Wall material and glass curtain wall

Abstract

To provide a wall material in which peeling hardly occurs in an aluminum layer attached to a refractory material, even under a high-temperature environment such as fire, at the time of handling and in the case where an external force is applied such as wind power, and which has a high heat-insulation property under a high-temperature environment, and to provide a glass curtain wall which includes the wall material.SOLUTION: In a wall material, a fireproof layer 1, an adhesive layer 5, and an aluminum composite layer 2 are laminated in this order. The aluminum composite layer 2 includes an aluminum layer 2a and a decorative layer 2c. A surface on the aluminum layer 2a side is attached to the adhesive layer 5, and a thermoplastic resin layer is not interposed between the aluminum layer 2a and the adhesive layer 5.SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] Glass curtain walls have traditionally been formed on each floor of a building or other structure by providing fire-resistant materials (wall materials) 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 heat-absorbing material. 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. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-190584 Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional fire-resistant materials for curtain walls are prone to temperature rise due to heat, and there is still room for improvement in their heat-shielding properties. In particular, wall materials used for glass curtain walls are required to have high heat-shielding properties even in the event of a fire or other disaster.

[0006] The inventors have investigated this point and found that, although a heat-shielding film (e.g., an aluminum material) is sometimes attached to a fire-resistant material to provide heat-shielding properties, the heat-shielding film peels off when the material becomes hot due to the heat of a fire or the like, and that the heat-shielding film is also likely to peel off when the material is handled or due to external forces such as wind force.

[0007] In particular, heat-shielding films that are composed of a heat-shielding material and a thermoplastic resin film to increase strength are known, but it has been found that such heat-shielding films are significantly more susceptible to peeling when the thermoplastic resin film is present on the fire-resistant material side. For example, an aluminum composite layer has increased strength by having a thermoplastic resin film attached to the surface of the aluminum layer, which has the effect of increasing the strength of the wall material, but when external pressure that would cause peeling is applied to the aluminum layer, the aluminum composite layer's great strength causes the entire aluminum composite layer to peel off from the adhesive layer, resulting in a loss of heat-shielding properties.

[0008] The present invention has been made in view of the above, and aims to provide a wall material that is resistant to peeling of the aluminum layer attached to the fire-resistant material, even in high-temperature environments such as fires, or when external forces such as wind force are applied during handling, and that has high heat insulation properties even in high-temperature environments, and a glass curtain wall comprising such a wall material. [Means for solving the problem]

[0009] As a result of extensive research to achieve the above object, the inventors have found that the above object can be achieved by forming a fire-resistant layer, an adhesive layer, and an aluminum composite layer each with a specific layer configuration, and have completed the present invention. Specifically, by not interposing a thermoplastic resin film between the aluminum layer and the adhesive layer of the aluminum composite layer, when external pressure is applied to the aluminum composite layer, the decorative layer can be broken, thereby allowing the aluminum layer to remain attached to the fire-resistant layer.

[0010] That is, the present invention includes, for example, the subject matter described in the following sections. Item 1 a fire-resistant layer, an adhesive layer, and an aluminum composite layer laminated in this order; The aluminum composite layer includes an aluminum layer and a decorative layer, the surface of the aluminum layer side is bonded to the adhesive layer, A wall material in which no thermoplastic resin layer is interposed between the aluminum layer and the adhesive layer. Section 2 Item 2. The wall material according to item 1, wherein the fire-resistant layer is a layer other than a volcanic vitreous laminate. Section 3 Item 1. The wall material according to item 1, wherein the fire-resistant layer is a calcium silicate board, a gypsum board, a rock wool board, an ALC board, or a cement board. Section 4 Item 4. The wall material according to any one of items 1 to 3, wherein the decorative layer contains pulp paper. Section 5 Item 5. The wall material according to any one of items 1 to 4, wherein the aluminum layer has a thickness of 10 nm or more. Section 6 Item 6. The wall material according to any one of items 1 to 5, which is for a glass curtain wall. Section 7 Item 6. A glass curtain wall comprising the wall material according to item 6. [Effects of the Invention]

[0011] The wall material of the present invention is resistant to peeling of the aluminum layer attached to the fire-resistant material, even in high-temperature environments such as fires, and can maintain high heat-shielding properties even in high-temperature environments. Furthermore, the wall material of the present invention is resistant to peeling of the heat-shielding film when handled or subjected to external forces such as wind force. [Brief explanation of the drawings]

[0012] [Figure 1] 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 thereof. [Figure 2]FIG. 1 is a schematic diagram of a test device for evaluating heat-shielding properties. DETAILED DESCRIPTION OF THE INVENTION

[0013]

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

[0014] 1. Wall materials The wall material of the present invention is composed of a fire-resistant layer, an adhesive layer, and an aluminum composite layer laminated in this order. In the wall material of the present invention, the aluminum composite layer contains an aluminum layer and a decorative layer, and the surface of the aluminum layer is bonded to the adhesive layer. However, no thermoplastic resin layer is interposed between the aluminum layer and the adhesive layer.

[0015] The wall material of the present invention is resistant to peeling of the aluminum layer bonded to the fire-resistant material, even in high-temperature environments such as fires, and can maintain high heat-shielding properties even in high-temperature environments. Furthermore, the wall material of the present invention is lightweight, can be installed using a simple method, and is easy to process. The wall material of the present invention can be suitably used for curtain walls of buildings, and can be used to install curtain walls that are easy to suppress the occurrence of condensation. Furthermore, even in normal conditions other than fires, the wall material of the present invention can prevent peeling of the aluminum layer, which can occur due to handling or external forces after installation, and as a result, heat-shielding properties and moisture resistance can be maintained for a long period of time.

[0016] 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 W.

[0017] The wall material W is formed by laminating a fire-resistant layer 1, an adhesive layer 5, and an aluminum composite layer 2 in this order. As shown in FIG. 1, the aluminum composite layer 2 includes an aluminum layer 2a and a decorative layer 2c. In the embodiment shown in FIG. 1, the aluminum layer 2a is bonded directly to the adhesive layer 5 (without any intervening layer). Therefore, no thermoplastic resin layer is interposed between the aluminum layer 2a and the adhesive layer 5. As shown in FIG. 1, it is preferable that no layer is interposed between the aluminum layer 2a and the adhesive layer 5; that is, it is preferable that the aluminum layer 2a is bonded directly to the adhesive layer 5, as in the embodiment shown in FIG. 1.

[0018] Because the aluminum layer 2a is directly bonded to the adhesive layer 5, even if a temperature rise occurs due to a fire or the like, the aluminum layer 2a is unlikely to peel off from the fire-resistant layer 1, and excellent heat-shielding properties can be maintained even in an environment where a temperature rise occurs. Moreover, even if an external force such as wind acts on the aluminum layer 2a, which is bonded to the fire-resistant material, is unlikely to peel off, and high heat-shielding properties and moisture-proof properties can be maintained.

[0019] If a thermoplastic resin layer such as a polyethylene film is bonded to the aluminum layer 2a, the thermoplastic resin layer will be interposed between the aluminum layer 2a and the adhesive layer 5. In this case, if a temperature rise occurs due to a fire or the like, or if an external force is applied, peeling of the aluminum layer 2a bonded to the fire-resistant material will become noticeable, and the heat-shielding and moisture-proof properties will be significantly impaired.

[0020] The elements constituting the wall material of the present invention, specifically the fire-resistant layer 1, adhesive layer 5, aluminum composite layer 2, etc., will be described below. In the following description, the numbers shown in Figure 1 will be omitted.

[0021] (Fireproof layer) The fire-resistant layer is a layer formed of a fire-resistant material and serves as a base material for the wall material, enabling the wall material to exhibit fire resistance. The fire-resistant layer can be formed of, for example, a fire-resistant material used in known wall materials.

[0022] The fire-resistant layer may be a layer other than a volcanic vitreous laminate board, or may be a calcium silicate board, a gypsum board, a rock wool board, an ALC board, or a cement board.

[0023] The volcanic vitreous multilayer board is a product made by combining particles of volcanic glass deposits (such as shirasu balloons, white clay, and pumice) and their foams, inorganic fibers (rock wool, glass wool), and inorganic powders (such as fly ash and calcium carbonate), 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 Corporation's "Dailite." Note that the volcanic vitreous multilayer board is a different material from calcium silicate boards, gypsum boards, rock wool boards, ALC boards, and cement boards.

[0024] The type of calcium silicate board that can be used in the fireproof 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 fireproof 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 fireproof 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 fireproof layer are also not particularly limited.

[0025] A specific example of the lightweight cement board disclosed in JP 2021-161016 A is 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 applied. 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.

[0026] 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. As a result, the temperature of the refractory material is less likely to rise, and fire resistance is likely to be improved.

[0027] 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.

[0028] 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 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.

[0029] The material containing an oxide of silicon may be used alone or in combination of two or more kinds.

[0030] It is particularly preferable that the material containing silicon oxide is 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.

[0031] Lightweight cement boards can be formed by curing a mixture containing the alumina cement, at least one material containing silicon oxide, and water. Such a mixture can contain additives other than the alumina cement and the material containing silicon oxide. 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 silicon oxide. 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.

[0032] Examples of fire-resistant layers that can be applied to the wall material of the present invention include "Ecolux" manufactured by Nichias Corporation and "Taikalite" manufactured by Nippon Insulation Co., Ltd.

[0033] It is particularly preferable that the fire-resistant layer is a lightweight cement board as disclosed in JP 2021-161016 A. This makes the wall material of the present invention particularly resistant to temperature rise due to heat and further suppresses warping due to temperature rise, making it particularly suitable for curtain walls.

[0034] (aluminum composite layer) The aluminum composite layer is a layer comprising an aluminum layer and a decorative layer, and can impart heat insulation properties to the wall material as well as decorative features.

[0035] 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.

[0036] The thickness of the aluminum layer is preferably, for example, 10 nm or more, which increases the wall material's effect of suppressing temperature rise when the wall material is used as a curtain wall, further suppresses warping due to temperature rise, and further suppresses the occurrence of condensation (particularly condensation on the outside of a building).

[0037] The thickness of the aluminum layer is more preferably 40 nm or more, even more preferably 100 nm or more, and particularly preferably 500 nm or more. There is no particular upper limit to the thickness of the aluminum layer, and it can be, for example, 0.2 mm or less. For example, when the aluminum layer is an aluminum vapor deposition film, its thickness is 10 nm to 80 nm (usually 40 nm), and when the aluminum layer is an aluminum foil, its thickness is 0.006 mm to 0.2 mm (usually 0.006 mm to 0.02 mm).

[0038] In the aluminum composite layer, at least one surface of the aluminum layer is directly bonded to the adhesive layer as described above, and therefore no thermoplastic resin layer such as a thermoplastic resin film is formed on the surface of the aluminum layer facing the adhesive layer.

[0039] On the other hand, a thermoplastic resin layer such as a thermoplastic resin film may be provided on the surface of the aluminum layer facing the decorative layer. In this case, the moisture resistance and corrosion resistance of the wall material are likely to be improved. The thermoplastic resin film may be attached to the surface of the aluminum layer facing the decorative layer by various lamination methods. The type of thermoplastic resin film is not particularly limited, and for example, a wide range 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.

[0040] 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.

[0041] 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.).

[0042] The decorative layer may have a decorative coating film on its surface. For example, when the decorative layer is made of pulp paper, the decorative coating film may be formed on the surface of the pulp paper. 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.

[0043] The decorative layer may be disposed on the surface side of the wall material. When the wall material is applied to a glass curtain wall, the decorative layer 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.

[0044] The decorative layer may be provided directly on the surface of the aluminum layer, or, as described above, a thermoplastic resin layer such as a thermoplastic resin film may be interposed between the decorative layer and the aluminum layer. The decorative layer and the aluminum layer can be bonded together by various lamination methods such as known wet lamination and dry lamination.

[0045] 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. The aluminum composite layer is preferably provided on only one side of the fire-resistant layer. In this case, it is preferable that no layer is formed on the side of the fire-resistant layer opposite the aluminum composite layer.

[0046] (adhesive layer) The adhesive layer is a layer disposed between the fire-resistant layer and the aluminum composite layer, and serves to bond the fire-resistant layer and the aluminum composite layer. The adhesive layer is preferably in direct contact with the aluminum layer of the aluminum composite layer, thereby bonding the fire-resistant layer and the aluminum composite layer. In particular, in the present invention, no thermoplastic resin layer is disposed between the adhesive layer and the aluminum layer. However, it is permissible for a layer other than the thermoplastic resin layer to be interposed between the adhesive layer and the aluminum layer, as long as the effects of the present invention are not impaired.

[0047] The adhesive layer can be formed, for example, using an adhesive. Examples of such adhesives include silicone resin adhesives, modified silicone-epoxy resin adhesives, acrylic resin adhesives, epoxy resin adhesives, urethane resin adhesives, and silylated urethane adhesives. The adhesive may be a one-component type or a two-component mixed type.

[0048] Among these, the adhesive is preferably a silicone resin adhesive or a modified silicone-epoxy resin adhesive, which can more firmly bond the aluminum layer to the fire-resistant material layer, making the aluminum layer bonded to the fire-resistant material less likely to peel off even at high temperatures, and less likely to lose its heat-shielding properties.Furthermore, the aluminum layer is less likely to peel off even when subjected to external force, and less likely to lose its heat-shielding properties and moisture-proof properties.

[0049] (wall materials) The method for producing the wall material of the present invention is not particularly limited, and it can be produced, for example, by bonding a fire-resistant layer and an aluminum composite layer with an adhesive. In this case, the surface of the aluminum composite layer facing the aluminum layer is joined to the fire-resistant layer with an adhesive. This results in a wall material in which the fire-resistant layer, the adhesive layer, and the aluminum composite layer are laminated in this order.

[0050] In the wall material of the present invention, the surface on the aluminum layer side is bonded to the adhesive layer, and no thermoplastic resin layer is interposed between the aluminum layer and the adhesive layer, so the aluminum layer is less likely to peel off from the fire-resistant layer and excellent heat-shielding properties can be maintained for a long period of time. Furthermore, even in the event of a fire or other event that creates a high-temperature environment, the aluminum layer is less likely to peel off from the fire-resistant layer, so the heat-shielding properties are less likely to be lost even at high temperatures.

[0051] Furthermore, the wall material of the present invention is less susceptible to temperature rise due to heat and also suppresses warping due to temperature rise. In addition, the wall material of the present invention is more likely to suppress moisture release 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 provision of an 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 (decorative layer side) to penetrate the fireproof material.

[0052] The size and shape of the wall material of the present invention are not particularly limited and can be the same as those 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.

[0053] The wall material of the present invention can be applied to various uses, for example, it can be used for various wall components such as curtain walls of buildings etc. In particular, the wall material is suitable for curtain walls, and can be particularly suitable for glass curtain walls. [Example]

[0054] The present invention will be explained in more detail below with reference to examples, but the present invention is not limited to these examples.

[0055] Example 1 The 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. The mixture was stirred to obtain a slurry. Next, 5 parts by weight of an aqueous slurry of calcium silicate hydrate composed of agglomerates (secondary particles) of xonotlite mixed with a small amount of tobermorite was added as a heat resistance-imparting substance (however, the amount of the aqueous slurry of calcium silicate hydrate added is calculated as the solid content). The aqueous slurry of calcium silicate hydrate composed of agglomerates (secondary particles) of xonotlite mixed with a small amount of tobermorite was produced as follows. Quicklime slaked in 12 times the mass of warm water was mixed with silica powder so that the molar ratio (CaO / SiO2) was 1.00, and water was further added to this to adjust the water to solid ratio to 12 to prepare a raw material slurry. This raw material slurry was placed in an autoclave equipped with a stirrer and stirred and mixed while maintaining a saturated water vapor pressure of 15 kgf / cm. 2 The mixture was reacted at 200°C for 3 hours to obtain an aqueous slurry of calcium silicate hydrate. Next, foams prepared by mixing and foaming 0.3 parts by mass of water and a foaming agent were introduced into the slurry. Two parts by mass of glass fiber were then added and stirred to prepare a foamed 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 for 24 hours to cure, yielding a hardened product. This hardened product was further cured under saturated steam at 60°C for 24 hours, dried to a constant weight in an atmosphere at 60°C, and then further dried to a constant weight in an atmosphere at 23°C and 50% RH to obtain a molded product. The refractory material cut from this molded product had a density of 0.6 g / cm. 3 The sizes were 80 x 25 (thickness 27.5 mm, for peeling test) and 130 x 130 (thickness 27.5 mm, for heating test).

[0056] Silicone resin adhesive 1 (Cemedine "PM100") was applied at 140 g / m to one side of each of the fire-resistant materials obtained in this way. 2 An aluminum kraft paper was prepared as an aluminum composite layer on the adhesive layer, and this was laminated to the adhesive layer. The aluminum kraft paper was composed of an aluminum foil (aluminum layer) with a thickness of 7 μm, a polyethylene film with a thickness of 15 μm, and pulp paper (84 g / m 2 ) were directly bonded to each other in this order, and the aluminum foil side of the laminate was directly bonded to the adhesive layer. In this way, two types of wall materials were obtained, each consisting of a laminate of a fire-resistant material layer and an aluminum composite layer (aluminum kraft paper). The wall material obtained from the fire-resistant material measuring 80 x 25 (thickness 27.5 mm) was designated "Wall Material A" and used as a test specimen for the peel test described below. The other wall material obtained from the fire-resistant material measuring 130 x 130 (thickness 27.5 mm) had a water-based acrylic paint applied to the pulp paper surface at 80 g / m 2 The resulting wall material was designated "Wall Material B" and used as a test specimen for the heating test described below.

[0057] Example 2 Two types of wall materials A and B were obtained in the same manner as in Example 1, except that silicone resin adhesive 2 (Cemedine "Super NoX8008") was used instead of silicone resin adhesive 1.

[0058] Example 3 Two types of wall materials A and B were obtained in the same manner as in Example 1, except that silicone resin adhesive 3 (Konishi Co., Ltd. "MPX-1 Gray") was used instead of silicone resin adhesive 1.

[0059] Example 4 Two types of wall materials A and B were obtained in the same manner as in Example 1, except that epoxy resin adhesive 1 (a two-component adhesive made from Arteco's "Arteco 3600 (main agent)" and "Arteco 3600 (hardener)") was used instead of silicone resin adhesive 1.

[0060] Example 5 Two types of wall materials A and B were obtained in the same manner as in Example 1, except that modified silicone-epoxy resin adhesive 1 (Konishi's two-component adhesive "Bond MOS1050A Agent" and "Bond MOS1050B Agent") was used instead of silicone resin adhesive 1.

[0061] (Comparative Example 1) The aluminum craft paper is a laminated film made of 20 μm thick aluminum foil with 15 μm thick polyethylene film laminated on both sides, and pulp paper (75 g / m 2 Two types of wall materials A and B were obtained in the same manner as in Example 1, except that the wall materials A and B were laminated in this order, with a polyethylene film interposed between the adhesive layer and the aluminum layer (aluminum foil).

[0062] (Comparative Example 2) The aluminum craft paper is a laminated film made of 20 μm thick aluminum foil with 15 μm thick polyethylene film laminated on both sides, and pulp paper (75 g / m 2 ) were directly bonded to each other in this order, two types of wall material A and wall material B were obtained in the same manner as in Example 2. That is, in such wall material A and wall material B, a polyethylene film was interposed between the adhesive layer and the aluminum layer (aluminum foil).

[0063] (Comparative Example 3) The aluminum craft paper is a laminated film made of 20 μm thick aluminum foil with 15 μm thick polyethylene film laminated on both sides, and pulp paper (75 g / m 2 Two types of wall materials A and B were obtained in the same manner as in Example 3, except that the wall materials A and B were laminated in this order, with a polyethylene film interposed between the adhesive layer and the aluminum layer (aluminum foil).

[0064] Comparative Example 4 The aluminum craft paper is a laminated film made of 20 μm thick aluminum foil with 15 μm thick polyethylene film laminated on both sides, and pulp paper (75 g / m 2 Two types of wall materials A and B were obtained in the same manner as in Example 4, except that the wall materials A and B were laminated in this order, with a polyethylene film interposed between the adhesive layer and the aluminum layer (aluminum foil).

[0065] (Comparative Example 5) The aluminum craft paper is a laminated film made of 20 μm thick aluminum foil with 15 μm thick polyethylene film laminated on both sides, and pulp paper (75 g / m 2 ) were directly bonded to each other in this order, two types of wall material A and wall material B were obtained in the same manner as in Example 5. That is, in such wall material A and wall material B, a polyethylene film was interposed between the adhesive layer and the aluminum layer (aluminum foil).

[0066] (Test Method) <Adhesion evaluation (180° peel test)> A 180° peel test was conducted using the wall material A obtained in each Example and Comparative Example as a test specimen to evaluate the adhesive strength of the aluminum foil (aluminum layer). Specifically, the 180° peel test was conducted according to the following procedure. First, the end of the aluminum kraft paper protruding laterally from the surface of the fireproof material layer of the test specimen was folded back in a 180° direction, and cellophane tape was attached to extend the handle. The test specimen was then placed so that the aluminum kraft paper was perpendicular to the horizontal plane. Next, using a universal testing machine, the cellophane tape was gripped and peeled 60 mm in a 180° direction from the aluminum kraft paper at a speed of 300 mm / min. The surface condition of the fireproof layer (fireproof material) was observed, and the adhesiveness was evaluated based on the following criteria. For reference, the tensile load during the peel test was recorded over time. The maximum tensile load for each test is shown in Table 1. ≪Judgment criteria≫ ◯: The area of ​​the aluminum foil remaining on the surface of the fire-resistant layer was 80% or more of the entire fire-resistant layer, and the adhesion was extremely good. Δ: The area of ​​the aluminum foil remaining on the surface of the fire-resistant layer was 10% or more and less than 80% of the entire fire-resistant layer, and the adhesiveness was at a level that presented no practical problems. ×: The area of ​​the aluminum foil remaining on the surface of the fire-resistant layer was less than 10% of the entire fire-resistant layer, and the adhesion was extremely poor.

[0067] <Heat insulation> FIG. 2 is a schematic diagram of the test equipment used for the thermal insulation properties. A horizontal electric furnace with an open top and a 130 × 130 mm heating surface on the ceiling surface C was used as the heating test furnace Y, and the wall material B obtained in each of the examples and comparative examples was used as the test specimen. The thermal insulation property test using this test equipment was conducted in an environment of 23°C ± 3°C. A viewing window was provided on the side of the horizontal electric furnace to allow visual observation of the condition of the test specimen during heating. A thermocouple 20 for controlling the temperature inside the furnace was installed 50 mm below (inside the furnace) the center of the heating surface. The aluminum composite layer 2 (aluminum kraft paper side) of wall material B was positioned downward (inside the horizontal electric furnace) and installed at the center of the opening. The sides of the wall material were covered with a pair of 25 mm thick ceramic boards 10 to cure the molded body. The temperature inside the horizontal electric furnace was first kept constant at 300°C, and then the furnace temperature was raised according to the ISO 834 standard heating curve (T = 345 log10(8t + 1) + 20) (where T is the furnace temperature (°C) and t is the elapsed time (minutes)) until it reached 842°C after 30 minutes. The test was terminated 30 minutes after this temperature was reached. Note that the observation window was opened approximately 30 mm from 1 minute to 3 minutes after the start of the temperature rise. A thermocouple was installed in the center of the unheated surface of wall material B (the surface opposite the surface facing the furnace interior), and the unheated surface temperature (the heated surface backside temperature) was measured every minute from the start of the temperature rise until the end of the test to monitor the temperature rise, and the backside temperature rise (K) during the test was evaluated.

[0068] [Table 1]

[0069] Table 1 shows the evaluation results of the adhesiveness, maximum tensile load of the peel test, and heat-shielding properties of the wall materials obtained in each Example and Comparative Example. Table 1 shows that wall material A obtained in the Example has superior adhesiveness compared to the wall material obtained in the Comparative Example. Furthermore, although the maximum tensile loads of Examples 1, 2, and 3 are smaller than those of Comparative Examples 1, 2, and 3, the wall materials obtained in the Examples have superior adhesiveness compared to the wall materials obtained in the Comparative Examples. Furthermore, although the maximum tensile loads of Examples 4 and 5 are larger than those of Comparative Examples 4 and 5, the wall materials obtained in the Examples have superior adhesiveness compared to the wall materials obtained in the Comparative Examples. Furthermore, Table 1 shows that wall material B obtained in the Example has superior heat-shielding properties compared to the wall materials obtained in the Comparative Examples.

[0070] From the above, it was demonstrated that the wall materials obtained in the examples are less likely to have peeling of the aluminum layer, are less likely to lose their heat-shielding and moisture-proof properties, and have high heat-shielding properties even in high-temperature environments. [Explanation of symbols]

[0071] A: Wall material 1: Fireproof layer 2: Aluminum composite layer 2a: Aluminum layer 2c: cosmetic layer 5: Adhesive layer

Claims

1. a fire-resistant layer, an adhesive layer, and an aluminum composite layer laminated in this order; The aluminum composite layer includes an aluminum layer and a decorative layer, the surface of the aluminum layer side is bonded to the adhesive layer, A wall material in which no thermoplastic resin layer is interposed between the aluminum layer and the adhesive layer.

2. 2. The wall material according to claim 1, wherein the fire-resistant layer is a layer other than a volcanic vitreous laminate.

3. 2. The wall material according to claim 1, wherein the fire-resistant layer is a calcium silicate board, a gypsum board, a rock wool board, an ALC board, or a cement board.

4. The wall material of claim 1 , wherein the decorative layer comprises pulp paper.

5. The wall material according to claim 1 , wherein the aluminum layer has a thickness of 10 nm or more.

6. The wall material according to any one of claims 1 to 5, which is for a glass curtain wall.

7. A glass curtain wall comprising the wall material according to claim 6.

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