SEALING TAPE

Description

[0001] The present invention relates to a sealing tape with at least one base body made of soft foam that recovers after compression.

[0002] Such sealing tapes have been known for a long time and are used in particular for sealing joints between building components, especially frame profiles of windows or doors, and the building wall.

[0003] An example of such a sealing tape is known from WO 2009 / 138311 A1. In one embodiment, the sealing tape, in its fully expanded state, has a first height on its side flanks, while it has a second, lower height in a central region between the side flanks. Due to this configuration, the sealing tape, in a partially compressed installed state, is more compressed on the side flanks than in the central region, thereby achieving a higher contact pressure against the building wall on the side flanks than in the central region.

[0004] Furthermore, EP 3 513 954 A1 discloses a sealing tape in which V-shaped incisions are made in a fully expanded foam carrier. In these incisions, foil strips, adhesive tape strips, and / or an adhesive-like medium are inserted, which act as a barrier layer in the foam carrier.

[0005] EP 2 784 231 A1 also discloses a sealing strip formed with a depression of lower height between respective side flanks. The sealing strip is impregnated to varying degrees in the areas of different heights, ensuring a uniformly rapid recovery of the sealing strip despite the height profile.

[0006] The object of the present invention is to provide a sealing tape which is simple and cost-effective to produce, which produces little waste during production and which provides a higher contact pressure against the building wall in the area of ​​the side flanks than in an area between the side flanks.

[0007] This problem is solved by the features of claim 1.

[0008] According to the invention, the sealing tape comprises at least one base body made of soft foam that recovers after compression. The sealing tape has a top side, a bottom side, and a first and a second side flank that connect the top and bottom sides. The side flanks extend substantially perpendicular to a functional direction of the sealing tape. An adhesive layer is arranged in the region of the bottom side for adhesion to a component, in particular a frame profile of a window or door.The upper side of the sealing strip has a profile with at least one depression such that the sealing strip, in a fully expanded state, has a first height in the region of the first side flank, a second height in the region of the second side flank, and a third height in a region between the first and second side flanks that is less than the first and second heights, wherein an interior of the depression is filled exclusively with air in the fully expanded state of the sealing strip. The first height of the sealing strip in the fully expanded state is between 5 and 150 mm, and the second height of the sealing strip in the fully expanded state is between 5 and 150 mm. The lower third height in the fully expanded state of the sealing strip is achieved at least partially by permanent compression and / or fusion of the foam of the at least one base body.

[0009] The interior of the depression is defined herein as the space bounded by a section of the upper side of the sealing strip that is curved in the region of the depression and an imaginary extension of a flat section of the upper side of the sealing strip in the region of a side flank over the curved region.

[0010] The height of the sealing tape is defined in a direction between the top and bottom of the sealing tape and perpendicular to the functional direction of the sealing tape, preferably parallel to the side flanks.

[0011] The region of the lower third height is formed by a section of the at least one base body in which the foam of the at least one base body is permanently compressed and / or fused. The lower third height is thus also achieved in the fully expanded state of the sealing tape.

[0012] Preferably, the sealing tape has a continuous barrier structure for reducing water vapor diffusion and / or air permeability in the functional direction, extending from the top to the bottom and at least partially through the region of the third height. This extends the functionality of the sealing tape, while sensitive parts of the barrier structure are protected from damage by external influences during transport or handling.

[0013] In a preferred embodiment, the first and second heights are substantially equal. This results in identical contact pressure of the sealing tape against the building wall on both sides.

[0014] In a preferred embodiment, the third height is between 2 and 95%, more preferably between 3 and 80%, more preferably between 5 and 50% of the first height.

[0015] Preferably, the barrier structure is partially formed by a permanently compressed and / or fused portion of the at least one base body. In this way, the compression and / or fusion of the at least one base body not only creates the desired surface profile of the sealing tape, but also achieves an additional sealing effect.

[0016] Alternatively or additionally, the barrier structure may be partially formed by a barrier layer arranged on the upper side of the at least one base body.

[0017] In a preferred embodiment, the barrier layer arranged on the upper side of the at least one base body comprises or is formed from essentially closed-cell flexible foam. This provides the advantage that the flexible foam adheres particularly elastically to the building wall, thus preventing the formation of air channels and / or water vapor diffusion channels between the sealing tape and the building wall in the functional direction.

[0018] It is preferred that the barrier layer arranged on the upper side of the at least one base body be permanently compressed and / or fused in the region of the third height of the sealing strip. This is particularly advantageous if the permanent compression and / or fusion of this barrier layer occurs during the manufacturing process together with the compression and / or fusion of the material of the base body.

[0019] It is also preferred that the barrier structure is partially formed by a barrier layer arranged on the underside of the at least one base body.

[0020] This barrier layer may be formed by the adhesive layer or may comprise or be formed from substantially closed-cell flexible foam.

[0021] In particular embodiments, it may be preferred for the barrier layer arranged on the underside of the at least one base body to be permanently compressed and / or fused in the region of the third height of the sealing tape. This is particularly useful if the compression and / or fusion takes place in a single manufacturing step together with the compression and / or fusion of the material of the base body and / or the compression and / or fusion of a barrier layer arranged on the top side of the sealing tape.

[0022] In a preferred embodiment of the sealing strip, the region of the third height is arranged substantially centrally between the two side flanks.

[0023] Preferably, the depression extends over a range of 2 to 60%, more preferably 5 to 40% of the total width of the sealing tape.

[0024] In preferred embodiments, the sealing tape has exactly one integral base body made of soft foam.

[0025] In this case, a bottom surface of the base body in the fully expanded state of the sealing tape is flat, or the bottom surface of the base body in the fully expanded state of the sealing tape can have a profile with at least one lower depression which is aligned towards the top side of the sealing tape and is opposite the at least one depression on the top side in the region of the third height.

[0026] In certain embodiments, the adhesive layer is flat when the sealing tape is fully expanded. Alternatively, the adhesive layer can have a hill-shaped profile when the sealing tape is fully expanded, essentially following the shape of the lower depression. In the latter case, the adhesive layer is essentially continuously adhered to the underside of the sealing tape.

[0027] In all of the preceding embodiments, it is preferred that the compression and / or fusion of the base body, more preferably additionally also the compression and / or fusion of the barrier layer on the upper side, more preferably additionally also the compression and / or fusion of the barrier layer on the underside, is achieved by means of gluing, sewing, lamination or melting. In this way, the compression and / or fusion can be permanently produced without the need for additional elements in the region of the depression on the upper side of the sealing tape. All of the above-mentioned methods of compression and / or fusion can be carried out simultaneously for the individual superimposed layers, i.e., in a single work step.

[0028] In general, the height of the permanently compressed and / or fused portion of all layers involved in the fully expanded state of the sealing tape is preferably 2 to 50%, more preferably 3 to 40%, particularly preferably 5 to 30% of the first height.

[0029] As an alternative to the embodiments with one base body, the sealing tape can also have two base bodies made of soft foam, which are arranged next to one another in the functional direction of the sealing tape, wherein the region with the third height is formed in a transition region between the two base bodies and the lower third height is achieved by a permanent compression of one of the base bodies near the transition region to the other base body.

[0030] As an alternative to the latter embodiment, the sealing tape can also comprise two base bodies made of soft foam, which are arranged next to one another in the functional direction of the sealing tape, wherein the region with the third height is formed in a transition region between the two base bodies, wherein the lower third height is achieved by a permanent compression of the two base bodies near the transition region between the two base bodies.

[0031] In the last two alternative embodiments with two base bodies, the compression of one or the two base bodies is preferably achieved using a casing which surrounds the respective base body on the top side, the bottom side and the side facing the other base body.

[0032] In this case, the compression can additionally be promoted by a bending of a first leg of the base body relative to a second leg of the base body by 180°, wherein the bending point is arranged in the transition area to the other base body and wherein the foam material of the base body is compressed in the area of ​​the bending point due to the bending.

[0033] Preferably, the first and second legs are adhered to one another at their superimposed surfaces, particularly preferably glued or laminated to one another.

[0034] It is preferred if the sheath forms at least part of the barrier structure, preferably the entire barrier structure.

[0035] In preferred embodiments, the sheathing can essentially comprise or be formed from closed-cell flexible foam. This ensures a tight seal between the top side of the sealing tape and the building wall due to the elasticity of the closed-cell flexible foam.

[0036] It is preferred that the two adjacent base bodies be permanently bonded together in the transition area. This achieves greater stability of the sealing tape.

[0037] The first height and / or the second height of the sealing tape in the fully expanded state is preferably between 10 and 100 mm in all embodiments.

[0038] The third height of the sealing tape in the fully expanded state is in all embodiments preferably between 1 and 142 mm, more preferably between 2 and 95 mm.

[0039] In all embodiments, the width of the sealing tape is preferably between 10 and 500 mm, more preferably between 10 and 150 mm.

[0040] The degree of compression of the first and / or second side flank in the compressed state on the sealing tape roll is preferably between 3 and 50%, more preferably between 5 and 25%, compared to the fully expanded state. The degree of compression here refers to the percentage height in the compressed state compared to the height in the fully expanded state.

[0041] In an installed state, the sealing tape is arranged in a structural section. The structural section comprises a wall and a component inserted into an opening in the wall, with the sealing tape being arranged in a joint between the component and the wall and sealing the joint. The sides of the sealing tape face an interior or exterior of the room, respectively, and the sealing tape is preferably bonded to the component by means of the adhesive layer in the area of ​​the underside of the sealing tape. Compared to the uncompressed or fully expanded state of the sealing tape, the sealing tape is partially compressed in the installed state.In this partially compressed installation state, the upper side of the sealing tape rests against the wall in the area of ​​the side flanks of the sealing tape, while the upper side of the sealing tape, at least in the area of ​​the original third height, does not rest against the wall or rests against the wall with a lower contact pressure than in the area of ​​the side flanks of the sealing tape.

[0042] The degree of compression of the first and / or second side flank in the partially compressed installed state is preferably between 5 and 90%, more preferably between 10 and 70%, compared to the fully expanded state. The degree of compression here refers to the percentage height in the partially compressed state compared to the height in the fully expanded state.

[0043] The foam of the sealing tape can be made of any open-cell or mixed-cell flexible foam, such as polyurethane, polyethylene, polyvinyl chloride, polyolefin, or polypropylene. The density of such flexible foams ranges between 15 and 200 kg / m³.

[0044] The foams described herein can also be designed such that they have a skin on an outer surface. This applies both to the at least one base body made of flexible foam and to the barrier structure (e.g. barrier layer or sheath), which in one embodiment can comprise a closed-cell foam or is formed from such a foam. Such a skin is an integral component of the respective foam, but has increased sealing properties compared to the rest of the foam and can protect it from external influences. For example, the skin can ensure that the foam is essentially waterproof. Nevertheless, the skin has the necessary flexibility to enable the best possible fit against a wall surface. A corresponding skin on at least one of the top side, bottom side or side flank of the at least one base body can therefore optionally form part of the barrier structure.The skin can be created during the production of the respective foam. However, it can also be formed during the application of additional components, such as during the lamination of a closed-cell foam onto at least one base body. A skin can be created particularly well with polyurethane foams.

[0045] If multiple base bodies are present, the individual base bodies of the sealing tape are preferably made of the same material. Alternatively, the individual base bodies can be made of different materials.

[0046] More than two basic bodies can also be arranged next to each other.

[0047] The at least one base body is preferably at least partially and preferably completely impregnated with an impregnating agent for delayed recovery. The impregnating agent preferably comprises an acrylate dispersion. In an advantageous embodiment, the acrylate dispersion comprises acrylate polymer particles dispersed in a homogeneous phase. Particularly preferably, the foam of the base body is impregnated with a weight fraction of acrylate dispersion for delayed recovery such that the sealing tape recovers from a compression ratio of approximately 9% to 13% to the joint closure in less than 24 hours at 20°C and 50% relative humidity.

[0048] The air permeability of the flexible foam of the at least one base body is preferably between 50 and 1,000 l / (m 2 < s), more preferably between 60 and 600 l / (m 2 < s), and particularly preferably between 80 and 400 l / (m 2 < s). All information regarding air permeability provided in this application refers to a determination under standard conditions of a 10 mm thick foam piece (fully expanded) at a measuring vacuum of 1.0 bar, test area 100 cm 2 < ; Frank device 21443; DIN EN ISO 9237:1995.

[0049] The flexible foam of the at least one base body preferably has a compression hardness of more than 2 kPa. The compression hardness is preferably more than 2.1 kPa, more preferably more than 2.2 kPa, particularly preferably more than 2.3 kPa. The compression hardness is preferably less than 4 kPa, preferably less than 3.8 kPa, and more preferably less than 3.6 kPa. The compression hardness is a measure of the strength of the foam. The values ​​specified here are based on a compression of 40% compared to the initial height. The compression hardness is determined according to DIN EN ISO 3386:2015; the CV40 is specified.

[0050] Particularly preferably, each barrier layer or covering comprises a substantially closed-cell flexible foam or is formed exclusively from it. The closed-cell foam is preferably not impregnated. For the purposes of this application, closed-cell foam is understood to mean a flexible foam that has a high number of closed cells or cells with only a small opening cross-section. The closed-cell foam is characterized exclusively by its air permeability. For the purposes of this application, the air permeability of a closed-cell foam is at most 50 l / (m 2 < s), or more preferably at most 40 l / (m 2 < s), or more preferably at most 30 l / (m 2 < s), or more preferably at most 20 l / (m 2 < s), measured according to DIN EN ISO 9237:1995; test area 100 cm 2 < at a measuring pressure (negative pressure) of 1.0 mbar, test device Frank 21443.

[0051] Each barrier layer or covering described in this application can also be formed from a film-like material or an adhesive, in particular from a film strip, an adhesive strip, or an adhesive-like liquid medium. More specifically, each barrier layer or covering described herein can be formed from a film made of polyamide, polyurethane, polypropylene, or copolymers thereof. Likewise, each barrier layer or covering can also be formed from a dispersion adhesive, in particular an acrylate adhesive or another suitable pressure-sensitive adhesive.

[0052] In all embodiments, each barrier layer or covering can be formed from multiple layers, for example from any combination of several of the above-mentioned materials. It can also have a membrane layer and / or nonwoven layer, for example. In particular, each barrier layer or covering can be formed as a multi-layer composite layer. At least one layer of at least one further material can be arranged on one or both sides of the functional layer. The one or two further layers, which each partially or completely cover the functional layer, can protect and carry or support it and increase the stability of the barrier layer or covering. The individual layers can each be made of the same or different materials.

[0053] The layers arranged on one or both sides can be nonwovens, woven fabrics, or meshes made of inert materials such as polyethylene, polyurethane, polypropylene, polyester, glass fibers, or viscose, and optionally also perforated films, especially those made of polyethylene, polyurethane, polypropylene, or polyester. The layers can generally consist of any suitable material in layered form, preferably with a sD value that is not higher than the functional layer. The layers arranged on one or both sides can consist of a dispersion adhesive, in particular an acrylate adhesive.

[0054] If there is an upper and a lower barrier layer, they can be made of the same material or different materials. Each barrier layer or enclosure can also consist of different sections made of different materials.

[0055] All of the materials mentioned for the barrier layer or covering can be applied to and bonded to the flexible foam of any base body with particular ease and control. Furthermore, these materials are particularly well-suited as barrier structural materials because their sealing properties can be precisely adjusted.

[0056] Jede Sperrschicht or coating has a thickness of 1 µm to 5 mm, preferably from 10 µm to 3 mm, particularly preferably from 50 µm to 2 mm.

[0057] Within the scope of the invention, each barrier layer or covering preferably forms a continuous, non-porous, and non-perforated layer. The air permeability of each barrier layer or covering is preferably in the range of 0.01-50 l / (m 2 < s), more preferably in the range of 0.01-20 l / (m 2 < s). The air permeability is preferably ≤ 3-6 l / (m 2 < s) or preferably ≤ 1-2 l / (m 2 < s) or ≤ 0.2-0.5 l / (m 2 < s) or particularly preferably ≤ 0.1-0.3 l / (m 2 < s) according to DIN EN ISO 9237:1995; Test area 100 cm 2< at a measuring pressure (negative pressure) of 1.0 mbar, test device Frank 21443, or is no longer measurable.

[0058] The water vapor diffusion resistance of a sealing tape is characterized by the water vapor diffusion value relative to an air layer thickness in meters, the so-called sD value. Each barrier layer or covering preferably has an sD value of 0.02 m to 100 m, more preferably from 0.1 m to 25 m or from 0.2 m to 15 m (at 25% relative humidity). The sD value is tested according to DIN EN ISO 12572:2001. Independently of this or in combination with this, each barrier layer or covering can have an sD value of 0.02 m to 10 m, 0.03 m to 6 m, or 0.05 m to 2 m at 72.5% relative humidity, according to DIN EN ISO 12572:2001. For example, the sD value can range from 1 to 10 m at 25% relative humidity and from 0.1 to 5 m at 72.5% relative humidity. Unless otherwise specified in DIN EN ISO 12572:2001, the sD values ​​refer to a temperature of 20°C.

[0059] Each barrier layer or covering can also be designed to be humidity-variable, i.e. its water vapor diffusion resistance changes depending on the humidity of the environment of the barrier layer.

[0060] The following relationships apply to each sealing tape according to the invention. The decisive factor for the air permeability of a sealing tape section is generally the overall reduction in an air flow in one direction across the entire cross-section of the sealing tape section. If, for example, a plurality of barrier structure sections and base bodies are arranged alternately in the height direction or in the functional direction of the sealing tape, the reduction in air flow through all of these barrier structure sections and base bodies must be taken into account. The air permeability of the entire sealing tape in the functional direction is preferably less than 50 l / (m 2 < s), more preferably less than 40 l / (m 2 < s), more preferably less than 30 l / (m 2 < s), more preferably less than 20 l / (m 2 < s), more preferably less than 10 l / (m 2 < s), more preferably less than 5 l / (m 2 < s), under the measurement conditions specified above.

[0061] In one embodiment, the sealing tape further comprises an additional material that is applied to a surface of the at least one base body and / or to a barrier layer or casing and / or is contained in the impregnate of the at least one base body. The additional material can impart special properties to the sealing tape. Suitable additional materials include, in particular, materials for fire protection (e.g., expandable graphite, non-combustible solids, CO2 emitters, etc.), materials for insulation (e.g., PU foam, resins, sealants, etc.), materials for sealing against moisture (e.g., hydrophobic or hydrophilic substances, substances that swell upon contact with water, etc.), materials for sound insulation, materials for controlled ventilation (e.g., catalysts, etc.), materials for hygiene (e.g., disinfectants, etc.), and / or materials for triggering the expansion of the sealing tape (e.g., propellants, heat sources, etc.).The person skilled in the art will be able to identify alternatives with regard to the arrangement as well as the type and properties of the additional material that can be used to meet the respective requirements.

[0062] Further features and advantages of the present invention will become apparent from the following description with reference to the drawings. Fig. 1 is a schematic cross-sectional view of a first embodiment of a sealing tape according to the invention in a fully expanded state; Fig. 2 is a schematic perspective view of the sealing tape wound into a sealing tape roll from Fig. 1 ; Fig. 3 is a schematic cross-sectional view of a second embodiment of the sealing tape according to the invention in a fully expanded state; Fig. 4 is a schematic cross-sectional view of a further embodiment of the sealing tape according to the invention in a fully expanded state; Fig. 5 is a schematic cross-sectional view of a further embodiment of the sealing tape according to the invention in a fully expanded state; Fig. 6 is a schematic cross-sectional view of a further embodiment of the sealing tape according to the invention in a fully expanded state; Fig. 7 is a schematic cross-sectional view of a further embodiment of the sealing tape according to the invention in a fully expanded state; Fig. 8 is a schematic cross-sectional view of a further embodiment of the sealing tape according to the invention in a fully expanded state;Fig. 9 is a schematic cross-sectional view of another embodiment of the sealing tape according to the invention in a fully expanded state; Fig. 10 is a schematic cross-sectional view of another embodiment of the sealing tape according to the invention in a fully expanded state; Fig. 11 is a schematic cross-sectional view of an installation situation of the sealing tape from . Fig. 1 , in which the sealing tape is arranged in a partially compressed installation state in a joint between a component and a wall; and Fig. 12 is a schematic cross-sectional view of an installation situation of the sealing tape from Fig. 8 in which the sealing tape is arranged in a partially compressed installed state in a joint between a component and a wall.

[0063] The Fig. 1 The sealing tape 2 shown in cross-section comprises a base body 4 made of soft foam that recovers upon compression and is preferably impregnated for delayed recovery. The base body 4 is originally designed as a single piece, but is flatter in a central region than in the areas to the right and left of it due to permanent compression and / or fusion of the material of the base body 4.

[0064] The sealing tape 2 shown has a top side 6, a bottom side 8, and two side flanks 10 connecting the top side 6 and bottom side 8. The side flanks 10 extend essentially perpendicular to a functional direction F of the sealing tape, in which the sealing tape is intended to seal a joint against air penetration and / or water vapor diffusion in the later installed state.

[0065] In the area of ​​the underside 8, an adhesive layer 12 is arranged, which in the example shown is flat and is used to adhere to a component 14 (see Fig. 11 ), for example a frame profile of a window or a door. The adhesive layer 12 is preferably designed as a double-sided adhesive tape and is bonded on its upper side to the adjacent areas of the sealing tape. The adhesive surface of the adhesive layer 12 which is used for attachment to the component 14 is directed downwards and is usually covered by a release film or release paper which can be removed before use. In the example shown, it is also conceivable for the adhesive layer 12 to be sticky on the upper side only in those areas in which it comes into contact with areas of the sealing tape.

[0066] The upper side 6 of the sealing strip 2 has a profile with a depression 16 in a central region between the side flanks 10 of the sealing strip 2. An interior space of the depression 16 is filled exclusively with air. In the region of the depression 16, the upper side 6 of the sealing strip 2 is curved. In the region of the side flanks 10, the upper side 6 of the sealing strip is essentially flat. The interior space of the depression 16 is defined as the space bounded by the curved section of the upper side 6 and an extension of the essentially flat section of the upper side 6 beyond the depression 16.

[0067] In the region of the first (right) side flank 10, the sealing strip in the fully expanded state has a first height h 1 , which corresponds to the height h 2 of the second (left) side flank 10. At the apex of the depression 16, however, the sealing strip in the fully expanded state has a third height h 3 , which is less than the first height h 1 and less than the second height h 2 . The lower third height h 3 in the fully expanded state of the sealing strip is achieved at least partially by a permanent compression and / or fusion of the material of the base body 4.

[0068] The bottom surface of the base body 4 has a profile with a lower depression 28 which is aligned in the direction of the upper side 6 of the sealing strip and is opposite the depression 16 on the upper side 6 in the region of the third height h 3.

[0069] The Fig. 1 The sealing tape 2 shown also has a continuous barrier structure 18 for reducing water vapor diffusion and / or air permeability in the functional direction F of the sealing tape, which barrier structure extends from the upper side 6 to the lower side 8 and at least partially through the region of the third height h 3.

[0070] In other embodiments, the height h 1 may also be different from the height h 2 , as long as both heights h 1 , h 2 are greater than the height h 3 .

[0071] In the Fig. 1 In the illustrated embodiment, the barrier structure 18 comprises several sections that together form the continuous barrier structure 18. First, the sealing tape has a barrier layer 20 on the upper side 6. This barrier layer 20 runs from the first to the second side flank 10 and covers the entire surface of the base body 4 of the sealing tape. Preferably, the barrier layer 20 is glued to the base body 4 or laminated to it.

[0072] Likewise, the sealing tape 2 has a further barrier layer 22 in the area of ​​the underside of the base body 4, which also runs from the first to the second side flank 10 and preferably covers the base body 4 continuously. The barrier layer 22 is preferably permanently bonded to the base body 4 or laminated thereto. The barrier layers 20, 22 thus form symmetrically formed boundaries of the base body 4 on its top and bottom sides, respectively.

[0073] A third component of the barrier structure 18 is the permanently compressed and / or fused section 24 of the sealing strip in the region of the depression 16. In this region, the barrier layer 20 arranged on the upper side 6, the barrier layer 22 arranged on the lower side 8, and the material of the base body 4 are jointly compressed and / or fused, thereby achieving the lower third height h 3 of the sealing strip. Due to the compression and / or fusion of the various layers in this region, a sealing connection is established between the upper barrier layer 20 and the lower barrier layer 22.

[0074] Compression and / or fusion can be achieved in this area, for example, by bonding after compression, by sewing, by lamination with simultaneous compression, or by melting (with or without compression). In any case, the higher compression and / or the higher material density in the compressed / fused area ensures that the airtightness of the sealing tape or the water vapor diffusion resistance in functional direction F are significantly increased in this section 24. The material of the base body 4 can be so strongly compressed or fused with the materials of the barrier layers 20, 22 that it can no longer be visually distinguished from the barrier layers 20, 22.

[0075] The continuous barrier structure 18, formed from the upper barrier layer 20, the compressed / fused section 24 and the lower barrier layer 22, thus extends (apart from the adhesive layer 12) over the entire height of the sealing tape and thus ensures a gapless seal, adjusted to a desired level, against air penetration and / or water vapor diffusion in the functional direction F over the entire height.

[0076] In the illustrated embodiment, it is also conceivable not to design the adhesive layer 12 continuously over the entire width of the sealing tape 2, but to provide it only in strip form in the areas in which it is to be adhered to the other elements of the sealing tape.

[0077] In Fig. 2 the sealing tape 2 is made of Fig. 1 shown in a configuration wound up into a sealing tape roll 26. The sealing tape is in a compressed state in which the top side 6 and the bottom side 8 of the sealing tape run essentially in a straight line and the depression 16 is significantly less pronounced than in the fully expanded state. The sealing tape 2 is wound up into the sealing tape roll 26 in such a way that the bottom side 8 of the sealing tape 2 of one turn rests against the top side 6 of the sealing tape 2 of an adjacent turn and the side flanks 10 of the sealing tape 2 form end faces of the sealing tape roll 26. For all other embodiments of the sealing tape according to the invention, the configuration as a sealing tape roll 26 is likewise preferred and the same relationship applies.

[0078] The Fig. 3 The sealing tape 2 shown differs from the sealing tape from Fig. 1 in that the adhesive layer 12 adheres completely to the lower barrier layer 22 and thus has a profile with a hill shape which corresponds to the profile of the bottom surface of the base body 4 with the lower depression 28.

[0079] In the Fig. 3 In the illustrated embodiment, only the upper barrier layer 20, the base body 4, and the lower barrier layer 22 are compressed or fused together in the area of ​​the compressed / fused section 24, while the adhesive layer 12 is subsequently applied to the sealing tape as a separate strip. It is also conceivable for the adhesive layer 12 to become a component of the compressed / fused section 24 and to also be compressed and / or fused with the other components of the sealing tape present in this area. In this case, the compression / fusion only occurs after the adhesive layer 12 has been applied.

[0080] It is also conceivable that in the embodiment according to Fig. 3 the lower barrier layer 22 is omitted and the adhesive layer 12 takes over the function of the lower barrier layer. In this case, it must be ensured that the adhesive layer 12 has properties that reduce air penetration or water vapor diffusion to the desired extent. In this case, the barrier structure 18 would be formed by the upper barrier layer 20, the compressed / fused section 24, and the adhesive layer 12.

[0081] The Fig. 4 The embodiment of the sealing tape 2 according to the invention shown differs from the embodiment of Fig. 1 in that the upper barrier layer 20 only runs from one side flank 10 to the compressed / fused section 24, and that the lower barrier layer 22 also only runs from the compressed / fused section 24 to one side flank 10, preferably to the other side flank 10 of the sealing tape than the upper barrier layer 20. This configuration is sufficient to form a continuous barrier structure 18 composed of the upper barrier layer 20, the compressed / fused section 24, and the lower barrier layer 22. Because these components cover the entire height of the sealing tape across its cross-section, a reduction in air permeability or water vapor diffusion in the functional direction F of the sealing tape, which can be adjusted to a desired level, is ensured.It is also possible for only one of the two barrier layers 20, 22 to extend between one side flank 10 and the section 24 and for the other of the two barrier layers 20, 22 to extend completely between both side flanks 10.

[0082] The Fig. 5 The embodiment of the sealing tape 2 according to the invention shown in FIG. 1 differs from that shown in FIG. Fig. 1 The illustrated embodiment is distinguished by the fact that no upper barrier layer 20 and no lower barrier layer 22 are provided. Thus, this embodiment of the sealing tape also does not have a continuous barrier structure 18. The compressed / fused section 24 of the sealing tape consists solely of the material of the base body 4.

[0083] Due to the recess 16 being filled solely with air, this sealing tape has the advantage over sealing tapes with a rectangular cross-section in that it offers greater thermal insulation due to the larger amount of air arranged in the central region of the sealing tape. This advantage is also offered by all other listed versions of the sealing tape with a recess 16 on the top side 6.

[0084] The Fig. 6 The embodiment of the sealing tape 2 according to the invention shown differs from the embodiment of Fig. 1 in that two compressed / fused sections 24 are provided across the width of the sealing strip. Between these sections 24, a region of the base body 4 with a substantially oval cross-section is arranged, which is preferably surrounded on the top and bottom by the barrier layers 20, 22.

[0085] It is also possible to provide more than two compressed / fused sections 24 across the width of the sealing strip. Likewise, in all embodiments, it is conceivable to arrange the compressed / fused section(s) 24 asymmetrically across the width of the sealing strip.

[0086] The Fig. 7 The embodiment of the sealing tape 2 according to the invention shown differs from the embodiment of Fig. 6 in that a bottom surface of the base body 4 is substantially flat and is fully bonded to the adhesive layer 12. In addition, the shape of the depressions 16 can be substantially V-shaped, and the compressed / fused sections 24 are located, with respect to the height of the sealing tape, not in a central region of the sealing tape, but in a lower region of the sealing tape. Such modifications of the depression 16 or the compressed / fused section 24 are also conceivable in all other embodiments described above. Likewise, the shape of the depressions 16 can also be Fig. 7 the shape in the other embodiments, e.g. Fig. 1 and 3 bis 6 , are equivalent to.

[0087] In addition, the lower barrier layer 22 is omitted in the example shown, but it could also be included in the embodiment of the Fig. 7 be supplemented.

[0088] The Fig. 8 The illustrated embodiment of the sealing tape 2 according to the invention comprises two base bodies 4 made of soft foam which recovers after compression, which are preferably impregnated for delayed recovery and are arranged next to one another as viewed in the functional direction F of the sealing tape.

[0089] The sealing tape 2 has a top side 6, a bottom side 8, and two side flanks 10 connecting the top side 6 and bottom side 8. The side flanks 10 extend essentially perpendicular to a functional direction F of the sealing tape, in which the sealing tape is intended to seal a joint against air penetration and / or water vapor diffusion in the later installed state.

[0090] In the area of ​​the underside 8, an adhesive layer 12 is arranged, which in the example shown is flat and is used to adhere to a component 14 (see Fig. 12 ), for example a frame profile of a window or a door. The adhesive layer 12 is preferably designed as a double-sided adhesive tape and is bonded on its upper side to the adjacent areas of the sealing tape. The adhesive surface of the adhesive layer 12 which is used for attachment to the component 14 is directed downwards and is usually covered by a release film or release paper which can be removed before use. In the example shown, it is also conceivable for the adhesive layer 12 to be sticky on the upper side only in those areas in which it comes into contact with areas of the sealing tape.

[0091] The upper side 6 of the sealing strip has a profile with a depression 16 in a central region of the sealing strip. An interior space of the depression 16 is filled exclusively with air. In the region of the first (right) side flank 10, the sealing strip, in the fully expanded state, has a first height h 1 , which corresponds to the height h 2 of the second (left) side flank 10. At the apex of the depression 16, however, the sealing strip, in the fully expanded state, has a third height h 3 , which is less than the first height h 1 and less than the second height h 2 .

[0092] The region with the third height h 3 is formed in a transition region 36 between the two base bodies 4. In the example shown, the two base bodies 4 are each created by bending a molded body that is essentially rectangular in cross-section, with a first, upper leg 30 of the base body 4 being bent by 180° relative to a second, lower leg 32 of the base body 4. The bending point is arranged in the transition region 36 to the other base body 4, and the foam material of the base body 4 is compressed in the region of the bending point due to the bending.

[0093] The first and second legs 30, 32 can be bonded together at their mutually abutting surfaces, preferably glued or laminated together. This results in a substantially horizontally extending bonding surface between the legs 30, 32.

[0094] Each of the two base bodies 4 has a sheath 34 surrounding it on the top side, the bottom side, and the side facing the other base body 4. Depending on the rigidity of this sheath 34, the sheath 34 can additionally contribute to the compression of the material of the base body 4 in the area of ​​the bending point. The adhesive layer 12 is firmly bonded to the underside of both sheaths 34.

[0095] It is preferred if the enclosure 34 forms a barrier structure 18 which meets the same requirements as those previously described under Fig. 1 described barrier structure 18. Each covering 34 forms a continuous barrier structure 18 which, viewed across the width of the sealing tape, covers the entire height of the sealing tape and can thus reduce the air permeability or water vapor penetration in the functional direction F of the sealing tape to the desired extent.

[0096] The two adjacent base bodies 4 are, in the present case with the interposition of the respective sections of the sheaths 34, permanently bonded to one another in the transition region 36, e.g. by means of an adhesive surface 37 between the sheaths 34.

[0097] As a result, a substantially V-shaped depression 16 is formed in the region of the upper side 6 of the sealing strip, and likewise, in the region of the underside 8 of the sealing strip, a further substantially V-shaped depression 28 opposite the depression 16 is formed in the region of the lower third height h 3.

[0098] The Fig. 9 The embodiment of the sealing tape 2 according to the invention shown differs from the embodiment of Fig. 8 in that only one of the base bodies 4 corresponds to one of the two base bodies 4 Fig. 8 The other base body 4 is also made of soft foam, but with a rectangular cross-section. The cutout can also have a different geometric shape.

[0099] In this case, the continuous barrier structure 18 is formed solely by the sheath 34 of the first base body 4. In the transition region 36, the two base bodies 4 merely abut one another, but they can also be bonded together.

[0100] The height of the two base bodies 4 is preferably identical, but can also be different, as long as the third height h 3 in the transition area 36 is lower than in the area of ​​each of the two side flanks 10 of the sealing strip. The arrangement of the two base bodies 4 with respect to the functional direction F can be Fig. 9 also be the other way around.

[0101] The design of the sealing tape 2 according to Fig. 10 differs from the embodiment of Fig. 8 in that the two base bodies 4 each consist of a rectangular cut-out in cross-section and are not bent over. The compression of the two base bodies 4 near the transition region 36 is thus brought about exclusively by the adhesion of the two coverings 34 in the transition region 36 and the rigidity of the covering 34. To form the depression 16 and, if applicable, the depression 28, it is therefore essential that the adhesive surface 37 between the coverings 34 has a lower height than the first or second height h 1 , h 2 on the side flanks 10 of the sealing tape. Due to the rigidity of the covering 34, each base body 4 is then compressed more strongly near the transition region 36 than when it is fully expanded in the region of the side flanks 10.

[0102] It is also possible to use a Fig. 10 designed base body 4 with a conventional base body 4 with a rectangular cross-section without a casing 34.

[0103] In the embodiments according to Fig. 8 , Fig. 9 und Fig. 10 More than two base bodies 4 can also be arranged next to each other and connected to each other.

[0104] There are numerous possible combinations or modifications of the individual embodiments. All such combinations are intended to be disclosed here, as long as they fall within the scope of the appended claims.

[0105] In Fig. 11 is an installation situation of the sealing tape 2 from Fig. 1 shown. Here, in a building section 42, the sealing strip 2 is arranged in a joint 38 between a component 14, in particular a frame profile of a window or a door, and a wall 40 in a partially compressed installed state and seals the joint 38. As indicated by the dashed lines, the upper side 6 of the sealing strip 2 rests against the wall 40 in the region of the side flanks 10 of the sealing strip, while the upper side 6 does not rest against the wall 40 at least in the region of the original third height h 3 and in adjacent areas (between the dashed lines). However, it is also conceivable for the third height h 3 to be significantly larger and for the upper side 6 of the sealing strip 2 to thus also rest against the wall 40 in the region of the original third height h 3, albeit with a lower contact pressure than in the region of the side flanks 10 of the sealing strip.

[0106] In Fig. 12 is a corresponding installation situation of the sealing tape 2 from Fig. 8 In this case, the sealing tape 2 in the structural section 42 is compressed so strongly between the component 14 and the wall 40 that the upper side 6 also rests against the wall 40 in the region of the original third height h 3 as well as in adjacent areas (between the dashed lines), but there with a lower contact pressure than in the region of the side flanks 10 of the sealing tape.

Claims

1. A sealing tape (2) which has at least one main body (4) produced from flexible foam which can recover following compression, wherein the sealing tape has an upper side (6), a lower side (8) and a first and a second side flank (10) which connect the upper side (6) and lower side (8), wherein the side flanks (10) extend substantially perpendicular to a functional direction (F) of the sealing tape (2), wherein an adhesive layer (12) is disposed in the region of the lower side (8) for adhesion to a building component (14), in particular a frame profile of a window or a door, wherein the upper side (6) of the sealing tape (2) has a profile with at least one depression (16) such that in a fully expanded state, the sealing tape (2) has a first height (h1) in the region of the first side flank (10), a second height (h2) in the region of the second side flank (10) and a third height (h3) in a region between the first and second side flank (10) which is smaller than the first height (h1) and smaller than the second height (h2), wherein the first height (h1) of the sealing tape in the fully expanded state is between 5 and 150 mm and the second height (h2) of the sealing tape in the fully expanded state is between 5 and 150 mm, and wherein an inner space of the depression (16) is exclusively filled with air in the fully expanded state of the sealing tape (2), in the fully expanded state of the sealing tape (2), the smaller third height (h3) is obtained at least in part by a permanent compression and / or fusion of the foam of the at least one main body (4).

2. The sealing tape (2) as claimed in claim 1, characterized in that the sealing tape (2) has a continuous barrier structure (18) for reducing the diffusion of water vapour and / or the permeability to air in the functional direction (F), the barrier structure extending from the upper side (6) to the lower side (8) and at least in part through the region with the third height (h3).

3. The sealing tape (2) as claimed in one of the preceding claims, characterized in that the first height and second height (h1, h2) are substantially identical.

4. The sealing tape (2) as claimed in one of the preceding claims, characterized in that the third height (h3) is between 2 and 95%, preferably between 3 and 80%, more preferably between 5 and 50% of the first height (h1).

5. The sealing tape (2) as claimed in one of claims 2 to 4, characterized in that the barrier structure (18) is formed in part by a permanently compressed and / or fused section (24) of the at least one main body (4).

6. The sealing tape (2) as claimed in one of claims 2 to 5, characterized in that the barrier structure (18) is formed in part by a barrier layer (20) disposed on the upper side of the at least one main body (4).

7. The sealing tape (2) as claimed in claim 6, characterized in that the barrier layer (20) disposed on the upper side of the at least one main body (4) has or is formed from closed-cell flexible foam.

8. The sealing tape (2) as claimed in claim 6 or claim 7, characterized in that the barrier layer (20) disposed on the upper side of the at least one main body (4) is permanently compressed and / or fused in the region of the third height (h3) of the sealing tape (2).

9. The sealing tape (2) as claimed in one of claims 2 to 8, characterized in that the barrier structure (18) is formed in part by a barrier layer (22) disposed on the lower side of the at least one main body (4).

10. The sealing tape (2) as claimed in claim 9, characterized in that the barrier layer (22) disposed on the lower side of the at least one main body (4) is formed by the adhesive layer (12) or has or is formed from closed-cell flexible foam.

11. The sealing tape (2) as claimed in claim 9 or claim 10, characterized in that the barrier layer (22) disposed on the lower side of the at least one main body (4) is permanently compressed and / or fused in the region of the third height (h3) of the sealing tape (2).

12. The sealing tape (2) as claimed in one of the preceding claims, characterized in that the region of the third height (h3) is disposed substantially centrally between the two side flanks (10).

13. The sealing tape (2) as claimed in one of the preceding claims, characterized in that the depression (16) extends over a region of 2 to 60%, preferably 5 to 40% of the total width of the sealing tape.

14. The sealing tape (2) as claimed in one of the preceding claims, characterized in that the sealing tape (2) has exactly one integral main body (4) produced from flexible foam.

15. The sealing tape (2) as claimed in claim 14, characterized in that in the fully expanded state of the sealing tape (2), a bottom surface of the main body (4) is flat.

16. The sealing tape (2) as claimed in claim 14, characterized in that in the fully expanded state of the sealing tape (2), a bottom surface of the main body (4) has a profile with at least one lower depression (28), wherein the at least one lower depression (28) is orientated in the direction of the upper side (6) of the sealing tape (2) and lies opposite the at least one depression (16) on the upper side (6) in the region of the third height (h3).

17. The sealing tape (2) as claimed in one of the preceding claims, characterized in that in the fully expanded state of the sealing tape (2), the adhesive layer (12) is flat.

18. The sealing tape (2) as claimed in claim 16, characterized in that in the fully expanded state of the sealing tape (2), the adhesive layer (12) has a hill-shaped profile and substantially follows the shape of the lower depression (28).

19. The sealing tape (2) as claimed in one of the preceding claims, characterized in that the compression and / or fusion of the main body (4), preferably also the compression and / or fusion of the barrier layer (20) on the upper side, more preferably also the compression and / or fusion of the barrier layer (22) on the lower side, is obtained by means of adhesion, stitching, lamination or fusion.

20. The sealing tape (2) as claimed in one of claims 2 to 4, characterized in that the sealing tape (2) has two main bodies (4) produced from flexible foam which are disposed adjacent to one another in the functional direction (F) of the sealing tape, wherein the region with the third height (h3) is formed in a transitional region (36) between the two main bodies (4), wherein the smaller third height (h3) is obtained by a permanent compression of one of the main bodies (4) close to the transitional region (36) to the other main body (4).

21. The sealing tape (2) as claimed in one of claims 2 to 4, characterized in that the sealing tape (2) has two main bodies (4) produced from flexible foam which are disposed adjacent to one another in the functional direction (F) of the sealing tape (2), wherein the region with the third height (h3) is formed in a transitional region (36) between the two main bodies (4), wherein the smaller third height (h3) is obtained by a permanent compression of the two main bodies (4) close to the transitional region (36) between the two main bodies (4).

22. The sealing tape (2) as claimed in claim 20 or claim 21, characterized in that the compression of the one or of both main bodies (4) is respectively obtained by using a covering (34) which surrounds the respective main body (4) on the upper side, the lower side and the side facing the other main body (4).

23. The sealing tape (2) as claimed in claim 22, characterized in that the covering (34) forms at least a portion of the barrier structure (18).

24. The sealing tape (2) as claimed in claim 22 or claim 23, characterized in that the covering (34) has or is formed from closed-cell flexible foam.

25. The sealing tape (2) as claimed in one of claims 20 to 24, characterized in that the compression is obtained by bending a first shank (30) of the main body (4) with respect to a second shank (32) of the main body (4) through 180°, wherein the bending point is disposed in the transitional region (36) to the other main body (4) and wherein the foam material of the main body (4) is compressed in the region of the bending point because of the bending.

26. The sealing tape (2) as claimed in claim 25, characterized in that the first and second shanks (30, 32) are bonded together at their surfaces which lie on top of each other, preferably by adhesion or lamination to each other.

27. The sealing tape (2) as claimed in one of claims 20 to 26, characterized in that the two adjacent main bodies (4) are permanently bonded to each other in the transitional region (36).

28. A roll (26) of sealing tape with a sealing tape (2) as claimed in one of the preceding claims rolled up into a roll, wherein the sealing tape (2) in the roll (26) of sealing tape is in a compressed state in which the upper side (6) and the lower side (8) of the sealing tape (2) extend substantially in a straight line or the depression (16) is significantly less pronounced than in the fully expanded state.

29. A section of a building (42) with a wall (40) and a building component (14) inserted into an opening in the wall, wherein a sealing tape (2) as claimed in one of claims 1 to 27 in a partially compressed state for installation is disposed in a joint (38) between the building component (14) and the wall (40) and seals the joint (38), wherein in the partially compressed state for installation, the upper side (6) of the sealing tape (2) abuts against the wall (40) in the region of the side flanks (10) of the sealing tape (2), while the upper side (6) of the sealing tape (2) does not abut against the wall (40) at least in the region of the original third height (h3) or abuts against the wall (40) with a lower contact pressure than in the region of the side flanks (10) of the sealing tape (2).