Self-extinguishing sheets and self-extinguishing system walls

Abstract

To provide a self-extinguishing sheet and a self-extinguishing system wall that can be attached to a wall, can be reattached multiple times, and can be easily attached and removed by anyone. [Solution] A self-extinguishing sheet 1 that can be attached to a wall surface by magnetic attraction, wherein a magnetic layer 12 is formed on both sides of the fire extinguishing agent layer 11. The magnetic layer 12 is made of sheet-shaped steel or sheet-shaped ferritic stainless steel and has multiple through holes. When a fire occurs, the heat of the fire extinguishing agent layer 11 causes an aerosol containing the fire extinguishing agent component to be ejected from the multiple through holes in the magnetic layer 12, and the fire can be extinguished by the radical reaction of the fire extinguishing agent component. The presence of the magnetic layer 12 makes it easy to attach and detach the self-extinguishing sheet 1 to magnetic walls, etc.

Description

[Technical Field]

[0001] The present invention relates to a self-extinguishing sheet and a self-extinguishing system wall. More specifically, the present invention relates to a self-extinguishing sheet and a self-extinguishing system wall that are detachably attached to a wall surface and perform initial fire extinguishing by automatically spraying an extinguishing agent as aerosol when a fire occurs. [Background Art]

[0002] The importance of initial fire extinguishing in the event of a fire has been conventionally recognized. In recent years, however, the number of cases where intense fires that were not originally expected occur in public facilities, train carriages and the like has been increasing, which has become a social problem. Under such circumstances, for example, self-extinguishing sheets, which automatically generate aerosol by the heat of fire to extinguish fires as disclosed in Patent Document 1 and Patent Document 2, have attracted attention. [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2021-137346 [Patent Document 2] Japanese Unexamined Patent Application Publication No. 2021-137445 [Disclosure of the Invention] [Problems to be Solved by the Invention]

[0004] The above-mentioned self-extinguishing sheet needs to be replaced periodically to cope with the aged deterioration of the extinguishing agent, which is its main component. However, since the sheet is adhered to a wall surface or the like with an adhesive, it must be carefully peeled off during replacement so as not to stain the wall surface. After peeling, it is necessary to wipe off the adhesive remaining on the wall surface before attaching a new self-extinguishing sheet, which causes a problem in workability. In addition, since the sheet is attached with an adhesive, repositioning is not allowed, which requires caution in selecting the installation location and performing the installation work, resulting in a large work burden. Therefore, in some cases, specialized craftsmen are required, which also causes a problem in terms of cost.

[0005] This invention has been made in view of the above circumstances, and aims to provide a self-extinguishing sheet and a self-extinguishing system wall that can be reattached by utilizing magnetic force and can be easily installed by anyone. [Means for solving the problem]

[0006] The present invention takes the following measures to solve the above problems. The symbols in parentheses attached to each component in this section ("Means for Solving the Problems") are for reference purposes only to indicate the correspondence with the specific means described in the embodiments later, and the present invention is not limited to these.

[0007] One aspect of the present invention is a fire extinguishing sheet that extinguishes a fire by generating an aerosol, comprising a fire extinguishing agent layer (11) and magnetic layers (12) provided on both sides of the fire extinguishing agent layer (11), wherein the magnetic layers (12) are made of sheet-shaped steel or sheet-shaped ferritic stainless steel and have a plurality of through holes.

[0008] In another aspect of the present invention, in a self-extinguishing sheet, the magnetic layer (12) has a design layer (13) on the side opposite to the fire extinguishing agent layer (11).

[0009] In another aspect of the present invention, the self-extinguishing sheet has a resin layer (14) between the magnetic layer (12) and the design layer (13).

[0010] Another aspect of the present invention is a self-extinguishing sheet in which the magnetic layer (12) comprises a mixture of at least fine powder of a soft magnetic material and an organic polymer elastomer that acts as a binder.

[0011] Another aspect of the present invention is a self-extinguishing sheet in which the magnetic layer (12) comprises a mixture of at least fine powder of a hard magnetic material and an organic polymer elastomer that acts as a binder, and at least one surface thereof is magnetized.

[0012] Another aspect of the present invention involves attaching a self-extinguishing sheet (20) and a wall surface (30) formed on the surface of a wall material (40) to a self-extinguishing system wall by magnetic force.

[0013] Another aspect of the present invention is a self-extinguishing system wall in which at least one of the wall surface (30) and the wall material (40) is a magnetized hard magnetic material.

[0014] Another aspect of the present invention is a self-extinguishing system wall in which at least one of the wall surface (30) and the wall material (40) is a magnetic material.

[0015] Another aspect of the present invention is a self-extinguishing system wall in which the wall surface (30) is a fire-resistant panel or a fire-resistant sheet.

[0016] The main effects of the embodiments of the present invention are described below.

[0017] In the self-extinguishing sheet, magnetic layers (12) are formed on both sides of the fire extinguishing agent layer (11). The magnetic layer (12) is made of sheet-shaped steel or sheet-shaped ferritic stainless steel and has multiple through holes. When a fire occurs, the heat of the fire extinguishing agent layer (11) causes an aerosol containing the fire extinguishing agent component to be ejected from the multiple through holes in the magnetic layer (12), and the fire can be extinguished by the radical reaction of the fire extinguishing agent component. By having a magnetic layer (12), the self-extinguishing sheet can be easily attached by magnetic force to a magnetic wall composed of a wall surface (30) and wall material (40), and it can also be easily removed, allowing for repeated use. Furthermore, by covering the fire extinguishing agent layer (11), This technology suppresses the rate of deterioration of the fire extinguishing agent while simultaneously improving the durability of the self-extinguishing sheet. A design layer (13) is formed on the other side of the magnetic layer (12), providing a design element while also allowing for printing of information such as the next replacement date and handling precautions. By imparting fire resistance to the wall surface (30) and the wall material (40), and by installing the self-extinguishing sheet (20) and the fire-resistant panel (31) in combination, it becomes possible to have both a fire extinguishing function and a fire-resistant function, and damage when a fire breaks out can be minimized. [Effects of the Invention]

[0018] According to the present invention, by adding a magnetic layer to a self-extinguishing sheet, reattachment to a wall surface is enabled, anyone can easily perform installation work, and there are provided a self-extinguishing sheet and a self-extinguishing system wall that are excellent in durability and have improved disaster prevention performance. [Brief Description of Drawings]

[0019] [Figure 1] It is a cross-sectional view of the self-extinguishing sheet according to the first embodiment. [Figure 2] It is a cross-sectional view of the self-extinguishing sheet according to the second embodiment. [Figure 3] It is a cross-sectional view of the self-extinguishing sheet according to the third embodiment. [Figure 4] It is a schematic diagram of the self-extinguishing system wall according to the fourth embodiment. [Figure 5] It is a schematic view of the self-extinguishing system wall according to the fourth embodiment. [Mode for Carrying Out the Invention]

[0020] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the following embodiments.

[0021] [First Embodiment] Fig. 1 is a cross-sectional view of the self-extinguishing sheet according to the first embodiment. The self-extinguishing sheet 1 includes an extinguishing agent layer 11 and magnetic layers 12 provided on both surfaces of the extinguishing agent layer 11.

[0022] The magnetic layer 15 is mainly composed of magnetic material powder and organic polymer elastomer. The magnetic material powders used are soft magnetic material powders, and include ferromagnetic materials with low coercivity and high permeability (iron powder, magnetic stainless steel powder, Sendust powder, etc.) and ferrimagnetic materials with low coercivity and high permeability (soft ferrites such as manganese zinc ferrite powder, nickel zinc ferrite powder, magnetite powder = iron(II,III) oxide powder, etc.). Mixtures of both can also be used.

[0023] Examples of organic polymer elastomers include chlorinated polyethylene elastomers, chlorosulfonated polyethylene elastomers, ethylene vinyl acetate copolymer elastomers, ethylene ethyl acrylate elastomers, ethylene propylene elastomers, and urethane-based elastomers. Furthermore, mixtures of these elastomers and mixtures of these elastomers with plastomers (plastics) can be used as appropriate depending on the desired physical properties.

[0024] The magnetic layer 12 is formed from these mixtures into a sheet by a molding method such as rolling or extrusion, and is magnetically attached to the wall surface of a magnetized hard magnetic material.

[0025] The magnetic layer 12 may be a sheet of steel or a sheet of ferritic stainless steel. The steel or ferritic stainless steel acts as a soft magnetic material and will magnetically adhere to the magnetized hard magnetic wall or the like.

[0026] The magnetic layer 12 may be a magnetic sheet. Using a magnetic sheet makes it possible to magnetically attach not only to magnetized hard magnetic walls but also to soft magnetic walls. The magnetic sheet is a flexible sheet-like magnet, and its surface is magnetized with alternating N and S poles in a striped pattern, having magnetization lines at a constant pitch. A thickness of 80 μm or more is preferable. If the thickness is less than 80 μm, sufficient magnetic attraction force cannot be expected.

[0027] Such flexible sheet-like magnets are manufactured by mixing a fine powder of a hard magnetic material (for example, ferrite-based magnetic materials such as barium ferrite and strontium ferrite, or rare-earth magnetic materials such as samarium-cobalt-based magnets, neodymium-iron-boron-based magnets, etc.) with a small amount of organic polymer elastomer that acts as a binder (for example, chlorinated polyethylene, chlorosulfonated polyethylene, ethylene-vinyl acetate copolymer, ethylene-propylene rubber, nitrile rubber, acrylic rubber, chloroprene rubber), forming the mixture into a sheet by a molding method such as rolling or extrusion, and then magnetizing it. Preferably, the magnetization pitch of the magnet sheet is 1.0 mm or more and 7.0 mm or less.

[0028] The fire extinguishing agent layer 11 is formed into a sheet by mixing an aerosol fire extinguishing agent manufactured by Yamato Protec Co., Ltd. with a binder and other materials. The fire extinguishing agent mainly consists of an oxidizing agent and potassium salt. When a fire occurs, the heat causes the oxidizing agent to burn, reacting with the potassium salt and releasing an aerosol. The potassium radical reaction of the aerosol suppresses the chain reaction of combustion in the fire, leading to its extinguishing. The fire extinguishing agent layer 11 and the magnetic layer 12 are formed via an adhesive layer.

[0029] The Self-Extinguishing Sheet 1 can be installed on the entire surface of a wall, or selectively in areas with a high probability of ignition or in areas where significant damage is expected if ignition occurs. Examples of areas with a high probability of ignition include kitchens, factories, hazardous materials storage areas, electrical panels, and secondary battery installation areas. Examples of areas where significant damage is expected include public facilities such as hospitals and schools, corporate offices, and public transportation such as trains and airplanes. Because the Self-Extinguishing Sheet 1 is a reusable sheet, anyone can install it selectively and efficiently in these locations. Furthermore, even in the case of temporary events, its reusability allows for unprecedented services such as rental. The magnetic layer 12 and the fire extinguishing agent layer 11 may be formed by applying the fire extinguishing agent to the magnetic layer 12, or vice versa.

[0030] The magnetic layer 12 covers the fire extinguishing agent layer 11, thereby blocking contact with the outside air and preventing deterioration of the fire extinguishing agent layer 11, which is expected to improve the durability of the self-extinguishing sheet 1. The magnetic layer 12 preferably has moderate thermal meltability. When a fire occurs, the heat melts the magnetic layer 12, exposing the fire extinguishing agent layer 11 and causing it to release an aerosol to extinguish the fire. Steel and ferritic stainless steel are fire-resistant, so as they are, the fire extinguishing agent layer cannot be exposed during a fire, and therefore an aerosol cannot be released. Therefore, by making it into a sheet with multiple perforations, such as perforated metal, it becomes possible to expose the fire extinguishing agent layer and generate an aerosol.

[0031] [Second Embodiment] Figure 2 is a cross-sectional view of the self-extinguishing sheet 2 of the second embodiment. The self-extinguishing sheet 2 has a fire extinguishing agent layer 11, magnetic layers 12 on both sides of the fire extinguishing agent layer 11, and design layers 13 on the side of the magnetic layer 12 opposite to the fire extinguishing agent layer 11. The magnetic layer 12 and the design layer 13 may be formed via an adhesive layer, or they may be formed by coating the design layer 13 onto the magnetic layer 12. The other configurations are the same as in the first embodiment. The design layer 13 covers the magnetic layer 12, thereby blocking contact between the fire extinguishing agent layer 11 and the outside air, which is expected to prevent deterioration of the fire extinguishing agent layer 11 and improve the durability of the self-extinguishing sheet 2.

[0032] The design layer 13 is a film-like decorative material and may be an ink-receiving layer on which a picture or pattern is printed. The ink-receiving layer can be made of a thermoplastic resin such as polyvinyl chloride resin or polyethylene resin, or a thin coated paper. Ink is fixed to this ink-receiving layer by printing according to the application. Examples of printing methods include offset printing, letterpress printing, inkjet printing, and thermal transfer printing.

[0033] By applying a design layer 13, it is expected that the design will harmonize with the surroundings and that the location of the self-extinguishing sheet 2 will be clearly indicated. In addition, it is expected that the handling and management will be improved by printing precautions and expiration dates.

[0034] Furthermore, by having the design layer 13 on both sides, it is possible to apply different designs to the front and back. Since it is attached to a magnetic wall surface by magnetic force, it can be easily flipped over, allowing the design to be changed according to preference.

[0035] The installation location for the self-extinguishing sheet 2 is the same as in the first embodiment.

[0036] [Third Embodiment] Figure 3 is a cross-sectional view of the self-extinguishing sheet 3 of the third embodiment. The self-extinguishing sheet 3 has a fire extinguishing agent layer 11, magnetic layers 12 on both sides of the fire extinguishing agent layer 11, resin layers 14 on the side of the magnetic layer 12 opposite to the fire extinguishing agent layer 11, and design layers 13 on the side of the resin layer 14 opposite to the magnetic layer 12. The resin layer 14 and the magnetic layer 12 may be formed via an adhesive layer, or the resin layer 14 may be applied to the magnetic layer 12, or vice versa. The resin layer 14 and the design layer 13 may be formed via an adhesive layer, or the design layer 13 may be applied to the resin layer 14. The other configurations are the same as in the first and second embodiments. The resin layer 14 covers the magnetic layer 12, thereby blocking contact between the fire extinguishing agent layer 11 and the outside air, which is expected to prevent deterioration of the fire extinguishing agent layer 11 and improve the durability of the self-extinguishing sheet 3.

[0037] The installation location for the self-extinguishing sheet 3 is the same as in the first embodiment.

[0038] [Fourth Embodiment] Figure 4 is a schematic diagram of the self-extinguishing system wall 6 of the fourth embodiment. The self-extinguishing system wall 6 comprises a self-extinguishing sheet 20, a wall material 40, and a wall surface 30. The self-extinguishing sheet 20 can be one of the first, second, or third embodiments.

[0039] The wall surface 30 is in the form of a sheet or panel and is formed on the surface of the wall material 40. The wall surface 30 is fastened and fixed to the wall material 40 by nails, screws, adhesive, staples, magnets, etc.

[0040] The wall surface 30 preferably has excellent fire resistance and preferably has non-combustible properties that satisfy the following conditions in a heat generation test using a cone calorimeter tester in accordance with ISO 5660-1 and the fire prevention and performance evaluation standards based on Article 2, Item 9 of the Building Standards Act and Article 108-2 of the Enforcement Order of the Building Standards Act: [1] the total heat generation for 20 minutes after the start of heating is 8 MJ / m2 or less, [2] the maximum heat generation rate does not exceed 200 KW / m2 for 10 seconds or more continuously after the start of heating, and [3] there are no cracks or holes that are harmful to fire prevention for 20 minutes after the start of heating.

[0041] The wall material 40 is made of plywood, concrete, light metal, or gypsum board. Among these, gypsum board is a base material for the wall surface, and is typically sized to 1800mm x 900mm with a thickness of 12.5mm to 15mm. Gypsum board 10 with a thickness within this range has excellent fire resistance and is non-combustible on its own, making it suitable as wall material 40. Alternatively, materials such as Dylight (a registered trademark of Daiken Corporation) or calcium silicate board may be used instead of gypsum board.

[0042] At least one of the wall surface 30 and the wall material 40 is magnetic. This allows the self-extinguishing sheet 20 to be attached to the wall surface 30 by magnetic force with the magnetic layer of the sheet, and functions as a self-extinguishing system wall that can be easily reattached.

[0043] Specifically, at least one of the wall surface 30 and the wall material 40 may have magnetized hard magnetism. In this case, by magnetically attaching to the magnetic layer of the self-extinguishing sheet 20, it functions as a self-extinguishing system wall that can be easily reattached.

[0044] In addition, at least one of the wall surface 30 or the wall material 40 may have soft magnetism. In this case, if the magnetic layer of the self-extinguishing sheet 20 is magnetized hard magnetism, it can be magnetically attached to function as a self-extinguishing system wall that is easy to reattach.

[0045] Furthermore, the wall surface 30 may have hard magnetism and the wall material 40 may have soft magnetism. In this case, the yoke effect of the wall material 40 strengthens the magnetic force of the wall surface 30, making it possible to magnetically attach the self-extinguishing sheet 20 more firmly.

[0046] Figure 5 is a schematic diagram of the self-extinguishing system wall 6 of the fourth embodiment. The self-extinguishing system wall 6 is constructed by attaching a self-extinguishing sheet 20 to a kitchen wall made up of wall material 40 and wall surface 30, and attaching a fire-resistant panel 31 near the stove. As in this example, it is possible to select a kitchen with a high risk of fire and attach the necessary number of self-extinguishing sheets 20 there. Furthermore, it is possible to combine them with fire-resistant panels as needed, change the attachment position, and increase or decrease the number of sheets, allowing for a high degree of flexibility in operation.

[0047] The example above shows it installed in a kitchen, but it is not limited to that. Other examples include factories, hazardous materials storage facilities, electrical panels, secondary battery installation locations, public facilities such as hospitals and schools, corporate offices, and public transportation such as trains and airplanes.

[0048] While embodiments of the present invention have been described above, the embodiments disclosed above are merely illustrative, and the scope of the present invention is not limited to these embodiments. The scope of the present invention is indicated by the claims and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0049] For example, in the above-described embodiment, a self-extinguishing system wall is described as a wall, but it is not limited to walls that partition a room vertically; it may also be a ceiling or a floor, as it may be a wall that partitions a room horizontally. [Industrial applicability]

[0050] This self-extinguishing sheet, which can be attached to walls using magnetic attraction, and the self-extinguishing system wall, can be widely used. [Explanation of Symbols]

[0051] 1. Self-extinguishing sheet 2 Self-extinguishing sheet 3 Self-extinguishing sheet 6 Self-extinguishing system wall 11. Fire extinguishing agent layer 12 Magnetic layer 13. Design Layer 14 resin layer 20 Self-extinguishing sheets 30 Wall surface 31 Fire-resistant panels 40 Wall materials

Claims

1. A self-extinguishing fire sheet that extinguishes fires by generating aerosols, comprising a fire extinguishing agent layer and magnetic layers provided on both sides of the fire extinguishing agent layer, wherein the magnetic layers are made of sheet-shaped steel or sheet-shaped ferritic stainless steel and have multiple through holes.

2. The self-extinguishing sheet according to claim 1, having a resin layer between the magnetic layer and the design layer.

3. A self-extinguishing wall system characterized by attaching the self-extinguishing sheet described in claim 1 or claim 2 to a wall surface formed on the surface of a wall material by magnetic force.

4. The self-extinguishing system wall according to claim 3, wherein at least one of the wall surface and the wall material is a magnetized hard magnetic material.

5. The self-extinguishing system wall according to claim 4, wherein the wall surface is a fire-resistant panel or a fire-resistant sheet.

6. A self-extinguishing wall system characterized by attaching the self-extinguishing sheet described in claim 5 to a wall surface formed on the surface of a wall material by magnetic force.

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