Fireproof material, electric wire with fireproof material, and method for laying electric wire

Abstract

To suppress burning such that an inclusion body is partially melt and crushed when being heated and internal liquid leaks and is oriented toward a heat source.SOLUTION: A fireproof material 20 includes: an inclusion body 21 having a contact surface coming into contact with an electric wire 10; and a liquid (fire-extinguishing agent 22) filled into the inclusion body 21 and having heat insulation property and non-combustible property. A material constituting the contact surface has a melting point that is a first temperature higher than a heatproof temperature of the electric wire 10. The inclusion body 21 melts from at least part of the contact surface when being heated by a heat source and exceeding a heatproof temperature, and then the liquid leaked from the inclusion body 21 is oriented toward the heat source.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fireproofing material, a fireproofing-equipped electric wire, and an electric wire laying method. [Background technology]

[0002] Electric wires are generally installed in places that are not visible on a daily basis, such as culverts, conduits, and switchboards. Therefore, it is difficult to detect abnormalities such as overheating or fires occurring in the wires.

[0003] For the purpose of early detection of abnormal overheating of electric wires, electric wires have been proposed that contain an odor-generating substance inside them, which causes the odor to be emitted above a certain temperature, and electric wires that have a thermochromic pigment kneaded into the outer sheath, which causes the color to change due to abnormal heat generation (see Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 61-112521 [Patent Document 2] Japanese Patent Application Publication No. 10-241470 Summary of the Invention [Problem to be solved by the invention]

[0005] Although the above electric wire can contribute to early detection of an abnormality such as overheating in the electric wire, it cannot prevent heat generation or fire.

[0006] The present invention provides a fireproofing material that can suppress abnormal heat generation or ignition of objects that it comes into contact with, an electric wire with fireproofing material that can suppress abnormal heat generation or ignition, and an electric wire laying method. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the fire retardant material according to the present invention has the following features. an enclosure having a contact surface that contacts the contact object; an insulating and non-flammable liquid enclosed in the enclosure; the melting point of the material constituting the contact surface is higher than the heat resistance temperature of the contact object, the enclosed body is heated by a heat source so that at least a portion of the contact surface exceeds the heat-resistant temperature, melting the liquid, and the liquid leaking from the enclosed body flows toward the heat source; Fire protection material.

[0008] In order to achieve the above-mentioned object, the fire retardant-equipped electric wire according to the present invention has the following features. The contact object is an electric wire having a conductor and a sheath covering the outer periphery of the conductor; the fire-stop material attached to at least a portion of the sheath; Fire-resistant electric wire equipped with

[0009] In order to achieve the above-mentioned object, the electric wire laying method according to the present invention has the following features. Laying an electric wire as the contact object, The fireproofing material is attached to the electric wire. How to lay electric wires.

[0010] In order to achieve the above-mentioned object, the electric wire laying method according to the present invention has the following features. The fireproofing material is attached to the electric wire that is the contact object, laying the electric wire with the fireproofing material attached; How to lay electric wires. [Effects of the Invention]

[0011] According to the present invention, abnormal heat generation or ignition of an object to be contacted can be suppressed.

[0012] The present invention has been briefly described above. The details of the present invention will become clearer by reading the following detailed description of the invention (hereinafter referred to as "embodiments") with reference to the accompanying drawings. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view of a fire-retardant material according to a first embodiment of the present invention and a fire-retardant-equipped electric wire to which the fire-retardant material is attached, where (A) shows the state before filling with a fire-extinguishing agent, and (B) shows the state after filling with the fire-extinguishing agent. [Figure 2] FIG. 2 is a perspective view of the fireproofing material-equipped electric wire when heated. [Figure 3] FIG. 3 is a perspective view schematically showing a fireproofing material according to the second embodiment. [Figure 4] FIG. 4 is a perspective view of a fire-resistant electric wire to which a fire-resistant material according to the second embodiment is attached. [Figure 5] FIG. 5 is a perspective view schematically showing a fireproofing material according to the third embodiment. [Figure 6] FIG. 6 is a perspective view of a fire-resistant electric wire to which a fire-resistant material according to the third embodiment is attached. [Figure 7] FIG. 7 is a perspective view of a fireproofing material according to the fourth embodiment. [Figure 8] FIG. 8 is a perspective view of a fire-resistant electric wire to which a fire-resistant material according to the fourth embodiment is attached. [Figure 9] FIG. 9 is a front view of a switchboard with fire retardant material attached. DETAILED DESCRIPTION OF THE INVENTION

[0014] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0015] (First embodiment) 1A and 1B are perspective views of a fire-resistant material 20 according to a first embodiment of the present invention and a fire-resistant electric wire 1 to which the fire-resistant material 20 is attached, in which (A) shows the state before filling with a fire-extinguishing agent 22 and (B) shows the state after filling with the fire-extinguishing agent 22. The fire-resistant electric wire 1 includes the fire-resistant material 20 and an electric wire 10 that is a contact object with which the fire-resistant material 20 comes into contact.

[0016] The electric wire 10 of this embodiment includes a conductor 11 through which a current flows, an insulator 12 that covers the outer periphery of the conductor 11, and a sheath 13 that covers the outer periphery of the conductor 11 and the insulator 12. The conductor 11 is, for example, a copper wire. The insulator 12 is made of, for example, a resin such as cross-linked polyethylene. The sheath 13 is made of, for example, a vinyl resin. The electric wire 10 may be, for example, a triplex type 600V cross-linked polyethylene insulated vinyl sheath cable.

[0017] The fire retardant 20 includes an enclosure 21 having a contact surface that contacts the electric wire 10, and an insulating, non-flammable liquid extinguishing agent 22 enclosed in the enclosure 21. As shown in FIG. 1(A), an operator injects the extinguishing agent 22 into the injection port 23 of the enclosure 21 using, for example, an injection tool 40, causing the enclosure 21 to expand as shown in FIG. 1(B), filling the enclosure 21 with the extinguishing agent 22. The extinguishing agent 22 is a so-called high-performance liquid, such as Novec manufactured by 3M. The boiling point of the extinguishing agent 22 is set higher than the melting point of the enclosure 21. A valve is provided at the injection port 23 to prevent backflow of the extinguishing agent 22.

[0018] The enclosure 21 of the embodiment is made of a resin that melts at a predetermined temperature. The enclosure 21 is an annular sleeve having a hollow portion capable of containing the fire extinguishing agent 22 and a tubular structure that can be attached to the outer periphery of the electric wire 10. That is, the enclosure 21 has a life ring-like structure. The length of the enclosure 21 is appropriately set depending on the length of the electric wire 10, which is the contact object, and may be, for example, approximately 1 meter. The enclosure 21 has an inner circumferential surface, an outer circumferential surface, and a side surface connecting the inner circumferential surface and the outer circumferential surface, and the inner circumferential surface, the outer circumferential surface, and the side surface form a hollow portion capable of containing the fire extinguishing agent 22. The enclosure 21 can be expanded and deformed by injecting the fire extinguishing agent 22 into the hollow portion. The inner circumferential surface of the expanded enclosure 21 becomes the contact surface that comes into contact with the electric wire 10. Because the enclosure 21 has a tubular structure that allows the electric wire 10 to be inserted therethrough, the enclosure 21 can be easily attached to the electric wire 10 by covering the electric wire 10. In this example, the inner peripheral surface of the enclosure 21 is in direct contact with the sheath 13 that is disposed around the electric wire 10 .

[0019] The melting point of the material constituting at least the contact surface of the enclosure 21 is a first temperature that is higher than the heat resistance temperature of the electric wire 10 that is the contact object (heat resistance temperature<first temperature). The material of the enclosure 21 may be, for example, the same as the material of the insulator 12 of the electric wire 10. The material of the enclosure 21 may be, for example, a resin that melts at 70 to 100 degrees. FIG. 2 is a perspective view of the fire-resistant electric wire 1 when heated. Electric wires are generally laid in places that are not visible on a daily basis, such as culverts, conduits, and switchboards. Therefore, it is difficult to detect abnormalities such as heat generation or fire in the electric wire. For example, if the electric wire 10 abnormally overheats and a heat source is generated in part of the electric wire 10, this may lead to a fire.

[0020] In this embodiment, the melting point of the material constituting at least the contact surface of the enclosure 21 is a first temperature higher than the heat-resistant temperature of the electric wire 10, which is the contact object (heat-resistant temperature<first temperature). The melting point of the material constituting at least the contact surface of the enclosure 21 is based on the short-term overload temperature (short-term allowable temperature) of the contact object, and may be 105°C if the sheath 13 of the electric wire 10 is made of cross-linked polyethylene or 75°C if it is made of polyvinyl chloride (PVC). The melting point of the enclosure 21 is adjusted to melt at a predetermined temperature using a resin additive that improves heat resistance. When a heat source occurs, the enclosure 21 is heated by the heat source to the heat-resistant temperature, and ultimately, the first temperature or higher, and at least a portion of the contact surface melts, and the fire extinguishing agent 22 leaking from the enclosure 21 is directed toward the heat source. In this embodiment, for example, a crack C occurs in the enclosure 21, including the contact surface, and the fire extinguishing agent 22 leaking from the crack C is directed toward the heat source. Furthermore, the extinguishing agent 22 vaporizes to generate gas G, and at least a part of the gas G moves toward the heat source. That is, the extinguishing agent 22 leaking from the enclosure 21 moves toward the heat source in a liquid or gaseous state.

[0021] According to the fire-retardant material 20 of this embodiment, when the inclusion 21 is heated by a heat source and a portion of the inclusion 21 reaches or exceeds the first temperature, the portion of the inclusion 21 melts and breaks down, causing the fire-extinguishing agent 22 inside to leak and move toward the heat source. The fire-extinguishing agent 22, which is a non-flammable liquid, and / or the gas G formed by vaporizing the fire-extinguishing agent 22 move toward the heat source and come into contact with the heat source, thereby suppressing abnormal heat generation or ignition. This makes it possible to suppress electrical fires and extinguish them in their early stages.

[0022] If the electric wire 10 experiences abnormal heat generation, a portion of the sheath 13 may melt. When the fire-retardant material 20 is attached to at least a portion of the sheath 13 of the electric wire 10, even if a portion of the sheath 13 melts, the insulating fire-extinguishing agent 22 adheres to the conductor 11 inside the sheath 13 from the melted portion of the sheath 13, thereby insulating the conductor 11. This prevents heat generation due to a short circuit. This also prevents the electric wire 10 from catching fire. Furthermore, the fire-extinguishing agent 22 is released from the melted portion of the sheath 13, enabling early fire extinguishing in the event of a fire breaking out in the electric wire 10. This makes it possible to prevent the occurrence of a fire caused by the electric wire 10 and extinguish the fire in its early stage without installing large-scale fire-extinguishing equipment, such as a temperature sensor, at the electric wire installation site. Furthermore, the fire-retardant material 20 physically destroys the enclosure 21, thereby releasing the fire-extinguishing agent 22 enclosed therein, eliminating the need for a power source and preventing electrical problems.

[0023] The extinguishing agent 22 may contain a coloring agent such as a fluorescent material. This allows the occurrence of an abnormality to be easily detected visually by the color of the leaked extinguishing agent 22, even without directly visually inspecting the contact object such as the electric wire 10. This allows for early detection of the occurrence of an abnormality.

[0024] The extinguishing agent 22 may contain an aromatic. If the boiling point of the extinguishing agent 22 is the second temperature, the aromatic is released at or above the second temperature. This makes it easier to detect an abnormality by olfactory sense due to the smell of gas G vaporized from the extinguishing agent 22, even without directly visually inspecting the contact object such as the electric wire 10. This allows for early detection of an abnormality.

[0025] (Second embodiment) FIG. 3 is a perspective view schematically illustrating a fire-retardant material 20 according to a second embodiment. In the following description of each embodiment, components having the same or similar functions as those in the first embodiment are designated by the same reference numerals, and redundant description may be omitted. Each of the two fire-retardant materials 20 includes a rectangular enclosure 21. The two enclosures 21 are integrated by a welded joint 25 at both ends, allowing a contact object to be placed between the two fire-retardant materials 20. The integrated enclosures 21 have a cylindrical structure that can be attached to the outer periphery of the electric wire 10. The enclosure 21 of each fire-retardant material 20 is made of resin and has a deformable bag shape. The enclosure 21 has an injection port 23 for injecting a fire-extinguishing agent 22. A valve 24 is provided at the injection port 23 to prevent backflow of the fire-extinguishing agent 22 injected into the enclosure 21.

[0026] 4 is a perspective view of a fire-resistant electric wire 1 to which a fire-resistant material 20 according to the second embodiment is attached. An electric wire 10, which is a contact object, is placed between two fire-resistant materials 20, and two inclusions 21 expand as a result of injecting a fire extinguishing agent 22 into the inclusions, and deform to fit the outer shape of the electric wire 10. When the inclusions 21 containing the fire extinguishing agent 22 come into contact with the electric wire 10, which is a heat source, the fire extinguishing agent 22 leaking from the inclusions 21 can prevent the heat source from igniting and the electric wire 10 from burning.

[0027] (Third embodiment) 5 is a perspective view schematically illustrating a fire-retardant material 20 according to a third embodiment. In the fire-retardant material 20 of this embodiment, the enclosure 21 is a deformable band (tape) made of resin, and has a hollow portion capable of containing a fire-extinguishing agent 22. This fire-retardant material 20 can be easily attached to a long contact object such as an electric wire by attaching it to or wrapping it around the contact object. A screw-type lid may be provided at the inlet 23, making it openable and closable.

[0028] 6 is a perspective view of a fire-resistant electric wire 1 to which a fire-resistant material 20 according to a third embodiment has been attached. The fire-resistant material 20 can be fixed to the electric wire 10 with a fastener 26 such as a cable or a binding wire, after the fire-extinguishing agent 22 has been injected through an injection port 23. Because the inclusion 21 is strip-shaped, the inclusion 21 can be easily attached along the longitudinal direction of the electric wire 10. Note that the fire-extinguishing agent 22 may be injected into the inclusion 21 while it is fixed to the electric wire 10 before injection.

[0029] (Fourth embodiment) 7 is a perspective view of a fire-retardant material 20 according to a fourth embodiment. In this embodiment, the enclosure 21 is composed of a combination of two or more divided bodies 27A and 27B (two in this example). The divided bodies 27A and 27B are made of, for example, a hard resin and have a hollow portion capable of containing the fire-extinguishing agent 22.

[0030] FIG. 8 is a perspective view of a fire-resistant electric wire 1 to which a fire-resistant material 20 according to a fourth embodiment is attached. In this embodiment, two electric wires 10 (not shown) are connected with a bolt, and then a heat-shrinkable tube 29 is placed over the connection point (not shown) of the two electric wires 10. The heat-shrinkable tube 29 is then covered with divided bodies 27A and 27B, which are the enclosure 21. The heat-shrinkable tube 29 is made of a resin that melts at temperatures above 70 degrees, for example. A fire-extinguishing agent 22 is injected into each of the divided bodies 27A and 27B through an injection port 23. The enclosure 21 may be fixed to the connection point (heat-shrinkable tube 29) of the two electric wires 10 using the fixing device 26 shown in FIG. 6.

[0031] According to this embodiment, the electric wire 10 can be easily enclosed from multiple directions, and abnormalities such as heat generation or fire can be effectively suppressed.

[0032] Only one of the two divided bodies 27A, 27B may be used. Also, a gap may be provided between the two divided bodies 27A, 27B. The divided bodies 27A, 27B and the heat-shrinkable tube 29 may be formed integrally. The heat-shrinkable tube 29 shrinks when heat is applied, but a hard molded resin may be used instead of the heat-shrinkable tube 29. The number of divided bodies may be two or more.

[0033] (Use in switchboards) FIG. 9 is a front view of a distribution board 30 to which the fire-retardant material 20 is attached. The distribution board 30 has a distribution board housing 31, and a molded case circuit breaker 32 and a ground fault circuit interrupter 33 are disposed inside the distribution board housing 31. The fire-retardant material 20 is disposed, for example, at an arrangement location A and attached to the electric wire 10. The location of the arrangement location A is not particularly limited, but it may be placed at a high position on the distribution board 30 as in this example. This is because heat is likely to collect at high positions on the distribution board 30, and it is thought that the collected heat would make it easier for the enclosure 21 to melt. It is also thought that the fire-extinguishing agent 22 leaking from the melted enclosure 21 falls downward, making it easier for the fire-extinguishing agent 22 to spread within the distribution board 30.

[0034] Furthermore, since scratches, dust, and the like tend to adhere during terminal work on the electric wires 10, which often cause fires, by locating the location A of the fire-retardant material 20 at the terminal portion of the electric wires 10, heat generation and fire of the electric wires 10 can be effectively suppressed. Furthermore, the location A may be on either the primary side or secondary side of the switchboard 30. Furthermore, the fire-retardant material 20 may be attached near the electric wires 10, for example, on the wall surface of the switchboard housing 31.

[0035] One electric wire installation method using the fire-retardant material 20 of the above-described embodiment is a method in which the electric wire 10, which is the contact object, is installed in a switchboard 30 or other location, and the fire-retardant material 20 is attached to the installed electric wire 10. By attaching the fire-retardant material 20 to the installed electric wire 10, abnormal heat generation and fire at the electric wire installation site can be suppressed.

[0036] Another electric wire installation method using the fireproofing material 20 of the above-described embodiment is a method in which the fireproofing material 20 is attached to the electric wire 10, which is the contact object, and the electric wire 10 with the fireproofing material 20 attached (fireproofed electric wire 1) is installed in a switchboard 30 or other location. By using the fireproofed electric wire 1, abnormal heat generation and fire can be suppressed at the electric wire installation site.

[0037] The heat resistance temperature of the electric wire 10, which is the contact object, may be an allowable temperature defined in standards for electric wires (for example, JCS 0168-1), may be the melting point of the sheath, or may be a specific value determined by experiment.

[0038] The standard for electric wires, JCS 0168-1, specifies the normal allowable temperature, short-term allowable temperature, and short-circuit allowable temperature. The normal allowable temperature is, for example, 90°C for cross-linked polyethylene cable, and the short-term allowable temperature is the temperature that can be endured for a cumulative period of 10 hours or less over a 30-day period, which is 10 to 15°C higher than the normal allowable temperature, for example, 105°C for cross-linked polyethylene cable. The melting point of the material that makes up the enclosure 21 (contact surface) can be set slightly higher than the allowable temperature of the electric wire.

[0039] Although various embodiments have been described above with reference to the drawings, it goes without saying that the present invention is not limited to such examples. It is clear to those skilled in the art that various modifications and alterations can be made within the scope of the claims, and it is understood that such modifications and alterations naturally fall within the technical scope of the present invention. Furthermore, the components of the above-described embodiments may be arbitrarily combined within the scope of the invention. For example, in the above-described embodiment, the enclosure 21 before the extinguishing agent 22 is enclosed is attached to the electric wire 10, and then the extinguishing agent 22 is poured into the enclosure 21. However, the enclosure 21 containing the extinguishing agent 22 may also be attached to the contact object. Furthermore, the electric wire serving as the contact object is not limited, and the type, shape, and structure of the electric wire are not important. For example, the enclosure 21 may be attached to an electric wire formed by twisting together multiple electric wires.

[0040] Here, the features of the embodiments of the fireproofing material, the fireproofing-equipped electric wire, and the electric wire-laying method according to the present invention will be briefly summarized and listed below in [1] to

[10] .

[0041] [1] An enclosure (21) having a contact surface that contacts a contact object (electric wire 10, switchboard housing 31), and a liquid (fire extinguishing agent 22) having insulating properties and non-flammable properties enclosed in the enclosure, a melting point of at least the material constituting the contact surface is a first temperature that is higher than the heat-resistant temperature of the contact object; the enclosed body is heated by a heat source so that at least a portion of the contact surface exceeds the heat-resistant temperature, melting the liquid, and the liquid leaking from the enclosed body flows toward the heat source; Fire protection material (20).

[0042] According to the fire retardant having the configuration [1] above, when the inclusion is heated by a heat source and a part of the inclusion reaches or exceeds the first temperature, the part of the inclusion melts and breaks down, causing the liquid inside to leak and move toward the heat source. The non-flammable liquid or the vaporized gas of this liquid moves toward the heat source and comes into contact with the heat source, thereby suppressing abnormal heat generation or ignition.

[0043] [2] The enclosure has a hollow portion capable of containing the liquid and a cylindrical structure that can be attached to the outer periphery of the electric wire, which is the contact object. The fire retardant material described in [1] above.

[0044] According to the fireproofing material having the above-mentioned configuration [2], the enclosure can be easily attached to the electric wire by covering the electric wire with the enclosure.

[0045] [3] The liquid contains a colorant. The fire retardant material described in [1] or [2] above.

[0046] According to the fireproofing material having the above-mentioned configuration [3], the color of the leaked liquid makes it easier to visually detect the occurrence of an abnormality without directly visually inspecting the contact object.

[0047] [4] The liquid contains a fragrance, the boiling point of the liquid is a second temperature, and the fragrance is released at or above the second temperature. A fire retardant material according to any one of [1] to [3] above.

[0048] According to the fireproofing material having the above-mentioned configuration [4], it is easy to detect abnormal occurrences by smelling the smell of the gas produced by vaporizing the liquid, even without directly seeing the object that has come into contact with it.

[0049] [5] The enclosure is in the shape of a deformable bag. A fire retardant material according to any one of [1] to [4] above.

[0050] According to the fireproofing material having the above-mentioned configuration [5], the enclosed body is easily brought into contact with the object to be contacted due to deformation, so that combustion can be effectively suppressed.

[0051] [6] The inclusion body is composed of a combination of two or more divided bodies (27A, 27B), A fire retardant material according to any one of [1] to [4] above.

[0052] According to the fireproofing material having the above-mentioned configuration [6], it is easy to surround the object to be contacted from multiple directions, and therefore combustion can be effectively suppressed.

[0053] [7] The inclusion bodies are band-shaped. A fire retardant material according to any one of [1] to [4] above.

[0054] According to the fireproofing material having the configuration [7] above, the band-shaped inclusion body can be easily attached to a long contact object such as an electric wire by attaching it to or wrapping it around the contact object.

[0055] [8] The contact object is an electric wire having a conductor (11) and a sheath (13) covering the outer periphery of the conductor; [1] to [7] attached to at least a part of the sheath; and Fire-resistant electric wire (1).

[0056] According to the fire-resistant electric wire having the configuration [8] above, even if the electric wire experiences abnormal heat generation and a part of the sheath melts, the insulating liquid adheres to the conductor inside the sheath from the melted part of the sheath, insulating the conductor, preventing heat generation due to a short circuit and thus suppressing the electric wire from catching fire.

[0057] [9] Laying the electric wire that is the contact object, The fire retardant material according to any one of [1] to [7] is attached to the electric wire. How to lay electric wires.

[0058] According to the electric wire laying method configured as described above in [9], by attaching a fireproofing material to the laid electric wire, abnormal heat generation or fire at the electric wire laying site can be suppressed.

[0059]

[10] Attach the fire retardant material according to any one of [1] to [7] to the electric wire that is the contact object, laying the electric wire with the fireproofing material attached; How to lay electric wires.

[0060] According to the electric wire laying method having the configuration

[10] above, by using an electric wire that is resistant to ignition, abnormalities such as heat generation or ignition at the electric wire laying site can be suppressed. [Explanation of symbols]

[0061] 1. Fire-resistant electric wire 10 Electric wire 11 Conductor 12 Insulators 13 Sheath 20 Fire protection materials 21 Inclusion bodies 22 Fire extinguishing agent (liquid) 23 Inlet 24 valves 25 Welded area 26 Fixtures 27A, 27B split body 29 Heat shrink tubing 30 Switchboard 31 Distribution board enclosure 32 Circuit breaker 33 Earth leakage breaker 40 Injector

Claims

1. an enclosure having a contact surface that contacts the contact object; an insulating and non-flammable liquid enclosed in the enclosure; a melting point of a material constituting the contact surface is a first temperature that is higher than a heat-resistant temperature of the contact object, the enclosed body is heated by a heat source so that at least a portion of the contact surface exceeds the heat-resistant temperature, melting the liquid, and the liquid leaking from the enclosed body flows toward the heat source; Fire protection material.

2. the enclosure has a hollow portion capable of containing the liquid and a tubular structure that can be attached to the outer periphery of the electric wire that is the contact object; The fire retardant material according to claim 1.

3. the liquid comprises a colorant; The fire retardant material according to claim 1.

4. The liquid contains a fragrance, the boiling point of the liquid is at a second temperature, and the fragrance is released at or above the second temperature. The fire retardant material according to claim 1.

5. The enclosure is in the shape of a deformable bag. The fire retardant material according to claim 1.

6. The inclusion body is composed of a combination of two or more divided bodies. The fire retardant material according to claim 1.

7. The inclusion bodies are strip-shaped. The fire retardant material according to claim 1.

8. The contact object is an electric wire having a conductor and a sheath covering the outer periphery of the conductor; The fire-stop material according to claim 1 attached to at least a portion of the sheath; Fire-resistant electric wire equipped with

9. Laying an electric wire as the contact object, The fire retardant material according to claim 1 is attached to the electric wire. How to lay electric wires.

10. The fireproofing material according to claim 1 is attached to an electric wire that is the contact object, laying the electric wire with the fireproofing material attached; How to lay electric wires.

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