Fire-protection tape

Abstract

A fire-protection tape (22) to be placed into gaps (12) in walls or ceilings (10) of buildings has at least two plies (24a, 24b) composed of an intumescent material, wherein the plies (24a, 24b) have a first longitudinal edge (26a, 26b) on one outer side and a second longitudinal edge (28a, 28b) on an opposite outer side, in each instance, wherein the plies (24a, 24b) are flexibly connected with one another.

Claims

1. A fire-protection tape comprising: at least two plies comprising an intumescent material; and a flexible connector which flexibly connects the plies with one another, such that said plies can be pivoted relative to one another, wherein the plies have a first longitudinal edge on one outer side and a second longitudinal edge on an opposite outer side, in each instance; and wherein the connector is connected with the plies only at their first longitudinal edges or only at their second longitudinal edges, in each instance.

2. The fire-protection tape according to claim 1, wherein the plies are connected with one another in such a manner that they are pressed apart by activation of the intumescent material, at a longitudinal edge, and subsequently can gape apart.

3. The fire-protection tape according to claim 1, wherein the connector is a woven fabric.

4. The fire-protection tape according to claim 1, wherein the connector has a flexible expansion region between the plies.

5. The fire-protection tape according to claim 4, wherein the connector is folded at least once.

6. The fire-protection tape according to claim 1, wherein the plies are connected with the connector over the connector's full area.

7. The fire-protection tape according to claim 6, wherein the connector is connected with the two plies on their surfaces that face away from one another.

8. The fire-protection tape according to claim 1, wherein the connector extends into the plies, at least in part.

9. The fire-protection tape according to claim 1, wherein the connector connects the plies with one another with shape fit and/or material fit, wherein the connector can be dissolved at a temperature below the intumescence temperature of the two plies.

10. The fire-protection ape according to claim 9, wherein the connector is a thread, a clip or a connection layer, wherein the thread, the clip or the connection layer has a softening, melting or decomposition temperature below the intumescence temperature of the two plies.

11. The fire-protection tape according to claim 10 comprising a thread or a clip, wherein the thread or clip comprises a plastic, the softening, melting or decomposition temperature of which lies below the intumescence temperature of the two plies.

12. The fire-protection tape according to claim 11, wherein the thread or clip consists of a plastic, the softening, melting or decomposition temperature of which lies below 60 C.

13. The fire-protection tape according to claim 10, wherein the connection layer is a double-sided adhesive tape.

14. The fire-protection tape according to claim 10, wherein the thread, the clip or the connection layer has a softening, melting or decomposition temperature below 60 C.

15. The fire-protection tape according to claim 1, wherein the connector is a woven fiberglass fabric.

16. The fire-protection tape according to claim 1, wherein the plies are connected with the connector over its full area and are glued onto it.

17. The fire-protection tape according to claim 1, which is placed in a gap in a wall or a ceiling of a building.

18. A fire-protection tape comprising: at least two plies comprising an intumescent material; and a thread or clip as a connection between the two plies, which connects the plies with one another with shape fit and/or material fit, wherein the plies have a first longitudinal edge on one outer side and a second longitudinal edge on an opposite outer side, in each instance; wherein the plies are flexibly connected with one another such that said plies can be pivoted relative to one another; wherein the connection can be dissolved at a temperature below the intumescence temperature of the two plies; and wherein the connection comprises a plastic, the softening, melting or decomposition temperature of which lies below the intumescence temperature of the two plies.

19. The fire-protection tape according to claim 18, wherein the thread or clip consists of a plastic, the softening, melting or decomposition temperature of which lies below 60 C.

Description

(1) Further advantages and characteristics are evident from the following description in connection with the attached drawings. These show:

(2) FIG. 1 a gap in a ceiling, with a fire-protection tape according to the invention,

(3) FIG. 2 the gap from FIG. 1 with an activated fire-protection tape,

(4) FIG. 3 a second embodiment of a fire-protection tape according to the invention, and

(5) FIG. 4 a third embodiment of a fire-protection tape according to the invention.

(6) In FIG. 1, a ceiling 10, for example composed of concrete, is shown, having a gap 12, through which a line 14 is laid. The line 14 is, for example, a water pipe or sewer pipe, which consists of plastic, for example polyethylene or polypropylene.

(7) On the top side 16 of the ceiling 10, a cover element 18 is provided in the ring-shaped slot between line 14 and ceiling edge. On the underside 20 of the ceiling 10, a fire-protection tape 22 is disposed in the slot, which tape can close off the gap 12 in the event of a fire, and thereby prevent or at least delay entry of smoke or fire.

(8) The fire-protection tape 22 is supplied as an endless material, for example on a roll, and laid circumferentially around the line 14 and into the gap 12.

(9) As can be seen in FIG. 1, the fire-protection tape 22 has two plies 24a, 24b that are continuous in the longitudinal direction, composed of an intumescent material that foams up under the effect of heat and in this way increases its volume, thereby making it possible to close off the gap 12 and to prevent entry of fire or smoke. The plies 24a, 24b have a first longitudinal edge 26a, 26b, which faces the underside 20, as well as an opposite second longitudinal edge 28a, 28b, in each instance.

(10) As can be seen in FIG. 1, the plies 24a, 24b are flexibly connected with one another at the second longitudinal edges 26a, 26b by a flexible connection means 30, in this embodiment a woven fabric tape with a woven fiberglass fabric. The connection means 30 extends into the plies 24a, 24b, so that the plies 24a, 24b are connected with the connection means 30 with shape fit, wherein the connection means 30 extends from the second longitudinal edges 28a, 28b all the way to the first longitudinal edges 26a, 26b. The plies 24a, 24b can be pivoted about their second longitudinal edges 28a, 28b, relative to one another, by this flexible connection means.

(11) Furthermore, a connection layer 32 is provided, which is assigned to the first longitudinal edges 26a, 26b in this embodiment, and fixes the two plies 24a, 24b in place relative to one another. This connection layer 32 has a melting temperature clearly below the intumescence temperature of the plies 24a, 24b, which usually lies in the range of approximately 200 C. Preferably, the melting temperature of the connection layer lies at approximately 60 C.

(12) Production of the fire-protection tape 22 takes place, for example, in that a ply composed of an intumescent material capable of flow or capable of being brushed is cast into a mold. Subsequently, the connection means 30 is laid onto the material. Dependent on how liquid the material is, the connection means 30 can sink into it or remain lying on its surface, and can connect with it with material fit. If the connection means 30 does not sink into the material, further material can be introduced into the mold, so that the connection means 30 is enclosed by it.

(13) Subsequently, the connection layer 32 is applied to the surface, for example laid on. This can take place in the still damp state of the material, so that the connection layer 32 connects with the material with material fit.

(14) In a final production step, the material is laid together with the connection means 30, in the not yet hardened state of the material, in such a manner that the intermediate ply is situated between two sections of the material, which define the first and the second ply 24a, 24b, in each instance.

(15) In the event of a fire, the face side formed by the first longitudinal edges 26a, 26b of the fire-protection tape 22 is exposed to the fire and heated. The connection layer 32 is also heated with it at the same time.

(16) Because the melting temperature of the connection layer lies far below the intumescence temperature of the two plies 24a, 24b, this layer already melts before the plies 24a, 24b foam up. Therefore the plies 24a, 24b are no longer connected with one another before a foaming process, and can move flexibly relative to one another, about the second longitudinal edges 28a, 28b.

(17) As can be seen in FIG. 2, the material begins to foam up at the first longitudinal edges 26a, 26b, thereby causing the plies 24a, 24b to be pressed apart at the first longitudinal edges 26a, 26b. The second ply 24b is pressed away from the edge of the gap 12 or in the direction of the line 14 with the first longitudinal edge 26a, due to the foaming of the material at these longitudinal edges 26a, 26b. Because of the low melting temperature of the line 14, the latter has already melted or is clearly constricted. The second ply 24b is moved into the resulting cavity.

(18) As can be seen in FIG. 2, a large portion of the cross-section of the gap 12 is closed off by the plies 24a, 24b gaping apart, even before the material of the plies 24a, 24b has completely foamed up, particularly by means of the second ply 24b, which projects into the gap 12. Because a significantly greater surface area is subsequently present on the individual plies 24a, 24b, which is exposed to fire, faster heat introduction and thereby faster foaming of the plies 24a, 24b takes place, so that the gap 12 can be closed faster. Furthermore, a significantly greater volume can be filled and thereby a larger cross-section can be closed off with the multi-ply fire-protection tape 22 according to the invention than is the case with a single-ply fire-protection tape having the same thickness, because the plies 24a, 24b are moved apart before foaming and therefore do not hinder one another during foaming. The plies 24a, 24b can be connected with one another in any desired manner, as long as they can be moved relative to one another at the first longitudinal edges 26a, 26b or the second longitudinal edges 28a, 28b while the material of the plies 24a, 24b foams up.

(19) A second embodiment is shown in FIG. 3, for example. This embodiment essentially corresponds to the embodiment shown in FIGS. 1 and 2. However, the connection means 30 does not extent into the plies 24a, 24b, but rather is connected with the plies 24a, 24b on their surfaces that face one another, particularly glued onto them.

(20) Furthermore, an expansion region 34 is provided between the plies 24a, 24b, which is formed by a region of the connection means 30 that is folded multiple times, which region, in the starting state of the fire-protection tape 22, is disposed between the plies 24a, 24b. This expansion region allows a certain separation movement of the second longitudinal edges 28a, 28b, so that these can additionally move apart during foaming of the plies 24a, 24b.

(21) A further embodiment is shown in FIG. 4. In this embodiment, the connection means is embedded into the plies in accordion-like manner, so that a different unfolding geometry occurs. In particular, in this embodiment, not only can the first longitudinal edges 26a, 26b move apart from one another, but the second longitudinal edges 28a, 28b can do so as well.

(22) Fundamentally, it is conceivable that the plies 24a, 24b move apart from one another in any desired manner, in the event that they start to foam up. In particular, the reciprocal movement of the plies 24a, 24b can be adapted to the respective area of application or to the size of the gap to be closed.