Fire extinguishing material package and electrical equipment equipped therewith

Abstract

The present invention provides a fire extinguishing material package that ensures sealing strength in the sealant layer while suppressing moisture permeation in the sealant layer. [Solution] The fire extinguishing material package according to the present disclosure comprises a fire extinguishing body having a fire extinguishing agent layer containing a fire extinguishing agent, and a packaging material containing the fire extinguishing body. The packaging material is composed of a laminate having at least a base layer, an adhesive layer, a barrier layer, and a sealant layer in this order from the outside to the inside, and has a housing portion for containing the fire extinguishing body and a sealing portion in which the laminate has a two-layer structure with the sealant layers facing each other and the sealant layers are heat-fused together. The sealing portion has a first region and a second region in which the thickness of the sealant layer is smaller than that of the first region, and the end face in the lamination direction of the second region has a recessed shape with respect to the end face in the lamination direction of the first region.

Description

Technical Field

[0001] The present disclosure relates to a fire extinguishing material package and electrical equipment provided with the same.

Background Art

[0002] In recent years, with the advancement of technology, our lives have become increasingly comfortable. On the other hand, a large amount of energy is required to produce such comfort, and high safety is required in each scene such as densely filling, storing, and moving this energy. Taking automobiles as an example, risks of ignition and fire lurk in scenes such as mining fossil fuels represented by gasoline, refining fossil fuels into gasoline, and transporting them. Taking electronics as another example, risks of ignition and fire similarly lurk when moving electrical energy through electric wires, adjusting electrical energy at substations or transformers, using electrical energy in electrical devices at homes or factories, or temporarily storing electrical energy in storage batteries, and the like.

[0003] From the viewpoint of minimizing damage caused by fire, it is desirable that some kind of fire extinguishing work, that is, initial fire extinguishing, be performed at a stage shortly after ignition. Accordingly, a method is conceivable in which a self-extinguishing molded article formed by mixing a fire extinguishing agent that generates an aerosol upon combustion with a binder and molding the mixture into a sheet shape is made to exist in advance in the vicinity of an object at risk of ignition. By doing so, it is expected that fire extinguishing will be completed by the self-extinguishing molded article before a human senses that the object has ignited (see Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

[0005] Incidentally, self-extinguishing molded products sometimes use deliquescent components as extinguishing agents, and these products are sometimes packaged in packaging bags to improve handling and storage. The packaging bags serve to suppress the permeation of moisture into the package, among other things.

[0006] For example, in the field of battery containers, a laminated film is being considered as a container that suppresses the permeation of moisture into the inside of the package. This container is formed by sequentially laminating at least an adhesive layer, an aluminum foil layer, an adhesive resin layer, and a sealant layer on one side of a base layer, and then heat-sealing the edges of two laminated films so that the sealant layers adhere to each other. In this case, the total thickness of the adhesive resin layer and the sealant layer in the heat-sealed portion changes continuously from the inside to the outside of the battery container (see Figure 2 of Patent Document 3).

[0007] However, while the conventional technology described above suppressed moisture permeation by providing a sloped section in the heat-sealed area, there was room for improvement, particularly in suppressing moisture permeation at the edges of the sealant layer.

[0008] This disclosure is made in view of the above circumstances and aims to provide a fire extinguishing material package and electrical equipment equipped therewith, which ensures sealing strength in the sealant layer while suppressing moisture permeation in the sealant layer. [Means for solving the problem]

[0009] One aspect of this disclosure relates to a fire extinguishing material package. This fire extinguishing material package comprises a fire extinguishing body having a fire extinguishing agent layer containing a fire extinguishing agent, and a packaging bag that contains the fire extinguishing body, which is composed of a laminate having at least a base layer, an adhesive layer, a barrier layer, and a sealant layer in that order from the outside to the inside. The packaging bag has a housing portion that houses the fire extinguishing body by the laminate, and a sealing portion that is positioned on the outside of the housing portion in a direction perpendicular to the lamination direction of the laminate, and in which the laminate has a two-layer structure with the sealant layers facing each other and the sealant layers are heat-fused together. The sealing portion has a first region and a second region in which the thickness of the sealant layer is smaller than that of the first region. The end face of the second region in the lamination direction has a recessed shape with respect to the end face of the first region in the lamination direction.

[0010] In the fire extinguishing material package described above, a first region and a second region are formed in the seal portion of the laminated structure, which has a two-layer structure. The end face in the laminated direction of the second region has a recessed shape relative to the end face in the laminated direction of the first region. The thickness of the sealant layer in the second region is smaller than the thickness of the sealant layer in the first region. As a result, moisture is less likely to permeate the second region compared to the first region. Also, the thickness of the sealant layer in the first region is larger than the thickness of the sealant layer in the second region. As a result, sufficient sealing strength can be obtained in the first region compared to the second region. Therefore, it is possible to suppress moisture permeation in the sealant layer while ensuring sealing strength in the sealant layer.

[0011] From the viewpoint of further suppressing moisture permeation, the end face in the stacking direction of the second region may have a stepped or substantially stepped recessed shape relative to the end face in the stacking direction of the first region. From the viewpoint of further suppressing moisture permeation, the total length of the second region in the direction perpendicular to the stacking direction may be 2 mm or more. That is, in such a configuration, the length of the second region is sufficiently secured, so that the distance that moisture that penetrates the sealant layer travels before reaching the fire extinguishing material can be increased.

[0012] From the viewpoint of further increasing the seal strength, the thickness in the lamination direction of the first region may be 30 to 100 μm, and the thickness in the lamination direction of the second region may be 25 to 70 μm. The sealant layer is formed of a material mainly composed of a thermoplastic resin, for example. From the viewpoint of improving fire extinguishing performance, the fire extinguishing agent may contain potassium citrate and potassium chlorate.

[0013] One aspect of this disclosure relates to an electrical installation. This electrical installation comprises a fire extinguishing material package and an electrical device that is the target of fire extinguishing by the fire extinguishing material package. In the above electrical installation, the fire extinguishing material package ensures the sealing strength in the sealant layer while suppressing the permeation of moisture in the sealant layer. Therefore, the above electrical installation can exhibit self-extinguishing performance over a long period of time. [Effects of the Invention]

[0014] This disclosure provides a fire extinguishing material package and electrical equipment equipped therewith, which ensures sealing strength in the sealant layer while suppressing moisture permeation in the sealant layer. [Brief explanation of the drawing]

[0015] [Figure 1] This is a perspective view showing a fire extinguishing material package according to one embodiment of this disclosure. [Figure 2] This is a cross-sectional view along the line II-II shown in Figure 1. [Figure 3] This is a cross-sectional view showing an example of a laminate that makes up a packaging material. [Figure 4] This is an enlarged cross-sectional view showing the seal portion of a fire extinguishing material package according to one embodiment. [Figure 5] This is a cross-sectional view showing a method for manufacturing a fire extinguishing material package according to one embodiment. [Figure 6] This is a cross-sectional view showing a method for manufacturing a modified fire extinguishing material package. [Figure 7] This is a cross-sectional view showing a method for manufacturing a fire extinguishing material package according to other variations. [Figure 8]It is a plan view and a cross-sectional view showing a seal portion of a fire extinguishing material package according to still another modified example. [Figure 9] It is a perspective view schematically showing one embodiment of the electrical equipment according to the present disclosure. [Modes for Carrying Out the Invention]

[0016] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that, in the drawings, the same or equivalent elements are denoted by the same reference numerals, and duplicate descriptions are omitted.

[0017] <Fire Extinguishing Material Package> Figure 1 is a perspective view showing a fire extinguishing material package 50 according to one embodiment of the present disclosure. Figure 2 is a cross-sectional view taken along the line II-II shown in Figure 1. The fire extinguishing material package 50 includes a packaging bag 1 and a fire extinguishing film 30 (fire extinguishing body). The packaging bag 1 accommodates the fire extinguishing film 30. The packaging bag 1 is, for example, a pouch type. The fire extinguishing film 30 is arranged at the central portion of the packaging bag 1. As shown in Figure 1 and Figure 2, the packaging bag 1 includes an accommodating portion 1b and a seal portion 1a. The accommodating portion 1b is a portion that accommodates the fire extinguishing film 30 by the laminate 10. Figure 3 is a cross-sectional view showing the laminate 10. More specifically, the laminate 10 has a base material layer 2, a first adhesive layer 3, a barrier layer 4, a second adhesive layer 5, and a sealant layer 6. The fire extinguishing film 30 is a film that develops a fire extinguishing function by reacting to heat generated when a fire breaks out. The fire extinguishing film 30 includes, for example, a fire extinguishing agent layer 31 containing a fire extinguishing agent, and a resin film 32 that supports the fire extinguishing agent layer 31.

[0018] In the following description, the thickness direction of the laminate (packaging material) constituting the packaging bag 1 is defined as the lamination direction D1, the longitudinal direction of the fire extinguishing material package 50 is defined as the longitudinal direction D2 (direction perpendicular to the lamination direction), and the width direction of the fire extinguishing material package 50 is defined as the width direction D3 (direction perpendicular to the lamination direction). For example, the longitudinal direction D2 and the width direction D3 are horizontal directions, and the lamination direction D1 is a vertical direction. The lamination direction D1, the longitudinal direction D2, and the width direction D3 are mutually orthogonal.

[0019] [Packaging Bag] The packaging bag 1 is composed of a packaging material in which a base layer 2, an adhesive layer 3, a barrier layer 4, an adhesive layer 5, and a sealant layer 6 are laminated along the lamination direction D1. In the packaging bag 1, the base layer 2 is the outermost layer, and the sealant layer 6 is the innermost layer. The "outermost layer" is the layer located furthest from the fire extinguishing film 30. The "innermost layer" is the layer located closest to the fire extinguishing film 30.

[0020] The base layer 2 is a sheet-like member. The base layer 2 has heat resistance during the sealing process when manufacturing the fire extinguishing material package 50. The base layer 2 may have a melting peak temperature higher than the melting peak temperature of the sealant layer 6. In this case, deformation of the laminate 10 caused by the melting of the base layer 2 during heat sealing of the laminate 10 can be suppressed. The "melting peak temperature of the sealant layer 6" is the melting peak temperature of the sealant layer with the highest melting peak temperature in the multilayer sealant layer 6.

[0021] The melting peak temperature of the base layer 2 is, for example, 250°C to 350°C. The melting peak temperature is a value determined in accordance with the method described in JIS K7121-1987. The temperature difference (T11-T16) between the melting peak temperature T11 of the base layer 2 and the melting peak temperature T16 of the sealant layer 6 is, for example, 20°C or more. By having this temperature difference of 20°C or more, deterioration of the appearance of the laminate 10 caused by heat sealing can be effectively suppressed.

[0022] The base layer 2 is, for example, a layer formed from an insulating resin. Examples of resins that form the base layer 2 include polyester resin, polyamide resin, polyimide resin, polyamide-imide resin, polyetherketone resin, polyphenylene sulfide resin, polyetherimide resin, polysulfone resin, fluororesin, phenolic resin, melamine resin, urethane resin, allyl resin, silicone resin, epoxy resin, furan resin, acetylcellulose resin, and the like.

[0023] Among the resins mentioned above, at least one of polyester resin and polyamide resin may be used as the resin forming the base layer 2, from the viewpoint of moldability. Examples of polyester resins include polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate.

[0024] Examples of polyamide resins include nylon 6, nylon 6,6, copolymers of nylon 6 and nylon 6,6, nylon 9T, nylon 10, polymetaxylylene adipamide (MXD6), nylon 11, nylon 12, etc. The base layer 2 may contain additives depending on the required performance.

[0025] The base layer 2 may be in the form of a stretched or unstretched film, but is not limited to this. The base layer 2 may also be in the form of a coating film. The base layer 2 may be a single layer or a multilayer. If the base layer 2 is a multilayer, the layers contained in the base layer 2 may be formed from different resins or from the same resin.

[0026] If the base layer 2 is in the form of a film, it may be formed by co-extrusion or laminated via an adhesive. If the base layer 2 is a coating film, the coating film may be obtained, for example, by coating multiple times with a coating film-forming composition. The base layer 2 may have a multilayer structure combining a film and a coating film.

[0027] When the aforementioned resin is used in film form, the base layer 2 may be a biaxially oriented film. In this case, the moldability of the laminate 10 is improved. Examples of stretching methods for biaxially oriented films include sequential biaxial stretching, tubular biaxial stretching, and simultaneous biaxial stretching. From the viewpoint of obtaining better deep-draw moldability, the biaxially oriented film may be a film stretched by tubular biaxial stretching.

[0028] The thickness of the substrate layer 2 in the lamination direction D1 is, for example, 4.5 μm to 60 μm. By having the thickness of the substrate layer 2 in the lamination direction D1 within the above range, the thermal conductivity of the substrate layer 2 can be set within a good range. The substrate layer 2 may contain, for example, additives. Examples of additives include flame retardants, slip agents, antiblocking agents, antioxidants, light stabilizers, tackifiers, etc.

[0029] The adhesive layer 3 is the layer that adheres the barrier layer 4 to the base material layer 2. The adhesive layer 3 has the necessary adhesive strength to firmly bond the base material layer 2 and the barrier layer 4. The adhesive layer 3 has conformability to prevent the barrier layer 4 from being broken by the base material layer 2. "Conformability" means that even if the member deforms due to expansion or contraction, the adhesive layer 3 remains on the member without peeling off.

[0030] Examples of adhesive components that form the adhesive layer 3 include urethane compounds, urea compounds, epoxy compounds, and silicone compounds. These compounds may be used individually or in combination of two or more.

[0031] Urethane compounds are obtained by reacting polyol resins with polyfunctional isocyanate compounds. Urea compounds are obtained by reacting amine compounds and amine derivatives with polyfunctional isocyanate compounds.

[0032] Examples of polyol resins include polyester polyols, polyether polyols, polycarbonate diols, and polyacrylic polyols.

[0033] Examples of polyester polyols include those obtained by reacting one or more dicarboxylic acids with a diol.

[0034] Examples of polyether polyols include those produced by addition polymerization of ethylene oxide or propylene oxide to propylene glycol, glycerin, and pentaerythritol.

[0035] Examples of polycarbonate polyols include those obtained by reacting a diester of carbonate, such as diphenyl carbonate, with a diol.

[0036] Examples of polyacrylic polyols include copolymers obtained by copolymerizing at least a hydroxyl group-containing acrylic monomer with (meth)acrylic acid. In this case, structural units derived from (meth)acrylic acid may be included as the main component.

[0037] Examples of hydroxyl group-containing acrylic monomers include 2-hydroxyethyl (meth)acrylate and 2-hydroxypropyl (meth)acrylate.

[0038] Polyfunctional isocyanate compounds contain multiple isocyanate groups. Polyfunctional isocyanate compounds can function as crosslinking agents for the amine resin or polyol mentioned above. Polyfunctional isocyanate compounds may be used individually or in combination of two or more. Examples of polyfunctional isocyanate compounds include aliphatic polyfunctional isocyanate compounds, alicyclic polyfunctional isocyanate compounds, and polyfunctional isocyanate compounds having aromatic rings.

[0039] Examples of aliphatic polyfunctional isocyanate compounds include hexamethylene diisocyanate (HDI) and xylylene diisocyanate (XDI). Examples of alicyclic polyfunctional isocyanate compounds include isophorone diisocyanate (IPDI).

[0040] Examples of polyfunctional isocyanate compounds having an aromatic ring include tolylene diisocyanate (TDI) and diphenylmethane diisocyanate (MDI). Polyfunctional isocyanate compounds can also be used in the form of polymers (e.g., trimers) of these compounds. Specifically, adducts, biuretes, isocyanurates, etc., can be used.

[0041] From the viewpoint of improving pot life, the isocyanate group of the polyfunctional isocyanate compound may be bonded to a blocking agent. Examples of blocking agents include methyl ethyl ketoxime (MEKO).

[0042] The temperature at which the blocking agent detaches from the isocyanate group of the polyfunctional isocyanate compound may be 50°C or higher. From the viewpoint of improving pot life, this temperature may be 60°C or higher. The temperature at which the blocking agent detaches from the isocyanate group of the polyfunctional isocyanate compound may be 140°C or lower. From the viewpoint of the mold curl resistance of the laminate 10, this temperature may be 120°C or lower.

[0043] To lower the dissociation temperature of the blocking agent, a catalyst that lowers the dissociation temperature may be used in the adhesive layer 3. Examples of catalysts that lower the dissociation temperature include tertiary amines such as triethylenediamine and N-methylmorpholine, and metal organic salts such as dibutyltin dilaurate.

[0044] Amine compounds are compounds that contain an amino group in their molecule. Here, "amino group" refers to -NH2, -NHR, or -NR2, where R represents an alkyl group and / or an allyl group. Amine derivatives are compounds derived from amine compounds that do not contain an amino group in their molecule.

[0045] Amine compounds and amine derivatives may be either visible or latent curing agents. A latent curing agent is a curing agent that is activated by external stimuli to generate a reactive group that can react with an isocyanate group. When amine compounds and amine derivatives are latent curing agents, the pot life tends to improve.

[0046] Examples of external stimuli include heat and humidity. Examples of latent curing agents include imidazole-based curing agents, imine-based curing agents, amine-imide-based curing agents, dicyandiamide-based curing agents, aromatic polyamine curing agents, aliphatic polyamine curing agents, polyamidoamine-based curing agents, tertiary amine salt-based curing agents, and oxazolidine-based curing agents.

[0047] Among the above, examples of latent curing agents that are activated by heating include imidazole-based curing agents, dicyandiamide-based curing agents, polyamine-based curing agents, and amineimide-based curing agents.

[0048] Examples of latent curing agents that are activated by moisture include imine-based curing agents and oxazolidine-based curing agents. From the viewpoint of improving pot life, latent curing agents that are activated by moisture may also be used.

[0049] The thickness of the adhesive layer 3 in the lamination direction D1 is not particularly limited, but from the viewpoint of obtaining desired adhesive strength, thermal conductivity, conformability, and processability, it is, for example, 1 μm to 20 μm.

[0050] The mass per unit area of ​​the adhesive layer 3 is set to, for example, 2.0 g / m², from the viewpoint of ensuring superior laminate strength in both room temperature and high-temperature environments, as well as obtaining superior deep-draw moldability. 2 ~6.0g / m 2 That is the case.

[0051] The barrier layer 4 has water vapor barrier properties that prevent moisture from penetrating into the fire extinguishing material package 50. The barrier layer 4 may also be ductile for deep drawing. In this embodiment, the barrier layer 4 is, for example, a metal foil layer.

[0052] As the barrier layer 4, for example, various metal foils such as aluminum, stainless steel, and copper, or metal vapor-deposited films, inorganic oxide vapor-deposited films, carbon-containing inorganic oxide vapor-deposited films, or films provided with these vapor-deposited films may be used.

[0053] Examples of films with a vapor-deposited film include aluminum vapor-deposited films and inorganic oxide vapor-deposited films. These may be used individually or in combination of two or more types. The barrier layer 4 may also contain aluminum foil, considering factors such as mass (specific gravity), barrier properties such as moisture resistance, processability, and cost.

[0054] If the barrier layer 4 contains aluminum foil, it may also contain annealed soft aluminum foil, as this can provide the desired ductility during molding. The barrier layer 4 may also contain iron-containing aluminum foil to provide further pinhole resistance and ductility during molding.

[0055] The iron content in aluminum foil is, for example, 0.1% to 9.0% by mass per 100% by mass of aluminum foil. The aluminum foil is, for example, 8021 or 8079 material as specified in the JIS standard.

[0056] By having an iron content of 0.1% by mass or more, a laminate 10 with superior pinhole resistance and ductility can be obtained. By having an iron content of 9.0% by mass or less, a laminate 10 with superior flexibility can be obtained.

[0057] As for the aluminum foil, untreated aluminum foil may be used, but degreasing treatment may also be used to provide corrosion resistance. When the aluminum foil is degreased, the treatment may be applied to only one side of the aluminum foil, or to both sides.

[0058] For degreasing, for example, a wet-type degreasing treatment or a dry-type degreasing treatment can be used. However, from the viewpoint of simplifying the manufacturing process, a dry-type degreasing treatment may be performed as the degreasing treatment.

[0059] One example of a dry-type degreasing treatment is to extend the processing time during the annealing process of metal foil. Sufficient electrolyte resistance can be obtained even with a degreasing treatment performed simultaneously with the annealing process, which is carried out to soften the metal foil.

[0060] As a dry-type degreasing treatment, treatments other than annealing, such as flame treatment and corona treatment, may be used. Furthermore, as a dry-type degreasing treatment, for example, a degreasing treatment in which contaminants are oxidized, decomposed, and removed by reactive oxygen species generated when a metal foil is irradiated with ultraviolet light of a specific wavelength may be used.

[0061] As a wet-type degreasing treatment, for example, treatments such as acid degreasing and alkaline degreasing may be used. As the acid used in acid degreasing, for example, inorganic acids such as sulfuric acid, nitric acid, hydrochloric acid, and hydrofluoric acid may be used. These acids may be used individually or in combination of two or more.

[0062] As the alkali used in the alkaline degreasing treatment, for example, sodium hydroxide, which has a high etching effect, may be used. Alternatively, the alkaline degreasing treatment may be performed using a material containing a weakly alkaline material and a surfactant. The wet-type degreasing treatment described above may be performed by, for example, immersion or spraying.

[0063] The thickness of the barrier layer 4 in the lamination direction D1 is not particularly limited, but from the viewpoint of barrier properties, pinhole resistance, processability, etc., it is, for example, 4.5 μm to 200 μm. If the thickness of the barrier layer 4 in the lamination direction D1 is 9 μm or more, it becomes less likely to break even when stress is applied during molding. If the thickness of the barrier layer 4 in the lamination direction D1 is 200 μm or less, the mass increase of the laminate 10 can be reduced.

[0064] From the viewpoint of the thermal diffusivity of the laminate 10, the ratio of the thickness of the barrier layer 4 to the thickness of the laminate 10 is, for example, 15% or more. From the viewpoint of the insulating properties of the laminate 10, the ratio of the thickness of the barrier layer 4 to the thickness of the laminate 10 is, for example, 50% or less. In other words, the ratio of the thickness of the barrier layer 4 to the thickness of the laminate 10 is between 15% and 50%.

[0065] The adhesive layer 5 is positioned between the sealant layer 6 and the barrier layer 4. The adhesive layer 5 is made of a material mainly composed of a thermoplastic resin. The adhesive layer 5 is the layer that adheres the sealant layer 6 and the barrier layer 4. The material of the adhesive layer 5 is not particularly limited as long as it contains a resin that adheres the sealant layer 6 and the barrier layer 4. From the viewpoint of adhesion and moisture barrier properties, the adhesive layer 5 may contain an acid-modified polyolefin or an acid-modified elastomer.

[0066] Acid-modified polyolefins may be polyolefin resins modified with maleic anhydride, carboxylic acids, sulfonic acids, and their derivatives. Examples of acid-modified polyolefins include graft copolymers, block copolymers, and random copolymers.

[0067] The acid-modified polyolefin may be a polyolefin resin graft-modified with maleic anhydride, from the viewpoint of adhesion to the barrier layer 4. Alternatively, the acid-modified polyolefin may contain a reaction product (hereinafter referred to as "reaction product X") of the acid-modified polyolefin and a polyfunctional isocyanate compound that is a curing agent.

[0068] The components for obtaining reaction product X may consist only of an acid-modified polyolefin and a polyfunctional isocyanate compound, or they may include other components in addition to the acid-modified polyolefin and the polyfunctional isocyanate compound.

[0069] Acid-modified polyolefins contain polar groups such as hydroxyl groups and carbone groups. From the viewpoint of reactivity, the hydroxyl value of acid-modified polyolefins is, for example, 5 KOH mg / g to 120 KOH mg / g or less.

[0070] Acid-modified polyolefins may also be polyolefins graft-modified with unsaturated carboxylic acid derivatives derived from unsaturated carboxylic acids, unsaturated sulfonic acids, acid anhydrides of unsaturated carboxylic acids, and esters of unsaturated carboxylic acids. In this case, the degree of acid modification in the acid-modified polyolefin is, for example, 2.0% by mass or less.

[0071] Examples of acid-modified polyolefins include maleic anhydride-modified polyolefins obtained by reacting maleic anhydride with a polyolefin. Examples of maleic anhydride-modified polyolefins include maleic anhydride-modified polypropylene and maleic anhydride-modified polyethylene.

[0072] Examples of polyfunctional isocyanate compounds include diisocyanates such as tolylene diisocyanate, xylylene diisocyanate or its hydrogenated products, hexamethylene diisocyanate, 4,4'-diphenylmethane diisocyanate or its hydrogenated products, and isophorone diisocyanate; or polyisocyanates such as adducts obtained by reacting these isocyanates with polyhydric alcohols such as trimethylolpropane, biuret compounds obtained by reacting them with water, or trimer isocyanurates (isocyanurate-type polyfunctional isocyanate compounds); or blocked polyisocyanates obtained by blocking these polyisocyanates with alcohols, lactams, oximes, etc.

[0073] The polyfunctional isocyanate compound may also contain an isocyanurate (isocyanurate-type polyfunctional isocyanate compound). In this case, the adhesive layer 5 can have good adhesion and heat resistance.

[0074] The adhesive layer 5 may contain various additives as needed, such as various compatible and incompatible elastomers, flame retardants, slip agents, antiblocking agents, antioxidants, light stabilizers, crystal nucleating agents, and tackifiers. The resin in the adhesive layer 5 can be analyzed using known analytical methods such as IR, NMR, various mass (mass) analysis methods, X-ray analysis, Raman spectroscopy, GPC, DSC, and DMA.

[0075] The sealant layer 6 is a layer that provides sealing properties to the laminate 10 by heat sealing (heat fusion). The sealant layer 6 is the innermost layer as described above and is the layer that is heat-sealed. The sealant layer 6 is formed of a material mainly composed of a thermoplastic resin. In this embodiment, the sealant layer 6 includes a polypropylene resin and a polyethylene resin.

[0076] In the sealant layer 6, the proportion of polypropylene resin to the total of polypropylene resin and polyethylene resin is, for example, 85% by mass or more and less than 100% by mass. In the sealant layer 6, the proportion of polyethylene resin to the total of polypropylene resin and polyethylene resin is, for example, greater than 0% by mass and 20% by mass or less.

[0077] From the viewpoint of the deformation rate of the sealant layer 6 under high-temperature conditions, the ratio of polypropylene resin to the total of polypropylene resin and polyethylene resin is, for example, 85% by mass or more. Furthermore, the above ratio is not particularly limited as long as it is less than 100% by mass, but for example, it is 98% by mass or less.

[0078] The polypropylene resin contained in the sealant layer 6 is, in one example, the base resin of the sealant layer 6. The polypropylene resin is a resin obtained from a polymer monomer containing propylene. Examples of polypropylene resins include homopolypropylene, block polypropylene, and random polypropylene. These may be used individually or in combination of two or more types.

[0079] From the viewpoint of the hardness of the laminate 10, the polypropylene resin may contain at least one of homopolypropylene and block polypropylene. In this case, the scratch resistance of the laminate 10 is improved compared to when the polypropylene is composed only of random polypropylene.

[0080] The crystallization temperature of polypropylene resin is not particularly limited, but is for example 100°C to 120°C. From the viewpoint of scratch resistance of the laminate 10, the crystallization temperature of polypropylene resin is, for example, 102°C or higher. The melting temperature (melting point) of polypropylene resin is, for example, 160°C to 168°C.

[0081] From the viewpoint of sealing performance in high-temperature environments, the melting point may be 162°C or higher. The difference between the melting temperature and the crystallization temperature is not particularly limited, and is, for example, 30°C to 70°C. From the viewpoint of balancing hardness and softness in the sealant layer 6, the difference between the melting temperature and the crystallization temperature may be 40°C to 65°C.

[0082] Polyethylene resins are resins obtained from polymerized monomers containing ethylene, and they play a role in imparting softness (stress relaxation). Examples of polyethylene resins include low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), and polyethylene elastomers. These may be used individually or in combination of two or more. From the viewpoint of imparting softness to the sealant layer 6, the polyethylene resin may also contain a polyethylene elastomer.

[0083] As polyethylene-based elastomers, elastomers using α-olefins as comonomers can be used. Specifically, examples of such polyethylene-based elastomers include compounds (copolymers) obtained by copolymerizing ethylene with an α-olefin composed of at least one selected from 1-butene, 1-pentene, 1-hexene, 1-octene, and 4-methyl-1-pentene.

[0084] Examples of such copolymers include polyethylene-butene copolymers, polyethylene-pentene copolymers, and polyethylene-hexene copolymers.

[0085] The polyethylene resin may contain a copolymer that functions as a compatibilizer. This copolymer exhibits the function of efficiently imparting softness by finely dispersing the polyethylene resin in the polypropylene resin, which is the base resin.

[0086] The above copolymer has, for example, a portion that is compatible with polypropylene resins (hereinafter referred to as "PP compatible portion") and a portion that is compatible with polyethylene resins (hereinafter referred to as "PE compatible portion"). Specific examples of the above copolymer include a graft copolymer in which the PP compatible portion is the main chain and the PE compatible portion is the side chain, a graft copolymer in which the PE compatible portion is the main chain and the PP compatible portion is the side chain, and a block copolymer in which the PP compatible portion and the PE compatible portion exist as blocks.

[0087] From the viewpoint of improving the dispersibility of polyethylene resins, the copolymer may be a block copolymer in which at least PP-compatible sites exist as blocks, or a block copolymer in which PP-compatible sites and PE-compatible sites each exist as blocks.

[0088] Examples of such block copolymers include block copolymers of polypropylene and polyethylene (PP·PE-block copolymer) and block copolymers of polyethylene and polyethylenebutylene (PE·PE-butylene block copolymer). In PE·PE-butylene block copolymer, the butylene portion corresponds to the PP compatible portion.

[0089] The crystallization temperature of polyethylene resins is not particularly limited, but is typically between 50°C and 90°C. The melting temperature (melting point) of polyethylene resins is typically greater than 70°C but less than or equal to 120°C.

[0090] If the crystallization temperature and melting temperature of the polyethylene resin are both within the above range, a good balance between the hardness and softness of the sealant layer 6 can be achieved. In this case, the stress applied to the sealant layer 6 during the manufacturing of the laminate 10 is more easily relieved.

[0091] For example, when the laminate 10 is transported by a roll and stress is applied to the sealant layer 6 from the roll, the rebound of stress from the roll toward the barrier layer 4 is suppressed. As a result, the surface of the sealant layer 6 becomes less susceptible to damage.

[0092] From the viewpoint of scratch resistance, etc., of the laminate 10, the crystallization temperature of the polyethylene resin is, for example, 55°C to 85°C. From the viewpoint of scratch resistance, etc., of the laminate 10, the melting temperature of the polyethylene resin is 80°C or higher. The temperature difference between the melting temperature and the crystallization temperature is not particularly limited, and is, for example, 10°C to 45°C. In the sealant layer 6, from the viewpoint of balancing hardness and softness, the temperature difference between the melting temperature and the crystallization temperature may be 15°C to 40°C.

[0093] The sealant layer 6 may also contain other additives as needed, such as slip agents, antiblocking agents, antioxidants, light stabilizers, nucleating agents, and flame retardants. The content of these additives is, for example, 5% by mass or less when the total mass of the sealant layer 6 is considered to be 100% by mass.

[0094] If the laminate 10 includes an adhesive layer 5 and a sealant layer 6, the adhesive layer 5 and the sealant layer 6 may be formed simultaneously by a T-die method, an inflation method, or other means, or they may be formed at different timings. In the latter case, the adhesive layer 5 and the sealant layer 6 may be bonded together with an adhesive. In this case, the adhesive may include acid-modified polypropylene and a curing agent (e.g., isocyanate) from the viewpoint of interfacial adhesion.

[0095] Polyethylene terephthalate (PET) film or polybutylene terephthalate (PBT) film may be used as the sealant layer 6. When a resin film is used as the sealant layer 6, it is preferable to attach the sealant layer 6 to the barrier layer 4 by dry lamination. Specifically, an adhesive coating film for forming the adhesive layer 5 is formed on the surface of the barrier layer 4. After drying this coating film at 80°C for 1 minute, for example, the film constituting the sealant layer 6 is attached. Then, aging is performed at 60°C for 6 days, for example. The thickness of the adhesive after drying may be, for example, 1 μm to 5 μm.

[0096] As shown in Figures 1 and 2, the packaging bag 1 comprises a storage section 1b and a sealing section 1a. The storage section 1b is the part in which the fire extinguishing film 30 is housed by the laminate 10. In the storage section 1b, the laminate 10 is arranged to sandwich the fire extinguishing film 30 with respect to the lamination direction D1. The laminate 10 is also arranged to sandwich the fire extinguishing film 30 with respect to the longitudinal direction D2 and the width direction D3. In this way, the fire extinguishing film 30 is surrounded by the laminate 10. In the storage section 1b, the laminate 10, the fire extinguishing film 30, and the laminate 10 are arranged side by side along the lamination direction D1. The fire extinguishing film 30 faces the sealant layer 6.

[0097] The seal portion 1a is located on the outside of the housing portion 1b in the longitudinal direction D2 and the width direction D3. The seal portion 1a is composed of a two-layer laminate 10. The seal portion 1a is a portion in which the laminate 10 has a two-layer structure in which the sealant layers 6 face each other, and the sealant layers 6 are heat-fused together. In the seal portion 1a, the two-layer laminate 10 is laminated facing opposite directions in the lamination direction D1. In Figure 2, for ease of explanation, two sealant layers 6 are shown, but the boundary lines of the sealant layers 6 are unclear because they are heat-fused together.

[0098] The sealing portion 1a is formed by overlapping one laminate 10, which has been processed to form a recess for accommodating the fire extinguishing film 30, with one flat laminate 10, and then heat-sealing the peripheral edges together. Alternatively, the sealing portion 1a may be formed by folding one laminate 10, which has been processed to form a recess for accommodating the fire extinguishing film 30, in half and then heat-sealing the peripheral edges together.

[0099] Figure 4 is an enlarged cross-sectional view showing the sealing portion 1a of a packaging bag 1 according to one embodiment. The sealing portion 1a has a first region A and a second region B in which the thickness of the sealant layer 6 is smaller than that of the first region A.

[0100] The thickness P1 of the sealant layer 6 in the first region A is, for example, 8 μm to 100 μm. The thickness P1 of the sealant layer 6 in the first region A is generally the same or approximately the same. The thickness P2 of the sealant layer 6 in the second region B is, for example, 7 μm to 70 μm. The thickness P2 of the sealant layer 6 in the second region B is generally the same or approximately the same. The thickness of the sealant layer 6 is the dimension of the sealant layer 6 in the lamination direction D1.

[0101] From the viewpoint of superior seal strength, the thickness P1 of the sealant layer 6 in region 1A may be 30 to 100 μm or 35 to 100 μm. Also, from the viewpoint of superior seal strength, the thickness P2 of the sealant layer 6 in region 2B may be 20 to 70 μm or 25 to 70 μm.

[0102] The total length Q of the second region B along the longitudinal direction D2 and the width direction D3, which are perpendicular to the stacking direction D1, is, for example, 2 mm or more. "Total length Q" means the sum of the lengths of the second region B along the longitudinal direction D2 and the width direction D3 in the seal portion 1a.

[0103] Therefore, the length of the second region B along the longitudinal direction D2 and the width direction D3 is not limited to the case where the seal portion 1a is formed by a single second region B. For example, if multiple second regions B are provided along the longitudinal direction D2 and the width direction D3 in the seal portion 1a, it means that the sum of the lengths of the multiple second regions B is, for example, 2 mm or more.

[0104] Therefore, the distance from the outer end to the inner end (the end on the fire extinguishing film 30 side) in the longitudinal direction D2 and width direction D3 of the seal portion 1a is longer than 2 mm. Furthermore, the thickness P2 of the sealant layer 6 in the second region B is smaller than the thickness P1 of the sealant layer 6 in the first region A. As a result, moisture is less likely to permeate the sealant layer 6 in the second region B compared to the sealant layer 6 in the first region A.

[0105] The second region B is located at the outer edges of the longitudinal direction D2 and the width direction D3, which are perpendicular to the lamination direction D1 in the seal portion 1a. In this way, the second region B is formed at a position away from the fire extinguishing film 30. Furthermore, since moisture entering from outside the packaging bag 1 immediately comes into contact with the second region B, it is possible to suppress moisture permeation in the sealant layer 6 at an early stage.

[0106] The end face Eb of the second region B in the stacking direction D1 has a recessed shape relative to the end face Ea of the first region A in the stacking direction D1. Specifically, the end face Eb of the second region B in the stacking direction D1 has a stepped or substantially stepped recessed shape relative to the end face Ea of the first region A in the stacking direction D1.

[0107] At the end of the sealing portion 1a in the stacking direction D1, a stepped portion Ec is provided, connecting the end face Ea and the end face Eb. The stepped portion Ec is a side surface that forms the boundary between the first region A and the second region B.

[0108] The end face Eb of the second region B in the stacking direction D1 does not have a shape that is inclined or curved so as to taper outward in the longitudinal direction D2 and the width direction D3 relative to the stacking direction D1. Therefore, the thickness P2 of the sealant layer 6 in the second region B does not have a structure that gradually decreases outward in the longitudinal direction D2 and the width direction D3.

[0109] The recessed shape described above will be explained in detail below with reference to Figures 5 to 8. Figure 5 is a cross-sectional view showing a method for manufacturing a packaging bag 1 according to one embodiment. The seal bar 41 shown in Figure 5 is a processing tool used in manufacturing the packaging bag 1 to press the laminated body 10, which has a two-layer structure, from both directions in the lamination direction D1.

[0110] The sealing bar 41 has a press surface 41a and a side surface 41b that is continuous with the press surface 41a. The sealing bars 41 are arranged on both sides of the laminate 10 in the lamination direction D1. Therefore, the press surfaces 41a are surfaces that face each other in the lamination direction D1.

[0111] The press surface 41a is the surface facing the base material layer 2 located at both ends of the lamination direction D1 of the two-layer laminate 10. The press surface 41a is flat throughout the entire length direction D2 and width direction D3. The laminate 10 is sealed by pressing it from both sides of the lamination direction D1 with the sealing bar 41. This is called the "first press". After that, the laminate 10 is shifted to one side in the width direction D3 (for example, to the left side in the plane of the paper in Figure 5), and the laminate 10 is pressed again with the sealing bar 41. This is called the "second press". The press pressure during the second press is greater than the press pressure during the first press.

[0112] As described above, by pressing twice, a first region A and a second region B are formed in the sealed portion 1a of the packaging bag 1. The press surface 41a of the seal bar 41 and the side surface 41b of the seal bar 41 are continuous with each other, including the corner. Therefore, when the laminate 10 is shifted to one side in the width direction D3 and pressed a second time, the end face Eb of the second region B in the stacking direction D1 will have a stepped recessed shape relative to the end face Ea of the first region A in the stacking direction D1. In other words, a stepped portion Ec will be formed between the end face Ea and the end face Eb. Since the two-layer laminate 10 is pressed from both sides of the stacking direction D1 by the seal bar 41, the stepped recessed shape is formed on both sides of the two-layer laminate 10 in the stacking direction D1.

[0113] As described above, the stepped recessed shape is formed on both sides of the two-layer laminate 10 in the stacking direction D1. However, the stepped recessed shape may be formed on only one side of the two-layer laminate 10 in the stacking direction D1. In this case, of the seal bars 41 provided on both sides in the stacking direction D1, only one seal bar 41 operates during the second press.

[0114] Figure 6 is a cross-sectional view showing a method for producing a modified packaging bag 1A. In this modified example, the laminate 10 is pressed only once, and the sealing bar 42 is used in the pressing, which differs from the above embodiment. In the modified example shown in Figure 6, the packaging bag 1A is produced by pressing with the sealing bar 42. In this modified example, the laminate 10 is not shifted to one side in the width direction D3.

[0115] The seal bar 42 has a press surface 42a. The seal bar 42 is positioned on both sides of the two-layer laminate 10 in the lamination direction D1. Therefore, the press surfaces 42a are surfaces that face each other in the lamination direction D1. At the same time, the press surface 42a is a surface that faces the laminate 10 in the lamination direction D1. A projection 42b is provided on one side of the press surface 42a (for example, the right side relative to the plane of the paper in Figure 6). The projection 42b protrudes from the seal bar 42 toward the laminate 10. The projection 42b has a cross-sectional shape that includes a corner. The projection 42b may be integrated with the press surface 42a or it may be a separate part.

[0116] The protrusion 42b creates a step in the stacking direction D1 on the press surface 42a. Therefore, the end face Eb of the second region B in the stacking direction D1 has a stepped shape that is recessed relative to the end face Ea of the first region A in the stacking direction D1. In other words, a step Ec is formed between the end face Ea and the end face Eb. Thus, with the seal bar 42, the same effect as when using only the seal bar 41 and pressing the laminate 10 twice after shifting it to one side in the width direction D3 can be obtained with a single press.

[0117] Figure 7 is a cross-sectional view showing a method for producing a packaging bag 1B according to another modified example. In this modified example, the laminate 10 is pressed only once, and the sealing bar 43 is used in the pressing, which differs from the above embodiment. In the modified example shown in Figure 7, the packaging bag 1B is produced by pressing with the sealing bar 43. In this modified example, the laminate 10 is not shifted to one side in the width direction D3.

[0118] The seal bar 43 has a press surface 43a. The seal bar 43 is positioned on both sides of the two-layer laminate 10 in the lamination direction D1. Therefore, the press surfaces 43a are surfaces that face each other in the lamination direction D1. At the same time, the press surface 43a is a surface that faces the laminate 10 in the lamination direction D1. A protrusion 43b having a rectangular cross-section is provided in the center of the width direction D3 of the press surface 43a. The protrusion 43b protrudes from the seal bar 43 toward the laminate 10 in the lamination direction D1. There is one protrusion 43b on the seal bar 43. The protrusion 43b may be integrated with the press surface 43a or it may be a separate part.

[0119] In this modified example, a recess (a concave shape) is formed in the center of the width direction D3 of the seal portion 1a by pressing. In other words, in this modified example, the second region B is formed in the center of the width direction D3. The first region A is formed on both the left and right sides of the second region B in the width direction D3. Therefore, two stepped portions Ec are formed in the seal portion 1a along the width direction D3.

[0120] The shape of the recess described above depends on the shape of the protrusion 43b, etc. That is, in this modified example, since there is only one protrusion 43b on the seal bar 43, one recess is formed in the laminate 10. Also, in this modified example, since the protrusion 43b has a rectangular cross-section, the corners of the recess have a shape that includes corners.

[0121] In this modified example, the recessed shape is formed in one location on the laminate 10, but the recessed shape may be formed in two or more locations on the laminate 10. That is, the seal bar 43 may have two or more protrusions 43b. Accordingly, the end face of the laminate 10 may have a striped shape when viewed from the lamination direction D1.

[0122] Furthermore, in this modified example, the corner of the recessed shape includes an angle, but the corner of the recessed shape may be rounded. That is, the protruding portion 43b may have a rounded corner in cross-section. In this case, the end face Eb of the second region B in the stacking direction D1 will have a shape that is recessed in a substantially stepped manner relative to the end face Ea of the first region A in the stacking direction D1.

[0123] Furthermore, the recessed shape may have a curved shape when viewed from the longitudinal direction D2. In this case as well, the end face Eb of the second region B in the stacking direction D1 will have a shape that is recessed in a step-like manner relative to the end face Ea of the first region A in the stacking direction D1. Moreover, the recessed shape may have a trapezoidal cross-section when viewed from the longitudinal direction D2. That is, the protruding portion 43b may have a trapezoidal cross-section. In this case, the end face Eb of the second region B in the stacking direction D1 will have a shape that is recessed in a step-like manner relative to the end face Ea of the first region A in the stacking direction D1.

[0124] Figure 8 is a plan view and a cross-sectional view showing the seal portion 1a of the packaging bag 1C according to another modification. Figure 8(a) is a plan view of the packaging bag 1C as seen from the stacking direction D1. Figure 8(b) is a cross-sectional view along the line VIII-VIII shown in Figure 8(a). Figure 8 shows the packaging bag 1C after pressing. In this modification, the stacked body 10 is not shifted to one side in the width direction D3.

[0125] In this modified example, the seal bar (not shown) has multiple protrusions on the press surface that have a rectangular cross-section. The protrusions of the seal bar are arranged at regular intervals along the longitudinal direction D2 and the width direction D3.

[0126] In the sealed portion 1a of the packaging bag 1C, the portion pressed by the sealing bar and the portion that is not pressed are arranged alternately along the longitudinal direction D2 and the width direction D3. That is, in the sealed portion 1a of the packaging bag 1C, the first region A and the second region B are arranged alternately along the longitudinal direction D2 and the width direction D3. Therefore, the shape in which the end face Eb of the second region B in the stacking direction D1 is recessed in a step-like manner relative to the end face Ea of the first region A in the stacking direction D1 is arranged alternately along the longitudinal direction D2 and the width direction D3. In other words, in the sealed portion 1a of the packaging bag 1C, the stepped portion Ec is formed in a staggered pattern when viewed from the stacking direction D1, and the end face of the laminate 10 in the stacking direction D1 has an embossed shape in which the end faces Ea and Eb are arranged alternately.

[0127] The total length Q of the second region B along the longitudinal direction D2 and the width direction D3 in the packaging bag 1C is the total length of the second region B which is formed in a staggered pattern along the longitudinal direction D2 and the width direction D3.

[0128] As described above, in this embodiment, a first region A and a second region B are formed in the seal portion 1a of the laminated body 10 which has a two-layer structure. The end face Eb of the second region B in the lamination direction D1 has a recessed shape with respect to the end face Ea of the first region A in the lamination direction D1. The thickness P2 of the sealant layer 6 in the second region B is smaller than the thickness P1 of the sealant layer 6 in the first region A. As a result, moisture is less likely to permeate the second region B than in the first region A. Also, the thickness P1 of the sealant layer 6 in the first region A is larger than the thickness P2 of the sealant layer 6 in the second region B. As a result, sufficient sealing strength can be obtained in the first region A compared to the second region B. Therefore, it is possible to suppress moisture permeation in the sealant layer 6 while ensuring sealing strength in the sealant layer 6. Furthermore, because moisture permeation in the sealant layer 6 can be suppressed, the water vapor barrier properties required for the fire extinguishing material package 50 can be provided.

[0129] Furthermore, in this embodiment, the end face Eb of the second region B in the stacking direction D1 has a stepped or substantially stepped recessed shape relative to the end face Ea of the first region A in the stacking direction D1. Therefore, by using seal bars 41 to 43 having a simple structure to heat-seal the sealant layers 6 of the two-layer laminate 10, the end face Eb of the second region B in the stacking direction D1 can be made recessed relative to the end face Ea of the first region A in the stacking direction D1. Consequently, manufacturing costs can be reduced.

[0130] Furthermore, in this embodiment, the second region B is located at the outer end of the longitudinal direction D2 and width direction D3 perpendicular to the lamination direction D1 in the seal portion 1a, or in the central part of the longitudinal direction D2 and width direction D3 in the seal portion 1a. Therefore, the second region B is formed at a position away from the fire extinguishing film 30. As a result, the seal strength on the fire extinguishing film 30 side of the seal portion 1a can be maintained. In addition, moisture that has entered from outside the packaging bag 1 can be brought into contact with the second region B more quickly. This makes it possible to further suppress the permeation of moisture in the sealant layer 6.

[0131] Furthermore, in this embodiment, the total length Q of the second region B along the longitudinal direction D2 and the width direction D3 perpendicular to the lamination direction D1 is 2 mm or more. Therefore, since the length of the second region B is sufficiently secured, the distance that moisture that has penetrated the sealant layer 6 travels before reaching the fire extinguishing film 30 can be increased. This makes it possible to reliably suppress the permeation of moisture in the sealant layer 6.

[0132] Furthermore, in this embodiment, the thickness P1 of the first region A is 60 μm to 150 μm, and the thickness P2 of the second region B is 45 μm to 100 μm. Therefore, the second region B is even less permeable to moisture than the first region A. Also, the first region A achieves even greater sealing strength than the second region B.

[0133] Furthermore, in this embodiment, the sealant layer 6 is made of a material mainly composed of a thermoplastic resin. Therefore, the sealant layer 6 softens when heated and hardens when cooled. As a result, the two layers of the laminate 10 are tightly bonded together by heat fusion, forming a seal portion 1a with excellent sealing properties.

[0134] Furthermore, in this embodiment, an adhesive layer 5 is placed between the sealant layer 6 and the barrier layer 4. Therefore, the adhesive layer 5 promotes adhesion between the sealant layer 6 and the barrier layer 4. This improves the strength and durability of the laminate 10.

[0135] Furthermore, in this embodiment, the adhesive layer 5 is made of a material mainly composed of a thermoplastic resin. Therefore, the adhesive layer 5 softens when heated and hardens when cooled. Thus, the adhesive layer 5 has the same function as the sealant layer 6. Consequently, the adhesive layer 5 and the sealant layer 6 of the two-layer laminate 10 adhere to each other by thermal fusion, forming a seal portion 1a with excellent sealing properties.

[0136] Furthermore, in this embodiment, the adhesive layer 5 contains an acid-modified polyolefin or an acid-modified elastomer. Therefore, the adhesive layer 5 has good adhesion to the metal surface. This forms a strong bond between the sealant layer 6 and the barrier layer 4. Consequently, delamination between the sealant layer 6 and the barrier layer 4 can be suppressed.

[0137] This disclosure is not limited to the embodiments described above. For example, in the embodiments described above, the second region B is located at the outer end of the seal portion 1a in the longitudinal direction D2 and the width direction D3, but the invention is not limited to such a configuration. For example, the second region B may be located at the inner end (fire extinguishing film 30 side) of the seal portion 1a in the longitudinal direction D2 and the width direction D3. Even in this case, moisture permeation can be suppressed in the second region B as in the embodiments described above.

[0138] Furthermore, in the above embodiment, the end face Eb of the second region B in the stacking direction D1 has a stepped or substantially stepped recessed shape relative to the end face Ea of the first region A in the stacking direction D1, but it is not limited to such a shape. For example, the end face Eb of the second region B in the stacking direction D1 may have a U-shaped or V-shaped cross-section recessed relative to the end face Ea of the first region A in the stacking direction D1.

[0139] [Fire extinguisher] The fire extinguishing film 30 is an example of a fire extinguishing body. As shown in Figure 2, the fire extinguishing film 30 comprises a fire extinguishing agent layer 31 containing a fire extinguishing agent and a resin film 32 supporting the fire extinguishing agent layer 31. The fire extinguishing agent layer 31 may further contain a binder resin and a deliquescence inhibitor component. The thickness of the fire extinguishing agent layer 31 is, for example, 30 to 600 μm. The thickness of the resin film 32 is, for example, 5 to 100 μm. The overall thickness of the fire extinguishing film 30 is, for example, 35 to 800 μm. When the contents are a fire extinguishing film, the thickness P1 of the sealant layer 6 in the first region A is, for example, 30 μm to 100 μm. The thickness P2 of the sealant layer 6 in the second region B is, for example, 25 μm to 70 μm.

[0140] (Fire extinguishing agent) As a fire extinguishing agent, one is used that possesses the four elements of fire extinguishing (removal action, cooling action, suffocation action, and negative catalytic action) depending on the target of the fire. The fire extinguishing agent contains at least one of an organic salt and an inorganic salt. Organic salts and inorganic salts may be used individually or in combination of two or more. Examples of organic salts that function as fire extinguishing agents include potassium salts, sodium salts, and ammonium salts. From the viewpoint of usefulness for negative catalytic effect, potassium salts can be suitably used as organic salts. Examples of organic potassium salts include potassium acetate, potassium citrate (monotpotassium citrate, dipotassium citrate, tripotassium citrate), potassium tartrate, potassium lactate, potassium oxalate, potassium maleate, and other potassium carboxylate salts. Among these, organic potassium salts that are hygroscopic include potassium acetate, potassium citrate, potassium tartrate, and potassium lactate. Of these, potassium citrate can be used in particular from the viewpoint of reaction efficiency of the negative catalytic effect of combustion.

[0141] Examples of inorganic salts that function as fire extinguishing agents include potassium salts and sodium salts. From the viewpoint of usefulness for negative catalytic effects, potassium salts can be suitably used as inorganic salts. Examples of inorganic potassium salts include potassium tetraborate, potassium carbonate, potassium bicarbonate, potassium dihydrogen phosphate, and dipotassium hydrogen phosphate. Among these, examples of inorganic potassium salts that are hygroscopic include potassium carbonate, potassium dihydrogen phosphate, and dipotassium hydrogen phosphate. Of these, potassium carbonate can be used in particular from the viewpoint of reaction efficiency of the negative catalytic effect of combustion.

[0142] (Binder resin) The inclusion of a binder resin in the fire extinguishing agent layer 31 improves the moldability of the fire extinguishing agent layer 31. For example, thermoplastic resins and thermosetting resins can be used as the binder resin.

[0143] Examples of thermoplastic resins include polypropylene resins, polyethylene resins, poly(1-)butene resins, polypentene resins and other polyolefin 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), polyvinyl acetal resins, and polyurethane resins. Of these resins, polyvinyl acetal resins and polyurethane resins can be suitably used from the viewpoint of film-forming properties. Examples of polyvinyl acetal resins include polyvinyl butyral (PVB). Of the above thermoplastic resins, polyurethane resins can be suitably used from the viewpoint of achieving both film-forming properties and improved reactivity. In addition to achieving both of these, ether-based polyurethane resins can be suitably used from the viewpoint of providing flexibility to the coating film and water resistance to the fire extinguishing material.

[0144] 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), polyvulcanized rubber (T), silicone rubber (Q), fluororubber (FKM, FZ), urethane rubber (U), and other types of rubber, as well as polyurethane resins, polyisocyanate resins, polyisocyanurate resins, phenolic resins, epoxy resins, and polyvinyl ether (PMVE)-anhydrous malee resins.

[0145] (Deliquescence suppressing ingredient) By including deliquescence-inhibiting components in the fire extinguishing agent layer, the resistance of the fire extinguishing agent layer to deliquescence can be improved. Examples of deliquescence-inhibiting components include compounds having acid anhydride groups. The reason why compounds having acid anhydride groups exert a deliquescence-inhibiting effect is not entirely clear, but it is presumed that because acid anhydride groups can react with water, they trap water that has entered the fire extinguishing agent layer, thereby preventing the deliquescence of the salts contained in the fire extinguishing agent layer. It is also presumed that compounds having acid anhydride groups modify the surface of the salts, improving their hydrophobicity and suppressing contact with water.

[0146] Compounds having an acid anhydride group are not particularly limited as long as they have one or more acid anhydride groups in their molecule, which are formed by the dehydration condensation of two oxoacid molecules. Examples of oxoacids constituting the acid anhydride group include carboxylic acids, sulfuric acid, nitric acid, and phosphoric acid. Of these, the oxoacid constituting the acid anhydride group is preferably a carboxylic acid. Examples of compounds having a carboxylic acid anhydride group include elemental carboxylic acid anhydrides such as phthalic anhydride, succinic anhydride, and maleic anhydride, or copolymers in which an unsaturated carboxylic acid anhydride such as maleic anhydride is used as a monomer.

[0147] Compounds having acid anhydride groups may further contain alkoxysilyl groups in their molecules. The presence of alkoxysilyl groups in the acid anhydride group compound contained in the fire extinguishing agent layer allows for more stable maintenance of the molded article's properties over a longer period. While the exact reason is unclear, it is presumed that after the hydrolysis of the alkoxysilane, a self-reaction occurs to form a siloxane, improving water resistance and film density, thereby suppressing contact between the hygroscopic salt and water. As a compound having both acid anhydride and alkoxysilyl groups in its molecule, for example, a silane coupling agent may be used. The silane coupling agent used as the acid anhydride group compound may have the same function as the binder resin in the fire extinguishing agent layer.

[0148] The content of compounds having acid anhydride groups in the fire extinguishing agent layer is, for example, 0.1 to 15% by mass, preferably 1 to 10% by mass, and more preferably 3 to 8% by mass, based on the total mass of the fire extinguishing agent layer. When the content of compounds having acid anhydride groups is below the above upper limit, the coating suitability of the fire extinguishing agent layer is improved, making it easier to form a film, and cracking of the film can also be suppressed. On the other hand, when the content of compounds having acid anhydride groups is above the above lower limit, deliquescence of salt is easily suppressed and sufficient fire extinguishing performance is easily achieved.

[0149] <Electrical Equipment> Electrical equipment includes a fire-prone object and a fire extinguishing material package positioned facing the fire-prone object. Examples of electrical equipment include electrical systems equipped with electrical wiring, cables, transformers, and electrical circuits. More specific examples include distribution boards, switchboards, storage batteries (e.g., lithium-ion batteries) and energy storage systems that incorporate these. Examples of storage batteries include mobile batteries, tool batteries, and electric vehicle batteries. In addition to these examples, other areas with a risk of unintended fire include storage battery collection boxes, trash cans, and outlet covers. The following provides specific examples of electrical equipment.

[0150] Electrical equipment comprises electrical devices and enclosures that house them. Examples of electrical equipment include power receiving and transforming equipment such as distribution boards and switchboards, and equipment such as operation panels and control panels for production equipment. Examples of electrical devices include terminal blocks, transformers, circuit breakers, capacitors, earth leakage circuit breakers, electrical wiring, storage batteries, and outlets installed in these panels. These electrical devices can be considered parts of electrical equipment that pose a fire hazard. Electrical equipment usually contains multiple electrical devices, and a fire extinguishing material package may be installed for at least one of these electrical devices, or for each of the electrical devices. A single fire extinguishing material package may be installed facing multiple electrical devices. By pre-installing the above-mentioned fire extinguishing material packages within these electrical equipment, the occurrence and spread of fire can be prevented.

[0151] Figure 9 is a schematic perspective view showing the electrical equipment according to this embodiment. Figure 9 shows a distribution board as an example of electrical equipment. The electrical equipment 100 mainly comprises a housing 101 having a housing section 101a for housing electrical equipment and an opening / closing door 101b, and a circuit breaker 103 and wiring 104 as electrical equipment. Part of the wiring 104 is housed together in a wiring cover 102. For example, the electrical equipment 100 may be equipped with a fire extinguishing material package 50a on the side of the opening / closing door 101b facing the electrical equipment, a fire extinguishing material package 50b on the top surface of the housing section 101a facing the electrical equipment, a fire extinguishing material package 50c on the bottom surface of the wiring cover 102 facing the electrical equipment (approximate installation position shown in the figure for simplicity), and a fire extinguishing material package 50d on the side of the back of the housing section 101a facing the electrical equipment, i.e., on the back of the electrical equipment.

[0152] The placement of the fire extinguishing material package is not limited to the configuration shown in Figure 9, and its position can be adjusted as appropriate depending on the arrangement of electrical equipment and other parts that pose a fire hazard. Furthermore, if the distance between the fire extinguishing material package and the electrical equipment is large, a member for adjusting the distance may be provided, and the fire extinguishing material package may be placed on that member.

[0153] In this embodiment, an example was given of a case where a fire-extinguishing film is contained in a packaging bag. However, the contents contained in the packaging bag are not limited to fire-extinguishing film, as long as they are delicate items that need to be protected from moisture and water vapor. Specific examples of such contents include ancient documents, paintings, photographs, and hanging scrolls. [Examples]

[0154] This disclosure will be illustrated in more detail by the following test examples, but this disclosure is not limited to these examples.

[0155] <Base material layer> The following films were prepared as resin films to constitute the base layer of the packaging material. • 25μm thick nylon film (manufactured by Toyobo Co., Ltd., product name: Harden N112) • 25μm thick polyethylene terephthalate film (manufactured by Toray Industries, Inc., product name: Lumirror S10) Furthermore, one side of the polyethylene terephthalate film was treated with corona.

[0156] <First adhesive> A two-component curing adhesive was prepared to bond the substrate layer and the metal foil layer. A polyester polyol resin (manufactured by Mitsui Chemicals, trade name Takelac A-515 (solid content concentration 50% by mass)) was used as the main component. An isocyanate compound (manufactured by Mitsui Chemicals, trade name Takenate D-140N (solid content concentration 74% by mass)) was used as the curing agent. The mixture was prepared so that the solid content mass ratio of main component:curing agent = 80:20, and the total solid content was adjusted to 20%.

[0157] <Barrier layer (thickness 40 μm)> We prepared soft aluminum foil (manufactured by Toyo Aluminum Co., Ltd., "8079 material") that had undergone a scorching and degreasing treatment.

[0158] <Second adhesive layer> As a resin composition for bonding the metal foil layer and the sealant layer, a random polypropylene-based acid-modified polypropylene resin composition (manufactured by Mitsui Chemicals, trade name QF551) was prepared.

[0159] <Sealant layer (for extruded lamination)> We prepared a polypropylene-polyethylene random copolymer (manufactured by Prime Polymer, trade name F744NP).

[0160] <Third Adhesive> A two-component curing adhesive was prepared to bond the metal foil layer and the sealant layer. An acid-modified polyolefin resin (manufactured by Toyobo Co., Ltd., product name: TD-15B) was prepared as the main component. An isocyanate compound (manufactured by Mitsui Chemicals, product name: Takenate D-140N (solid content concentration 74% by mass)) was prepared as the curing agent. The solid content was adjusted so that the mass ratio of main component to curing agent was 90:10, and the total solid content was adjusted to 10%.

[0161] <Sealant layer (for dry lamination)> The following films were prepared as sealant layers for dry lamination. • 50μm thick polypropylene film (manufactured by Okamoto Co., Ltd., product name: ET) • 50μm thick PET film (manufactured by Toyobo Co., Ltd., product name: DE046) • 50μm thick polybutylene terephthalate film (manufactured by Kojinsha, product name: Boblet CF)

[0162] (Test Example 1) [Manufacturing of packaging materials] A barrier layer was bonded to a substrate layer using a first adhesive to form the first adhesive layer by a dry lamination method. Specifically, the adhesive was applied to the barrier layer so that its thickness after drying was 4 μm. Subsequently, the adhesive was dried at 80°C for 1 minute, and then the substrate layer and the barrier layer were bonded together. After that, the layers were aged at 60°C for 6 days. As a result, a laminate (intermediate laminate) having the configuration of a substrate layer / first adhesive layer / barrier layer was obtained.

[0163] A second adhesive layer and a sealant layer (for extrusion lamination) were formed on the surface of the barrier layer of the above-mentioned intermediate laminate using a co-extrusion method with an extrusion laminating machine, in that order. The thickness of the second adhesive layer in lamination direction D1 was 14 μm. The thickness of the polypropylene-polyethylene random copolymer layer (sealant layer) in lamination direction D1 was 36 μm. Since the second adhesive layer also functions as a sealant layer, the total thickness of the sealant layer was 50 μm. Thus, a packaging material with a layer structure of base material layer / first adhesive layer / barrier layer / second adhesive layer / sealant layer was obtained.

[0164] [Production of packaging] First, two pieces of the fabricated laminate were cut out and stacked with the sealant layers facing each other. Next, the three sides were heat-sealed and the sealant layers were heat-fused together to create a structure with an internal size of 100mm x 45mm.

[0165] The heat sealing was performed using the following procedure. First, a 10 mm wide sealing bar was used to perform the first press on the periphery of the laminate. The first press was performed at a temperature of 200°C, a press pressure of 0.25 MPa, and a pressing time of 2 seconds. Next, a second press was performed on the heat-fused sealant layer. The second press was performed at 200°C, a press pressure of 0.5 MPa, and a pressing time of 2.5 seconds.

[0166] Subsequently, 3g of ethylene glycol was injected through the open side, and the package was sealed by heat sealing under the same conditions along the open side to create a package.

[0167] In the sealed portion of the resulting packaging, the thickness of the sealant layer in the first region was 93 μm, and the thickness of the sealant layer in the second region was 61 μm. This means that the total thickness of the pair of superimposed sealant layers was 100 μm, and this thickness became 93 μm after the first press and 61 μm after the second press. Furthermore, the length of the laminate in the first region perpendicular to the lamination direction was 8 mm, and the length of the laminate in the second region perpendicular to the lamination direction was 2 mm.

[0168] (Test Example 2) A package was prepared in the same manner as in Test Example 1, except that the sealing conditions, press pressure, and press time were adjusted as appropriate. In the sealed portion of the obtained package, the thickness of the sealant layer in the first region was 70 μm, and the thickness of the sealant layer in the second region was 51 μm. In addition, the length of the laminate in the first region perpendicular to the lamination direction was 8 mm, and the length of the laminate in the second region perpendicular to the lamination direction was 2 mm.

[0169] (Test Example 3) A package was prepared in the same manner as in Test Example 1, except that the sealing conditions, press pressure, and press time were adjusted as appropriate. In the sealed portion of the obtained package, the thickness of the sealant layer in the first region was 50 μm, and the thickness of the sealant layer in the second region was 41 μm. In addition, the length of the laminate in the first region perpendicular to the lamination direction was 8 mm, and the length of the laminate in the second region perpendicular to the lamination direction was 2 mm.

[0170] (Test example 4) A package was prepared in the same manner as in Test Example 1, except that the thickness of the second adhesive layer and the polypropylene-polyethylene random copolymer layer (sealant layer) were set to 8 μm and 22 μm, respectively, instead of 14 μm and 36 μm, respectively. In the sealed portion of the obtained package, the thickness of the sealant layer in the first region was 39 μm, and the thickness of the sealant layer in the second region was 28 μm. In addition, the length of the laminate in the first region perpendicular to the lamination direction was 8 mm, and the length of the laminate in the second region perpendicular to the lamination direction was 2 mm.

[0171] (Test Example 5) A package was prepared in the same manner as in Test Example 1, except that the sealing conditions, press pressure, and press time were adjusted as appropriate. In the sealed portion of the obtained package, the thickness of the sealant layer in the first region was 72 μm, and the thickness of the sealant layer in the second region was 51 μm. In addition, the length of the laminate in the first region perpendicular to the lamination direction was 5 mm, and the length of the laminate in the second region perpendicular to the lamination direction was 5 mm.

[0172] (Test Example 6) A package was prepared in the same manner as in Test Example 1, except that the sealing conditions, press pressure, and press time were adjusted as appropriate. In the sealed portion of the obtained package, the thickness of the sealant layer in the first region was 19 μm, and the thickness of the sealant layer in the second region was 18 μm. In addition, the length of the laminate in the first region perpendicular to the lamination direction was 8 mm, and the length of the laminate in the second region perpendicular to the lamination direction was 2 mm.

[0173] (Test Example 7) The packaging was prepared in the same manner as in Test Example 1, except that a second pressing was not performed. In the sealed portion of the obtained packaging, the thickness of the sealant layer in the first region was 90 μm, and the length of the laminate in the first region perpendicular to the lamination direction was 10 mm.

[0174] (Test Example 8) The packaging was prepared in the same manner as in Test Example 2, except that a second pressing was not performed. In the sealed portion of the obtained packaging, the thickness of the sealant layer in the first region was 70 μm, and the length of the first region in the direction perpendicular to the lamination direction of the laminate was 10 mm. In Test Example 8, since a second pressing was not performed during preparation, the sealant layer does not have a second region.

[0175] (Test Example 9) First, two laminates prepared in the same manner as in Test Example 1 were cut out and stacked with the sealant layers facing each other. Next, the three sides were heat-sealed and the sealant layers were heat-fused to join them so that the internal size was 100 mm x 45 mm.

[0176] The heat sealing was performed by heat-sealing the sealant layer using a 10 mm wide sealing bar, so that the thickness in the lamination direction gradually decreased outward from the longitudinal and widthwise directions of the laminate. Then, 3 g of ethylene glycol was injected from the open side, and the package was sealed by heat-sealing the open side under the same conditions to create the package.

[0177] In the resulting packaging, the outer portions in the longitudinal or widthwise direction of the laminate are inclined with respect to the horizontal direction along the longitudinal or widthwise direction. In the sealed portion of the resulting packaging, the thickness of the sealant layer was 88 μm at its thickest point and 59 μm at its thinnest point.

[0178] [Seal strength] For each of the obtained packaging materials, a T-shaped peel test was performed using a tensile testing machine (manufactured by Shimadzu Corporation) at room temperature (25°C) and a tensile speed of 50 mm / min to measure the seal strength (unit: N / 10 mm) by separating the heat-fused sealant layers. The results are shown in Table 1.

[0179] [Evaluation of water permeability] First, the obtained packaging was left for 7 days in an environment of 80°C and 90% RH (relative humidity). Next, the moisture content of the ethylene glycol contained in the packaging was measured using a Karl Fischer moisture meter, and the amount of permeate was calculated using the following formula (1). Permeated water content (mass ppm) = Moisture content (mass ppm) of ethylene glycol contained in the packaging bag after 7 days of storage - Moisture content (mass ppm) of ethylene glycol before injection into the packaging bag ... (1)

[0180] [Table 1] *1: The thickness of the thickest part of the sealed area formed by heat-sealing two pieces of packaging material. *2: The thickness of the thinnest part of the sealed area formed by heat-sealing two pieces of packaging material.

[0181] Test Examples 1-6 correspond to examples, and Test Examples 7-9 correspond to comparative examples. As shown in Table 1, in the packaging of Test Examples 1-6, the seal strength in the sealant layer is ensured while the permeation of moisture in the sealant layer is suppressed. This is presumed to be due to the provision of a first region and a second region with specific thicknesses in the sealant layer of the packaging bag. By housing the fire extinguishing material in such a packaging bag, a fire extinguishing material package can be obtained in which the seal strength in the sealant layer is ensured while the permeation of moisture in the sealant layer is suppressed.

[0182] (Test Example 10) A second adhesive layer and a sealant layer (polypropylene film: 50 μm) were laminated in this order onto the surface of the barrier layer of the intermediate laminate obtained in the same manner as in Test Example 1. Specifically, the second adhesive was applied to the barrier layer of the intermediate laminate so that its thickness after drying was 4 μm. After drying the second adhesive at 80°C for 1 minute, it was bonded to the sealant layer. Then, it was aged at 60°C for 6 days. As a result, a packaging material with a layer structure of base material layer / first adhesive layer / barrier layer / second adhesive layer / sealant layer was obtained. In Test Example 10, the thickness of the sealant layer 6 in the first region A after the second press was set to 69 μm. The thickness of the sealant layer 6 in the second region B after the second press was set to 49 μm. The length of the first region A in the longitudinal direction D2 and the width direction D3 was set to 8 mm. The length of the second region B in the longitudinal direction D2 and the width direction D3 was set to 2 mm.

[0183] (Test Example 11) The packaging was prepared using the same method as in Test Example 10, except that a 50 μm thick polybutylene terephthalate film was used as the sealant layer. In Test Example 11, the thickness of the sealant layer 6 in the first region A after the second press was set to 81 μm. The thickness of the sealant layer 6 in the second region B after the second press was set to 58 μm. The length of the first region A in the longitudinal direction D2 and the width direction D3 was set to 8 mm. The length of the second region B in the longitudinal direction D2 and the width direction D3 was set to 2 mm.

[0184] (Test Example 12) Except for using a 25 μm thick PET film as the resin film constituting the base layer, the packaging was prepared using the same method as in Test Example 10. In Test Example 12, the thickness of the sealant layer 6 in the first region A after the second press was set to 70 μm. The thickness of the sealant layer 6 in the second region B after the second press was set to 51 μm. The length of the first region A in the longitudinal direction D2 and the width direction D3 was set to 8 mm. The length of the second region B in the longitudinal direction D2 and the width direction D3 was set to 2 mm.

[0185] (Test Example 13) Except for using a 50 μm thick PET film as the sealant layer, the packaging was prepared using the same method as in Test Example 10. In Test Example 13, the thickness of the sealant layer 6 in the first region A after the second press was set to 85 μm. The thickness of the sealant layer 6 in the second region B after the second press was set to 60 μm. The length of the first region A in the longitudinal direction D2 and the width direction D3 was set to 8 mm. The length of the second region B in the longitudinal direction D2 and the width direction D3 was set to 2 mm.

[0186] (Test Example 14) Except for using a 50 μm thick PBT film as the resin film constituting the sealant layer, the packaging was prepared using the same method as in Test Example 12. In Test Example 14, the thickness of the sealant layer 6 in the first region A after the second press was set to 82 μm. The thickness of the sealant layer 6 in the second region B after the second press was set to 57 μm. The length of the first region A in the longitudinal direction D2 and the width direction D3 was set to 8 mm. The length of the second region B in the longitudinal direction D2 and the width direction D3 was set to 2 mm.

[0187] (Test Example 15) Except for not including the second region B, the packaging was prepared using the same method as in Test Example 13. In Test Example 15, the thickness of the sealant layer 6 in the first region A after the first press was set to 84 μm. The length of the first region A in the longitudinal direction D2 and the width direction D3 was set to 10 mm.

[0188] Table 2 shows the evaluation results for Test Examples 10-15. Test Examples 10-14 correspond to examples, and Test Example 15 corresponds to a comparative example. As for the film constituting the sealant layer, Test Example 11 uses a PBT film, and Test Example 13 uses a PET film. Even when these polyester resin films are used as the film constituting the sealant layer, it was shown that by providing a second region in the seal area, moisture permeation is suppressed and the decrease in seal strength is suppressed compared to the case where a second region is not provided in the seal area (Test Example 15).

[0189] [Table 2]

[0190] This disclosure relates to the following invention. [1] A fire extinguishing body having a fire extinguishing agent layer containing a fire extinguishing agent, It is composed of a laminate having at least a base layer, an adhesive layer, a barrier layer, and a sealant layer in this order from the outside to the inside, and the packaging bag containing the fire extinguishing body, Equipped with, The packaging bag has a receiving section for containing the fire extinguishing body by the laminate, and a sealing section located on the outside of the receiving section in a direction perpendicular to the lamination direction of the laminate, wherein the laminate has a two-layer structure with the sealant layers facing each other and the sealant layers are heat-fused together. The sealing portion has a first region and a second region in which the thickness of the sealant layer is smaller than that of the first region. A fire extinguishing material package wherein the end face of the second region in the stacking direction has a shape that is recessed relative to the end face of the first region in the stacking direction. [2] The fire extinguishing material package according to [1], wherein the end face of the second region in the stacking direction is recessed in a stepped or substantially stepped manner relative to the end face of the first region in the stacking direction. [3] The fire extinguishing material package according to [1] or [2], wherein the total length of the second region in the direction perpendicular to the stacking direction is 2 mm or more. [4] The thickness of the first region in the stacking direction is 30 to 100 μm. The fire extinguishing material package according to any one of [1] to [3], wherein the thickness of the second region in the stacking direction is 25 to 70 μm. [5] The fire extinguishing material package according to any one of [1] to [4], wherein the sealant layer is formed of a material mainly composed of thermoplastic resin. [6] A fire extinguishing material package according to any one of [1] to [5], comprising the aforementioned fire extinguishing agent potassium citrate and potassium chlorate. [7] The fire extinguishing material package according to any one of [1] to [6], wherein the fire extinguishing layer further comprises a compound having an acid anhydride group. [8] A fire extinguishing material package described in any one of [1] to [7], The object to be extinguished by the aforementioned fire extinguishing material package is an electrical device, Electrical equipment equipped with the following features. [Explanation of Symbols]

[0191] 1, 1A, 1B, 1C... Packaging bag, 1a... Seal part, 1b... Storage part, 2... Base material layer, 3... Adhesive layer, 4... Barrier layer, 5... Adhesive layer, 6... Sealant layer, 10... Laminate, 30... Fire extinguishing film (fire extinguishing body), 31... Fire extinguishing agent layer, 32... Resin film, 50, 50a, 50b, 50c, 50d... Fire extinguishing material package, 100... Electrical equipment, 101... Housing, 101a... Storage part, 101b... Opening / closing door, 102... Wiring cover, 103... Circuit breaker, 104... Wiring, A... First area, B... Second area, D1... Lamination direction, D2... Longitudinal direction, D3... Width direction, Ea... End face, Eb... End face, Ec... Stepped part, P1... Thickness, P2... Thickness.

Claims

1. A fire extinguishing body having a fire extinguishing agent layer containing a fire extinguishing agent, It is composed of a laminate having at least a base layer, an adhesive layer, a barrier layer, and a sealant layer in this order from the outside to the inside, and the packaging bag containing the fire extinguishing body, Equipped with, The packaging bag has a receiving section for containing the fire extinguishing body by the laminate, and a sealing section located on the outside of the receiving section in a direction perpendicular to the lamination direction of the laminate, wherein the laminate has a two-layer structure with the sealant layers facing each other and the sealant layers are heat-fused together. The sealing portion has a first region and a second region in which the thickness of the sealant layer is smaller than that of the first region. A fire extinguishing material package wherein the end face of the second region in the stacking direction has a shape that is recessed relative to the end face of the first region in the stacking direction.

2. The fire extinguishing material package according to claim 1, wherein the end face of the second region in the stacking direction has a stepped or substantially stepped recessed shape relative to the end face of the first region in the stacking direction.

3. The fire extinguishing material package according to claim 1, wherein the total length of the second region in the direction perpendicular to the stacking direction is 2 mm or more.

4. The thickness of the first region in the stacking direction is 30 to 100 μm. The fire extinguishing material package according to claim 1, wherein the thickness of the second region in the stacking direction is 25 to 70 μm.

5. The fire extinguishing material package according to claim 1, wherein the sealant layer is formed of a material mainly composed of a thermoplastic resin.

6. The fire extinguishing material package according to claim 1, wherein the fire extinguishing agent comprises potassium citrate and potassium chlorate.

7. The fire extinguishing material package according to claim 1, wherein the fire extinguishing agent layer further comprises a compound having an acid anhydride group.

8. A fire extinguishing material package according to any one of claims 1 to 7, The object to be extinguished by the aforementioned fire extinguishing material package is an electrical device, Electrical equipment equipped with the following features.

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