Refractory cladding

Abstract

To provide a fire resistive covering body with high fire resistance.SOLUTION: A fire resistive covering body 1 with fire resistance is attached so as to cover an indoor side of a mullion 110 partitioning both sides of outer wall panels 120, 120, being provided with: hydroxide aluminum paper 10 provided on the indoor side of the mullion 110 and generating water by being heated by hydroxide aluminum as a main component; and a heat insulation sheet 20 provided on an indoor side of the hydroxide aluminum paper 10 and placed over the outer wall panels 120, 120 placed on both sides.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a fire-resistant coating.

Background Art

[0002] Conventionally, in the spandrel part of a curtain wall, in order to enhance the fire resistance of the mullion, a fire-resistant structure in which the indoor side of the mullion is covered with a mat-like rock wool is known (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the fire-resistant structure of Patent Document 1, there is a risk that heat from an outdoor fire is transmitted indoors through the mullion and the rock wool.

[0005] Therefore, an object of the present invention is to provide a fire-resistant coating with high fire resistance.

Means for Solving the Problems

[0006] As means for solving the above problems, the present invention is a fire-resistant coating that is attached so as to cover a structural member extending in the vertical or horizontal direction and has fire resistance, and is disposed on the indoor side of the structural member, and a metal hydroxide to component that generates water when heated multiple a metal hydroxide sheet, and a heat insulating sheet disposed on the indoor side of the metal hydroxide sheet and having heat insulating properties multiple and A water-retaining film that covers the aforementioned heat-insulating sheet and retains the water generated by the metal hydroxide sheet with the metal hydroxide sheet, is provided with The metal hydroxide sheet, the heat insulating sheet, the metal hydroxide sheet, the heat insulating sheet, and the water-retaining film are laminated in that order from the structural member toward the interior side. It is characterized by being a fire-resistant coating.

[0007] With this configuration, since the metal hydroxide sheet is placed on the interior side of the structural member, if the structural member is heated by, for example, an outdoor (external) fire, the heat from the structural member will heat the metal hydroxide sheet, and water will be generated. While water is being generated in this way, the structural member, metal hydroxide sheet, and insulation sheet will not heat up easily, and heat will not easily be transferred to the interior side through the insulation sheet, thus increasing fire resistance.

[0009] With this configuration, the metal hydroxide sheet covering the insulation sheet retains the water generated by the metal hydroxide sheet. As a result, the metal hydroxide sheet and the insulation sheet do not heat up easily, heat is less likely to be transferred to the interior through the insulation sheet, and fire resistance is increased.

[0010] Furthermore, the water-retaining film may be in the form of a bag that encloses the metal hydroxide sheet and the heat-insulating sheet.

[0011] With this configuration, the bag-shaped water-retaining film encloses the metal hydroxide sheet and the heat-insulating sheet; in other words, the water-retaining film packages the metal hydroxide sheet and the heat-insulating sheet, making it easier to retain water and to handle the fire-resistant coating.

[0012] Furthermore, the heat insulating sheet may also have a configuration that includes a metal hydroxide. Furthermore, the heat insulating sheet may have a cushioning property.

[0013] With this configuration, even if the interior side surface of the structural member is uneven, the cushioning insulation sheet deforms to accommodate this unevenness and can adhere tightly without gaps. This tightly adhering insulation sheet provides good insulation and enhances fire resistance.

[0014] The present invention also relates to a fire-resistant coating body that is attached so as to cover the indoor side of an outer wall panel and has fire resistance. The fire-resistant coating body includes a heat-insulating layer that is disposed on the indoor side of the outer wall panel and is formed by butt-jointing and arranging a plurality of heat-insulating sheets, and a metal hydroxide sheet that is disposed on the room side of the butt-joint portion of the plurality of heat-insulating sheets and contains a metal hydroxide as a main component and generates water when heated.

Advantages of the Invention

[0015] According to the present invention, a fire-resistant coating body with high fire resistance is provided.

Brief Description of the Drawings

[0016] [Figure 1] It is a perspective view of the fire-resistant coating body and the outer wall structure according to the present embodiment. [Figure 2] It is a plan sectional view of the fire-resistant coating body according to the present embodiment. [Figure 3] It is a plan sectional view after the fire-resistant coating body and the outer wall structure according to the present embodiment are installed.

Modes for Carrying Out the Invention

[0017] An embodiment of the present invention will be described with reference to FIGS. 1 to 3.

[0018] ≪Configuration of the Outer Wall Structure≫ In the present embodiment, a configuration in which the outer wall structure 100 is applied to the spandrel panel portion of a metal curtain wall is exemplified. The outer wall structure 100 includes a vertical mullion 110 (structural member) extending in the vertical direction, two outer wall panels 120, 120 (spandrel panels), and fire-resistant coating bodies 200 respectively disposed on the indoor side of each outer wall panel 120.

[0019] <Mullion> The upright 110 is a partition member (marion) that partitions the outer wall panels 120, 120 arranged on both the left and right sides. The upright 110 is, for example, an extruded profile made of an aluminum alloy presenting a square tube shape and is supported by a floor slab (not shown) via fittings (not shown).

[0020] <Outer wall panel> The outer wall panel 120 is, for example, a plate-like member made of an aluminum alloy (metal). However, the outer wall panel 120 may also be configured to be made of wood. On the side of the outer wall panel 120 facing the upright 110, a flange portion 121 extending toward the indoor side is formed. The flange portion 121 is fastened and fixed to the upright 110 with bolts (not shown).

[0021] <Fire-resistant coating> The fire-resistant coating 200 is a coating (structure) that is attached to cover the indoor side of the outer wall panel 120 and has fire resistance, and includes a first heat-insulating layer 211 and a second heat-insulating layer 212, aluminum hydroxide paper 220 (metal hydroxide sheet), and a water-retaining film 230. The fire-resistant coating 200 is fixed to the back surface (indoor side surface) of the outer wall panel 120 by, for example, welding pins 301 penetrating in the thickness direction.

[0022] <First heat-insulating layer, second heat-insulating layer> The first heat-insulating layer 211 and the second heat-insulating layer 212 are arranged in this order from the outdoor side toward the indoor side. That is, the fire-resistant coating 200 has a two-layer structure of heat-insulating layers.

[0023] The first heat-insulating layer 211 is formed by arranging heat-insulating sheets 211A, 211A having heat-insulating properties and cushioning properties side by side in the plane direction. The heat-insulating sheet 211A is, for example, a blanket (cushioning material, cushioning sheet) made of rock wool. Between the adjacent heat-insulating sheets 211A, 211A in the plane direction, a joint portion 211B (butting portion) formed by butting the heat-insulating sheets 211A, 211A is formed.

[0024] The second insulation layer 212, like the first insulation layer 211, is constructed by arranging insulation sheets 212A, 212A having both insulation and cushioning properties in a planar direction. A joint 212B (butt joint) is formed between adjacent insulation sheets 212A, 212A in the planar direction. Here, the insulation sheets 211A and 212A may contain multiple small pieces or granules of aluminum hydroxide paper 220 to make them less susceptible to temperature rise.

[0025] <Aluminum hydroxide paper> The aluminum hydroxide paper 220 is a sheet whose main component is aluminum hydroxide (Al2(OH)3, a metal hydroxide), and which generates water when heated. The aluminum hydroxide paper 220 is placed on the interior side of the joint 211B of the first insulation layer 211, and also spans the adjacent insulation sheets 211A, 211A on both sides of the joint 211B. However, the aluminum hydroxide paper may also be provided on the interior side of the joint 212B.

[0026] As a result, for example, if the exterior wall panel 120 expands due to an outdoor fire and the exterior wall panel 120 bends outward, causing the joint 211B to open, and even if the heat from the fire penetrates through the open joint 211B, this heat will be less likely to be transferred to the interior side by the aluminum hydroxide paper 220. In other words, when the aluminum hydroxide paper 220 is heated and its temperature rises, it generates water (see equation (1)), and while this water is being generated, the aluminum hydroxide paper 220, the first insulation layer 211, and the second insulation layer 212 become less likely to rise further in temperature, making it more difficult for heat to be transferred to the interior side and increasing fire resistance.

[0027] 2Al(OH)3 → Al2O3 + 3H2O …(1)

[0028] <Water-retaining film> The water-retaining film 230 covers the interior side of the second insulation layer 212, retaining the water generated by the aluminum hydroxide paper 220 and preventing it from entering the interior. The water-retaining film 230 is made of, for example, aluminum foil. However, the water-retaining film 230 may also be made of, for example, a flame-retardant synthetic resin (such as polyimide).

[0029] <<Composition of fire-resistant coatings>> The fire-resistant covering 1 is a long, slender rectangular prism shape extending generally vertically (see Figure 1), and is installed to cover the indoor side of the mullion 110, providing fire resistance. The fire-resistant covering 1 comprises two sheets of aluminum hydroxide paper 10, two sheets of insulation sheet 20, and a water-retaining bag 30 (water-retaining film).

[0030] From the exterior side towards the interior side, aluminum hydroxide paper 10, insulation sheet 20, aluminum hydroxide paper 10, and insulation sheet 20 are layered in that order. The entire layered structure is then wrapped in a water-retaining bag 30, and the wrapped structure is fixed to the back side (interior side) of the exterior wall panel 120 with welding pins 302.

[0031] <Aluminum hydroxide paper> The aluminum hydroxide paper 10, like the aluminum hydroxide paper 220 described above, is a sheet whose main component is a metal hydroxide and which generates water when heated (see formula (1)). The aluminum hydroxide paper 10 is placed on the indoor side of the mullion 110 and is a sheet that covers the entire indoor side surface 111 of the mullion 110.

[0032] In the width direction, the length L10 of the aluminum hydroxide paper 10 is longer than the length L110 of the mullion 110 (L10 > L110). As a result, the aluminum hydroxide paper 10 covers the entire interior side surface 111 of the mullion 110. That is, both ends 11, 11 of the aluminum hydroxide paper 10 in the width direction cover the water-retaining films 230 on both sides of the mullion 110. Here, the length L10 of the aluminum hydroxide paper 10 may be greater than or equal to the length L110 of the mullion 110 (L10 ≥ L110).

[0033] Since the aluminum hydroxide paper 10 is thin, it can be easily deformed. As a result, even if the indoor side surface 111 of the mullion 110 and the water-retaining film 230 are not flush, the aluminum hydroxide paper 10 conforms well to the deformation and adheres tightly to the indoor side surface 111 and the water-retaining film 230 without any gaps.

[0034] <Insulation sheet> The insulation sheet 20, like the insulation sheets 211A and 212A described above, has both thermal insulation and cushioning properties, and is, for example, a blanket made of rock wool. Because the insulation sheet 20 has thermal insulation properties, heat from the mullions 110 is less likely to be transferred to the interior. Here, the insulation sheet 20 may also be configured to contain multiple small pieces or granules of aluminum hydroxide paper 10, making it less likely to heat up.

[0035] In the width direction, the length L20 of the insulation sheet 20 is approximately equal to the length L10 of the aluminum hydroxide paper 10, that is, it is longer than the length L110 of the mullion 110 (L20 > L110). The insulation sheet 20 covers the entire interior side surface 111 of the mullion 110 and the ends 231, 231 of the water-retaining film 230 on the mullion 110 side on both sides.

[0036] In other words, the insulation sheet 20 is positioned so as to straddle the exterior wall panels 120, 120 on both sides of the mullion 110 in the width direction. In this way, since the insulation sheet 20, which has thermal insulation properties, is positioned so as to straddle the exterior wall panels 120, 120 on both sides of the mullion 110, heat from the mullion 110 and the exterior wall panels 120 is less likely to be transferred to the interior side.

[0037] Because the insulation sheet 20 has cushioning properties, it deforms to conform to the unevenness of the interior side surface 111 of the mullion 110 and the water-retaining film 230, ensuring a tight, gap-free fit (see Figure 3). As the gaps are minimized in this way, the insulation sheet 20 provides excellent insulation and improves fire resistance.

[0038] <Water holding bag> The water-retaining bag 30 is a bag that encloses two sheets of aluminum hydroxide paper 10, 10 and insulation sheets 20, 20. Similar to the water-retaining film 230, it retains the water generated by the aluminum hydroxide paper 10, 10 and prevents it from entering the room. The water-retaining bag 30 is made of, for example, aluminum foil. However, the water-retaining bag 30 may also be made of, for example, a flame-retardant synthetic resin (such as polyimide).

[0039] In this way, the water-retaining bag 30 encloses and packages the aluminum hydroxide paper 10 and the insulation sheet 20, so that the water is further retained within the fire-resistant covering 1 by the aluminum hydroxide paper 10, while further preventing water from entering the room (and leaking out to the outside), and making the fire-resistant covering 1 easier to handle.

[0040] ≪Effects and Effects of Fire-Resistant Coatings≫ One effect of the fire-resistant coating 1 according to this embodiment will be explained. Since the aluminum hydroxide paper 10 is placed on the interior side of the mullion 110, if the mullion 110 is heated by an outdoor (external) fire, the heat from the mullion 110 heats the aluminum hydroxide paper 10, generating water. While water is being generated in this way, the mullion 110, the aluminum hydroxide paper 10, and the insulation material become less likely to heat up, making it difficult for heat to be transferred to the interior side through the insulation sheet 20, thus increasing fire resistance.

[0041] Since the insulating sheet 20, which has heat-insulating properties, is positioned to straddle the exterior wall panels 120 on both sides of the mullion 110, heat from the mullion 110 and the exterior wall panels 120 is less likely to be transferred to the interior.

[0042] ≪Variations≫ Although one embodiment of the present invention has been described above, the present invention is not limited thereto and may be modified as follows, for example.

[0043] In the above-described embodiment, the fire-resistant coating 1 is provided with two sheets of aluminum hydroxide paper 10, 10 and two sheets of heat insulating sheet 20, 20, that is, a configuration with two layers of fire-resistant layers consisting of aluminum hydroxide paper 10 and heat insulating sheet 20 was illustrated. However, other configurations, such as one or three or more layers of fire-resistant layers, are also possible. Here, if the number of aluminum hydroxide paper 10 increases, the fire-resistant coating 1 will not heat up easily.

[0044] In the above-described embodiment, the metal hydroxide sheet was exemplified as aluminum hydroxide paper 10 mainly composed of aluminum hydroxide, but it may also be a sheet mainly composed of other metal hydroxides (magnesium hydroxide, iron hydroxide, etc.). The same applies to aluminum hydroxide paper 220.

[0045] In the above-described embodiment, the structural member (partition member) is an example of a configuration in which the structural member (partition member) is an aluminum alloy mullion that constitutes a metal curtain wall constructed using the knockdown method. However, other configurations are also possible, for example, in which the structural member is a unit (vertical member) that extends vertically and is constructed using the unit method. Alternatively, the structural member may be made of wood.

[0046] In the above-described embodiment, a configuration in which the structural member (partition member) is a mullion extending in the vertical direction was illustrated, but other configurations, such as a horizontal member (transom, horizontal bar member) extending in the horizontal direction, are also possible. In this case, the fire-resistant covering 1 is installed so as to straddle the horizontal member in the vertical direction.

[0047] In the above-described embodiment, the water-retaining film is shown as a bag-shaped water-retaining bag 30, but other configurations are also possible, for example, in which the water-retaining film is in the form of a sheet and covers the indoor side surface of the aluminum hydroxide paper 10 or the indoor insulation sheet 20.

[0048] In the above-described embodiment, the fire-resistant coating 200 was exemplified as having two insulation layers (first insulation layer 211, second insulation layer 212), but other configurations such as a single-layer structure or a three-layer or more-layer structure may also be used.

[0049] In the above-described embodiment, a configuration in which the structural member is a mullion 110 constituting the exterior wall structure 100 was illustrated. However, other configurations are also possible, for example, in which the structural member is a wooden column placed in the center of a wooden house constructed using a post-and-beam method. In this case, the wooden column may be wrapped with a fire-resistant covering 1. Alternatively, the structural member may be a metal column placed in the center of a building such as a skyscraper. It goes without saying that such configurations are within the technical scope. [Explanation of symbols]

[0050] 1 Fireproof covering 10. Aluminum hydroxide paper (metal hydroxide sheet) 20 Insulation Sheets 30 Water-retaining bags (water-retaining films) 100 Exterior wall structure 110 Mullion (structural member) 120 exterior wall panels 200 Fireproof coating

Claims

1. A fire-resistant covering that is attached to cover a structural member extending vertically or horizontally and has fire-resistant properties, The structural member is arranged on the indoor side and comprises multiple metal hydroxide sheets that contain metal hydroxides and generate water when heated, Multiple insulating sheets having insulating properties are arranged on the indoor side of the aforementioned metal hydroxide sheet, A water-retaining film that covers the aforementioned heat-insulating sheet and retains the water generated by the metal hydroxide sheet with the metal hydroxide sheet, Equipped with, The layers are stacked in the following order from the structural member toward the interior: the metal hydroxide sheet, the heat insulating sheet, the metal hydroxide sheet, the heat insulating sheet, and the water-retaining film. A fire-resistant coating characterized by the following features.

2. The water-retaining film is bag-shaped and encloses the plurality of metal hydroxide sheets and the plurality of heat insulating sheets. The fire-resistant coating according to feature 1.

3. A fire-resistant covering that is installed to cover the interior side of an exterior wall panel and has fire resistance, An insulating layer is placed on the interior side of the aforementioned exterior wall panel and is formed by arranging multiple insulating sheets side by side, A metal hydroxide sheet is placed on the room side of the joint between the multiple insulation sheets, and is composed of metal hydroxides that generate water when heated. Equipped with A fire-resistant coating characterized by the following features.

4. The heat insulating sheet comprises a metal hydroxide A fire-resistant coating according to any one of claims 1 to 3.

5. The aforementioned heat insulating sheet has cushioning properties. A fire-resistant coating according to any one of claims 1 to 3.

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