EP3851625B1 - Seal strip roll and method for the production thereof - Google Patents

Description

Sealing tapes unwound from sealing tape rolls are usually used to seal joints, for example between a frame profile of a window or a door and a building wall, in order to seal the joints against drafts and driving rain. Films additionally provided on a side flank of the sealing tape also reduce the same vapor permeability, see eg EP 0 072 955 A1 or EP 1 936 246 A1 .

Out of DE 196 41 415 A1 a roll of sealing tape is known which has at least one barrier layer running in the radial direction, which is arranged between two layers of the foam and thus inside the roll of sealing tape. The barrier layer consists of adhesive or a laminating material.

Out of EP 2 990 551 A1 Another roll of sealing tape with an internal, radially extending barrier layer is known. In addition, a method for their production is specified, which is simple and reliable and with which long lengths of sealing tape rolls can also be produced.

The present invention is based on the object of specifying a method for producing a sealing tape roll with a sealing tape, the sealing tape ensuring a particularly secure seal when installed on the contact surface to the masonry and the sealing tape roll being able to be produced with relatively little effort.

• Bereitstellen einer Schaumstoff-Sperrschicht-Bahn, die mindestens einen weichen, nach Kompression rückstellfähigen Schaumstoffkörper und mindestens eine Sperrschicht umfasst, wobei die Schaumstoff-Sperrschicht-Bahn eine Oberseite, eine Unterseite und zwei die Oberseite und die Unterseite verbindende Seitenflanken aufweist, wobei eine Querrichtung der Schaumstoff-Sperrschicht-Bahn parallel zur Unterseite der Schaumstoff-Sperrschicht-Bahn von einer Seitenflanke zur anderen Seitenflanke verläuft, und wobei eine Längsrichtung der Schaumstoff-Sperrschicht-Bahn parallel zur Unterseite der Schaumstoff-Sperrschicht-Bahn und senkrecht zur Querrichtung ausgerichtet ist, und wobei die mindestens eine Sperrschicht sich nur von der Oberseite der Schaumstoff-Sperrschicht-Bahn aus im Wesentlichen geradlinig in Richtung der Unterseite der Schaumstoff-Sperrschicht-Bahn erstreckt, aber nicht auf der Oberseite der Schaumstoff-Sperrschicht-Bahn erstreckt;
• gezieltes Komprimieren mindestens eines vorbestimmten Abschnitts der Schaumstoff-Sperrschicht-Bahn und dadurch Verformen der mindestens einen Sperrschicht derart, dass sie zumindest in einem oberen Bereich eine gebogene oder abgewinkelte Form aufweist;
• zusätzliches Komprimieren der gesamten Schaumstoff-Sperrschicht-Bahn während des gezielten Komprimierens oder nach dem gezielten Komprimieren unter Beibehaltung der bei der gezielten Komprimierung erzielten gebogenen oder angewinkelten Form der mindestens einen Sperrschicht; und
• Bilden einer Dichtbandrolle durch
  1. (i) Aufwickeln der Schaumstoff-Sperrschicht-Bahn im komprimierten Zustand um eine Drehachse zu der Dichtbandrolle; oder
  2. (ii) Aufwickeln der Schaumstoff-Sperrschicht-Bahn im komprimierten Zustand um eine Drehachse zu einer Zwischenrolle und Durchtrennen der Zwischenrolle an einer oder an mehreren Stellen in einer axialen Richtung, um eine Mehrzahl von Dichtbandrollen zu erzeugen, die weniger breit sind als die Zwischenrolle; oder
  3. (iii) Durchtrennen der komprimierten Schaumstoff-Sperrschicht-Bahn in Längsrichtung zur Bildung von komprimierten Schaumstoff-Sperrschicht-Streifen und Aufwickeln der komprimierten Schaumstoff-Sperrschicht-Streifen um eine Drehachse zu einzelnen Dichtbandrollen.

The method according to the invention for producing a roll of sealing tape comprises the following steps:

• Providing a foam barrier web comprising at least one soft, compression-recoverable foam body and at least one barrier layer, the foam barrier web having a top, a bottom, and two side flanks connecting the top and bottom, wherein a transverse direction of the The foam barrier web extends parallel to the underside of the foam barrier web from one side flank to the other side flank, and wherein a longitudinal direction of the foam barrier web is oriented parallel to the underside of the foam barrier layer web and perpendicular to the transverse direction, and wherein the least a barrier extends substantially linearly only from the top of the foam barrier web toward the bottom of the foam barrier web but does not extend on top of the foam barrier web;
• selectively compressing at least a predetermined portion of the foam barrier layer web and thereby deforming the at least one barrier layer such that it has a curved or angled shape at least in an upper region;
• additionally compressing the entire foam-barrier web during or after the selective compression while maintaining the curved or angled shape of the at least one barrier layer obtained during the selective compression; and
• forming a roll of sealing tape
  1. (i) winding the foam barrier sheet in the compressed state about an axis of rotation to the roll of sealing tape; or
  2. (ii) winding the foam barrier web in the compressed state about an axis of rotation into an intermediate roll and severing the intermediate roll at one or more locations in an axial direction to produce a plurality of sealant tape rolls narrower in width than the intermediate roll; or
  3. (iii) longitudinally severing the compressed foam barrier web to form compressed foam barrier strips and winding the compressed foam barrier strips about an axis of rotation into individual rolls of sealing tape.

In this way it is possible, with relatively little equipment, to produce a roll of sealing tape whose sealing tape ensures a particularly tight fit of the barrier layer on the masonry even in the partially compressed installation state.

In the fully expanded state of the foam barrier layer web, the at least one barrier layer preferably extends over the entire height of the foam barrier layer web.

In one embodiment, a functional direction of the sealing tape wound up to form the sealing tape roll runs from one end face to the other end face of the sealing tape roll, and the at least one barrier layer runs in the compressed state of the sealing tape in the sealing tape roll, preferably in sections essentially transversely to the functional direction, more preferably radially, and the at least a barrier layer runs in the compressed Condition of the sealing tape in the sealing tape roll, also in sections between the base bodies of adjacent windings.

In a preferred embodiment, the at least one barrier layer covers a side flank of the foam barrier layer web and the targeted compression comprises deforming the side flank of the foam barrier layer web in such a way that an upper end section of the at least one barrier layer, which was previously arranged in the area of the side flank was, is bent inwards and thus also has an extension in the transverse direction of the foam barrier layer web. The extent in the transverse direction is more than 5 mm. In this way, the lateral bending of an upper section of the barrier layer arranged on the side flank is achieved with simple means.

In one embodiment, the at least one barrier layer is arranged inside the foam barrier layer web between two foam bodies and the targeted compression comprises deforming the foam barrier layer web such that an upper end portion of the at least one barrier layer previously between the top and bottom the foam barrier layer web was arranged, is bent over laterally and thus also has an extension in the transverse direction of the foam barrier layer web. The extent in the transverse direction is more than 5 mm. In this way, the lateral bending of an upper section of the barrier layer arranged inside the sealing strip is achieved with simple means.

The lateral bending of the at least one barrier layer succeeds particularly well if an area of a foam body which is arranged laterally from the at least one barrier layer is compressed in a targeted manner, the area preferably being arranged within 3 mm to 3 cm next to the barrier layer.

It is preferred that the targeted compression includes the step of using at least one compression element to selectively press in at least the upper side of the foam barrier layer web.

In preferred embodiments, the at least one compression element is designed as a compression stamp or as a compression wheel. It is also possible to have two opposing compression elements, for example two compression wheels, the top and bottom press in selectively on the foam barrier layer. This preferably results in a C-shape of the barrier layer in the specifically compressed state.

The compression plunger or wheel preferably has a width in the transverse direction of the foam barrier web of between 0.5 mm and 20 mm, more preferably between 1 mm and 10 mm, most preferably between 1 mm and 7 mm.

In a further embodiment, the targeted compression preferably includes the step of deforming an outer edge section of the foam barrier layer web by means of a shaping device, preferably a shaping shoulder, which exerts a direct force on the side flank.

The forming shoulder preferably has a forming surface which is C-shaped in cross section or is designed as a partial section of a C-shape.

In all variants, the foam barrier layer web is preferably moved longitudinally during the targeted compression. This ensures a continuous mechanical process.

It is preferred in all variants to apply an adhesive layer in an additional step in the area of the underside of the foam barrier layer web or the foam barrier layer strips. In the installation situation, this is used for attachment to a component, in particular a frame profile of a window or a door, and is or will generally also be covered with a removable cover film or cover paper.

It is preferred here to apply the adhesive layer after the targeted compression or the compression in the area of the underside of the foam barrier layer web or the foam barrier layer strips.

A roll of sealing tape produced by the method according to the invention comprises a sealing tape that is wound up in radially successive turns in a compressed state, which can be separated from one another again by unwinding, and has at least one base body made of a flexible foam material that is resilient after compression. The sealing tape has a bottom, a top, and first and second side flanks connecting the top and bottom to one another, with end faces of the roll of sealing tape being formed by the side flanks and extending substantially perpendicularly to a functional direction of the sealing tape. An adhesive layer for adhesion to a component, in particular a frame profile of a window or a door, is arranged in the area of the underside. The sealing tape has at least one barrier layer to reduce water vapor diffusion and/or air permeability in the functional direction, with the at least one barrier layer running essentially in a straight line from the top towards the bottom in a fully expanded state of the sealing tape, but not along the top. In the compressed state of the sealing tape in the sealing tape roll, the at least one barrier layer has a curved or angled shape at least in an upper region.

With this design, a sealing tape is created that is easy to produce and in its partially compressed installed state ensures a particularly secure contact of the at least one barrier layer on the masonry.

The at least one barrier layer preferably extends over the entire height of the base body when the sealing strip is in the fully expanded state. In this way, the sealing function of the sealing tape is optimized.

In the compressed state of the sealing tape in the sealing tape roll, the at least one barrier layer preferably runs in sections essentially transversely to the functional direction, more preferably radially, and in the compressed state of the sealing tape in the sealing tape roll, the at least one barrier layer preferably also runs in sections between the base bodies of adjacent windings. In this way, an angular arrangement of the barrier layer is achieved, which is retained for a certain period of time even while the sealing tape is rising after being unwound from the sealing tape roll and ensures a particularly secure system of the barrier layer when installed on the masonry.

The at least one barrier layer preferably completely covers the first side flank of the sealing strip both in the compressed state of the sealing strip in the sealing strip roll and in the fully expanded state of the sealing strip. This reduces the passage of water vapor and/or air on one side of the sealing tape. Preferably, a lower end section of the at least one barrier layer is folded inwards in the area of the underside, so that it is arranged within the sealing tape roll in the compressed state of the sealing tape, with the folded lower end section remaining folded inwards and permanently with the sealing tape even in the fully expanded state attached to the body. In this way, the tightness of the sealing strip is optimized in the area of its underside.

In a preferred embodiment, an upper end section of the at least one barrier layer is permanently attached to an upper end area of the first side flank when the sealing strip is in the fully expanded state.

In a further preferred embodiment, the at least one barrier layer runs in an interior of the roll of sealing tape and is surrounded axially by two mutually connected sections of the base body or by two separate base bodies.

In this case, it is preferred if the at least one barrier layer inside the roll of sealing tape is permanently attached to at least one, preferably exactly one, of the two sections of the base body connected to one another or to at least one, preferably exactly one of the two base bodies.

In preferred configurations, the at least one barrier layer is formed from a film-like material and/or an adhesive, in particular from a web of film, a film strip, a strip of adhesive tape or a cured adhesive-like liquid medium.

The at least one barrier layer preferably has a thickness of 1 μm to 5 mm, more preferably 10 μm to 3 mm, particularly preferably 50 μm to 2 mm. If there are two or more barrier layers, they may be of the same thickness or of different thicknesses.

The air permeability of the at least one barrier layer is preferably less than 50 l/(m2s), more preferably less than 20 l/(m2s), particularly preferably less than 10 l/(m2s), measured according to DIN EN ISO 9237:1995.

Any of the bases or foam strips described herein may be formed from any flexible open cell or mixed cell foam, for example polyurethane, and may be impregnated for delayed compression recovery. The density of such flexible foams is between 20 and 200 kg/m ³ .

The flexible foam preferably has a compressive strength 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 given 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.

The base bodies or foam strips are preferably at least partially and preferably completely impregnated with an impregnating agent for delayed recovery. The impregnating agent preferably has an acrylate dispersion. In an advantageous embodiment, the acrylate dispersion has acrylate polymer particles dispersed in a homogeneous phase. The foam is particularly preferably impregnated with a proportion by weight of acrylate dispersion for delayed recovery in such a way that the sealing tape at 20° C. and 50% relative humidity recovers in less than 24 hours from a degree of compression of the sealing tape of about 9% to 13% of the maximum expansion up to the joint closure.

Each foam barrier layer web provided has preferably previously gone through the steps of impregnating the foam with an aqueous polyacrylate dispersion and subsequent drying.

A foam of the base body or of the foam strip impregnated for delayed recovery preferably has an air permeability in a range from 50 to 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). The information on air permeability given in the context of this application relates to a determination under the standard conditions of a 10 mm thick piece of foam (completely relaxed) at a measuring vacuum of 1.0 bar, test area 100 cm ² ; Frank device 21443; DIN EN ISO 9237:1995.

Each of the barrier layers described herein can be formed from a film-like material, e.g., a polyamide film, or an adhesive, e.g., a dispersion adhesive, particularly an acrylate adhesive.

In a particularly preferred embodiment, the at least one barrier layer or one of a plurality of barrier layers is moisture-variable, i.e. its water vapor diffusion resistance changes depending on the humidity of the environment surrounding the barrier layer. Characteristic of the water vapor diffusion resistance is the water vapor diffusion value in relation to an air layer thickness in meters, the so-called sD value.

A barrier layer preferably has an sD value of from 0.05 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 (RH)). The sD value is tested according to DIN EN ISO 12572:2001. Regardless of this or in combination with this, the barrier layer can have an sD value of 0.02 m to 10 m or 0.03 m to 6 m or 0.05 m to 2 m at 72.5% rel. Have LF according to DIN EN ISO 12572:2001. For example, the sD value at 25% rel. LF in the range from 1 to 10m and at 72.5% rel. LF in the range of 0.1 to 5m. Unless otherwise specified according to DIN EN ISO 12572:2001, the sD values refer to a temperature of 20°C.

The sD value of a barrier layer at 25% on the one hand and at 72.5% relative humidity on the other hand (each at 20° C.) preferably differs by a factor of ≥ 1.1-1.2, preferably ≥ 1.5-2, optionally up to a factor of 3 to 5 or up to 10 to 20 or also up to 50 or up to 100 or 150 or more, which defines the dependence of the water vapor diffusion of the barrier layer on the atmospheric humidity. The difference between the two sD values of the barrier layer at the two specified relative humidities can be ≧0.25 m or ≧0.5 m or preferably ≧0.75-1 m, for example up to 5-10 m or up to 20-25 m or beyond. This results in a sufficient dependence of the water vapor diffusion resistance under different environmental conditions, for example in summer or winter or in different climate zones, in order to achieve sufficient adaptation of the water vapor diffusion resistance to the ambient conditions even with different relative humidity of the environment. The sD value at 25% rel. Air humidity is preferably the higher value compared to 72.5% air humidity.

The barrier layer preferably consists at least in part of a synthetic, water-swellable polymer.

The at least one barrier layer can also be multi-layered, in particular 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 in each case partially or completely cover the functional layer, can protect and carry or support it and increase the stability of the barrier layer. The individual layers can each consist of the same or different material.

The layers arranged on one or both sides can in particular be nonwovens, woven fabrics or grids made of inert materials such as polyethylene, polypropylene, polyester, glass fibers or viscose, optionally also perforated films, in particular those made of polyethylene, polypropylene or polyester. The layers can generally consist of any suitable material which is in the form of layers and preferably has no higher sD values than the functional layer. The layers arranged on one or both sides can consist of a dispersion adhesive, in particular an acrylate adhesive.

Within the scope of the invention, the at least one barrier layer preferably forms a continuous, non-porous and non-perforated layer, which is particularly preferably at least essentially impermeable to air. The air permeability of the barrier layer can be ≦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, Frank 21443 test device, or not measurable.

The overall reduction of an air flow in one direction over the entire cross section of the sealing strip section is generally decisive for the air permeability of a sealing strip section. If, for example, a plurality of barrier layers and base bodies are arranged alternately one behind the other in the functional direction of the sealing tape, the reduction in the air flow through all these barrier layers and base bodies must be taken into account.

In all of the embodiments, the air permeability of the entire sealing strip in the functional direction is preferably less than 50 l/(m ² s), more preferably less than 30 l/(m ² s), under the measurement conditions specified above.

In one embodiment, the sealing tape or the sealing tape roll produced according to the invention also includes an additional material that is applied to a surface of the sealing tape or to the at least one barrier layer or is contained in the impregnate. The additional material can give the sealing tape special properties. Additional materials include, in particular, materials for fire protection (e.g. expandable graphite, non-flammable solids, CO ₂ emitters, etc.), materials for insulation (e.g. PU foam, resins, sealants, etc.), materials for sealing against moisture (e.g. hydrophobic or hydrophilic Substances that swell on contact with water, etc.), materials for soundproofing, materials for controlled ventilation (e.g. catalytic converters, etc.), materials for hygiene (e.g. disinfectants, etc.) and/or materials to trigger the expansion of the sealing tape (e.g. propellant, heat sources, etc.) in question. The person skilled in the art can see alternatives with regard to the arrangement as well as the type and properties of the additional material, which can be used to meet the respective requirements.

If several base bodies or foam strips are formed next to one another, these are preferably made of the same material. Alternatively, the base body or foam strips can be made of different materials.

If there are multiple barrier layers, these may preferably be formed from the same material. Alternatively, the barrier layers can be formed from different materials.

It is also possible for several of the aforementioned alternatives to be present or used at the same time, insofar as this is technically possible.

In particular, a barrier layer can be arranged on exactly one side flank, or two barrier layers can be arranged on both side flanks without there being a barrier layer on the inside. Exactly one barrier layer on a side flank can also be combined with exactly one or more inner barrier layers. Likewise, two barrier layers on two side flanks can be combined with precisely one or with a plurality of inner barrier layers. Finally, there can also be exactly one inner barrier layer or there can be a plurality of inner barrier layers without a barrier layer on the side flank.

The step of selectively compressing can be done in different ways for different barrier layers and/or it can be done at different times for different barrier layers. However, the targeted compression step can also take place in the same way for different barrier layers and/or it can take place for different barrier layers at the same time.

The preferred application of the adhesive layer in the area of the underside of the foam barrier layer web can take place at different times: before the targeted compression, during the targeted compression, after the targeted compression and before the compression of the entire foam barrier layer web, during compression the entire foam barrier web, after compressing the entire foam barrier web, and optionally after compressing the entire foam barrier strips and longitudinally severing the compressed foam barrier web to form compressed foam barrier -Stripes.

Each adhesive layer in the context of the present application is preferably a self-adhesive layer, particularly preferably a double-sided adhesive tape.

Fig. 1

ist eine Perspektivansicht einer Ausführungsform einer mit dem erfindungsgemäßen Verfahren hergestellten Dichtbandrolle mit einem teilweise abgewickelten Dichtbandabschnitt;

Fig. 2a bis 2c

sind Querschnittsansichten des Dichtbands der Dichtbandrolle aus Fig. 1 in einem vollständig expandierten Zustand (Fig. 2a), einem komprimierten Zustand in der Dichtbandrolle (Fig. 2b) und einem teilkomprimierten Zustand wie bei einer Einbausituation (Fig. 2c);

Fig. 3a bis 3c

sind Querschnittsansichten einer alternativen Ausgestaltung eines mit dem erfindungsgemäßen Verfahren hergestellten Dichtbands in einem vollständig expandierten Zustand (Fig. 3a), einem komprimierten Zustand in der Dichtbandrolle (Fig. 3b) und einem teilkomprimierten Zustand wie bei einer Einbausituation (Fig. 3c);

Fig. 4a bis 4c

sind Querschnittsansichten einer alternativen Ausgestaltung eines mit dem erfindungsgemäßen Verfahren hergestellten Dichtbands in einem vollständig expandierten Zustand (Fig. 4a), einem komprimierten Zustand in der Dichtbandrolle (Fig. 4b) und einem teilkomprimierten Zustand wie bei einer Einbausituation (Fig. 4c);

Fig. 5a bis 5c

sind Querschnittsansichten einer alternativen Ausgestaltung eines mit dem erfindungsgemäßen Verfahren hergestellten Dichtbands in einem vollständig expandierten Zustand (Fig. 5a), einem komprimierten Zustand in der Dichtbandrolle (Fig. 5b) und einem teilkomprimierten Zustand wie bei einer Einbausituation (Fig. 5c);

Fig. 6a bis 6c

sind Querschnittsansichten einer alternativen Ausgestaltung eines mit dem erfindungsgemäßen Verfahren hergestellten Dichtbands in einem vollständig expandierten Zustand (Fig. 6a), einem komprimierten Zustand in der Dichtbandrolle (Fig. 6b) und einem teilkomprimierten Zustand wie bei einer Einbausituation (Fig. 6c);

Fig. 7

ist eine Querschnittsansicht einer Einbausituation des Dichtbands aus der Dichtbandrolle gemäß Fig. 1, wobei das Dichtband in einem teilkomprimierten Einbauzustand vorliegt;

Fig. 8

ist eine schematische Perspektivansicht von möglichen konstruktiven Umsetzungen der Schritte des erfindungsgemäßen Verfahrens zur Herstellung einer Dichtbandrolle;

Fig. 9

ist eine schematische Querschnittsansicht einer möglichen konstruktiven Umsetzung des gezielten Komprimierens der Schaumstoff-Sperrschicht-Bahn im Rahmen des erfindungsgemäßen Verfahrens zur Herstellung einer Dichtbandrolle;

Fig. 10

ist eine schematische Perspektivansicht einer weiteren möglichen konstruktiven Umsetzung des gezielten Komprimierens der Schaumstoff-Sperrschicht-Bahn im Rahmen des erfindungsgemäßen Verfahrens zur Herstellung einer Dichtbandrolle;

Fig. 11

ist eine Querschnittsansicht eines Auslaufbereichs der Komprimiervorrichtung aus Fig. 10;

Fig. 12

ist eine schematische Perspektivansicht einer möglichen konstruktiven Umsetzung eines optionalen alternativen Schritts des erfindungsgemäßen Verfahrens zur Herstellung einer Dichtbandrolle;

Fig. 13

ist eine schematische Perspektivansicht einer möglichen konstruktiven Umsetzung eines anderen optionalen alternativen Schritts des erfindungsgemäßen Verfahrens zur Herstellung einer Dichtbandrolle;

Fig. 14

ist eine schematische Querschnittsansicht einer möglichen Anordnung zum gezielten Komprimieren der Schaumstoff-Sperrschicht-Bahn bei der Herstellung einer Dichtbandrolle, die das Dichtband gemäß Fig. 4a umfasst;

Fig. 15

ist eine schematische Querschnittsansicht einer möglichen Anordnung zum gezielten Komprimieren der Schaumstoff-Sperrschicht-Bahn bei der Herstellung einer Dichtbandrolle, die das Dichtband gemäß Fig. 5a umfasst; und

Fig. 16

ist eine schematische Querschnittsansicht einer möglichen Anordnung zum gezielten Komprimieren der Schaumstoff-Sperrschicht-Bahn bei der Herstellung einer Dichtbandrolle, die das Dichtband gemäß Fig. 6a umfasst.

Further advantages and features of the present invention result from the following description of the figures.

1

Figure 13 is a perspective view of one embodiment of a roll of sealant tape made by the method of the present invention with a partially unwound portion of sealant tape;

Figures 2a to 2c

12 are cross-sectional views of the sealing tape of the sealing tape roll 1 in a fully expanded state ( Figure 2a ), a compressed state in the sealing tape roll ( Figure 2b ) and a partially compressed state as in an installation situation ( Figure 2c );

Figures 3a to 3c

are cross-sectional views of an alternative embodiment of a sealing tape produced with the method according to the invention in a fully expanded state ( Figure 3a ), a compressed state in the sealing tape roll ( Figure 3b ) and a partially compressed state as in an installation situation ( 3c );

Figures 4a to 4c

are cross-sectional views of an alternative embodiment of a sealing tape produced with the method according to the invention in a fully expanded state ( Figure 4a ), a compressed state in the sealing tape roll ( Figure 4b ) and a partially compressed state as in an installation situation ( Figure 4c );

Figures 5a to 5c

are cross-sectional views of an alternative embodiment of a sealing tape produced with the method according to the invention in a fully expanded state ( Figure 5a ), a compressed state in the sealing tape roll ( Figure 5b ) and a partially compressed state as in an installation situation ( Figure 5c );

Figures 6a to 6c

are cross-sectional views of an alternative embodiment of a sealing tape produced with the method according to the invention in a fully expanded state ( Figure 6a ), a compressed state in the sealing tape roll ( Figure 6b ) and a partially compressed state as in an installation situation ( Figure 6c );

7

13 is a cross-sectional view of an installation situation of the sealing tape from the sealing tape roll according to FIG 1 , wherein the sealing strip is in a partially compressed installed state;

8

is a schematic perspective view of possible constructive implementations of the steps of the method according to the invention for producing a roll of sealing tape;

9

is a schematic cross-sectional view of a possible constructive implementation of the targeted compression of the foam barrier layer web in the context of the method according to the invention for producing a roll of sealing tape;

10

is a schematic perspective view of another possible constructive implementation of the targeted compression of the foam barrier layer web in the context of the method according to the invention for producing a sealing tape roll;

11

Fig. 12 is a cross-sectional view of a discharge area of the compression device 10 ;

12

is a schematic perspective view of a possible constructive implementation of an optional alternative step of the method according to the invention for the production of a sealing tape roll;

13

is a schematic perspective view of a possible constructive implementation of another optional alternative step of the method according to the invention for the production of a sealing tape roll;

14

Fig. 12 is a schematic cross-sectional view of one possible arrangement for selectively compressing the foam barrier web in the manufacture of a roll of sealing tape incorporating the sealing tape of Figs Figure 4a includes;

15

Fig. 12 is a schematic cross-sectional view of one possible arrangement for selectively compressing the foam barrier web in the manufacture of a roll of sealing tape incorporating the sealing tape of Figs Figure 5a includes; and

16

Fig. 12 is a schematic cross-sectional view of one possible arrangement for selectively compressing the foam barrier web in the manufacture of a roll of sealing tape incorporating the sealing tape of Figs Figure 6a includes.

In 1 a sealing tape roll 2 is shown, in which a sealing tape 3 is wound up in radially consecutive turns 5 . The windings 5 can be detached from one another again by unwinding, as in 1 is shown.

In 1 the sealing tape 3 is shown in two different states of compression, a fully compressed state within the windings 5 of the sealing tape roll 2, and a fully expanded state, which the sealing tape, due to its delayed recovery properties, which are achieved by suitable impregnation, only after a few minutes up to takes up to several hours after unwinding from the sealing tape roll 2. In an installation situation as in 7 is shown, the sealing tape 3 is in a partially compressed intermediate state, in which the sealing tape 3 is less compressed than in the compressed state in the sealing tape roll 2, but is compressed more than in the fully expanded state.

The sealing tape 3 off 1 has at least one base body 4 made of a flexible foam material that is resilient after compression. The sealing strip 3 comprises a top 6, a bottom 8 and a first side flank 10 and a second side flank 12, which connect the top 6 and the bottom 8 to one another.

End faces of the sealing tape roll 2 are formed by sections of the two side flanks 10, 12 or by the entire side flanks 10, 12 and extend essentially perpendicularly to a functional direction F of the sealing tape 3, which corresponds to a transverse direction Q of the sealing tape 3. The sealing tape 3 is wound around an axis of rotation A in the sealing tape roll 2 in such a way that the sealing tape 3 is pulled off in a longitudinal direction L during unwinding, which is perpendicular to the transverse direction Q or functional direction F and perpendicular to the axis of rotation A.

In the 1 Illustrated embodiment of the sealing tape roll 2 including the above features applies to all embodiments of sealing tape rolls 2 with sealing tapes 3, as will be described below.

In the Figures 2a to 6c The illustrated cross sections of sealing strips 3 each represent sections through a plane of the sealing strip 3 which is parallel to the transverse direction Q and perpendicular to the longitudinal direction L.

In the Figure 2a The illustrated embodiment of the sealing strip 3 comprises a barrier layer 18 to reduce water vapor diffusion and/or air permeability in the functional direction F, which is attached to the first side flank 10 of the sealing strip 3 . The barrier layer 18 runs in the in Figure 2a fully expanded state of the sealing strip 3 shown essentially in a straight line from the upper side 6 in the direction of the lower side 8, but not along the upper side 6. In the fully expanded state of the sealing strip 3, the barrier layer 18 extends over the entire height of the base body 4 and covers the side flank 10 complete.

In the area of the underside 8 there is an adhesive layer 14 for adhesion to a component 30 (see 7 ), In particular a frame profile of a window or door arranged.

Also in the in Figure 2b shown compressed state in the sealing tape roll 2, the barrier layer 18 covers the first side edge 10 of the sealing tape 3 completely.

How out Figure 2b It can also be seen that the barrier layer 18 in the compressed state of the sealing strip 3 has an angled shape in an upper area, here specifically the upper end section 20 . This upper area 20 runs in the compressed state of the sealing tape 3 in the sealing tape roll 2 between the base bodies 4 of adjacent windings 4. The other area of the barrier layer 18, on the other hand, runs in the compressed state of the sealing tape 3 in the sealing tape roll 2 essentially transversely to the functional direction F. If , as in the embodiment of Figures 2a to 2c shown, the barrier layer 18 is adhered to the entire surface of the base body 4, the side flank 10 of the base body 4 will deform together with the barrier layer 18 in small bulges. The bulges shown in the side flank 10 are only to be seen as schematic consider and are somewhat less developed in reality. There are comparable bulges in the second side flank 12, but they are not shown in any of the figures.

in the in Figure 2c shown partially compressed state of the sealing strip 3, which is an installation situation of the sealing strip 3 according to 7 corresponds, the upper end section 20 has migrated a little in the direction of the first side flank 10 in comparison to the compressed state from FIG. However, in the installed situation, it still forms a section that separates the base body 4 from the building wall 32, as in 7 is shown. The result of this is that the barrier layer 18 is not only in contact with the building wall 32 along a line, but rather along a surface, and thus a secure seal and the avoidance of passage channels can be ensured. Even in the partially compressed state, the bulges in the side flanks are still present, albeit less pronounced than in the compressed state.

In the Figures 3a to 3c illustrated embodiment of the sealing strip 3 differs from the embodiment according to Figures 2a to 2c in that a lower end section 22 of the barrier layer 18 is folded inward in the area of the underside 8 so that in the compressed state of the sealing strip 3 ( Figure 3b ) is arranged within the sealing tape roll 2. The folded lower end portion 22 is also in the fully expanded state of the sealing tape ( Figure 2a ) and in the partially compressed state ( 3c ) turned inwards and permanently attached to the base body 4.

in 3c The partially compressed state shown is the same as in the compressed state according to FIG Figure 3b a barrier layer 18 in each case, which not only covers the side flank 10, but also the adjoining edge regions of the upper side 6 and lower side 8 of the base body 4.

In the fully expanded state according to Figure 3a on the other hand, only the lower edge of the side flank 10 is covered with the turned-over barrier layer 18 , while the barrier layer 18 ends flush at the upper edge of the side flank 10 .

It is also conceivable to equip both side flanks 10, 12 with corresponding barrier layers 18 according to one of the preceding exemplary embodiments.

It is also conceivable for the barrier layer 18 not to be adhered to the base body 4 continuously, but only at certain points or in sections. In any case, it is important to make a bond between the barrier layer 18 and the base body 4 in the area of the upper end section 20 and, if present, in the area of the lower end section 22.

in the in Figures 4a to 4c In the illustrated embodiment of the sealing strip 3, two barrier layers 18 are arranged inside the sealing strip 3 and are each surrounded by two base bodies 4 on both sides. The two barrier layers 18 are preferably attached to the central base body 4 .

Apart from the position of each of the barrier layers 18 within the sealing tape 3, the same explanations apply as for the barrier layer 18 of the embodiments according to FIG Figures 2a to 2c and Figures 3a to 3c were made. How out Figure 4b As can be seen, the two upper end sections 20 of the two barrier layers 18 each face one another, with a section of the base body 4 still being exposed between them.

In this respect shows Figure 4b a design in which the two barrier layers 18 run in an interior of the sealing tape roll 2 and are surrounded axially by two separate base bodies 4 .

The embodiment according to Figures 5a to 5c corresponds to the embodiment according to Figures 4a to 4c except for the fact that the two barrier layers 18 are only attached to the two outer base bodies 4 in each case. In the compressed state according to Figure 5b This results in an alignment of the upper end sections 20 of the barrier layers 18 , which face away from one another and are each aligned in the direction of the closer side flank 10 , 12 of the sealing strip 3 .

In the Figures 6a to 6c illustrated embodiment of the sealing tape 3 differs from the embodiments according to Figures 4a to 5c in that four barrier layers 18 are provided, which are each adhered to mutually facing surfaces of the three base bodies 4. The barrier layers 18 adjoining one another are preferably not bonded to one another. in the in Figure 6b shown compressed state thus results on the top 6 of the sealing strip 3, an arrangement of four upper end portions 20 of Barrier layers 18, each pair of adjacent upper end portions 20 extending in opposite directions.

In the embodiments according to Figures 4a to 6c it is also conceivable that the barrier layers 18 are attached to all adjacent structural elements. For example, the two barrier layers 18 in Figures 4a to 4c or. Figures 5a to 5c be arrested not only with an adjacent base body 4, but also with both adjacent base bodies 4. It is also conceivable that two adjacent barrier layers 18 in the embodiment according to Figures 6a to 6c are attached to each other. In these cases, however, the courses of the barrier layers 18 are different in the compressed and partially compressed state.

The barrier layers 18 in all the exemplary embodiments mentioned can also not extend continuously but only partially from the upper side 6 of the sealing strip in the direction of the underside 8 . If this is the case in accordance with the exemplary embodiments Figures 4a to 6c is used, a connecting web remains in a lower region of the sealing tape between sections of the same base body 4 that are connected to one another.

In the embodiments according to Figures 4a to 5c only one barrier layer 18 can be provided, or more than two barrier layers 18 can be provided. Likewise, in the embodiment according to Figures 6a to 6c only two barrier layers 18 may be provided or more than four barrier layers 18 may be provided.

It is possible to combine all of the aforementioned exemplary embodiments with one another, for example to combine a barrier layer 18 on one or more of the side flanks 10, 12 with one or more barrier layers 18 on the inside.

In all exemplary embodiments, the barrier layer 18 must be attached to the base body 4 at least in the upper end section 20 . Consistent arrest is beneficial.

The barrier layers 18 are in accordance with the embodiments Figures 4a to 6c also in the compressed state ( Figure 4b , 5b , 6b ) and in the partially compressed state ( Figure 4c , 5c , 6c ) drawn as straight lines. In reality, the barrier layer 18 together with the adjoining base body 4 or the adjoining base bodies 4 usually does not run linearly in these areas either, but shows certain bulges due to the compression effects, as shown in FIG Figures 2a to 3c explained. For the sake of simplicity, this is in the Figures 4b, 4c , 5b, 5c , 6a and 6c not shown.

In 8 a possible line for carrying out the method according to the invention for producing a sealing tape roll 2 is shown schematically. First, a foam barrier web 24 is provided comprising at least one soft, compression-recoverable foam body 26 and at least one barrier layer 18 . In the present example there is exactly one foam body 26 with exactly one barrier layer 18 .

How out 9 As shown, the foam barrier sheet 24 includes a top 46, a bottom 48, and two side flanges 50, 52 connecting the top 46 and bottom 48 together. A transverse direction Q of the foam barrier layer web 24 extends parallel to the underside 48 of the foam barrier layer web 24 from the first side flank 50 to the second side flank 52. A longitudinal direction L of the foam barrier layer web 24 is parallel to the underside 48 of the foam barrier web 24 and oriented perpendicular to the cross direction Q .

The barrier layer 18 extends only from the top 46 of the foam barrier sheet 24 in a substantially straight line toward the bottom 48 of the foam barrier sheet 24, and preferably continuously to the bottom 48, but does not extend on the top 46 of the foam - Barrier sheet 24. In the illustrated example, the barrier 18 is adhered to and completely covers the entire first side flank 50 of the foam barrier sheet 24 . The foam barrier web 24 is preferably provided in a fully expanded state. The foam barrier sheet 24 is impregnated for delayed recovery as described in more detail above with the sealing tapes.

As the foam barrier web 24 continues to move in the longitudinal direction L, it passes through an in 8 Compression device 28, shown only schematically, for the targeted compression of at least a predetermined section of the foam barrier layer web 24. Possible embodiments of the compression device 28 for targeted compression are described further below with reference to FIG Figures 9 to 11 described.

The entire foam barrier layer web 24 is then additionally compressed by means of second compression rollers 34, 36, while maintaining the curved or angled shape of the barrier layer 18 achieved during the targeted compression.

An adhesive layer 14 is then applied to the underside 48 of the foam barrier layer web 24, which adhesive layer 14 is provided on a roll 38, preferably in a state covered on one side, and is applied to the underside 48 of the foam barrier layer web, for example by means of one or two pressure rollers 40 24 is applied. Due to the fact that the foam barrier sheet 24 is impregnated with a saturant that provides delayed recovery after compression of the foam body 26, the foam barrier sheet 24 remains in a compressed state after the compression process. The adhesive layer 14 can thus be applied to the foam barrier layer web 24 in the compressed state and the compressed foam barrier layer web 24 provided with the adhesive layer 14 can be wound up around the axis of rotation A to form the sealing tape roll 2 .

The application of the adhesive layer 14 can, as in 8 shown, take place during the winding process to form the sealing tape roll 2 by using the same pressure roller 40 for pressing the adhesive layer 14 onto the foam barrier layer web 24, which also provides the necessary contact pressure when winding up the sealing tape roll 2. It is also conceivable that the adhesive layer 14 is applied to the foam barrier layer web 24 in the area between the compression rollers 34, 36 and the sealing tape roll 2 by means of two additional pressure rollers 40, or that the adhesive layer 14 is fed between the two compression rollers 34, 36 and is applied to the foam barrier layer web 24 by its contact pressure.

Instead of the sequential arrangement of the compression device 28 for the targeted compression of a predetermined section of the foam barrier layer web 24 and the two compression rollers 34, 36, it is also conceivable to carry out both processes simultaneously in different sections lying next to one another in the transverse direction Q of the foam barrier layer web 24 of the foam barrier layer web 24 to perform. For example, the first side flank 50 could be selectively deformed by means of the compression device 28 while the remaining width of the foam barrier layer web 24 is continuously compressed with compression rollers 34, 36 arranged next to the compression device 28.

In 9 One way of configuring the compression device 28 to selectively compress a portion of the foam barrier layer web 24 is illustrated. the inside 9 The cross-section shown is a section in a plane parallel to the transverse direction Q and perpendicular to the longitudinal direction L.

In the example case 9 the side flank 50 of the foam barrier layer web 24 is specifically deformed in such a way that an upper end section 42 of the barrier layer 18, which was previously arranged in the area of the side flank 50, is bent inwards and the barrier layer 18 thus has a curved or angled shape. The barrier layer 18, which previously ran linearly perpendicularly along the side flank 50, is thus bent laterally with the side flank 50 and thus also includes an extension in the transverse direction Q of the foam barrier layer web 24. The greater the targeted compression, the stronger it is Bending of the barrier layer 18. The bending can also be so strong that the upper end section 42 of the barrier layer 18 runs in a partial area completely in the transverse direction Q of the foam barrier layer web 24 or even in the direction of the underside 48 of the foam barrier layer web 24 shows.

The compression device 28 is in the example 9 equipped with two compression members 54 acting on the top 46 and bottom 48 of the foam barrier sheet 24, respectively. In the case illustrated, the compression elements 54 are compression wheels which face one another and compress the foam body 26 between them. Because of the delayed resilience properties of the foam body 26, it remains in the specifically compressed state after the compression process until further processing.

Instead of compression wheels, correspondingly shaped, narrow compression stamps with a flat and smooth surface can also be used as compression elements 54, which extend in the longitudinal direction L of the foam barrier layer web 24 and preferably converge in the direction of movement of the foam barrier layer web 24.

Likewise, it is conceivable that the compression device 28 has only one compression element 54, which acts on the upper side 46 of the foam barrier layer web 24, while the lower side 48 of the foam barrier layer web 24 is guided on a hard surface 56, as is the case in Figures 14 to 16 is shown schematically. The hard base 56 is then preferably a rigid plate that has a smooth surface facing the foam barrier sheet 24 .

The area of the foam strip 26 that is specifically compressed by the compression device 28 is arranged to the side of the barrier layer 18, preferably within 3 mm to 3 cm next to the barrier layer 18. Because the compression element or elements 54 preferably compress the foam body 26 only at certain points, For example, the compression element or elements 54 have a width in the transverse direction Q of the foam barrier layer web 24 of between 0.5 mm and 20 mm.

In 10 An alternative embodiment of the compression device 28 for selectively compressing a portion of the foam barrier web 24 is shown. In this case, the compression device 28 includes a forming shoulder 58 having a forming surface that is C-shaped in cross-section or formed as a partial portion of a C-shape. As it passes through the forming shoulder 58, the edge portion of the foam barrier layer web 24 received in the forming shoulder 58 is compressed and at the same time converted into a curved shape.

11 shows a corresponding cross section in the starting area of the forming shoulder 58. In 10 For purposes of illustration, only the edge portion of the foam barrier web 24 being deformed by the forming shoulder 58 is shown, with the remainder of the foam barrier web 24 being cut away. 11 Figure 12 shows this other portion of the foam barrier web 24 in cross-section. As well are the compression rollers 34, 36 in 10 only partially shown. In actuality, they extend across the entire width of the foam barrier sheet 24 in the transverse direction Q and thus in 10 further out of the drawing plane.

Both in the configuration of the compression device 28 according to 9 as well as according to the design 10 and 11 the side flank 50 is folded inwards to form a C-shape both in the upper end area and in the lower end area. It is also conceivable to only bend the upper end section of the side flank 50 inwards. For this purpose, it is sufficient to use a compression element 54 in the area of the upper side 46 of the foam barrier layer web 24 or a forming shoulder 58 is used, which causes a narrowing of the foam barrier layer web 24 in the area of the side flank 50 only in the upper area, while the lower part of the side flank 50 is not subject to any force. Accordingly, this corresponds to the in Figures 9 to 11 illustrated embodiments of the compression device 28 produced sealing tape 3 in Figures 3a to 3c illustrated variant of the sealing tape. If only one compression element 54 is used on the upper side 46 of the foam barrier layer web 24 or a shape of the forming shoulder 58 that only deforms the upper area of the foam barrier layer web 24 in the area of the side flank 50, a sealing tape 3 according to in Figures 2a to 2c illustrated embodiment generated.

12 shows an alternative of the final process step in the production of a sealing tape roll 2. Instead of, as in 8 shown to wind up the foam barrier layer web 24 in the compressed state directly to the sealing tape roll 2, as in FIG 12 shown, it is also conceivable to wind up the foam barrier layer web 24 in the compressed state about the axis of rotation A to form an intermediate roll 60 and to cut through the intermediate roll 60 at one point in the axial direction by means of a cutting device 62 in order to produce a plurality of sealing tape rolls 2, which are less wide than the intermediate roll 60. In the present example, the intermediate roll 60 is severed exactly once in the middle, so that two rolls of sealing tape 2 are produced. In the present example, both end faces of the intermediate roller 60 are provided with a barrier layer 18, which is also folded inwards.

The section of the barrier layer 18 that is folded over in each case lies inside the roll of sealing tape 2 between the individual turns 5 and cannot be seen from the outside. It is nevertheless included for illustrative purposes 12 marked with dashed lines.

In this way, the severing creates two symmetrical rolls of sealing tape 2 with the additional advantage that the separating surface created by the cut is absolutely flat. More than two rolls of sealing tape 2 can also be produced simultaneously in this way.

In 13 a further alternative of the final steps for the production of sealing tape rolls 2 is shown. The compressed foam barrier layer web 24 is severed in the longitudinal direction L by means of a cutting device 64 to form compressed foam barrier layer strips 70, and the compressed foam barrier layer strips 70 are each turned about an axis of rotation A, A' to form individual sealing tape rolls 2 coiled. The axes of rotation A and A' can also coincide.

At the in 13 front sealing tape roll 2 is the inwardly folded portion of the barrier layer 18 in turn inside the sealing tape roll 2 between the individual windings 5 and is not visible from the outside. However, it is marked with dashed lines for illustrative purposes.

In the case of 13 it is conceivable to equip the foam barrier layer web 24 with the adhesive layer 14 before cutting through, or to equip the foam barrier layer strips 70 formed by the cutting with an adhesive layer 14 before they are wound up to form the sealing tape rolls 2.

The sealing tape rolls 2 in 13 are rolled up in different configurations, one with the adhesive layer 14 facing in and one with the adhesive layer 14 facing out. Unlike in 13 shown, all rolls of sealing tape 2 can also be wound up in the same configuration, either with the adhesive layer 14 facing outwards or with the adhesive layer 14 facing inwards.

In 13 exactly two rolls of sealing tape 2 are produced. However, more than two rolls of sealing tape 2 can also be produced simultaneously in this way.

In 14 one possibility is shown of how the targeted compression can take place in order to form a sealing strip 3 according to the Figures 4a to 4c produce illustrated embodiment.

The deformation on the upper side 46 of the foam barrier layer web 24 takes place centrally by means of the compression device 28 or the compression element 54. The underside 48 of the foam barrier layer web 24, on the other hand, is supported on a hard base 56 and is not deformed.

In this embodiment, the two barrier layers 18 are preferably adhered to the middle one of the three foam bodies 26 but are not adhered to the two outer foam bodies 26 . However, it is also conceivable to attach the barrier layers 18 to all three foam bodies 26 .

In 15 one possibility is shown of how the targeted compression can take place in order to form a sealing strip 3 according to the Figures 5a to 5c produce illustrated embodiment.

The deformation on the upper side 46 of the foam barrier layer web 24 takes place at the two edge regions of the foam barrier layer web 24 by means of the compression elements 54. The underside 48 of the foam barrier layer web 24, on the other hand, is supported on a hard subsurface 56 and is supported not deformed.

In this embodiment, the two barrier layers 18 are preferably attached to the two outer foam bodies 26, but not to the middle foam body 26. It is also conceivable here to attach the barrier layers 18 to all three foam bodies 26.

In 16 one possibility is shown of how the targeted compression can take place in order to form a sealing strip 3 according to the Figures 6a to 6c produce illustrated embodiment.

The deformation on the upper side 46 of the foam barrier layer web 24 takes place by means of the three compression elements 54 on the two outer foam bodies 26 and on the middle foam body 26. The underside 48 of the foam barrier layer web 24, on the other hand, is supported on a hard base 56.

In this embodiment, the four barrier layers 18 are preferably each adhered to the adjacent foam body 26 but not adhered to one another. It is also conceivable, however, for the barrier layers 18 adjoining one another to be adhered to one another.

In the production of the sealing tape rolls 2, the same boundary conditions and features apply to the foam barrier layer web 24 and the barrier layers 18 as have already been described above for the different sealing tapes 3.

If the foam barrier layer web 24 is wound up directly into a sealing tape roll 2, the foam bodies 26 correspond to Figures 8 to 16 the base bodies 4 of the sealing tape 3. In particular, the barrier layers 18 can also run over only part of the height of the foam body 26. A foam web then remains between the individual sections of the flexible foam on the underside in the region of the barrier layer 18 and there is a continuous foam body 26 whose several sections are connected to one another by means of the flexible foam webs.

Finally, the type and number of barrier layers and their attachment to the different foam bodies 26 or sections of the foam body 26 is variable in accordance with the statements made above for the sealing tape 3.

The respective foam barrier layer web 24 can be provided in a variety of ways at the beginning of the method according to the invention. A whole series of possibilities for this is known from the prior art, all of which can be used. An example is the lamination of at least one barrier layer 18 to at least one foam strip to form a foam barrier web 24. Any manner of providing a foam barrier web 24 having the features recited in the claims may be used, whether or not by in-house manufacture or by purchasing corresponding foam barrier layer webs 24. The method according to the invention is based on further processing a foam barrier layer web 24 provided in any way known from the prior art and thus into a sealing tape roll 2 produced according to the invention to get.

Claims (14)

1. Method for producing a sealing tape roll (2), comprising:

   - providing a foam-barrier layer web (24) which comprises at least one soft foam body (26) able to recover after compression and at least one barrier layer (18), wherein the foam-barrier layer web (24) has a top side (46), a bottom side (48) and two side flanks (50, 52) connecting the top side (46) and the bottom side (48), wherein a transverse direction (Q) of the foam-barrier layer web (24) runs parallel to the bottom side (48) of the foam-barrier layer web (24) from one side flank (50) to the other side flank (52), and wherein a longitudinal direction (L) of the foam-barrier layer web (24) is oriented parallel to the bottom side (48) of the foam-barrier layer web (24) and perpendicular to the transverse direction (Q), and wherein the at least one barrier layer (18) extends, substantially rectilinearly, only from the top side (46) of the foam-barrier layer web (24) in the direction of the bottom side (48) of the foam-barrier layer web (24), but does not extend on the top side (46) of the foam-barrier layer web (24);

   - compressing at least one predetermined portion of the foam-barrier layer web (24) in a targeted manner and, as a result, deforming the at least one barrier layer (18) in such a way that it has, at least in an upper region, a curved or angled form;

   - additionally compressing the entire foam-barrier layer web (24) during the targeted compression or after the targeted compression so as to maintain the curved or angled form of the at least one barrier layer (18) that is obtained during the targeted compression; and

   - forming a sealing tape roll (2) by

   (i) winding up the foam-barrier layer web (24) in the compressed state about an axis of rotation (A) to form the sealing tape roll (2); or

   (ii) winding up the foam-barrier layer web (24) in the compressed state about an axis of rotation (A) to form an intermediate roll (60) and severing the intermediate roll (60) at one or more locations in an axial direction in order to create a plurality of sealing tape rolls (2) which are less wide than the intermediate roll (60); or

   (iii) severing the compressed foam-barrier layer web (24) in the longitudinal direction (L) to form compressed foam-barrier layer strips (70) and winding up the compressed foam-barrier layer strips (70) about an axis of rotation (A, A') to form individual sealing tape rolls (2).
2. Method according to claim 1, characterized in that the at least one barrier layer (18) extends over the entire height of the foam-barrier layer web (24) in the fully expanded state of the foam-barrier layer web (24).
3. Method according to claim 1 or 2, characterized in that a functional direction (F) of the sealing tape (3) wound up to form the sealing tape roll (2) runs from one end face to the other end face of the sealing tape roll, in that, in the compressed state of the sealing tape (3) in the sealing tape roll, the at least one barrier layer (18) runs substantially transversely, preferably radially, with respect to the functional direction (F) in certain portions, and in that, in the compressed state of the sealing tape (3) in the sealing tape roll (2), the at least one barrier layer (18) additionally runs between main bodies (4) of adjacent windings (5) in certain portions.
4. Method according to one of the preceding claims, characterized in that the at least one barrier layer (18) covers a side flank (50) of the foam-barrier layer web (24) and the targeted compression comprises deforming the side flank (50) of the foam-barrier layer web (24) in such a way that an upper end portion (20) of the at least one barrier layer (18), which was previously arranged in the region of the side flank (50), is bent inwards and thus also has an extent in the transverse direction of the foam-barrier layer web (24).
5. Method according to one of the preceding claims, characterized in that at least one barrier layer (18) is arranged in the interior of the foam-barrier layer web (24) between two foam bodies (26) and the targeted compression comprises deforming the foam-barrier layer web (24) in such a way that an upper end portion (20) of the at least one barrier layer (18), which was previously arranged between the top side (46) and the bottom side (48) of the foam-barrier layer web (24), is bent laterally and thus also has an extent in the transverse direction of the foam-barrier layer web (24).
6. Method according to claim 4 or 5, characterized in that a region of a foam body (26), said region being arranged laterally with respect to the at least one barrier layer (18), is compressed in a targeted manner, wherein the region is preferably arranged within 3 mm to 3 cm next to the barrier layer (18).
7. Method according to one of the preceding claims, characterized in that the targeted compression comprises the step of pushing in at least the top side (46) of the foam-barrier layer web (24) in a punctiform manner by means of at least one compressing element (54).
8. Method according to claim 7, characterized in that the at least one compressing element (54) is in the form of a compressing ram or in the form of a compressing wheel.
9. Method according to claim 8, characterized in that the at least one compressing element (54) has a width in the transverse direction (Q) of the foam-barrier layer web (24) of between 0.5 mm and 20 mm, preferably of between 1 mm and 10 mm, particularly preferably of between 1 mm and 7 mm.
10. Method according to claim 4, characterized in that the targeted compression comprises the step of deforming an outer peripheral portion of the foam-barrier layer web (24) by means of a forming shoulder (58).
11. Method according to claim 10, characterized in that the forming shoulder (58) has a forming surface which, in cross section, is C-shaped or is in the form of a partial portion of a C-shape.
12. Method according to one of the preceding claims, characterized in that the foam-barrier layer web (24) is moved in the longitudinal direction (L) during the targeted compression.
13. Method according to one of the preceding claims, characterized by the additional step of applying an adhesive layer (14) in the region of the bottom side (48) of the foam-barrier layer web (24) or of the foam-barrier layer strip (70).
14. Method according to claim 13, characterized in that the adhesive layer (14) is applied in the region of the bottom side (48) of the foam-barrier layer web (24) or of the foam-barrier layer strip (70) after the step of targeted compressing or the step of compressing.

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