JOINT-SEALING TAPE AND SEALING ARRANGEMENT WITH SUCH SEALING TAPE

Abstract

A joint-sealing tape can be used for sealing a joint between a first building part and a second building part with an elongated carrier and at least two separate sealing strips, which have a round cross section and are disposed on the carrier, spaced apart, side-by-side and running in the longitudinal direction of the carrier.

Claims

1. A joint-sealing tape for sealing a joint between a first building part and a second building part, said joint sealing tape comprising: an elongated carrier and at least two separate sealing strips, which are disposed on the carrier, spaced apart, side-by-side and running in a longitudinal direction of the carrier, wherein the sealing strips have a round cross section.

2. The joint-sealing tape according to claim 1, wherein the sealing strips are disposed on an outer rim of the carrier.

3. The joint-sealing tape according to claim 1, wherein the sealing strips are firmly joined to the carrier at least over part of their circumference.

4. The joint-sealing tape according to claim 3, wherein the sealing strips are firmly joined to the carrier over their entire circumference.

5. The joint-sealing tape according to claim 1, wherein the sealing strips consist of a deformable material.

6. The joint-sealing tape according to claim 5, wherein the sealing strips consist of an intumescent material.

7. The joint-sealing tape according to claim 5, wherein the sealing strips consist of one piece made from one material or of multiple parts made from several materials and exist as a layered body.

8. The joint-sealing tape according to claim 1, wherein the carrier consists of a plastic film, of a fabric, or of a nonwoven.

9. A sealing arrangement for sealing a joint between two juxtaposed building parts, said sealing arrangement comprising: at least one first building part, one second building part and a joint-sealing tape according to claim 1, wherein a side with which the second building part bears on the first building part has a face (F2) with a width (B2) and the first building part has a face (F1) with a width (B1), on which the second building part bears, with the condition that the width (B2) is smaller than the width (B1) wherein the sealing strips are positioned in an outer region of the joint and are configured to seal the joint from outside.

10. The sealing arrangement according to claim 9, wherein the sealing strips are disposed laterally on the second building part.

11. The sealing arrangement according to claim 9, wherein a region of the carrier disposed between the points of attachment of the carrier to the sealing strips defines a support region, wherein the joint-sealing tape is configured in such a way that the support region of the carrier comes into contact with the second building part.

12. The sealing arrangement according to claim 9, wherein, after application of the joint-sealing tape on the second building part, the sealing strips have a projecting length (h) relative to the face (F2) of the first building part, wherein the projecting length (h) points in the direction of the face (F1) of the first building part.

13. The sealing arrangement according to claim 12, wherein the sealing strip has a predetermined radius (r) and the support region of the carrier has a width (b), wherein the width (b) is chosen in such a way as a function of the radius (r) and of the width (B2) of the face (F2) of the second building part that the width (b) corresponds at least to the width (B2) but at most is large enough that a projecting length (h) is obtained.

14. The sealing arrangement according to claim 9, wherein the first building part is a wall, a ceiling or a floor of a building structure and the second building part is a frame profile of a drywall.

Description

[0042] Further advantages and features will become obvious from the description hereinafter in conjunction with the attached drawings, wherein:

[0043] FIG. 1 shows a perspective view of a joint-sealing tape according to one embodiment of the present invention;

[0044] FIG. 2a shows a sketched front view and FIG. 2b a sectional view through a joint-sealing tape according to one embodiment of the present invention;

[0045] FIG. 3 shows a detail of a sketched front view of the joint-sealing tape from FIGS. 2a and 2b;

[0046] FIGS. 4a and 4b show a sketched front view through a building element with a joint-sealing tape according to one embodiment of an inventive sealing arrangement (FIG. 4b) and of a comparison form (FIG. 4a);

[0047] FIG. 5 shows the stepwise procedure for establishing a sealing arrangement according to FIG. 4b; and

[0048] FIG. 6 shows a sketched front view through a finished building element with the embodiment of an inventive sealing arrangement shown in FIG. 4b.

[0049] One embodiment of an inventive joint-sealing tape 1 is shown in FIGS. 1, 2a and 2b. Joint-sealing tape 1 has two sealing strips 3, 3, which are disposed on the outer rims of carrier 2. Sealing strips 3, 3 have a round cross section and are completely surrounded, i.e. over their entire circumference, by carrier 2 (FIG. 2b). As an example, sealing strips 3, 3 consist of a compressible foam and carrier 2 of a plastic film. The distance b between the two sealing strips corresponds to the distance between the points of attachment A and B of carrier 2 to sealing strips 3, 3. The region of carrier 2 defined by the region between points A and B corresponds to the support region with width b. This width b corresponds at least to the width of web 11 of channel profile 10 (see FIGS. 4a and 4b).

[0050] FIG. 3 shows a portion of joint-sealing tape 1 shown in FIG. 2a, from which the data for calculation of the size of the projecting length h can be seen. In this figure, web 11 and flange 12 of channel profile 10 are indicated by broken lines. According to this, width b of the support region is chosen in such a way as for predetermined radius r of sealing strip 3 that projecting length h always assumes a positive value but corresponds at most to the width of web 11. In order to facilitate the use of joint-sealing tape 1 and to achieve the best possible support on web 11, width b of the support region is chosen to be larger than the web width.

[0051] As already stated, projecting length h can be calculated with predetermined radius r of sealing strip 3 and predetermined web width on the basis of the following formula:

[00002]$\mathrm{Projecting}.Math..Math.\mathrm{length}.Math..Math.h=r-\sqrt{r\left(b-p\right)+{\left(\frac{b-p}{2}\right)}^2}=r-x$

where x is the value of the perpendicular from the plane of web 11 to the center of sealing strip 3 (see FIG. 3). No projecting length exists (h=0) if radius r of sealing strip 3 corresponds to the value of perpendicular x (r=x), as shown in FIG. 2a. In this case the sealing strip is not pressed against the ceiling during mounting of channel profile 10. Sealing is achieved only when the gypsum board is mounted and abuts on sealing strip 3 from underneath, thus compressing it. Projecting length h corresponds to radius r (h=r) when the support width corresponds to width b of web 11, as shown in FIG. 4b.

[0052] When joint-sealing tape 1 with the support region is applied on the channel profile of a drywall studwork (not illustrated in the figure), for example, more accurately said when it is laid on web 11 of channel profile 10, and width b of the support region is larger than the width of web 11 of channel profile 10, points A and B slip downward along the edges of web 11. As shown in FIG. 4a, the support region has been chosen to be too wide, and so sealing strips 3, 3 no longer exert pressure on ceiling 20 during mounting of channel profile 10 on ceiling 20. FIG. 4b shows the other extreme, in which the width of the support region corresponds to the width of web 11. Consequently, the projecting length achieved is too large, which makes mounting of channel profile 10 on the ceiling difficult and may lead to tearing of carrier 2, since the tension on this is very high. The optimum width b of the support region is therefore intermediate, since hereby a projecting length h is obtained that is not too large to hinder mounting of channel profile 10 on the ceiling or to cause excessive tension in carrier 2, possibly sufficient to damage it, during mounting.

[0053] Projecting length h ensures that sealing strips 3, 3 are pressed firmly on ceiling 10 and thus they are able to even out any irregularities that may be present in ceiling 20 and to seal the gap between channel profile 10 and ceiling 20 from the outside. In this way it is achieved that joint-sealing tape 1 is already applied sealingly on ceiling 20 and channel profile 10 during mounting of channel profile 10.

[0054] The use of joint-sealing tape 1 for sealing the gap between a ceiling 20, channel profile 10 of a drywall studwork and gypsum board 30 is sketched stepwise in FIG. 5. Firstly, in the first step I, joint-sealing tape 1 is laid on the web of channel profile 10 and, in the second step II, is fastened together therewith on ceiling 20 in standard manner, e.g. by screws or nails. Then, in a last step III, gypsum boards 30 are applied on the flange of channel profile 10 and pushed upward in the direction of ceiling 20, whereupon a gap remains between the top edge of gypsum board 30 and ceiling 20, which is filled with sealing strips 3, 3 of joint-sealing tape 1, in order to permit vertical movement, for example, of gypsum board 30. Thereby sealing strips 3 are compressed and thus seal the gap between the ceiling and channel profile 10 and the gap between ceiling 20 and gypsum board 30. The finished structure is shown in FIG. 6.

[0055] As is obvious from this, application is very mounting-friendly, since no additional fastening of the joint-sealing tape, for example to the profile or to the ceiling, is necessary. Accurately fitting application of the joint-sealing tape, for example against a profile, is also unnecessary, by virtue of the self-centering of the joint-sealing tape during mounting of the profile on a building part. Mounting is therefore conceivably easy, and the working effort for mounting the joint-sealing tape is greatly reduced.

[0056] Regardless of the pressure exerted by the gypsum board, well-defined pressing of the sealing strips against the underlying surface is achieved by the inventive configuration of the joint-sealing tape. Via the choice of the material from which the sealing strips are made, a well-defined spacing can be easily adjusted between a gypsum board and the underlying surface on which the profile is mounted. Furthermore, when used in an expansion joint, the sealing strips hinder movement much less than compared with the known sealing solutions, so that it is possible to work with only a relatively small joint width in order to achieve adequate absorption of movement.

[0057] The invention therefore achieves safe and reliable sealing of joints between two building parts, especially between a profile of a drywall studwork and a building part adjacent thereto, such as, for example, a ceiling, wall or floor. In this connection, two-sided sealing can be achieved in only one operation, by providing a prefabricated sealing element.