JP2022171060A - Laminate for extinguishing fire and electronic member - Google Patents

Abstract

To provide a laminate for extinguishing fire that can resist swelling even in an environment containing water vapor.SOLUTION: A laminate for extinguishing fire has: a pair of substrates; and a fire extinguisher-containing layer that is disposed between the pair of substrates and contains a fire extinguisher component to generate aerosol by combustion and a binder resin. The substrates have a water vapor permeability (JISK7129, 40°C/90% RH) of 15 g/m2/day or less.SELECTED DRAWING: Figure 1

Description

The present invention relates to fire-fighting laminates and electronic components.

In recent years, with the advancement of technology, our lives have become more and more comfortable, but a large amount of energy is required to create that comfort. For example, many of the electrical appliances that are indispensable in our lives, such as air conditioners, refrigerators, and washing machines, are connected to wiring plug-in connectors (outlets) and operate by being supplied with electricity. Smartphones and electric vehicles are also powered by electricity charged in lithium-ion batteries.

By the way, a fire is likely to occur in a place where electricity flows. For example, in a switchboard, damage to a cable may cause electric leakage or heat generation, and if combustible materials such as dust come into contact with current-carrying parts, it may cause a fire. If there is dust or other flammable material around the plug-in connector for direct wiring (outlet), the static electricity generated when plugging in and unplugging the outlet may ignite and cause a fire. Power conditioners used in power generation facilities such as photovoltaic power generation also generate heat due to increased resistance due to poor construction, etc., and rust due to salt damage, which causes openings and tracking due to water intrusion. Sometimes. Lithium-ion batteries can also ignite due to sudden heat generation if a short circuit occurs due to internal impurities or impact, which may lead to a fire.

For such fires, Patent Literature 1 proposes the use of a fire extinguisher and a fire extinguisher. Patent Document 2 proposes the use of a fire extinguishing composition containing an alkali metal salt such as potassium nitrate or potassium perchlorate.

JP-A-9-276440 Japanese Patent Publication No. 7-503159

However, Patent Literature 1 proposes a method for coping with a fire after a certain amount of time has passed. On the other hand, from the viewpoint of minimizing the damage caused by fire, it is desirable to extinguish the fire immediately after the ignition (initial extinguishing). In addition, since the spray is a fire extinguishing liquid containing water as a liquid, when it is sprayed on electrical equipment, it causes short circuits, tracking destruction, corrosion of metal parts, etc., and damages other than fire parts.

Further, in the case of using a fire-extinguishing composition such as that disclosed in Patent Document 2, if the composition contains water due to moisture absorption or condensation due to temperature changes, it expands and becomes unable to maintain its initial dimensions. From the viewpoint of initial fire extinguishing, it is preferable to use a fire-extinguishing laminate prepared using a fire-extinguishing composition in the vicinity of a material with a high risk of ignition such as a battery, but if the initial dimensions cannot be maintained, it is not recommended. It is difficult to use in places where This is because, for example, in an electronic component in which various parts are densely integrated, there is a possibility that the fire extinguishing laminated body, which has expanded due to absorption of moisture, may come into contact with other parts, causing problems.

The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a fire-extinguishing laminate that can suppress expansion even in an environment containing water vapor. Another object of the present disclosure is to provide an electronic component comprising a fire-extinguishing laminate.

A fire-extinguishing laminate according to one aspect of the present disclosure includes a pair of substrates, and a fire-extinguishing agent-containing layer containing a binder resin and a fire-extinguishing agent component that generates an aerosol by combustion between the pair of substrates. The water vapor permeability of the material (in accordance with JISK7129, under 40°C/90% RH conditions) is 15 g/m ² /day or less.

In one aspect, the fire-extinguishing laminate may further include a sealing portion on the side surface of the fire-extinguishing agent-containing layer.

In one aspect, at least one of the pair of substrates may include a metal oxide layer.

In one aspect, the fire-extinguishing laminate may further include an adhesive layer as the outermost layer.

An electronic member according to one aspect of the present disclosure includes the fire-extinguishing laminate described above and an electronic component.

According to the present disclosure, it is possible to provide a fire-extinguishing laminate that can suppress expansion even in an environment containing water vapor. The present disclosure can also provide an electronic component comprising a fire-fighting laminate.

Expansion of the extinguishing agent-containing layer is due to moisture absorption. According to the present disclosure, it is possible to suppress the explosion of the fire-extinguishing laminate due to expansion, water leakage (scattering of absorbed moisture) due to the explosion, short-circuiting of electronic components due to water leakage, and the like.

FIG. 1 is a schematic cross-sectional view of a fire-extinguishing laminate according to one embodiment. FIG. 2 is a schematic cross-sectional view of a fire-extinguishing laminate according to another embodiment. FIG. 3 is a schematic cross-sectional view of a fire-extinguishing laminate according to another embodiment.

Hereinafter, embodiments of the present disclosure will be described in detail. However, the present disclosure is not limited to the following embodiments.

<Laminate for fire extinguishing>
The fire-extinguishing laminate includes a pair of base materials, and a fire-extinguishing agent-containing layer containing a binder resin and a fire-extinguishing agent component that generates an aerosol by combustion between the pair of substrates. A pair of substrates having a water vapor transmission rate (JISK7129 compliant, 40° C./90% RH conditions) of 15 g/m ² /day or less can be referred to as a barrier substrate (a substrate having water vapor barrier properties). The fire-extinguishing laminate may be in sheet form.

FIG. 1 is a schematic cross-sectional view of a fire-extinguishing laminate according to one embodiment. The fire-extinguishing laminate 10 includes a substrate 1, a fire-extinguishing agent-containing layer 2, and a substrate 3 in this order. The base materials 1 and 3 can be said to be barrier base materials in the fire-extinguishing laminate 10 . As shown in FIG. 1 , the extinguishing agent-containing layer 2 may be provided on the entire surface between the substrates 1 and 3 . That is, the end faces of the substrate 1, the extinguishing agent-containing layer 2, and the substrate 3 may be flush.

FIG. 2 is a schematic cross-sectional view of a fire-extinguishing laminate according to another embodiment. The fire-extinguishing laminate 20 includes a substrate 4 , a substrate 1 , a fire-extinguishing agent-containing layer 2 , and a substrate 5 in this order, and a sealing portion 6 on the side surface of the fire-extinguishing agent-containing layer 2 . The base material 1 and the base material 5 or the base material 4 and the base material 5 can be called barrier base materials in the fire-extinguishing laminate 10 . Both substrates 1 and 4 may be substrates having water vapor barrier properties.

FIG. 3 is a schematic cross-sectional view of a fire-extinguishing laminate according to another embodiment. The fire-extinguishing laminate 30 includes an adhesive layer 7 , a base material 4 , a base material 1 , a fire-extinguishing agent-containing layer 2 , and a base material 5 in this order, and a sealing portion 6 on the side surface of the fire-extinguishing agent-containing layer 2 . The base material 1 and the base material 5 or the base material 4 and the base material 5 can be called barrier base materials in the fire-extinguishing laminate 10 . Both substrates 1 and 4 may be substrates having water vapor barrier properties.

The thickness of the fire-extinguishing laminate is not necessarily limited because it varies depending on the layer structure, but from the viewpoint of maintaining the fire-extinguishing performance and reducing the thickness so that the installation space is not limited, it is, for example, 0.1 to 20 mm. can be done.

The area of the main surface of the fire-extinguishing laminate (the surface when the fire-extinguishing laminate is viewed from above in the vertical direction) can be, for example, 9 to 620 cm ² from the viewpoint of fire-extinguishing performance and handleability. When the fire-extinguishing laminate includes a sealed portion, for example, in a cross-sectional view of the fire-extinguishing laminate, the length of the base material constituting the outermost layer in the direction perpendicular to the stacking direction is longer than the same length of the fire-extinguishing agent-containing layer. It may be longer than 2 mm.

(Base material)
A resin substrate can be selected as a pair of substrates having water vapor barrier properties. For example, as the material of the resin base material, there is a desired water vapor permeability, and from the viewpoint of easily suppressing the deterioration of the extinguishing agent, polyester and the like can be used. By selecting a transparent material, it becomes easier to inspect the appearance of the fire-extinguishing laminated body and to confirm the timing of replacement.

The water vapor permeability (JISK7129 compliant, 40° C./90% RH conditions) required for a pair of substrates having water vapor barrier properties is 15 g/m ² /, considering the use of a fire extinguishing agent component that generates an aerosol by combustion. day or less, but may be 10 g/m ² /day or less, may be 5 g/m ² /day or less, may be 1.5 g/m ² /day or less, may be 1 g/m ² /day may be: Although the lower limit of water vapor permeability is not particularly limited, it can be, for example, 0.5 g/m ² /day. The water vapor permeability of the base material can be adjusted by changing the thickness, changing the molecular weight, surface treatment, formation of a metal oxide layer described later, and the like. If the water vapor barrier property is insufficient, the fire extinguishing laminate may expand due to deliquescence of the fire extinguishing agent components, and alkaline water may leak. For example, when a fire-extinguishing laminate is installed in an electronic component, the alkaline water may cause a short circuit or corrosion around the installation location.

The thickness, breaking strength, etc. of the pair of base materials having water vapor barrier properties can be appropriately selected according to the amount of heat, impact, allowable space, etc. at the time of fire. For example, if the base material is thick, it is easy to suppress water vapor permeation, obtain strength and rigidity, obtain a form with high flatness, and facilitate handling. Also, if the substrate is thin, the fire-extinguishing laminate can be provided in a narrow space. The thickness of the pair of substrates having water vapor barrier properties may be, for example, 4.5-1000 μm, may be 10-100 μm, may be 10-50 μm, or may be 12-20 μm. The thickness of the pair of substrates having water vapor barrier properties may be the same or different.

At least one of the pair of substrates having water vapor barrier properties may contain a metal oxide layer from the viewpoint of adjusting the water vapor permeability. That is, a substrate having a metal oxide layer on its surface may be used as at least one of the pair of substrates having water vapor barrier properties. The metal oxide layer may be formed on one side of the substrate, or may be formed on both sides. Examples of the metal oxide layer include metal oxide vapor deposition layers (alumina vapor deposition layers and silica vapor deposition layers). From the viewpoint of corrosion resistance to alkaline water generated by deliquescence of fire extinguishing agent components, a silica deposition layer can be preferably used. The thickness of the metal oxide layer can be 3 to 100 nm from the viewpoint of water vapor barrier property and cost.

Examples of substrates that do not necessarily have a water vapor barrier property, such as the substrate 1 in FIG. Among these, resin substrates (for example, polyester film), glass cloth, and noncombustible paper can be used from the viewpoint of insulation and corrosion resistance. The thickness of the substrate that does not need to have water vapor barrier properties can be 20 to 1000 μm, preferably 25 to 300 μm, from the viewpoints of fire resistance, shape retention as a substrate, and space saving. you can

(Layer containing extinguishing agent)
The extinguishing agent-containing layer is a layer containing an extinguishing agent component and a binder resin. The extinguishing agent component generates an aerosol upon combustion. The fire extinguishing agent component includes, for example, at least an inorganic oxidant and a radical generator. The radical generator has an action (negative catalytic action) of stabilizing combustion radicals and suppressing a chain reaction of combustion. The extinguishing agent component has deliquescence.

The thickness of the fire-extinguishing agent-containing layer may be appropriately set according to the location of installation of the fire-extinguishing laminate and the amount of the fire-extinguishing agent component to be blended. The thickness of the extinguishing agent-containing layer may be, for example, 1 mm or less, and may be 30 to 1000 μm, and may be 150 to 500 μm.

The content of the extinguishing agent component in the extinguishing agent-containing layer (based on the mass of the extinguishing agent-containing layer) is, for example, 50 to 97% by mass, preferably 60 to 95% by mass, more preferably 70 to 92% by mass. is. When the content of the extinguishing agent component is 50% by mass or more, excellent fire extinguishing performance can be achieved, and when it is 97% by mass or less, excellent moldability can be achieved. The amount of the extinguishing agent component per unit area may be set according to the target to be extinguished. For example, 25 g/m ² or more is sufficient for low heating power. It should be 90 g/m ² or more for the thermal power of 1 g of solid fuel. It is preferably 100 g/m ² or more for large fires such as large-scale fires and ignition from lithium ion batteries.

[Extinguishing agent component]
As described above, the extinguishing agent-containing layer contains an inorganic oxidizing agent and a radical generator as extinguishing agent components. These components are described below.

The inorganic oxidizing agent (hereinafter sometimes referred to as "(A) component") is a component that burns together with the binder resin to generate thermal energy. Inorganic oxidants include potassium chlorate, sodium chlorate, strontium chlorate, ammonium chlorate, magnesium chlorate, and potassium perchlorate. Among these, one type may be used alone, or two or more types may be used in combination.

The radical generator (hereinafter sometimes referred to as "(B) component") is a component for generating an aerosol (radical) by thermal energy generated by combustion of the binder resin and the inorganic oxidant. As the radical generator, it is preferable to use one having a decomposition initiation temperature in the range of 90 to 260°C. Radical generators include potassium and sodium salts. As potassium salts, potassium acetate, potassium propionate, monopotassium citrate, dipotassium citrate, tripotassium citrate, monopotassium trihydrogen ethylenediaminetetraacetate, dipotassium dihydrogen ethylenediaminetetraacetate, tripotassium monohydrogen ethylenediaminetetraacetate, Tetrapotassium ethylenediaminetetraacetate, potassium hydrogen phthalate, dipotassium phthalate, potassium hydrogen oxalate, dipotassium oxalate and potassium bicarbonate. Sodium salts include sodium acetate, sodium citrate and sodium bicarbonate. Among these, one type may be used alone, or two or more types may be used in combination.

The content of component (A) is, for example, 10 to 60 parts by mass, preferably 20 to 50 parts by mass, more preferably 100 parts by mass of the total amount of components (A) and (B). 35 to 45 parts by mass. The content of component (B) is, for example, 40 to 90 parts by mass, preferably 50 to 80 parts by mass, and more preferably 100 parts by mass as the total amount of components (A) and (B). 55 to 65 parts by mass.

A commercially available product may be used as the fire extinguishing agent component to be blended in the fire extinguishing agent containing layer. Commercially available fire extinguishing agent components include K-1 (trade name, manufactured by Yamato Protech Co., Ltd.) and STAT-X (trade name, manufactured by Nippon Koki Co., Ltd.).

[Binder resin]
Thermoplastic resins and thermosetting resins can be used as binder resins. Polyolefin-based resins such as polypropylene-based resins, polyethylene-based resins, poly(1-)butene-based resins, polypentene-based resins, polystyrene-based resins, acrylonitrile-butadiene-styrene-based resins, methyl methacrylate-butadiene-styrene resins as thermoplastic resins , ethylene-vinyl acetate resin, ethylene-propylene resin, polycarbonate resin, polyphenylene ether resin, acrylic resin, polyamide resin, polyvinyl chloride resin, and the like. 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), polyurethane resin, polyisocyanate resin, polyisocyanurate resin, phenol resin, epoxy resin, and the like. The binder resin may contain a curing agent component.

Epoxy resins are suitable for binder resins because they are highly compatible with fire extinguishing agent components, soluble in alcohol solvents described below, and have high stability. Since epoxy resins are highly compatible with potassium salts and sodium salts (radical generators), it is easy to obtain a fire-extinguishing agent-containing layer having a uniform thickness. In addition, since the epoxy resin does not undergo hydrolysis or embrittlement due to wet heat, the fire-extinguishing agent-containing layer containing the epoxy resin as a binder resin has excellent stability. Further, when the extinguishing agent-containing layer is burned, thermal decomposition begins at about 260 to 350° C., and aerosol can be generated without impairing the extinguishing performance.

As the binder resin, it is preferable to use one having water vapor barrier properties. Examples of commercially available binder resins include Maxieve (trade name, manufactured by Mitsubishi Gas Chemical Company, Inc.), which is an epoxy resin. Epoxy resins can be used, for example, with amine-based hardeners.

The binder resin content based on the total amount of the extinguishing agent-containing layer is, for example, 3 to 50% by mass, preferably 5 to 40% by mass, more preferably 8 to 30% by mass. When the binder resin content is 3% by mass or more, excellent moldability can be achieved, and when it is 50% by mass or less, excellent fire extinguishing performance can be achieved.

[Other ingredients]
Other components to be blended in the extinguishing agent-containing layer include dispersants, solvents, coloring agents, antioxidants, flame retardants, inorganic fillers and adhesives. These components may be appropriately selected according to the composition of the extinguishing agent-containing layer and the type of binder resin. The content of other components in the fire-extinguishing agent-containing layer (based on mass of the fire-extinguishing agent-containing layer) is, for example, 10% by mass or less.

(adhesion layer)
The fire-fighting laminate may further comprise an adhesive layer. For example, between the extinguishing agent-containing layer 2 and the substrate 3 in FIG. 1, between the substrate 1 and the substrate 4 and/or between the extinguishing agent-containing layer 2 and the substrate 5 in FIGS. An adhesive layer may be provided between. The end face of the extinguishing agent-containing layer and the end face of the adhesive layer may be flush with each other, but they are not necessarily flush with each other. When the adhesive is used so as to protrude outward from the end face of the fire-extinguishing agent-containing layer, the protruding adhesive bonds the outermost layer substrates to each other and functions as a sealing portion.

The adhesive layer can be formed using, for example, an adhesive such as epoxy resin, acrylic resin, or urethane resin. Among these, an epoxy resin can be used from the viewpoint of water vapor barrier properties, and for example, Maxieve (trade name, manufactured by Mitsubishi Gas Chemical Company, Inc.) can be used. Epoxy resins can be used, for example, with amine-based hardeners.

The thickness of the adhesive layer may be, for example, 1-10 μm, and may be 2-5 μm.

(sealing part)
The fire-extinguishing laminate may further include a sealing portion on the side surface of the fire-extinguishing agent-containing layer. That is, the fire extinguishing laminate may include a sealing portion that joins the peripheral edges of the base material that is the outermost layer among the base materials. By providing the sealing portion, the side surface of the extinguishing agent-containing layer is sealed. As a result, the extinguishing agent component does not come into contact with the air, and moisture absorption by the extinguishing agent component can be suppressed.

The sealing portion can be formed using the adhesive layer described above or a film (heat sealing material) such as LDPE or LLDPE that exhibits heat sealing properties at a temperature lower than the thermal decomposition temperature of the fire extinguishing agent component. For example, in FIG. 2, when the base material 1 and the base material 4 are adhered using an adhesive, the adhesive formed on the base material 4 exists outside the end surface of the fire extinguishing agent-containing layer 2 . By curing the adhesive in this state, an adhesive layer is formed between the base material 1 and the base material 4 and a sealing portion 6 is formed on the side surface of the extinguishing agent-containing layer 2 . In this case, the sealing portion 6 also serves as an adhesive layer that bonds the base material 4 and the base material 5 together.

Further, in FIG. 2, the heat seal material is formed on the base materials 4 and 5, the heat seal material is opposed to sandwich the extinguishing agent-containing layer 2, and in that state, the heat seal material ends are heated in the stacking direction. By pressing, the extinguishing agent-containing layer 2 is enclosed by the heat sealing material. At that time, the heat-sealed portion formed at the end portion of the heat-sealing material becomes the sealing portion 6 on the side surface of the extinguishing agent-containing layer 2 . The heat sealing material may be formed on the substrates 4 and 5 via the adhesive layer.

(adhesive layer)
The fire-extinguishing laminate may further include an adhesive layer as the outermost layer. This allows the fire-extinguishing laminate to be installed anywhere near a location where there is a risk of fire. A release layer may be formed on the adhesive layer to improve handling. Examples of the release layer include silicone-coated PET and PP-coated paper.

The adhesive layer can be formed using, for example, an adhesive such as urethane urea resin or acrylic resin. Among these, urethane urea resin can be used from the viewpoint of easy peelability. A urethane urea resin can be used, for example, together with a urethane-based curing agent.

<Method for manufacturing fire-extinguishing laminate>
As described above, the method for producing the fire-extinguishing laminated body is not particularly limited, and it can be produced by appropriately laminating the respective layers described above and, if necessary, heat-sealing them.

The method for forming the extinguishing agent-containing layer 2 on the base material 1 includes a step of preparing a coating solution containing the extinguishing agent component and the binder resin (coating solution preparation step), A step of forming a coating film using the coating solution (coating step), and a step of forming a fire extinguishing agent-containing layer 2 on the surface of the base material 1 by drying the coating film (drying step). Prepare.

In the coating liquid preparation step, an alcohol solvent (eg, ethanol, IPA) can be used as a solvent for preparing the coating liquid. An alcohol solvent is suitable as a solvent for preparing a coating liquid because it has excellent dispersibility of fire extinguishing agent components and low volatility. Ethyl acetate may be used as solvent. The amount ratio of the solvent to the amounts of the extinguishing agent component and the binder resin may be appropriately adjusted according to the desired viscosity of the coating liquid.

The coating step may be performed by wet coating, or by impregnating the substrate with the coating liquid.

The drying step can be carried out, for example, by heating the coating film to 50 to 100° C. from the viewpoint of sufficiently removing the solvent and suppressing the reaction of the fire extinguishing agent component.

<Electronics parts>
The electronic member includes the fire-extinguishing laminate and an electronic component. The fire-extinguishing laminated body described above suppresses expansion due to moisture absorption even in a high-humidity environment. Therefore, even when incorporated into an electronic member, problems caused by the fire-extinguishing laminate can be avoided.

Specific examples of electronic parts include batteries, cables, power conditioners, and the like. Moreover, as an electronic member, a switchboard, a photovoltaic power generation device, etc. are specifically mentioned.

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

<Preparation of fire-extinguishing laminate>
(Example 1)
Ethanol was added to aerosol fire extinguishing agent K-1 manufactured by Yamato Protech Co., Ltd. to prepare a slurry. The obtained slurry and binder resin (manufactured by Mitsubishi Gas Chemical Co., Ltd., polyepoxy resin Maxieve M-100, polyamine resin curing agent C-93) are mixed at a mass ratio of binder: fire extinguishing agent = 10:90 after drying. A coating liquid was prepared by doing so, and this was coated on a PET film manufactured by Toray Industries, Inc. (substrate A: S10, thickness 50 μm) so as to have a dry weight of 235 g/m ² to form a coating film. This was dried at 90° C. for 4 minutes to form a fire-extinguishing agent-containing layer having a thickness of 200 μm on the PET film.
An adhesive (manufactured by Mitsubishi Gas Chemical Company, Inc., poly Epoxy resin Maxieve M-100, polyamine resin curing agent C-93) was applied and dried (90° C., 1 minute) to form an adhesive layer having a thickness of 5 μm.
A fire-extinguishing laminate was obtained by laminating the fire-extinguishing agent-containing layer on the substrate A and the adhesive layer on the substrate B so as to face each other.

(Example 2)
In the same manner as in Example 1, a fire-extinguishing agent-containing layer having a thickness of 200 μm was formed on a PET film as the substrate A.
Square substrates C and D longer than substrate A by 20 mm in both length and width were prepared. Substrates C and D are PET films (thickness: 12 μm) having on one side a vapor deposition layer containing silica as a main component (silica vapor deposition layer, thickness: 50 nm). Among these, on the silica deposition layer side of the substrate C, in the same manner as in Example 1, an adhesive layer having a thickness of 5 μm was formed.
The base material A and the adhesive layer on the base material C are opposed to each other, and the extinguishing agent-containing layer on the base material A and the silica vapor deposition layer on the base material D are opposed to each other, and laminated and laminated to form a fire extinguishing device. A laminate was obtained. At this time, the position was adjusted so that the substrate A was placed in the center of the substrates C and D. In this example, an adhesive layer is formed between the base material A and the base material C, and a sealed portion is formed on the side surface of the base material A and the fire extinguishing agent-containing layer by the cured adhesive component constituting the adhesive layer. was done.

(Example 3)
The same as in Example 2 except that the substrates C' and D' were used in which the silica vapor deposition layer of the substrates C and D was replaced with a vapor deposition layer containing alumina as a main component (alumina vapor deposition layer, thickness 50 nm). to obtain a fire-extinguishing laminate.

(Example 4)
The extinguishing agent-containing layer on the base material A and the adhesive layer on the base material C are opposed to each other, and the base material A and the silica deposition layer of the base material D are opposed to each other, and laminated and laminated to form a fire extinguishing extinguishing agent. A laminate was obtained. In this example, an adhesive layer is formed between the extinguishing agent-containing layer on the substrate A and the substrate C, and a cured adhesive component constituting the adhesive layer is formed on the side surface of the substrate A and the extinguishing agent-containing layer. A sealing portion was formed.

(Example 5)
In the same manner as in Example 1, a fire-extinguishing agent-containing layer having a thickness of 200 μm was formed on a PET film as the substrate A.
An adhesive layer having a thickness of 5 μm was formed in the same manner as in Example 1 on the substrates C and D on which the silica vapor deposition layer was formed.
The base material A and the adhesive layer on the base material C are opposed to each other, and the extinguishing agent-containing layer on the base material A and the adhesive layer on the base material D are opposed to each other, and laminated and laminated to form a fire-extinguishing extinguisher. A laminate was obtained. In this example, an adhesive layer is formed between the substrate A and the substrate C and between the extinguishing agent-containing layer on the substrate A and the substrate D, and the adhesive layer is formed on the side surface of the substrate A and the extinguishing agent-containing layer A sealing portion was formed by a cured product of the adhesive component constituting

(Example 6)
In the same manner as in Example 1, a fire-extinguishing agent-containing layer having a thickness of 200 μm was formed on a PET film as the substrate A.
An adhesive layer having a thickness of 5 μm was formed in the same manner as in Example 1 on the substrates C and D on which the silica vapor deposition layer was formed. Further, each adhesive layer was bonded to the corona-treated surface side of an LLDPE film (heat sealing material, MC-S, thickness 30 μm) manufactured by Mitsui Chemicals Tohcello, Inc.
The substrate A and the LLDPE film on the substrate C are opposed to each other, and the extinguishing agent-containing layer on the substrate A and the LLDPE film on the substrate D are opposed to each other, laminated, and heated to 120 ° C. A heat roll A fire-extinguishing laminate was obtained by heat-sealing at . In this example, the substrate A and the fire-extinguishing agent-containing layer were entirely sealed with the heat sealing material. The sides of the base material A and the fire-extinguishing agent-containing layer were formed with sealed portions by heat sealing between the heat sealing materials.

(Example 7)
In the same manner as in Example 6, the substrate A and the LLDPE film on the substrate C were opposed, and the extinguishing agent-containing layer on the substrate A and the LLDPE film on the substrate D were opposed and laminated. .
An adhesive (urethane urea-based main agent SP-205, urethane-based curing agent T-501B manufactured by Toyochem Co., Ltd.) was applied to the substrate C side and dried to form an adhesive layer having a thickness of 15 μm. Furthermore, the silicone-coated surface of silicone-coated PET (release layer, therapyl, thickness 75 μm) manufactured by Toray Advanced Film Co., Ltd. was laminated on the adhesive layer.
The resulting laminate was heat-sealed in the same manner as in Example 6 to obtain a fire-extinguishing laminate with an adhesive layer.

(Comparative example 1)
A fire-extinguishing laminate with an adhesive layer was obtained in the same manner as in Example 7, except that the substrates C and D did not have a silica deposition layer.

<Various evaluations>
(water vapor permeability)
The water vapor transmission rate of the substrate used in each example was measured under conditions of 40° C./90% RH in accordance with JISK7129. Table 1 shows the results.

(fire extinguishing)
The extinguishing properties (initial extinguishing properties) of the layer containing the extinguishing agent were evaluated. A rectangular parallelepiped SUS container having internal dimensions of 139 mm in height, 109 mm in width and 36 mm in depth, and having three circular holes each having a diameter of 18 mm on each of two sides of height and depth was prepared. 1.5 g of compressed wood containing paraffin (solid fuel fire block ignition agent manufactured by Captain Stag Co., Ltd.) is placed in the center of the bottom, and the lower end of the fire-fighting laminate is positioned 40 mm from the bottom on the inner surface of the container consisting of height and width. The fire-extinguishing laminate was attached so as to be At that time, with respect to the base material A of the fire-extinguishing laminate, the side of the fire-extinguishing agent-containing layer (the layer side described on the right side in the base material configuration in Table 2) faces the paraffin-containing compressed wood piece, A fire-extinguishing laminate was applied. For laminates without an adhesive layer, an adhesive layer was formed and attached. It was confirmed whether the fire extinguishing laminate could extinguish the fire within 10 seconds after the reaction when the paraffin-containing compressed wood piece was ignited.

(expansion)
A high-temperature and high-humidity environment test was performed on the fire-extinguishing laminate obtained in each example. Specifically, the fire-extinguishing laminate was allowed to stand in an environment of 80° C. and 85% RH for 168 hours. After that, the central thickness (maximum thickness in the lamination direction) of the fire-extinguishing laminate was measured with a vernier caliper and compared with the thickness before the test. Table 2 shows the results.
OK: The amount of increase in thickness is less than 500 μm.
NG: The amount of increase in thickness is 500 μm or more.

As described above, the fire-extinguishing laminate of the example comprising a pair of barrier base materials was able to suppress expansion in the lamination direction to less than 500 μm even after standing in a high-temperature, high-humidity environment.

In addition, the laminates of Examples 2 to 7 and Comparative Example 1, in which the sealing portion was formed on the side surface of the fire extinguishing agent-containing layer, were left standing for 168 hours in an environment of 80 ° C. and 85% RH. No water droplets could be visually confirmed.

The laminates of Examples 2 and 4 to 7, which used a silica deposition layer as the metal oxide layer, changed in appearance (extinguishing agent-containing layer swelling, etc.) was not observed.

The laminates of Example 7 and Comparative Example 1 provided with an adhesive layer could be adhered to a SUS-made object with good workability.

DESCRIPTION OF SYMBOLS 1,3,4,5... Base material, 2... Fire-extinguishing agent-containing layer, 6... Sealing part, 7... Adhesive layer, 10, 20, 30... Fire-extinguishing laminated body.

Claims (5)

A pair of base materials, and a fire extinguishing agent-containing layer containing a binder resin and a fire extinguishing agent component that generates an aerosol by combustion between the pair of base materials,
A fire-extinguishing laminate, wherein the base material has a water vapor transmission rate (JISK7129 compliant, 40° C./90% RH conditions) of 15 g/m ² /day or less. The fire-extinguishing laminate according to claim 1, further comprising a sealing portion on a side surface of the fire-extinguishing agent-containing layer. The firefighting laminate according to claim 1 or 2, wherein at least one of the pair of substrates comprises a metal oxide layer. The firefighting laminate according to any one of claims 1 to 3, further comprising an adhesive layer as the outermost layer. An electronic member comprising the fire-extinguishing laminate according to any one of claims 1 to 4 and an electronic component.

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