Fire extinguishing body and method for grasping replacement time of fire extinguishing body

Abstract

To provide a fire extinguishing body capable of appropriately grasping a replacement time when using a fire extinguishing agent having hygroscopicity.SOLUTION: A fire extinguishing body comprising: a fire extinguishing material including a support layer, a print layer provided on one surface of the support layer, and a fire extinguishing agent-containing layer containing a fire extinguishing agent having hygroscopicity; and a gas barrier packaging bag enclosing the fire extinguishing material, wherein the support layer and the packaging bag are visible light transmissive. The print layer may be provided on an inner surface facing the support layer of the packaging bag.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fire extinguishing body. [Background technology]

[0002] BACKGROUND ART A self-extinguishing molded article is known, which is prepared by mixing a fire extinguishing composition that generates an aerosol upon combustion with a binder and molding the mixture into a sheet (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2018 / 047762 Summary of the Invention [Problem to be solved by the invention]

[0004] When the fire extinguishing composition itself is hygroscopic, as in the molded article of Patent Document 1, the fire extinguishing performance of the molded article may be reduced due to moisture absorption, and therefore the molded article needs to be replaced at appropriate times.

[0005] The present invention has been made in view of the above circumstances, and aims to provide a fire extinguisher that can appropriately determine the replacement time when a hygroscopic fire extinguishing agent is used. [Means for solving the problem]

[0006] One aspect of the present invention provides a fire extinguishing body comprising: a support layer, a printed layer provided on one surface of the support layer, and a fire extinguishing agent-containing layer containing a hygroscopic fire extinguishing agent; and a gas-barrier packaging bag that encloses the fire extinguishing material, wherein the support layer and the packaging bag are visible light transparent.

[0007] Another aspect of the present invention provides a fire extinguishing body comprising: a fire extinguishing material having a support layer and a fire extinguishing agent-containing layer containing a hygroscopic fire extinguishing agent; and a gas-barrier packaging bag that encloses the fire extinguishing material and has a printing layer on at least the inner surface facing the support layer, wherein the support layer and the packaging bag are visible light transparent.

[0008] These fire extinguishing elements have a printed layer on the backside of the extinguishing agent-containing layer. Therefore, when the extinguishing agent-containing layer absorbs moisture and the total light transmittance of the extinguishing agent-containing layer increases, the user can see the images and characters contained in the printed layer from outside the packaging bag. This allows the user to check the degree of deterioration over time due to moisture absorption of the extinguishing agent-containing layer and to know the appropriate time to replace the fire extinguishing element.

[0009] In one embodiment, the fire-extinguishing agent-containing layer may contain 70 to 97 mass % of the fire-extinguishing agent.

[0010] In one embodiment, the gas barrier packaging bag may be made from a resin substrate including a resin layer having a metal oxide vapor-deposited layer. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a fire extinguisher that allows the user to properly grasp the replacement time when using a hygroscopic fire extinguishing agent. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic cross-sectional view of a fire extinguishing element according to one embodiment. [Figure 2] FIG. 2 is a schematic cross-sectional view of a fire extinguishing element according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present invention will be described in detail, but the present invention is not limited to the following embodiments.

[0014] <Fire extinguishing body> FIG. 1 is a schematic cross-sectional view of a fire extinguisher according to one embodiment. The fire extinguisher 100 includes a fire extinguishing material 10 and a packaging bag 20 enclosing the fire extinguishing material 10. The packaging bag 20 has a sealed portion around its periphery, and the sealed portion joins the periphery together. More specifically, the fire extinguisher 100 includes the packaging bag 20 formed from a resin substrate, the fire extinguishing material 10 enclosed within the packaging bag, and an adhesive layer 24 (or bonding layer) and a release film 25 on one side of the packaging bag. The resin substrate includes a first resin layer 21 having heat melt properties as an inner layer and a second resin layer (e.g., a water vapor barrier layer) 22 as an outer layer. The first resin layer 21 and the second resin layer 22 are laminated via an adhesive layer 23. The fire extinguishing agent-containing layer 13 is formed on a support layer 11, and a print layer 12 is provided on the surface of the support layer 11 facing the fire extinguishing agent-containing layer 13. In this embodiment, the fire extinguisher can be attached to a desired location because an adhesive layer 24 is provided on one side of the packaging bag. A release film 25 is provided to cover the adhesive layer 24 and is peeled off when the fire extinguisher is attached, and may be made of resin or paper.

[0015] 2 is a schematic cross-sectional view of a fire extinguisher according to another embodiment. The fire extinguisher 200 differs from the fire extinguisher 100 in the position where the printed layer is provided. That is, the fire extinguisher 200 includes a fire extinguishing material 10 having an extinguishing-agent-containing layer 13 on a support layer 11, and a gas-barrier packaging bag 20 that encloses the fire extinguisher 10 and has a printed layer 26 provided on at least the inner surface facing the support layer 11.

[0016] The thickness of the center of the fire extinguishing body is not necessarily limited because it varies depending on the layer structure and the amount of fire extinguishing material enclosed, but can be, for example, 2 to 20 mm from the viewpoint of being able to make it thin so that installation space is not a concern while maintaining fire extinguishing performance. Also, the area of ​​the main surface of the fire extinguishing body (the surface when viewed from above in the vertical direction) can be, for example, 9 to 620 cm from the viewpoint of fire extinguishing performance and ease of handling. 2 It can be said that:

[0017] [Packaging bag] The packaging bag includes a resin substrate and is made from the resin substrate. The resin substrate includes a resin layer. Examples of materials for the resin layer include polyolefin (PE, PP, COP, etc.), polyester (PET, etc.), fluororesin (PTFE, ETFE, EFEP, PFA, FEP, PCTFE, etc.), vinyl resin (PVC, PVA, etc.), acrylic resin, epoxy resin, polyamide, polyimide, etc. The resin substrate may be composed of one resin layer made of these materials, or may be composed of multiple resin layers. The multiple resin layers may each be made of a different material. When the resin substrate is composed of multiple layers, the layers may be bonded together with an adhesive (adhesive layer). Examples of adhesives include acrylic adhesives, epoxy adhesives, silicone adhesives, polyolefin adhesives, urethane adhesives, polyvinyl ether adhesives, or synthetic adhesives thereof.

[0018] The resin layer may have heat-melting properties (thermal adhesiveness). A resin layer having heat-melting properties can be referred to as a heat-melting layer. The heat-melting layer can be provided on the innermost layer side of the resin substrate (the side facing the fire extinguishing material). When the resin substrate has a heat-melting layer, the sealed portion around the packaging bag edge can be referred to as a heat-sealed portion. Examples of resins having heat-melting properties include polyolefin-based resins. That is, the resin layer may contain a polyolefin-based resin. Examples of polyolefin-based resins include polyolefin-based resins such as low-density polyethylene resin (LDPE), linear low-density polyethylene resin (LLDPE), medium-density polyethylene resin (MDPE), and unstretched polypropylene resin (CPP); polyethylene-based resins such as ethylene-vinyl acetate copolymer and ethylene-α-olefin copolymer; and polypropylene-based resins such as propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α-olefin copolymer. Among these, the polyolefin resin may include low-density polyethylene resin (LDPE), linear low-density polyethylene resin (LLDPE), or unoriented polypropylene resin (CPP) from the viewpoint of excellent heat sealing properties, low water vapor permeability, and easy suppression of deterioration of the fire extinguishing agent. These resins are transparent to visible light, facilitating visual inspection of the fire extinguishing agent. Therefore, it becomes easy to check when the fire extinguishing element needs to be replaced.

[0019] The material of the resin substrate may be selected so that the packaging bag has visible light transmittance, which means that the fire extinguishing material can be seen from outside the packaging bag, and specifically means that the total light transmittance in the visible light range measured in accordance with JIS-7361-1 is 60% or more.

[0020] When a heat-melting layer is not provided, an adhesive can be used to bond the resin substrates together. Examples of adhesives include acrylic adhesives, epoxy adhesives, silicone adhesives, polyolefin adhesives, urethane adhesives, polyvinyl ether adhesives, and synthetic adhesives thereof. Among these, epoxy-urethane synthetic adhesives are preferred from the viewpoint of achieving both low cost and good adhesion to the resin substrate at high temperatures and high humidity (85°C-85%RH).

[0021] When the periphery of the resin base material is joined using an adhesive, the sealed portion of the periphery of the packaging bag can be called the adhesive portion.

[0022] The resin layer can have a metal oxide vapor-deposited layer on its surface. A resin layer having a metal oxide vapor-deposited layer can be called a water vapor barrier layer. The water vapor barrier layer makes it easier to maintain water vapor barrier properties to the extent that the properties of the fire extinguishing agent do not change significantly, regardless of the installation location or usage environment of the fire extinguishing element. The water vapor permeability of the water vapor barrier layer (JIS K 7129 compliant, under conditions of 40°C / 90% RH) is not particularly limited as it can be designed according to the type of fire extinguishing agent, but it is preferably 10 g / m 2 / day or less, and 2 / day or less. From the viewpoint of adjusting the water vapor permeability, the water vapor barrier layer may be a polyester resin layer (e.g., a PET layer) provided with a metal oxide vapor-deposited layer such as an alumina vapor-deposited layer or a silica vapor-deposited layer. When the resin layer has a metal oxide vapor-deposited layer, the metal oxide vapor-deposited layer may face the fire-extinguishing agent-containing layer.

[0023] A printed layer may be provided on the inner surface of the packaging bag, at least on the inner surface facing the support layer. That is, the resin substrate may have a printed layer on its surface (on the surface of the metal oxide layer, if any). The printed layer may also be provided on an inner surface other than the inner surface facing the support layer. The printed layer may be formed using a method such as gravure printing, offset printing, or inkjet printing. The printed layer may include images or characters that indicate when the fire extinguishing element needs to be replaced. The thickness of the printed layer is not particularly limited and may be 0.1 to 10 μm.

[0024] The thickness of the resin substrate can be appropriately selected depending on the usage environment of the fire extinguisher, the allowable space, etc. For example, a thick resin substrate can easily suppress water vapor permeation, easily obtain strength and rigidity, easily obtain a highly flat form, and facilitate handling. Furthermore, a thin resin substrate can allow the fire extinguisher to be installed in a narrow space. The thickness of the resin substrate can be, for example, 4.5 to 1000 μm, or may be 12 to 100 μm, or may be 12 to 50 μm. The thicknesses of the resin layer and the water vapor barrier layer can be appropriately adjusted depending on the thickness of the resin substrate. The thickness of the resin layer (the total thickness when the resin substrate includes multiple resin layers) can be, for example, 25 to 150 μm, or may be 30 to 100 μm. The thickness of the water vapor barrier layer can be, for example, 4.5 to 25 μm, or may be 7 to 12 μm.

[0025] [Fire extinguishing material] The fire extinguishing material comprises a support layer, a print layer, and a fire extinguishing agent-containing layer containing a hygroscopic fire extinguishing agent. Alternatively, the fire extinguishing material comprises a support layer and a fire extinguishing agent-containing layer containing a hygroscopic fire extinguishing agent.

[0026] The support layer may be any of the resin layers exemplified in the section on resin substrates above. The material of the support layer may be selected so that the support layer is transparent to visible light, but when a printing layer is provided between the support layer and the fire-extinguishing agent-containing layer, the support layer does not necessarily have to be transparent to visible light.

[0027] The thickness of the support layer, like the resin substrate, can be appropriately selected depending on the usage environment of the fire extinguisher, the allowable space, etc. The thickness of the support layer can be, for example, 4.5 to 250 μm, or may be 12 to 150 μm, or may be 50 to 75 μm.

[0028] The printing layer is provided on either one surface of the support layer, but may be provided on both surfaces of the support layer. The preferred embodiment of the printing layer is as described above.

[0029] (Fire extinguishing agent-containing layer) The fire extinguishing agent-containing layer may be formed by molding a composition (fire extinguishing material-forming composition) containing a hygroscopic fire extinguishing agent and a binder. By molding the fire extinguishing agent using a binder, the properties of the fire extinguishing agent are easily maintained, and the frequency of replacing the fire extinguishing body can be reduced. The fire extinguishing material-forming composition may further contain a liquid medium in addition to the resin and binder.

[0030] The total light transmittance of a hygroscopic fire extinguishing agent increases as it absorbs moisture. The time to replace the fire extinguishing agent can be determined when the total light transmittance of the fire extinguishing agent, measured in accordance with JIS-7361-1, exceeds 50%, for example.

[0031] The extinguishing agent is not particularly limited, and any agent that is hygroscopic and has the four elements of fire extinguishing (removal action, cooling action, suffocation action, and negative catalytic action) can be used appropriately depending on the type of object. Examples of the extinguishing agent include ABC extinguishing agents and BC(K) extinguishing agents. The extinguishing agent can contain at least one salt selected from organic salts and inorganic salts.

[0032] Thermoplastic resins and thermosetting resins can be used as binders. Examples of thermoplastic resins include polyolefin resins such as polypropylene resins, polyethylene resins, poly(1-)butene resins, and polypentene resins, polystyrene resins, acrylonitrile-butadiene-styrene resins, methyl methacrylate-butadiene-styrene resins, ethylene-vinyl acetate resins, ethylene-propylene resins, polycarbonate resins, polyphenylene ether resins, acrylic resins, polyamide resins, polyvinyl chloride resins, polyvinyl alcohol (PVA), and polyvinyl butyral (PVB). Examples of thermosetting resins include natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), 1,2-polybutadiene rubber (1,2-BR), styrene-butadiene rubber (SBR), chloroprene rubber (CR), nitrile rubber (NBR), butyl rubber (IIR), ethylene-propylene rubber (EPR, EPDM), chlorosulfonated polyethylene (CSM), acrylic rubber (ACM, ANM), epichlorohydrin rubber (CO, ECO), multi-vulcanized rubber (T), silicone rubber (Q), fluororubber (FKM, FZ), and urethane rubber (U), as well as polyurethane resins, polyisocyanate resins, polyisocyanurate resins, phenolic resins, and epoxy resins. The binder may contain a curing agent component.

[0033] The fire-extinguishing agent-containing layer may contain other components such as a colorant, an antioxidant, a flame retardant, an inorganic filler, etc. These components can be appropriately selected depending on the composition of the fire-extinguishing agent-containing layer and the type of binder.

[0034] The content of the fire extinguishing agent in the fire extinguishing agent-containing layer (based on the mass of the fire extinguishing agent-containing layer) can be 70 to 97 mass%, or alternatively 80 to 95 mass%, or alternatively 85 to 92 mass%. A fire extinguishing agent content of 70 mass% or more facilitates achieving excellent fire extinguishing performance, while a content of 97 mass% or less facilitates achieving excellent moldability. When the fire extinguishing agent-containing layer contains other components, the content of the other components in the fire extinguishing agent-containing layer (based on the mass of the fire extinguishing agent-containing layer) can be 10 mass% or less.

[0035] The thickness of the extinguishing agent-containing layer may be appropriately set depending on the installation location of the extinguishing body and the amount of extinguishing agent to be blended in. The thickness of the extinguishing agent-containing layer may be, for example, 1 mm or less, and may be 30 to 1000 μm, 100 to 500 μm, or 150 to 500 μm.

[0036] The liquid medium may be an organic solvent. Examples of the organic solvent include water-soluble solvents, such as alcohols such as methanol, ethanol, isopropyl alcohol, and n-propyl alcohol; ketones such as acetone and methyl ethyl ketone; glycols such as ethylene glycol and diethylene glycol; and glycol ethers such as N-methylpyrrolidone (NMP), tetrahydrofuran, and butyl cellosolve. In view of the hygroscopicity of the fire extinguishing agent, the liquid medium may be an alcohol-based solvent, specifically isopropyl alcohol.

[0037] The amount of the liquid medium may be adjusted appropriately depending on the method of use of the composition for forming a fire extinguishing material, but may be 40 to 95 mass % based on the total amount of the composition for forming a fire extinguishing material. The composition for forming a fire extinguishing material containing the liquid medium can be called a coating liquid for forming a fire extinguishing material.

[0038] [Fire extinguishing material formation method] The fire-extinguishing material can be formed by applying a coating liquid for forming the fire-extinguishing material onto a support layer and drying the coating. The application can be carried out by a wet coating method. Examples of wet coating methods include gravure coating, comma coating, spray coating, dip coating, curtain coating, spin coating, sponge roll coating, die coating, and brush coating.

[0039] The viscosity of the coating liquid for forming a fire-extinguishing material is preferably 1 to 2000 mPa·s if the gravure coating method is used, 500 to 100,000 mPa·s if the comma coating method is used, and 0.1 to 4000 mPa·s if the spray coating method is used. The amount of the liquid medium may be adjusted appropriately so that the coating liquid viscosity falls within the desired range. Viscosity can be measured using a coaxial double cylinder rotational viscometer. [Example]

[0040] The present invention will be described in more detail by the following examples, but the present invention is not limited to these examples.

[0041] <Creating a fire extinguishing body> Example 1 Black ink (product name: ATSK 921 Black, manufactured by Toyo Ink Co., Ltd.) was applied by gravure printing onto a PET support substrate (product name: S10, manufactured by Toray Industries, Inc.) and dried at a drying temperature of 80°C for 1 minute to form a printed layer with a thickness of 1 μm. A powder fire extinguishing agent (product name: ABC Fire Extinguishing Agent, manufactured by Morita Miyata Kogyo Co., Ltd.) and a urethane binder (product name: TE-5899, manufactured by Mitsui Chemicals, Inc.) were added to isopropyl alcohol and mixed to obtain a coating liquid. The mass ratio of the binder to the fire extinguishing agent (mass of binder / mass of fire extinguishing agent) was adjusted to 0.1. This coating liquid was applied using an applicator onto the surface of the PET support substrate on which the printed layer had been formed, and dried at a drying temperature of 90°C for 1 minute to form a 150 μm thick fire extinguishing agent-containing layer, thereby obtaining a fire extinguishing material. The obtained fire extinguishing material was enclosed in a packaging bag made from a PET substrate with a silica vapor deposition layer to obtain a fire extinguishing body. The silica vapor deposition layer was on the inner surface of the packaging bag. The heat sealing conditions for producing the packaging bag were heat seal width: 10 mm, temperature: 180°C, time: 10 seconds, and pressure: 0.5 MPa. The packaging bag was transparent to visible light, so the fire extinguishing material could be seen from outside the packaging bag.

[0042] Example 2 A powder fire extinguishing agent (product name: ABC Fire Extinguishing Agent, manufactured by Morita Miyata Kogyo Co., Ltd.) and a binder (product name: TE-5899, manufactured by Mitsui Chemicals, Inc.) were added to isopropyl alcohol and mixed to obtain a coating liquid. The mass ratio of the binder to the fire extinguishing agent (mass of binder / mass of fire extinguishing agent) was adjusted to 0.1. This coating liquid was applied to a PET support substrate (product name: S10, manufactured by Toray Industries, Inc.) using an applicator and dried at a drying temperature of 90°C for 1 minute to form a fire extinguishing agent-containing layer with a thickness of 150 μm, thereby obtaining a fire extinguishing material. Black ink (product name: ATSK 921 Black, manufactured by Toyo Ink Co., Ltd.) was applied by gravure printing onto a PET substrate with a silica vapor deposition layer, and dried at a drying temperature of 80°C for 1 minute to form a 1 μm thick printing layer. The obtained fire extinguishing material was enclosed in a packaging bag made using a PET substrate with a printed layer and a PET substrate without a printed layer (a PET substrate with a silica vapor deposition layer), to obtain a fire extinguishing body. The printed layer and silica vapor deposition layer of each substrate were placed on the inner surface of the packaging bag. The fire extinguishing material was enclosed so that the printed layer on the PET substrate faced the PET support substrate. The heat sealing conditions for producing the packaging bag were the same as in Example 1. The packaging bag was visible light transparent, and the fire extinguishing material could be seen from outside the packaging bag.

[0043] Example 3 A fire extinguisher was prepared in the same manner as in Example 1, except that a powder fire extinguisher (product name: ABC fire extinguisher, manufactured by Morita Miyata Kogyo Co., Ltd.) was used instead of a powder fire extinguisher (product name: BC(K) fire extinguisher, manufactured by Morita Miyata Kogyo Co., Ltd.).

[0044] <Storage experiment of fire extinguishing bodies> The fire extinguishing agents obtained in each example were stored in various storage environments as shown in Table 1. After the specified storage time had elapsed, various evaluations were carried out on the fire extinguishing agents. The evaluation results are shown in Table 1.

[0045] (Visibility of printed layer) The fire extinguishing material was visually observed from the outside of the packaging bag, and the printed layer was rated as A when it was visible from the fire extinguishing agent-containing layer side, and B when it was not visible.

[0046] (Total light transmittance) The fire extinguishing material was removed from the packaging bag and its total light transmittance was measured in accordance with JIS-7361-1. A total light transmittance of 50% or less was rated A, and a total light transmittance of over 50% was rated B.

[0047] [Table 1]

[0048] The replacement period for a fire extinguishing element varies depending on the environment in which it is used. However, by providing a printing layer inside the fire extinguishing element, as shown in Table 1, it is possible to easily determine the appropriate replacement period for the fire extinguishing element depending on the environment in which it is used. [Explanation of symbols]

[0049] 10...fire extinguishing material, 11...support layer, 12, 26...printed layer, 13...fire extinguishing agent-containing layer, 20...packaging bag, 21...first resin layer, 22...second resin layer, 23...adhesive layer, 24...sticky layer, 25...release film, 100, 200...fire extinguishing body.

Claims

1. a fire extinguishing material including a support layer, a print layer provided on one surface of the support layer, and a fire extinguishing agent-containing layer containing a hygroscopic fire extinguishing agent; a gas barrier packaging bag that encloses the fire extinguishing material; The fire extinguisher, wherein the support layer and the packaging bag are visible light transmissive.

2. a fire-extinguishing material including a support layer and a fire-extinguishing agent-containing layer containing a hygroscopic fire-extinguishing agent; a gas-barrier packaging bag that encloses the fire-extinguishing material and has a print layer on at least the inner surface facing the support layer, The fire extinguisher, wherein the support layer and the packaging bag are visible light transmissive.

3. The fire extinguisher according to claim 1 or 2, wherein the extinguishing agent-containing layer contains 70 to 97% by mass of the extinguishing agent.

4. The fire extinguisher according to any one of claims 1 to 3, wherein the gas barrier packaging bag is made from a resin substrate including a resin layer having a metal oxide vapor deposition layer.

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