FIRE PROTECTION ELEMENT HAVING A WOVEN CARRIER FABRIC

Abstract

The invention relates to a fire-protection element (1), comprising: a carrier material (2) having a woven carrier fabric; an intumescent material (3), which is applied to at least one surface of the carrier material (2) and which forms elongate structures when heat is applied; wherein the carrier material (2) has a woven carrier fabric having loops (8) for receiving the elongate structures of the intumescent material (3) that arise when heat is applied and for hooking together with said elongate structures.

Claims

1: A fire-protection element, comprising: a carrier material with a woven carrier fabric; an intumescent material that is applied on at least one s face of the carrier material and forms elongated structures under an effect of heat; wherein the carrier material is provided with a woven carrier fabric having loops, in order to receive the elongated structures of the intumescent material formed under the effect of heat and to hook together therewith.

2: The fire-protection element according to claim 1, wherein the intumescent material comprises graphite in a form that produces elongated expandable-graphite structures under the effect of heat.

3: The fire-protection element according to claim 1, wherein the woven carrier fabric of the carrier material is a knitted terry-loop fabric.

4: The fire-protection element according to claim 1, wherein at least some of the loops jut out from the carrier material in a direction of the intumescent material.

5: The fire-protection element according to claim 1, wherein the loops have an average cross-sectional area, such that the elongated structures of the intumescent material are able to engage in the loops.

6: The fire-protection element according to claim 5, wherein the loops have an average cross-sectional area that is 1.5 times larger than the average cross-sectional area of the elongated structures.

7: The fire-protection element according to claim 1, wherein the carrier material is equipped with a reinforcing layer.

8: The fire-protection element according to claim 1, wherein the carrier material is equipped with a fastening layer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Embodiments will be explained in more detail hereinafter on the basis of the attached drawings, wherein:

[0028] FIG. 1 shows a schematic diagram of a fire-protection element according to one embodiment;

[0029] FIGS. 2a and 2b show a schematic diagram of a yarn of woven glass-fiber fabric with loops and an enlarged photographic picture of such a yarn;

[0030] FIG. 3 shows a schematic diagram of the mode of action of improved adhesion between the carrier material and the intumescent material in the fire situation; and

[0031] FIG. 4 shows a schematic diagram of a further fire-protection element according to a further embodiment.

DESCRIPTION OF EMBODIMENTS

[0032] FIG. 1 shows a schematic diagram of fire-protection element 1 according to one embodiment of the present invention. Fire-protection element 1 has a substantially flat carrier material 2, on which a layer of intumescent material 3 is applied. Carrier material 2 is formed with a woven carrier fabric of woven fabric material and, at least on the surface turned toward the intumescent material, has loops with large cross section.

[0033] The woven carrier fabric is preferably formed from a fire-resistant material, such as from glass-fiber material, for example. The woven carrier fabric of glass-fiber material is manufactured by means of a glass-fiber yarn that has a series of loose loops, as is shown schematically in FIG. 2a, for example, and in a photographic picture in FIG. 2b. This glass yarn 5 has a bundle of one or more base filaments 51 and a large number of loop filaments 52, which loosely surround the base-filament bundle and thus form loops of various cross sections.

[0034] From such a glass-fiber yarn 5, it is now possible to form a woven glass-fiber fabric as the woven carrier fabric, which substantially has a structure as is known from terry-loop fabric, which is known in itself. Possible woven fabrics that may be used as woven carrier fabric 2 are, for example, THS Loomstate, E-Glass Glove with a weight per unit area of 430 g/m2 as well as HK Thermo-E-Glasgewebe PG410 Frottee.

[0035] FIG. 3 illustrates a detail of fire-protection element 1, which schematically represents a boundary face 6 between intumescent material 3 and carrier material 2 after the action of heat. The expanded intumescent material has expandable-graphite structures 7, which stretch out in wormlike elongated manner and have been formed under the effect of heat from graphite flakes common for intumescent materials. The carrier material has loops 8 at its surface. At the boundary face 6 between intumescent material 3 and carrier material 2, the formed expandable-graphite structure 7 are able to extend into the loops of woven carrier material 2 and become hooked there. The expandable-graphite structures 7 of the expanded intumescent material 3 also engage with one another, and so both a cohesive intumescent material 3 and improved adhesion of the expanded intumescent material 3 in the loops of the carrier material 2 are achieved.

[0036] In contrast to conventional fire-protection elements of this type, this effect is also preserved at the beginning of burnup of the intumescent material 3, and so falling-off of the resulting ash crust is reduced or completely suppressed.

[0037] The size and geometry of the graphite flakes for intumescent material 3 are chosen such that the average cross-sectional area of loops 8 of the woven carrier fabric of carrier material 2 is larger than the average cross-sectional area of the elongated expandable-graphite structures 7, and so these can be hooked in sufficiently high proportion into loops 8. As an example, this is achieved by the fact that the average cross-sectional area of loops 8 is larger than the cross-sectional area of expandable-graphite structures 7 being formed, preferably at least larger than 1.5 times the cross-sectional area of expandable-graphite structures 7 being formed.

[0038] As illustrated in FIG. 4, the carrier material may be equipped with a reinforcing layer 9 on a surface turned away from intumescent material 3, in order to achieve improved stability of fire-protection element 1 and in the fire situation to achieve a guided intumescent action in the direction of the side turned toward the intumescent material 3. Alternatively or additionally, a fastening layer 10 in the form of an adhesive layer or the like may also be formed on the surface of carrier material 3 turned away from intumescent material 3.

[0039] In the mounted condition, carrier material 2 may also function as a housing, in order to achieve, in the fire situation, a guided intumescent action in the direction of the interior of the housing. Thereby, when the fire-protection element is disposed around a pipe, for example, or the like, the intumescent action can be guided in the direction of the pipe.

LIST OF REFERENCE SYMBOLS

[0040] 1 Fire-protection element [0041] 2 Carrier material [0042] 3 Intumescent material [0043] 5 Glass-fiber yarn [0044] 51 Base filament [0045] 52 Loop filament [0046] 6 Boundary surface [0047] 7 Expandable-graphite structures [0048] 8 Loops [0049] 9 Reinforcing layer [0050] 10 Fastening layer