DE102021106858A1 - Dual composite foam sealing tape and method of making same - Google Patents

Abstract

Sealing tape (1), which extends in a longitudinal direction (L), a width direction (B) perpendicular to the longitudinal direction (L) and a thickness direction (D) perpendicular to the longitudinal direction (L) and to the width direction (B), wherein the Sealing tape (1) has a first foam part (2) and a second foam part (4), the first foam part (2) and the second foam part (4) differing in at least one physical property and the first foam part (2) and the second foam part (4) each have a first surface and wherein the first foam part (2) has a second surface (22a) which is opposite the first surface of the first foam part (2) and the second foam part (4) has a second surface (42a) which is opposite to the first surface (4a) of the second foam part (4) and wherein the first surfaces (2a, 4a) of the foam parts (2, 4) or the second surfaces (22a, 42a) of the foam parts (2, 4) are connected to one another and/or rest against one another, these first and second surfaces (2a, 4a, 22a, 42a) extending essentially completely in the width direction (B) and/or the longitudinal direction (L). , characterized in that the first surfaces (2a, 4a) run both in the longitudinal direction (L) and in the width direction (B) as well as in the thickness direction (D) and/or the first surfaces (2a, 4a) at least in sections do not just runs.

Description

The present invention relates to a sealing tape and more particularly to a sealing tape for sealing parts of buildings. Numerous sealing tapes are known from the prior art. These have, for example, foam materials which have adhesive strips in order to be attached to parts of the building. Sealing tapes are also known in the prior art which have barrier layers or layers with different functions on the edge or in their interior. Different sealing tapes or sealing tape concepts are often provided for specific applications. In this case, a specific concept does not allow very high variability in use.

The present invention is therefore based on the object of providing a sealing strip which can be adapted to different requirements with minor changes during its manufacture.

According to the invention, this is achieved by a sealing tape in a method for producing a sealing tape according to the independent patent claims. Advantageous embodiments and developments are the subject of the dependent claims.

A sealing tape according to the invention extends in a longitudinal direction, a width direction perpendicular to the longitudinal direction, and a thickness direction perpendicular to the longitudinal direction and to the width direction. This sealing tape has a first foam part and a second foam part, the first foam part and the second foam part differing in at least one physical property.

Furthermore, the first foam part and the second foam part each have a first surface, with the first foam part having a second surface which is opposite the first surface of the first foam part and the second foam part has a second surface which is opposite the first surface of the second foam part and wherein the first surfaces of the foam parts or the second surfaces of the foam parts are connected to one another and/or abut one another, these first and second surfaces extending essentially completely in the width direction and/or the longitudinal direction.

According to the invention, the first surfaces run both in the longitudinal direction and in the width direction as well as in the thickness direction and/or the first surfaces do not run evenly, at least in sections.

These first surfaces are preferably surfaces created by a cut. The second surfaces preferably run in one plane and in particular (exclusively) in the longitudinal direction and the width direction.

In this context, extending or running in the thickness direction does not mean the presence of a certain finite thickness, but that the position of the surface viewed in the thickness direction changes over the course of the surface (in particular in the longitudinal direction and/or the width direction).

The longitudinal direction, the width direction and the thickness direction, in which the two surfaces extend, preferably correspond to the longitudinal direction, the width direction and the thickness direction of the sealing strip. The definition of the respective direction is therefore preferably based on the same coordinate system as in the definition of the directions of extent of the surfaces.

Exactly two surfaces preferably run both in the longitudinal direction and in the width direction as well as in the thickness direction and/or exactly two surfaces do not run evenly (or not within a plane) at least in sections.

In a preferred embodiment, an upper side (or an upper surface) of the sealing tape extends only in the longitudinal direction and the width direction. Preferably, an underside (or a lower surface of the sealing strip also runs exclusively in the longitudinal direction and in the width direction. The upper side and the lower side of the sealing strip are preferably parallel to one another.

A sealing tape is therefore proposed which is composed of at least two different foam parts which are connected to one another. As mentioned above, the contact surface of these two foam parts is preferably not flat, at least in sections. As mentioned in detail below, this (surface) surface or also the contact surface between the two foam parts can, for example, have a wave-like design. This surface preferably runs at least partially and preferably completely inside the sealing strip body. It would also be conceivable, however, for said contact surface to run flat, at least when the sealing strip is in a fully recovered state. It would also be conceivable that this contact surface is not flat both in a restored state and in a compressed state.

As mentioned above, the contact surface can be formed by the two first surfaces or by the two second surfaces.

The sealing tape according to the invention allows a high degree of variability in use. In this way, the two foam parts involved can be adapted to a wide range of applications in terms of their respective physical properties, for example resilience or bulk density. Preferably, the two said surfaces that are connected to each other are adapted to each other in terms of their course, so that, for example, both surfaces (of the foam parts) have a wavy structure or zigzag - shaped structure (or else a flat course), which fit together in an assembled state , or are coordinated with each other. As mentioned precisely below, this can be achieved, for example, by similar or identical cuts in the respective foam carrier.

At least one of the surfaces mentioned and particularly preferably both surfaces are preferably cut surfaces, ie cut surfaces which have arisen as part of a production process by cutting at least one foam carrier (and in particular by a profile cut).

In a preferred embodiment, the surfaces on which the foam parts touch (and/or are arranged adjacent to one another) are arranged essentially centrally within the body of the sealing strip. However, it would also be possible for these surfaces to be deliberately designed asymmetrically with respect to the foam body, for example this contact surface being arranged closer to a first surface than to a second surface opposite this first surface. In this case, too, the sealing tape can be adapted to the different requirements in the building sector.

The two foam parts preferably have the same extent in the width direction.

In a further preferred embodiment, the two foam parts have the same thicknesses. The thickness of the foam part is understood to mean a thickness averaged over the width.

However, it would also be possible for the two foam parts to have different thicknesses (averaged over the width direction). The sealing tape preferably has a first thickness ratio between the first foam part and the second foam part in the width direction in a first end section (i.e. in particular in the area of a first side edge) and a second thickness ratio in a second end section, these thickness ratios differing from one another. This is achieved in that, as mentioned above, the contact surfaces or the above-mentioned surfaces via which the foam parts are connected to one another not only extend in the longitudinal and width directions, but also in the thickness direction.

The two surfaces of the foam parts on which they are connected to one another are preferably designed to be complementary to one another. In a further advantageous embodiment, at least one foam part is impregnated for delayed recovery. In a further preferred embodiment, both foam parts can also be impregnated for delayed recovery.

In a further preferred embodiment, at least one foam part and preferably both foam parts are not impregnated. Furthermore, it would also be possible for precisely one foam part to be impregnated for delayed recovery and the other foam part not.

In a further preferred embodiment, at least one of the surfaces (which is connected to another surface) has a course that is curved or angled at least in sections.

In a preferred embodiment, at least one surface and preferably both surfaces that are connected to one another have a curved course in one direction, in particular a projection in the longitudinal direction of the sealing strip and/or a projection in the width direction of the sealing strip. In a further advantageous embodiment, at least one of the surfaces has a periodic course in a projection, in particular a projection in the longitudinal direction or in the width direction.

In a further preferred embodiment, this periodic profile has a specific, predetermined period.

In a further preferred embodiment, said first surface and the second surface are connected at least in sections by means of an intermediate layer and in particular an adhesive layer. The adhesive layer can be, for example, a free-flowing one Act adhesive and / or spray adhesive and / or hot-melt adhesive, which is arranged between said surfaces. However, it would also be possible for the cohesion to be brought about by a double-sided adhesive tape. The two surfaces are advantageously connected completely by means of an adhesive layer.

It is possible that this adhesive layer and/or the connecting layer itself is permeable to air and/or vapor. For a further possible application, it is advantageous that this adhesive layer and/or the connecting layer itself is as impermeable to air and/or vapor as possible. Said adhesive layer preferably extends in the same way as the surfaces of the two foam parts which it holds together.

The two surfaces are preferably separated from one another at least in sections and particularly preferably completely (in particular by the intermediate and/or adhesive layer).

In a further preferred embodiment, the intermediate layer and/or adhesive layer has a thickness that is greater than 10 μm. In a further preferred embodiment, the intermediate layer or adhesive layer has a thickness which is less than 1000 μm, preferably less than 800 μm, preferably less than 700 μm, preferably less than 600 μm, preferably less than 500 μm and preferably less than 400 μm .

In a further preferred embodiment, the adhesive layer runs (in particular when the sealing tape is in a completely recovered state) in a thickness region (i.e. in a region and/or volume section viewed in the thickness direction of the sealing tape) of the two foam parts which is greater than 5% of the total thickness, preferably greater than 10% of the total thickness, preferably greater than 20% of the total thickness. This information relates to a location of the adhesive layer within the sealing tape. In a projection of the sealing tape in the width and thickness direction, the adhesive layer therefore extends over the given percentages of the thickness.

Particularly preferably, the adhesive layer runs (especially in a fully recovered state of the sealing tape) in a thickness range of the sealing tape that is less than 90%, preferably less than 80%, preferably less than 70% and particularly preferably less than 60% of the total thickness. As mentioned above, this adhesive layer can be arranged both symmetrically and asymmetrically with respect to the top and bottom of the sealing tape.

In a further preferred embodiment, the intermediate layer or the adhesive layer comprises a substance and/or a material selected from a group of substances or materials which includes rubber, acrylate, silicone, polyurethane, PVAc (polyvinyl acetate), ethyl vinyl acetate copolymer (EVA ), polyamides, epoxides, cyanoacrylates, polyolefins, polyesters, thermoplastic rubbers containing butyl rubber and/or of the class polyaddition adhesives (e.g. epoxides, polyurethanes, etc.); Polycondensation adhesives (e.g. silicones), polymerization adhesives (e.g. cyanoacrylates), adhesives based on acrylate dispersions, and hot melt adhesives (hotmelts) based on polyolefins, EVA, polyester, polyamides, polyurethanes, thermoplastic rubbers (butyls), acrylates.

In a further preferred embodiment, the physical property of at least one foam part is selected from a group of properties which include a bulk density of the foam, a resilience of the foam, the presence of an impregnation, a color, a thickness, the presence of intumescent agents, a specific foam material, a specific compression set, vapor diffusion, foam type, air permeability, airtightness, and the like.

In a further preferred embodiment, an adhesive element and in particular a self-adhesive film is arranged on at least one outer surface of the sealing tape. Advantageously, this is an outer surface that extends in the longitudinal direction and in the width direction. However, it would also be conceivable for the self-adhesive film to be arranged on an outer surface which extends in the longitudinal direction and the direction of thickness or in the direction of thickness and the direction of width. In a further preferred embodiment, the sealing tape is made up as a roll of sealing tape. The sealing tape is preferably made up as a roll in such a way that the said self-adhesive layer arranged on the outer surface (in particular together with the foams) is also wound up in a spiral shape.

The present invention is also directed to a foam intermediate product for the production of a sealing tape and in particular a sealing tape of the type described above which extends in a longitudinal direction, a width direction perpendicular to the longitudinal direction and a thickness direction perpendicular to the longitudinal direction and to the width direction, wherein the Foam - intermediate product has a first foam part and a second foam part, wherein the first foam part and the second foam part differ in at least one physical property.

Furthermore, the first foam part and the second foam part each have a first surface and the first foam part has a second surface which is opposite the first surface of the first foam part and the second foam part has a second surface which is opposite the first surface of the second foam part and the first surfaces of the foam parts or the second surfaces of the foam parts are connected to one another and/or abut one another, these first and second surfaces extending essentially completely in the width direction (B) and/or the lengthwise direction (L).

According to the invention, at least one of the first surfaces (and preferably both first surfaces) runs or extends both in the longitudinal direction and in the width direction as well as in the thickness direction and/or at least one first surface (and preferably both first surfaces) does not run at least in sections even.

The (first) surfaces preferably have a periodic course in a projection along the longitudinal direction or the width direction. In this case, this surface can be designed, for example, in the form of a sinusoidal wave.

In a further advantageous embodiment, an adhesive layer and in particular a self-adhesive layer is arranged on at least one surface of the combination of the two foam parts. In a further preferred embodiment, the intermediate product is made up as a roll, with this roll preferably having a roll length that is greater than 3 m, preferably greater than 5 m. The roll length is preferably less than 10 m.

The present invention is further directed to a method for manufacturing a sealing tape and in particular a sealing tape of the type described above. A first foam backing and a second foam backing are provided, the first foam backing and the second foam backing preferably each extending in a longitudinal direction, a width direction perpendicular to the longitudinal direction and a thickness direction perpendicular to the longitudinal direction and the width direction.

In a further process step, the first foam backing and the second foam backing are cut in such a way that two first foam parts are formed from the first foam backing and two second foam parts are formed from the second foam backing. These foam parts are preferably completely separated from one another. These two foam parts preferably also extend in the longitudinal direction, the width direction and the thickness direction. A surface of the foam backing which extends in the longitudinal and width directions preferably remains untouched by the cut or this surface is not cut.

The first foam part and the second foam part each have at least one first surface created by the cut and a second surface opposite this first surface.

In a further process step, a first foam part and a second foam part are connected to form a composite on a surface of the first foam part and a surface of the second foam part, with at least one of the surfaces of the first foam part and at least one of the surfaces of the second foam part not being in one plane at least in sections and/or uneven and/or wherein the cut or the cuts and/or at least one of the surfaces extend both in the longitudinal direction and the width direction as well as the thickness direction and/or wherein the cut at least partially does not run in one plane.

A first surface of the first foam part created by the cut and a first surface of the second foam part created by the cut or the second surface of the first foam part and the second surface of the second foam part are preferably joined and/or connected to one another.

In a further process step, a first foam part and a second foam part are joined together to form a composite on the first surfaces of the foam parts or on the second surfaces of the foam parts, with the first surfaces of the foam parts not running in one plane at least in sections and/or the first surfaces both in the longitudinal direction as well as in the width direction and in the thickness direction.

It is therefore preferably also proposed in terms of the method that two foam parts are joined together on one surface and preferably on a surface that does not run in one plane at least in sections and/or along a surface that extends both in the longitudinal direction, as well as the width direction and the thickness direction.

In a further preferred method, the first cut and/or the second cut extend and preferably both cuts extend completely in the longitudinal direction and/or the width direction and preferably in both the longitudinal direction and the width direction.

In another preferred method, said cuts are complementary to each other. In this way, the foam parts can be assembled and in particular joined together in a particularly favorable manner. In a further preferred method, said foam parts are glued to one another and in particular glued to one another over their entire surface. As mentioned above, this can be done by attaching a self-adhesive film, but applying an adhesive would also be possible.

In another preferred method, at least one foam carrier is impregnated for delayed recovery.

In a further preferred method, the other first foam part of the first foam carrier and the other second foam part of the second foam carrier are joined together. In this way, the manufacturing process can be prevented from generating excessive waste.

It is thus proposed that at least two different foam webs are each cut and in particular divided by a cut and in particular a profile cut in their height or thickness and then connected to the respective counterpart of the other foam carrier and in particular glued. These composites are then preferably compressed and, in particular, compressed to form docks and/or compressed (large) rolls.

As mentioned above, the foam carriers can differ in particular with regard to their foam type, foam material, airtightness, foam color and impregnation. In addition, it is also possible that the initial thicknesses of the foam backing differ from one another. In a preferred method, the aforesaid profile cut has the same waveform in both foam backings or webs, which may be, for example, a sinusoidal waveform.

Preferably, the wavelengths also match and, as explained in more detail below, preferably result in twice the parting width.

In a preferred method, the composite of the first foam part and the second foam part is cut at least along a cutting plane that extends in the thickness direction of the composite. In this case, this cutting can take place in particular when the foam composite is in a rolled-up state. It is thus possible for the combination of the two foam parts to be rolled up onto a large roll and for the cutting to take place on this large roll (so-called cutting off).

In addition, the profile cuts also have the same amplitude so that, as mentioned above, the web parts or the foam parts can be exchanged.

In a preferred method, the joining can be done by gluing. This can be done, for example, by means of a spray adhesive, over the entire surface or with a self-adhesive film or an adhesive strip. It is also possible for adhesive strips to be applied only in certain areas, for example in a wave crest or a wave trough of the profile sections lying against one another.

Preferably, the aforesaid cutting off, which can take place, for example, in the extreme values of the shaft geometry, results in rolls with different proportions of the two foams on both sides of the roll, with properties also being able to be influenced as a result. For example, a different compression can result in relation to one component in each case, or a different color impression.

The technique of profile cutting is known from the prior art and is already used in products according to the prior art. The foam usually runs through a pair of rollers (profiling rollers) with a horizontal knife behind them. Essentially, the foam is pressed into a defined contour and cut back to its original shape during the subsequent expansion. This is how the desired contour is created with the right profiling rollers and skilful process management. As a result, when using the above-described invention using this profile section, a product is obtained which can differ significantly from products according to the prior art in terms of its appearance as well as its technical properties.

In a further preferred method, an adhesive element and in particular a self-adhesive layer is attached to at least one surface of the composite. This surface preferably also extends in a longitudinal and width direction of the composite and in particular also perpendicular to the thickness direction of the composite. This makes it possible for this self-adhesive layer to run parallel to an imaginary average arrangement of the profile section.

In a further preferred method, a cut with a periodic progression is made to separate the foam carrier, in particular the above-mentioned profile cut.

Further advantages and embodiments result from the attached drawings:

• 1a eine Darstellung der Schaumstoffträger;
• 1b eine Darstellung des Schneidevorgangs der Schaumstoffträger;
• 1c eine Darstellung des Zusammenfügens zu den jeweiligen Verbunden;
• 1d eine weitere Darstellung des Zusammenfügens;
• 1e eine weitere Darstellung des Zusammenfügens
• 2 eine Darstellung eines erfindungsgemäßen Zwischenprodukts zur Herstellung eines Dichtbandes;
• 3 eine Darstellung des erfindungsgemäßen Dichtbands;
• 4a - 4d Darstellungen von Ausgestaltungen eines erfindungsgemäßen Zwischenproduktes; und
• 5 Seitenansichten eines als Dichtbandrolle konfektionierten Dichtbandes.

Show in it:

• 1a a representation of the foam carrier;
• 1b a representation of the cutting process of the foam carrier;
• 1c a representation of the assembly to the respective composites;
• 1d another representation of the joining;
• 1e another representation of the joining
• 2 a representation of an intermediate product according to the invention for the production of a sealing tape;
• 3 a representation of the sealing tape according to the invention;
• 4a - 4d Representations of configurations of an intermediate product according to the invention; and
• 5 Side views of a sealing tape made up as a roll of sealing tape.

1a shows a schematic representation to illustrate the method according to the invention. First, two foam carriers 22 and 24 are provided. These each extend in a longitudinal direction L, a width direction B and a thickness direction D. These two foam supports 22, 24 preferably have different physical properties, as mentioned above, in particular different bulk densities, different materials or the like.

As in 1b shown, the two foam carriers 22 and 24 are cut, resulting in two first foam parts 2.2' and two second foam parts 4.4'. It can be seen that the sections S1, S2 are profile sections and are sinusoidal here, for example. In this case, however, the two cuts S1 and S2 preferably match one another, so that the foam parts can be joined together in a further method step.

The reference symbols 22a and 42a each refer to second surfaces of the first and second foam parts 2, 4, these second surfaces corresponding to the respective first surfaces 2a, 4a (cf. 1c ) or the surfaces created by the cut. The second surfaces are preferably each flat or run in the longitudinal direction L and the width direction B.

The reference numbers 42'a and 22'a refer to corresponding second surfaces of the foam parts 4' and 2'. These second surfaces are preferably also flat and/or run in the longitudinal direction and in the width direction.

1c illustrates the joining together of the foam part 2' and the foam part 4' on the one hand and of the foam part 2 and the foam part 4 on the other hand. Due to the identical cuts, the respective foam parts can also be fitted together again and, in particular, be glued to one another over the entire surface. The reference numbers 2a, 2'a, 4a and 4'a each show the surfaces of the individual foam parts. As mentioned above, an adhesive layer is preferably arranged on these surfaces in order to join the two respective foam parts to one another. A course of this intermediate layer or adhesive layer is preferably adapted to the course of the respective surfaces.

In this configuration, the respective second surfaces 22a, 22'a, 42a and 42'a are each outer surfaces of the composite. The connection is made here on those surfaces that were created by the cut.

1d shows a further configuration of a composite in a roughly schematic manner. In this configuration, the two foam parts 2, 4 (and correspondingly preferably also the foam parts 2' and 4', which are not shown, are joined to one another at their respective second surfaces 22a and 42a.

The surfaces 2a and 4a created by the cut each point outwards here.

At the in 1d shown configuration is a wave crest of the surface 2a opposite a wave trough of the surface 4a. In this configuration, the thickness of the composite is essentially constant along the longitudinal direction. This can result in a periodic profile of the connecting surface between the two foam parts when the composite is compressed in the thickness direction, especially if the two foams have different compressibility (but also with the same or similar compressibility).

At the in 1e shown embodiment are also joined together at their respective second surfaces, the foam parts. In contrast to the in 1d However, here a maximum M1 (or a wave crest) of the surface 2a is also opposite a maximum (pointing downwards) (or a wave crest) M2 of the surface 4a. The thickness of the composite thus also has a periodic profile along the width direction B, which has twice the amplitude of the profiles of the individual surfaces.

If the in 1e shown composite can also result in a periodic course of the connection surface, especially with different compressibility of the two foam parts.

2 shows this in this way (more precisely in the procedure according to 1c ) resulting intermediate product 30. Here, the two foam parts 2 and 4 are shown and between them the adhesive layer or the connecting plane 6, which runs sinusoidally here. This intermediate product preferably also extends in the longitudinal, width and thickness directions mentioned above.

References Sa, Sb and Sc refer to cuts made here in the thickness direction, which may be so-called roll parting. 3 shows part of the sealing tape that was created by cuts Sb and Sc. It can be seen that here the adhesive layer moves from a minimum to a maximum of the in 2 The sine curve shown runs and thus assumes a non-planar course.

It would also be possible for the adhesive layer in the intermediate product 2 to be designed, for example, in the form of a zigzag or trapezoidal shape. In this case, the adhesive layer could be 6 in 3 also run in a straight line or flat, but it would nevertheless extend both in the longitudinal and in the width direction as well as in the in 3 shown thickness direction D extend. Furthermore, it can be seen that a self-adhesive layer 8 is arranged on the sealing tape. This adhesive layer can already be attached to the in 2 shown composite are arranged and then this composite can be rolled up to form a large roll as mentioned above.

the 4a until 4d show variants for an asymmetrical structure of the sealing tape. It can be seen that at the in 4a - 4d shown representation, the adhesive plane 6, or the connection plane is arranged above a center of the intermediate product. You can also see the two partial figures from 4 that the amplitudes of the profile section and the bonding plane differ. In the first representation, the entire carrier tape has a thickness of 60 mm, with the adhesive layer moving in a thickness range of 10 mm and only beginning in the upper third of the foam carrier.

Only a foam thickness of 10 mm remains above the adhesive layer. The transom in 4a together with the dashed lines indicate the cutting lines along which the individual rolls are cut off. at 4b the adhesive layer or the connecting line also begins above the center line. Nevertheless, a total thickness of 20 mm is provided here for the section, that is to say twice the amplitude compared to the upper embodiment.

At the in 4c and 4d In the configuration shown, the connecting line or the adhesive line is also arranged asymmetrically or closer to the top O than to the bottom U of the intermediate product. The amplitude is chosen to be larger here than in the in 4a , 4b shown configurations and the thickness extension is here a total of 30 mm. The foam area above the tie layer is 10 mm and the foam area below the tie layer is 20 mm.

The one under the 4d The representation shown show a substantially symmetrical arrangement. Here the connecting line is arranged in the middle in relation to the entire foam composite. The extent of thickness here is 20 mm, and the areas above and below the connecting line also each have a thickness of 20 mm.

A typical configuration of sealing tapes could be an overall height of 60 mm. First, a black foam with a height of 60 mm and a gray foam with a height of 60 mm are profiled and one foam half is put together. This intermediate product is cut so that there is a ratio of 40mm black foam to 20mm gray foam on one side face of the strip. On the opposite side surface the ratio is reversed, 20mm black foam to 40mm gray foam.

The side surfaces of such a roll of sealing tape are in 5 shown. In this case, the reference number 12 relates to a roll core. It can be seen that in the first view or the inside view the first foam part 2 is thicker than the second foam part 4, whereas in the second view or the outside view the second foam part 4 is thicker than the first foam part 2.

The applicant reserves the right to claim all features disclosed in the application documents as essential to the invention, provided they are new compared to the prior art, either individually or in combination. It is also pointed out that the individual figures also describe features which can be advantageous in and of themselves. The person skilled in the art recognizes immediately that a specific feature described in a figure can also be advantageous without adopting further features from this figure. Furthermore, the person skilled in the art recognizes that advantages can also result from a combination of several features shown in individual figures or in different figures.

Claims (13)

Sealing tape (1), which extends in a longitudinal direction (L), a width direction (B) perpendicular to the longitudinal direction (L) and a thickness direction (D) perpendicular to the longitudinal direction (L) and to the width direction (B), wherein the Sealing tape (1) has a first foam part (2) and a second foam part (4), the first foam part (2) and the second foam part (4) differing in at least one physical property and the first foam part (2) and the second foam part (4) each have a first surface and wherein the first foam part (2) has a second surface (22a) which is opposite the first surface of the first foam part (2) and the second foam part (4) has a second surface (42a) which is opposite to the first surface (4a) of the second foam part (4) and wherein the first surfaces (2a, 4a) of the foam parts (2, 4) or the second surfaces (22a, 42a) of the foam parts (2, 4) are connected to one another and/or rest against one another, these first and second surfaces (2a, 4a, 22a, 42a) extending essentially completely in the width direction (B) and/or the longitudinal direction (L). , characterized in that the first surfaces (2a, 4a) run both in the longitudinal direction (L) and in the width direction (B) as well as in the thickness direction (D) and/or the first surfaces (2a, 4a) at least in sections does not go smoothly. sealing tape after claim 1 , characterized in that at least one of the surfaces has a course that is curved and/or angled at least in sections. Sealing tape according to at least one of the preceding claims, characterized in that at least one of the surfaces has a periodic course in a projection in the longitudinal direction or in the width direction. Sealing tape according to at least one of the preceding claims, characterized in that the first surfaces are connected at least in sections by means of an intermediate layer and/or adhesive layer. Sealing tape according to the preceding claim, characterized in that the adhesive layer has a substance selected from a group of substances including rubber, acrylate, silicone, polyurethane, PVAc (polyvinyl acetate), ethyl vinyl acetate copolymer (EVA), polyamides, epoxides, Cyanoacrylates, polyolefins, polyesters, thermoplastic rubbers containing butyl rubber and/or of the class polyaddition adhesives (e.g. epoxides, polyurethanes, etc.); Polycondensation adhesives (e.g. silicones) Polymerization adhesives (e.g. cyanoacrylates) Adhesives based on acrylate dispersions and hot melt adhesives (hotmelts) based on polyolefins, EVA, polyester, polyamides, polyurethanes, thermoplastic rubbers (butyls), acrylates. Sealing tape according to at least one of the preceding claims, characterized in that the physical property of the foams is selected from a group of properties which include a bulk density, resilience, impregnation, the content of intumescent substances, a colour, a thickness, a foam material and a certain compression hardness, a certain vapor diffusion, an air permeability, an airtightness and the like. Sealing tape according to at least one of the preceding claims, characterized in that an adhesive element and in particular a self-adhesive film is arranged on at least one outer surface. Foam - Intermediate product (30) for the production of a sealing tape which extends in a longitudinal direction (L), a width direction (B) perpendicular to the longitudinal direction (L) and one to the longitudinal direction (L) and to the width direction (B) vertical direction of thickness (D), the intermediate foam product having a first foam part (2) and a second foam part (4), the first foam part (2) and the second foam part (4) differing in at least one physical property and wherein the first foam part (2) and the second foam part (4) each have a first surface and the first foam part (2) has a second surface (22a) which is opposite the first surface of the first foam part (2) and the second foam part ( 4) has a second surface (42a) which is opposite the first surface (4a) of the second foam part (4) and wherein the first surfaces (2a, 4a) of the foam parts (2, 4) or the second surfaces (22a, 42a) of the foam parts (2, 4) are connected to one another and/or abut one another, with these first and second surfaces essentially being completely in the width in the longitudinal direction (B) and/or the longitudinal direction (L), characterized in that at least one of the first surfaces (2a, 4a) extends both in the longitudinal direction (L) and in the width direction (B) as well as in the thickness direction ( D) extends and/or at least one first surface (2a, 4a) is not flat at least in sections. Method for manufacturing a sealing tape with the steps: - Providing a first foam carrier (22) and a second foam carrier (24), the first foam carrier (22) and the second foam carrier each extending in a longitudinal direction (L), a width direction (B) perpendicular to the longitudinal direction (L) and a thickness direction (D) perpendicular to the longitudinal direction (L) and the width direction. - Cutting the first foam backing (22) and the second foam backing (24) in such a way that two first foam parts (2, 2') are formed from the first foam backing and two second foam parts (4, 4') are formed from the second foam backing (24). the first foam part (2) and the second foam part (4) each have at least a first surface (2a, 4a) created by the cut and a second surface (22a, 42a) opposite this first surface (2a, 4a). - Assembling a first foam part (2) and a second foam part (4) to form a composite (30) on the first surfaces (2a, 4a) of the foam parts or on the second surfaces (22a, 42a) of the foam parts (2, 4) , the first surfaces (2a, 4a) of the foam parts not running in one plane at least in sections and/or the first surfaces (22a, 42a) both in the longitudinal direction (L) and in the width direction (B) as well as in the thickness direction (D ) get lost. procedure after claim 9 , characterized in that the other first foam part (2 ') of the first foam carrier (22) and the other second foam part (4') of the second foam carrier (24) are joined together. Method according to at least one of the preceding claims 9 - 10 , characterized in that the composite of the first foam part (2) and the second foam part (4) is cut at least along a cutting plane which - in particular exclusively - extends in the thickness direction (D). Method according to at least one of the preceding claims, characterized in that an adhesive element and in particular a self-adhesive layer is attached to at least one surface of the composite. Method according to at least one of the preceding claims, characterized in that a cut with a periodic profile is made to separate the foam carrier.

Images