Self-extinguishing sheets and self-extinguishing system walls

Abstract

The present invention provides a self-extinguishing sheet and a self-extinguishing system wall that can be attached to a wall surface, can be reattached multiple times, and can be easily attached and removed by anyone. [Solution] The device comprises a fire extinguishing agent layer 11, a magnetic layer 12 provided on one side of the fire extinguishing agent layer 11, a first design layer 13a provided on the side of the fire extinguishing agent layer 11 opposite to the magnetic layer 12, and a second design layer 13b provided on the side of the magnetic layer 12 opposite to the fire extinguishing agent layer 11. The magnetic layer 12 has multiple through holes and is heat resistant. When a fire occurs, if the magnetic layer 12 is magnetically attached so that it is on the fire side of the fire extinguishing agent layer 11, the second design layer 13b melts first, exposing the magnetic layer 12. Next, the fire extinguishing agent layer 11 on the wall side is heated through the through holes in the magnetic layer 12, generating an aerosol, which is then ejected through the through holes in the magnetic layer 12 to extinguish the fire.

Description

Technical Field

[0001] The present invention relates to a self-extinguishing sheet and a self-extinguishing system wall. More specifically, it 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 a fire extinguishing agent in the form of an aerosol when a fire occurs.

Background Art

[0002] Conventionally, the importance of initial fire extinguishing at the time of a fire has been understood. However, in recent years, there has been an increasing number of cases where extremely fierce fires that were not originally anticipated occur in public facilities, trains, etc., which has become a social problem. Under such circumstances, for example, self-extinguishing sheets that automatically generate an aerosol by the heat of a fire and extinguish the fire, as shown in Patent Document 1 and Patent Document 2, have attracted attention.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Disclosure of the Invention

Problems to be Solved by the Invention

[0004] In order to cope with the aging deterioration of the fire extinguishing agent, which is the main component of the above-mentioned self-extinguishing sheet, it is necessary to replace it regularly. However, since it is adhered to a wall surface or the like with an adhesive, it is necessary to carefully peel it off so that the wall surface is not damaged during replacement. After peeling, it is necessary to wipe off the adhesive remaining on the wall surface and then attach a new self-extinguishing sheet, so there are problems with workability. Also, when attaching, due to adhesion with an adhesive, it cannot be reattached, and careful consideration is required for the selection of the installation location and the installation work, resulting in a large work burden. For this reason, in some cases, a professional craftsman is required, and there are also problems 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 (1) that extinguishes a fire by generating an aerosol, comprising a fire extinguishing agent layer (11), a magnetic layer (12) provided on one side of the fire extinguishing agent layer (11), a first design layer (13a) provided on the side of the fire extinguishing agent layer (11) opposite to the magnetic layer (12), and a second design layer (13b) provided on the side of the magnetic layer (12) opposite to the fire extinguishing agent layer (11), wherein the magnetic layer (12) has a plurality of through holes.

[0008] In another aspect of the present invention, the magnetic layer (12) is heat resistant.

[0009] 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.

[0010] Another aspect of the present invention is a self-extinguishing sheet in which the magnetic layer (12) is made of sheet-shaped steel or sheet-shaped ferritic stainless steel.

[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) to a wall surface (30) formed on the surface of a wall material (40) in a self-extinguishing system wall (6) 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. In the self-extinguishing sheet, a magnetic layer (12) is formed on one side of the fire extinguishing agent layer (11). When a fire occurs, the heat generated by the fire extinguishing agent layer (11) causes an aerosol containing the fire extinguishing agent component to be ejected, and the fire can be extinguished by the radical reaction of the fire extinguishing agent component. The presence of a magnetic layer (12) allows the self-extinguishing sheet to 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, enabling repeated use. Furthermore, by covering the side of the fire extinguishing agent layer (11) opposite to the magnetic layer (12) with the first design layer (13a), the rate of deterioration of the fire extinguishing agent is suppressed, while simultaneously improving the durability of the self-extinguishing sheet. A second design layer (13b) 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. When the magnetic layer (12) has a plurality of through-holes and is magnetically attached so that the magnetic layer (12) is located closer to the fire side than the fire extinguishing agent layer (11) in case of a fire, first, the second design layer (13b) thermally melts and the magnetic layer (12) is exposed. When the magnetic layer (12) is exposed, the fire extinguishing agent layer (11) located on the wall surface (30) side through the through-holes of the magnetic layer (12) is heated, generating aerosol, and the aerosol is ejected through the through-holes of the magnetic layer (12) to extinguish the fire. Since the magnetic layer (12) has heat resistance, the self-extinguishing sheet can maintain its magnetic attachment to the wall surface (30) in case of a fire. By providing fire resistance to the wall surface (30) and the wall material (40) and combining and attaching the self-extinguishing sheet (20) and the fire-resistant panel (31), it becomes possible to have both a fire extinguishing function and a fire-resistant function, minimizing damage in case of a fire.

Advantages of the Invention

[0017] According to the present invention, by adding a magnetic layer to the self-extinguishing sheet, it becomes possible to reattach it to the wall surface, enabling anyone to easily perform the attachment work. A self-extinguishing sheet and a self-extinguishing system wall are provided that are excellent in durability and have improved disaster prevention performance.

Brief Description of the Drawings

[0018] [Figure 1] It is a cross-sectional view of the self-extinguishing sheet of the first embodiment. [Figure 2] It is a cross-sectional view of the self-extinguishing sheet of the second embodiment. [Figure 3] It is a schematic diagram of the self-extinguishing system wall of the third embodiment. [Figure 4] It is a schematic view of the self-extinguishing system wall of the third embodiment.

Modes for Carrying Out the Invention

[0019] 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.

[0020] 〔First Embodiment〕 FIG. 1 is a cross-sectional view of a self-extinguishing sheet according to the first embodiment. The self-extinguishing sheet 1 has an extinguishing agent layer 11, a magnetic layer 12 on one side of the extinguishing agent layer 11, a design layer 13a on the side of the extinguishing agent layer 11 opposite to the magnetic layer 12, and a design layer 13b on the side of the magnetic layer 12 opposite to the extinguishing agent layer 11.

[0021] The magnetic layer 12 is mainly composed of magnetic material powder and an organic polymer elastomer. As the magnetic material powder, soft magnetic material powder is used. Among ferromagnetic materials, there are ferromagnetic materials with low coercive force and high permeability (such as iron powder, magnetic stainless steel powder, Sendust powder, etc.), and among ferrimagnetic materials, there are ferromagnetic materials with low coercive force and high permeability (such as manganese zinc ferrite powder, nickel zinc ferrite powder, magnetite powder = iron sesquioxide powder, etc.) which are soft ferrites. Also, mixtures of both can be used.

[0022] Examples of the organic polymer elastomer include chlorinated polyethylene elastomer, chlorosulfonated polyethylene elastomer, ethylene vinyl acetate copolymer elastomer, ethylene ethyl acrylate elastomer, ethylene propylene elastomer, urethane-based elastomer, etc. Also, depending on the desired physical properties, mixtures of these and mixtures of these with plastomers (plastics) can be appropriately used.

[0023] The magnetic layer 12 is formed into a sheet shape by a molding method such as rolling or extrusion using these mixtures, and will be magnetically attached to a magnetized hard magnetic wall surface or the like.

[0024] The magnetic layer 12 may be sheet-shaped steel or sheet-shaped ferritic stainless steel. Steel and ferritic stainless steel act as soft magnetic materials and will be magnetically attached to a magnetized hard magnetic wall surface or the like.

[0025] 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.

[0026] 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.

[0027] The design layers 13a and 13b are film-like decorative materials and may be ink-receiving layers on which patterns or designs are printed. The ink-receiving layer can be made of thermoplastic resins such as polyvinyl chloride resin or polyethylene resin, or 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.

[0028] By applying designs using design layers 13a and 13b, it is expected that the design will harmonize with the surroundings and that the location of the self-extinguishing sheet 1 will be clearly indicated. Furthermore, it is expected that the handling and management will be improved by printing precautions and expiration dates.

[0029] Furthermore, by having design layer 13a on one side and design layer 13b on the other side, it becomes 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, and the design can be changed according to preference.

[0030] The design layer 13a covers the fire extinguishing agent layer 11, and the design layer 13b covers the magnetic layer 12. This prevents 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 1.

[0031] 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, and the magnetic layer 12 and the design layer 13b are formed via an adhesive layer.

[0032] The design layers 13a and 13b preferably have moderate thermal meltability. When a fire occurs, if the fire extinguishing agent layer 11 is magnetically attached so that it is located on the fire side of the magnetic layer 12, the design layer 13a will melt, exposing the fire extinguishing agent layer 11, which will release an aerosol and extinguish the fire.

[0033] Preferably, the magnetic layer 12 has multiple through holes. When a fire occurs, if the magnetic layer 12 is magnetically attached so that it is located on the fire side of the fire extinguishing agent layer 11, the design layer 13b will first melt due to heat, and the magnetic layer 12 will be exposed. When the magnetic layer 12 is exposed, the fire extinguishing agent layer 11 located on the wall side will be heated through the through holes in the magnetic layer 12, generating aerosols, which will then be ejected through the through holes in the magnetic layer 12 to extinguish the fire.

[0034] The magnetic layer 12 preferably has heat resistance. If the magnetic layer 12 has heat resistance when a fire occurs, the self-extinguishing sheet 1 will be able to maintain magnetic adhesion to the wall surface.

[0035] 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.

[0036] [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 resin layers 14b and 14a between the design layer 13b and the magnetic layer 12, and between the design layer 13a and the fire extinguishing agent layer 11, respectively, compared to the self-extinguishing sheet of the first embodiment.

[0037] The resin layer 14a and the fire extinguishing agent layer 11, the resin layer 14b and the magnetic layer 12, the resin layer 14a and the design layer 13a, and the resin layer 14b and the design layer 13b are each formed via an adhesive layer. The resin layers 14a and 14b cover the fire extinguishing agent layer 11 and the magnetic layer 12, thereby blocking contact between the fire extinguishing agent layer 11 and the outside air. This is expected to prevent deterioration of the fire extinguishing agent layer 11 and improve the durability of the self-extinguishing sheet 2.

[0038] The installation location for the self-extinguishing sheet 2 is the same as in the first embodiment. [Third Embodiment] Figure 3 is a schematic diagram of the self-extinguishing system wall 6 of the third 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 either that of the first or second embodiment.

[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, enabling it to function 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 4 is a schematic diagram of the self-extinguishing system wall 6 of the third 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 6 Self-extinguishing system wall 11. Fire extinguishing agent layer 12 Magnetic layer 13a Design layer (First design layer) 13b Design layer (Second design 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, a magnetic layer provided on one side of the fire extinguishing agent layer, a first design layer provided on the side of the fire extinguishing agent layer opposite to the magnetic layer, and a second design layer provided on the side of the magnetic layer opposite to the fire extinguishing agent layer, wherein the magnetic layer has a plurality of through holes.

2. The self-extinguishing sheet according to claim 1, wherein the magnetic layer is heat-resistant.

3. The self-extinguishing sheet according to claim 1 or claim 2, wherein the magnetic layer comprises a mixture of at least fine powder of a soft magnetic material and an organic polymer elastomer that acts as a binder.

4. The self-extinguishing sheet according to claim 1 or claim 2, wherein the magnetic layer is made of sheet-shaped steel or sheet-shaped ferritic stainless steel.

5. The self-extinguishing sheet according to claim 1 or claim 2, wherein the magnetic layer 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.

6. 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.

7. The self-extinguishing system wall according to claim 6, wherein at least one of the wall surface and the wall material is a magnetized hard magnetic material.

8. The self-extinguishing system wall according to claim 7, wherein the wall surface is made of a fire-resistant panel or a fire-resistant sheet.

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