JP2017179945A - Fireproof shield material and fireproof shield structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a structure that is thinner than a thicker structure in which multiple thick gypsum boards are stacked to achieve the same or higher level of heat shield property and fire resistance as the thicker structure.SOLUTION: A fireproof shield material 1 is formed of front and rear layers 1a, 1b, which are formed by laminating in a thickness direction and compacting two layers among a thermal expanding layer in which a thermal expansion material such as expanded graphite or vermiculite that expands on heating is blended into a wool mat in which hot-melt heat-resistant inorganic fibers made of rock wool or glass wool pile up and intertwine, a flame arresting layer in which a thermal fusion material such as glass that prevents the flame from penetrating by melting on heating is blended into the wool mat, and a heat absorbing layer into which a heat absorbing material such as aluminium hydroxide that absorbs heat is blended. A fireproof shield structure is formed of the fireproof shield material 1 and a plate-like body formed of gypsum boards 5, 5 that are integrally laminated at least on one of front and rear faces of the fireproof shield material 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fireproof shield material and a fireproof shield structure using the same.

  Conventionally, as a fireproof shield structure to protect wood structural materials and steel frames in buildings from heating such as fire, a structure in which multiple plasterboards (reinforced gypsum) are stacked, foam-based fireproof expansion on the surface of wood structural materials and steel frames In general, a structure in which a paint is applied to form a fire-resistant coating film, a structure in which a foamed fire-resistant sheet is applied to the surface of a wood structure material or a steel frame, and the like are known.

  In the structure in which a plurality of gypsum plates are stacked, for example, by setting two sheets of 21 mm thick gypsum plates (reinforced gypsum) or by stacking 15 mm and 21 mm thick gypsum plates (reinforced gypsum), In general, a construction method in which high heat conduction due to a flame at the time of fire is suppressed to protect the wood structure material and the steel frame, or heating in the building is suppressed to develop a fireproof structure. However, in this construction method, since a plurality of gypsum boards having a large thickness are used, it is inevitable that not only the total thickness is increased but also the weight is increased. .

  In addition, in the structure that forms a fire-resistant coating film by applying a foam-based fire-resistant expansion paint, it is necessary to perform construction management such as uniformity of the coating thickness in order to obtain stable fire resistance, and the burden for that is large, Therefore, there is a problem that the total cost becomes high. In addition, when applying a cosmetic material to the surface, there is a problem in unevenness and smoothness.

  Furthermore, in the structure using a foam-type fireproof sheet, the construction is easier than the foam-based fireproof paint, but it is difficult to handle as a face material, so that construction of a large area becomes difficult. In addition, it is difficult to apply makeup or the like on the upper surface due to low smoothness. There is also the problem of high prices.

  Thus, conventionally, as shown in Patent Document 1, for example, a heat-expandable fiber felt including mineral fibers such as rock wool and ceramic wool and a heat-expandable inorganic powder has been proposed.

Japanese Patent No. 4264164

  In the thing of the said patent document 1, when a felt is heated at the time of a fire, a heat-expandable inorganic powder expand | swells and comes to suppress the heat conduction of the thickness direction of a felt, and fire resistance comes to be acquired. Yes.

However, the felt is only made from a slurry containing the composition and dried and cured, and there is a limit to reducing the thickness. As a matter of course, if the thickness is reduced, it is inevitable that the fire-resistant performance will be affected accordingly.The present invention has been made in view of such a point, and its purpose is to devise a fire-resistant shield material containing mineral fibers. In other words, heat insulation and fire resistance equivalent to or higher than those of a structure in which a plurality of gypsum boards having a large thickness are stacked can be achieved by a structure having a thinner thickness.

  In order to achieve the above object, according to the present invention, the fireproof shield material is any one of three layers in which a heat-expandable heat-resistant inorganic fiber wool mat includes a heat-expandable material, a heat-meltable material, and a heat-absorbing material. Two or more layers were laminated in the thickness direction to be consolidated.

  Specifically, the fireproof shielding material of the first invention is a heat expansion layer in which a heat expansion material that expands by heating is blended as a functional material on a wool mat in which heat-meltable heat-resistant inorganic fibers are stacked and intertwined with each other, and A flame prevention layer in which a heat-melting material that melts by heating and prevents the permeation of flame is blended as a functional material in the wool mat, and heat that is blended in the wool mat as a functional material. Among the absorption layers, at least two layers are laminated in the thickness direction and are composed of a plurality of layers that are consolidated. Here, consolidation means that the heat-melting heat-resistant inorganic fibers that have been piled up gently have been densified by compression and the degree of adhesion between the fibers has increased, and has improved handling and workability. is there.

  In the first invention, when the fireproof shield material is applied to, for example, the outer wall of a building and the outer wall is exposed to a flame such as a fire, different functions blended in each of the plurality of layers stacked. The material (heat expansion material, heat melting material, heat absorption material) exhibits the characteristics specific to the functional material, and the fire resistance of the fireproof shield material is obtained by combining these different characteristics.

  For example, in the heat-expandable layer, the heat-expandable material contained in the heat-meltable heat-resistant inorganic fiber wool mat is heated to expand, and the heat-expandable layer expands the heat-expandable layer (fireproof shield material) in the thickness direction. And heat insulation ability is demonstrated. In addition, in the flame prevention layer, the heated molten material contained in the same wool mat is melted by heating to form a film, and this molten film-shaped heated molten material serves as a barrier layer to prevent transmission of flame. Insulation ability is demonstrated. Furthermore, in the heat absorption layer, the heat absorbing material contained in the wool mat absorbs heat, so that the heat insulation ability is exhibited.

  Temporarily, three types of functional materials (heat expansion material, heat melt material, heat absorption material) contained in each of these three layers were blended in the same wool mat at the same time to constitute a fireproof shield material of only one layer. In this case, it is necessary to expand with good response to heating in order to exhibit the heat insulation ability by the expansion of the heat expansion material, whereas it exhibits the function of blocking the hot air flow with a dense structure by melting the heat melting material. This is the opposite structure to the heat insulation ability exerted by the expansion of the heat expansion material, and the heat absorption material also suppresses the heat and slows the response of the heat expansion. It is difficult to make it.

  On the other hand, in the present invention, the role related to the fireproof shield is shared by the layers, and by providing each layer with a plurality of fireproof functions that conflict in a sense, each effect can be exhibited individually. It is possible to exert a remarkable function that is not halfway.

  Also, at that time, each layer in the fire-resistant shield material is different from general fire-resistant expansion paints and sheet materials, and is based on a wool mat in which heat-melting heat-resistant inorganic fibers are stacked and intertwined. The floc stacking and entanglement structure creates an effective void and exhibits heat insulation.

  With such a fireproof shield effect, a heat shield and fire resistance equivalent to or better than a structure in which a plurality of thick gypsum boards are stacked can be achieved by a structure having a thinner thickness.

  In addition, each layer of the fireproof shield material is a compacted mixture of functional materials in a wool mat in which heat-meltable heat-resistant inorganic fibers are stacked and entangled with each other. The entanglement is maintained. Thus, the fireproof shield material does not collapse and the expanded material is not scattered, and the fireproof shield material is stably retained as a heat insulating layer.

  Furthermore, since the fireproof shield material has a multilayer structure composed of a plurality of layers, discontinuity between layers occurs at an interface existing between adjacent layers. When the fireproof shield material is heated, the heat conduction in the thickness direction is suppressed as a resistance at the discontinuous interface, and the fireproof shield effect can be further increased.

  According to a second invention, in the first invention, a heat transfer suppressing material is interposed at an interface between a plurality of layers of the fireproof shield material.

  In the second invention, since the heat transfer suppressing material is interposed at the interface between the plurality of layers, when the fireproof shield material is heated, the heat conduction in the thickness direction is blocked by the heat transfer suppressing material at the interface. Further, the fireproof shielding effect can be increased.

  A third invention is characterized in that, in the second invention, the heat transfer suppression material has a function different from that of the functional material blended in the layers adjacent to both sides of the interface.

  In the third aspect of the invention, the function of the heat transfer suppression material interposed at the interface is different from the function material blended in the layers adjacent to both sides of the interface, so the two layers and the interface between both layers Three different types of fireproof shielding functions can be exhibited by the heat transfer suppression material, and the fireproof shielding effect can be further increased.

  According to a fourth invention, in the second or third invention, the heat transfer suppression material is a heat-melting material that melts by heating and prevents permeation of a flame.

  In the fourth aspect of the invention, when the refractory shield material is heated, the heated molten material is melted by heating to prevent the permeation of the flame, whereby the heat conduction in the thickness direction of the refractory shield material is reduced at the interface. It is blocked by the heated molten material, and the fireproof shielding effect can be further increased.

  According to a fifth invention, in the second or third invention, the heat transfer suppression material is a heat expansion material that expands by heating.

  In this fifth invention, when the fireproof shield material is heated, the heat expansion material expands by heating to become a heat insulating layer, and thus the heat conduction in the thickness direction of the fireproof shield material is the heat expansion material at the interface. It is blocked by the (heat insulating layer), and the fireproof shielding effect can be further increased.

  According to a sixth invention, in the second or third invention, the heat transfer suppressing material is a heat absorbing material.

  In the sixth aspect of the invention, when the fireproof shield material is heated, the heat conducted in the thickness direction of the fireproof shield material is absorbed by the heat absorbing material at the interface, thereby further increasing the fireproof shield effect. be able to.

  A seventh invention relates to a fireproof shield structure, and the fireproof shield structure includes any one of the first to sixth fireproof shield materials and gypsum integrally laminated on at least one of the front and back surfaces of the fireproof shield material. And a plate-like body made of at least one of a board or a calcium plate.

  In this seventh invention, a fireproof shield structure having a fireproof shield material and a plate-like body laminated and integrated on at least one of the front and back surfaces thereof is constructed on, for example, an outer wall of a building, and the outer wall is exposed to a flame such as a fire. When exposed, the functional materials (heat expansion material, heat melt material, heat absorption material) blended in each of the plurality of layers of the fireproof shielding material exhibit different characteristics unique to the functional material, and these different The fire resistance of the fireproof shield material is obtained by combining the characteristics, and the heat insulation of the fireproof shield structure is expressed.

  In addition, each layer of the fireproof shield material is compacted by blending a functional material into a wool mat in which heat-meltable heat-resistant inorganic fibers are stacked and entangled with each other. Thus, the fireproof shield material does not collapse, and the fireproof shield material can be stably retained as a heat insulating layer.

  As described above, according to the present invention, at least two of the three layers in which different types of functional materials are individually blended with a wool mat in which hot-melt heat-resistant inorganic fibers are stacked and intertwined are thickened. By laminating in the direction and consolidating, and providing a fireproof shielding material consisting of multiple layers with different compositions, the functional material blended into each of the multiple layers by heating due to fire etc. exhibits unique characteristics, these The fire resistance of the fireproof shield material is obtained by combining these different characteristics. Therefore, a heat shield and fire resistance equal to or better than a structure in which a plurality of thick gypsum boards are stacked are achieved by a structure having a smaller thickness. In addition, the heat-resistant shield material in which the heat-resistant heat-resistant inorganic fibers are stacked and intertwined with the wool mat is consolidated, the inorganic fibers are melted by heating and the entanglement is maintained, and the fire-resistant shield material does not collapse. The fireproof shield material can be stably retained as a heat insulating layer.

FIG. 1 is a side view schematically showing a fireproof shield material according to Embodiment 1 of the present invention. FIG. 2 is a side view schematically showing the fireproof shield structure. FIG. 3 is a side view schematically showing the fireproof shield material according to the second embodiment. FIG. 4 is a side view schematically showing a modified example of the fireproof shield structure. FIG. 5 is a diagram showing a test result of the fireproof shield structure.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the embodiments is merely illustrative in nature and is not intended to limit the present invention, its application, or its use at all.

(Embodiment 1)
FIG. 1 shows a fireproof shielding material 1 according to Embodiment 1 of the present invention. This fireproof shield material 1 is made of a thin plate material having a two-layer structure of 6 mm thickness having a surface layer 1 a and a back layer 1 b each having a thickness of 3 mm, for example, and an interface 1 c is formed between both layers 1 a and 1 b.

  The composition of the surface layer 1a and the back layer 1b in the fireproof shield material 1 is different from each other, and is a combination of two of the following three types of layers.

  That is, the three types of layers are, for example, a heat-expandable layer in which heat-fusable heat-resistant inorganic fibers made of rock wool are stacked and intertwined with each other, a heat-expandable layer blended as a functional material, and a similar wool mat. These are a flame prevention layer in which a heat melting material is blended as a functional material and a heat absorption layer in which a heat absorbing material is blended as another functional material in the same wool mat. The surface layer 1a and the back layer 1b are two layers selected and combined from these three types, and the fireproof shield material 1 is consolidated by stacking the surface layer 1a and the back layer 1b in the thickness direction. It consists of two layers (multiple layers).

  When combining two of these three layers of the heat expansion layer, the flame prevention layer and the heat absorption layer, (A) the heat expansion layer and the flame prevention layer are combined, and one of them is the surface layer 1a and the other is the back layer 1b. A combination of (B) one of the flame prevention layer and the heat absorption layer as the surface layer 1a and the other as the back layer 1b, and (C) one of the heat absorption layer and the heat expansion layer as the surface layer 1a, and the other as the surface layer 1a. There are three types of combinations with the combination of the back layer 1b.

  The heat-expandable material contained in the heat-expandable layer is a material that expands when heated, and this heat-expandable material is blended in the wool mat so that the heat-expandable layer (and hence the fireproof shield material 1) is heated when heated. It expands in the thickness direction due to the expansion of the expansion material. For example, expanded graphite or vermiculite is used as the heat expansion material.

  Moreover, the heat-melting material contained in the flame prevention layer is melted by heating to form a film and prevents the permeation of the flame. For example, glass or the like is used.

  Furthermore, the heat absorbing material contained in the heat absorbing layer is a material that absorbs the heat when heated, and for example, aluminum hydroxide or the like is used.

  The refractory shield material 1 is formed from slurry by wet papermaking. This slurry is composed of, for example, the heat-meltable heat-resistant inorganic fiber and any one of the heat-expandable material, the heat-melted material, and the heat-absorbing material as main components for each of the front and back layers 1a and 1b of the fireproof shield material 1. The two types are formed by mixing and stirring into two sheets, and simultaneously forming these two types of slurry to form two wet mats. A fireproof shield material 1 having a structure is formed. By such press treatment after papermaking, the fireproof shield material 1 becomes a wool mat in which heat-meltable heat-resistant inorganic fibers are stacked and entangled in both the surface layer 1a and the back layer 1b. A molten material or a heat absorbing material is blended and consolidated. The specific gravity of the fireproof shield material 1 is in the range of 0.1 to 1.2, and is preferably about 0.9.

  As the heat-meltable heat-resistant inorganic fiber, usually slag wool made from iron blast furnace slag as rock wool is used, but glass wool may be used instead of rock wool, and rock wool and glass wool are mixed. It may be a thing. In short, any inorganic fiber that has the property of being melted by heating and that can suppress the collapse of the refractory shield material 1 by forming a film by melting, such as ceramic wool, does not melt by heat. Since such an effect does not arise, it is not preferable.

  In addition, a component that animates by heating, for example, a saccharide such as pentaerythritol, may be added to the front and back layers 1 a and 1 b of the fireproof shield material 1. As described above, the refractory shield material 1 prevents the heat-melting heat-resistant inorganic fibers (rock wool, etc.) from being entangled during heating and induces expansion in the thickness direction due to the stacked structure. There is no need to add a sacrificial component. However, by adding the sanitizing component, it is possible to more reliably prevent the collapse during heating.

  FIG. 2 shows a fireproof shield structure S using such a fireproof shield material 1. The fireproof shield structure S is constructed as a fireproof shield, for example, on the outer wall of a building. The fireproof shield structure S includes the fireproof shield material 1 and two plaster boards 5 and 5 that are integrally laminated on the front and back surfaces of the fireproof shield material 1, respectively. It has a structured.

  Each of the gypsum boards 5 is composed of, for example, a reinforced gypsum board for fire resistance. The thickness of the gypsum board 5 on the front side (upper side in FIG. 2) is, for example, 12 mm, and the gypsum board 5 on the back side (lower side in FIG. 2) The thickness is, for example, 15 mm thicker than the front side. Therefore, the total thickness of the fireproof shield structure S is, for example, 33 (= 6 + 12 + 15) mm.

Moreover, the fireproof shield material 1 and the two gypsum boards 5 and 5 do not necessarily have to be connected, and may be integrated in a laminated state. Further, the fireproof shield material 1 and the gypsum board 5 on the back side. A metal foil 7 is interposed between the two. The metal foil 7 has a thickness of 15 to 40 μm and is preferably an aluminum foil. For example, copper foil, silver foil, gold foil, or the like may be used instead of the aluminum foil.

  In addition, a metal foil 7 may be interposed between the fireproof shield material 1 and the gypsum board 5 on the front surface side, and furthermore, metal foils are respectively disposed between the fireproof shield material 1 and the gypsum boards 5 and 5 on the front and back sides. 7 may be interposed.

  The composition and manufacturing method of the fireproof shield material 1 are as follows.

(composition)
(1) Heat-meltable heat-resistant inorganic fiber Rock wool, slag wool, glass fiber and nickel wool are used as main materials, and the addition rate is 20 to 75% by weight.
(2) Heat expansion material It consists of expanded graphite and vermiculite, and the addition rate is 2 to 45% by weight. The thermal expansion ratio of general expanded graphite is about 200 times (cm ³ / g), and the addition rate of 40% is excessive (easily collapsed due to expansion during heating). On the other hand, vermiculite has a thermal expansion ratio of 10 to 15 times and does not reach expanded graphite, so about 45% may be added.

Vermiculite can lower the foaming start temperature by an impregnation treatment with a sulfuric acid compound.
(3) Heat-melting material Glass, frit, and animation component (pentaerythritol) that melt at 800 ° C. or lower are used. The addition rate is 0 to 30% by weight.
(4) Heat absorber Aluminum hydroxide, magnesium hydroxide, etc. are used. This is to reduce the temperature by evaporation of crystal water, to suppress unnecessary high-speed expansion during heating, to prevent the expansion body from collapsing, and to suppress the temperature transmission to the back surface. The addition rate is 0 to 30% by weight.
(5) Polymeric water-based adhesive This is made up of PVA, starch, vinyl acetate emulsion, etc. to compensate for the insufficient strength of the water-resistant adhesive. The addition rate is preferably 15% by weight or less from the viewpoint of water resistance and dimensional stability.
(6) Water-resistant adhesives As powder binders, phenolic (resole, novolak), and as emulsion binders, self-emulsifying type isocyanate adhesives (MDI, etc.), various epoxies, acrylics, Acrylic urethane and urethane are used. The addition rate is 0.1 to 15% or less.
(7) Flocculant Polyacrylamide (anionic type), polyaluminum chloride, epichlorohydrin (cationic flocculant), polyethyleneimine (cationic polymer), etc. are used. The flocculant also functions as an adhesive.
(8) Organic fiber Polyester, polypropylene, vinylon, cellulose (various pulp, waste paper), hemp (hemp, flax) are used. The addition rate is 10% or less as required.
(9) Others Silane coupling agents (bonding inorganic and organic strongly) and other coupling agents (titanate and aluminate) can also be used.

(Production method)
Heat-meltable heat-resistant inorganic fiber, heat expansion agent (heat-melting material, heat-absorbing agent), adhesive, organic fiber, etc. are dispersed in water to form a slurry, and floc is generated by adding flocculant to the slurry. A wet mat is formed by using a net-type or long-net type paper machine. After the dehydration, a plurality of wet mats are laminated and hot-pressed to obtain a thin plate-like fireproof shield material.

  In addition, in order to prevent the invasion of fire from the joint due to expansion and warping during a fire after construction, actual processing may be performed on the fireproof shield material, but in that case, a thickness of 5 mm or more is required. In order to improve the strength of the part, it is preferable to impregnate with an aqueous resin (epoxy emulsion, acrylic styrene emulsion, urethane emulsion).

  Therefore, in this embodiment, when the fireproof shield structure S is constructed on the outer wall of the building and the outer wall is exposed to a flame such as a fire, the front and back layers of the fireproof shield material 1 constituting the fireproof shield structure S 1a and 1b each exhibit a characteristic characteristic for a fireproof shield, and the fire resistance of the fireproof shield material is obtained by combining these different characteristics.

  For example, when one of the front and back layers 1a and 1b is a heat expansion layer (in the case of the above combination (A) or (C)), the heat expansion material in the heat expansion layer is heated and expands. Since this heat-expandable layer (one of the front and back layers 1a and 1b) has a stacked structure of heat-resistant inorganic fibers, expansion is induced in the thickness direction as the heat-expandable material expands. The fireproof shield material 1 itself expands in the thickness direction.

  In addition, since the fireproof shield structure S is formed by integrally laminating a total of two gypsum boards 5 and 5 (plate bodies) on the front and back surfaces of the fireproof shield material 1, the two gypsum boards 5 , 5 are pressed as the fireproof shield material 1 expands in the thickness direction, and expands in the thickness direction of the fireproof shield structure S. Due to the expansion of the fire shield material 1 itself and the gypsum boards 5 and 5 in the thickness direction, the fire shield structure S becomes a fire and heat resistant layer having a gap in the thickness direction, and heat conduction is performed by the fire and heat resistant layer. The fireproof shielding effect by the fireproof shield structure S can be obtained.

  On the other hand, when one of the front and back layers 1a, 1b is a flame prevention layer (in the case of the combination (A) or (B)), the heated molten material in the flame prevention layer is heated and melted to form a film, This molten film-like heat-melted material serves as a barrier layer to prevent the permeation of the flame and exerts the heat insulation ability.

  Furthermore, when one of the front and back layers 1a and 1b is a heat absorption layer (in the case of the combination (B) or (C)), the heat absorbing material contained in the heat absorption layer absorbs heat, so that the heat insulation ability Is demonstrated.

  If three types of functional materials (heat expansion material, heat melt material, heat absorption material) contained in each of these three layers are blended into the same wool mat at the same time to form a fireproof shield material with only one layer However, in order to demonstrate the heat insulation ability by the expansion of the heating expansion material, it is necessary to expand with good response to heating. Exhibiting the function of blocking the flow has a structure opposite to that of exhibiting the heat insulating ability due to the expansion of the heating expansion material. Further, suppressing the heat with a heat absorbing material that is another functional material also slows the response of the thermal expansion due to the heat expansion material. From these things, it becomes difficult to make the three types of functional materials compatible with only one layer of the fireproof shield material.

  On the other hand, in this embodiment, the role regarding the fireproof shield in the fireproof shield material 1 is shared by the front and back layers 1a and 1b, and the fire expansion material, the heat melting material, and the heat absorption material have a plurality of conflicting fire resistances. By providing the functions separately for each layer 1a, 1b, the respective effects are exhibited individually. The synergistic action of such effects can exhibit a remarkable fireproof shielding function that is not halfway.

  In any combination of the above, unlike the general fireproof expansion paint or sheet material, the fireproof shield material 1 creates a void having an effective structure of a floc laminated / entangled structure formed at the time of papermaking. Is expressed.

  Moreover, since the fireproof shield material 1 has a two-layer structure in which the front and back layers 1a and 1b are laminated and integrated, discontinuity occurs at the interface 1c existing between the two layers 1a and 1b. By this discontinuous interface 1c, when the refractory shield material 1 is heated, heat conduction is suppressed as a resistance at the interface 1c, and the refractory shield effect can be increased.

  In this embodiment, since the metal foil 7 is interposed between the fireproof shield material 1 and the gypsum board 5 (plate-like body) on the back side, the metal foil 7 serves as a heat reflecting layer in the fireproof shield structure S. Become. That is, the radiant heat from the heating source (flame such as fire) is reflected by the metal foil 7, and the fireproof shield effect of the fireproof shield structure S can be further enhanced.

  As a result, in this embodiment, due to such a remarkable fireproof shielding effect, a normal structure in which a plurality of gypsum boards having a large thickness are stacked, for example, a total thickness in which two gypsum boards having a thickness of 21 mm are stacked. The heat shield property and fire resistance equivalent to or better than the fire resistance performance of 42 mm can be achieved by the fire shield structure S having a smaller thickness (for example, a total thickness of 33 mm).

  Furthermore, since the fireproof shield material 1 of the fireproof shield structure S is formed by blending a heat expansion material with a wool mat in which heat-meltable heat-resistant inorganic fibers are stacked and entangled with each other, the heat-resistant shield material 1 is heated in the thickness direction. Even if it expands, the entanglement of the inorganic fibers is maintained as it is because the inorganic fibers are partially melted and become a molten state. The refractory shield material 1 is not collapsed by the entangled inorganic fibers, the scattering of the expansion material accompanying the collapse is prevented, and the refractory shield material 1 is stably retained as a heat insulating layer. In addition, since the fire-resistant shield material 1 is prevented from collapsing during heating due to the entanglement of the heat-resistant inorganic fibers as described above, expansion in the thickness direction is induced due to the stacked structure. However, as described above, if a sanitizing component is added, collapse during heating can be prevented more reliably.

(Embodiment 2)
FIG. 3 shows a fireproof shield material 1 according to Embodiment 2 of the present invention (in the following embodiments and modifications, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals and detailed description thereof) Is omitted).

  In this embodiment, the fireproof shield material 1 has a two-layer structure having front and back layers 1a and 1b having different compositions, as in the first embodiment, but at the interface 1c between the front and back layers 1a and 1b, A heat transfer suppressing material 2 for suppressing heat transfer is interposed. In order to interpose such a heat transfer suppression material 2 at the interface 1c, after forming a slurry and forming two wet mats, both wet mats are bonded together by a hot press or the like. The heat transfer suppressing material 2 may be sandwiched between the mats, and the wet mats are bonded to each other by a hot press or the like so that the heat transfer suppressing material 2 is interposed at the interface 1c between the front and back layers 1a and 1b. A fireproof shielding material 1 having a two-layer structure is formed.

  Examples of the heat transfer suppression material 2 include a heat melting material, a heat expansion material, and a heat absorption material. These heat-melting material, heat-expandable material, and heat-absorbing material all have a function of preventing heat from being conducted in the thickness direction to the fireproof shield material 1 during heating. Due to the interposition, heat transfer in the thickness direction is prevented by the fireproof shield material 1, and the heat blocking performance can be enhanced.

  Specifically, the heat-melting material is the same as the functional material included in the flame prevention layer, and is a material such as glass that melts by heating and prevents the permeation of the flame. If this heat-melted material is interposed in the interface 1c between the front and back layers 1a and 1b, when the refractory shield material is heated, the heat conduction in the thickness direction is blocked by the heat transfer suppressing material 2 of the interface 1c. Further, the fireproof shielding effect can be increased.

  Further, the heat-expandable material is a material such as expanded graphite or vermiculite that expands by heating, similar to the functional material blended in the heat-expandable layer. If such a heat-expandable material is interposed in the interface 1c between the front and back layers 1a and 1b, the heat-expandable material expands by heating to become a heat insulating layer, and the heat-expandable material (heat insulating layer) at the interface 1c provides a fireproof shield. The heat conduction in the thickness direction of the material 1 is prevented, and the fireproof shielding effect can also be increased.

  Furthermore, the heat absorbing material is the same as the functional material included in the heat absorbing layer, and is a material such as aluminum hydroxide that absorbs heat. If this heat absorbing material is interposed in the interface 1c between the front and back layers 1a and 1b, when the fireproof shield material 1 is heated, the heat conducted in the thickness direction of the fireproof shield material 1 is the heat of the interface 1c. Absorbed by the absorbent material, this can increase the fire shield effect.

  In that case, it is desirable that the heat transfer suppression material 2 has a function different from that of the functional material blended in the front and back layers 1a and 1b adjacent to both sides of the interface 1c in the fireproof shield material 1, respectively. For example, in the case of the combination (A) in which one of the heating expansion layer and the flame prevention layer is the surface layer 1a and the other is the back layer 1b, the heating expansion material (functional material) contained in the heating expansion layer and the flame prevention layer A heat absorbing material having a function different from any of the included hot melt material (functional material) is interposed as the heat transfer suppressing material 2 at the interface 1c.

  If it does in this way, the function of the heat transfer suppression material 2 (in the above example, the heat absorption material) interposed in the interface 1c is blended with the front and back layers 1a and 1b adjacent to both sides of the interface 1c ( In the above example, it is different from the heat expansion material and the heat melting material), so that three different types of fireproof shields are provided by the two layers 1a and 1b on the front and back sides and the heat transfer suppression material 2 on the interface 1c between the layers 1a and 1b. There is an advantage that the function can be exhibited and the fireproof shielding effect can be further increased.

  FIG. 4 shows a modification of the fireproof shield structure S. In this example, another new fire-resistant shield material 1 is laminated instead of the front-side gypsum board 5 in the fire-resistant shield structure S shown in FIG. 2, and the front-side fire shield material 1 is the back-side fire-resistant shield material 1. It has the same composition and thickness as the material 1 (for example, 6 mm). That is, the fireproof shield structure S of this embodiment is obtained by laminating two fireproof shield materials 1 and 1 and laminating one gypsum board 5 on the back side, and the total thickness is 27 mm, for example. Become. Each fireproof shield material 1 has the configuration of the first or second embodiment.

  Other configurations are the same as those of the fireproof shield structure S shown in FIG. Therefore, the same effect as in this example can be obtained.

(Other embodiments)
In the above embodiment, the fireproof shield material 1 has a two-layer structure of front and back layers 1a and 1b. However, the fireproof shield material 1 has a multilayer structure of three or more layers in which one or more intermediate layers are added between the front and back layers 1a and 1b. You can also. In that case, it is only necessary that three of the heating expansion layer, the flame prevention layer, and the heat absorption layer are laminated in a thickness direction to be a plurality of layers, and an interface 1c is formed between adjacent layers. The arrangement of these layers can be appropriately selected as necessary. By doing so, the same operation effect as the above-mentioned embodiment can be produced. Further, if a heat transfer suppression material is interposed at the interface between adjacent layers, the same effects as those of the second embodiment can be obtained.

  Moreover, in the said embodiment, although the gypsum board 5 is used as a plate-shaped object laminated | stacked integrally on the fireproof shield material 1 in the fireproof shield structure S, it replaces with this gypsum board 5 and a calcium silicate board may be used. Well, you may use both the gypsum board 5 and the calcium silicate board.

  Further, in the fireproof shield structure S, the number of fireproof shield materials 1 and gypsum board 5 (calcal board) can be changed as necessary. However, in the point that the total thickness of the fireproof shield structure S can be reduced, Thus, it is preferable to use one or two fireproof shield materials 1 and gypsum board 5 as described above.

  Further, the metal foil 7 interposed between the fireproof shield material 1 and the gypsum board 5 is not essential, but a heat reflecting layer can be formed in the fireproof shield structure S to enhance the fireproof shield effect of the fireproof shield structure S. It is preferable to provide it in terms of points.

  Next, a specific example will be described. The fireproof shield structure with a total thickness of 33 mm (see FIG. 2) having the configuration of the first embodiment is referred to as Example 1, and the fireproof shield structure with a thickness of 27 mm (see FIG. 3) having the configuration of the second embodiment is taken as an example. Each test piece was prepared as 2.

  Further, in Comparative Example 1, two volcanic vitreous multilayer boards having a thickness of 12.5 mm (for example, trade name “Dailite” manufactured by Daiken Kogyo Co., Ltd.) are formed on the surface side of one gypsum board having a thickness of 15 mm. ]) In a stacked structure (total thickness 40 mm).

  Furthermore, the comparative example 2 changes the thickness of the gypsum board into 12 mm in the comparative example 1 (total thickness 37 mm).

  These examples and comparative examples were subjected to simple fire resistance tests and small furnace tests as needed. In the simple fire resistance test, a flame of a burner having a constant temperature of 1200 ° C. to 1300 ° C. was applied from the front surface to the fire resistant shield structure (test piece), and the temperature of the back surface was measured. In the small furnace test, a test piece with a fireproof shield structure is attached to the back side wall of a closed box fireproof furnace so that the surface faces the fireproof furnace, and the test piece (fireproof shield structure) of the fireproof furnace is installed. The temperature of the back surface was measured by applying a flame of a burner to the surface with a temperature rising curve specified by ISO. Both are useful to get an overview of whether you can pass a formal exam.

  In all the tests, the heating time was set to 1 hour, and after 1 hour, the fire was extinguished and the burning of the burner was stopped, and the temperature during that time was measured. The change in the measured temperature is shown in FIG.

  When the measurement result of FIG. 5 is seen, the temperature rise is less than 120 ° C. except for Comparative Example 2. From this, for example, when the fireproof shield standard that “the temperature of the back surface of the test piece after 1 hour from the heating is air temperature + 180 ° C. or less” is set, all except for Comparative Example 2 satisfy the standard. Yes.

  And while the total thickness of Comparative Example 1 is 40 mm and the total thickness of Comparative Example 2 is 37 mm, Examples 1 and 2 have a total thickness of 27 to 33 mm, both of which are thinner than the Comparative Example. Yes. From this, in the fireproof shield structure provided with the fireproof shield material of the present invention, heat insulation and fire resistance equal to or better than the structure in which a plurality of thick gypsum boards are stacked can be achieved by a thinner thickness. Is clear.

  INDUSTRIAL APPLICABILITY The present invention can achieve heat insulation and fire resistance equivalent to or better than a structure in which a plurality of thick gypsum boards are stacked, and a structure with a thinner thickness, and is extremely useful in the field of fire shield structures. It becomes.

S Fireproof shield structure 1 Fireproof shield material 1a Surface layer 1b Back layer 1c Interface 2 Functional material 5 Gypsum board (plate-like body)
7 Metal foil

Claims (7)

A heat-expandable layer in which heat-expandable heat-resistant inorganic fibers are stacked and entangled with each other, and a heat-expandable material that is expanded by heating is blended as a functional material,
A flame prevention layer in which a heat melting material that melts by heating and prevents transmission of flame is blended as a functional material in the wool mat,
Of the heat absorbing layer in which the heat absorbing material that absorbs heat is blended as a functional material on the wool mat, at least two layers are laminated in the thickness direction to form a plurality of layers that are consolidated. Fireproof shield material. In claim 1,
A fireproof shielding material characterized in that a heat transfer suppressing material is interposed at an interface between a plurality of layers. In claim 2,
The heat transfer suppressing material has a function different from that of the functional material blended in the layers adjacent to both sides of the interface. In claim 2 or 3,
The heat transfer suppressing material is a heat-melting shielding material that is melted by heating and prevents the permeation of a flame. In claim 2 or 3,
The heat-transfer suppressing material is a heat-expandable material that expands by heating. In claim 2 or 3,
A heat-shielding material, wherein the heat transfer suppression material is a heat-absorbing material. A fireproof shield material according to any one of claims 1 to 6,
A fireproof shield structure, comprising: a platy body made of at least one of a gypsum board and a calcium plate integrally laminated on at least one of the front and back surfaces of the fireproof shield material.

Images