Wall material and glass curtain wall

Abstract

Provided are a wall material and a curtain wall which are less apt to increase in temperature upon exposure to heat and are inhibited from being warped by a temperature increase.　A wall material according to the present invention includes a refractory layer and an aluminum composite layer disposed on at least one surface of the refractory layer, wherein the aluminum composite layer comprises an aluminum layer and a decorative layer and the refractory layer is not a volcanic vitreous multilayer board. A wall material according to the present invention includes a refractory layer and an aluminum composite layer disposed on at least one surface of the refractory layer, wherein the aluminum composite layer comprises an aluminum layer and a decorative layer and the refractory layer is a calcium silicate board, a rock wool board, a plaster board, an ALC board, or a cement board.

Description

Wall materials and glass curtain walls

[0001] The present invention relates to a wall material and a glass curtain wall.

[0002] Glass curtain walls have traditionally been formed on each floor of a building or other structure by providing fire-resistant material on the backside (i.e., the interior side) of the glass in the spandrel section in order to prevent the spread of fire.

[0003] For example, Patent Document 1 proposes a curtain wall having a fire-resistant and heat-insulating layer on the backside of a metal wall panel, the layer being made of a hardened composition containing cement, expanded organic resin particles, inorganic lightweight particles, and a predetermined amount of a heat-absorbing substance. This curtain wall is said to have excellent fire resistance and heat insulation properties, a desired strength, and also to be able to suppress the occurrence of condensation.

[0004] JP 2011-190584 A

[0005] However, conventional fire-resistant materials for curtain walls are prone to temperature rise due to heat and warpage due to temperature rise. In addition, condensation is likely to occur due to the moisture contained in the fire-resistant material itself and indoor humidity passing through the fire-resistant material, making it difficult to prevent condensation, especially in winter. From this perspective, there has been a strong demand for a wall material that is less likely to temperature rise due to heat from a fire or the like, is less likely to warp, and can be suitably used as a fire-resistant material for curtain walls.

[0006] The present invention has been made in view of the above, and aims to provide a wall material and curtain wall that are less likely to experience temperature increases due to heat and that are also suppressed from warping due to temperature increases.

[0007] As a result of extensive research into achieving the above-mentioned object, the inventors have discovered that the above-mentioned object can be achieved by using a specific fire-resistant layer and a specific aluminum composite layer as essential components, and have thus completed the present invention.

[0008] That is, the present invention encompasses, for example, the subject matter described in the following items. Item 1: A wall material comprising a fire-resistant layer and an aluminum composite layer provided on at least one side of the fire-resistant layer, wherein the aluminum composite layer contains an aluminum layer and a decorative layer, and the fire-resistant layer is excluding a volcanic vitreous multi-ply board. Item 2: A wall material comprising a fire-resistant layer and an aluminum composite layer provided on at least one side of the fire-resistant layer, wherein the aluminum composite layer contains an aluminum layer and a decorative layer, and the fire-resistant layer is a calcium silicate board, gypsum board, rock wool board, ALC board, or cement board. Item 3: The wall material according to Item 1 or 2, in which the fire-resistant layer, the aluminum layer, and the decorative layer are laminated in this order. Item 4: The wall material according to any one of Items 1 to 3, in which the aluminum composite layer and the fire-resistant layer are bonded by an adhesive layer. Item 5: The wall material according to any one of Items 1 to 4, in which the decorative layer contains pulp paper. Item 6: The wall material according to any one of Items 1 to 5, wherein the aluminum layer has a thickness of 10 nm or more. Item 7: The wall material according to any one of Items 1 to 6, which is for use in a glass curtain wall. Item 7': A wall material for a glass curtain wall, comprising the wall material according to any one of Items 1 to 6. Item 8: A glass curtain wall, comprising the wall material according to Item 7.

[0009] The wall material of the present invention is less susceptible to temperature rise due to heat, and warping due to temperature rise is also suppressed.

[0010] 1 is a schematic diagram showing an example of an embodiment of a wall material of the present invention, and is a cross-sectional view for schematically explaining the structure thereof. FIG. 2 is a schematic diagram showing a test device used in an indoor heating test and an outdoor heating test.

[0011]

[0023] In the present specification, the terms "contain" and "comprise" include the concepts of "contain," "comprise," "consist essentially of," and "consist only of."

[0012] 1. Wall Material One embodiment of the wall material of the present invention comprises a fire-resistant layer and an aluminum composite layer provided on at least one side of the fire-resistant layer, the aluminum composite layer containing an aluminum layer and a decorative layer, and the fire-resistant layer is excluding a volcanic vitreous multi-layer plate.

[0013] Another embodiment of the wall material of the present invention comprises a fire-resistant layer and an aluminum composite layer provided on at least one surface of the fire-resistant layer, the aluminum composite layer containing an aluminum layer and a decorative layer, and the fire-resistant layer is a calcium silicate board, gypsum board, rock wool board, ALC board, or cement board.

[0014] That is, the wall material of the present invention comprises a fire-resistant layer and an aluminum composite layer provided on at least one side of the fire-resistant layer, the aluminum composite layer containing an aluminum layer and a decorative layer, and the fire-resistant layer is made of a material other than a volcanic vitreous multi-ply board, or is a calcium silicate board, gypsum board, rock wool board, ALC board, or cement board.

[0015] The wall material of the present invention is resistant to temperature rise due to heat and also suppresses warping due to temperature rise. Furthermore, when applied to glass curtain walls, the wall material of the present invention can suppress the occurrence of condensation on the glass surface, and is lightweight, can be installed using a simple method, and is easy to process. Therefore, the wall material of the present invention can be suitably used for curtain walls of buildings, etc., and can be used to install curtain walls that are easy to suppress the occurrence of condensation.

[0016] Fig. 1 is a schematic diagram showing an example of an embodiment of a wall material of the present invention, and is a cross-sectional view for schematically explaining the structure. The wall material according to the embodiment of Fig. 1 is referred to as wall material A.

[0017] The wall material A is formed including a laminate including a fire-resistant layer 1 and an aluminum composite layer 2. In the embodiment of Fig. 1, the aluminum composite layer 2 includes an aluminum layer 2a and a decorative layer 2c. In the wall material A shown in Fig. 1, the fire-resistant layer 1 and the aluminum composite layer 2 are bonded together by an adhesive layer 4.

[0018] The fire-resistant layer 1 is a base material of the wall material and is a component that allows the wall material to exhibit fire resistance. The fire-resistant layer 1 is made of a material other than a volcanic vitreous multi-layer board, or is a calcium silicate board, gypsum board, rock wool board, ALC board, or cement board.

[0019] The volcanic glass multilayer board is different from calcium silicate board, gypsum board, rock wool board, ALC board, and cement board. The volcanic glass multilayer board is a product made by combining particles of volcanic glass deposits (shirasu balloons, white clay, pumice, etc.) and their foams, inorganic fibers (rock wool, glass wool), and inorganic powders (fly ash, calcium carbonate, etc.), and molding them into layers with an organic binder, and examples of such products include the multilayer board specified in the Japanese Industrial Standards (JIS A 5440) and Daiken Kogyosha's "Dailite."

[0020] The type of calcium silicate board that can be used in the fire-resistant layer is not particularly limited, and a wide range of known calcium silicate boards can be used. For example, calcium silicate boards can include wollastonite, xonotlite, tobermorite, calcium carbonate, etc. Cement boards that can be used in the fire-resistant layer include known lightweight cement boards, and a specific example of a lightweight cement board is a hardened product of a mixture containing alumina cement, a material containing silicon oxide, and water. An example of such a lightweight cement board is the fire-resistant material disclosed in JP 2021-161016 A. The types of gypsum boards, rock wool boards, ALC boards, and cement boards that can be used in the fire-resistant layer are also not particularly limited.

[0021] JP 2021-161016 A discloses a lightweight cement board, specifically a hardened product obtained by hardening a mixture containing alumina cement, a material containing silicon oxide, and water. The type of alumina cement is not particularly limited, and a wide range of known alumina cements can be used. For example, alumina cements used in the civil engineering or construction fields can be widely used. The alumina cement used to form the hardened product can be obtained, for example, from commercially available products, or can be obtained by known manufacturing methods.

[0022] The material containing silicon oxide is a raw material for forming a cured product. The material containing silicon oxide is not particularly limited as long as it contains silicon oxide, and examples thereof include materials used in the civil engineering or construction fields. Examples of silicon oxide include silicon dioxide. The material containing silicon oxide is preferably at least one selected from the group consisting of blast furnace slag, pozzolan, and slag wool. In this case, the reaction with alumina cement is likely to produce stratlingite, which has excellent endothermic properties, and as a result, the temperature of the refractory material is less likely to rise, and fire resistance is likely to be improved.

[0023] The type of blast furnace slag is not particularly limited, and examples thereof include a wide range of blast furnace slags used in the fields of civil engineering and construction. Known examples of blast furnace slag include slowly cooled blast furnace slag and granulated blast furnace slag. Among these, granulated blast furnace slag is preferred because it is likely to produce stratlingite, which has excellent endothermic properties, by reacting with alumina cement, thereby making it less likely for the temperature of the refractory material to rise and further improving its fire resistance. Blast furnace slag can be obtained, for example, from commercially available products, or can be obtained by known production methods.

[0024] The type of pozzolan is not particularly limited, and examples thereof include a wide range of materials used in the fields of civil engineering or architecture. Specific examples of pozzolans include silica fume, fly ash, metakaolin, and cement (e.g., ordinary Portland cement, high-early-strength cement, blast-furnace cement, etc.). Among these, ordinary Portland cement and blast-furnace cement are preferred pozzolans, as they are less likely to cause a rise in the temperature of the refractory material and are more likely to improve fire resistance. Pozzolans can be obtained, for example, from commercially available products, or can be obtained by known manufacturing methods. The type of slag wool is not particularly limited, and examples thereof include a wide range of materials used in the fields of civil engineering or architecture.

[0025] The material containing an oxide of silicon may be used alone or in combination of two or more kinds.

[0026] The material containing silicon oxide is particularly preferably one or more selected from the group consisting of blast furnace slag (particularly granulated blast furnace slag), blast furnace cement, and ordinary Portland cement, in that stratlingite is easily formed, the temperature of the refractory material is less likely to rise, and the fire resistance is more likely to be improved.

[0027] Lightweight cement boards can be formed by curing a mixture containing the alumina cement, at least one material containing an oxide of silicon, and water. Such a mixture can contain additives other than the alumina cement and the material containing an oxide of silicon. For example, the mixture can further contain at least one material selected from the group consisting of a heat-resistance-imparting inorganic material and a reinforcing fiber in addition to the alumina cement and the oxide of silicon. Examples of heat-resistance-imparting inorganic materials include wollastonite, calcium silicate hydrate, calcium carbonate, talc, sepiolite, mica, shirasu, shirasu balloons, vermiculite, perlite, silicon carbide, silicon nitride, aluminum nitride, boron nitride, aluminum titanate, alumina, mullite, spinel, zircon, zirconia, magnesia, petalite, and fused silica.

[0028] In the present invention, when the fire-resistant layer does not contain a volcanic vitreous multi-layer board, the fire-resistant layer can be formed of, for example, a calcium silicate board, a gypsum board, an ALC board, a cement board, or a rock wool board.

[0029] In the present invention, examples of the fire-resistant layer include "Ecolux" manufactured by Nichias Corporation and "Taicalite" manufactured by Nippon Insulation Co., Ltd.

[0030] As described above, by using a material other than a volcanic glass multi-layer board for the fire-resistant layer, or by using a calcium silicate board, gypsum board, rock wool board, ALC board, or cement board for the fire-resistant layer, the wall material of the present invention is less likely to experience a temperature rise due to heat, and warping due to a temperature rise is also suppressed.

[0031] It is particularly preferable that the fire-resistant layer is a lightweight cement board as disclosed in JP 2021-161016 A. As a result, the wall material of the present invention is particularly resistant to temperature rise due to heat, and warping due to temperature rise is further suppressed, making it particularly suitable for curtain walls.

[0032] As shown in FIG. 1, the aluminum composite layer is a layer including an aluminum layer and a decorative layer.

[0033] The aluminum layer is preferably, for example, an aluminum foil, an aluminum vapor deposition film, etc., and more preferably an aluminum foil. The type of aluminum foil is not particularly limited, and for example, known aluminum foils used for building materials can be widely applied.

[0034] The thickness of the aluminum layer is preferably, for example, 10 nm or more. In this case, when the wall material A is applied to a curtain wall, temperature rise due to heat is less likely to occur, warping due to temperature rise is more suppressed, and the occurrence of condensation (particularly condensation on the outside of a building) can be more suppressed, and the wall material A is lightweight and can be easily installed using a simple method.

[0035] The thickness of the aluminum layer is more preferably 40 nm or more. The upper limit of the thickness of the aluminum layer is not particularly limited, and can be, for example, 0.2 mm or less. For example, when the aluminum layer is an aluminum vapor deposition film, the thickness is 10 nm to 80 nm (usually 40 nm), and when the aluminum layer is an aluminum foil, the thickness is 0.006 mm to 0.2 mm (usually 0.006 to 0.02 mm).

[0036] In the aluminum composite layer, a thermoplastic resin film may be provided on at least one side of the aluminum layer. In the wall material A according to the embodiment shown in FIG. 1, in the aluminum composite layer 2, a thermoplastic resin film 2b is directly bonded to both sides of the aluminum layer 2a. When a thermoplastic resin film is provided on one or both sides of the aluminum layer, the moisture resistance and corrosion resistance of the wall material are likely to be improved. The thermoplastic resin film may be bonded directly to the aluminum layer, or may be bonded to the aluminum layer via another layer.

[0037] The type of the thermoplastic resin film is not particularly limited, and for example, a wide variety of known thermoplastic resin films can be applied to the present invention. Examples of thermoplastic resin films include polyolefin films such as polyethylene and polypropylene, as well as polyethylene terephthalate films, polyvinyl chloride films, polyvinylidene chloride films, acrylic films, polycarbonate films, polyvinyl alcohol films, polyamide films, and cellulose films.

[0038] In the aluminum composite layer, the decorative layer is, for example, a layer for imparting design to the wall material. The type of the decorative layer is not particularly limited, and examples thereof include a wide range of known decorative layers, such as pulp paper, vinyl chloride cloth sheet, and other known decorative films.

[0039] The type of pulp paper is not particularly limited, and examples thereof include commercially available printing and information paper (high-quality printing paper, coated paper, etc.), wrapping paper (unbleached wrapping paper, bleached wrapping paper), cardboard base paper (liner, etc.), and miscellaneous paperboard (building material base paper, etc.).

[0040] The surface of the decorative layer may have a decorative coating film. For example, if the decorative layer is pulp paper, a decorative coating film may be formed on the surface of the pulp paper. As in the wall material A according to the embodiment shown in FIG. 1 , the decorative layer 2c has a decorative coating film 3 formed on its surface, thereby imparting design to the wall material A. The surface of the decorative layer on which the decorative coating film is formed is the surface side of the wall material, i.e., the side opposite the fire-resistant layer and facing the glass when installed as a glass curtain wall.

[0041] The decorative layer may be disposed on the surface side of the wall material, as shown in Fig. 1. In particular, when the wall material is applied to a glass curtain wall, the decorative layer 2c may be disposed on the glass surface side of a building, etc. In this case, the decorative coating film formed on the surface of the pulp paper may be disposed on the surface side of the wall material.

[0042] The decorative layer can be provided directly on the surface of the aluminum layer, or a layer other than the aluminum layer can be interposed between the decorative layer and the aluminum layer, as shown in Figure 1. In the embodiment of Figure 1, a thermoplastic resin film 2b is interposed between the decorative layer 3 and the aluminum layer 2a.

[0043] Furthermore, the bonding of the decorative layer and the aluminum layer is not limited to the embodiment shown in FIG. 1, and they can also be bonded together by known wet lamination or dry lamination, for example.

[0044] In the wall material of the present invention, the aluminum composite layer is provided on at least one side of the fire-resistant layer. The aluminum composite layer is provided on only one side of the fire-resistant layer, but can also be provided on both sides depending on the purpose.

[0045] In the wall material of the present invention, the aluminum composite layer and the fire-resistant layer can be bonded by an adhesive layer. In this case, the wall material A is likely to exhibit moisture-proof, heat-resistant, and water-resistant properties. In the embodiment of Fig. 1, as described above, the fire-resistant layer 1 and the aluminum composite layer 2 are bonded by the adhesive layer 4, and the aluminum layer 2a of the aluminum composite layer 2 and the fire-resistant layer 1 are bonded together via the adhesive layer 4. A layer consisting of a thermoplastic resin film 2b and the adhesive layer 4 may be interposed between the aluminum layer 2a of the aluminum composite layer 2 and the fire-resistant layer 1.

[0046] The type of adhesive layer is not particularly limited, and a wide range of known adhesives can be used. Among them, it is preferable that the adhesive layer is formed using an adhesive used in building materials. Examples of adhesives for forming the adhesive layer include silicone resin adhesives, modified silicone resin adhesives, acrylic resin adhesives, epoxy resin adhesives, urethane resin adhesives, and silylated urethane adhesives. In particular, silicone adhesives and urethane resin adhesives are preferred in terms of heat resistance, water resistance, and weather resistance.

[0047] The wall material of the present invention can have a structure in which the fire-resistant layer, the aluminum layer, and the decorative layer are laminated in this order, as shown in Figure 1, for example. Alternatively, the wall material of the present invention can have a structure in which the fire-resistant layer, the decorative layer, and the aluminum layer are laminated in this order. From the viewpoint of making it less likely for temperature rise due to heat to occur and more likely to suppress warping due to temperature rise, it is preferable that the wall material of the present invention has the fire-resistant layer, the aluminum layer, and the decorative layer laminated in this order. In other words, it is preferable that the wall material have the laminate structure of wall material A as shown in Figure 1.

[0048] The wall material of the present invention, configured as described above, is less likely to experience a temperature rise due to heat and is also less likely to warp due to a temperature rise. Furthermore, the wall material of the present invention is more likely to prevent moisture from being released to the surface side (e.g., the decorative layer side), less likely to cause condensation on the glass surface, and more likely to suppress surface deterioration. In particular, the aluminum layer makes it easier to prevent moisture from being released to the surface side through the wall material, and also makes it difficult for water or moisture from the surface side (the decorative layer side) to penetrate the fireproof material.

[0049] The size and shape of the wall material of the present invention are not particularly limited and can be the same as that of known fire-resistant materials depending on the application. The size and shape of the fire-resistant layer and aluminum composite layer can also be appropriately selected depending on the size and shape of the wall material.

[0050] The wall material of the present invention is resistant to temperature rise due to heat, suppresses warping due to temperature rise, and can further suppress the occurrence of condensation on the glass surface, so it can be used in a variety of applications. For example, the wall material of the present invention can be used for various wall components, such as curtain walls of buildings and other structures. In particular, the wall material is suitable for curtain walls, and can be particularly suitable for use in glass curtain walls.

[0051] The present invention will be explained in more detail below with reference to examples, but the present invention is not limited to these examples.

[0052] (Example 1) A refractory material disclosed in JP 2021-161016 A was prepared. Specifically, 41 parts by mass of alumina cement, 41 parts by mass of blast furnace cement, and 10 parts by mass of wollastonite were weighed into a container, and water was added so that the water-to-solids ratio of the final mixture (mass of water / total mass of solids) was 1.03, followed by stirring to obtain a slurry. Next, 5 parts by weight of an aqueous slurry of calcium silicate hydrate consisting of agglomerates (secondary particles) in which xonotlite is mixed with a small amount of tobermorite was added as a heat resistance imparting substance (however, the amount added for the aqueous slurry of calcium silicate hydrate is calculated as solids). The method for producing an aqueous slurry of calcium silicate hydrate consisting of agglomerates (secondary particles) in which xonotlite is mixed with a small amount of tobermorite was as follows. Quicklime slaked in 12 times the mass of warm water was added with silica powder in a molar ratio (CaO / SiO ２ The raw material slurry was placed in an autoclave equipped with a stirrer and stirred while being heated to a saturated water vapor pressure of 15 kgf / cm. ２ The mixture was reacted for 3 hours at 20°C to obtain an aqueous slurry of calcium silicate hydrate. Next, foams prepared by separately mixing and foaming water and 0.3 parts by mass of a foaming agent were introduced into the slurry. Two parts by mass of glass fiber were then added and stirred to prepare a foamy slurry (mixture). The total mass of the solids was the total mass of alumina cement, blast furnace cement, wollastonite, calcium silicate hydrate (solid content equivalent), foaming agent, and glass fiber. The obtained slurry was poured into a mold and molded. After molding, the molded product was sealed with a vinyl sheet to prevent drying and allowed to stand at room temperature (30°C) for 24 hours to cure, yielding a hardened product. The hardened product was further allowed to stand under saturated steam at 60°C for 24 hours to cure, and then naturally dried to obtain a dried molded product. The refractory material cut out from the molded product had a density of 0.6 g / cm. ３ The dimensions were 150 mm x 150 mm x 25 mm.

[0053] One side of the fireproof material thus obtained was coated with 200 g / m of silicone sealant. ２An adhesive layer was formed by applying a coating of aluminum kraft paper onto the adhesive layer to form an aluminum composite layer. The aluminum composite layer was made of a polyethylene film having a thickness of 15 μm, an aluminum foil having a thickness of 20 μm, a polyethylene film having a thickness of 15 μm, and pulp paper (75 g / m ２ The polyethylene film side of the laminate was directly bonded to the adhesive layer, thereby obtaining a wall material consisting of a laminate of a fire-resistant layer and an aluminum composite layer (aluminum kraft paper).

[0054] (Example 2) A wall material consisting of a laminate of a fire-resistant layer and an aluminum composite layer (aluminum kraft paper) was obtained in the same manner as in Example 1, except that the pulp paper side of the aluminum kraft paper was directly bonded to the adhesive layer.

[0055] (Example 3) The fireproof material was Ecolux (manufactured by Nichias Corporation, density 0.89 g / cm ３ A wall material consisting of a laminate of a fire-resistant layer (Ecorax) and an aluminum composite layer (aluminum kraft paper) was obtained in the same manner as in Example 1, except that the laminate was changed to a laminate consisting of two sheets of fire-resistant layer (Ecorax, 150 mm x 150 mm x 12 mm) (the layers were fixed at three points on each side with a tacker).

[0056] (Example 4) The fireproof material was Ecolux (manufactured by Nichias Corporation, density 0.89 g / cm ３ A wall material consisting of a laminate of a fire-resistant layer (Ecorax) and an aluminum composite layer (aluminum kraft paper) was obtained in the same manner as in Example 2, except that the laminate was changed to a laminate consisting of two sheets of fire-resistant layer (Ecorax, 150 mm x 150 mm x 12 mm) (the layers were fixed at three points on each side with a tacker).

[0057] (Comparative Example 1) The fireproof material was Dailite (manufactured by Daiken Corporation, density 0.58 g / cm ３ A wall material consisting of a laminate of a fire-resistant layer (Dailite) and an aluminum composite layer (aluminum kraft paper) was obtained in the same manner as in Example 1, except that the laminate consisted of two sheets of aluminum kraft paper (150 mm x 150 mm x 12 mm) (the layers were fixed at three points on each side with a tacker).Dailite is a volcanic glassy multi-layer board.

[0058] (Comparative Example 2) The fireproof material was Dailite (manufactured by Daiken Corporation, density 0.58 g / cm ３ A wall material consisting of a laminate of a fire-resistant layer (Dailite) and an aluminum composite layer (aluminum kraft paper) was obtained in the same manner as in Example 2, except that the laminate was changed to a laminate consisting of two sheets of fire-resistant layer (Dailite) and two sheets of aluminum kraft paper (150 mm x 150 mm x 12 mm) (the layers were fixed at three points on each side with a tacker).

[0059] (Test Method) <Indoor Heating Test> Figure 2 is a schematic diagram of the test equipment used in the indoor heating test. A horizontal electric furnace with an open top and a 130 x 130 mm heating surface on the ceiling was used as the heating test furnace. A thermocouple for controlling the temperature inside the furnace was installed at a position (furnace temperature control position) 50 mm below (inside the furnace) from the center of the heating surface. The manufactured 150 x 150 mm wall material was installed at the center of the opening with the refractory layer side facing downward (toward the inside of the horizontal electric furnace). The molded body was cured by covering the side of the wall material with a 25 mm thick ceramic blanket. The ISO 834 standard heating curve (T = 345 log １０ The temperature was raised along the (8t+1)+20) (where T is the furnace temperature and t is the elapsed time) until the furnace temperature reached 842°C after 30 minutes. A thermocouple was placed at the center of the unheated surface of the wall material (the surface opposite to the surface inside the furnace), and the unheated surface temperature (the back surface temperature of the heated surface) was measured every minute from the start of the temperature rise until 30 minutes of heating to monitor the temperature rise. The back surface temperature rise (K) during the test, and the warpage (mm) and shrinkage rate (%) of the test specimen after the test were evaluated.

[0060] <Outdoor Heating Test> The test was carried out in the same manner as the indoor heating test, except that the wall material was placed with the fire-resistant layer side facing up (opposite the inside of the horizontal electric furnace) at the center of the opening.

[0061] <Shrinkage Rate> The length and width dimensions of the wall material test specimen were measured before and after the heating test, and the shrinkage rate (%) was calculated according to the following formula: Shrinkage rate (%) = (dimension before heating test - dimension after heating test) ÷ (dimension before heating test) × 100. The dimensions after the heating test were measured after the specimen was allowed to cool to room temperature. The length and width were measured at the end on the heated side, and the average value of the shrinkage rates of the length and width was taken as the shrinkage rate.

[0062] <Warpage> After the heating test, the test specimen was allowed to cool to room temperature. A flat bar was placed on the heated surface of the cooled test specimen, and the gap between the test specimen and the flat bar, which was generated by the thermal deformation of the test specimen, was measured with a taper gauge and recorded as the warpage (mm).

[0063]

[0064] Table 1 shows the results of the indoor heating test evaluation of the wall materials obtained in each Example and Comparative Example. The wall materials obtained in the Examples were less susceptible to temperature rise due to heat than the wall materials obtained in the Comparative Examples. Furthermore, warping due to temperature rise was suppressed to an acceptable level.

[0065]

[0066] Table 2 shows the results of the outdoor heating test evaluation of the wall materials obtained in each Example and Comparative Example. The wall materials obtained in the Examples were less susceptible to temperature rise due to heat than the wall materials obtained in the Comparative Examples. Furthermore, warping due to temperature rise was suppressed to an acceptable level.

[0067] From the above, it has been proven that the wall materials obtained in the examples are suitable for curtain walls because they are less likely to experience temperature increases due to heat, are less likely to warp due to temperature increases, and are less likely to cause condensation on the glass surfaces.

[0068] A: Wall material 1: Fireproof layer 2: Aluminum composite layer 2a: Aluminum layer 2b: Thermoplastic resin film 2c: Decorative layer 4: Adhesive layer 3: Decorative layer

Claims

1. A glass curtain wall comprising a wall material, The wall material is A fire-resistant layer and an aluminum composite layer provided on at least one surface of the fire-resistant layer, The aluminum composite layer includes an aluminum layer and a decorative layer, The fire-resistant layer, the aluminum layer, and the decorative layer are laminated in this order, The fire-resistant layer is a glass curtain wall, excluding a volcanic vitreous laminate.

2. A glass curtain wall comprising a wall material, The wall material is A fire-resistant layer and an aluminum composite layer provided on at least one surface of the fire-resistant layer, The aluminum composite layer includes an aluminum layer and a decorative layer, The fire-resistant layer, the aluminum layer, and the decorative layer are laminated in this order, The glass curtain wall, wherein the fireproof layer is a calcium silicate board, a gypsum board, a rock wool board, an ALC board, or a cement board.

3. (delete)

4. 3. The glass curtain wall according to claim 1, wherein the aluminum composite layer and the fire-resistant layer are bonded together by an adhesive layer.

5. The glass curtain wall according to claim 1 or 2, wherein the decorative layer comprises pulp paper.

6. 3. The glass curtain wall according to claim 1, wherein the aluminum layer has a thickness of 10 nm or more.