JP2016118074A - Core structure and simple partition wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a core structure and a simple partition wall that can stably hold a thermal insulation material superior in thermal insulating properties in the fire more than a conventional thermal insulation material, in a hollow part such as a metallic partition wall and a fire door.SOLUTION: (1) A plate-like core structure 2 is disposed of each part of a fireproof heat absorbing part 3a, an air layer 4, a fireproof thermal insulation part 5, the air layer 4 and a fireproof heat absorbing part 3b, in this order, from a first plate surface 2a of the core structure toward a second plate surface 2b. In the core structure, the fireproof thermal insulation part has an insulating member containing inorganic fibers. The fireproof heat absorbing part includes: a plate-like first honeycomb structure 8 where multiple through-holes 7 are juxtaposed across a partition wall; a thermal insulation material 9 filled in the multiple through-holes and containing porous materials and free water; and the coating material for coating both plate surfaces of the first honeycomb structure. (2) The fireproof thermal insulation part of the core structure includes a repeated structure where each member of the insulating member, the air layer and the insulating member is disposed in this order.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a core structure and a simple partition wall. More specifically, the present invention relates to a core structure and a simple partition wall using a heat insulating material capable of absorbing combustion heat during a fire.

  Preventing the spread of fire in the event of a fire is provided by providing a fire prevention section in the building. The fire wall occupies most of the fire protection area. The fire wall has heat insulation during fire for 60 minutes, preventing the outflow of fire smoke from the area where the fire occurred (fire area) and suppressing the temperature rise and ignition in the non-fire area. However, the main material of the board-type firewall generally installed is a gypsum board, so it is heavy and thick. A typical board-type firewall has a thickness of about 115 mm. On the other hand, there is a need to install a simple partition wall made of metal such as steel or aluminum in place of the fire wall made of gypsum board from the viewpoint of improving the workability and design of the fire prevention section of the building.

  The thickness of a general metal simple partition wall is about 50 mm to 80 mm, and has the merit of being thin and light, but has the demerit of being inferior in heat insulation during a fire. In order to improve the heat insulating property at the time of fire, a heat insulating material is loaded into the hollow structure of a simple metal partition wall (Patent Document 1). When a rock wool type heat insulating material is used as such a heat insulating material, the heat insulating property at the time of fire is improved to some extent, but it is not necessarily sufficient.

  Further, for metal fire doors (fire doors), as in the case of metal simple partition walls, further improvement in heat insulation during a fire is desired. Steel fire doors installed at the main openings in the fire compartment have an automatic closing mechanism. However, even if the fire door is closed, if the fire gains momentum, the heat on the fire side is transferred to the non-fire side by radiation, convection, etc. through the fire door itself. Despite the fire doors being closed, the combustible material on the non-fire surface that receives heat ignites, increasing the risk of spreading from the fire side to the non-fire side.

JP 2000-104365 A

  Fig. 1 shows that conventional rock wool insulation is loaded between two steel plates (300 mm square, 0.5 mm thickness) with a thickness of 50 mm, and is specified by ISO834 for one steel plate (heating surface). It is the result of having monitored the temperature change of the other steel plate (non-heating surface) when incident heat is applied over 60 minutes according to the standard heating curve currently performed. The non-heated surface temperature shows a value higher than the standard value for preventing the spread of fire (temperature before heating + 140 ° C.), and it can be seen that the heat insulating property of the conventional heat insulating material at the time of fire is not sufficient.

  As will be described later, the present inventors have invented a heat insulating material that is superior in heat insulation during a fire than a conventional rock wool type heat insulating material.

  In view of the above circumstances, the present invention provides a core structure capable of stably holding a heat insulating material that is superior in heat insulation during a fire than a conventional heat insulating material in a hollow portion such as a metal partition wall or a fire door. A body and a simple partition wall are provided.

In order to achieve the above object, the present invention provides the following means.
The core structure of the present invention is a plate-like core structure, and is directed from the first plate surface to the second plate surface of the core structure, and includes a heat-resistant heat absorbing part / air layer / fire-resistant heat insulating part / air. Each part is arranged in the order of layer / fireproof heat absorbing part, the fireproof heat insulating part has a heat insulating member (fiber-containing heat insulating member) containing inorganic fibers, and the fireproof heat absorbing part has a plurality of through holes separating the partition walls. Plate-like first honeycomb structures arranged side by side, a heat insulating material filled in the plurality of through-holes and containing a porous material and free water, and both plate surfaces of the first honeycomb structure And a covering material for covering the surface.

  In the core structure of the present invention, when the first plate surface receives heat from the outside, heat is absorbed by the refractory heat absorbing portion on the first plate surface side, and heat conduction is performed by the air layer and the refractory heat insulating portion. In addition, heat can be absorbed by the refractory heat absorption part on the second plate surface side. As a result, the heat reaching the surface of the second plate surface can be significantly reduced.

  In the fire-resistant and heat-absorbing part constituting the core structure of the present invention, the plate-like first honeycomb structure holds a heat insulating material. Furthermore, since the covering material covers both the plate surfaces (surfaces) of the first honeycomb structure, it is possible to prevent the heat insulating material from spilling from the opening of the through hole constituting the first honeycomb structure. For this reason, even if the heat insulating material is an irregular shape such as gravel or powder, the heat insulating material follows the shape of the through holes partitioned by the partition walls constituting the first honeycomb structure, and the inside of the through holes The heat insulating material filled in can be stably supported. As a result, the core structure can be easily loaded into a hollow part such as a simple metal partition wall or a fire door, and the heat insulating material can be stably held in the hollow part.

  The heat insulating material filled in the first honeycomb structure includes a porous material and free water. When this insulation receives heat from the fire, the free water contained in the insulation absorbs the heat, and when the free water evaporates, it takes the heat of vaporization from the core structure with the insulation. The temperature of the core structure is kept low. As a result, the heat resistance and heat insulation of the core structure of the present invention are much better than conventional heat insulating materials.

  It is preferable that the fireproof and heat insulating portion constituting the core structure of the present invention includes a repeating structure in which the respective members are arranged in the order of the heat insulating member (fiber-containing heat insulating member) / the air layer / the heat insulating member. With this configuration, the heat insulating property in the fireproof heat insulating part is further improved.

In the refractory heat insulating portion constituting the core structure of the present invention, it is preferable that four or more air layers are arranged.
With this structure, in the refractory heat insulating part, four or more air layers and five or more heat insulating members (fiber-containing heat insulating members) separating these air layers are arranged, so that the heat resistance in the refractory heat insulating part is Even better.

The fireproof heat insulating portion of the core structure of the present invention includes a plate-like second honeycomb structure, and the heat insulating member (fiber-containing heat insulating member) includes a plurality of through holes constituting the second honeycomb structure. It may be filled inside.
With this configuration, the plurality of through holes constituting the second honeycomb structure can easily hold the heat insulating member containing inorganic fibers. Even when the heat insulating member is flexible and irregular in shape, the heat insulating member can be uniformly arranged in the longitudinal direction of the plate-shaped core structure by supporting the heat insulating member with the second honeycomb structure.

In the core structure of the present invention, it is preferable that a heat reflecting film made of an inorganic material or a metal is disposed on the covering material on at least one plate surface of the first honeycomb structure.
With this configuration, it is possible to further reduce the degree to which the heat reflection film reflects at least part of the heat incident from the outside and the heat is transmitted to the inside of the core structure. Furthermore, the heat reflecting film reinforces the structural strength of the first honeycomb structure, and more reliably prevents the free water constituting the heat insulating material filled in the first honeycomb structure from being evaporated and lost.

In the core structure of the present invention, it is preferable that a heat reflecting film made of an inorganic material or a metal is disposed on at least one plate surface of the second honeycomb structure.
With this configuration, when the heat incident from the outside passes through the fireproof heat absorption part and reaches the fireproof heat insulation part, at least a part of the heat is reflected, and the heat is directed to the opposite side (back side) of the core structure. The degree of transmission can be further reduced. Further, the heat reflecting film reinforces the structural strength of the second honeycomb structure and can support the heat insulating member filled in the second honeycomb structure.

In the air layer constituting the core structure of the present invention, it is preferable that a plate-like third honeycomb structure or a spacer member is provided.
With this configuration, it is possible to prevent the air layer from being deformed or crushed when stress is applied in the thickness direction of the core structure. That is, the thickness of the air layer arranged in each part can be reliably maintained.

In the heat insulating material constituting the core structure of the present invention, it is preferable that the free water is held by the porous material.
Since the free water which comprises a heat insulating material is hold | maintained at the porous material, it can suppress that a free water flows out from a heat insulating material. Moreover, the handleability of a heat insulating material improves further, and a heat insulating material can be easily filled in the through-hole of a core structure.

The heat insulating material constituting the core structure of the present invention preferably contains alum or mica.
By including alum or mica in the heat insulating material, the heat resistance properties of alum and mica can be imparted to the heat insulating material.

In the heat insulating material constituting the core structure of the present invention, a ratio (g / cm ³ ) obtained by dividing the mass (g) of the free water by the volume (cm ³ ) of the porous material is 0.04 to 0.00. 30 is preferable.
When the ratio is 0.04 or more, the free water sufficiently absorbs heat at the time of fire, and the fire spread prevention performance is further improved.
When the ratio is 0.30 or less, free water is sufficiently retained in the porous material, and excess water can be reduced or eliminated, so that the heat insulating material can be easily transported, and the first honeycomb structure It becomes easier to fill the through holes constituting the body with the heat insulating material.
Here, the volume of the porous material is defined as “JIS A 5007 5.2.2” test method. It means the volume occupied when placed. Therefore, it is not the true size that the constituent material of the porous material itself occupies in the space.

The simple partition wall of the present invention is characterized in that the core structure is provided inside.
Since the said simple partition wall is equipped with the core structure excellent in heat resistance and heat insulation, it is excellent in heat insulation and fire spread prevention performance remarkably rather than the conventional simple partition wall.

The core structure of this invention can hold | maintain stably the heat insulating material excellent in the heat insulation at the time of a fire in hollow parts, such as a metal partition wall and a fire door. Further, since the heat insulating material constituting the core structure of the present invention is superior in heat insulating properties than the conventional heat insulating material, by loading the core structure of the present invention on a metal partition wall or fire door, the metal The heat resistance, heat insulation and fire spread prevention performance of the partition wall and fire door can be significantly improved.
The simple partition wall of the present invention is far superior in heat resistance, heat insulation and fire spread prevention performance than the conventional simple partition wall.

The result of comparing the heat insulation properties of the specimens imitating a simple partition wall when loaded with a conventional rock wool-based heat insulating material (Comparative Example 1) and when loaded with the core structure of the present embodiment (Example 1) It is. It is a disassembled perspective view of the simple partition wall provided with the core structure of this embodiment. It is a side view of the core structure shown in FIG. It is a result which shows the heat insulation at the time of the fire of the steel simple partition wall produced as a reference example. It is a result which shows the heat insulation in the time of the fire of the steel simple partition wall produced as a reference comparative example. It is a result which shows the heat insulation in the time of the fire of the steel simple partition wall produced as a reference comparative example.

Hereinafter, the present invention will be described based on preferred embodiments.
《Core structure, simple partition wall》
As shown in FIG. 2, the simple partition wall 1 includes a core structure 2 that is an example of the present invention, a force frame 11 that surrounds the outer periphery of the core structure 2, and both plate surfaces 2 a of the core structure 2. And a metal plate 12 attached to 2b via an adhesive 13.
In FIG. 2, the covering material 10 that covers both the plate surfaces 8a and 8b of the first honeycomb structure 8 is omitted and not shown.

  The plate-like core structure 2 (core member) includes a fire-resistant heat absorbing part 3, an air layer 4, and a fire-resistant heat insulating part 5. A laminated structure viewed from the side of the core structure 2 is shown in FIG. From the first plate surface 2a of the core structure 2 to the second plate surface 2b, the refractory heat absorbing part 3a (3) / air layer 4a (4) / refractory heat insulating part 5 / air layer 4b (4) / fire resistant. Each part is arrange | positioned in order of the heat absorption part 3b (3).

  The thickness of the core structure 2 (the distance between the first plate surface 2a and the second plate surface 2b) is the sum of the thicknesses of the respective parts, and the thickness is not particularly limited, but is preferably 40 mm to 80 mm, for example. . Sufficient heat resistance and heat insulation are obtained when it is at least the lower limit of the above range. It is easy to load in the hollow part of a thin simple partition wall or a fire door as it is below the upper limit of the said range.

<Fireproof insulation part>
The refractory heat insulating portion 5 includes a plurality of heat insulating members 6 (fiber-containing heat insulating members) including inorganic fibers, and includes a heat insulating member 6a (6) / air layer 4c (4) / heat insulating member 6c (6) / air layer 4e (4 ) / Heat insulating member 6e (6) / air layer 4f (4) / heat insulating member 6d (6) / air layer 4d (4) / heat insulating member 6b (6) in this order, the first plate surface 2a of the core structure 2 To the second plate surface 2b, each member is arranged in a repeating structure.

  The number of air layers 4 constituting the repeating structure is not particularly limited, and it is preferable that the number is larger from the viewpoint of improving the heat insulating property of the refractory heat insulating portion 5. For example, four or more air layers are provided in the repeating structure. Is preferred. The upper limit of the number is not particularly limited, but may be, for example, 10 layers or less from the viewpoint of reducing the thickness of the core structure 2 in order to improve the design of a simple partition wall or the like in which the core structure 2 is loaded.

  The thickness of each air layer 4a to 4e constituting the core structure 2 is not particularly limited, and examples thereof include a thickness of 1 mm to 5 mm. If it is this thickness, the heat insulation of the core structure 2 can fully be improved. The thickness of each air layer 4 may be the same or different.

  A plurality of spacer members 14 are arranged in each air layer 4. The spacer member 14 is sandwiched in the gap between the two heat insulating members 6 or in the gap between the heat insulating member 6 and the refractory heat absorbing portion 3, and when the stress is applied in the thickness direction of the core structure 2, each air layer 4 Crushing or deformation is suppressed, and the thickness of each air layer 4 is maintained. The number and arrangement density of the spacer members 14 are not particularly limited, and are preferably the number and arrangement density that can be arranged uniformly over the entire range of the air layer 4 constituted by the gaps between the members.

  The material of the spacer member 14 is not particularly limited, and may be, for example, an elastic body such as rubber or a spring or a non-elastic body. As the non-elastic spacer, for example, a ceramic piece having excellent heat resistance is preferable. The shape of the spacer member is not particularly limited, and examples thereof include a columnar shape, a square shape, and a spherical shape.

  In the present embodiment, the spacer member 14 is disposed in the air layer 4. However, as another configuration, a plate-shaped third honeycomb structure (not shown) may be disposed in the air layer 4. Similar to the first honeycomb structure described later, the third honeycomb structure is a plate-like structure in which a plurality of through holes separated by partition walls are arranged in parallel, and the through direction of the through holes is the air layer 4. It arrange | positions so that it may face in the thickness direction, and air is hold | maintained in a through-hole. The third honeycomb structure holding the air is sandwiched in the gap between the two heat insulating members 6 (fiber-containing heat insulating members) or in the gap between the heat insulating members 6 and the refractory heat absorbing portion 3. By disposing the third honeycomb structure in this manner, the third honeycomb structure can maintain the thickness of each air layer 4 in the same manner as the spacer member 14. Furthermore, the third honeycomb structure can restrict air convection in the air layer 4 by a plurality of through holes. As a result, the heat insulation property of the air layer 4 provided with the third honeycomb structure can be further improved.

  Examples of the heat insulating member 6 containing inorganic fibers include conventionally known rock wool, ceramic wool, and glass wool. In this embodiment, a heat insulating material block in which rock wool is wrapped in a resin bag and the shape is adjusted is used. The thickness of the heat insulating member 6 is not particularly limited, and the thickness is preferably as thick as possible from the viewpoint of enhancing the heat insulating property of the refractory heat insulating portion 5, and examples thereof include a thickness of 5 mm to 10 mm. What is necessary is just to adjust suitably the thickness of each heat insulation member 6 according to the thickness of the hollow part which loads the core structure 2, and the lamination | stacking number of the heat insulation members 6 in the fireproof heat insulation part 5. FIG. The thickness of the plurality of heat insulating members 6 constituting the fireproof heat insulating portion 5 may be the same or different.

  As another embodiment, instead of packing the heat insulating member 6 such as rock wool in a resin bag, an embodiment in which the heat insulating member 6 is filled in the through holes of the second honeycomb structure (not shown) can be exemplified. According to this embodiment, since the second honeycomb structure supports the heat insulating member 6, it is not necessary to pack it with a resin bag. Moreover, by arranging the second honeycomb structure and the third honeycomb structure alternately, it is possible to easily assemble the refractory heat insulating portion 5 having the repeated structure.

  The second honeycomb structure is a plate-like structure in which a plurality of through holes separated by partition walls are arranged in parallel, as in the above-described third honeycomb structure and the first honeycomb structure described later. Are arranged so that the penetrating direction thereof faces the thickness direction of the air layer 4. The second honeycomb structure in which the heat insulating member 6 (fiber-containing heat insulating member) is filled in the through hole is sandwiched between the two air layers 4. By arranging the second honeycomb structure in this way, the second honeycomb structure can maintain the thickness of the heat insulating member 6.

  Among the first honeycomb structure, the second honeycomb structure, and the third honeycomb structure, at least one plate surface (first plate surface) of any of the honeycomb structures has an inorganic material or a metal, or It is preferable that a heat reflecting film made of an inorganic material or a metal coated with a heat reflecting paint is disposed. More preferably, the heat reflecting film is disposed over the entire surface of one of the honeycomb structures.

  Examples of the heat reflecting film include a sheet or thin plate made of an inorganic material such as ceramics, and a metal foil (sheet) or metal plate made of a metal such as aluminum. Although the thickness in particular of a heat | fever reflection film is not restrict | limited, For example, several micrometers-several hundred micrometers are preferable. A method for attaching the heat reflecting film to the plate surface of the honeycomb structure is not particularly limited, and examples thereof include a method of attaching using a bonding agent, a nail, an adhesive tape, and the like.

<Fire endothermic part>
A plate-like first honeycomb structure 8 constituting the fire-resistant and heat-absorbing part 3 installed on both sides of the core structure 2 is constituted by a plurality of through-holes 7 arranged in parallel with a partition wall therebetween (FIG. 2). reference). The plurality of through holes 7 are filled with a heat insulating material 9, and one plate surface 8 a (first plate surface) and the other plate surface 8 b (second plate surface) of the first honeycomb structure 8 are formed. A covering material 10 to be covered is disposed (see FIG. 3).

  The covering material 10 is bonded to one surface 8a and the other surface 8b of the first honeycomb structure 8 by a heat resistant adhesive (not shown). Since the covering material 10 covers and covers both openings of the through hole 7, the heat insulating material 9 is filled in the through hole 7 in a sealed state. For this reason, the porous material and free water constituting the heat insulating material 9 do not flow out of the first honeycomb structure 8 and are stably held.

[First honeycomb structure]
Examples of the plate-like first honeycomb structure 8 in which the plurality of through holes 7 are arranged in parallel in the thickness direction with the partition walls interposed therebetween include, for example, a paper core described in JP-A-2002-276255. The material of the partition wall constituting the through hole 7 is not limited to paper, and any material can be applied as long as it is a material that can form the through hole 7 that can be filled with the heat insulating material 9, for example, metal, ceramics, resin (plastic). , Materials such as glass and paper. Among these, ceramics excellent in heat resistance and paper excellent in light weight are preferable. When paper is used as the partition material, non-combustible paper (flame retardant paper) is more preferable. As the non-combustible paper, for example, non-combustible paper made of an inorganic material such as silicon, paper dipped in a solution containing particles made of an inorganic material such as ceramics or silica, and the like can be applied. Commercially available products can be used for these noncombustible papers. Moreover, when using paper as a material of a partition, it is preferable to water-repellently process a partition by a normal method so that the paper may absorb the free water which comprises the heat insulating material 9, and the said paper may not lose shape.

  In general, a honeycomb structure often refers to an aggregate of through-holes (cells) having a hexagonal cross section perpendicular to the thickness direction. However, in the honeycomb structure constituting the core structure of the present invention, the cross-sectional shape of the through hole is not particularly limited, and may be any shape such as a polygon such as a 3-12 polygon, a circle, an ellipse, or an indefinite shape. May be. The cross section of the through-hole constituting the honeycomb structure may have one shape or size, or a plurality of shapes or sizes may be mixed. Among these, in view of mechanical strength and mass productivity, a through-hole having a hexagonal shape, a perfect circular shape, or an elliptical shape is preferably used.

  The diameter of a circle having a diameter equal to the area of the through hole 7 in the cross section of the through hole 7 of the first honeycomb structure 8 (cross section orthogonal to the thickness direction of the honeycomb structure) (circle of equivalent area) is not particularly limited. However, it is preferable to increase the diameter in view of filling the heat insulating material 9 as much as possible in the entire first honeycomb structure 8, and in view of increasing the structural strength of the first honeycomb structure 8, It is preferable to reduce the diameter. From the viewpoint of achieving this balance, specifically, the diameter is preferably 1 cm to 8 cm.

  The thickness of the first honeycomb structure 8 is not particularly limited, but is preferably about 4 cm to 8 cm from the viewpoint of filling a sufficient amount of the heat insulating material 9. Moreover, when it is 4 cm or more, the outer peripheral portion of the first honeycomb structure 8 or the strength bone 11 is installed so as to be in contact with the ground, and the core structure 2 can be easily made independent. If the core structure 2 can be self-supporting, even if the metal plate 12 is deformed and peels off from the core structure 2 in the event of a fire, the core structure 2 is self-supporting, so that the partition function of the simple partition wall 1 is achieved. Can be maintained.

  The size of the first honeycomb structure 8 is not particularly limited as long as it can be loaded (stored) in the hollow portion formed by the metal plate 12 of the simple partition wall 1. For example, the length and width are about 30 cm to 90 cm. The magnitude | size of the 1st honeycomb structure 8 and the core structure 2 is suitably adjusted according to the magnitude | size of the simple partition wall 1, a use, and an installation location.

  The core structure 2 loaded in the hollow part of the simple partition wall 1 may be one or plural. By loading the core structure 2 in a part or all of the hollow portion, the heat resistance, heat insulating property and fire spread prevention performance of the simple partition wall 1 can be enhanced.

[Coating material]
As a material of the covering material 10 that covers both surfaces 8a and 8b of the first honeycomb structure 8, the heat insulating material 9 filled in the through holes 7 is prevented from flowing out to the outside, and the heat insulating material is used in normal times other than at the time of a fire. If it is the material which prevents that the free water which comprises 9 is evaporated and lost, it will not restrict | limit, For example, metal foil, resin-made sheets (film), etc. are mentioned. Of these, a resin sheet is preferable. The resin sheet is advantageous in manufacturing the core structure 2 because it is rich in flexibility, stretchability and the like and is a material that can easily cover the first honeycomb structure 8.

  The type of resin in the resin sheet is not particularly limited, but from the viewpoint of preventing free water constituting the heat insulating material 9 filled in the through hole 7 from evaporating to the outside, a resin having a low moisture permeability or moisture impermeability Preferably, it is a functional resin. Such a resin may be a thermosetting resin or a thermoplastic resin. Specific examples thereof include polyester resins such as polyethylene, polypropylene, and PET, and vinyl chloride resins.

  The thickness of the resin sheet is not particularly limited, but is preferably several μm to several hundred μm from the viewpoint of preventing the generation of pinholes and increasing the structural strength of the first honeycomb structure 8.

  The method in which the covering material 10 covers the plate surfaces (surfaces) 8a and 8b of the first honeycomb structure 8 can seal or seal the opening of the through hole 7 so that the heat insulating material 9 does not leak from the inside of the through hole 7. Or a method that can collectively seal the entire first honeycomb structure 8 is preferable. For example, the covering material 10 may be bonded to the plate surfaces 8a and 8b via an adhesive (not shown) applied to the surfaces 8a and 8b of the first honeycomb structure 8. In this case, the adhesive may be applied to the entire first honeycomb structure 8 including the heat insulating material 9 exposed on the plate surfaces 8a and 8b of the first honeycomb structure 8, or the first honeycomb structure. You may apply | coat only on the collar of the partition which comprises the plate surfaces 8a and 8b of the body 8 and which comprises the through-hole 7. FIG. The adhesive applied on the ridges of the partition walls may be applied in a continuous line shape, or may be applied in a discontinuous broken line shape or a dot shape.

  The type of the adhesive that bonds the covering material 10 and the first honeycomb structure 8 is not particularly limited, but even when receiving heat of about 45 to 1000 ° C. in the event of a fire, the adhesive bonding is difficult to undo. Agents are preferred.

  As another coating method, the plate-shaped first honeycomb structure 8 is stored in a resin bag and sealed, and the resin sheet constituting the resin bag is further bonded to the plate surface 8a of the first honeycomb structure 8. A covering method in which the plate surfaces 8a and 8b are covered by being brought into close contact with 8b can also be exemplified. In this case, the air inside the resin bag containing the first honeycomb structure 8 is removed by vacuuming, and the resin bag (resin sheet) is in close contact with the plate surfaces 8a and 8b of the first honeycomb structure 8. Can be in a state.

[Strong]
As shown in FIG. 2, the core structure 2 having a laminated structure of the fire endothermic part 3a (3) / air layer 4a (4) / fireproof heat insulating part 5 / air layer 4b (4) / fire endothermic part 3b (3). The outer periphery of is surrounded by a strength bone 11. In other words, the core structure 2 is fitted into the frame-shaped force frame 11. The strength of the laminated structure of the core structure 2 is increased by the strength bone 11.

  On each covering material 10 exposed on both surfaces 2 a and 2 b of the core structure 2 fitted in the outer frame made of the skeleton 11, a metal plate material 12 is bonded via an adhesive 13. A sandwich structure in which both surfaces 2a and 2b of the core structure 2 are sandwiched by two metal plate members 12 constitutes a main body (fire plate) of the simple partition wall 1.

  An installation foot member may be attached to the main body of the simple partition wall 1 according to the application or installation location. For the purpose of enhancing the design of the simple partition wall 1, the surface of the metal plate 12 may be painted or a decorative plate may be attached.

  The skeleton 11 constituting the substantially rectangular frame body is provided with lateral force skeletons 11a and 11b extending in the left-right direction of the vertically long simple partition wall 1 and arranged in the up-down direction, and arranged in the left-right direction extending in the up-down direction. Longitudinal force bones 11c and 11d. By joining the ends of these strength bones 11a to 11d, a substantially rectangular frame is formed. The material of the strength bone 11 is not particularly limited, and materials such as metal, wood, and resin are applicable.

[Metal plate]
The pair of metal plate members 12, 12 arranged on the front and back surfaces (main surfaces) of the simple partition wall 1 are L-shaped toward the inner side in the thickness direction of the simple partition wall 1 after the ends are folded back. The bent portion is fixed to the central piece of the shin bone 11.

  The metal material of the metal plate 12 is not particularly limited, and examples thereof include aluminum, steel, and zinc iron plate. The thickness of the metal plate material is not particularly limited, and for example, a thickness of 0.27 mm to 0.6 mm can be exemplified. The size of the metal plate material is not particularly limited, and is appropriately adjusted according to the size of the core structure.

  The type of the adhesive that bonds the metal plate 12 and the covering material 10 of the honeycomb structure 2 is not particularly limited, and a known adhesive can be applied.

[Insulation]
The heat insulating material 9 filled in the core structure 2 of the present embodiment is a porous material, a mixture of the porous material and free water, and may contain materials other than the porous material and free water. In the heat insulating material of this embodiment, free water is in a state of being included in the porous material. That is, free water is held in the porous structure of the porous material. The porous material and free water are preferably mixed uniformly.

  The porous material included in the heat insulating material is preferably a lightweight material (lightweight aggregate) having a porous structure capable of holding free water. Examples of such a porous material include pearlite, vermiculite, shirasu balloon, diatomaceous earth, and hollow glass balloon. Of these porous materials, it is more preferable to use pearlite that is excellent in retention of free water. The form of the porous material to be used is not particularly limited, but is preferably about 10 μm to 1 cm, more preferably about 10 μm to 3 mm, and still more preferably a granular or gravel shape with a particle size of about 10 μm to 1 mm. .

Although the bulk specific gravity (bulk density) (unit: g / cm ³ ) of the porous material is not particularly limited, for example, 0.035 to 0.55 is preferable, 0.040 to 0.15 is more preferable, and 0.050. -0.1 is more preferable.
When the bulk specific gravity is 0.035 or more, the structural strength of the porous material can be sufficiently maintained. On the other hand, the upper limit of the bulk specific gravity is preferably smaller from the viewpoint of retaining a large amount of free water and reducing the weight of the porous material. From this viewpoint, the upper limit of the bulk specific gravity is suitably about 0.55. If the bulk specific gravity is larger than this, the holding power or holding amount of free water may be reduced.

  The bulk specific gravity of the porous material included in the heat insulating material of the present embodiment is determined by pouring an air-dried porous material into a container of a predetermined volume based on the method of “5. Test” of JIS A5007-1977, It can be determined by measuring.

  The average particle size (particle size) of the porous material such as pearlite to be used is not particularly limited, but the average particle size is preferably 50 μm to 2000 μm, and preferably 90 μm to 90 μm from the viewpoint of improving the heat insulating property of the heat insulating material during a fire. 1000 μm is more preferable, and 200 μm to 750 μm is most preferable. If the average particle size is less than 10 μm, the particle size is too small, and the rate at which free water evaporates and diffuses due to heat generated during a fire may be too high. When the rate at which free water evaporates is too fast, the effect of suppressing the temperature rise on the non-fire surface side by the core structure using the heat insulating material of this embodiment may not be sufficient.

  The average particle size (particle size) of a granular porous material such as pearlite can be determined by sieving the particles according to JIS Z8801-1: 2006 (test sieve—Part 1: metal mesh sieve).

  Only one type of porous material may be included in the heat insulating material, or two or more types of porous materials may be included.

  Free water contained in the heat insulating material is water that is clearly distinguished from crystal water, and is water that can be diffused relatively freely in the heat insulating material. On the other hand, crystal water is water that is bonded to a crystal at a certain ratio, and is water that does not form a covalent bond with molecules or ions that form the crystal. Examples of such crystals having crystal water include salts containing metal elements such as alum described later. Crystal water does not desorb freely from the crystal and does not diffuse freely in the heat insulating material unless external energy such as heating at high temperature is applied.

  In the heat insulating material, it is preferable that at least a part of the free water is held in the porous structure of the porous material, and it is more preferable that all the free water is held in the porous structure. Since at least a part or all of the free water is held in the porous material, the heat insulating material can be easily handled. Specifically, it is easier to load the heat insulating material into the through holes 7 of the first honeycomb structure 8.

  When the free water contained in the heat insulating material of the present embodiment is heated at the time of a fire, it gradually evaporates while taking heat of vaporization from the heat insulating material. Suppress. At this time, it is important that the free water evaporates gradually. Even if excess water (excess water) that is not retained by the insulation is mixed with the insulation, the excess water will evaporate in a short time due to the heat at the time of the fire. The degree that contributes to heat insulation is less than that of free water retained in the heat insulating material.

  In addition, when the free water (excess water) which the porous material cannot hold | maintain is mixed with the heat insulating material, you may accommodate a heat insulating material and surplus water in the through-hole of a core structure.

  In the heat insulating material of the present embodiment, the content of the porous material is not particularly limited, but is preferably 60 to 85% by volume, for example, and more preferably 70 to 80% by volume. When the content of the porous material is less than 60% by volume, voids may be formed in the heat insulating material. When content of a porous material exceeds 85 volume%, the weight of a heat insulating material may become too heavy. Further, when the content of the porous material is 60% by volume or more, a sufficient amount of free water can be retained in the heat insulating material. Here, the volume of the porous material is, as described in “JIS A 5007 5.2.2” test method, the porous material is left to stand so as not to drop and to separate large and small grains. It means the volume that occupies. Therefore, it is not the true size that the constituent material of the porous material itself occupies in the space. Therefore, the amount of free water contained in the porous structure does not affect the volume of the porous material.

In the heat insulating material of the present embodiment, the content of free water with respect to 1000 cm ³ of the porous material is not particularly limited. For example, 40 g to 300 g is preferable, 40 g to 200 g is more preferable, 45 g to 100 g is further preferable, and 50 g to 75 g is preferable. Particularly preferred. When the content of free water is 40 g or more, when the heat insulating material is heated in a fire, the temperature rise can be sufficiently suppressed for 1 hour or more. When the content of the free water is 300 g or less, the free water is stably held in the porous material at normal times other than at the time of a fire, and a part of the free water is prevented from leaking from the porous material. Can do.

In the heat insulating material of the present embodiment, the content of the porous material and the content of free water are not particularly limited, but a ratio (mass (g) of the free water divided by the volume (cm ³ ) of the porous material ( g / cm ³ ) is preferably 0.04 to 0.30, more preferably 0.045 to 0.2, still more preferably 0.045 to 0.1, and 0.05 to 0.075. Particularly preferred.
When the ratio is 0.04 or more, the free water sufficiently absorbs heat at the time of fire, and the fire spread prevention performance is further improved.
When the ratio is 0.30 or less, free water is sufficiently retained in the porous material, and the handling of the heat insulating material becomes easier.

The amount of free water contained in the porous material included in the heat insulating material of the present embodiment can be measured based on “5. Test method” and “6. Calculation” of JIS A1125: 2007.
The volume of the porous material included in the heat insulating material of the present embodiment can be measured by pouring the air-dried porous material into a measuring cylinder or the like based on the method of “5. Test” of JIS A5007-1977. . One liter is converted to 1000 cm ³ .

The heat insulating material of this embodiment may include alum or mica (mica) in addition to the porous material and free water. As alum, what is represented by the chemical formula “M ^I M ^III (SO ₄ ) ₂ · 12H ₂ O” is preferable. In the above chemical formula, M ^I represents a monovalent cation, and M ^III represents a trivalent cation. Specific examples of suitable alum include potassium aluminum alum (AlK (SO ₄ ) ₂ · 12H ₂ O), iron alum, iron ammonium alum, chrome alum and the like. Of these, potassium aluminum alum is more preferred.

  Alum and mica are materials that are conventionally used as heat-resistant materials, and by adding such conventional heat-resistant materials to the heat-insulating materials of the present embodiment, the heat-resistant characteristics of the conventional heat-resistant materials have the heat-insulating materials of the present embodiment. Can be granted.

  By using alum, the heat insulating material is exposed to the heat generated during the fire and the free water evaporates, and then the crystal water in the alum is desorbed to take away the heat of vaporization. The temperature increase on the fire side can be more effectively suppressed. Since potassium aluminum alum has a large amount of water of crystallization per unit mass, it is possible to more efficiently suppress the temperature rise on the non-fire surface by using this in a heat insulating material.

  By using mica, the mica in the heat insulating material reflects the radiant heat (radiant rays) at the time of fire, and the temperature rise of the heat insulating material can be mitigated.

The average particle diameter (average size) of mica mixed in the heat insulating material of the present embodiment is preferably 0.1 mm to 10 mm, more preferably 0.5 mm to 7 mm, and most preferably 4 mm to 6 mm. When in this range, the radiant heat at the time of fire can be effectively reflected, and the temperature increase on the non-fire surface side of the core structure of the present embodiment can be more effectively suppressed.
When the average particle diameter of mica is less than 0.1 mm, the effect of reflecting the radiant heat at the time of fire is not sufficient, and conversely when mica exceeds 10 mm, mica is unevenly distributed in the heat insulating material. The effect of reflecting the radiant heat is not sufficient.

  The average particle size (average size) of the heat-reflecting material such as mica of this embodiment is determined by sieving the particles according to JIS Z8801-1: 2006 (test sieve—Part 1: metal mesh sieve). Can be obtained.

The heat insulating material of the present embodiment may include a salt containing a metal element containing crystal water (hereinafter referred to as crystal water-containing metal salt). The alum described above is classified as one of the crystal water-containing metal salts. Specific examples of such crystal water-containing metal salts include, for example, KAl (SO ₄ ) ₂ · 12H ₂ O, FeNH ₄ (SO ₄ ) ₂ · 12H ₂ O, (NH ₄ ) ₂ SO ₄ · Al ₂ ( SO _{4) 3} · 24H ₂ O, etc. _{alum, Na 2 SO 4 · 10H 2} O, MgSO 4 · 7H 2 O, ZnSO 4 · 7H 2 O, NiSO 4 · 7H 2 O, FeSO 4 · 7H 2 O, Na _{2 SO 3 · 7H 2 O,} CoSO 4 · 6H 2 O, CuSO 4 · 5H 2 O, Na 2 S 2 O 3 · 5H 2 O, CaSO 4 · 2H 2 O, FeSO 4 (NH 2) SO 4 · 6H ₂ O, sulfate such as MgSO ₄ · 5MgO · 8H ₂ O, Al ₂ (SO ₄ ) ₃ · 18H ₂ O, phosphorus such as Na ₃ PO ₄ · 12H ₂ O, Na ₄ P ₂ O ₇ · 10H ₂ O Acid salt, NaB ₄ O Borates such as ₇ · 10H ₂ O, carbonates such as Na ₂ CO ₃ · 10H ₂ O, Al (NO ₃ ) ₃ · 9H ₂ O, Zn (NO ₃ ) ₂ · 6H ₂ O, Co (NO ₃ And nitrates such as 6H ₂ O. Two or more of these salts may be used in combination.

  When the heat insulating material of the present embodiment contains a crystal water-containing metal salt, the preferable content ratio of the porous material and the crystal water-containing metal salt in the heat insulating material is, for example, 100 parts by mass of the porous material The content of the crystal water-containing metal salt is preferably 30 to 200 parts by mass, more preferably 50 to 170 parts by mass, and most preferably 110 to 150 parts by mass. In this range, when alum as a metal salt containing crystal water flows beyond the melting point when exposed to heat generated in the event of a fire, the alum is prevented from leaking from the wall, ceiling or door due to gravity. be able to. As a result, the temperature rise on the non-fire side can be more effectively suppressed. When the crystal water-containing metal salt is less than 30 parts by mass, the crystal water-containing metal salt hardly contributes to the effect of suppressing the temperature rise on the non-fire side when exposed to the heat generated at the time of fire. In the case where the amount exceeds 200 parts by mass, when the alum as the crystal water-containing metal salt is fluidized by the heat generated during the fire, the alum may leak due to the weight.

<Usage example of core structure>
As a specific use of the core structure of the present embodiment, for example, a use for loading the inside of a fire door (fire door) in the same manner as the simple partition wall described above can be cited. Specifically, for example, a configuration in which a core structure packed with a heat insulating material is loaded inside a fire door is mentioned. For example, two steel plates (thickness 0.5 mm to 1.6 mm) constitute the two main surfaces (front and back sides) of the fire door, and the thickness of the door (ie, the distance between the two steel plates) A hollow structure in which is approximately 40 mm to 80 mm. A core structure can be used as a core member packed in the hollow structure.

  Fire doors that use the core structure as a core member, when the surface side is heated in the event of a fire, the free water and crystal water that make up the internal insulation absorb the heat, evaporate from the insulation, and the insulation And since the heat of vaporization is taken from the core structure, the temperature rise of the core structure is reduced. As a result, it is difficult for the heat of the fire to be transferred to the back side of the fire door, preventing the fire from spreading to the back side of the fire door, and protecting the evacuees on the back side of the fire door from the heat of the fire. it can.

The metal partition wall loaded with the core structure of the present embodiment has fire resistance and heat insulation equivalent to a board type fire wall made of a conventional gypsum board. Since the external appearance can be made the same as that of a conventional metal partition wall, the design of the building is easy. The thickness of the metal partition wall can be, for example, about 50 mm, that is, about half of the conventional board-type fire wall. Its weight is lighter than that of a conventional board-type fire wall and can be brought close to a conventional simple metal partition wall. Therefore, instead of the conventional board-type fire wall, the effective area of the fire zone can be increased by installing a metal partition wall loaded with the core structure of the present embodiment. Moreover, it can install in the construction period shorter than the construction period of the conventional board type fire wall. The metal partition walls are thin and light, and are excellent in design, so that the degree of freedom is large in designing the arrangement in the building. For example, a plurality of metal partition walls can be finely arranged within 100 m ² . Moreover, instead of the conventional metal simple partition wall, by installing a metal partition wall loaded with the core structure of the present embodiment, it is possible to more effectively suppress the internal fire spread during a fire. In addition, the material and shape of the partition wall and fire door to which the core structure of this embodiment is loaded are not particularly limited, and the core structure of this embodiment can be easily placed inside the conventional simple metal partition wall or fire door. Can be loaded.

[Example 1]
120g of pearlite, a porous material, 160g of potassium aluminum alum, which is a metal salt containing crystallization water, and 120g of water, which is free water, are put in a polyethylene bag and mixed uniformly. The heat insulating material in a state where all water was absorbed by perlite was obtained.

Next, the heat insulating material was filled into the through holes of the paper core (first honeycomb structure) made of noncombustible paper (thickness: 0.25 mm). The size of the paper core is 300 mm long × 300 mm wide × 10 mm thick. The cross-sectional shape of the through-hole constituting the paper core is a substantially parallelogram (base: 8 cm, oblique side: 4 cm), and about 30 through-holes are arranged in parallel with the paper core. The weight of the insulation filled in the paper core was about 178 g per layer of paper core.
The paper core was wrapped in a resin bag (resin type: polyester, thickness: several μm to several hundred μm) and sealed to obtain a core structure. At this time, the resin bag was adhered to the paper core with a heat-resistant adhesive (manufactured by NICHIAS) so that the resin bag covered the opening of the through hole of the paper core, thereby producing a fire-resistant and heat-absorbing portion.

  Moreover, the heat insulation member (length 300mm x width 300mm x thickness 6mm) which packed ceramic wool with the resin-made bags was prepared. Five heat insulation members were stacked, a plurality of ceramic pieces were arranged as spacer members between the heat insulation members, and four air layers were formed to produce a refractory heat insulation part.

  The first fireproof heat absorbing part, the ceramic piece (air layer) that is the spacer member, the fireproof heat insulating part, the ceramic piece (air layer) that is the spacer member, and the second fireproof heat absorbing part are stacked in this order, and the core is placed horizontally. A structure was produced.

  Next, apply adhesive to both sides of the core structure (the bottom and top surfaces of the horizontally placed core structure), and attach 0.5 mm thick steel plates one by one to form the core structure in the hollow structure. A test body simulating a simple partition wall (fire plate) loaded with a body was prepared. Separation distance (thickness of the specimen) of the steel plate provided on the first plate surface (the lower surface of the horizontally placed specimen) and the second board surface (the upper surface of the transverse specimen) Was about 65 mm.

  A fire resistance test in which incident heat was applied for 60 minutes was performed on the second plate surface of the prepared test body (upper surface of the test specimen in the horizontal state) according to the standard heating curve defined in ISO834. FIG. 1 shows the result of monitoring the temperature change of the first plate surface (the lower surface of the horizontally placed test body) which is the non-heated surface of the test body at this time.

The result of Example 1 in FIG. 1 shows that the temperature of the lower steel plate, which is a non-heated surface, remains at about 90 ° C. even after one hour or more of incident heat has been applied to the upper steel plate. Show. It is far below the reference temperature (pre-heating temperature + 140 ° C), which is said to be a risk of fire spread.
From this result, it can be seen that the test body simulating the simple partition wall of Example 1 has sufficient heat resistance, heat insulation, and fire spread prevention performance.

[Comparative Example 1]
A test body prepared by sandwiching a conventional ceramic wool-based heat insulating material (thickness 50 mm) between two steel plates having a thickness of 0.5 mm was manufactured, and the same heat resistance test as in Example 1 was performed. The results are also shown in FIG.

  The result of Comparative Example 1 in FIG. 1 indicates that the temperature of the steel plate on the lower surface increased with increasing momentum when the incident heat was applied for 600 seconds, and exceeded the reference temperature around 1500 seconds later. . After heating for 1 hour, it has reached nearly 240 ° C.

  From the result of FIG. 1, it is clear that the simple partition wall provided with the core structure according to the present invention is superior in heat resistance, heat insulation and fire spread prevention performance than the conventional simple partition wall.

  Hereinafter, a reference example in which the heat insulating property of the heat insulating material that can be filled in the core structure of the present embodiment is described will be described.

[Reference Example 1]
120g of pearlite, a porous material, 160g of potassium aluminum alum, which is a metal salt containing crystallization water, and 120g of water, which is free water, are put in a polyethylene bag and mixed uniformly. The heat insulating material in a state where all water was absorbed by perlite was obtained. The polyethylene bag containing the heat insulating material was loaded as a core material inside a steel partition panel that was regarded as a fire door having a hollow structure.
The thickness of the two steel plates constituting the front and back surfaces of the partition panel used was 0.5 mm, and the distance between the two steel plates (panel thickness) was about 50 mm.
A fire resistance test in which incident heat was applied for 60 minutes according to a standard heating curve defined in ISO834 was performed on the front side surface of the produced partition panel. The result of monitoring the temperature change of the back surface (non-heated surface) of the partition panel at this time is shown in FIG.

The result of FIG. 4 shows that the temperature of the back surface steel plate remains at about 90 ° C. even after incident heat of 1 hour or more is applied to the front surface steel plate. It is far below the reference temperature (pre-heating temperature + 140 ° C), which is said to be a risk of fire spread.
From this result, it can be seen that the partition panel of Reference Example 1 has sufficient heat insulation and fire spread prevention performance at the time of fire.

[Reference Comparative Example 1]
A partition panel was produced in the same manner as in Reference Example 1 except that a conventional rock wool-based heat insulating material was used as the core material instead of the heat insulating material of Reference Example 1, and a fire resistance test was performed. The result is shown in FIG.

  The result of Reference Comparative Example 1 in FIG. 5 shows that when the incident heat was applied for 400 seconds, the temperature of the steel plate on the back surface gradually increased, and further increased after about 1200 seconds after heating was started. It indicates that the reference temperature was exceeded later. About 1 hour after the start of heating, the temperature reaches nearly 270 ° C.

[Reference Comparative Example 2]
Instead of the heat insulating material of Reference Example 1, 100 parts by weight of pearlite, 100 parts by weight of alum, and 30 parts by weight of mica were mixed uniformly, and the heat insulating material of Reference Comparative Example, which was a mixture prepared without using free water, A partition panel was produced in the same manner as in Reference Example 1 except that it was used as a core material, and a fire resistance test was performed. The result is shown in FIG.

  As is apparent from the results of FIGS. 3 to 6, the heat insulating material of Reference Example 1 is more excellent in fire spread prevention performance than the conventional heat insulating material.

  Furthermore, the heat insulating material which has a structure shown in the following table | surfaces was prepared, the partition panel similar to the said reference example 1 was produced, and the fireproof test was done similarly to the reference example 1. FIG. These evaluation results are also shown in Tables 1-7.

  A fire resistance test in which incident heat was applied for 60 minutes according to a standard heating curve defined in ISO834 was performed on the front side surface of the produced partition panel. In this fire resistance test, the temperature of the back surface of the partition wall (non-heated surface) is monitored, and the heat insulating material of the reference example that is higher than 140 ° C. from the reference temperature at the time of heating is poor, based on the temperature before heating, The heat insulating material of the reference example in which the rise from the reference temperature was suppressed to 140 ° C. or less was evaluated as good, and the heat insulating material in the reference example in which the increase from the reference temperature was sufficiently lower than 140 ° C. was evaluated as excellent.

  In addition, the reference example in which free water violently spilled from the heat insulating material during the fire resistance test was evaluated as bad (x), the reference example from which a little spilled out was normal (Δ), and the reference example that hardly spilled was evaluated as excellent (◯).

Each material shown in Tables 1-7 is as follows.
-Porous material types: A1 ... perlite, A2 ... vermiculite, A3 ... shirasu balloon, A4 ... diatomaceous earth, A5 ... calcium carbonate, A6 ... quartz sand / salt types: B1 ... potassium aluminum alum, B2 ... iron alum, B3 ... Ammonium iron alum, B4 ... calcium sulfate dihydrate, B5 ... aluminum phosphate, B6 ... aluminum hydroxide, B7 ... sodium acetate / type of heat reflecting material: C1 ... mica, C2 ... titanium oxide particles (average particle size: 0.28 μm), C3 ... iron powder (average particle size: 10 μm)
-Kind of container: D1 ... PVC film (thickness: 75 µm), D2 ... polyethylene film (thickness: 12 µm)

  Reference Example No. From the evaluation results of 3 to 6 and 16 to 19, it is clear that the evaluation of the fire resistance test and the evaluation of free water outflow are excellent under the condition that the average particle diameter of pearlite is 50 μm to 2000 μm.

Reference Example No. From the result of 7, it is clear that the evaluation result of the fire resistance test of the heat insulating material not containing free water is poor.
Reference Example No. From the evaluation results of 3 and 8 to 15, the ratio of the mass of free water to 1000 cm ³ of the porous material is preferably 40 g to 300 g, more preferably 45 g to 100 g, and even more preferably 50 g to 75 g.
Reference Example No. From the evaluation results of 3 and 8 to 15, the ratio of (mass of free water / volume of porous material) is preferably 0.04 to 0.30, more preferably 0.045 to 0.10, 0.05 -0.075 is more preferable.

  Reference Example No. From the evaluation results of 3 and 20 to 24, it is clear that even when vermiculite, shirasu balloon and diatomaceous earth are used as the porous material other than pearlite, the evaluation of the fire resistance test and the evaluation of free water outflow are excellent. . On the other hand, the calcium carbonate of Reference Example 23 and the silica sand of Reference Example 24 are described in the column of the porous material for convenience. However, since they are not actually porous materials, the retention capacity of free water is extremely inferior, and in the fire resistance test. I found that I lost free water in a short time.

Reference Example No. From the evaluation results of 25 to 32, the content of potassium aluminum alum, which is a salt having crystal water, with respect to 1000 cm ³ of the porous material is preferably 16 g to 110 g, more preferably 27 g to 93 g, and still more preferably 60 g to 82. Moreover, 30-200 weight part is preferable, as for content of the salt which has crystallization water with respect to 100 weight part of porous materials, 50-170 weight part is more preferable, and 110-150 weight part is further more preferable.
When there is too little content of the salt which has crystal water, the heat insulation after heating for a long time and losing free water will be inferior. On the other hand, when there was too much content of the salt which has crystallization water, it flowed out from the heat insulating material by increasing the fluidity | liquidity of the salt which has crystallization water during a fireproof test, and it turned out that heat insulation is inferior.

  Reference Example No. From the evaluation results of 3 and 33 to 38, even when iron alum, ammonium iron alum, sulfate, and phosphate are used as salts having crystal water other than potassium aluminum alum, evaluation of fire resistance test and free water outflow It is clear that the evaluation of is excellent or good. On the other hand, the aluminum hydroxide of Reference Example 37 and the sodium acetate of Reference Example 38 are salts that do not have water of crystallization, so they hardly contribute to the improvement of heat insulation in the event of fire, but rather free water is a heat insulating material. It turns out that it will promote the outflow.

Reference Example No. From the evaluation results of 3 and 39 to 44, the content of mica, which is a heat reflecting material, with respect to 1000 cm ³ of the porous material is preferably 10 g to 60 g, and more preferably 15 g to 30 g.
If the content of mica, which is a heat reflecting material, is too small, the degree of reflection of radiant heat entering the heat insulating material is small, so it is considered that the heat insulating property during a fire is inferior. On the other hand, when there was too much content of mica which is a heat reflecting material, it turned out that the heat insulation at the time of a fire is inferior. It is unclear why too much heat-reflecting material reduces the heat insulation during a fire, but too much heat-reflecting material, mica, functions as a heat conductor from the heated surface to the back of the partition panel. This is speculated as one of the reasons.

Reference Example No. 3 and no. From the evaluation result of 45-51, 0.1-20 mm is preferable, as for the magnitude | size of the mica which is a heat | fever reflecting material, 0.5 mm-15 mm is more preferable, 1.0 mm-10 mm is further more preferable.
If the size of the heat-reflecting material is too small, the degree of reflection of the radiant heat entering the heat-insulating material is small, so it is considered that the heat-insulating property at the time of fire is poor. On the other hand, even when the heat reflecting material was about 15 mm in size, the evaluation was the same as in the case of about 6 mm.

  The average particle diameter of mica, which is a heat reflecting material used in this test, can be determined by sieving particles according to JIS Z8801-1: 2006 (test sieve—Part 1: metal mesh sieve).

  Reference Example No. No. 52 titanium oxide particles and Reference Example No. Under the conditions using 53 iron powder as a heat reflecting material, the fire resistance test was poorly evaluated. From this result, it is understood that mica is excellent as a heat reflecting material.

Reference Example No. 3 and Reference Example No. From the evaluation results of 54 to 60, the surface area (cm ² / cm ³ ) per unit volume of the container is preferably 0.05 to 2.0, more preferably 0.01 to 1.5, and 0.6 to 1.1 is more preferable. If the surface area is larger than 2.0, it is clear that free water flows out during the fire resistance test and the heat insulation during the fire is poor.
In this test, the size of the surface area of each reference example was adjusted by changing the size of the bag as the container.

  Reference Example No. From the evaluation result of 61, it is clear that the evaluation of the fire resistance test and the evaluation of the free water outflow are excellent even when the container made of polyethylene sheet is used as the material of the container other than the vinyl chloride sheet. is there.

  Reference Example No. Based on the evaluation results of 62, in the configuration in which only the free water is filled in the bag as the container without using the porous material, almost all of the free water flows out and evaporates from the container by heating in the initial stage of the fire resistance test. Therefore, the evaluation of the fire resistance test and the evaluation of free water outflow were inferior.

  The configurations and combinations thereof in the embodiments described above are examples, and the addition, omission, replacement, and other modifications of the configurations can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Simple partition wall 2 ... Core structure 2a ... One board surface (1st board surface) of a core structure
2b ... The other plate surface of the core structure (second plate surface)
3, 3a to 3b ... fire endothermic part 4, 4a to 4e ... air layer 5 ... fire resistant heat insulating part 6a to 6e ... heat insulating member 7 ... through hole 8 ... first honeycomb structure 8a ... one plate of the first honeycomb structure Surface (first plate surface)
8b ... the other plate surface of the first honeycomb structure (second plate surface)
DESCRIPTION OF SYMBOLS 9 ... Heat insulating material 10 ... Coating | covering material 11, 11a-11d ... Strength 12 ... Metal plate material 13 ... Adhesive agent

Claims (11)

A plate-like core structure,
From the first plate surface of the core structure toward the second plate surface,
Each part is arranged in the order of fire endothermic part / air layer / fire insulating part / air layer / fire endotherm,
The fireproof heat insulating part has a heat insulating member containing inorganic fibers,
The refractory endothermic part is
A plate-like first honeycomb structure in which a plurality of through holes are arranged side by side across a partition;
A heat insulating material filled in the plurality of through-holes and containing a porous material and free water;
A covering material covering both plate surfaces of the first honeycomb structure;
A core structure characterized by comprising:   2. The core structure according to claim 1, wherein the fireproof heat insulating portion includes a repeated structure in which the respective members are arranged in the order of the heat insulating member / the air layer / the heat insulating member.   The core structure according to claim 2, wherein four or more layers of the air layer are arranged in the fireproof heat insulating portion. The fireproof heat insulating part is provided with a plate-like second honeycomb structure,
The core structure according to any one of claims 1 to 3, wherein the heat insulating member is filled in a plurality of through holes constituting the second honeycomb structure.   The heat reflecting film made of an inorganic material or a metal is disposed on the covering material on at least one plate surface of the first honeycomb structure, according to any one of claims 1 to 4. The core structure described.   The core structure according to claim 4, wherein a heat reflecting film made of an inorganic material or a metal is disposed on at least one plate surface of the second honeycomb structure.   The core structure according to any one of claims 1 to 6, wherein a plate-like third honeycomb structure or a spacer member is disposed in the air layer.   The core structure according to any one of claims 1 to 7, wherein the free water is held in the porous material.   The core structure according to any one of claims 1 to 8, wherein the heat insulating material includes alum or mica. A ratio (g / cm ³ ) obtained by dividing the mass (g) of the free water by the volume (cm ³ ) of the porous material in the heat insulating material is 0.04 to 0.30. The core structure as described in any one of Claims 1-9. A simple partition wall comprising the core structure according to any one of claims 1 to 10 inside.

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