EP2309090A1 - Foam sealing strip - Google Patents

Abstract

The strip (1) has broad sides (2, 5) associated to a window frame and/or a brickwork. Narrow side surfaces (6, 7) extend transversely to the broad sides. The narrow side surfaces include an airtight layer, which is connected with the strip. The airtight layer partially covers one of the narrow side surfaces in an installed state. Multiple foam-sub strips (8, 9) are separated from each other by an intermediate layer (11) e.g. self-adhesive layer, which forms the airtight layer. The intermediate layer extends toward one of the broad sides at an acute angle (alpha) in a cross section.

Description

The invention relates to a delayed-return impregnated foam sealing tape, for example, to the arrangement between a window frame and this associated masonry, with the window frame or masonry associated broadsides, further extending transversely to the broad sides narrow side surfaces are formed and a narrow side surface associated with her, Having tightly connected with the foam sealing tape air-impermeable layer.

Such foam sealing tapes have already become known in many respects. It is for example on the DE 35 44 277 C1 , the DE 39 21 777 C2 , the DE 196 41415 C2 and the DE 4123 647A1 directed.

Foam sealing tapes serve to regulate moisture on the one hand. For this purpose, it is also preferable, for example, to form a higher vapor diffusion resistance on one side across the width of a sealing strip, see, for example DE 10 2008 049 210 A1 and the DE 10 2006 043 050 A1 , On the other hand, an air change should be guaranteed. Sometimes, however, there is too much air exchange.

On this basis, the invention has the object of specifying a delayed-return impregnated foam sealing tape, which, without resulting in disadvantages in terms of resilience, can continue to achieve a relatively low air exchange with continued favorable filling of the joint.

A possible solution to this problem is given in the subject matter of claim 1, which is based on the fact that the air-impermeable layer is formed as between the narrow side surfaces extending intermediate layer and in a projection parallel to a broadside the narrow side surface anyway in the installed state only partially covers, wherein the intermediate layer extends in projection on the narrow side surface only over part of the height of the narrow side surface, or that, in the case of an outer overlap of the air-impermeable layer, a porosity of the air-impermeable layer is formed, in both cases, the air permeability is reduced by 10 to 70%. According to the invention, an air-impermeable, but porous, layer which extends across an intermediate layer or through a narrow side surface of the foam-sealing strip achieves a targeted adjustment of the air permeability of the foam-sealing strip in the sense of a lower, namely at least 10%, lower air permeability.

The reduced air permeability is compared to a same sealing tape, ie in particular with regard to the foam used and the cross-sectional dimension same sealing tape to understand. The reduced air permeability may be especially 20 to 40%, for example 30%. The aforementioned ranges of 10 to 70% and 20 to 40%, respectively, include in the disclosure also all intermediate values as disclosed, especially in 1% steps. Also with regard to the range limits, a single or multiple narrowing from above and / or from below is included.

It is particularly preferred that the foam sealing tape is composed in a cross section of two or more foam partial strips and the partial strips are separated from each other by the intermediate layer. The intermediate layer itself may also be partially air-permeable or porous or formed with openings in total or in a partial surface.

It is further preferred that the intermediate layer extends in a cross section at an acute angle to a broad side and, projecting on a side surface, extends only over a partial height of the side surface, wherein also the Interlayer has a lower air permeability than the foam of a foam sub-strip.

By running at an acute angle to a broadside arrangement of the intermediate layer, the air permeability in the relevant projection surface is reduced. The air permeability of the foam sealing tape is thus reduced overall. As a result of the compression and expansion, even in normal conditions, the same height conditions exist in each expansion position. The intermediate layer can in particular be chosen to be comparatively thin. It can be a common plastic film layer. But it can also be a foam layer, for example, a small open-cell foam or a closed-cell foam, act.

In particular, it is preferred that the intermediate layer is airtight. This makes it possible to achieve the greatest effect in terms of reducing the air permeability in relation to the projection area covered thereby.

A further preferred embodiment provides that the separating layer is designed as a self-adhesive layer. More preferably, it is a double-sided self-adhesive layer. A self-adhesive layer usually consists of a pressure-sensitive adhesive layer applied to a carrier. This allows a permanent bond under light pressure. For example, natural rubber pressure-sensitive adhesives in which tackifying tackifiers and plasticizers having relatively low molecular weights are blended are used. In addition, it may also be, for example, an acrylate pressure-sensitive adhesive. The carrier may be a nonwoven material, a fabric tape, a paper strip, a plastic film or the like. Often, a grid, for example made of glass fibers, is inserted into the adhesive. These are preferably the same self-adhesive layers, of which also on such a sealing tape on the outside, on a broad side, one is provided.

It is also preferable that the two or more partial foam strips consist of a same foam. It may, for example, be an open-cell flexible polyurethane foam.

The foam partial strips can be provided in cross-section with an equal surface area, possibly also with a different area ratio. Furthermore, it is also preferred that the intermediate layer extends at least over a partial region of the cross-sectional width, in any case with respect to its region which optionally extends in cross-section at an acute angle to a broad side. Following the region extending at an acute angle, the intermediate layer on one or both sides can also extend in cross-section parallel or at a further angle to a broad side. Said acute angle can extend up to a right angle, in which case then the intermediate layer extends at right angles to a broad side.

The foam-sealing strip can also be formed by folding from a single, about a longitudinal section for preparing the folding having foam strips. Then preferably so that arise in the folded state broadsides with the same height level over the width. Before folding over, a different height level can be given, for example. In this case, an edge-surface formed by the folding-over-but inside the foam-sealing strip, located between the two narrow side surfaces, which extends in the folded state only over a part of the height of the foam-sealing strip. This edge surface can be provided with the intermediate layer. The intermediate layer can also encompass the edge surface. Preferably, the wrapping is then associated with the other region of the foam sealing strip on which the folded area rests, assigned. If the intermediate layer is in the form of an adhesive layer, for example a double-sided self-adhesive layer, it is also possible for the attachment to be achieved in the folded-over state by the wrapping.

Fig. 1

einen Querschnitt durch ein erstes Schaumstoff-Dichtband mit Z-förmig angeordneter Zwischenlage;

Fig. 2

einen Querschnitt durch eine weitere Ausführungsform ei- nes Dichtbandes mit sich senkrecht zu einer Breitseite erstreckender Zwischenlage;

Fig. 3

einen Querschnitt einer nochmals weiteren Ausführungs- form, wobei die Teilstreifen nut- und federartig ineinander greifen;

Fig. 4

einen Querschnitt durch eine nochmals weitere Ausfüh- rungsform mit gerader Schrägteilung; und

Fig. 5

eine nochmals weitere Ausführungsform mit einer Folien- umhüllung.

In the following, the invention will be explained further with reference to the attached drawing, which, however, represents only exemplary embodiments. Hereby shows:

Fig. 1

a cross section through a first foam sealing tape with Z-shaped arranged intermediate layer;

Fig. 2

a cross section through a further embodiment of a sealing strip with perpendicular to a broad side extending intermediate layer;

Fig. 3

a cross section of yet another embodiment, wherein the partial strips groove and tongue-like mesh;

Fig. 4

a cross section through yet another embodiment with straight bevel division; and

Fig. 5

a still further embodiment with a foil sheath.

Presented and described is first, with reference to Fig. 1 , a foam sealing tape 1, which is shown in cross section. The foam sealing tape 1 is made of open-cell foam with respect to the foam, which is impregnated for delayed recovery. The impregnate may be, for example consist of a polyacrylate. The foam may be, for example, an open-celled polyurethane foam.

With regard to the use and installation of such a sealing tape 1 reference is made to the documents mentioned above. For example, the sealing tape 1 can be adhesively bonded to its first broad side 2 by means of a provided by a cover layer 3 self-adhesive tape 4 with a window profile. The opposite broad side 5 is then according to the provision of an example opposite masonry to the plant. The narrow sides 6, 7 of the foam sealing tape 1 extend transversely to the broad sides 4, 5. The designation chosen here is not limited to the fact that the narrow sides 6, 7 are actually smaller surfaces than the broad sides 2, 5. If so, too is preferred, but the ratio is not determined by this.

It is particularly preferred that a width B, d. H. an extension in the depth direction of a joint corresponding to the frame width of a window frame to be sealed, for example. In particular, this width B corresponds to a dimension of 40 to 250 mm, preferably 40 to 150 mm. With regard to the specified numerical bandwidths, all intermediate values, in particular in increments of 1 mm, are also included as disclosed. Furthermore, with regard to the range limits, there is also a one or multiple narrowing of the range limits in 1 mm increments from above and / or from below.

The foam sealing strip 1 further consists in cross section of two foam strips part 8, 9. In the embodiment take the foam strips part 8, 9 geometrically equal areas. With regard to the area size, the foam sealing tape 1 is divided in half.

The foam partial strips 8, 9 are in a Z-shaped parting line 10 to each other. In this parting line 10, at least partially extending in the vertical direction, an intermediate layer 11 is arranged. In the embodiment, the intermediate layer 11 consists of a double-sided adhesive tape. The intermediate layer 11 is preferably practical, at least with regard to the differential pressures acting in the installed state, airtight. But it may also already be sufficient that it is something or significantly more airtight than the foam of the sealing tape 1. Also this double-sided tape is evidently Z-shaped in the illustrated cross-section. Here, the Z connecting the two in the embodiment horizontally extending Z-beams 12,13 center section 14, in an imaginary extension, with the broad side 2 (or broadside 5) an acute angle alpha. It can also only a Z-bar above, d. H. on the side of the self-adhesive tape 11, in each case also based on the representation, be provided. It may also be formed only the Z-center section.

A projection of the Z center section 14 onto a side surface, in the exemplary embodiment this is illustrated by the side surface 7, covers a partial region a of the total height b of the foam sealing strip 1.

In the embodiment according to Fig. 1 is the area a center with respect to the upper and lower areas c, which are not covered by the intermediate layer 11 in projection.

In the embodiment of Fig. 2 the intermediate layer 11 is arranged such that the corresponding height section a, starting from the one broad side, here wide side 5, extends to a central region of the sealing strip 1. Then, in the height direction, a region c is then provided, which extends from the end of the region a to the second broad side 2. The liner 11 may be in Fig. 2 also extend only vertically.

Specifically, it is the foam of the Fig. 2 around a formed by folding over a single foam strips foam sealing strip.

With the exception of the gusset 21, which in this case also an immediate investment can be realized between the associated surfaces of the Umklappabschnittes 22 and the height portion 23 of the unfolded region of the foam strip, a continuous same height is given over the broadsides. The given by the folding dividing line 24 also extends only over part of the width B of the foam sealing strip. The folding results in a then arranged in the interior of the foam-sealing strip edge surface 25, which extends over only a portion of the height, here the height a, of the foam sealing strip. This edge surface is provided with the intermediate layer 11. If, as in the exemplary embodiment, it is a double-sided self-adhesive layer, it can be adhered to the edge surface 25 by adhesive bonding on the one hand, and on the other hand by the wrapper 26, which is also formed at the same time, to result in attachment to the unfolded part of the foam strip. As can be seen in cross-section a hook-like course of the intermediate layer 11 is given, hereby a right-angled in the embodiment bending, which results in said Umgriff.

In the embodiment of the Fig. 3 are the two foam partial strips 8, 9 formed geometrically different. While the foam partial strip 9, based on the cross-sectional view, has a central height formation 15, the foam partial strip 8 has two lateral height formations 16, 17 matching the height formation 15, which merge into one another through a valley region 18. The height range 15 fits into the opening formed by the height areas 16, 17 and the valley area 18.

Here, too, is preferred, as shown and also with respect to the embodiment of Fig. 1 and 4 given that the partial strips complement each other to a closed rectangle.

In the embodiment of the Fig. 3 is only at one of the two valley slopes, here the valley slope of the height range 17, the intermediate layer 14 is provided. It is also provided here only in a straight line extending in cross section. But you could also, as in the embodiment 1, Z-shaped extending provided.

In the embodiment of Fig. 4 the foam sealing tape is composed of two geometrically identical foam part strips 8, 9. However, the dividing line between the foam partial strips 8, 9 is now provided in the cross-sectional view, as seen in a straight line. Accordingly, the intermediate layer 14 extends in a straight line.

In the embodiment of Fig. 5 another basic principle is realized. Here in the cross section is intact, ie in the usual way formed at right angles foam sealing tape 1 is provided, which is enveloped on one or both sides of a film 19 in the outer overlap. In order on the one hand to achieve an air permeability on the one hand, but on the other hand to allow them only to a limited extent, through holes 20 are formed on the narrow side 7 facing region of the film 19 to achieve a porosity. These are provided in such a size and / or distribution or the height and / or length of the sealing strip that the desired air exchange rate is established. In view of the given in the provision of the enlargement of the narrow side 7 of the foam-sealing strip here, in the embodiment assigned to a broadside, formed by folding a length stock 27 with respect to the film. Obviously, the illustration refers to the unexpanded state.

Regarding the embodiments of the Fig. 1 to 4 on the other hand, the expanded state is shown in each case.

The height ranges and low ranges are preferably aligned to a longitudinal direction of the foam sealing strip 1 extending. In the embodiment of the Fig. 2 is based on the right side of the local cross-sectional representation of the low range adapted by tierhaltigem increase to the height range. Here is the special feature that the foam in a peripheral region is still contiguous. He can also be completely separated and only by the liner 11, the two foam parts can be held together.

The embodiment of the Fig. 3 is also characterized by the fact that two foam parts 8, 9 are assembled in opposite directions, which is formed once, in the embodiment, the upper part 8, two height portions 16, 17 and in the width direction between the height ranges, a low region 18, wherein the height ranges 16, 17 and the low region 18 are aligned with a longitudinal direction of the foam sealing strip 1. While in the embodiment of the lower foam strip 9 has only one, middle height range 15, which fits snugly into the low region 18 of the upper foam sub-strip 8.

As already mentioned, there may also be a combination between the exemplary embodiments. Thus, in particular, the sealing strip 1 according to the Fig. 1 to 4 also on a narrow side 6, 7 still with a perforated, film according to the embodiment of the Fig. 5 be educated. In the embodiment of the Fig. 5 is also a fold below to recognize, but a folding may be sufficient, which provides the length of supply in the course of the provision. Further, the U-legs of the here are generally U-shaped, in cross-section, arranged film glued to the foam-sealing strip 1 respectively. In addition, a self-adhesive tape 4 with a cover 3 is also on one side, the embodiment on the upper side, formed. The self-adhesive tape is also provided here as a double-sided adhesive tape.

All disclosed features are essential to the invention. The disclosure of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application. The subclaims characterize in their optional sibling version independent inventive development of the prior art, in particular to make on the basis of these claims divisional applications.

Claims (9)

For delayed recovery impregnated foam sealing tape (1), for example, to the arrangement between a window frame and this associated masonry, with the window frame or the masonry associated broadsides (2, 5), wherein further transversely to the broad sides (2, 5) extending narrow side surfaces (6, 7) are formed and a narrow side surface has an associated, with the foam sealing tape firmly connected airtight layer (11), characterized in that the air-impermeable layer (11) is formed as between the narrow side surfaces extending intermediate layer and the narrow side surface (6) at least partially covers in the installed state, wherein the intermediate layer (11) extends in projection on the narrow side surface (6, 7) only over a part (a) of the height of the narrow side surface (6, 7), or that, in the case an outer overlap of the air-impermeable layer (11), a porosity of the air-impermeable layer (11) is formed, in both cases, the air permeability is reduced by 10 to 70%. Foam sealing tape according to claim 1 or in particular according thereto, characterized in that the intermediate layer (11) is formed porous. Foam sealing strip according to one or more of the preceding claims or in particular according thereto, characterized in that the foam sealing strip (1) is composed in a cross section of two or more foam partial strips (8, 9) and the partial strips (8, 9) are separated from each other by the intermediate layer. Foam sealing tape according to one or more of the preceding claims or in particular according thereto, characterized in that the Intermediate layer in cross section at an acute angle to a broadside. Foam sealing tape according to one or more of the preceding claims or in particular according thereto, characterized in that the intermediate layer (11) is formed airtight. Foam sealing tape according to one or more of the preceding claims or in particular according thereto, characterized in that the intermediate layer (11) is designed as a self-adhesive layer. Foam sealing tape according to one or more of the preceding claims or in particular according thereto, characterized in that the intermediate layer (11) is designed as a double-sided self-adhesive layer. Foam sealing tape according to one or more of the preceding claims or in particular according thereto, characterized in that the two or more partial strips (8, 9) consist of a same foam. Foam sealing tape according to one or more of the preceding claims or in particular according thereto, characterized in that the part (a) of the height of the side surface (6, 7) which is projected from the intermediate layer (11), 5 to 95% of the total height the side surface corresponds.

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