Building materials

Abstract

To provide a sheet for building materials and building materials that are highly effective in making combustible base materials noncombustible.SOLUTION: A sheet for building materials has a first layer consisting of aluminum or aluminum alloy foil and a second layer containing inorganic fibers. Tensile strength of the first layer is 100 N / m2 or more. The second layer is, for example, a glass fiber nonwoven fabric. The aluminum or aluminum alloy is, for example, H material. The first layer comprises, for example, aluminum alloy foil containing Mn and Mg. The aluminum alloy contains, for example, 0.5% or more and 1.5% or less by mass of Mn and 0.5% or more and 2% or less by mass of Mg.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a sheet for a building material and a building material. [Background technology]

[0002] Patent Document 1 discloses a laminated sheet. The laminated sheet is attached to the surface of a combustible substrate to make the substrate non-combustible. The laminated sheet includes an aluminum foil layer and a rock wool layer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-140539 Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand for a sheet for building materials that has an even greater effect of rendering a flammable substrate fireproof (hereinafter referred to as fireproofing effect). In one aspect of the present disclosure, it is preferable to provide a sheet for building materials and a building material that have an excellent fireproofing effect. [Means for solving the problem]

[0005] One aspect of the present disclosure is a method for manufacturing a sheet of plastic having a first layer made of aluminum or aluminum alloy foil and a second layer containing inorganic fibers, the first layer having a tensile strength of 100 N / m 2 The above is the construction material sheet.

[0006] In one aspect of the present disclosure, the building material sheet has a first layer having a tensile strength of 100 N / m 2 As a result, the fireproofing effect is high. [Brief explanation of the drawings]

[0007] [Figure 1]FIG. 2 is a cross-sectional view showing the structure of a sheet for building materials that does not include a third layer. [Figure 2] FIG. 2 is a cross-sectional view showing the structure of a sheet for building material having a third layer. [Figure 3] FIG. 1 is a cross-sectional view showing the structure of a building material. [Figure 4] FIG. 2 is a cross-sectional view showing the configuration of a building material in which a portion of a building material sheet is attached to the end grain. [Figure 5] FIG. 1 is a cross-sectional view showing the configuration of a building material in which a building material sheet is attached across two combustible substrates. [Figure 6] FIG. 1 is an explanatory diagram showing the state of building materials when heated by flames during a fire. [Figure 7] FIG. 2 is a cross-sectional view showing the configuration of test specimens S1 to S6. [Figure 8] FIG. 8A is a graph showing the measurement results of the test piece S1, and FIG. 8B is a graph showing the measurement results of the test piece S2. [Figure 9] FIG. 9A is a graph showing the measurement results of the test specimen S3, and FIG. 9B is a graph showing the measurement results of the test specimen S4. [Figure 10] FIG. 10A is a graph showing the measurement results of the test specimen S5, and FIG. 10B is a graph showing the measurement results of the test specimen S6. DETAILED DESCRIPTION OF THE INVENTION

[0008] Exemplary embodiments of the present disclosure will now be described with reference to the drawings. 1.Construction material sheets 1 (1) Overall structure of the building material sheet 1 The sheet for building material 1 has a sheet-like form. The thickness of the sheet for building material 1 is preferably 0.4 mm or more and 3.0 mm or less. When the thickness of the sheet for building material 1 is 0.4 mm or more, the fire-retardant effect is even higher. When the thickness of the sheet for building material 1 is 3.0 mm or less, the proportion of the sheet for building material 1 in the building material 11 is unlikely to become excessively large. Since the sheet for building material 1 has a fire-retardant effect, it functions, for example, as a fire-retardant sheet. The sheet for building material 1 may be manufactured, for example, in a factory or the like and delivered to the construction site, or it may be manufactured at the construction site.

[0009] (2) 1st layer 3 As shown in Figure 1, the building material sheet 1 includes a first layer 3 and a second layer 5. The first layer 3 is made of aluminum or aluminum alloy foil.

[0010] The tensile strength of the first layer 3 is 100N / m 2 The tensile strength is measured in accordance with "JIS Z2241 Metallic Material Tensile Test Method" which is applied mutatis mutandis to "JIS H4000 Aluminum and Aluminum Alloy Plates and Strips". The tensile strength of the first layer 3 is 100 N / m 2 The tensile strength of the first layer 3 is 130N / m 2 The tensile strength of the first layer 3 is preferably 130 N / m or more. 2 If it is more than this, the fire retardant effect is even higher.

[0011] The aluminum or aluminum alloy contained in the foil constituting the first layer 3 is, for example, O material or H material. O material is soft and annealed. H material is hard and work-hardened. The terms soft and hard have the meanings defined in "JISH0001 Aluminum, magnesium and their alloys - Quality symbols."

[0012] The aluminum or aluminum alloy contained in the foil constituting the first layer 3 is preferably an H material. When the aluminum or aluminum alloy contained in the foil constituting the first layer 3 is an H material, the tensile strength of the first layer 3 becomes even higher.

[0013] The first layer 3 is made of, for example, an aluminum alloy foil containing Mn and Mg. When the first layer 3 is made of an aluminum alloy foil containing Mn and Mg, the tensile strength of the first layer 3 is further increased. The aluminum alloy contains, for example, 0.5% to 1.5% by mass of Mn and 0.5% to 2% by mass of Mg. When the aluminum alloy contains 0.5% to 1.5% by mass of Mn and 0.5% to 2% by mass of Mg, the tensile strength of the first layer 3 is further increased.

[0014] The first layer 3 is made of, for example, an aluminum alloy foil having an international aluminum alloy name of 3304. When the first layer 3 is made of an aluminum alloy foil having an international aluminum alloy name of 3304, the tensile strength of the first layer 3 becomes higher.

[0015] The first layer 3 has a tensile strength of, for example, 100 N / m 2 It is made of aluminum alloy foil with a tensile strength of 100N / m or more. 2 Examples of JIS material symbols for the above aluminum alloys include 1N30-H18, 1060-H18, 1100-H18, 3003-O, 3003-H18, 3105-O, 3105-H18, 5505-O, 5505-H18, 5056-O, 5056-H18, 6N01-O, and 6N01-T5.

[0016] The first layer 3 has the effect of reflecting radiant heat caused by combustion in the event of a fire. The first layer 3 is lightweight because it is made of aluminum or aluminum alloy foil. The thickness of the first layer 3 is preferably 30 μm or more and 200 μm or less, and more preferably 55 μm or more and 100 μm or less. When the thickness of the first layer 3 is 30 μm or more and 200 μm or less, the radiant heat reflectivity of the first layer 3 is even more excellent. When the thickness of the first layer 3 is 55 μm or more and 100 μm or less, the radiant heat reflectivity of the first layer 3 is particularly excellent.

[0017] When the sheet for building material 1 is used, the first layer 3 is placed, for example, on the side exposed to flames 15 in the event of a fire. In this case, the fire-retardant effect of the sheet for building material 1 is further enhanced. (3)Second layer5 The second layer 5 contains inorganic fibers, such as rock wool and glass fibers.

[0018] The second layer 5 has the effect of slowing down heat transfer due to convection. Even if organic substances such as adhesives contained in the sheet for building material 1 decompose due to exposure to flames 15 during a fire, generating decomposition gases, the decomposition gases remain within the second layer 5, thereby suppressing swelling of the first layer 3.

[0019] The thickness of the second layer 5 is preferably 0.4 mm to 3.0 mm, more preferably 0.5 mm to 1.2 mm, and particularly preferably 0.7 mm to 1.0 mm. When the thickness of the second layer 5 is 0.4 mm to 3.0 mm, the first layer 3 is prevented from tearing during a fire. The reason for this effect is presumed to be as follows: The heat of combustion during a fire causes the interlayer adhesive, sheet adhesive, etc. to generate decomposition gas. The decomposition gas expands the first layer 3. If the first layer 3 expands excessively, the first layer 3 will tear. When the thickness of the second layer 5 is 0.4 mm to 3.0 mm, the decomposition gas diffuses within the second layer 5, thereby suppressing the expansion of the first layer 3. As a result, the first layer 3 is less likely to tear. When the thickness of the second layer 5 is 0.5 mm or more and 1.2 mm or less, the effect is even greater, and when the thickness of the second layer 5 is 0.7 mm or more and 1.0 mm or less, the effect is particularly high.

[0020] 2nd layer 5 1m 2 The mass per unit area of ​​the second layer 5 is preferably 50 g or more and 200 g or less. 2 When the mass per unit area is 50 g or more and 200 g or less, the amount of decomposition gas generated in the event of a fire is reduced, and as a result, the first layer 3 is less likely to break.

[0021] The second layer 5 is, for example, a glass fiber nonwoven fabric. When the second layer 5 is a glass fiber nonwoven fabric, the fire retardant effect is further enhanced. The glass fiber nonwoven fabric is, for example, formed into a sheet by papermaking or the like from short glass fibers. The glass fiber nonwoven fabric may contain a binder. Examples of the binder include synthetic resins. Examples of the synthetic resin include polyvinyl alcohol, acrylic resin, and vinyl acetate resin.

[0022] The glass fiber nonwoven fabric may contain an inorganic material. Examples of the inorganic material include other inorganic fibers and inorganic materials containing crystal water. Examples of the inorganic material containing crystal water include aluminum hydroxide.

[0023] The first layer 3 and the second layer 5 can be bonded together, for example, by an adhesive. The adhesive that bonds the first layer 3 and the second layer 5 together is referred to as an interlayer adhesive. Examples of interlayer adhesives include adhesives containing polyethylene resin, vinyl acetate resin, urethane resin, phenol resin, resorcinol resin, melamine resin, and acrylic resin.

[0024] A hot melt adhesive is preferred as the interlayer adhesive. EMMA (ethylene-methyl methacrylate copolymer resin) adhesive is preferred as the hot melt adhesive. When an EMMA adhesive is used, the adhesion between the first layer 3 and the second layer 5 is increased, and the amount of heat generated is reduced compared to when an interlayer adhesive containing an olefin-based synthetic resin is used. Alternatively, the first layer 3 and the second layer 5 may be fixed together with, for example, double-sided tape.

[0025] The mass of nonvolatile organic matter per unit area is defined as the organic mass. Nonvolatile organic matter means organic matter that does not volatilize at room temperature. The organic mass is measured by thermogravimetry (TG). The organic mass of the interlayer adhesive bonding the first layer 3 and the second layer 5 is 10 g / m 2 More than 50g / m 2 Preferably, it is 15 g / m or less. 2 More than 30g / m 2 It is more preferable that the organic content of the interlayer adhesive is 10 g / m or less. 2 More than 50g / m 2 When the organic content of the interlayer adhesive is 15 g / m or less, the amount of decomposition gas generated in the event of a fire is reduced. As a result, the first layer 3 is less likely to tear. 2 More than 30g / m 2 The above effect is even greater when the ratio is equal to or less than 1.

[0026] (4)Third layer 7 As shown in Fig. 2, the sheet for building material 1 may further include a third layer 7 in addition to the first layer 3 and the second layer 5. The third layer 7 is adjacent to the first layer 3. Examples of the third layer 7 include veneer, decorative film, wallpaper, and Japanese paper.

[0027] A veneer is a board made by thinly shaving off wood with a blade. The species of wood constituting the veneer is not particularly limited. Examples of species of wood constituting the veneer include conifers and broad-leaved trees. Examples of conifers include paulownia, cedar, larch, cypress, and yew. Examples of broad-leaved trees include cherry, zelkova, beech, sawtooth oak, and oak.

[0028] The thickness of the sliced ​​veneer is preferably 0.2 mm or more and 0.5 mm or less, and more preferably 0.25 mm or more and 0.4 mm or less. For example, an adhesive can be used to bond a veneer to the first layer 3. The adhesive used to bond the veneer is referred to as a veneer adhesive. Examples of veneer adhesives include acrylic resin adhesives, ethylene vinyl acetate resin adhesives, vinyl acetate resin adhesives, acrylic resin adhesives, polyvinyl alcohol adhesives, urethane resin adhesives, and epoxy resin adhesives.

[0029] The organic content of the veneer adhesive is 15g / m 2 More than 200g / m 2 Preferably, it is 25 g / m or less. 2 More than 100g / m 2 More preferably, it is 30 g / m or less. 2 More than 60g / m 2 It is particularly preferred that:

[0030] Alternatively, the veneer may be attached to the first layer 3 using double-sided tape or the like. The surface of the veneer may be painted to form a coating. A clear coat may be applied to the surface of the veneer. In this case, the durability of the veneer can be improved while preserving the wood grain of the veneer.

[0031] The paint used for painting the veneer can be selected arbitrarily, and examples of the paint used for painting the veneer include urethane resin paint, acrylic resin paint, and melamine resin paint. In the event of a fire, if the flame 15 reaches the veneer or the ambient temperature exceeds approximately 260°C, which is the ignition temperature of wood, for example, the veneer will burn and disappear.

[0032] The organic content of the sheet for building materials 1 is referred to as the sheet organic content. The sheet organic content is the sum of the organic content of the interlayer adhesive, the organic content of the veneer, the organic content of the veneer adhesive, and the organic content of the coating film of the veneer. When the sheet for building materials 1 does not contain an interlayer adhesive, the organic content of the interlayer adhesive is 0 g / m 2 In addition, when the sheet for building material 1 does not include a veneer, the organic amount of the veneer, the organic amount of the veneer adhesive, and the organic amount of the coating film of the veneer are each 0 g / m 2 is.

[0033] The sheet organic mass is 20g / m 2 More than 400g / m 2 Preferably, it is 30 g / m or less. 2 More than 300g / m 2 More preferably, it is 50 g / m or less. 2 More than 250g / m 2 It is particularly preferred that:

[0034] Sheet organic weight: 20g / m 2 More than 400g / m 2 When the organic content of the sheet is 30 g / m or less, the amount of decomposition gas generated in the event of a fire is reduced. 2 More than 300g / m 2 The above effect is even greater when the sheet organic weight is 50 g / m or less. 2 More than 250g / m 2 The above effect is particularly significant when:

[0035] 2. Building materials 11 As shown in FIGS. 3 to 5, a building material 11 of the present disclosure includes a combustible substrate 9 and a building material sheet 1. The building material sheet 1 is the same as that described above in the section "1. Building material sheet 1." The building material sheet 1 is attached to the combustible substrate 9 so that the second layer 5 faces the combustible substrate 9. The building material 11 may be manufactured in a factory or the like and transported to a construction site, or may be manufactured at the construction site.

[0036] 3 is composed of one combustible substrate 9 and one building material sheet 1. The building material sheet 1 is attached to one surface 9A of the combustible substrate 9. Surface 9A is, for example, the main surface of the plate-shaped combustible substrate 9.

[0037] The building material 11 shown in FIG. 4 is composed of one combustible substrate 9 and one building material sheet 1. The building material sheet 1 is attached to two surfaces 9A and 9B of the combustible substrate 9. Surface 9A is, for example, the main surface of the plate-shaped combustible substrate 9. Surface 9B is, for example, the end grain of the plate-shaped combustible substrate 9. The building material 11 shown in FIG. 4 can prevent combustion heat from penetrating into the combustible substrate 9 during a fire on both surfaces 9A and 9B.

[0038] The building material 11 shown in Figure 5 is composed of two combustible base materials 9, 9 and one building material sheet 1. The faces 9B of the two combustible base materials 9, 9 are butted together. The faces 9B are end grains. The part where the faces 9B of the two combustible base materials 9, 9 are butted together will be referred to as the butt joint 13 below. The building material sheet 1 is attached across the two combustible base materials 9, 9. The building material sheet 1 covers the butt joint 13. The building material 11 shown in Figure 5 can prevent combustion heat from entering through the butt joint 13 during a fire.

[0039] The first layer 3 is provided, for example, on the side exposed to flames 15 in the event of a fire. In this case, the fireproofing effect is further enhanced. Examples of the combustible substrate 9 include wood substrates, plastic substrates, etc. Examples of wood substrates include plywood, lumber, laminated veneer lumber (LVL), glued lumber, cross-laminated timber (CLT), etc. Examples of plastics that constitute the plastic substrate include polypropylene (PP), polyethylene (PE), vinyl chloride resin, etc.

[0040] Examples of tree species for the wood substrate include conifers, broad-leaved trees, etc. Conifers include cedar, larch, cypress, yew, etc. Broad-leaved trees include lauan, cherry, zelkova, beech, sawtooth oak, and oak.

[0041] It is possible to arbitrarily set the width, length, and thickness of the combustible substrate 9. For example, the combustible substrate 9 may be lauan plywood having a width of 910 mm, a length of 1820 mm, and a thickness of 12 mm. There is no particular limitation on the shape of the combustible substrate 9. Examples of the shape of the combustible substrate 9 include a plate shape, a prismatic shape, a cylindrical shape, a block shape, and an irregular shape.

[0042] The sheet for building material 1 may be attached to the entire surface of the combustible substrate 9, or to a part of the surface. The sheet for building material 1 can be attached to the combustible substrate 9 by, for example, adhering it with an adhesive, fixing it with double-sided tape, or fixing it with construction staples.

[0043] The adhesive used to attach the building material sheet 1 to the combustible substrate 9 is referred to as a sheet adhesive. Examples of sheet adhesives include ethylene vinyl acetate copolymer resin adhesives, vinyl acetate resin adhesives, acrylic resin adhesives, polyvinyl alcohol adhesives, urethane resin adhesives, epoxy resin adhesives, phenolic resin adhesives, resorcinol resin adhesives, and melamine resin adhesives.

[0044] The organic content of the sheet adhesive is 20 g / m 2 More than 400g / m 2 Preferably, it is 30 g / m or less. 2 More than 300g / m 2 More preferably, it is 50 g / m or less. 2 More than 250g / m 2 It is particularly preferred that:

[0045] The organic content of the sheet adhesive is 20g / m 2 More than 400g / m2 When the organic content of the sheet adhesive is 30 g / m or less, the amount of decomposition gas generated in the event of a fire is reduced. 2 More than 300g / m 2 The above effect is even greater when the organic content of the sheet adhesive is 50 g / m or less. 2 More than 250g / m 2 The above effect is particularly significant when:

[0046] The building material 11 can be used as, for example, a ceiling material, a wall material, a floor material, a pillar material, a beam material, or a door. The building material 11 may also be, for example, a part of furniture. Examples of furniture include a chair and a desk.

[0047] 3. Effects of the building material sheet 1 and the building material 11 (1A) The building material sheet 1 has a first layer 3 with a tensile strength of 100 N / m 2 As a result of the above, the fireproofing effect is high. The reason for the high fireproofing effect is presumed to be as follows. As shown in Figure 6, when the building material 11 is heated by flames 15 during a fire, the synthetic resin contained in the second layer 5, the synthetic resin contained in the interlayer adhesive, the synthetic resin contained in the sheet adhesive, etc. decomposes, generating gas. The generated gas causes the building material sheet 1 to expand, applying tension to the first layer 3. If the tension causes the first layer 3 to break, radiant heat will penetrate into the building material sheet 1, causing the flammable base material 9 to ignite. The tensile strength of the first layer 3 is 100 N / m 2 For the above reasons, even if tension is applied to the first layer 3, the first layer 3 is unlikely to tear. As a result, the sheet for building material 1 has a high fire-retardant effect.

[0048] (1B) The second layer 5 is, for example, a glass fiber nonwoven fabric. In this case, the fire-retardant effect of the sheet for building material 1 is further enhanced. (1C) The aluminum or aluminum alloy constituting the foil of the first layer 3 is, for example, H material. H material has high tensile strength. Therefore, when the aluminum or aluminum alloy constituting the foil of the first layer 3 is H material, the fire retardant effect of the sheet for building material 1 is even higher.

[0049] (1D) The first layer 3 is made of, for example, an aluminum alloy foil containing Mn and Mg. The aluminum alloy foil containing Mn and Mg has high tensile strength. Therefore, when the first layer 3 is made of an aluminum alloy foil containing Mn and Mg, the fire retardant effect of the building material sheet 1 is further enhanced.

[0050] (1E) The first layer 3 is made of, for example, an aluminum alloy foil containing 0.5% to 1.5% by mass of Mn and 0.5% to 2% by mass of Mg. Aluminum alloy foil containing 0.5% to 1.5% by mass of Mn and 0.5% to 2% by mass of Mg has high tensile strength. Therefore, when the first layer 3 is made of an aluminum alloy foil containing 0.5% to 1.5% by mass of Mn and 0.5% to 2% by mass of Mg, the fire-retardant effect of the sheet for building material 1 is further enhanced.

[0051] (1F) The building material 11 comprises a combustible substrate 9 and a sheet for building material 1. The sheet for building material 1 is attached to the combustible substrate 9 so that the second layer 5 faces the combustible substrate 9. The sheet for building material 1 exerts at least some of the effects (1A) to (1E) above, and therefore the building material 11 has high non-combustibility.

[0052] 4. Working Example (4-1) Manufacturing of test specimens S1 to S6 As shown in Table 1, specimens S1 to S6 corresponding to building material 11 were manufactured.

[0053] [Table 1]

[0054] As shown in Fig. 7, each of specimens S1 to S6 included a combustible base material 9 and a sheet for building material 1. In each of specimens S1 to S6, the sheet for building material 1 was attached to the combustible base material 9 so that the second layer 5 faced the combustible base material 9. In each of specimens S1 to S6, the sheet for building material 1 was attached to only one surface of the combustible base material 9.

[0055] In all of the specimens S1 to S6, the dimensions of the combustible substrate 9 were 99 mm in length, 99 mm in width, and 30 mm in thickness. In the specimens S1 to S6, the material of the combustible substrate 9 was as shown in Table 1.

[0056] In each of the specimens S1 to S6, the sheet for building material 1 had a first layer 3, a second layer 5, and a third layer . In all of specimens S1 to S6, the first layer 3 was an aluminum alloy foil. The foil thickness was 50 μm in all of specimens S1 to S6. For specimens S1 to S6, the alloy number of the aluminum alloy, the mass ratio of each component contained in the aluminum alloy, whether the aluminum alloy was H material or O material, and the tensile strength of the first layer 3 were as shown in Table 1.

[0057] In all of the specimens S1 to S6, the second layer 5 was made of the same glass fiber nonwoven fabric. The thickness of the glass fiber nonwoven fabric was 0.8 mm. The mass per unit area of ​​the glass fiber nonwoven fabric was 110 g / m 2 The composition of the glass fiber nonwoven fabric was 88% by mass of glass fiber and 12% by mass of polyvinyl alcohol, which was a binder.

[0058] In all of the specimens S1 to S6, the third layer 7 was a veneer. The materials and thicknesses of the veneers in the specimens S1 to S6 are as shown in Table 1. In all of specimens S1 to S6, the first layer 3 was bonded to the second layer 5 by an interlayer adhesive. The composition and application amount of the interlayer adhesive in specimens S1 to S6 were as shown in Table 1. The interlayer adhesive was a hot melt adhesive that was solid at room temperature.

[0059] In all of the test specimens S1 to S6, the building material sheet 1 was adhered to the combustible substrate 9 by a sheet adhesive. The composition and application amount of the sheet adhesive for the test specimens S1 to S6 were as shown in Table 1. Of the sheet adhesives, the EVA adhesive was liquid and had a non-volatile content of 50%. Of the sheet adhesives, the acrylic adhesive was a hot melt adhesive that was solid at room temperature. For specimens S1 to S6, the organic content of the interlayer adhesive was 30 g / m 2 The organic mass of the veneer is 80g / m 2 The organic content of the veneer adhesive is 30 g / m 2 The sheet organic weight is 45g / m 2 The organic content of the sheet adhesive is 50 g / m 2 It was.

[0060] (4-2) Measurement of total heat release and maximum heat release rate Using the cone calorimeter method specified in ISO5660-1, 50kW / m for specimens S1 to S6 2 The total heat release rate and heat release rate were measured when the sample was heated for 20 minutes at a radiation intensity of 1000 kJ / s.

[0061] The measurement results for specimen S1 are shown in Figure 8A. The measurement results for specimen S2 are shown in Figure 8B. The measurement results for specimen S3 are shown in Figure 9A. The measurement results for specimen S4 are shown in Figure 9B. The measurement results for specimen S5 are shown in Figure 10A. The measurement results for specimen S6 are shown in Figure 10B.

[0062] In the specimens S1 to S2 and S4 to S6, the total heat generation amount and the maximum heat generation rate were small. In the specimen S3, the total heat generation amount and the maximum heat generation rate were large. In the specimens S1 to S2 and S4 to S6, the tensile strength of the first layer 3 was 100 N / m 2In the specimen S3, the tensile strength of the first layer 3 was 100 N / m 2 The evaluation results of this example showed that the tensile strength of the first layer 3 was less than 100 N / m 2 The above facts indicate that the fire-retardant effect is enhanced.

[0063] Furthermore, after the test, holes were formed in the first layer 3 of specimen S3. After the test, no holes were formed in the first layer 3 of specimens S1 to S2 and S4 to S6. The reason why the total heat generation amount and maximum heat generation rate were large in specimen S3 is presumably because the gas generated by heating applied tension to the first layer 3, causing the first layer 3 to rupture and form holes, which allowed radiant heat to enter through the holes and ignite the combustible base material 9.

[0064] The reason why the total heat generation amount and maximum heat generation rate were small for specimens S1 to S2 and S4 to S6 is presumably because the first layer 3 did not break due to its high tensile strength, even though tension was applied to the first layer 3 by the gas generated by heating.

[0065] 5. Other Embodiments Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments and can be implemented in various modified forms.

[0066] (5-1) The sheet for building material 1 may further include another layer between the first layer 3 and the second layer 5. (5-2) The building material 11 may further include another layer between the combustible substrate 9 and the sheet 1 for building material.

[0067] (5-3) The sheet for building material 1 in FIGS. 3 to 5 may further include a third layer 7, similar to the sheet for building material 1 shown in FIG. (5-4) The function of one component in each of the above embodiments may be shared among multiple components, or the functions of multiple components may be performed by one component. Also, part of the configuration of each of the above embodiments may be omitted. Furthermore, at least part of the configuration of each of the above embodiments may be added to or substituted for the configuration of another of the above embodiments.

[0068] (5-5) In addition to the above-mentioned building material sheet 1 and building material 11, the present disclosure can also be realized in various forms, such as a system having the building material sheet 1 or building material 11 as a component, a method for manufacturing the building material sheet 1, and a method for manufacturing the building material 11. [Explanation of symbols]

[0069] 1...sheet for building material, 3...first layer, 5...second layer, 7...third layer, 9...flammable substrate, 9A, 9B...surface, 11...building material, 13...butt joint, 15...flame

Claims

1. A building material comprising a flammable substrate and a building material sheet, The building material sheet is a first layer made of aluminum or aluminum alloy foil; a second layer including inorganic fibers; Equipped with The tensile strength of the first layer is 100 N / m ２ That's all, The building material sheet is attached to the combustible substrate so that the second layer faces the combustible substrate. building materials.

2. 2. The building material of claim 1, the second layer is a glass fiber nonwoven fabric; building materials.

3. 3. The building material according to claim 1 or 2, The aluminum or aluminum alloy is an H material. building materials.

4. The building material according to any one of claims 1 to 3, the first layer is made of a foil of the aluminum alloy containing Mn and Mg; building materials.

5. 5. The building material according to claim 4, The aluminum alloy contains 0.5% by mass or more and 1.5% by mass or less of Mn and 0.5% by mass or more and 2% by mass or less of Mg. building materials.

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