EP2990575B1 - Sealing tape for sealing a joint - Google Patents

Description

The present invention relates to a sealing tape for sealing joints.

From sealing tape rolls unwound sealing tapes are commonly used for sealing joints, for example, between a frame profile of a window or a door and a building wall to seal the joints against draft and driving rain. Additionally provided films on a side surface of the sealing tape also increase the vapor impermeability of the same, see, for example EP 0 072 955 A1 or EP 1 936 246 A1 , However, films which are attached to the outside of the sealing tape, have the disadvantage that they can be damaged during transport or installation of the sealing tape.

Out DE 196 41 415 A1 a sealing strip roll is known which has at least one barrier layer extending in the radial direction, which is arranged between two layers of the foam and thus in the interior of the sealing strip roll. As a result, the barrier layer is better protected against damage. The barrier layer consists of adhesive or of a lamination material. To produce such a sealing tape, large-area barrier layers are formed on plates of an open-pore foam material by lamination or gluing. Multiple layers of foam boards and barrier layers form laminate blocks. These laminate blocks are separated into sheets orthogonal to the large-area barrier layers. The panels are then wound into wide rollers such that the barrier layers and the foam material are lined up on the circumference of the rollers in the axial direction. Such a wide roll is then separated between the individual barrier layers into slices to form several sealing tape rolls. This method requires many complex steps and the length of the sealing strips produced is limited by the size limitation of automatically machinable laminate blocks.

Out DE 20 2012 101 990 U1 and DE 20 2012 005 049 U1 In each case, a foam sealing tape is known, which comprises a barrier layer in the interior of the sealing strip, which changes the vapor diffusion permeability in the effective direction of the sealing tape. In an embodiment according to DE 20 2012 101 990 U1 the barrier layer material is inserted in a V-shape in the foam strip of the sealing tape. According to DE 20 2012 005 049 U1 For example, the barrier layer may be double-layered in a similar manner. A connection of Foam strips on both sides of the barrier layer usually takes place via an adhesive layer on the top or bottom side of the sealing strip.

The present invention has for its object to provide a sealing tape with an inner film strip that is easy and reliable to produce with reduced energy requirements and its expansion after compression takes place without any restrictions.

This object is solved by the features of claim 1.

The sealing strip according to the invention for sealing a joint has two longitudinal side flanks, wherein a direction transverse to the side flanks defines a functional direction of the sealing strip. The sealing strip has at least a first foam strip and a second foam strip made of a soft foam which can be reset after compression, which are not formed integrally with each other and are arranged next to one another in the functional direction, each foam strip having an upper side, a lower side and an inner side edge facing the other foam strip , The sealing tape has a first film strip disposed between the first foam strip and the second foam strip so as to reduce a vapor diffusion permeability of the sealing tape in the operative direction, wherein the first film strip is adhesively bonded to the first foam strip. In addition, a second film strip is provided, which is adhesively bonded to the second foam strip, and the first film strip is adhesively bonded to the second film strip. Detachments between the first film strip and the second film strip are located only in an area near the top of the first foam strip and in a region near the bottom of the first foam strip, while in an intermediate region between the adhesion sites the first film strip and the second film strip are not adhered to each other ,

In this way, the foam strips can already be equipped in an upstream production step with the first film strip and the second film strip, and the arrest of the two equipped foam strips takes place only by arresting the two film strips in a later process step. Preferably, in the intermediate region between the adhesion points and thus between the first film strip and the second film strip at least one longitudinal pocket is formed, which is completely enclosed on at least four sides. This has the advantage that a suitable additional material can be introduced into the pocket in order to give the sealing tape further desired properties.

In a particular embodiment, the first film strip is adhered to the top and bottom of the first foam strip and the second film strip is adhered to the top and bottom of the second foam strip.

Alternatively or additionally, the first film strip may be fully adhered to the inner side edge of the first foam strip and the second film strip may be fully adhered to the inner side edge of the second foam strip.

In all embodiments, it is preferred if the adhesion points are formed as longitudinal adhesive lines. As a result, a continuous arrest of the two foam strips is guaranteed to each other, which can also be generated in a simple manner.

In preferred embodiments, the bag is filled with a filler material.

A particularly simple production of the sealing tape according to the invention is ensured if the traps are formed by melting and subsequent curing of a bonding material, in particular an adhesive.

Fig. 1-4

sind Querschnitte durch jeweils eine Ausführungsform eines beispielhaften Dichtbands;

Fig. 5

ist ein Querschnitt durch eine Ausführungsform des erfindungsgemäßen Dichtbands;

Fig. 6-8

sind Querschnitte durch weitere Ausführungsformen beispielhafter Dichtbänder;

Fig. 9

ist ein Querschnitt durch eine weitere Ausführungsform des erfindungsgemäßen Dichtbands;

Fig. 10

ist ein Querschnitt durch eine weitere Ausführungsform des erfindungsgemäßen Dichtbands;

Fig. 11

ist ein Querschnitt durch eine weitere Ausführungsform des erfindungsgemäßen Dichtbands;

Fig. 12

ist ein Querschnitt durch eine weitere Ausführungsform des erfindungsgemäßen Dichtbands;

Fig. 13

ist eine schematische Darstellung einer Einbausituation des erfindungsgemäßen Dichtbands;

Fig. 14-16

zeigen schematisch ein mögliches Herstellverfahren einer Ausführungsform des erfindungsgemäßen Dichtbands;

Fig. 17-21

zeigen alternative Herstellungsschritte einer Ausführungsform des erfindungsgemäßen Dichtbands; und

Fig. 22

zeigt einen ersten alternativen Herstellungsschritt für eine Ausführungsform des erfindungsgemäßen Dichtbands.

Further features and advantages of the present invention will become apparent from the following description with reference to the drawings.

Fig. 1-4

FIG. 15 are cross-sections through one embodiment of an exemplary sealing tape; FIG.

Fig. 5

is a cross section through an embodiment of the sealing tape according to the invention;

Fig. 6-8

are cross sections through further embodiments of exemplary sealing tapes;

Fig. 9

is a cross section through a further embodiment of the sealing tape according to the invention;

Fig. 10

is a cross section through a further embodiment of the sealing tape according to the invention;

Fig. 11

is a cross section through a further embodiment of the sealing tape according to the invention;

Fig. 12

is a cross section through a further embodiment of the sealing tape according to the invention;

Fig. 13

is a schematic representation of an installation situation of the sealing tape according to the invention;

Fig. 14-16

show schematically a possible manufacturing method of an embodiment of the sealing tape according to the invention;

Fig. 17-21

show alternative manufacturing steps of an embodiment of the sealing tape according to the invention; and

Fig. 22

shows a first alternative manufacturing step for an embodiment of the sealing tape according to the invention.

In the Fig. 1 to 12 By way of example, various embodiments of a sealing tape 2 are shown schematically in cross-sectional view in a completely relaxed state. The embodiments of the sealing tape 2 according to the Fig. 1 to 4 and 6 to 8 are not formed according to the invention. The features described in this regard, in particular those provided for in the embodiments according to the invention components whose Properties and their connection, but are analogous to the embodiments of the invention sealing tape 2 transferable.

It should be clarified that the individual elements of the sealing tape 2 shown in the figures are drawn at a distance from each other in order to contribute to the clarity and to be able to designate the individual elements better. In reality, the individual elements of the sealing tape 2 are each close to each other.

The traps 132 are drawn for reasons of clarity as block-shaped elements, but are in reality usually flat, almost point-like, linear or planar structures that produce a close neighborhood between each adjacent to them elements. The traps 132 may also be integrated into or fused to an adjacent element.

In the Fig. 1 to 12 illustrated embodiments of the sealing tape 2 can be prepared as a sealing strip or preferably as a sealing strip roll. In both cases, the sealing strip 2 extends in a direction in the plane of the drawing (longitudinal direction) further than in the transverse direction, which extends from the left side edge 104 of the sealing tape 2 to the right side edge 104. In the case of a sealing strip roll, the sealing strip is compressed in the form of a worm, with adjacent turns of the sealing strip roll lying directly on one another.

In the Fig. 1 illustrated embodiment of the sealing tape 2 has a first foam strip 114 and a second foam strip 116, which are arranged side by side in the direction of operation F. The functional direction F defines the direction in which an air passage and / or a vapor diffusion permeability through the sealing strip 2 is to be reduced. In the present case, the functional direction F runs in the transverse direction of the sealing strip 2 from one side flank 104 of the sealing strip to the other side flank 104.

The width of the sealing tape 2 in the transverse direction between the outer side edges 104 is usually between 5 mm and 20 cm, preferably between 1 cm and 12 cm. The width of a foam strip 114, 116 is preferably between 2.5 and 150 mm, more preferably between 10 and 80 mm. The height of the foam strips 114, 116 is in the relaxed state usually between 5 mm and 150 mm, more preferably between 10 mm and 80 mm.

Within a sealing tape 2, the first foam strip 114 may also have a different width and / or height than the second foam strip 116.

As foams for the foam strips 114, 116, it is possible to use all known open-celled, mixed-celled or closed-cell flexible foams made of e.g. Polyurethane, polyethylene, polyvinyl chloride or polypropylene are used, which make a provision after compression.

To further form the sealing properties of the sealing tape 2, the first foam strip 114 may be made of a different foam material than the second foam strip 116. Likewise, the first foam strip 114 and the second foam strip 116 may be impregnated with different impregnate or only the first foam strip 114 or only the second foam strip 116 may be impregnated. In another embodiment, the first foam strip 114 may have a different color than the second foam strip 116. As a result, for example, a marking of the preferred installation direction of the sealing tape 2 can be made.

In the present example, the first foam strip 114 and the second foam strip 116 are configured substantially identical, in particular have the same height and width. The two foam strips 114, 116 are not integrally formed with each other, i. there is no connecting web of the foam material between the two foam strips 114, 116. Rather, the two foam strips 114, 116 are only directly or indirectly arrested with each other.

The first foam strip 114 has a rectangular cross-section in the illustrated example case. The first foam strip 114 includes an upper surface 118, a lower surface 120, and an inner side flank 122 facing the second foam strip 116. Opposite the inner side flank 122 of the first foam strip 114, the first foam strip 114 has an outer side flank connected to the side flank 104 of the sealing strip 2 coincides. The second foam strip 116 has in the example shown, also a rectangular cross-section. The second foam strip 116 comprises an upper side 124, a lower side 126 and an inner side edge 128 facing the first foam strip 114. The outer side flank of the second foam strip 116 lying opposite the inner side flank 128 at the same time forms the second side flank 104 of the sealing strip 2.

In addition to the illustrated shape of the rectangular cross section, each of the foam strips 114, 116 may also have a different cross-sectional shape, in which the top 118, 124 of one or both foam strips 114, 116 is provided with an arbitrarily shaped profile.

Between the first foam strip 114 and the second foam strip 116, a film strip 130 is arranged such that it reduces or even completely excludes a vapor diffusion permeability of the sealing strip in the functional direction F.

The film strip 130 is preferably made of plastic (polyamide, polyethylene, polypropylene, polyurethane, etc.). But there are also all other materials in question, which are suitable to reduce the passage of air or vapor diffusion through the sealing tape 2. Complete blockage against passage of air or against vapor diffusion is possible but not necessarily necessary. It may be expedient if the foil strip 130 is moisture-variable in such a way that it is more diffusion-tight at high humidity than at low atmospheric humidity or vice versa.

With regard to the materials usable for the film strip 130, for example EP 2 733 271 A1 The content of this application should be included.

In the example of the Fig. 1 the film strip 130 extends vertically over the entire inner side edge 128 of the second foam strip 116. The film strip 130 is in the illustrated example over an adhesive surface 131 over the entire surface with the inner side edge 128 of the second foam strip 116 arrested. The adhesive surface 131 is preferably formed by lamination.

By contrast, the film strip 130 is connected to the first foam strip 114 only via specific adhesion points 132. The traps 132 are shown in the Example of the Fig. 1 only in an upper region 117 of the first foam strip 114 on the inner side edge 122 of the first foam strip 114 near the top 118 of the first foam strip 114 and in a lower region 119 of the first foam strip 114 on the inner side edge 122 of the first foam strip 114 near the bottom 120th In contrast, in a middle region 121 between the upper region 117 and the lower region 119 of the first foam strip 114, the film strip 130 is not adhered to the first foam strip 114.

The upper region 117, the middle region 121 and the lower region 119 of the first foam strip 114 are each identified by the dotted lines. In the relaxed state of the sealing tape 2, the height of the center region 121 is preferably at least 10% of the height of the entire sealing tape, more preferably at least 20%, more preferably at least 30%, more preferably at least 40%, more preferably at least 50%, more preferably at least 60 %. The upper portion 117 and the lower portion 119, however, are preferably less high and preferably substantially of the same height.

The adhesion points 132 are preferably formed as continuous adhesive lines in the longitudinal direction of the sealing strip 2, so that between the adhesion points 132 a pocket 134 is formed, which is completely enclosed on at least four sides by other elements of the sealing strip 2. In the example shown, the film strip 130 and the inner side edge 122 of the first foam strip 114 (supported by the adhesive points 132) form the boundaries of the pocket 134.

It should be noted that the pocket 134 does not have a large extent in the transverse direction. Rather, the pocket 134 will in practice only be perceived as a narrow slot between the two foam strips 114, 116. Typically, the pocket 134 is accessible from the front and back, i. in the two directions out of the drawing plane and into the drawing plane.

The traps 132 are preferably formed by melting and then curing an adhesive. It is particularly preferred if the hotmelt adhesive is integrated as a constituent, for example in layer form, in the film strip 130 and thus during the manufacturing process is activated only by heating and subsequent curing. In this way, the application of an additional adhesive material can be omitted. It is likewise preferred if the film strip 130 itself has thermoplastic adhesive properties and thus the material of the film strip 130 is melted by heating, adhesively bonds with adjacent elements and subsequently hardens.

Special importance in addition to the properties of reducing or preventing vapor diffusion that each film strip 130 is permanently elastic, so that it remains permanently elastic even after storage of the sealing tape 2 in the compressed state in the recovery of the sealing tape 2 and in the installed state of the sealing tape 2 in a joint always tight against the joint flanks.

On the underside of the sealing tape 2, an adhesive layer 80 is also applied, which is covered by a release liner 81. The adhesive layer 80 serves to attach the sealing tape 2 to the component to be sealed, as described later with reference to FIG Fig. 13 will be described in more detail. Such adhesive layer 80 with release liner 81 is preferably also in the embodiments of Fig. 2 to 12 present, but there is no longer shown for reasons of clarity.

In the Fig. 2 illustrated variant of the sealing tape 2 substantially corresponds to the embodiment of Fig. 1 , However, the film strip 130 not only extends over the inner side edge 128 of the second foam strip 116, but is also folded over the top 124 and the bottom 126 of the second foam strip 116 and there also adhered by means of adhesive surfaces 131.

In the Fig. 3 illustrated variant of the sealing tape 2 corresponds substantially to the embodiment of Fig. 2 wherein the film strip 130 is adhered to only the top 124 and the bottom 126 of the second foam strip 116, while it is no longer adhered to the inner side edge 128 of the second foam strip 116.

In the Fig. 4 illustrated variant of the sealing tape 2 substantially corresponds to the embodiment of Fig. 1 , wherein the film strip 130 is no longer completely adhered to the inner side edge 128 of the second foam strip 116, but only about Adhesive locations 132. These traps 132 are disposed on the inner side edge 128 of the second foam strip 116 near the top 124 of the second foam strip 116 and on the inner side edge 128 of the second foam strip 116 near the bottom 126 of the second foam strip 116. Thus, there is a mirror-symmetrical design of the sealing tape 2 with respect to the plane of the film strip 130. In a central region between the adhesion points 132, the film strip 130 is not adhered to the second foam strip 116.

In the embodiment shown here, it is advantageous if the film strip 130 is already provided on both sides with a melt adhesive layer and / or is itself thermoplastic adhesive, so that all the adhesive sites 132 are formed simultaneously when heated and then curing.

In the Fig. 5 illustrated variant of the sealing tape 2 of the invention substantially corresponds to the embodiment of Fig. 4 in that between the film strip 130 and the second foam strip 116, a second film strip 136 is inserted, which in turn is adhered to the second foam strip 116 via adhesion points 132. The material of the second film strip 136 is preferably selected from the same materials that may be used as the material for the film strip 130.

The second film strip 136 is thus adhered to the second strip of foam 116 via adhesion points 132 on one side and to the film strip 130 on the other side. The adhesion between the second film strip 136 and the second foam strip 116 can also be made over the entire surface on the inner side edge 128 of the second foam strip 116. In the in Fig. 5 Thus, in addition to the pocket 134 which is arranged between the film strip 130 and the first foam strip 114, two further pockets are formed: one between the two film strips 130 and 136, and another between the second film strip 136 and the second foam strip 116 ,

In the in Fig. 6 illustrated variant of the sealing tape 2, the design is similar to the embodiment of Fig. 5 , wherein only one film strip 130 is provided, which is arranged in a U-shaped manner between the two foam strips 114, 116 and whose legs are respectively connected with the inner side flank 122 of the first foam strip by means of adhesion points 132 114 and with the inner side edge 128 of the second foam strip 116 are arrested. In addition, as in Fig. 6 shown, the two legs of the film strip 130 still be arrested by means of a further adhesion point 132 in an upper region of the sealing tape 2 with each other.

In the Fig. 7 illustrated variant of the sealing tape 2 substantially corresponds to the embodiment of Fig. 1 wherein the film strip 130 is not adhered to the inner side edge 122 of the first foam strip 114, but is merely adhered to the first foam strip 114 by adhesions 132 disposed on the upper surface 118 and lower surface 120 of the first foam strip 114.

In the Fig. 8 illustrated variant of the sealing tape 2 corresponds to the embodiment of Fig. 1 wherein the bag 134 is filled with a filler 140. Suitable additional material 140 are, in particular, contiguous materials which can be introduced into the pocket 134 in one piece.

Flowable or liquid materials are primarily contemplated when the pocket 134 is additionally closed in a direction out of the plane of the drawing and into the plane of the drawing, i. if the pocket 134 is enclosed by all six sides, or if in a bag 134 enclosed on four sides, the sealing tape 2 is applied in long pieces, so that material leakage at the open sides is insignificant in the overall consideration.

As additional material 140 are in particular in question materials for fire protection (eg expanded graphite, non-combustible solids, CO ₂ emitter, etc.), materials for insulation (eg PU foam, resins, sealants, etc.), materials for waterproofing against moisture (eg hydrophobic or hydrophilic substances, substances which swell on contact with water, etc.), materials for sound insulation, materials for controlled ventilation (eg catalysts, etc.), materials for hygiene (eg disinfectants, etc.) and / or materials for triggering the expansion of the sealing tape (US Pat. eg propellants, heat sources, etc.).

The introduction of an additional material 140 into the pocket 134 is basically possible in all embodiments of the sealing tape 2 according to the invention.

In the Fig. 9 illustrated variant of the sealing tape 2 of the invention substantially corresponds to the embodiment of Fig. 1 , wherein the first film strip 130 is fully adhered to the inner side edge 122 of the first foam strip 114 by means of an adhesive surface 131. In addition, a second film strip 136 is provided, which is adhered to the inner side edge 128 of the second foam strip 116 by means of an adhesive surface 131 over the entire surface. In the embodiment, the first film strip 130 and the second film strip 136 are interconnected via adhesions 132 disposed only in an area near the top 118 of the first foam strip 114 and in a region near the bottom 120 of the first foam strip 114, while in one Intermediate area 138 between the adhesion points 132 of the first film strip 130 and the second film strip 136 are not arrested with each other.

When the detents 132 are again configured as continuous, longitudinal adhesive lines, in the intermediate region 138 between the adhesive points 132 and thus between the first film strip 130 and the second film strip 136, the longitudinal pocket 134 is formed, which in turn is completely enclosed on at least four sides.

The variant of the sealing tape 2 of the invention Fig. 10 is essentially the same as in Fig. 9 described embodiment, wherein the first film strip 130 is additionally folded over to the top 118 and the bottom 120 of the first foam strip 114 and there is arrested by means of adhesive surfaces 131. In addition, the second film strip 136 on the top 124 and the bottom 126 of the second foam strip 116 is folded over and arrested there by means of adhesive surfaces 131.

In the Fig. 11 illustrated variant of the sealing tape 2 of the invention substantially corresponds to the embodiment of Fig. 10 wherein the first film strip 130 is no longer adhered to the inner side edge 122 of the first foam strip 114, and the second film strip 136 is no longer adhered to the inner side edge 128 of the second foam strip 116.

In the Fig. 12 illustrated variant of the sealing tape 2 according to the invention corresponds to the embodiment of Fig. 9 wherein the pocket 134 is now filled with a filler material 140 as previously described with reference to FIG Fig. 8 already described in detail. In principle, in all embodiments, all adhesive surfaces 131 and all adhesion points 132 apply with reference to FIG Fig. 1 explained properties.

In principle, a plurality of foam strips 114, 116 can also be arranged next to one another and connected in the manner according to the invention. In any case, at least one film strip 130 should be arranged between each two foam strips 114, 116. In principle, sealing strips 2 of any shape can be produced, with foam strips 114, 116 and film strips 130 preferably alternating in the direction of operation F, and in each case preferably one foam strip 114, 116 being arranged on one edge of the sealing strip 2.

It is also conceivable that in a case of more than two foam strips 114, 116, the two outer foam strips 114, 116 are only half as wide as inner foam strips 114, 116.

Fig. 13 shows an installation situation of an unwound from a sealing tape roll sealing tape 2 according to the invention The installation situation should apply in principle to all embodiments of the sealing tape 2 of the invention. In this respect, the reference numeral 30 here generally stands for a barrier layer, which is formed in the exemplary embodiments by the film strip 130, but may also be formed by a combination of film strips 130 and additional material 140, and especially in the embodiments according to the invention by a combination of the first Foil strip 130 and second foil strip 136, or by a combination of first foil strip 130, second foil strip 136 and additional material 140. Instead of the additional material 140, only air can be contained in the pocket 134. All these possibilities are summarized below under the term barrier layer 30.

For installation, the sealing tape 2 is usually first unwind from the sealing tape roll and cut into strips of any length. Usually, the length of the sealing strip strip is adapted to the outer contours of a sealed window frame or a door frame. The sealing tape 2 is then preferably fixed to the window frame 112 or door frame by means of the adhesive layer 80 or by means of other adhesive layers, adhesive tapes or other suitable means. When using a double-sided Adhesive tape as adhesive layer 80, therefore, only the release liner 81 must be removed before the sealing tape 2 can be attached directly to the window frame 112.

In the in Fig. 13 Pictured installation situation, the sealing tape 2 between a window frame 112 and a masonry 110 is added to seal the intervening joint. The barrier layer 30 is protectively received between the foam strips 114, 116, whereby damage during storage, transport and assembly of the sealing tape 2 are avoided. The sealing tape 2 is to be installed so that at least one barrier layer 30 extends from the window frame 112 to the masonry 110 and thus substantially orthogonal to the functional direction F of the sealing tape 2. The functional direction F extends parallel to the surfaces of the window frame 112 and the masonry 110 forming the joint to be sealed from a room outside (in FIG Fig. 13 left) to a room inside (in Fig. 13 right). In this way, a reliable seal against draft and vapor diffusion can be ensured.

In Fig. 14 to 16 a first possibility of producing a sealing tape 2 according to the invention is shown. This method is particularly suitable for the embodiments of Fig. 1 and 9 ,

In Fig. 14 are first optional steps of the possible manufacturing process shown. On a roll 10, a soft foam in the form of a wound foam sheet 20 is provided. The soft foam is provided on the roll 10 in long lengths of up to 200 meters, preferably between 5 and 100 meters, more preferably between 10 and 60 meters. The foam web 20 may already be impregnated before further processing, but is preferably not yet impregnated.

By providing on the roll 10, the foam sheet 20 can be transported and processed particularly well. As a rule, the foam web 20 is located on the roll 10 in an un-compressed or only slightly compressed state. It is also possible for the foam web 20 to be in a compressed state on the roll 10, but then, after unrolling from the roll 10, a timely recovery of the foam material in the process flow must be ensured. The width of the foam web 20 is usually between 1 cm and 5 m, preferably between 1.0 m and 1.5 m.

Alternatively, it is also possible to provide individual foam sheets 20 which are not wound on a roll 10, but which requires a larger supply space.

After unwinding from the roll 10, the foam web 20 is moved along a first conveying direction, which is indicated by the arrow V1. Subsequently, a film web 16 is applied to the top 21 of the foam sheet 20 so as to form a laminated foam sheet 34.

In Fig. 14 the film web 16 is provided on a film supply roll 26. Preferably, the film web 16 is applied from the top to the top 21 of the foam sheet 20. This is usually done in the region of a first connection unit, which is represented schematically by the roller 28. Preferably, the film web 16 should be laminated to the foam web 20. The bonding step typically includes generally one step of pressing the film web 16 and the foam web 20 together.

The film web 16 may also itself comprise a layer of adhesive tape or a layer of hot melt adhesive. It is also possible to apply a spray adhesive to the film web 16.

In alternative embodiments, the film web 16 may also be attached from below to the underside 22 of the foam web 20. Another embodiment provides for the application of film webs 16 on the top 21 and the bottom 22 of the foam web 20 before.

By means of at least one blade 38, preferably a plurality of parallel blades 38, at least one continuous cut 40, preferably several parallel continuous cuts 40, in the laminated foam sheet 34 in the longitudinal direction of the laminated foam sheet 34, preferably parallel to the longitudinal edges 23 of the laminated foam sheet 34 is introduced , The longitudinal edges 23 are the edges of the laminated foam sheet 34, which are parallel to the conveying direction V1 and orthogonal to the axial direction of the roller 10. For introducing the at least one continuous cut 40 in the foam sheet 20, in addition to the blades 38 all other the Those skilled in the art known methods for cutting through foam webs 20 are used, such as cutting by sawing, heated wires, laser cutting or water jet cutting.

The continuous cuts 40 create a plurality of second foam strips 116 provided with a film strip 130. The second foam strips 116 produced by the at least one cut 40 may have a different width, but are preferably the same width. The second foam strips 116 may be wound onto a supply roll (not shown) at this point to enable them to be further processed, thus shortening the length of the entire production line, or may be fed directly to further processing. Overall, the number of successive steps in a production line can be varied by the use of supply rolls as a buffer, and thus the length of the individual sections of the production line can be adjusted according to the prevailing space conditions.

It is also conceivable that the foam web 20 is first cut into foam strips 116 and the individual foam strips 116 are then equipped with the film strips 130. In this case, other embodiments of the sealing tape 2 according to the invention can be produced.

In Fig. 15 an example of the optional process of making first foam strips 114 is shown. For this purpose, a foam web 58 made of soft foam on a roller 55 is preferably provided uncompressed. After unwinding from the roller 55, the foam web 58 is moved along a second conveying direction V2. The same applies for the type of foam as for the foam of the foam web 20.

By means of at least one blade 56, preferably a plurality of parallel blades 56, at least one continuous cut 59, preferably several parallel continuous cuts 59, is introduced into the foam web 58 in a direction parallel to the longitudinal edges of the foam web 58. The at least one continuous cut 59 thus generates a plurality of first foam strips 114. Again, in addition to the blades 56, all other methods known to those skilled in the art for cutting through foam webs can be used, for example cutting through sawing, heated wires, Laser cutting or water jet cutting. Likewise, it is also possible here to provide the foam web 58 without winding into a roll 55. The first foam strips 114 may be wound up at this point into a supply roll (not shown) or may be fed directly for further processing. Finally, the first foam strips 114 may also be provided individually. Additionally, the first foam strips 114, as well as the second foam strips 116, may be provided with a film strip 130 on at least one side surface.

Fig. 16 shows essential steps of the possible first manufacturing method, which follows the steps Fig. 14 or 15 can connect. In principle, it is possible for the second foam strips 116 provided with at least one film strip 130 to have already been prefabricated beforehand, for example at another location or by another manufacturer, and to be used only in this finished form during the production process. The same applies to the first foam strips 114.

In the in Fig. 16 In the illustrated embodiment, a second foam strip 116 and a first foam strip 114 of soft foam are combined to form a foam barrier sheeting 70 having a barrier layer 30 disposed between the adjacent foam strips 114, 116. The foam strip 116 is for this purpose preferably rotated by 90 degrees about its longitudinal axis by means of a suitable deflection device, the longitudinal axis extending along a third conveying direction V3. As a result of this rotation, the film strip 24 is subsequently located on a side surface of the foam strip 116 facing the foam strip 114. At the latest from the combination, the second foam strip 116 and the first foam baffle 114 are moved further together in the conveying direction V3. Multiple second foam strips 116 may also be combined with one or more first foam strips 114, or multiple first foam strips 114 with one or more second foam strips 116. The at least one second foam strip 116 may also be provided such that no rotation of the second foam strip 116 is necessary is. It is always important that the side surface of the second foam strip 116 provided with the film strip 130 faces the adjacent first foam strip 114.

The joining of the foam strips 114, 116 requires in addition to the merging of the foam strips 114, 116 further measures. In a connecting unit 36, a step of heat application and optionally. A step, the foam strips 114, 116 to press together. A preferred embodiment of the connection unit 36 will be described below with reference to Fig. 18 described in more detail. The heating device 43 present in each case in the connection unit 36 is specifically designed to firmly connect only upper and lower edge regions of the foam strips 114, 116 by correspondingly adjusting the location of the heat source, the temperature and / or the duration of the heating.

In any case, when joining and connecting the foam strips 114, 116 from the film strip 130, a barrier layer 30 is formed.

The foam barrier sheeting 70 can now be impregnated, for example, for delayed recovery. For this purpose, for example, an impregnation unit 44 with subsequent drying unit 49 is suitable as described below with reference to FIG Fig. 19 described in more detail. The impregnation can also take place at other points of the manufacturing process or even omitted.

After joining and bonding the at least one second foam strip 116 to the at least one first foam strip 114 to a foam barrier sheeting 70 and optional impregnation, a common adhesive layer 80 is applied to all the foam strips 114, 116 of the foam barrier sheeting 70. The application of the common adhesive layer 80 occurs on a surface of the foam barrier sheeting 70 that is perpendicular to the at least one barrier layer 30.

Preferably, the adhesive layer 80 is provided on a supply roll 76 and is applied to the foam barrier sheeting 70 in the region of an application station, here shown schematically by the roller 78, where it is preferably firmly pressed or firmly rolled. Particularly suitable is the use of double-sided adhesive tape as the adhesive layer 80. This has the advantage that it is easy to apply to the foam barrier layer web 70 and thus at the same time an adhesive surface on the side facing the foam barrier layer 70 side is provided by means derer the sealing tape 2 can be connected during assembly with a frame profile 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 laminated with a release liner 81 in order to prevent sticking during further processing. The adhesive layer 80 may also include textile or nonwoven layers.

After applying the common adhesive layer 80 on all foam strips 114, 116 of the foam barrier layer web 70 is compressed to a sealing tape roll 1 wound. For example, one or more pairs of compression rollers 84 may be used for the compression. Alternatively or additionally, a compression roller (not shown) can interact directly with the sealing tape roll when the sealing tape 2 is wound onto the sealing tape roll 1.

In an alternative embodiment, a foam barrier sheeting 70 is wound from a plurality of foam strips 116 and barrier layers 30 and a foam strip 114, after applying a common adhesive layer 80, compressed into a wide roll (not shown) which is then fed by at least one knife or die at least one saw can be cut to form sealing tape rolls 1 desired width, as further below with reference to Fig. 20 will be described in more detail.

The conveying directions V1, V2 and V3 may be identical or different depending on the arrangement of the sections of the production line.

In Fig. 17 to 20 is a second embodiment of a possible manufacturing method for the embodiments of the sealing tape according to Fig. 1 and 9 , but especially for the sealing tape according to Fig. 4 shown.

Before the in Fig. 17 In turn, foam strips 114, 116 are to be provided. The production of these foam strips 114, 116 may be similar to the production of the foam strips 114 in FIG Fig. 15 respectively. The foam strips 114, 116 may have a different width, but preferably they are the same width.

A desired number of individual foam strips 114, 116 is now brought together via suitable traction means and guide elements. In every space between two Foam strips 114, 116, a film strip 130 is also introduced in each case. Each foil strip 130 is preferably provided on a spool 18 or roll and is preferably introduced into the gap via suitable guide elements. Each coil 18 can be arranged in any position to the foam strips 114, 116, wherein each film strip 130 is always introduced substantially in the conveying direction V1 in the corresponding space. It can also deflecting elements, such as deflection shoulders or pulleys, are used. It is also conceivable to provide a film web (preferably in roll form) and to cut them longitudinally into individual film strips 130 before they are introduced into the intermediate spaces between the foam strips 114, 116.

It is also conceivable to arrange each coil 18 such that the film strip 130 can be introduced without deflection in the corresponding space. In addition, it is possible to provide the film strips 130 in any other suitable form, for example, as strips of predetermined length, and bring.

After each foil strip 130 has been introduced into the space between two adjacent foam strips 114, 116, all foil strips 130 are connected to the two adjacent foam strips 114, 116, preferably in the region of a connection unit 36. The joining step generally comprises a heat application step and if necessary, a step to press the foam strips 114, 116 together. To connect the film strip 130 with the foam strips 114, 116, the film strip 130 preferably comprises a solid layer of a hot-melt adhesive on both sides.

Basically, a foam barrier sheeting 70 is provided having at least one barrier layer 30 which is due to the film strip 130.

A detailed view of a possible connection unit 36 is shown in FIG Fig. 18 shown. The connection unit 36 preferably comprises a pair of pressure rollers 41, which are arranged on both narrow sides of the foam barrier layer web 70 and the individual foam strips 114, 116 press against each other. The pressure rollers 41 are preferably each mounted rotatably about a vertical axis, wherein the direction of rotation of the two pressure rollers 41 is in opposite directions. Preferably, in the connection unit 36 as well a pair of draw rolls 42 are disposed which extend across the width of the foam barrier sheet 70 and receive the foam barrier sheet 70 in a nip. The two draw rolls 42 are each driven in opposite directions about a horizontal axis and thus pull the foam barrier sheet 70 through the joint unit 36. Such pairs of draw rolls 42 may also be used at other points in the manufacturing process. In the connection unit 36, the draw rollers 42 may also be arranged upstream of the pressure rollers 41.

In any case, the connection unit 36 comprises a heater 43, which in Fig. 18 is merely indicated. The heater 43 may preferably include a housing surrounding the foam barrier sheeting 70. The heater 43 may be aligned with all possible types of heating. The heater 43 may be used in combination with the pressure rollers 41. It is also possible to provide only the heating device 43 in the connection unit 36. The heater 43 is specifically designed to rigidly connect only upper and lower edge portions of the foam barrier sheeting 70 by adjusting the location of the heat source, the temperature, and / or the duration of the heating, respectively.

Behind the connection unit 36, the foam barrier sheeting 70 can be wound up on a supply roll. However, it is also possible to continuously supply the foam barrier layer web 70 to the further processing steps. Thereby, the number of successive steps in a production line can be varied and thus the length of the individual sections of the production line can be adapted according to the prevailing space conditions.

If the foam strips 114, 116 are already impregnated or the sealing strip is to remain unimpregnated, the intermediate roller 57 can already be made at this point Fig. 20 or even directly the final product, the sealing tape roll 1, are generated.

If this is not the case, are in Fig. 19 the further steps of the second manufacturing process shown. For this purpose, the previously wound on a supply roll 40 foam barrier layer web 70 is first unwound again. At the in Fig. 19 illustrated embodiment, the foam barrier layer web 70 along a second conveying direction V2, which is identical or depending on the arrangement of the sections of the production line may be different from V1, in a next step by an impregnation unit 44 out. Two rollers 45 guide the foam barrier sheeting 70 into a bath of suitable impregnate 48 and the foam sucks fully with the impregnate. Conventional impregnates and methods for impregnating foams are known to the person skilled in the art. Preferably, the foam barrier sheeting 70 is compressed between the rollers 45 to promote the receipt of the impregnate 48 by the subsequent recovery of the foam. After impregnation in the impregnation unit 44, the impregnated foam barrier layer web 70 is dried in a drying unit 49. In this, the impregnated foam barrier web 70 is dried in a known manner, for example by a heating fan or radiant heater. Subsequently, the foam barrier sheeting 70 is rolled up, preferably using compression rolls 51, 52, to an intermediate roll 57. It may be sufficient if only one compression roller 51 is used directly at the transition to the intermediate roller 57, or a pair of compression rollers 52 may previously be used to compress the foam barrier sheet 70. In the example shown, both options are used in combination. On the intermediate roller 57, the foam barrier sheet 70 is in the highly compressed state.

In a particular embodiment, the drying unit 49 downstream of the impregnation unit 44 can also function as a heating device for firmly connecting all the elements of the foam barrier layer web 70 if no heating device 43 has been used previously. In this way, a heating process could be omitted. This also applies to the embodiment of Fig. 16 ,

An adhesive layer 80, for example a double-sided adhesive tape laminated on one side with a release film, is preferably also applied to the foam barrier layer web 70. The adhesive layer 80 is in turn mounted on a supply roll 76 or supply reel and is withdrawn from this. Preferably, the application of the adhesive layer 80 to the foam barrier sheeting 70 occurs simultaneously with the winding of the foam barrier sheeting 70 to the intermediate roll 57, the compression roll 51 creating the pressure to bond the adhesive layer 80 and the foam barrier sheeting 70.

The impregnation of the foam can also be carried out at other positions of the production process. Likewise, the impregnation of the foam can be completely eliminated or done prior to the provision of the foam strips 114, 116. Preferably, however, the impregnation of the foam takes place after the insertion of each film strip 130 into the space between two adjacent foam strips 114, 116, as each film strip 130 adheres better to and therefore bonds better to an unimpregnated foam.

As in Fig. 20 5, the intermediate roller 57 according to the variant of the second manufacturing method is severed at one or more locations in the axial direction to produce a plurality of sealing tape rolls 1 which are less wide than the intermediate roll 57. Preferably, the cutting of the intermediate roll 57 by means of a or more parallel saws 72 performed. In Fig. 20 only one saw 72 is shown, and another parallel section for severing the intermediate roller 57 is indicated by dashed lines. Again, other suitable methods of cutting can be used (eg, knives, heated wires, laser cutting, water jet cutting).

The intermediate roller 57 is cut into sealing tape rolls 1 such that foam strips 114, 116 and the at least one barrier layer 30 alternate in the axial direction of the sealing tape roll 1. In this case, each radially extending barrier layer 30 is received between two foam strips 114, 116 in a sealing tape roll 1, whereby the sealing tape 2 has an increased seal against draft and / or vapor diffusion and each barrier layer 30 is simultaneously protected from external damage. For reasons of clarity, the double-sided adhesive layer 80, which is preferably present and is laminated with a release liner, is not shown here.

In the embodiment of Fig. 20 Sealing tape rolls 1 are produced with exactly one barrier layer 30. Likewise, sealing tape rolls 1 can be produced with a plurality of inner barrier layers 30. In this case, the barrier layers 30 of a sealing tape 2 may have different vapor diffusion tightness. Likewise, for the formation of the barrier layers 30 foil strips 130 can be used whose vapor diffusion tightness adapts variably to the ambient conditions. The step of cutting the intermediate roller 57 into individual sealing tape rolls 1 may also be omitted if the entire intermediate roll 57 is already being used as a sealing tape roll 1. In this case it may additionally be meaningful, in the sense of a smoother outer surface of the sealing tape roll 1 yet separate the edge regions of the intermediate roller 57. Otherwise, the production of the sealing strip roll 1, for example, as done right in Fig. 16 shown.

Fig. 21 shows a further alternative possibility of the final processing of the foam barrier sheet 70 for the production of sealing tape rolls 1. In addition to the Fig. 19 On the right-hand side, the foam barrier layer web 70 can also be cut longitudinally by means of one or more knives 66 or saws in the area of at least one foam strip 114, 116. This inserts at least one cut 68 into the foam barrier sheeting 70 creating at least two foam barrier strips 69. Each foam barrier strip 69 may then be subsequently wound into a finished strip roll 1. In addition, the application of a double-sided adhesive layer 80 provided with a peel-off film preferably takes place as in FIG Fig. 19 (in Fig. 21 not shown). In this way, the in Fig. 20 illustrated step of dividing an intermediate roller 57 omitted. Compression rollers 52 can preferably also be used for precompression of the individual foam barrier strips 69.

Alternatively to the introduction of the film strips 130 between two foam strips 114, 116 can also in Fig. 22 shown variant can be used. Here, after unwinding, a foam web 20 is moved by the exit roller 10 along a conveying direction indicated by the arrow V1. 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, is introduced into the foam web 20 in a longitudinal direction of the foam web 20, preferably parallel to the longitudinal edges 11 of the foam web 20. The longitudinal edges 11 are the edges of the foam web 20, which are parallel to the conveying direction V1 and orthogonal to the axial direction of the output roller 10. In order to introduce the at least one cut 40 into the foam web 20, in addition to blades 38, all other methods known to those skilled in the art for cutting through foam webs 20 can be used.

Each continuous cut 40 creates a gap between two adjacent foam strips 114, 116. In each gap is in a further step respectively a film strip 130 introduced. Each film strip 130 is for this purpose preferably provided on a spool 95 or roll and is preferably introduced via at least one deflecting element 96 into the intermediate space. Each coil 95 can therefore be arranged in any position to the foam web 20, wherein each foil strip 130 is always deflected by the corresponding deflecting element 96 and is introduced substantially in the conveying direction V1 in the corresponding space. As deflecting elements 96, for example, deflecting shoulders or deflection rollers can be used. It is also conceivable to provide a film web (preferably in roll form) and to cut them longitudinally into individual film strips 130 before they are introduced into the intermediate spaces between the foam strips 114, 116.

Since the individual foam strips 114, 116 fit tightly against one another, it is advantageous for the insertion of the film strip 130 if each intermediate space is previously widened by a spreading element 97. As expansion elements 97, for example, in the conveying direction V1 widening, ship bow-shaped noses can be used. In the illustrated embodiment, the deflecting elements 96 are formed integrally with the spreading elements 97, but they can also be present as separate components.

It is also conceivable to arrange each coil 95 such that the film strip 130 can be introduced without deflection in the corresponding space. In addition, it is possible to provide the film strips 130 in any other suitable form, for example, as strips of predetermined length, and bring.

After the introduction of each film strip 130 into the space between two adjacent foam strips 114, 116, the connection of all film strips 130 with the two adjacent foam strips 114, 116 again as before preferably in the region of a connection unit 36. The present in the connection unit 36 in each case heating device 43 is specifically designed to rigidly connect only upper and lower edge regions of the foam strips 114, 116 by adjusting the location of the heat source, the temperature and / or the duration of the heating.

The two in Fig. 14 to 16 respectively. Fig. 17 to 21 respectively. Fig. 22 variants described differ only in the production of the foam barrier layer web 70th Subsequently All further processing steps can be carried out identically. With all the production examples, it is possible to produce wider intermediate rolls 57, which are subsequently subdivided into individual sealing strip rolls 1 (see FIG Fig. 20 ). Likewise, with all production examples directly narrow sealing strip rolls 1 can be produced without a wide intermediate roll 57 being produced (see Fig. 16 ). Also the variant Fig. 21 is possible with all production examples.

In addition to the tensile forces of downstream winding, all foam sheets, foam strips, foam barrier sheets or foam barrier strips are preferably advanced by rolling, more preferably by pairs of counter-rotating rolls. Also treadmills can be used. Such means of transportation can also be used for the film strips and film webs.

The heating devices mentioned in the exemplary embodiments are usually designed as hot air blowers. But it is also radiant heating in question, for example by means of an infrared heater or microwave heating.

Claims (7)

1. Sealing tape (2) for sealing a joint,
   having two longitudinally running side flanks (104), wherein a direction transverse to the side flanks (104) defines a functional direction (F) of the sealing tape (2),
   wherein the sealing tape (2) has at least one first foam strip (114) and one second foam strip (116) made of a flexible foam which is capable of recovery following compression, said strips not being formed in one piece with one another and being arranged one beside the other in a functional direction (F) of the sealing tape (2), wherein each foam strip (114, 116) has an upper side (118, 124), an underside (120, 126) and an inner side flank (122, 128), which is directed towards the other foam strip (114, 116), and wherein the sealing tape (2) has a first film strip (130), which is arranged between the first foam strip (114) and the second foam strip (116) such that it reduces vapour-diffusion permeability of the sealing tape (2) in the functional direction (F), wherein the first film strip (130) is adhesively bonded to the first foam strip (114),
   characterized in that
   a second film strip (136) is provided, said second film strip being adhesively bonded to the second foam strip (116),
   the first film strip (130) is adhesively bonded to the second film strip (136), and
   adhesion sites (132) between the first film strip (130) and the second film strip (136) are arranged merely in a region in the vicinity of the upper side (118) of the first foam strip (114) and in a region in the vicinity of the underside (120) of the first foam strip (114), whereas the first film strip (130) and the second film strip (136) are not adhesively bonded to one another in an intermediate region (138) between the adhesion sites (132).
2. Sealing tape (2) according to Claim 1, characterized in that a longitudinally running pocket (134), which is closed all the way round on at least four sides, is formed in the intermediate region (138) between the adhesion sites (132) and thus between the first film strip (130) and the second film strip (136).
3. Sealing tape (2) according to Claim 1 or 2, characterized in that the first film strip (130) is adhesively bonded to the upper side (118) and the underside (120) of the first foam strip (114) and the second film strip (136) is adhesively bonded to the upper side (124) and the underside (126) of the second foam strip (116).
4. Sealing tape (2) according to one of Claims 1 to 3, characterized in that the first film strip (130) is adhesively bonded over its entire surface area to the inner side flank (122) of the first foam strip (114) and the second film strip (136) is adhesively bonded over its entire surface area to the inner side flank (128) of the second foam strip (116).
5. Sealing tape (2) according to one of the preceding claims, characterized in that the adhesion sites (132) are designed in the form of longitudinally running adhesion lines.
6. Sealing tape (2) according to Claim 2, characterized in that the pocket (134) is filled with an additional material (140).
7. Sealing tape (2) according to one of the preceding claims, characterized in that the adhesion sites (132) are formed by melting and subsequent curing of a bonding material, in particular of an adhesive.

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