DK2990552T3 - Process for manufacturing a sealing tape roller and sealing tape roller - Google Patents

Description

The present invention relates to a method for the production of a sealing tape roll.

Sealing tapes unwound from sealing tape rolls are usually used to seal joints between the frame profile of a window, for example, or of a door and the wall of a building to seal off the joints against drafts and driving rain. Films additionally provided on a side surface of the sealing tape, furthermore, increase the impermeability of the tape to water vapor; see, for example, EP 0 072 955 A1 or EP 1 936 246 A1. Nevertheless, films which are attached to an outer surface of the sealing tape suffer from the disadvantage that they can be damaged during the transport or installation of the sealing tape. A sealing tape roll which comprises at least one barrier layer extending in the radial direction and which is arranged between two layers of the foam and thus in the interior of the sealing tape roll is known from DE 196 41 415 A1. As a result, the barrier layer is protected more effectively from damage. The barrier layer consists of an adhesive or of a lamination material. To produce a sealing tape of this type, large two-dimensional barrier layers are formed on sheets of an open-pore foam material by lamination or adhesive bonding. Several layers of foam sheets and barrier layers are stacked to form laminate blocks. These laminate blocks are cut into plates at right angles to the large two-dimensional barrier layers. The plates are then wound up into wide rolls in such a way that that the barrier layers and the foam material are arranged in a row in the axial direction on the circumference of the rolls. A wide roll of this type is then cut into disks between the individual barrier layers to obtain several sealing tape rolls. This method requires many complicated work steps, and the length of the sealing tapes produced is limited by the size limitation imposed by the laminate blocks, which must be small enough to be processed by machine. EP 2 620 565 A1 discloses a sealing tape, in which a barrier layer in the form of a film-like strip, which has the shape of a U or a V, is introduced into the sealing tape. For the production of this sealing tape, preferably a cut is made in a foam strip; the foam is opened up at this cut; and the film-like strip is introduced into the opened-up area. DE 20 2012 101 990 U1 describes another foam sealing tape, in which a barrier layer can be applied to various sections of the sealing tape or into a cut in the sealing tape. It discloses a method for the production of a sealing tape which comprises the features of the introductory clause of claim 1.

The present invention has the object of providing a method for the production of a roll of sealing tape with an interior barrier layer extending in the radial direction, wherein the properties of the sealing tape are variably configurable, and wherein the method is simple and reliable.

This object is solved by the features of claim 1.

According to the invention, the method for the production of a sealing tape of flexible, compressed foam with at least one barrier layer extending in the radial direction, which is arranged axially between two layers of foam, comprises the following steps in the order given: - providing at least one first foam strip of flexible foam, which is provided with at least one barrier layer on at least one of its side surfaces; - providing at least one second foam strip of flexible foam; - bringing the at least one first foam strip together with the at least one second foam strip in such a way that a foam-barrier layer web is formed, in which each barrier layer is arranged between adjacent foam strips; - applying a common connecting layer to all of the foam strips of the foam-barrier layer web on a surface which is perpendicular to each of the barrier layers; and - winding up the foam-barrier layer web into a sealing tape roll.

In this way, a sealing tape roll of flexible, compressed foam with at least one barrier layer extending in the radial direction to increase the impermeability to air and water vapor can be produced with relatively little effort. The barrier layer is protected from external damage during transport and installation of the sealing tape by its accommodation between two strips of foam. In addition, the properties of the sealing tape are configurable in an especially variable manner, because foam strips of any desired shape can be combined with each other.

Providing the at least one first foam strip preferably comprises the following steps: - providing a first foam web of a flexible foam; - applying at least one barrier layer to at least the top or bottom surface of the foam web to produce a laminated foam web; and - introducing at least one continuous cut into the laminated foam web in a longitudinal direction of the laminated foam web to produce a plurality of first foam strips, each of which is provided with a barrier layer.

In this way, several first foam strips can be produced simultaneously and in automated fashion.

Providing the first foam web preferably comprises the following steps: - providing a first roll consisting of the wound-up first foam web; and - unwinding the first foam web from the first roll.

In this way, the first foam web is easily and compactly stored before treatment and can be easily processed.

In one embodiment, the provided first foam web is impregnated. As a result, the sealing tape to be produced shows delayed recovery behavior.

In another embodiment, the provided first foam web is not impregnated, and after the step of applying the at least one barrier layer, the method for the production of the sealing tape roll comprises the following steps: - saturating the laminated foam web with an impregnating agent; and - drying the impregnated laminated foam web.

If the impregnation is not carried out until after the application of the barrier layer, the barrier layer will adhere especially securely to the foam.

The introduction of the at least one continuous cut into the laminated foam web is preferably conducted by means of at least one knife or at least one saw. These are especially well adapted to the cutting of the foam web.

It is especially preferable for the connecting layer to be a double-sided adhesive tape, which is lined on the side facing away from the foam strip with a peel-off film. In this way, the first foam strip and the second foam strip can be joined together in an especially easy manner without the need for any additional connecting means. In addition, the double-sided adhesive tape can be used directly to apply the sealing tape to a frame section of the window. A sealing tape roll produced by the method according to the invention comprises a wound-up foam-barrier layer web. The foam-barrier layer web comprises at least one first foam strip of flexible foam, which is provided with at least one barrier layer on at least one side, and comprises at least one second foam strip of flexible foam, wherein each barrier layer is arranged axially between two adjacent foam strips and extends in the radial direction in the sealing tape roll. A common connecting layer is applied to all of the foam strips of the foam-barrier layer web, at a surface perpendicular to each barrier layer, wherein this connecting layer forms the only connection between the foam strips.

In this way, the properties of the sealing tape can be configured in an especially variable manner, and the sealing tape is nevertheless easy to produce.

Preferably exactly one first foam strip works with exactly one second foam strip to form the foam-barrier layer web, wherein exactly one barrier layer is applied to the first foam strip. As a result, the sealing tape roll can be produced with an especially small amount of effort.

In an alternative embodiment, exactly one first foam strip works with exactly two second foam strips to form the foam-barrier layer web, wherein exactly two barrier layers are arranged on opposite sides of the first foam strip, and wherein the first foam strip is arranged between the two second foam strips. In this way, it is especially easy to obtain an improved sealing effect.

In another alternative embodiment, a plurality of first foam strips works with exactly one second foam strip to form the foam-barrier layer web, wherein exactly one barrier layer is applied to each first foam strip, and wherein the second foam strip is arranged on an edge of the foam-barrier layer web. In this way, sealing tapes with any desired number of alternating foam strips and barrier layers can be produced.

It is especially preferable for the connecting layer to be a double-sided adhesive tape, which is lined on the side facing away from the foam strip with a peel-off film. The foam strips are thus connected to each other in an especially simple and reliable manner. In addition, an adhesive layer is provided for the attachment of the sealing tape to a window frame.

The at least one first foam strip is preferably impregnated. As a result, the sealing tape to be produced shows delayed recovery behavior in this area.

It is especially preferable for the at least one second foam strip also to be impregnated and thus also to show delayed recovery behavior.

In an especially preferred embodiment, the at least one first foam strip consists of a foam material which is different from that of the at least one second foam strip. In this way, the properties of the sealing tape can be configured and influenced in an especially variable and simple manner.

The at least one first foam strip can also have a color different from that of the at least one second foam strip. As a result, the denser side of the sealing tape, which usually faces the interior of the room, can be made readily identifiable, which makes installation easier.

Additional features and advantages of the present invention and of a sealing tape produced by the method according to the invention can be derived from the following description, which refers to the drawings:

Figure 1 shows a perspective schematic diagram of an example of the sequence of steps by which first foam strips provided with barrier layers are produced as an optional part of the method according to the invention for the production of a sealing tape roll;

Figure 2 shows a perspective schematic diagram of an example of the sequence of steps for the production of second foam strips as an optional part of the method according to the invention;

Figure 3 shows a perspective schematic diagram of the optional step of the impregnation of the laminated foam web according to an exemplary embodiment of the method according to the invention;

Figure 4 shows a perspective schematic diagram of the essential steps of an exemplary embodiment of the method according to the invention for the production of a sealing tape roll;

Figure 5 shows a schematic cross-sectional view of a situation in which an embodiment of the sealing tape produced by the method according to the invention is installed;

Figure 6 shows a schematic cross-sectional view of a situation in which an alternative embodiment of the sealing tape produced by the method according to the invention is installed; and

Figure 7 shows a schematic cross-sectional view of a situation in which another alternative embodiment of the sealing tape produced by the method according to the invention is installed.

In Figure 1, first optional steps of an exemplary embodiment of the method according to the invention are shown. On a first roll 10, a flexible foam in the form of a wound-up first foam web 20 is provided. The flexible foam is provided on the first roll 10 in long lengths of up to 200 m, preferably of 5-100 m, and more preferably of 10-60 m. Any of the known open-cell, mixed-cell, or closed-cell flexible foams can be used as the foam material, such as foam made of polyurethane, polyethylene, polyvinyl chloride, or polypropylene, which recover their shape after compression. The first foam web 20 can be impregnated prior to further processing, but it is preferably not impregnated at this stage.

Because it is provided on the first roll 5, the foam web 20 can be transported and processed especially easily. The foam web 20 is usually on the first roll 10 in an uncompressed or only slightly compressed state. It is also possible for the foam web 20 on the first roll 10 to be in a compressed state, but then, after it has been unwound from the first roll 10, it must be ensured that the foam material has enough time to recover before it is subjected to further processing. The width of the foam web 20 is usually in the range between 1 cm and 5 m, preferably in the range of 1.0-1.5 m. The height of the foam web 20 in the relaxed state is usually in the range of 5-150 mm, more preferably in the range of 10-80 mm.

Alternatively, it is also possible to provide individual first foam webs 20 which are not wound up on a first roll 10, but this means that a larger amount of space is required to make them available for processing.

After it has been unwound from the first roll 10, the first foam web 20 is moved along a first conveying direction, indicated by the arrow V1. Then a barrier lay- er 30 is applied to the top surface 21 of the first foam web 20 to form a laminated foam web 34.

In the embodiment shown in Figure 1, the barrier layer 30 is formed by a film web, which is provided on a film supply roll 26. The barrier layer 30 configured as a film web is preferably applied from above onto the top surface 21 of the foam web 20. This is usually done in the area of a bonding unit, which is indicated schematically by the roller 28. The bonding step usually comprises a step of heat application and/or a step of pressing the barrier layer 30 and the foam web 20 together. In the case of a film web, the bonding to the foam web 20 in the bonding unit is preferably accomplished by lamination.

The barrier layer 30 can also be formed by a web of an adhesive tape with one adhesive side. The adhesive side of the adhesive tape is then usually provided with a peel-off film, which is removed shortly before application to the foam web 20. The barrier layer 30 can also be formed by a film web which itself comprises a layer of an adhesive tape or a solid layer of a hot-melt adhesive. Finally, to form the barrier layer 30, it is also possible to apply an adhesive-like liquid medium by means of nozzles (e.g., hot-melt nozzle, flat nozzle, mixing nozzle) or by roller application (transfer rollers) to the foam web 20. It is then possible to bond the barrier layer to the foam web 20, preferably in a bonding unit, in a manner which depends on the type of adhesive, wherein the adhesive usually solidifies. In principle, both chemical and physical types of solidification can be used. Here, too, the bonding of the barrier layer 30 to the foam web 20 will usually comprise a step of applying heat and/or a step of pressing the barrier layer 30 and the foam web 20 together. It is also possible to apply a spray adhesive to one side of the film web and to use this combination as the barrier layer 30. Finally, a skin of the foam material of the first foam web 20 itself can serve as the barrier layer 30, if the foam web 20 is partially melted on one side and then has solidified again or if the foam web 20 has a skin as a result of the manufacturing process.

Each of the steps of heat application cited above is carried out by means of a heating device, which is usually configured as a hot-air blower. It is also possible, however, to consider the use of radiant heating by means of, for example, an infrared heater or a microwave heater.

The function of the barrier layer 30 is preferably to reduce or prevent the passage of air and/or water vapor. This also applies to all of the following exemplary embodiments.

In alternative exemplary embodiments, the barrier layer 30 can also be attached from underneath, i.e., to the bottom surface 22 of the foam web 20. According to another exemplary embodiment, barrier layers 30 are applied to the top surface 21 and to the bottom surface 22 of the foam web 20.

Finally, it is also possible for a foam web 34 which has already been produced and already laminated with a barrier layer 30 to be wound up into the first roll 10.

By means of at least one knife 38, preferably several parallel knives 38, at least one continuous cut 40, preferably several parallel continuous cuts 40, are made in the laminated foam web 34 in the longitudinal direction of the laminated foam web 34, preferably parallel to the longitudinal edges 23 of the laminated foam web 34. The longitudinal edges 23 are the edges of the laminated foam web 34 which are parallel to the conveying direction V1 and orthogonal to the axial direction of the first roll 10. To introduce the at least one continuous cut 40 into the foam web 20, it is possible to use not only knives 38 but any other method known to the skilled person for cutting foam webs 20, such as cutting by means of saws, heated wires, laser cutters, or water-jet cutters.

The continuous cuts 40 produce a plurality of first foam strips 50, each of which is provided with a barrier layer 30. The first foam strips 50 produced by means of the at least one cut 40 can be of different widths, but preferably they are all of the same width. The width of a foam strip 50 is in the range between 5 mm and 30 cm, preferably in the range of 1-12 cm. The first foam strips 50 can be wound up at this point onto a supply roll (not shown), so that they can be sent elsewhere for further processing, which has the result of reducing the length of the overall production line; or they can be sent on directly for further processing. Overall, through the use of supply rolls for intermediate storage, the number of steps occurring in sequence in a production line can be varied, and thus the length of the individual subsections of the production line can be adapted as appropriate to the amount of space available.

It is also conceivable that the first foam web 20 could be cut into foam strips 50 first, and that the individual foam strips 50 could then be equipped with barrier layers 30. In this case, it is possible that the barrier layers 30 could extend over only a part of a side surface of the foam strips 50. Also in this case, a film which adheres to the foam strip 50 only at certain points can be used as the barrier layer 30, as a result of which, in the compressed state of the sealing tape, a loop, for example, can be present to serve as reserve material for later expansion. A barrier layer 30 in the form of a film, for example, can also be arranged over several side surfaces.

Figure 2 shows an example of the optional sequence of steps in the production of the second foam strip 60. For this purpose, a second foam web 58 of flexible foam is provided, preferably uncompressed, on a second roll 55. After it has been unwound from the second roll 55, the second foam web 58 is moved along in a second conveying direction V2. What was said concerning the type of foam used for the first foam web 20 also applies here.

By means of at least one knife 56, preferably several parallel knives 56, at least one continuous cut 59, preferably several parallel continuous cuts 59, are made in the second foam web 58 in a direction parallel to the longitudinal edges of the foam web 58. The at least one continuous cut 59 thus produces a plurality of second foam strips 60. Here, too, it is possible to use not only the knives 56 but also any other method known to the skilled person for cutting foam webs, such as cutting by means of saws, heated wires, laser cutters, or water-jet cutters. It is also possible here again for the second foam web 58 to be provided without being rolled up into a second roll 55. The second foam strips 60 can be rolled up at this point into a supply roll (not shown) or sent directly onward for further processing. Finally, the second foam strips 60 can also be provided individually. In addition, the second foam strips 60 can be provided with at least one barrier layer 30 like the first foam strips 50.

Figure 3 shows the optional step of the impregnation of the laminated foam web 34 or of the first foam strips 50. The impregnation is carried out either before the step of introducing the at least one cut 40 into the laminated foam web 34, or, as shown in Figure 3, after the introduction of the at least one continuous cut 40 into the laminated foam web 34. In the latter case, it is advantageous for the first foam strips 50 to be guided in parallel and impregnated simultaneously.

In theory, the impregnation can also be carried out before the application of the at least one barrier layer 30 to the foam web 20. As a result of the weaker adhesion of the barrier layer 30 to an impregnated foam web 20 and thus the increased difficulty of connecting the barrier layer 30 to the foam web 20, however, impregnation after the application of the barrier layer 30 is to be preferred.

In the example of Figure 3, the first foam strips 50 are guided next to each other through an impregnation unit 90. At least two rollers 91 guide the foam strips 50 into a bath of a suitable impregnating agent 94, and the foam fills up with the impregnating agent. Standard impregnating agents and methods for impregnating foams are known to the skilled person. The foam strips 50 are preferably compressed between the rollers 91 to promote the uptake of the impregnating agent 94 upon the subsequent recovery of the foam. After the impregnation in the impregnating unit 90, the excess impregnating agent is preferably squeezed out by means of rollers. In any case, the impregnated foam strips 50 are then dried in a drying unit 100. Here the impregnated foam strips 50 are dried in the known manner by means of, for example, hot air blowers or radiant heaters. After that, it is again possible either to wind up the strips onto a supply roll or to send them continuously onward for further processing.

The optional impregnation of the second foam web 58 or of the second foam strips 60 comprises the same steps.

Figure 4 shows the essential steps of an exemplary embodiment of the production method according to the invention which can be carried out subsequently to the steps shown in Figure 1, Figure 2, or Figure 3. In all of the exemplary embodiments of the invention described below, it is possible in principle for the first foam strips 50 provided with at least one barrier layer 30 to have been produced previously, e.g., at a different location or by a different manufacturer, and for them merely to be used in this finished form within the scope of the method according to the invention. The same also applies to the second foam strips 60.

In the exemplary embodiment shown in Figure 4, a first foam strip 50 and a second foam strip 60 of flexible foam are loosely brought together in such a way that a foam-barrier layer web 70 is formed, in which the barrier layer 30 is arranged between the two adjacent foam strips 50, 60. The foam strip 50, furthermore, is preferably rotated by means of a suitable deflecting device by 90° around its longitudinal axis, wherein the longitudinal axis extends along a fourth conveying direction V4. As a result of this rotation, the barrier layer 30 is then located on a side surface of the foam strip 50 facing the foam strip 60. No later than the bringing-together step, the first foam strip 50 and the second foam strip 60 are conveyed further along jointly in conveying direction V4, but they continue to be separate from each other. Several first foam strips 50 can also be brought together with one or more second foam strips 60, or several second foam strips 60 can be brought together with one or more first foam strips 50. The at least one first foam strip 50 can also be provided in such a way that no rotation of the first foam strip 50 is necessary. The at least one second foam strip 60 can also be provided in such a way that no rotation of the first foam strip 50 is necessary. The im- portant point in all cases is that each side surface of the first foam strip 50 provided with a barrier layer 30 faces the adjacent foam strip 50, 60.

After the at least one first foam strip 50 has been brought together with the at least one second foam strip 60 to form a foam-barrier layer web 70, a common connecting layer 80 is applied to all of the foam strips 50, 60 of the foam-barrier layer web 70. The application of the common connecting layer 80 is carried out on a surface of the foam-barrier layer web 70 which is perpendicular to the at least one barrier layer 30. The connecting layer 80 represents the only permanent connection between the foam strips 50, 60 of the foam-barrier layer web 70.

The connecting layer 80 is preferably provided on a supply roll 76, and, in the area of an application station, indicated schematically here by the roller 78, is applied to the foam-barrier layer web 70 and preferably pressed or rolled firmly down there. The use of double-sided adhesive tape is especially effective as the connecting layer 80. This offers the advantage that it is can be easily applied to the foam-barrier layer web 70 and simultaneously provides an adhesive surface on the side facing away from the foam-barrier layer web 70, by means of which surface the sealing tape 2 can be attached during installation to a frame section of a window. This second adhesive surface of the double-sided adhesive tape on the side facing away from the foam-barrier layer web 70 is first lined with a peel-off film 81 to avoid sticking during further processing. In addition to the use of double-sided adhesive as a connecting layer 80, the use of textile fabrics, layers of nonwoven material, or other connecting layers which are effective for connecting several foam strips together are also possible. Here the connection of the connecting layer 80 to the foam strips 50, 60 is preferably carried out by adhesive bonding or lamination.

After the application of the common connecting layer 80 to all of the foam strips 50, 60 of the foam-barrier layer web 70, this web is compressed as it is being wound up to form a sealing tape roll 1. One or more pairs of compression rollers 84, for example, can be used to accomplish this compression. Alternatively or in addition, it is also possible for a compression roller (not shown) to cooperate directly with the sealing tape roll 1 as the sealing tape 2 is being wound up onto the roll.

In all of the exemplary embodiments, two connecting layers 80 can be applied, one to each of the two opposite sides of the foam-barrier layer web 70.

In an alternative exemplary embodiment, a foam-barrier layer web 70 consisting of a plurality of foam strips 50, 60 and barrier layers 30 is, after the application of the common connecting layer 80, compressed as it is being wound up into a wide roll (not shown), which can then be cut by means of at least one knife or at least one saw into sealing tape rolls 1 of the desired width.

The conveying directions V1, V2, V3, and V4 can be the same as, or different from, each other depending on the arrangement of the subsections of the production line.

In addition to the tensile forces originating from the downstream winding-up, all of the foam webs, foam strips, or foam-barrier layer webs are preferably conveyed forward by rollers, especially preferably by pairs of counter-rotating rollers. Conveyor belts can also be used. Transport means of these types can also be used for the film web or adhesive tape web.

Figure 5 shows a situation in which the sealing tape 2, which has been unwound from the sealing tape roll 1 according to Figure 4, has been installed. For installation, the sealing tape 2 must first be unwound and cut into strips of any desired length. The length of the sealing tape strips will usually be adapted to the external contours of the window frame or door frame to be sealed. The sealing tape 2 is then attached to the window frame 112 or door frame by means of the double-sided adhesive functioning as the connecting layer 80 or by means of other adhesive layers, adhesive tapes, or other suitably adapted means. If double-sided adhesive tape is used as the connecting layer 80, therefore, it is necessary merely to remove the peel-off film 81, which lines the side of the double-side adhesive facing away from the foam strip 50, 60, before the sealing tape 2 can be applied directly to the window frame 112.

In the installation situation illustrated in Figure 5, the sealing tape 2 is introduced between a window frame 112 and a masonry wall 110 to seal off the joint between these two elements. The illustrated sealing tape 2 comprises in this case a first foam strip 50, which is provided with a barrier layer 30, and a second foam strip 60. The barrier layer 30 is held for protection between the foam strips 50, 60, as a result of which damage during storage, transport, and installation of the sealing tape roll 1 or of the sealing tape 2 is avoided.

The sealing tape 2 is to be installed in such a way that at least one barrier layer 30 extends from the window frame 112 to the masonry wall 110 and will thus be substantially at a right angle to a functional direction F of the sealing tape 2. The functional direction F is parallel to the surfaces of the window frame 112 and of the masonry wall 110 forming the joint to be sealed and extends from an exterior side of the room (on the left in Figure 5) to an interior side of the room (on the right in Figure 5). In this way, a reliable seal against drafts and vapor diffusion can be guaranteed.

For additional modification of the sealing properties of the sealing tape 2, the first foam strip 50 can consist of a foam material different from that of the second foam strip 60. The first foam strips 50 and the second foam strips 60 can also be impregnated with different impregnating agents, or only the first foam strips 50 or only the second foam strips 60 can be impregnated. In another exemplary embodiment, the first foam strips 50 can have a different color than the second foam strips 60. As a result, it is possible, for example, to identify the preferred installation direction of the sealing tape 2.

In principle, the sealing tape 2 can have any desired number of barrier layers 30. Different widths and/or heights of the first foam strips 50 and/or different widths and/or heights of the second foam strips 60 are also conceivable, even within the same sealing tape 2. Within a sealing tape 2, the one or more first foam strips 50 can also have a different width and/or height than the one or more second foam strips 60. The width of the sealing tape 2 is usually in the range between 5 mm and 20 cm, preferably in the range of 1-12 cm. In the relaxed state, the sealing tape 2 usually has a height in the range between 5 mm and 30 cm, preferably in the range of 1-12 cm.

In the exemplary embodiment shown in Figure 5, exactly one first foam strip 50 works together with exactly one second foam strip 60 to form the first foam-barrier layer web 70, which is wound up into the sealing tape roll 1. There are many other possibilities of structuring a preferred sealing tape 2.

Figure 6 shows another exemplary embodiment. Here exactly one first foam strip 50 is brought together with exactly two second foam strips 60 to form the foam-barrier layer web 70, wherein the first foam strip 50 in this case comprises two barrier layers 30, which are arranged on opposite sides of the first foam strip 50. The first foam strip 50 is arranged between the two second foam strips 60 in such a way that the barrier layers 30 are, in each case, between the first foam strip 50 and one of the second foam strips 60. In the production of this variant, the first foam web 20 (Figure 1) must be provided with a barrier layer 30 on the top surface 21 and on the bottom surface 22, and then the three foam strips 50, 60 are brought together and connected to each other by the connecting layer 80, in a manner similar to that shown in Figure 4.

In another alternative exemplary embodiment according to Figure 7, a plurality of first foam strips 50, here three first foam strips 50, is brought together with exactly one second foam strip 60 to form the foam-barrier layer web 70, wherein, in each case, exactly one barrier layer 30 is arranged on each first foam strip 50, and wherein the second foam strip 60 is arranged on an edge of the foam-barrier layer web 70. Here, too, the barrier layers 30 are arranged between adjacent foam strips 50, 60. In the production of this variant, the first foam web 20 (Figure 1) must merely be provided with a barrier layer 30 on the top surface 21 or on the bottom surface 22, and then the three first foam strips 50, in an orientation rotated by 90°, are brought together with the one second foam strip 60 and connected to each other by the connecting layer 80, in a manner similar to that shown in Figure 4.

It is also possible for two barrier layers of two adjacent foam strips 50, 50 or 50, 60 to be arranged directly next to each other.

In principle, it is possible in this way to configure foam-barrier layer webs 70 of any desired type, wherein foam strips 50, 60 and barrier layers 30 preferably alternate in a direction perpendicular to the conveying direction V4 and a foam strip 50, 60 is arranged on one edge of the foam-barrier layer web 70.

Because the connecting layer 80 forms the only connection between the foam strips 50, 60 in the sealing tape 2 and is usually limp, the connecting layer 80 and thus also the sealing tape 2 can be bent along the transition between individual foam strips 50, 60, which also makes possible other installation variants, e.g., the simultaneous sealing of two joints meeting at a right angle.

In addition, a small or large gap can be present between one or all of the foam strips 50, 60 of the sealing tape 2, this gap being bridged only by the connecting layer 80. Thus it is also possible to realize sealing tapes 2 which require the use of only a relatively small amount of material and yet are able to seal relatively wide joints.

Within the scope of this application, a “barrier layer” 30 is understood to be a layer which is able to reduce the passage of air or the diffusion of water vapor through the sealing tape 2. A complete blockage against the passage of air or against the diffusion of vapor is possible but not mandatory. It can be advisable, for at least one barrier layer 30 to be humidity-variable so that, at high humidity, it is more resistant to diffusion than at low humidity or vice versa.

With respect to the materials which can be used for the barrier layer, reference can be made to, for example, DE 10 2010 055 788 A1 or to EP 2 733 271 A1.

In addition to the property of reducing or preventing the diffusion of water vapor, it is especially important for each barrier layer 30 to be permanently elastic, so that, even after storage of the sealing tape 1 in the compressed state, it remains elastic upon the recovery of the sealing tape 2, and, in the installed state of the sealing tape 2 in a joint, rests tightly against the sides of the joint at all times.

Claims (7)

A method of producing a sealing strip roll (1) of soft compressed foam having at least one barrier layer (30) extending in the radial direction and axially disposed between two layers of foam, the method being characterized by the following steps of the provided: - providing at least one first soft foam foam strip (50) provided with at least one barrier layer (30) on at least one of its side edges, - providing at least one other soft foam foam strip (60), - joining of the at least one first foam strip (50) with the at least one second foam strip (60) such that a web (70) of foam barrier layer is formed, wherein the at least one barrier layer (30) is disposed between foam strips (50, 60). ) adjacent to each other; applying a common connecting layer (80) to all the foam strips (50, 60) of the web (70) of foam barrier layers on a surface extending perpendicular to the at least one barrier layer (30); and - winding the web (70) of foam barrier layers to a sealing tape roller (1). Method according to claim 1, characterized in that the provision of the at least one first foam strip (50) comprises the following steps: - providing a first foam web (20) of a soft foam; applying at least one barrier layer (30) to at least the upper side (21) or the underside (22) of the foam web (20) to produce a laminated foam web (34); and - placing at least one continuous cut (40) in the laminated foam web (34) longitudinally of the laminated foam web (34) to produce a plurality of first foam strips (50) provided with barrier layers (30). Method according to claim 2, characterized in that the provision of the first foam web (20) comprises the following steps: - providing a first roller (10) with the wound first foam web (20); and - unwinding the first foam web (20) from the first roll (10). Method according to claim 2 or 3, characterized in that the first foam web (20) provided is impregnated. Method according to claim 2 or 3, characterized in that the first foam web (20) provided is not impregnated and the method comprises the following steps after the step of applying the at least one barrier layer (30): - impregnation of the laminated foam web (34) ) with an impregnating agent (94); and - drying the impregnated laminated foam web (34). Method according to any one of claims 2 to 5, characterized in that the at least one continuous cut (40) is made in the laminated foam web (34) by at least one knife (38) or at least one saw. Method according to any one of the preceding claims, characterized in that the connecting layer (80) is a double-sided adhesive tape which is laminated on the side thereof which faces away from the foam strips (50, 60).