EP2354410B1 - Foam sealing strip and window reveal with foam sealing strip - Google Patents

Description

The invention initially relates to a foam sealing strip suitable for sealing a window frame according to the preamble of claim 1.

In addition, the invention relates to a window reveal according to claim 10.

Such a foam sealing strip is, for example, from EP 1 811 111 A2 known. The two foam sealing strips are provided in superimposed layers. In addition, to a state of the art according to DE 10 2008 049 210 A1 to refer. From this, foam strips extending next to one another, which together form a foam sealing strip, are known which have a different initial density and/or a different impregnation to achieve a different vapor diffusion resistance. Last but not least is on the DE 10 2009 013 107 A1 to refer, from which it is known, among other things, about the cross section of a

Foam sealing strips to achieve a different vapor diffusion effect as a result of foam strips connected one above the other by means of gluing. More foam sealing strips are from the DE 10 2008 063 371 A1 , the EP 2 112 292 A2 and the DE 20 2008 010 857 U1 known.

Proceeding from this, the invention is concerned with the task of specifying a foam sealing strip that enables a further advantageous possibility of achieving a different vapor barrier effect on the opposite narrow sides.

A possible solution to the problem is given by the subject matter of claim 1 according to a first idea of the invention, whereby in this case it is based on the fact that the differently high vapor barrier effect is achieved by a different height of the foam strips in the uncompressed state. Such a foam sealing strip is correspondingly distinguished by foam strips extending next to one another, which extend to different heights starting from the same initial plane, which is horizontal in cross section, for example. They are therefore designed with a different initial thickness. You can consist of the same foam material, but also of different foam material. In order to achieve the different vapor barrier effects, it is only necessary to combine in the manner described different foam strips that have been produced separately in the initial state. When installed, the height of the foam strips is practically the same, so that the different levels of compression required when installed result in the desired different levels of vapor barrier effect (µ values) across the width. A common stock for such sealing tape is in roll form. In the rolled-up state, there is correspondingly different compression across the width. The compression when installed is usually less than when stored on a roll.

In principle, the vapor barrier effect could also be additionally influenced by different foam materials in the foam strip. However, it is preferred within the scope of the application as a whole that the foam strips each consist of the same foam.

The combination of the foam strips to form a foam sealing strip is preferably achieved in that the two foam strips are seated on the same strip, preferably a self-adhesive strip, which preferably extends over the entire width of the foam sealing strip, and are attached thereto, preferably by the aforesaid self-adhesive. In particular, it can be a double-sided self-adhesive strip that is suitable for gluing to the window profile, for example, on the other side, that is, facing away from the foam strip. For this purpose, the self-adhesive strip usually and preferably also has a cover layer until it is installed, which can then be pulled off to expose the adhesive layer before installation.

Provision is further preferably made for such a foam sealing strip to extend over the entire width of a relevant window profile, at least the width of the window profile (or optionally also a door profile, etc.) that is usually covered for sealing purposes. Typical widths in this context are, for example, 55, 65 or 75 mm. Accordingly, only one foam sealing strip is required for sealing on the inside and outside. The same, preferably integral, foam sealing strip provides both the seal to the inside of the room and to the outside of the room.

The subject matter of the invention is also a window reveal according to claim 10.

Further features of the invention are described below, also in the description of the figures and in the drawing, often in their preferred assignment to the claim concepts already discussed above, but they can also be assigned to only one or more individual features that are described here or shown in the drawing are, in particular those of the claims already dealt with, or be of importance independently or in another overall concept. The description concentrates on the structure of the foam weatherstrip as such, with regard to the objects described here both the foam weatherstrip as an individual object and in its combination with a window frame or the like are concerned.

So it is preferred that the foam strips have the same width. The foam strip on the inside of the room, the determination of which for arrangement on the inside of the room can be predetermined, for example by a color marking or the like, has a greater thickness than the foam strip assigned to the outside of the room. This greater thickness does not necessarily have to be present in every area of the width of the relevant foam strip compared to the other foam strip. It can be sufficient if this greater thickness (in the uncompressed state) compared to the other foam strip is given in an averaging over the width of the individual foam strip.

A further embodiment also provides that the foam strips are provided with different widths. Here, in particular, the foam strip that produces the higher vapor barrier effect can be provided with a smaller width than the foam strip that produces the lower vapor barrier effect.

Specifically, a foam strip can have a profile that is rectangular in cross section. However, the profile can also be designed to run obliquely or rounded, in particular with regard to the free edge of a foam strip extending in the width direction. The transition in cross section from one foam strip to the other can be linear or curved throughout, but also in the form of a step or a gusset. This is regardless of the fact that there can be a gap between the strips anyway, as discussed below. With regard to the gusset, for example, a V-shaped indentation can be provided in the cross-sectional contour. With regard to the step, the diffusion-open strip can be set deeper in this transition area, but it can also be set higher than the diffusion-tight strip.

In addition, the foam strips can also have a trapezoidal profile in cross section. For example, also in such a way that they are arranged partially overlapping in a direction perpendicular to the width direction of the foam sealing strip.

Although it is preferred that the foam strips are in direct contact with one another, they can also leave a gap between them. The gap, which extends correspondingly transversely to a plane extension of the adhesive layer provided for attachment, for example, to a frame part, is then preferably open on one side, but closed on the other side by the covering adhesive layer. In the transverse direction, the gap can have a dimension of a few tenths of a millimeter up to a few millimeters. In individual cases, depending on the total width of the foam sealing strip, up to one or more centimeters.

It can also be provided that the foam strips are glued to each other on their mutually facing sides, which do not necessarily have to be narrow sides in view of the individual geometry of such a foam strip, in the area in which they overlap.

In further detail, the impregnation agent is preferably an acrylate-based impregnation agent. In addition, it is preferably set in such a way that an impregnated foam strip pressed onto a glass plate, for example, can be removed without leaving any residue. This is not possible with an adhesive such as that used for self-adhesive strips.

The bulk densities of the foams used can be between 20 and 50, preferably between 25 and 40 kg/m ³ . In the impregnated state, which then also corresponds to the initial density discussed here a density between 40 and 120, preferably between 50 and 100 kg/m ^{3 can be} selected. The disclosure also includes the intermediate values, in particular in 1/10 kg/m ³ steps, to limit a limit from below and/or above, but also in the sense of singular values.

The different vapor barrier effects can be expressed by the vapor diffusion resistance number µ. This is a measure of the resistance of the - soaked - foam strip to the water vapor (humidity) compared to one meter air layer thickness. Reference should be made to DIN 18542. The foam strip facing the interior of the room can have a μ value of 5 to 20, preferably 8 to 15, more preferably 10, for example. In contrast, the foam strip facing the outside of the room can have a μ value of 2 to 15, preferably 4 to 10, more preferably 4.5 or 5. In these values, too, all intermediate values are included in the disclosure, also in the tenth increment range, both to restrict the stated limits from above and/or below and to show individual values located within the limits.

Fig. 1

eine schematische Querschnittsansicht eines SchaumstoffDichtstreifens erster Ausführungsform, mit schräg verlau-fender oberer Randkante des diffusionsdichteren Streifens;

Fig. 2

ein Schaumstoff-Dichtstreifen zweiter Ausführungsform mit gradem Verlauf der oberen Randkante des diffusions-dichteren Schaumstoffstreifens;

Fig. 3

eine weitere Querschnittsdarstellung einer Ausführungsform bei welcher bei beiden Schaumstoffstreifen die obere Konturlinie schräg verlaufend ausgebildet ist;

Fig. 4

eine weitere Ausführungsform bei welcher innerhalb der Kontur des diffusionsoffenen Schaumstoffstreifens eine stufenartige Absenkung ausgebildet ist;

Fig. 5

eine Ausführungsform bei welcher die Schaumstoffstreifen im Querschnitt teilweise in Überdeckung zueinander sind;

Fig. 6

eine Ausführungsform bei welcher der Schaumstoffstreifen höhere Dampfdichtigkeit oberseitig eine gerundete Kontur aufweist;

Fig. 7

eine Ausführungsform bei welcher die Konturlinie des dampfdiffusionsdichteren Schaumstoffstreifen in sich gestuft verläuft;

Fig. 8

eine Ausführungsform bei welcher bei beiden Schaumstoffstreifen die obere Konturlinie gekrümmt verläuft;

Fig. 9

eine Ausführungsform bei welcher die obere Konturlinie des dampfdiffusionsoffenen Schaumstoffstreifens gekrümmt verläuft während die obere Konturlinie des dichteren Schaumstoffstreifens gerade verlaufend vorgesehen ist.

The invention is further explained below with reference to the attached drawing, which, however, merely represents exemplary embodiments. This shows:

1

a schematic cross-sectional view of a first embodiment of a foam sealing strip, with a sloping upper edge of the diffusion-tight strip;

2

a foam sealing strip of the second embodiment with a straight course of the upper edge of the diffusion-tight foam strip;

3

a further cross-sectional view of an embodiment in which the upper contour line is designed to run obliquely in both foam strips;

4

a further embodiment in which a step-like lowering is formed within the contour of the diffusion-open foam strip;

figure 5

an embodiment in which the foam strips are partially overlapping each other in cross-section;

6

an embodiment in which the foam strip has a higher vapor tightness on the upper side with a rounded contour;

Figure 7

an embodiment in which the contour line of the vapor diffusion-tight foam strip is stepped;

8

an embodiment in which the upper contour line is curved in both foam strips;

9

an embodiment in which the upper contour line of the vapor diffusion-open foam strip is curved while the upper contour line of the denser foam strip is provided to run straight.

Shown and described are foam sealing strips 1, which consist of two foam strips 2, 3 arranged side by side in the longitudinal direction.

The underside are the foam strips 2, 3 through a over the entire Width of the foam sealing strip extending adhesive tape 4 connected to each other. A covering layer 5 is applied to the outside of the adhesive tape 4 .

In the embodiment of 1 the foam strip 3 facing the interior of the room is rectangular in cross section, but is beveled in cross section with respect to its upper free edge 6, which in the installed state comes to rest on a window reveal or the like. Namely with a sloping towards the foam strip 2 slope. In the exemplary embodiment, the foam strip 2 is also completely rectangular in cross section. Its upper edge 7, which faces the window reveal or the like when installed, runs horizontally.

The exemplary embodiments shown all represent the fully recovered state of the foam sealing strip or the individual foam strips.

The embodiment of 2 corresponds to the embodiment of 1 , but with the difference that the edge 6 of the foam strip 3 is also designed to run horizontally.

With regard to all embodiments, the result is that the foam strip 3 has a greater height H, at least locally, than corresponds to the height h of the foam strip 2, at least in the immediate side surface area.

In the embodiment of 3 are both foam strips, 2 and 3, formed in cross section so that the upper free edge 6 or 7 is provided with a slope to the horizontal running. The transition between the foam strips 2 and 3 is step-like, with a step edge 11 a Initial height H 'of the foam strip 3 exceeds. The excess u is also given over a substantial part of the width b of the foam strip 2 . However, it decreases continuously due to the sloping formation of the upper free edge 7 of the foam strip 2. The maximum extent of the overlap U is about 1/10 to 1/3 of the difference between the heights H and h, with all intermediate values, especially in 1/20 increments Difference measure, are hereby incorporated into the disclosure.

In the embodiment of 4 the upper edges 7 or 7' and 6 are each provided to run horizontally. However, with respect to the foam strip 2, a stepped formation is provided in the otherwise integral foam strip 2. Thus, the marginal edge 7 runs at a higher level than the marginal edge 7'. However, the marginal edge 6 runs both at a higher level than the marginal edge 7 and at a higher level than the marginal edge 7'. Despite the stepped or at least different height design of the upper edge 7, 7' of the foam strip 2, the upper edge 6 of the foam strip 3 is consistently at a higher level than the upper free edge of the foam strip 2.

In the embodiment of figure 5 the two foam strips 2, 3 are designed to overlap one another in a transition region X. Specifically, a tip of the foam strip 2 facing the foam strip 3 protrudes over the base of the foam strip 3 .

The overlap area X is formed in detail in that the foam strip 3 has a continuous upper edge 6 that slopes down to the adhesive layer 4, but the foam strip 2 has a lower edge 10 that rises diagonally in the overlap area with the foam strip 3. Both foam strips are wedge-shaped in opposite directions in their overlapping areas.

In the embodiment of figure 5 With regard to the foam strips 2, 3, all the edge configurations of the upper free edge that have already been described or will be described below can also be implemented as alternatives, deviating from the illustration.

The embodiment of 6 basically corresponds to the embodiment of 1 , However, the edge 6 of the foam strip 3 is curved in cross-section running. As can be seen, a continuous curvature is provided without a point of inflection.

The widths B and b of the foam strips 3 and 2 are chosen to be different in the exemplary embodiments. But they can also be provided immediately. In the exemplary embodiments, in the embodiments Figures 1 to 4 , 6 and 8, 9 the width B is selected to be smaller than the width b. However, an inverse relationship can also be provided, as can be seen from the example of FIG 7 results.

The embodiment of 7 corresponds to the embodiment of 4 , except that here the otherwise integral foam strip 3 is formed with respect to its upper edge 6 with different height levels 6, 6 'and a step-like transition between them.

The embodiment of 8 corresponds to the embodiment of 6 , but in this case an upper edge 7 that is curved in cross section is also realized with respect to the foam strip 2 . A gusset 8 is formed in the transition area of the two foam strips 2, 3.

In the embodiment of 9 a curved upper edge 7 is again realized with respect to the foam strip 3 . Here, however, with an inflection point 9 in the curvature. In contrast, the foam strip 3 is formed as a rectangular profile. In addition, there is a step-like transition between the foam strip 2 and the foam strip 3 .

The foam used for the foam strips can be, for example, open-cell polyurethane foam. With regard to the height H, seen in absolute terms, a dimension can be given that also corresponds to the overall width, b+H. However, the height H can also be selected to be even higher. The height h preferably corresponds to 3/10 to 9/10 of the height H, with all intermediate values, in particular in 1/10 increments, both to limit the area from above and/or below and to represent a single relative dimension, in the revelation are included.

Claims (10)

1. Foam-sealing-strip (1) suitable for sealing a window frame, which sealing strip is preferably impregnated for delayed recovery, wherein the foam-sealing-strip (1) has two opposing narrow sides, each facing the inside or the outside of the window frame in the installed state, and broad sides suitable for abutment against the window side or reveal, wherein furthermore the narrow sides or narrow side regions are formed differently in such a way that in the installed state one narrow side has a higher vapour barrier effect than the other narrow side, wherein in addition the foam-sealing-strip (1) consists of two or more different foam strips (2, 3) which are produced separately in the initial state, which extend next to one another in a longitudinal direction of the foam-sealing-strip (1) and are each formed individually and in their combination open to vapour diffusion,
   characterized in that
   the foam strips (2, 3) extending next to one another extend to different heights starting from the same starting plane and are thus formed with a different starting thickness, wherein the different vapour barrier effect in the uncompressed state is achieved by the different heights (H, h) of the foam strips (2, 3).
2. Sealing-strip according to claim 1, characterized in that the foam-sealing-strip (1) is formed with such a width (b + B) that the same sealing strip provides sealing both to the inside of the room and to the outside of the room, wherein the foam-sealing-strip (1) extends over the entire width of a window profile in this respect, in any case the width of the window profile or, if appropriate, of a door profile, which is normally covered for sealing, and particularly preferably has a width of 55, 65 or 75 mm.
3. Foam-sealing-strip according to one of the preceding claims, characterized in that the foam strips (2, 3) have an equal width (b, B) or that the foam strips (2, 3) have a different width (b, B).
4. Foam-sealing-strip according to one of the preceding claims, characterized in that one of the foam strips (2, 3) has a rectangular profile in cross-section.
5. Foam-sealing-strip according to one of the preceding claims, characterized in that the foam strips run oblique or rounded at a freer upper cross-sectional marginal edge (6, 7, 7').
6. Foam-sealing-strip according to one of the preceding claims, characterized in that the foam strips each comprise the same foam material.
7. Foam-sealing-strip according to one of the preceding claims, characterized in that the two foam strips are seated on and secured to a same strip extending across the entire width of the foam-sealing-strip.
8. Foam-sealing-strip according to one of the preceding claims, characterized in that the foam strips are in direct contact with each other or that a gap is provided between the foam strips.
9. Foam-sealing-strip according to one of the preceding claims, characterized in that the foam-sealing-strip is impregnated for delayed recovery.
10. A window reveal comprising a window frame and a foam-sealing stripaccording to any one of claims 1 - 9.

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