JOINT TAPE

Abstract

Joint tape 1 for attachment to a ceiling or a wall, the joint tape 1 comprising a layer of permeable non-woven material 2 and an adhesive layer 3 attached to the permeable non-woven material 2, the adhesive layer 3 being applied to one side of the non-woven material in a pattern comprising sections 21 without adhesive applied thereto and wherein the joint tape 1 has a width of 3 mm to 20 mm.

Claims

1. Joint tape for attachment to a ceiling or a wall, the joint tape comprising a layer of permeable non-woven material and an adhesive layer attached to the permeable non-woven material, the adhesive layer being applied to one side of the non-woven material in a pattern comprising sections without adhesive applied thereto, and wherein the joint tape has a width of 3 mm to 20 mm.

2. Joint tape according to claim 1, wherein the adhesive layer is a self-adhesive layer.

3. Joint tape according to claim 1, wherein the adhesive layer has a weight in the range of 3 to 60 g/m.sup.2.

4. Joint tape according to claim 1, wherein the adhesive layer comprises a regular pattern of glue dots.

5. Joint tape according to claim 4, wherein each glue dot has an identical size, preferably having a diameter in the range between 0.1 to 4.0 mm, preferably between 0.1 to 2.0 mm.

6. Joint tape according to claim 4, wherein the regular pattern comprises 25 to 15625 glue dots per 625 mm.sup.2, preferably 100 to 6400 glue dots per 625 mm.sup.2.

7. Joint tape according to claims 1 to 3, wherein the adhesive layer is applied as a regular pattern comprising glue stripes or as an irregular pattern comprising glue stripes.

8. Joint tape according to claim 1, wherein the adhesive layer comprises a polymer material and wherein the polymer material preferably comprises at least one of the group of acrylates and rubber.

9. Joint tape according to claim 8, wherein the adhesive layer comprises a hot melt adhesive, a dispersion-based adhesive or a solvent-based adhesive.

10. Joint tape according to claim 1, wherein the layer of permeable non-woven material comprises a non-woven material of at least 30 to 100 weight-% of glass-, mineral-, carbon- or synthetic-fibers.

11. Joint tape according to claim 1, wherein the joint tape has a grammage of 15 to 100 g/m.sup.2 and/or a thickness of 15 to 80 μm.

12. Joint tape according to claim 1, wherein the air permeability of joint tape is 2000 to 7000 l/m.sup.2s.

13. Joint tape according to claim 1, wherein the joint tape has a width of 4 mm to 15 mm, preferably of 5 to 10 mm, more preferably of 7 to 9 mm, most preferably of 8 mm.

14. Method for providing a closed surface of building panels comprising the steps of: providing a surface of building panels; applying a joint tape according to any one of the preceding claims to the joints of the surface of building panels; applying a paint or a joint filler covering at least the edge of the joint tape and the adjacent building panels comprising the joint tape; and optionally sanding the edge area of the joint tape.

15. Use of a joint tape according to claim 1 for sealing joints on a surface of building panels.

Description

[0033] In the following, the invention will be explained in more detail with reference to drawings. Like reference numerals denote similar features throughout the drawings.

[0034] The drawings show:

[0035] FIG. 1 top view of a section of a joint tape for attachment to a ceiling according to the invention;

[0036] FIG. 2 side view of the joint tape shown in FIG. 1; and

[0037] FIG. 3 cutout of an acoustic ceiling having a joint tape applied on top of the joint of two perforated building panels.

[0038] In FIG. 1 a section of a joint tape 1 for attachment to a (acoustic) ceiling is illustrated. Such a section for example can be cut from a roll in which joint tape 1 is available in the market. Joint tape 1 comprises a layer of permeable non-woven material 2 and an adhesive layer 3 attached to the non-woven material 2.

[0039] The application of the illustrated joint tape 1 to a layer of building boards requires no liquid adhesive during the installation so that the application is clean and no pre-arrangements, like covering the floor, are required before the installation.

[0040] In the shown example, the non-woven material comprises synthetic fibers, which provide dimensional stability. The grammage of the non-woven is in the illustrated example in the range of 10 to 70 g/m.sup.2. The permeable non-woven material 2 has a thickness of 8 to 40 μm while providing an air permeability in the range of 1000 to 15000 l/(m.sup.2s).

[0041] The adhesive layer 3 is arranged at one side of the non-woven material 2 in a regular pattern of glue dots 31. In the illustrated example, the adhesive layer 3 has a weight of 3 to 60 g/m.sup.2, The pattern comprises glue dots 31, preferably of an identical size, which are arranged in an amount in the range of 25 to 15625 glue dots per 625 mm.sup.2. The adhesive may be a hot melt adhesive made of an UV-light curable acrylic polymer material.

[0042] The circular area 2 shows an enlarged section of the joint tape 1 in the top view. It illustrates areas 21 without adhesive applied thereto and glue dots 31.

[0043] In a particular example, the joint tape 1 as shown in FIG. 1 is made of a non-woven material 2 “Vlies VILEDON T 1790C” available in the market from Freudenberg Viiesstoffe/Weinheim consisting of 100% glass fiber, 30 g/m.sup.2 weight/area and an air permeability of about 8.000 l/(m.sup.2×s) (measured with AKUSTRON from rycobel group ib-walther/Uffenheim).

[0044] An adhesive layer 3 is applied to the exemplified non-woven material 2, the adhesive layer 3 having a weight/area in the range of 2.0 to 2.5 g/m.sup.2 and is a hot melt adhesive e.g. “Technomelt 8783” from Henkel/Düsseldorf. The adhesive layer 3 is applied with a 20 dpi-pattern of glue dots 31 so that the air permeability of the adhesive layer 3 is about 6.000 l/(m.sup.2s) determined by the above mentioned AKUSTRON device. The joint tape 1 has in this specific example a width of 8 mm.

[0045] The adhesive layer 3 can be covered and protected by the silicone layer of a one side siliconized paper (not shown), e.g. RB065/2 from Cotek Papers Ltd/Draycott, Great Britain, in order to allow for rolling up of the joint tape. The protective siliconized paper has to be removed before applying the joint tape to a ceiling or a wall.

[0046] The particular combination of non-woven material 2 and adhesive layer 3 that is shown in FIG. 1 is preferred, but generally, the non-woven material 2 and the adhesive layer 3 can be combined without restriction within the above-mentioned ranges.

[0047] In FIG. 2 a side view of a section of the joint tape 1 for attachment to a ceiling or a wall is illustrated. In the side view, as well, can be seen that the joint tape 1 comprises a layer of permeable non-woven material 2 and an adhesive layer 3 attached to the non-woven material 2. In the circle 2 below, an enlarged section of the joint tape 1 is illustrated in the side view, which gives a detailed illustration of the thickness of the adhesive joint tape 1, which can be in the range of 15 to 80 μm and the thickness of the permeable non-woven material 2 which is in the range of 8 to 40 urn.

[0048] In FIG. 3 a cutout of an acoustic ceiling 4 having a joint tape 1 applied on two building panels 5 with perforations 6. The joint tape 1 explained in connection with the foregoing figures is attached to an acoustic ceiling. The acoustic ceiling is installed by the method described herein which starts with providing a (plurality of) perforated building panel(s) 5,6 to form the ceiling surface.

[0049] Thereafter, joint tape 1 is applied to the joints 7 for selectively covering the joints (or gaps) between the building panels 5.

[0050] Thereafter paint or a joint filler is applied to the attached joint tape 1 and at least part of the ceiling surface (uncovered building boards) to firmly attach the joint tape 1 to the building panels and to obscure the edge of joint tape 1, Finally, the edge (area) of joint tape 1 can be sanded.

[0051] However, for clarification reasons in FIG. 3 the edges of joint tape 1, which are obscured according to the method described herein, are shown.

[0052] In a specific example, the joint tape is attached to an acoustic ceiling made of plasterboards which are available in the market as CLEANEO CLASSIC 8/18R (Knauf Gips KG/Iphofen).

[0053] For example, the applied joint tape is covered either by the paint KNAUF INTOL (Knauf Gips KGilphofen) or by the joint filler KNAUF UNIFLOTT FINISH (Knauf Gips KG/Iphofen).