo certain changes in position to each other, for example, due to thermal fluctuations, shocks and vibrations or the like or the sealing strip is subject to mechanical tensile stresses during or after its installation. On the other hand, by the second strip of the second material, the sealing strip in a longitudinal region a low, preferably preferably with the humidity changing water vapor diffusion resistance (WDD resistance), whereby the sealing strip is particularly adapted to be used in the area of a thermal barrier layer of a building wall structure or the like to be, for example, the thermal barrier coating or the insulating material over a portion of the same superimposed overlapping. As a result, the sealing tape can meet the requirements in terms of adjusting the water vapor diffusion resistance of the building insulation in a special way, especially in training with variable WDD resistance. The sealing strip according to the invention comprising a first and a second strip of said materials thus fulfills in a special way the complex profile of requirements with respect to the various ones Areas of a building seal, which can not be met by a single material in this way. For example, low water-diffusion resistance sealing tapes are known per se for sealing building areas, but such materials do not meet the requirements for high ductility and tear resistance, particularly for materials having humidity-altering WDD resistance. If such a conventional material is used, a second sealing element must be used for optimum sealing of the building area in order to meet the requirements of ductility, tear resistance and usually also UV resistance in the wall mounting area, which significantly increases the assembly effort and also the error rate of the seal , The sealing strip according to the invention thus fulfills a complex requirement profile and is also easy to assemble, wherein a high density in the transition region of the two strips is ensured due to the integration of the two strips of the sealing strip of first and second material. The sheet-like sealing strip according to the invention is thus adapted in a special way, adhered to one of the two wall building areas, to cover the transition area with an adjacent wall building area and optionally extend over a part of the surface of the adjacent wall building area and cover it superficially. The adjacent wall building area is preferably a thermal barrier coating. The sealing strip is in this case preferably fastened to the other wall building area, which may have a carrying function, for example a frame such as a window or door frame may be.

According to a particularly preferred embodiment, the second strip consists at least partially of or has a material which changes its water vapor diffusion resistance with the humidity (second material). This embodiment can be realized independently of the features of the sealing tape according to the characterizing part of claim 1 be. In particular, however, this preferred embodiment may also apply particularly preferably independently of one another in combination with one or more of the characterizing features of claim 1. Thus, the first strip preferably has a water vapor diffusion resistance which is at least 20% higher than that of the second strip, so that there is a sufficiently large difference between the WDD resistances, which reliably ensures directional water vapor diffusion for removing water. Particularly preferably, the second strip has an Sd value in the range of 0.01 m to 20 m, so that it is sufficiently low and the WDD resistance and the targeted diffusion direction of the sealing tape is determined by the first strip. Particularly preferably, the first strip has a higher tensile strength and / or a higher elongation at break than the second strip. Reference should be made to the above.

Advantageous embodiments will be apparent from the dependent claims. The features of the invention may in each case apply generally with respect to the different embodiments of the sealing tape according to the invention.

The first and second strips preferably have the same length. The first and second strips preferably extend over the entire length of the sealing strip. The longitudinal edges of the first and second strips each extend preferably parallel to one another and parallel to the longitudinal extent of the sealing strip. This can in each case apply independently of one another generally within the scope of the invention.

Preferably, the first and the second strips of the first and second material are arranged directly next to each other. As a result, additional strips of optionally further materials are dispensable, which leads to further transition or connection regions between the individual strips with the risk of material mismatches and increasing connection errors would lead. Optionally, however, in order to meet certain requirement profiles, between the first strip and the second strip at least one further material strip may be provided from a material and / or layer thickness different from the first and second material.

The first and second strips each have a connection region which extends in the longitudinal direction of the first and second strips, either in the form of an immediate connection region between the two strips or in the form of a transition region, for example in the form of at least one strip of a third material. Preferably, the first and second strips extend laterally from opposite sides of the connecting area thereof, without overlapping outside the connecting area with the respective other strip (first and second strips), more preferably without being joined to another strip of the sealing strip ( eg the third strip). The overlap-free region of the first and / or second strip preferably extends in each case over the entire length of the sealing strip without overlapping with respect to the other of the first and second strips or particularly preferably without overlapping with respect to any other strip of the sealing strip. Optionally, the overlap-free region can each extend over only a portion of the length of the sealing strip, preferably over ≥ 50 to 75% or ≥ 80 to 90% of the length thereof.

Particularly preferably, the first and the second strip are fastened directly to one another, for example, by a suitable adhesive or adhesive layer or welded connection, preferably by contact welding, wherein preferably the first material is selected to be adhered or welded to the second material with an increase in temperature to be able to. Generally, the first and second strips may be overlapped with each other wherein the overlap region extends over part or preferably the entire length of one or both of the strips. The arrangement of a further additional strip with connection of the first and second strip is thereby unnecessary. Due to the overlapping arrangement, a permanent connection between the first and the second strip is achieved, which can also absorb high tensile forces in the stresses of the first strip, on the other hand further additional strips are avoided, which also the strength of the sealing strip in the connecting region of the first and second strips would increase. In addition, this creates a sharp transition of the properties of both the first strip and the second strip, namely with respect to elongation at break and tensile strength on the one hand and WDD resistance on the other hand, so that it is ensured that not unfavorable values of the respective parameter apply in an intermediate region. As a result, the sealing tape is particularly well adapted to building situations that change greatly in a small space.

The first strip preferably has a tensile strength in the range of 2-30 N / mm ² or 3 to 20 N / mm ² , more preferably in the range of 4 to 15 N / mm ² or 4.5 to 8 N / mm ² . The first strip, independently or in combination, may have an elongation at break in the range of 50 to 1000%, preferably 100 to 750% or 200 to 500%. The elongation at break may, where appropriate, independently of this be ≥ 50-100%, preferably ≥ 50-200%, the elongation at break may be ≦ 750-1000% or, if appropriate, beyond, in particular ≦ 500-650% or ≦ 350-450%. It has been found that, as a result, a sufficiently strain-relieving connection of the second strip to the respective component can surprisingly ensue, so that the tensile forces are absorbed to a sufficient extent by the first strip. As a result, a sufficient load capacity but also tear strength of the first strip is given, so that the second strip is substantially decoupled from mechanical stresses and in terms of Water vapor permeability can be optimized.

The second strip may have a tensile strength in front of ≥ 0.25 to 0.50 N / mm ² , preferably ≥ 0.75 to 1 N / mm ² , which has proved to be particularly advantageous for many applications, if appropriate also ≥ 2 to 3 N / mm ² . The tensile strength of the second strip can be ≦ 12 to 15 N / mm ² or ≦ 7.5 to 10 N / mm ² , for example also ≦ 4 to 6 N / mm ² , which has proven to be preferred in many cases, as a result the first strip can be designed to substantially absorb the tensile forces and mechanical loads. The tensile strength of the second strip may in particular be in the range of 0.25 to 18 N / mm 2 or in the range of 0.25 to 10 N / mm 2.

The tensile strength and elongation at break are determined in the context of the invention according to DIN 7864-1.

Preferably, the first strip has a higher tensile strength and / or a higher elongation at break than the second strip, at the given material thickness of the strip. Preferably, the tensile strength of the first strip (at its given material thickness) is ≥ 10-20%, or preferably ≥ 35-50%, or more preferably ≥ 100-200%, higher than that of the second strip. The tensile strength of the first strip may be ≤ 6 to 8 times or even ≤ 10 to 15 times or ≤ 20 times the second strip. In particular, the tensile strength of the first strip may be between 20% and 20 times higher than that of the second strip, for example between 50% and the factor 5 or the factor 10 or higher.

Independently of this, or particularly preferably in combination with it, preferably the elongation at break of the first strip is ≥ 35-50% or particularly preferably ≥ 100-200% or ≥ 300-500% greater than the breaking elongation of the second strip. The elongation at break of the first strip may be ≤ 20 to 25 times or ≤ 12 to 15 times that of the second strip. In particular, the elongation at break of the first strip may be between 35% and 25 times that of the second strip, for example between 50% and a factor of 15 higher than this. As a result, tensile forces or expansion forces can in particular be absorbed by the first strip in particular, for example due to changes in position of the two building wall regions sealed by the sealing strip, for example due to vibrations, thermal expansion of the building wall areas or the like. There is also a sufficient decoupling of the building wall areas of the second strip, which has a lower tensile strength.

The first strip may consist predominantly (to ≥ 50-75% by weight or preferably ≥ 85-95% by weight or completely) of a polyolefin or a rubber material or a combination of these two materials. In particular, the first strip may comprise predominantly (at least ≥ 50-75% by weight or preferably ≥ 85-95% by weight or completely) of at least one of EPDM (ethylene-propylene-diene rubber), APTK (ethylene Propylene terpolymer rubber), FPM (fluoro rubber), FKM (fluorocarbon rubber), styrene-butadiene rubber (SBR), halogenated rubber, CR (polychloroprene rubber), AU (polyester-urethane rubber), EU (polyether urethane rubber) or butyl rubber or mixtures thereof. The blends may be blends of these materials containing two or more of them side by side, or copolymers thereof, for example in the form of block polymers or random polymers. Particularly advantageously, the first strip consists of EPDM or has a continuous layer of EPDM. The O and / or N content of the polymeric material which volatilizes when pyrolysed with oxygen in excess at 500 ° C, is independently of each other preferably ≤ 10% or ≤ 2-5 wt .-% or ≤ 0.5-1 % By weight, particularly preferably ≦ 0.1-0.2% by weight, based on the residue of ignition of the polymeric material at 1000 ° C). The polymeric material of the first strip preferably has no hydrophilic functional groups, ie no O- and / or N-containing groups, not on the side groups and / or not in the polymer backbone.

Particularly preferably, the first strip consists of a non-porous material or has no components or layers of porous material. This is preferably the case for the regions of elongation at break and / or tensile strength or material layers thereof. Preferably, the porosity (pore volume) of the elongation at break and / or tensile strength determining regions or material layers of the first strip is ≦ 10-20% by volume or ≦ 3-7% by volume or ≦ 0.5-1% by volume thereof , As a result, a high elongation at break and / or tensile strength and a comparatively high WDD resistance can be obtained, which are determined by the intrinsic material properties of the material.

The first strip may have a thickness of ≥ 0.025-0.05 mm or ≥ 0.1-0.2 mm, preferably ≥ 0.3-0.5 mm or optionally ≥ 1-1.5 mm. As a result, the strip has a sufficient strength even at high loads, in particular a sufficiently high tensile strength. The thickness of the first strip may be ≦ 2.5-3 mm or preferably ≦ 1.5 mm, more preferably ≦ 1 mm, thereby avoiding too high a weight of the material and possibly too high rigidity of the first strip. The thickness of the first strip may thus be in the range of 0.025 to 3 mm in particular.

The first and / or the second strip are preferably at least substantially impermeable to air. The first strip may have an air permeability of ≦ 2-5 l / m ² s or preferably ≦ 0.5-1 l / m ² s or ≦ 0.1-0.25 l / m ² s or more preferably ≦ 0.01 -0.05 l / m ² s according to DIN EN ISO 9237 at a measuring pressure (negative pressure) of 1 mbar (measuring area 100 cm ² ). The air permeability measurement can be generally within the scope of the invention each with an air permeability meter from the company. Frank, Type 21443 done. Irrespective of this, the second strip may have an air permeability of ≦ 2-5 l / m ² s or preferably ≦ 0.5-1 l / m ² s or ≦ 0.1-0.25 l / m ² s or more preferably ≤ 0.01-0.05 l / m ² s according to DIN EN ISO 9237 at a measuring pressure (negative pressure) of 1 mbar (measuring surface 100 cm ² ) (this may in particular separately for the layer of the material with moisture-dependent water vapor diffusion resistance, in particular the ionomer film)). The first and / or second strips may each comprise at least one continuous material layer, preferably of uniform thickness, or may be present in their entirety as such, which determines the air impermeability of the respective strip. With respect to the first strip and / or the second strip, the airtight continuous layer is preferably the layer which at least substantially co-determines the tensile strength and / or extensibility of the strip (ie, this layer alone is ≥ 50-75% or preferably ≥ 85 -90% of the tensile strength and / or the elongation at break of the strip material as a whole). This layer of the respective strip may have the air permeability stated at the beginning of this section.

The second strip preferably has an s _D value in the range of 0.01 m - 20 m or 0.1 m - 20 m, preferably ≥ 0.2-0.5 m or ≥ 1-2 m, the s _D Value can generally be ≤ 15-20 or ≤ 5-10 m, in each case at 25% relative humidity in accordance with DIN 52615. In particular, the s _D value can be in the range of 0.5 m-20 m or 1-10 m. Regardless of or in combination with this, the second strip may have an s _D value of 0.02 m - 4 m or 0.05 m - 2 m at 72.5% relative humidity according to DIN 52615. Unless otherwise specified in DIN 52615, the s _D values generally refer to a temperature of 20 ° C. in the context of the invention.

Particularly preferably, the second strip has a in Depending on the humidity changing WDD resistance. For this purpose, the second strip may have a layer, preferably with respect to the strip extension, of a full-surface layer of such a material. The material layer of this material can be continuous. Optionally, the second strip may also be made of a material that does not change its WDD resistance as a function of the humidity.

The s _D value (water vapor diffusion value based on an air layer thickness in meters) of the second strip at 25% relative humidity on the one hand and 72.5% relative humidity on the other hand (each at 20 ° C.) preferably differs by a factor of ≥ 1 in each case , 1-1.2, preferably ≥ 1.5-2, optionally up to a factor of 3 to 5 or to 10 or to 20 or beyond, whereby the dependence of the water vapor diffusion of the second strip is defined by the humidity, so for example by a factor in the range of 1.1 to 20. This can be for each of the values at 25% or at 72.5% rel. Humidity independently or in combination with each other apply. The difference between the two s _D values of the second strip at the two indicated relative humidities can be ≥ 0.25 moder ≥ 0.5 m or preferably ≥ 0.75-1 m. This results in different environmental conditions, for example in summer or winter or in different climates, a sufficient dependence of the water vapor diffusion resistance to achieve a sufficient adjustment of the water vapor diffusion resistance to the ambient conditions even with different relative humidity of the environment.

The first strip is preferably made of a material (including composite material or composite material) having a higher water vapor transmission resistance than the material of the second strip (for a given layer thickness of the strips), for example based on 20 ° C and a relative humidity of 50%. It is understood that also the second strip may have a composite material or a composite material. The water vapor diffusion resistance of the first strip may be at 20 ° C and 50% relative humidity by ≥ 10-20% or ≥ 50-100%, preferably ≥ 3-5 times or ≥ 10-20 times more preferably ≥ 50-100 times the The value of the second strip may be higher, so that the wall region covered by the first strip may be protected more effectively or substantially impervious to water vapor diffusion and, for example, the frame component may be particularly effectively protected by the sealing strip and, on the other hand, the wall region covered by the second strip may be relatively permeable to water vapor diffusion, such that Water vapor in the region of the second strip can diffuse away from the inside to the outside, in particular on the room side. It has proved to be sufficient in many cases, when the water vapor transmission resistance of the first strip under the said conditions ≤ 10,000-50,000-fold or ≤ 2,000-5,000-fold or even ≤ 500-1,000-fold or ≤ 100-250-fold SD value of the second stripe is, for example, in the range of 10% to 50,000 or in the range of 20% to 2,000 or 5,000 or in the range of 50% to 500-1,000 each larger than the SD value of the second stripe ,

Particularly preferably, the first strip consists of a material which has a lower dependence of the water vapor diffusion resistance of the humidity than the material of the second strip, for example based on 20 ° C and a range of humidity of 10-90% relative humidity or 20-50% relative humidity, at the specified temperature. The dependence of the water vapor diffusion resistance of the humidity in the said humidity range at 20 ° C may be ≤ 35-50% or ≤ 15-20%, especially ≤ 5-10% of said dependence of the water vapor diffusion resistance of the humidity of the second strip, in the each with the same conditions. In particular, the first strip can substantially no dependence of the water vapor diffusion resistance of the

Have humidity.

The second strip preferably comprises an ionomer material as material whose water vapor diffusion resistance changes with the air humidity, optionally also a polyamide material or another suitable material, in the case of a design having a variable WDD resistance. The material which changes its moisture vapor diffusion resistance with the humidity, in particular the ionomer material, can be present in particular as a layer or foil. The layer or film may be formed continuously over the surface extension thereof. The layer or foil may be present without openings, that is, be impermeable to air or air pressure.

An inventively usable ionomer material is for example from the DE 199 02 102 B4 . DE 195 14 420 C1 . EP 1 372 956 A1 or even the US 2005/0284096 A1 the disclosure of which is hereby fully incorporated. In particular, the second strip of the sealing strip may consist of a material, as described in one of the cited documents.

By "tonomer material" is meant a polymeric material in which the polymer material has ionic groups, especially acrylate or methacrylate groups, each linked by chemical valence bonds to side chains or the backbone of the polymeric material. The polymer backbone is thus preferably negatively charged. The countercations to the polymer backbone are preferably selected from the group ammonium, lithium, sodium, potassium, magnesium, calcium or zinc or mixtures thereof, more preferably sodium and / or potassium, most preferably sodium.

In particular, in relation to the definition of the term "ionomers", see Rompps Chemie-Lexikon, 9th edition, 1990 , referenced, according to which random thermoplastic copolymers of (i) a monoolefin, (ii) a monoolefinic unsaturated acid, (iii) if desired further comonomers for modifying the chemical and physical properties of these copolymers, and (iv) the acidic groups of these copolymers wholly or partly inorganic cations are neutralized. In extension of this definition, non-random copolymers are also included, for example block polymers of a monoolefin and a monoolefinic unsaturated acid whose acidic groups are neutralized in whole or in part with inorganic cations. It is understood that the term "a monoolefin" and "a monoolefinic saturated acid" are each independently of one another in the sense of "at least one" to understand and also mixtures and / or copolymers thereof.

Particularly preferably, the ionomers used in the invention comprise i) 50-99 mol% of ethylene and ii) 1-50 mol% of methacrylic acid, iv) the acidic groups of these copolymers being 0.5-100%, preferably 10-70 % are neutralized with counterions.

The ionomeric material used preferably has no amide and / or urethane groups, which is ecologically preferred, for example, disposal of the material by combustion, with respect to the UV resistance of the material and with respect to a higher adjustable dependence of the water vapor diffusion resistance of the Moisture, which is preferred for many applications with respect to the sealing of the wall building area. Particularly preferably, the ionomer material is free of nitrogen or contains nitrogen to ≤ 7-10% by weight or ≤ 3-5 wt .-% or preferably ≤ 0.5-1 wt .-% or ≤ 0.1-0.25 % By weight, based on the components released when the material is oxidized under an excess of oxygen at 300 ° C.

If the second strip does not exhibit any moisture-modifying WDD resistance, it may consist of a material / material suitable for other requirements, in particular as a plastic film (including a composite film), or as the WDD resistance of the WDD resistor Have strip defining material. The material may be, for example, a polyolefin film such as a PE or PP film or a polyester film or the like.

In general, in the case of the material of the second strip, the water vapor diffusion resistance (s _D value according to DIN 52615) preferably decreases with increasing relative humidity, if this at least partially consists of a material that is WDD-variable with the humidity, such as a WDD-variable film.

The second strip may be multi-layered, in particular a multilayer composite layer. One or both sides of a WDD resistance determining layer of the strip (WDD layer) such as ionomer or a layer with depending on the humidity changing water vapor diffusion coefficient (delta-s _D layer) can each at least one layer of at least one other material be arranged. The one or both further layers, which partially or completely cover the WDD layer in each case, can protect and support this layer and increase the stability of the second strip, even when the layer is formed as a delta-s _D or ionomer Layer. The individual layers can each consist of the same or different material, in particular if they are arranged on both sides of the same to the WDD layer or ionomer or delta-s _D layer. The one or both further layers preferably each have an s _d value which is below the lowest s _d value of the ionomer layer or delta-s _D layer. Optionally, further layers of water vapor permeable scaffolding and / or processing auxiliaries may be provided.

The one or both sides of the WDD layer such as the Ionomerbzw. Layers arranged in the delta-s _D layer may in particular be nonwovens, woven fabrics or meshes of inert materials such as polyethylene, polypropylene, polyester, glass fibers or viscose, if appropriate also perforated films, in particular those of polyethylene, polypropylene or polyester. The layers may generally be any suitable material which is in layered form and preferably has no higher s _D than the ionomer layer.

The WDD layer, in particular ionomer layer or delta S _D layer, in particular in each case in the form of a film, can have a thickness of 2 to 200 μ, preferably in the range of 5 to 100 μ or 5 to 50 μ, particularly preferably in the range from 5-30 μ.

Optionally, the ionomer or delta-s _D layer can also be in the form of a sheet-like impregnating material in which the amount of the ionomers or the material causing the Delta-s _D effect (delta-s _D material) is 1-500 g / m 2, preferably 2 -100 g / m2, for example 10-75 g / m2. The carrier material of the impregnating material may be a textile material such as a fleece or fabric or a porous material. The impregnation preferably forms a closed reacted film.

The ionomer material or delta-s _D material can be present as a blend (blend or copolymer) with other polymeric materials such as polyesters, polyamides, vinyl acetates, etc., such as in the EP 1372956 A1 described. The proportion of the isomers in the blend can be 20-99.5% by weight, for example 25-95% by weight, or pure ionomer can be used as the layer material.

The WDD layer. In particular ionomer or delta-s _DS layer, preferably forms a continuous, non-porous and non-perforated layer, particularly preferably one with a Air permeability of ≤ 1-5 l / m ² s or ≤ 0.1-0.5 l / m ² s at a negative pressure of 1 mbar (according to DIN EN ISO 9237, measuring surface 100 cm ² ).

The thickness of the layers surrounding the WDD layer can be a total of 10 to 1,500 .mu.m, preferably 10 to 500 .mu.m, more preferably 10 to 250 .mu.m, particularly preferably 10 to 90 .mu.m per side independently. The total thickness of the second strip may be in the range of 0.1-3 mm or 0.2-2 mm, preferably 0.2-1 mm.

Preferably, the first strip has an s _D value of 10-2,500 m, particularly preferably 20-1,000 m or depending on the requirement of 20-500 m or of 40-1,000 m. The values refer in each case to 25% relative humidity and 20 ° C, if according to DIN 52615 - which otherwise applies - nothing else results. Preferably, the water vapor diffusion resistance of the first strip under comparable conditions (in particular 25% and / or 72.5% relative humidity according to DIN 52615) by more than the factor 2-3, preferably ≥ 5-10, particularly preferably ≥ 15-20 higher than the water vapor diffusion resistance of the second strip.

The sealing tape is partially distributed in the tape longitudinal direction provided with an adhesive or providable, preferably in the region of both longitudinal edges. Particularly preferably, the sealing tape is provided with an adhesive at least in the region of a longitudinal edge or both longitudinal edges. Preferably, the area provided with the adhesive or providable area extends over the entire length of the sealing strip, preferably in the longitudinal direction of the same throughout. "Foreseeable" includes that an adhesive is associated with the sealing tape to be applied thereto (eg in the form of a set) and / or a zone is provided on the sealing tape which is particularly adapted for applying the adhesive, for example a corresponding one Has surface and / or a limitation of a Adhesive application zone, for example in the form of an optical and / or mechanical delimitation of the zone, for example in the form of a line. The adhesive to be applied may in particular be an adhesive paste, in particular solvent-based adhesive paste, such as, but not limited to, a butyl adhesive.

Preferably, an adhesive layer (or an adhesive to be applied) is arranged (at least) on the first strip, by means of which the first strip can be fastened to the first wall of the building. The building wall area may in particular represent a frame profile, in particular a window or door frame, or a facade element, each preferably made of a metallic material. The adhesive layer of the first and / or second strip may each be covered by a protective film. Preferably, the second strip is also provided with an adhesive layer on the edge opposite the first strip. However, if necessary, the second strip does not have an adhesive layer (except, if necessary, the adhesive layer for attaching the second strip to the first strip) so that the second strip is positionally changeable and non-adherent to the region of the wall structure, such as an insulating layer, opposite thereto is.

Preferably, the respective adhesive layer is arranged in the region of one of the longitudinal edges of the sealing strip. As a result, overall, the sealing strip can be used simply and flexibly in the covering of the respective wall region.

If the first and second strips are arranged overlapping one another, the adhesive layer on the first strip may preferably be arranged on the side of the strip opposite the second strip. The sealing strip can be applied so flat to the building wall area to be sealed and is also manufacturing technology by attaching the other Layers / stripes on the submitted first strip easy to produce. If an adhesive layer is arranged on the second strip, then this can be arranged on the same side as the adhesive layer of the first strip or on the side of the second strip opposite thereto. On the first and / or second strip, the adhesive layer may in particular be applied on both sides (ie on the front and back of the sealing strip), preferably in plan view of the sealing strip - with respect to the respective strip - at the same height, ie one behind the other.

The width of the first strip may be ≥ 5-10% or ≥ 15-20% of the total width of the sealing tape. The width may be ≦ 80-90% or preferably ≦ 66-75% or ≦ 40-50%, if appropriate also ≦ 20-50% thereof. The width may therefore be, for example, in the range of 5-90% or 15-75% of the width of the sealing strip. In this way, on the one hand, the second strip may have a sufficiently large width to allow sufficient diffusion of water vapor through the sealing strip, on the other hand sufficient elasticity and tightness (based on driving rain, airtightness and / or water vapor tightness) of the sealing strip at the area of the building wall, to which the first strip is attached, given. The specified width always refers to the width of the first strip, which is free of overlap with the second strip.

Preferably, the width of the second strip is greater than the width of the first strip. The width of the second strip may be 5-10% or 20-35% or preferably ≥55-60% or even ≥65-75% of the width of the sealing strip, and possibly ≥80% of the same. The width of the second strip may be ≤ 80-90% or preferably ≤ 66-75% or 40-50%, optionally 20-30% thereof. The width may therefore be, for example, in the range of 5-90% or 15-75% of the width of the sealing strip. This can be a sealing strip with high, humidity-dependent water vapor permeability can be given, which nevertheless in combination herewith has a high elasticity and tear resistance due to the arrangement of the first strip. The specified width refers in each case to the width of the second strip, which is free of overlap with the first strip.

According to a preferred embodiment, the first strip and / or the second strip are each arranged on an edge region of the sealing strip, thus each independently form the edge region of the sealing strip.

According to a further preferred embodiment, the sealing strip next to the first and second strips may have a third strip, which consists of the first material, which thus has a high tensile strength and elasticity. The first, second and third strips extend in sealing strip longitudinal direction. As a result, with a certain wall construction, for example, the respective edge region of a joint can be sealed with a stretchable and tear-resistant material so that thermal or mechanical stresses, for example due to thermal expansion or vibrations, can be absorbed at the connection region of the sealing strip with the respective building region. On the other hand, a diffusion of water vapor through the sealing strip is made possible by the intermediate region of the sealing strip from the second strip, also as a function of the relative humidity of the environment. It is understood that the first and the third strip may be made of the same material or of another each tear-resistant and elastic material. The first and third strips may each be provided with an adhesive layer, which may each be covered with a peelable protective film. The adhesive layer may be arranged in each case on the laterally outer wall region of the first and third strips. The adhesive layers in the first and third strips may be attached thereto Be arranged side of the sealing strip or the same on opposite sides.

The sealing tape according to the invention is a lappig set sheet. Preferably, the first and second strips of the sealing strip are each set lobed fabrics. Any further strips of the sealing strip are preferably likewise lobed set fabrics. Due to the lobed setting, the sealing strip can be easily adapted in each case in its shape shape to the geometry of the corresponding frame member.

The height of the sealing tape is substantially smaller than its width, e.g. greater than or equal to the factor 10-20 or greater / equal to the factor 50-100, so that the sealing tape is not strong and as described on the surfaces of the respective wall areas is sealingly fastened. The sealing strip can thereby cover a joint on the outside, the joint on both sides cross, and next to the joint at the adjacent building areas set or be fixed, in particular with the first strip on a building area and arranged with the second strip on the other, on the opposite joint side building area. The quotient of the width and height of the sealing tape may be ≦ 500-1,000 or ≦ 5,000-10,000, without being limited thereto. The sealing tape may for example have a height of ≤ 3-5 mm or ≤ 1-2 mm, without being limited thereto. As a result, the sealing tape is also easy to fold in the longitudinal direction. The sealing band height can be ≥ 0.1-0.2 mm or ≥ 0.3-0.5 mm, so that the sealing band is sufficiently stable, in particular traction-absorbing and / or tear-resistant, e.g. also ≥ 1 mm.

The sealing strip as well as the first and the second strip each have a main extension plane, with a flat arrangement of the sealing strip. The main extension plane of the first and second strips (and possibly one or more strips) are parallel to each other and parallel to the main plane of extension arranged the sealing strip, in a flat arrangement of the same. The main extension plane is in each case the plane with the largest surface extension of the respective strip or sealing strip.

Also included in the invention is a building with two wall building areas, for example a profile part or masonry area on the one hand and an adjacent area of the wall structure on the other hand, and with a sealing area between these sealing flat sealing strip, wherein the sealed area is sealed by means of a sealing strip according to the invention. The profile part may be a frame member (eg, a frame inserted into a masonry opening such as a window or door frame) or a cowling (eg, a cowl of the building skin such as a cladding panel, cowl of a sash, cowl of an interior lining of a room such as a wall panel or the like). especially first or second mentioned). The profile part is generally preferably different from a masonry area. The "adjacent area of the wall structure" may in particular be a thermal barrier coating. The transition region can be, for example, a building joint or a joint area of adjacent building areas, in particular (i) of masonry and thermal insulation layer or (ii) of cladding part of the building outer skin or window reveal and thermal insulation layer. According to the invention, the building area to be sealed is sealed with a sealing tape according to the invention. In this case, the sealing strip according to the invention can be arranged so as to overlap the transition region between the two wall construction regions and / or a surface region of at least one of the two wall construction regions, in order to seal this wall construction region. It will be appreciated that with respect to the structure, the first and second strip embodiments refer to the same sealing strip, respectively. However, several sealing strips according to the invention can also be arranged on the same wall building area, for example on the outside of the room and on the other hand the interior of the wall building area.

The first strip of the sealing strip of the first material is preferably arranged on the outside of the space and the second strip of the sealing strip is arranged in relation to the first strip of space on the inside. Starting from a wall structure with a room outside and a room inside, the first strip thus has a partial area, which preferably extends over the entire length of the first strip, which is arranged closer to the outside space than a portion of the second strip or as the second strip in total , Regardless of this, the transition region between the first and the second strip is preferably arranged on the inside in relation to the first strip or at least the edge region of the first strip facing away from the second strip, that is to say further to the interior side than this first strip or the outside edge region of the first strip. As a result, strains or mechanical stresses of the sealing strip can be absorbed by the first strip. Furthermore, the first strip has a higher water and / or airtightness than the second strip and is preferably formed so that rain-tight, so that provided by the first strip even when exposed to external environmental influences such as sun, wind or rain through the sealing strip, a tightness of the building structure and on the other hand by the second, inside space arranged strips of the sealing strip nevertheless has a comparatively low water vapor diffusion resistance, wherein at the same time the sealing strip can be handled as a unitary component, without having to connect the first with the second strip on site.

The terms "interior space" and "space outside" in the context of the invention are to be understood in the sense of "the interior facing" and "the exterior facing", unless otherwise stated in the context.

The sealing strip is preferably arranged on a masonry area comprising a thermal insulation layer, wherein the second strip of the second material covers at least a part of its width a heat-insulating layer of the wall-building area.

On the other hand, in some embodiments of the wall construction area, the first strip can also cover a heat-insulating layer on a load-transferring wall area, such as a masonry area or wall area made of concrete, and the second strip, which is more permeable to water vapor diffusion, at least partially covering a heat-insulating layer (ie immediately overlapping or resting against it) and over a partial area be arranged extending the same. The sealing tape may in turn be attached to the masonry area by means of the adhesive / adhesive layer of the first strip. If appropriate, the first strip may also be arranged on the inside of the room and the second strip on the outside of the room. Preferably, the first strip is also arranged on the outside of the room and the second strip on the inside. The first strip may be attached to the respective building part or part of a metal structure or another frame part outside the room.

If the sealing strip according to the invention in installation position covers a first area with a first water vapor permeability and the second strip covers a second area with a second water vapor permeability, the second strip can generally be projected over a larger area over the wall building area with higher water vapor permeability (eg the thermal barrier coating) ) than the first strip (eg in the area of a masonry, frame component and the like).

On the one hand, the sealing strip preferably covers a partial area of a dimensionally stable wall building area, such as a masonry area, Frame component or trim part, preferably with the first strip, and with another portion at least partially an end face of a thermal barrier coating, for example with the second strip. The partial area of the strip, preferably of the second strip, which covers the front side, is preferably drawn over a partial area of a side surface of the thermal barrier coating adjoining the front side. Preferably, the second strip is applied to the front side and the side surface of the thermal barrier coating.

In the context of the invention, the second strip preferably covers at least partially an end face of a thermal barrier coating, preferably directly adjacent to it.

Preferably, the first strip having an adhesive layer is affixed to a mechanically stable wall building area such as a support wall, a frame profile such as a frame (e.g., window or door frame) inserted in a masonry opening, or a trim component such as a cladding panel or window soffit. The sealing strip can in this case be arranged on the outside of the wall construction area. The second strip may be attached to a building area by means of a further adhesive layer, but preferably the second sealing strip does not have a separate adhesive layer (except the connecting area with the first strip). Both the first and the second strips can be provided with adhesive, one-sided and reciprocal.

Preferably, the second strip attached to the support structure is equipped with adhesive. The first strip is often attached to the façade panel with solvent-borne SBR rubber on site.

Optionally, the first strip of adhesive may be attached to a thermal barrier coating, the sealing tape is preferably arranged inside the room on the wall building area.

In general, the thermal barrier coating may consist of a thermal insulation material such as polystyrene (styrofoam), polyurethane foam, mineral wool, fiberglass or the like. The thermal barrier coating can be self-supporting. The insulating material may have a thermal conductivity λ _R of ≦ 0.15 W / mK, preferably of ≦ 0.08-0.1 W / mK, particularly preferably of ≦ 0.05-0.06 W / mK, for example also in the range from 0.035 to 0.04 W / mK.

The formation of the first material from a rubber material has the further advantage that it can be provided in a simple manner superficially adhering with a sealant, wherein such, well adhering to rubber materials sealing compounds are known.

Figuren 1-3

erfindungsgemäße Dichtungsbänder unterschiedlicher Ausführungsformen im Querschnitt (Fig. 1a, 2, 3) und in Draufsicht (Fig. 1b),

Figur 4

einen Wandaufbau mit erfindungsgemäßem Dichtungsband einer ersten Ausführungsform,

Figur 5

eine schematische Darstellung eines Wandabschnittes mit erfindungsgemäßem Dichtungsband einer alternativen Ausführungsform.

The invention will be explained below by way of example with reference to FIGS. Show it:

Figures 1-3

Sealing tapes according to the invention of different embodiments in cross section ( Fig. 1a, 2, 3 ) and in plan view ( Fig. 1b )

FIG. 4

a wall structure with inventive sealing strip of a first embodiment,

FIG. 5

a schematic representation of a wall section with inventive sealing strip of an alternative embodiment.

Fig. 1 shows a surface-shaped sealing strip 1 according to the invention for sealing a wall building area 100 (see Fig. 4 ), in particular a transition region between adjacent wall building areas, such as Fig. 4 and 5 according to particularly preferred embodiments set forth in detail.

The sealing strip 1 has two longitudinal edges 2, 3 and is provided with a strip-shaped region 4 of an adhesive or adhesive extending in the strip longitudinal direction, for example a self-adhesive layer, by means of which the sealing strip 1 is attached to a component 110, 120 and / or a support structure 130 can be attached or fastened (see Fig. 4 ). The sealing tape is set lappig and constructed in the manner of a composite film. The width of the sealing strip is hereby - which can generally be considered within the scope of the invention - greater than or equal to the factor 25 to 50 or greater than / equal to the factor 75 to 100 greater than its thickness.

The sealing strip has a first strip 5, which extends in the longitudinal direction of the strip, of a stretchable and tear-resistant material (first material), here of a rubber material, in particular EPDM.

The band 1 further has a second strip 10, extending in the longitudinal direction of the band, of a material different from the material of the first strip. According to all embodiments, the second strip may each have a water vapor diffusion resistance (WDD resistance) according to a first variant, wherein the WDD resistance of the first strip is preferably at least 20% higher than that of the second strip (second strip: 100%). The second strip in combination therewith or independently thereof has a Sd value of less than 20 m, for example in the range of 0.01 m to 20 m. Furthermore, the first strip usually has a higher tensile strength and / or a higher elongation at break than the second strip. According to a second variant, the second strip has a reversibly changing with the humidity WDD resistance, ie, at least partially or completely of a material (second material) with the humidity reversibly changing WDD resistance, eg. In the form of a layer or Layer of such material. According to this variant, the first strip preferably has a water vapor diffusion resistance which is at least 20% higher than that of the second strip. The second strip preferably has an Sd value of less than 20 m or in the range of 0.01 m to 20 m. Preferably, the first strip has a higher tensile strength and / or a higher elongation at break than the second strip. According to the embodiments of this second variant, these features are realized in combination, but they can also be implemented independently of each other. The second variant can be realized according to all embodiments. If reference is made to a variant in one exemplary embodiment, it is understood that in order to avoid repetition, the respective embodiments may also apply correspondingly to the other variant.

With regard to the width B of the band, the first strip 5 and the second strip 10 are arranged next to each other at least in regions, here over the entire length of the sealing strip. The first and second strips both extend over the entire length of the sealing strip. The lateral outer longitudinal edges 5a, 10a of the first and second strips each extend parallel to one another and parallel to the longitudinal extension of the sealing strip 1.

The first strip 5 of first material and the second strip 10 of second material are arranged directly next to one another. The first strip 5 and the second strip 10 are fastened directly to one another, here overlapping one another, and are adhered to one another in the overlapping region 7, here by welding or alternatively by an adhesive layer (not shown). The main extension planes of the first and second strips H1, H2 are arranged parallel to each other and parallel to the main plane of extension H of the sealing strip, in the flat arrangement thereof shown.

The second material may according to the first variant consist of a suitable plastic film or a preferably continuous layer of such comprise, for example. From PE.

The second material according to the second variant comprises a continuous ionomer film (e.g., Surlyn 8150, Surlyn 8945, Himilan MK 154) or delta sD film, which is provided on both sides, for example, with a nonwoven layer for protection and stabilization of the ionomer film. The ionomer or Delta SD film forms a continuous, non-disruptive layer, which generally also applies to the WDD film of the first variant.

The first strip has a higher tensile strength and / or a higher elasticity (lower elastic modulus) than the second strip. For example, the tear strength of the first stripe is 5 times higher than that of the second stripe, and the elasticity of the first stripe is 10 times higher than that of the second stripe, for example. In particular, both can apply in combination.

The first strip consists entirely of a material which in this case has essentially no dependence of the water vapor diffusion resistance on the atmospheric moisture, namely EPDM. The O and / or N content of the polymeric material of the first strip, in this case EPDM, which volatilizes when pyrolysis with oxygen in excess at 500 ° C, is ≤ 0.1-0.2 wt .-% based on the ignition residue of the polymeric material at 1000 ° C.

The first strip has a thickness of 1 mm, the second strip has a thickness of 0.5 mm.

The first and second strips are at least substantially air impermeable. The first and second strips each independently have an air permeability of ≦ 1-3 l / m 2 s, more precisely ≦ 0.2-0.01 l / m 2 s according to DIN EN ISO 9237, at a measuring pressure (negative pressure) of 1 mbar.

The second strip has an s _D value of 0.5 m at 25% relative humidity according to DIN 52615.

In training according to the second variant with variable WDD resistance according to the example of the second strip has an s _D value of 0.5 m at 25% relative humidity according to DIN 52615 and an s _D value of 0.1 m at 72.5 % relative humidity according to DIN 52615, each at 20 ° C. The water vapor diffusion resistance of the material thus increases with increasing humidity. The s _D value of the second strip at 25% on the one hand and at 72.5% relative humidity on the other hand (each at 20 ° C) thus differs by approximately the factor 5, the difference of both s _D values of the second strip in the both specified relative humidities is about 0.4 m. The further layers of the composite material of the second strip each have a s _d value, which is below the lowest s _d value of the delta sD or tonomer layer, here more than by a factor of 10. The delta sD or ionomer layer has a Thickness of about 20 μ.

The first strip is made of a material which has a higher water vapor diffusion resistance than the material of the second strip, based on 20 ° C and a relative humidity of 25%, more specifically, the first strip has an s _D value of about 50 or also For example, about 500 m in accordance with DIN 52615. The water vapor diffusion resistance of the first material at 20 ° C and 50% relative humidity is thus about 1000 times higher than the value of the second strip, so that the first strip is substantially water vapor diffusion tight. The first strip has essentially no dependence of the water vapor diffusion resistance on the humidity.

The first and the second strips are waterproof to splash water, in particular impact-proof at ≥ 300 Pa or ≥ 600 Pa, according to DIN EN ISO 1027. Water droplets applied to the respective strip do not penetrate the strip material to the opposite side under the action of gravity.

The first strip 5 is covered with an adhesive layer 4, preferably as a self-adhesive layer, with a covering film 4a which can be pulled off for use. The second strip is factory provided with an adhesive layer 11, preferably as a self-adhesive layer with cover 11a with an adhesive layer. The adhesive layer of the first strip is arranged in the region of the laterally outer longitudinal edge 5a of the strip 5, independently of which the adhesive layer of the second strip is arranged in the region of the opposite outer longitudinal edge. As a result, overall, the sealing strip can be used simply and flexibly in the covering of the respective wall region. The adhesive layer 4 on the first strip is arranged on the side opposite the second strip (lower side 5d) (upper side 5c) of the strip, optionally also on the lower side. Generally within the scope of the invention, the first and / or the second strip can be factory-provided with an adhesive layer, on one side or on both sides. This adhesive layer may be, for example, a butyl rubber or a self-adhesive layer. If appropriate, the first strip may also be provided on the construction site with an adhesive, for example an adhesive paste, optionally also the second strip. The respective layers of adhesive serve to fasten the sealing strip to a building area of the building to be sealed.

The width of the first strip is about 33% of the width of the tape 1, the width of the second strip about 66% of the width of the tape.

FIG. 2 shows a modification of the strip Fig. 1 Incidentally, the above-mentioned full reference is made, also with respect to the two variants mentioned. After Variation between the first and second strips 5, 10, a third strip 15 is provided of a material which is different from the material of the first and the second strip. The material of the third strip here has a high tensile strength, similar to that of the first strip, but an elasticity which lies between that of the first and the second strip. As a result, the material of the third strip can still adapt very well to the shape of the building structure, but elastic forces are absorbed mainly by the first strip. The first strip and the second strip are each arranged on an edge region of the sealing strip.

FIG. 3 shows a further modification of the strip Fig. 1 Incidentally, the above-mentioned full reference is made, also with respect to the two variants mentioned. After the modification, the second strip 10 is provided on both sides with a strip 5, 5 'of the first material, wherein the strips 5 and 5' of the same material or possibly also of different tear-resistant materials with respect to the second strip of high elasticity can exist. The strips 5 and 5 'may have the same or different widths. The adhesive layers 4, 4 'are each arranged on the laterally outside regions of the strips 5, 5' and are each covered by covering films 4a, 4a '. The strips 5 and 5 'are respectively arranged on the same side of the second strip, but they may, if appropriate, be arranged on opposite sides thereof.

Fig. 4 shows the application of a sealing strip according to the invention to a building, here by way of example sealing strips 200, 250, which with the sealing strip after Fig. 1 are identical (on the statements there are fully referenced), and this may apply accordingly for other sealing strips according to the invention.

The building 100 has two adjoining wall building areas 101, 102. In an area 101 of the wall structure, an outer lining element 110, such as a facade panel (alternatively also a frame component), a supporting structure 130 (for example a support or a masonry) and a thermal barrier layer 120 arranged between them is arranged. The thermal barrier coating abuts the cladding element in a front-side joint 103 (apart from the region of the sealing strip arranged between them). The thermal barrier coating is applied to a support structure 130, here this partially covering the area. The transition region 105 between cladding element and support structure, namely over the extension 121 of the thermal barrier coating between them, is covered by a sealing tape 200 and thus sealed, ie the end face 121 of the thermal barrier coating with adjacent side region 122 thereof, over which the sealing tape is pulled around. Further, the transition region 106 between the cladding element and thermal barrier coating and the transition region 107 between the thermal barrier coating and the support structure are covered by the sealing strip and thus sealed.

In another area 102 of the wall structure, an interior trim profile or covering element 140 of a window reveal and a supporting structure 130 and a thermal barrier layer 120 arranged between them (which is identical here with the above-mentioned thermal barrier layer 120, but need not be) are arranged. The thermal barrier coating lies flat against the support structure 130 on the window reveal cover 140 (apart from the region of the sealing tape arranged between the latter), covering them in each case in a partially planar manner. The transition region 105 between cladding element 140 and support structure 130, namely over the extension 122 of the thermal barrier coating between them, is covered by a sealing strip 250 and thus sealed, ie the end face 123 of the thermal barrier coating with adjacent side region 124 thereof, over which the sealing tape is pulled around. Further will be the transition region 108 between the cladding element and the thermal barrier coating and the transition region 109 between the thermal barrier coating and masonry area covered by the sealing strip and thus sealed.

The wall structure here has a room outside 100a and a room inside 100b. The arrangement of a heat-insulating layer as a wall-building area in combination with the sealing strip according to the invention is particularly preferred; instead of this, it is also possible for other wall-building areas to be made of other materials. The heat-insulating layer 120 is permeable to water vapor diffusion, for example in the form of a vapor-permeable or open-cell material, such as, for example, Mineral wool or plastic foam, which may generally be considered within the scope of the invention. Under cover of a surface area of the thermal insulation layer respectively new (front sides and / or side surfaces) through the sealing strip, these areas are also sealed flat, for example. Against draft, water spray, driving rain or the like.

In the case of the sealing strip 200, 250, the first strip 200a, 250a of the first material is disposed in the space outside and the second strip 200b, 250b is arranged in relation to the first strip in the interior. The first strip 200a, 250a respectively has a portion 200a-1 and 250a-1 which extends over the entire length of the first strip, in each case arranged closer to the space outside than the second strip of the respective sealing strip. The transition region 200c, 250c between the first and the second strip of the respective sealing strip 200, 250 is arranged on the inside of the space opposite the central region or the edge region of the first strip facing away from the second strip, that is to say further to the interior side than the middle region or the edge region of the first strip, which faces away from the second strip. The first strip of the respective sealing strip has a higher water and / or airtightness as the second strip of the same sealing tape.

The first strip is here adhered with the adhesive layer to the region of the wall structure. The first strip 200a, 250a of the sealing strips 200, 250 may each be fastened to a dimensionally stable wall region such as a cladding or frame element, optionally also to a wall region, for example the masonry region, by means of the corresponding adhesive / adhesive layer 200m, 250n, for example at the back of the same. The second strip 200b, 250b is preferably likewise fastened with an adhesive layer to this adjoining region of the wall-building region, and independently of this may rest substantially flat against the thermal-insulation layer. The second strip 200b, 250b of the respective sealing strip partially covers the wall area which is more permeable to water vapor diffusion, namely the heat-insulating layer and can rest against it. The second strip of the respective sealing strip can in this case each extend over a larger area or a larger area over the layer of wall building area (here the thermal barrier layer) that is more permeable to water vapor than via the less water vapor-permeable layer (the supporting structure or the covering part).

Particularly preferably, the second strip is arranged adjacent to or (directly) adjacent to a thermal barrier coating and covers these regions. The insulating layer may consist of a thermal insulation material such as polystyrene, polyurethane foam, mineral wool, fiberglass material, etc. The thermal barrier coating can be self-supporting. The insulating material has a thermal conductivity λ _R of about 0.06 W / mK.

The sealing tape can be adapted to the thermal barrier coating such that the water vapor diffusion resistance (s _D value) of the second layer of the sealing tape is smaller than the s _D value the thermal barrier coating is.

Fig. 5 shows the application of the sealing strip according to the invention according to Fig. 3 on a structure, the laterally outer strips 5, 5 'being fastened to a supporting structure or masonry area 500 by means of the adhesive layers 4, 4' of the strips 5, 5 'of the first material and the middle area of the sealing strip being made of the second strip 10 At the height of a water vapor diffusion open joint 510 is arranged. The joint 510 is sealed with a water vapor permeable joint sealant 520 such as a resilient foam strip.

Also the remarks to the FIGS. 4 and apply with respect to the two variants mentioned to the sealing strip according to the invention.

Claims (17)

1. Laminar sealing tape for sealing the region of a wall structure, for example, for covering the transition region of a support structure and an adjacent region of the wall structure, particularly of a façade, wherein the sealing tape has two longitudinal edges and is or can be provided with an adhesive, distributed in certain areas in the longitudinal direction of the tape, by which adhesive the sealing tape can be adhered to a structural element of the region of the wall structure, wherein the sealing tape has a first strip from an expandable and tear-resistant material (first material) that extends in the longitudinal direction of the tape, wherein the sealing tape further has a second strip that extends in the longitudinal direction of the tape, wherein relative to the width of the tape, said first strip and said second strip are juxtaposed at least in sections, wherein the first strip has a water vapor diffusion resistance which is at least 20% higher than that of the second strip, and wherein the second strip has an Sd value in the range of 0.01 m to 20 m, characterized in that the first strip has a tensile strength and/or an elongation at break higher than that of the second strip.
2. Laminar sealing tape according to claim 1, characterized in that the second strip includes or consists of a material (second material) which reversibly changes its vapor diffusion resistance with air humidity.
3. Laminar sealing tape according to claim 1 or 2, characterized in that the first strip consists of a material having a lower dependence of the water vapor diffusion resistance on air humidity than the second strip or substantially having no dependence of the water vapor diffusion resistance on air humidity.
4. Sealing tape according to one of the claims 1 to 3, characterized in that the first strip predominantly consists of a polyolefin material or rubber material.
5. Sealing tape according to one of the claims 1 to 4, characterized in that the second strip consists of a second material whose water vapor diffusion resistance decreases with an increasing air humidity.
6. Sealing tape according to one of the claims 1 to 5, characterized in that the second strip has an Sp value of 0.1 m to 20 m.
7. Sealing tape according to one of the claims 1 to 6, characterized in that the first strip has an Sp value of 20 m to 1000 m, the Sp value of the second strip being less than that of the first strip.
8. Sealing tape according to one of the claims 1 to 7, characterized in that the first strip has a tensile strength which is ≥ 20% higher than that of the second strip and/or that the first strip has an elongation at break which is ≥ 35% higher than that of the second strip.
9. Sealing tape according to one of the claims 1 to 8, characterized in that the first strip has a tensile strength in the region of 2-30 N/mm², according to DIN 7864-1, and/or that the first strip has an elongation at break in the region of 50 to 1000%, according to DIN 7864-1.
10. Sealing tape according to one of the claims 1 to 9, characterized in that on the first strip and/or on the second strip, there is disposed an adhesive layer for fixing the sealing tape to a region of a building.
11. Sealing tape according to one of the claims 1 to 10, characterized in that the sealing tape further includes a third strip that consists of an expandable and tear-resistant material, wherein the first, second and third strips run in the longitudinal direction of the sealing tape and wherein the second strip is arranged between the first and the second strips.
12. Sealing tape according to claim 11, characterized in that an adhesive is arranged on the first strip and on the third strip.
13. Building with two regions of a wall structure, for example, a support structure on the one side and an adjacent region of the wall structure on the other side, and with a laminar sealing tape covering the transition region between them, characterized in that the region to be sealed is sealed by means of a sealing tape according to one of the claims 1 to 12.
14. Building according to claim 13, characterized in that the first strip of the sealing tape is arranged on the building on the indoor side thereof, and the second sealing strip is arranged on the outdoor side thereof relative to the first strip.
15. Building according to one of the claims 13 or 14, characterized in that the first strip of the sealing tape is fixed, by means of the adhesive, to a profiled element of a wall covering or façade part, wherein the sealing tape is arranged on the region of the wall structure on the outdoor side thereof.
16. Building according to one of the claims 13 to 15, characterized in that the first strip of the sealing tape is fixed, by means of the adhesive, to a structural element of the region of the wall structure covering a thermal insulation layer.
17. Building according to one of the claims 13 to 16, characterized in that the second strip of the sealing tape is arranged in a manner such as to cover a region of a thermal insulation layer.

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