JP2020081809A - Microcapsule, and fire extinguishing sheet and fire extinguishing cord using the same, and its auxiliary tool - Google Patents

Abstract

To provide microcapsules which are filled therein with an organic compound harmless to the human body and environment as extinguishing agent, and to provide a fire extinguishing sheet and a fire extinguishing cord in which the microcapsules are likely to burst in case of ignition and extinguish a fire effectively in the initial stage of fire, and its auxiliary tool.SOLUTION: The microcapsule is filled therein with dodecafluoro-2-methylpentane-3-one (FK-5-1-12) as a fire extinguishing agent and a soluble ammonium phosphate salt. A fire extinguishing sheet and a fire extinguishing cord are formed by mixing the microcapsules with an ink composed of a water-soluble resin and a curing agent, kneading them into fibers, and solidifying them into a plate shape or a rod shape. The fire extinguishing sheet may have an adhesive layer for adhering to an adherend on one surface thereof, and the adhesive layer may be provided with a release sheet which is releasably bonded to an adhesive surface to an adherend.SELECTED DRAWING: Figure 1

Description

The present invention relates to a microcapsule containing an extinguishing agent that can be used for extinguishing a fire in an early stage of a fire, an extinguishing sheet using the same, an extinguishing cord, and an auxiliary tool thereof. In particular, the present invention relates to a fire extinguishing sheet and a fire extinguishing cord that use a fire extinguishing agent that has high fire extinguishing efficiency, is harmless to the human body, and does not damage equipment.

In recent years, electric fires in homes and factories are on the increase. In the vicinity of the plug-in connector (so-called outlet) for wiring of electric appliances, when dust accumulates on the plug and moisture is added, the insulating part between the two blades of the plug has heat and the electricity gradually flows. There is an increasing number of so-called tracking fires, in which a short circuit causes a fire when electricity changes to. Tracking fires increase especially in the vicinity of plug-in connectors for wiring used in places where dust is likely to accumulate on the back such as refrigerators and washing machines, and in plug-in connectors for wiring used in humid places such as kitchens and washrooms. ing. In addition, in order to compensate for the shortage of the number of plug receivers, by using many electric appliances with so-called octopus wiring, the allowable amount of electricity of the plug-in connector for wiring is exceeded, and The number of cases where a connector is heated and causes a fire is increasing (octopus wiring fire).

In addition, fires that cannot be prevented by an earth leakage breaker, such as an old switchboard due to overload or lightning strikes at home or a factory, a cord film fire from a distribution board, a fire from an old capacitor, a short-circuit of electric wiring, etc. is increasing. In order to prevent the above fires in homes and factories, it is possible to install sensors in the plug-in connectors for wiring, switchboards, etc. to prepare fire extinguishing equipment to extinguish the fire at the initial stage of the fire. It is often expensive and requires additional installation space. On the other hand, if measures are not taken to prevent fires, it will cost enormously to repair the facilities of factories and buildings, in addition to the suspension of operations due to fires at factories and companies. For this reason, fire extinguishing agents and sheets have been developed to extinguish the fire in the early stages of the fire.

For example, Patent Document 1 discloses a self-extinguishing sheet constituted by applying an inorganic coating material in which fire-extinguishing microcapsules containing a fire-extinguishing agent are uniformly dispersed on a base material and drying the coating material. .. A nonflammable material such as a metal alkoxide is used for this inorganic paint. It is said that this self-extinguishing sheet is hard to ignite, and even if it ignites, it can be easily extinguished by its self-extinguishing action.

Patent Document 2 discloses an automatic fire extinguishing agent formed from microcapsules having fire extinguishing properties and a binder. The microcapsules are disclosed in which the halocarbons are encapsulated in a polymeric shell of polyurea and/or polyurethane and the binder is a composite material containing polymeric components and mineral fibers and/or particles. This self-extinguishing agent is made from a composite material that has fire extinguishing properties based on a fire extinguishing composition, so that it releases the fire extinguishing agent strongly, and is flexible, sturdy, durable, and It is said to be an easy-to-use fire extinguisher.

JP-A-5-84873 Special table 2014-509230 gazette

Since the self-extinguishing sheet of Patent Document 1 uses a non-combustible inorganic coating material as the coating material, it is difficult for the coating film itself to ignite, so that the microcapsules in the coating film are less likely to rupture, and the self-extinguishing agent There is a problem that the release is delayed. Therefore, a rupture of the microcapsule is likely to occur at the time of ignition, and a fire-extinguishing sheet that effectively releases a fire-extinguishing agent in the initial stage of a fire is desired.

Since the automatic extinguishing agent of Patent Document 2 contains halocarbons in the microcapsules, when the extinguishing agent is heated and the microcapsule shell is broken, a large amount of halocarbon vapor is released to extinguish the fire. However, since halocarbons act as greenhouse gases and ozone depleting substances, they contribute to the environmental load. Further, when the ozone layer is destroyed, the amount of ultraviolet rays reaching the earth increases, which is harmful to the human body. In particular, the manufacture of fire extinguishing agents using halon, which is a kind of halocarbon, was abolished in developed countries in 1993 and worldwide at the end of 2009. Therefore, a fire extinguisher using a material harmless to the environment and the human body is desired.

The present invention, in view of the above problems, a human body as a fire extinguishing agent, a microcapsule encapsulating an organic compound harmless to the environment, and a rupture of the microcapsule easily occurs at the time of ignition, and an extinguishing sheet that effectively extinguishes fire in the initial stage of a fire. The purpose is to provide a fire extinguishing cord and its auxiliary equipment.

In order to solve the above problems, the invention according to claim 1 is a microcapsule in which a fire extinguishing agent is enclosed, wherein the fire extinguishing agent is dodecafluoro-2-methylpentan-3-one (FK-5-1). -12) and ammonium dihydrogen phosphate.
The invention according to claim 2 is formed by mixing the microcapsules according to claim 1 with an ink composed of a water-soluble resin and a curing agent, kneading into fibers, and solidifying into a plate shape. It is a fire-extinguishing sheet.
A third aspect of the present invention is the fire-extinguishing sheet according to the second aspect, wherein the one-side surface of the fire-extinguishing sheet has an adhesive layer for sticking to an adherend, and the adhesive layer is And a release sheet that is releasably attached to the adhesive surface to the adherend.
The invention according to claim 4 is formed by mixing the microcapsules according to claim 1 with an ink composed of a water-soluble resin and a curing agent, kneading the mixture into fibers, and solidifying it into a string shape. This is the fire extinguishability code.
The invention according to claim 5 is an auxiliary tool for sticking the fire-extinguishing sheet according to claim 2 or 3 to a plug-in connector for wiring, which is fixed when the plug is inserted into a plug receiver. The auxiliary tool is characterized by having a fixing surface parallel to the plug receiver and an upper surface perpendicular to the fixing surface and covering the insertion plug.

The microcapsule of the present invention is a fire extinguishing agent in which a human body and an organic compound harmless to the environment are encapsulated, and the fire extinguishing sheet and the fire extinguishing cord of the present invention are apt to burst of the microcapsule at the time of ignition, and the initial stage of fire. The fire can be effectively extinguished in. Further, the auxiliary tool for a fire-extinguishing sheet of the present invention can effectively apply the fire-extinguishing sheet to a fire, and supports more efficient fire extinguishing.

(A) of a fire-extinguishing sheet with a seal which is one embodiment of the present invention is a sectional view, and (B) is an enlarged schematic diagram of the fire-extinguishing sheet part of (A). It is explanatory drawing which used the fire extinguishing sheet shown in FIG. 1 for the plug-in connector for wiring. It is explanatory drawing which used the fire extinguishing sheet shown in FIG. 1 with an auxiliary tool, (A) is a perspective view of an auxiliary tool, (B) is an explanation using an auxiliary tool for a plug-in connector for wiring. It is a figure. It is explanatory drawing which used the fire extinguishing sheet shown in FIG. 1 for the distribution board (breaker). It is explanatory drawing which used the fire extinguishing sheet shown in FIG. 1 for the switchboard. (A) of the fire-extinguishing cord which is one embodiment of the present invention is a perspective view, and (B) is a schematic diagram of the AA line sectional view of (A). It is explanatory drawing which used the fire extinguishing code shown in FIG. 6 for the switchboard.

Hereinafter, embodiments of the present invention (hereinafter referred to as examples) will be described with reference to the drawings. Note that, in the following drawings, common portions are given the same reference numerals, and duplicate description of the portions having the same reference numerals is omitted.

[Composition of microcapsule and fire extinguishing sheet 1]
First, the configurations of the microcapsules and the fire extinguishing sheet 1 according to one embodiment of the present invention will be described with reference to FIGS. 1(A) and 1(B). 1A is a cross-sectional view of a fire-extinguishing sheet 1 with a seal, and FIG. 1B is an enlarged schematic view of a fire-extinguishing sheet portion 10. In FIG. 1(B), the microcapsules 11 in the fire extinguishing sheet portion 10 are schematically shown in an exaggerated granular form so that the structure of the present embodiment can be easily understood.

As shown in FIG. 1(A), the fire extinguishing sheet 1 of this embodiment is composed of a fire extinguishing sheet portion 10 and an adhesive layer 20 (seal) for sticking to one side of an adherend to an adherend. It The adhesive layer 20 is not an essential component in the present invention, and can be composed of only the fire extinguishing sheet portion 10. In that case, a double-sided tape or the like may be attached if necessary. The adhesive layer 20 includes an adhesive portion 21 that adheres to the fire-extinguishing sheet portion 10 and has an adhesive surface for an adherend, and a release sheet 22 that is releasably attached to the adhesive surface. The release sheet 22 is removed from the adhesive portion 21 when the fire extinguishing sheet 1 is used like a normal seal. The adhesive layer 20 may be any adhesive as long as it can adhere to the fire-extinguishing sheet portion 10 and the adherend, and a commercially available double-sided seal may be used.

As shown in FIG. 1B, in the fire-extinguishing sheet portion 10, a large amount of microcapsules 11 in which a fire-extinguishing agent is enclosed are mixed with the ink 12 (containing a water-soluble resin and a curing agent) at high density and uniformly. Then, after stirring, it is kneaded into heat-resistant fiber, dried and solidified into a plate shape, and manufactured. As a fire extinguisher enclosed in the microcapsules 11, an organic compound, dodecafluoro-2-methylpentan-3-one (FK-5-1-12) (chemical formula C ₆ F ₁₂ O) having excellent fire extinguishing performance, A liquid in which a trade name NOVEC 1230 (NOVEC is a registered trademark of 3M Company) and ammonium dihydrogen phosphate (chemical formula (NH ₄ ) ₃ PO ₄ ) which is one of soluble ammonium phosphate salts is used is used. Dodecafluoro-2-methylpentan-3-one (hereinafter referred to as NOVEC1230) is a fluoroketone-based fire extinguisher and does not destroy ozone because it does not have a bromine atom and a chlorine atom. Excellent in terms of environment and safety. In addition, long-term sustainable use is possible. Further, it has excellent electrical insulation properties, and has the advantage of not impairing its function even when an electric device such as a computer or a communication device is immersed, and the advantage that it is hardly contaminated by a fire extinguishing agent.

NOVEC 1230 has the effect of suppressing the combustion chain reaction, and can lower the air temperature by reducing the momentum of the fire, but in order to make sure the fire is extinguished, ammonium dihydrogen phosphate is mixed at a ratio of 50% in this embodiment. ing. The proportion of ammonium dihydrogen phosphate mixed is not limited to 50%, and can be appropriately changed in the proportion of 30 to 70%. A large amount of microcapsules 11 in which the mixed extinguishant is mixed is burst by the heat of the fire and injected, which lowers the combustion temperature of the material and increases the production of combustion residues (ash) and char. A fire extinguishing can be done surely by forming a film on it and blocking it from oxygen. As a fire extinguishing agent for surely extinguishing fire, instead of ammonium dihydrogen phosphate, a mixed solution of potassium hydrogen carbonate, sodium and silicic acid anhydride, or another soluble ammonium phosphate salt can be used.

The microcapsules 11 are manufactured by a well-known interfacial polymerization method. Especially in consideration of safety, it is produced by an interfacial polycondensation method without using a diamine having toxicity. The outer wall (membrane) substance of the microcapsule 11 configured by this method is, for example, a polymer material such as polyurea or polyurethane, cellulose, gelatin, polyvinyl. Therefore, the microcapsule 11 has a high strength and a thin film, and can be filled with a liquid fire extinguishing agent in which NOVEC 1230 and ammonium dihydrogen phosphate are mixed. The microcapsule 11 has high durability, can be used in a temperature range of −40° C. to 85° C., and is reliably sealed for a long period of time. The effect duration is about 10 years.

When the microcapsules 11 are heated to 105±5° C. by the heat of fire, they melt and the extinguishing agent therein is released. At the same time, when the mixed liquid fire extinguisher is heated to 100° C. or higher, it vaporizes and expands, and the inner pressure thereof causes the outer wall of the microcapsule 11 to rupture, and the gasified fire extinguisher is released to the outside. If the particle size of the microcapsule 11 is too small, the fire extinguishing agent to be enclosed is small and a sufficient fire extinguishing effect cannot be obtained. Therefore, a particle size of about 200 to 1000 μm is used in this embodiment.

The above-mentioned microcapsule 11 is mixed with the ink 12 (containing a water-soluble resin and a curing agent), stirred, and then kneaded into heat-resistant fiber and dried and solidified into a plate shape to manufacture the fire-extinguishing sheet portion 10. In this embodiment, the ink 12 and the microcapsule 11 are mixed at a ratio of 10:1. For example, 100 g of microcapsules 11 are mixed with 1 kg of ink 12. Thereby, the fire-extinguishing sheet portion 10 in which a large number of microcapsules 11 are densely and uniformly mixed can be manufactured. The ratio of mixing the ink 12 and the microcapsule 11 is not limited to the above ratio, and can be appropriately changed and manufactured depending on the place where the fire-extinguishing sheet 1 is used.

Any ink may be used as the ink 12 as long as it is a water-soluble ink containing a water-soluble resin and a curing agent, but it is excellent in leveling property, print reproducibility, post-peeling property, film strength and solvent resistance. It is preferable to use an ink. The ink 12 is dried and solidified by evaporation of the volatile solvent in the ink 12, but in this embodiment, the ink 12 mixed with the microcapsules 11 is kneaded into heat resistant fibers to form a plate and then dried. Solidify. The thickness of the plate to be formed is, for example, 3 mm, but it may be formed to 2 to 5 mm depending on the place to be used.

Since the heat-resistant temperature of the ink 12 is 100 to 150° C., it gels when heated by a fire, melts in the range of 110±5° C. lower than the melting temperature, and the components other than the curing agent of the ink 12 are vaporized. On the other hand, the curing agent for the ink 12 has a heat-resistant temperature of about 200° C. and remains entangled with the fibers. At this time, as described above, the fire extinguishing agent in the microcapsules 11 mixed with the ink 12 vaporizes and expands, so that the microcapsules 11 burst and the gasified fire extinguishing agent is released. As described above, since the fire extinguishing sheet portion 10 is configured, the microcapsules 11 are likely to burst at the time of ignition, and the fire can be extinguished quickly.

As described above, the fire-extinguishing sheet 1 is manufactured by manufacturing the fire-extinguishing sheet portion 10 into a plate shape and then adhering the adhesive layer 20 thereto. The fire-extinguishing sheet portion 10 and the adhesive layer 20 can be adhered by an existing method, for example, a double-sided tape. The manufactured fire-extinguishing sheet 1 can be used at any place where a fire may occur by cutting it into a desired size. Since the fire-extinguishing sheet 1 of the present embodiment is configured as described above, for example, in a volume of 9 cm ³ of the fire-extinguishing sheet 1, about 12000 ml of the fire extinguishing agent (for 6 2L PET bottles) can be contained, It can be effectively extinguished in the early stages of a fire.

[Example of use of fire extinguishing sheet 1]
Next, a usage mode of the fire extinguishing sheet 1 will be described with reference to FIGS. Since the fire-extinguishing sheet 1 of this embodiment is thin (3 mm) and has flexibility, the fire-extinguishing sheet 1 has a desired size even in a narrow gap such as a plug-in connector 50 (outlet) for wiring, a distribution board, and a switchboard. Can be cut and used. FIG. 2 is an explanatory diagram in which the fire extinguishing sheet 1 is used for a plug-in connector for wiring. When used in the plug-in connector 50 for wiring as shown in FIG. 2, the basic size 190 mm×100 mm (25 g) can be cut into, for example, 85 mm×45 mm so as to match the dimensions. .. The fire-extinguishing sheet 1 is preferably installed above the plug-in connector 50 for wiring in order to enhance the fire-extinguishing effect. By installing the fire-extinguishing sheet 1 on the upper part, in the event of a fire, the fire extinguishing agent enclosed in the microcapsules 11 is jetted by the heat of the fire, and the fire of the plug-in connector 50 for wiring can be extinguished in the initial stage.

In the case of a fire of the plug-in connector 50 for wiring, you may use the auxiliary tool 51 as shown in FIG. 3 so that the fire-extinguishing sheet 1 may be more effectively heated by the fire. FIG. 3A is a perspective view of the auxiliary tool 51, and FIG. 3B is an explanatory diagram of the auxiliary tool 51 used for the plug-in connector 50 for wiring. The auxiliary tool 51 is configured to be fixed when the plug of the plug-in connector for wiring 50 is inserted into the plug receiver, and has a fixing surface parallel to the plug receiver and a plug plug perpendicular to the fixing surface. It is a configuration having an upper surface (roof) that covers. As shown in FIG. 3(B), by installing the fire-extinguishing sheet 1 inside the upper surface of the auxiliary tool 51, the fire-extinguishing sheet 1 can be effectively applied to the fire in the case of a fire, and more efficiently. You can extinguish the fire.

FIG. 4 is an explanatory diagram in which the fire extinguishing sheet 1 is used in a distribution board (breaker), and FIG. 5 is an explanatory diagram in which the fire extinguishing sheet 1 is used in a switchboard of a factory or the like. As described above, in homes and factories, fires such as code board fires from old switchboards and distribution boards due to overloads and lightning strikes, fires from old capacitors, short-circuits in electrical wiring, etc. are increasing. When the fire-extinguishing sheet 1 is installed on the distribution board 60 as shown in FIG. 4, it is preferable to install the fire-extinguishing sheet 1 on a plurality of places according to the size on all the places where a fire may occur. In the example shown in FIG. 4, the fire-extinguishing sheet 1 having a larger size than the case of being installed in the plug-in connector 50 for wiring in FIGS. 2 and 3 is used.

Similarly, when it is used in the switchboard 70 of a factory or the like in FIG. 5, it is also preferable to install it in a plurality of places so as not to hinder the wiring. By installing the fire-extinguishing sheet 1 in this way, in the event of a fire, the fire extinguishing agent enclosed in the microcapsules 11 of the fire-extinguishing sheet 1 is injected, and even in the case of the fire of the switchboard 60 and the distribution board 70, the initial stage You can extinguish with. As described above, the fire extinguishing agent of the present embodiment has the advantages that it does not impair its function even when an electric device such as a communication device is immersed, and has almost no stain. Further, the fire-extinguishing sheet 1 of the present embodiment can prevent extra spending and loss related to the fire, such as business stoppages in factories and companies, repair of equipment and facilities, etc., by extinguishing the fire at the initial stage. ..

[Composition of fire extinguishing code 2]
The configuration of the fire extinguishing cord 2 according to the embodiment of the present invention will be described with reference to FIGS. 6(A) and 6(B). FIG. 6(A) is a perspective view of the fire extinguishing cord 2 of the present invention, and FIG. 6(B) is a schematic view of a cross-sectional view taken along the line AA of (A). In FIG. 6(B), the microcapsules 41 in the fire extinguishing cord portion 30 are schematically shown in an exaggerated granular form so that the configuration of the present embodiment can be easily understood.

The fire extinguishing cord 2 of this embodiment includes a fire extinguishing cord portion 30 and caps 31 at both ends thereof. As the cap 31, a vinyl cap made of polyethylene or the like is used. Both ends of the fire extinguishing cord portion 30 can be fixed and protected by the cap 31. The cap 31 is not an essential component of the present invention and may be composed of only the fire extinguishing cord portion 30.

As shown in FIG. 6B, in the fire-extinguishing cord portion 30, a large amount of microcapsules 41 in which the fire-extinguishing agent is enclosed are mixed with the ink 40 (including the water-soluble resin and the curing agent) at high density and uniformly. Then, after stirring, it is kneaded into a heat-resistant fiber and dried and solidified into a string shape to be manufactured. The structure of the microcapsule 41 is the same as that of the fire-extinguishing sheet 1 described above, and as the fire-extinguishing agent, a liquid in which NOVEC 1230 and ammonium dihydrogen phosphate are mixed by 50% is used. The proportion of ammonium dihydrogen phosphate mixed is not limited to 50%, and can be appropriately changed in the proportion of 30 to 70%.

The method of manufacturing the microcapsules 41 is the same as the method of manufacturing the microcapsules 11 in the fire extinguishing sheet 1, and thus the description thereof is omitted. Further, the ink 40 used is the same as the ink 12 in the fire extinguishing sheet 1, and therefore its explanation is omitted.

The ink 40 is dried and solidified by evaporation of the volatile solvent in the ink 40, but in this embodiment, the ink 40 mixed with the microcapsules 41 is kneaded into heat resistant fibers to form a string and then dried. Solidify. The diameter of the cord (cord) to be formed is, for example, 3 mm, but it may be 1 to 10 mm depending on the place to be used. The length of the cord (cord) can be cut to a desired dimension from about 5 cm to about 200 cm.

The fire extinguishing cord portion 30 is preferably covered with nylon fiber or the like to be coated. Thereby, the shape of the fire extinguishing cord portion 30 can be maintained and durability can be improved. The heat-resistant temperature of nylon fiber is 80 to 140°C, and the heat-resistant temperature of ink 40 is 100 to 150°C, but it gels when heated by fire, and melts in the range of 110 ± 5°C, which is lower than the melting temperature, The components of the ink 40 other than the curing agent are vaporized. On the other hand, the curing agent of the ink remains entwined with the fibers of the coating and the internal fibers, and the fire extinguishing agent in the microcapsules 41 in the ink 40 vaporizes and expands, bursting the microcapsules 41 and extinguishing the gasified fire. The agent is released. Since the fire extinguishing cord 2 of the present embodiment is configured as described above, it can be effectively extinguished in the early stage of a fire.

[Example of fire extinguishability code 2]
Next, a usage mode of the fire extinguishing code 2 will be described with reference to FIG. 7. The fire extinguishing cord 2 of this embodiment can be used in any place where a fire may occur. In particular, the fire extinguishing sheet 1 can be installed in a difficult place. Further, since the fire-extinguishing cord 2 has a diameter of 3 mm and is flexible and can be cut into a desired length for use, it can be used in a wider range than the fire-extinguishing sheet 1.

FIG. 7 is an explanatory diagram in which the fire extinguishing cord 2 is used in the large-sized switchboard 80. Since the fire-extinguishing cord 2 does not have an adhesive layer (seal) 20 like the fire-extinguishing sheet 1, when the fire-extinguishing cord 2 is installed, the fire-extinguishing cord 2 is installed by attaching an attachment for hanging the cord on a pillar. In FIG. 7, a hook attached to a pillar of the large switchboard 80 is used as the attachment tool. By hanging the fire extinguishing cord 2 on this hook, it can be easily installed on the large-sized switchboard 80. The attachment is not limited to the hook, and any attachment may be used, and a strong adhesive tape or the like may be used.

Further, like the fire extinguishing sheet 1, the fire extinguishing cord 2 is preferably installed above the large-sized switchboard 80 in order to enhance the fire extinguishing effect. In particular, when it is desired to enhance the fire extinguishing effect, the fire extinguishing cord 2 may be installed in double or in plural places. By installing the fire extinguishing cord 2 on the upper portion of the large switchboard 80, the fire extinguishing agent enclosed in the microcapsules 41 is sprayed by the heat of the fire during a fire, and the fire of the large switchboard 80 can be extinguished in the initial stage.

As described above, the microcapsule of the present invention contains an organic compound that is harmless to the human body and the environment as a fire extinguishing agent and can be used for a long period of time. Further, the fire-extinguishing sheet and the fire-extinguishing cord containing the microcapsules are likely to cause the microcapsules to burst at the time of ignition, and can be effectively extinguished in the initial stage of the fire. Further, by doing so, it is possible to prevent extra spending and loss related to a fire, such as business stoppages in factories and companies, repair of equipment and facilities, and the like.

Furthermore, since the fire-extinguishing sheet and the fire-extinguishing cord of the present invention are flexible and can be cut to a desired size before use, they can be easily installed at a necessary place and in a required amount. Further, by using the auxiliary tool of the present invention, the fire extinguishing sheet can be effectively applied to the fire, and the fire can be extinguished more efficiently.

In the examples, the fire extinguishing sheet and the fire extinguishing cord have been described as examples using the plug-in connector for wiring, the distribution board, and the distribution board, but the present invention is not limited to these, and any device that may cause a fire or It can be used where necessary. Furthermore, the microcapsule of the present invention can be applied not only to the above-mentioned sheets and cords but also to wallpaper, spray, and the like. Further, the configuration of the present invention can be modified as appropriate without departing from the spirit of the invention.

1 Fire-extinguishing sheet 2 Fire-extinguishing cord 10 Fire-extinguishing sheet part 11,41 Microcapsule 12,40 Ink 20 Adhesive layer 21 Adhesive part 22 Release sheet 30 Fire-extinguishing code part 31 Cap 50 Wiring plug connector 51 Auxiliary equipment 60 Switchboard 70 Distribution board 80 Large distribution board

Claims (5)

A microcapsule in which a fire extinguishing agent is enclosed, wherein the fire extinguishing agent contains dodecafluoro-2-methylpentan-3-one (FK-5-1-12) and a soluble ammonium phosphate salt. Microcapsules. A fire-extinguishing sheet, which is formed by mixing the microcapsules according to claim 1 with an ink composed of a water-soluble resin and a curing agent, kneading into fibers, and solidifying into a plate shape. The fire-extinguishing sheet according to claim 2, wherein an adhesive layer for sticking to an adherend is provided on one surface of the fire-extinguishing sheet, and the adhesive layer is peeled off from an adhesive surface to the adherend. A fire-extinguishing sheet, characterized by comprising a release sheet that can be stuck together. A fire-extinguishing cord, which is formed by mixing the microcapsules according to claim 1 with an ink composed of a water-soluble resin and a curing agent, kneading into fibers, and solidifying into a string shape. An auxiliary tool for sticking the fire-extinguishing sheet according to claim 2 or 3 to a plug-in connector for wiring, which is fixed when inserting the insertion plug into the plug receiver and is parallel to the plug receiver. And an upper surface that is perpendicular to the fixing surface and covers the insertion plug.

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