JP3115936B2 - Non-combustible honeycomb structural material, method for producing the same, and non-combustible board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention has heat resistance and nonflammability,
The present invention relates to a non-combustible honeycomb structural material which is lightweight and high-strength and is used as a structural material for an aircraft or the like, a building material for an interior panel of a railway vehicle, an inner and outer wall for a building, etc.

[0002]

2. Description of the Related Art Conventionally, a paper honeycomb formed of thick paper as a honeycomb has been widely used as a structural material which is lightweight, has a certain strength, and is easy to handle.

However, this paper honeycomb is easily burned due to its paper quality, and is not suitable for a place requiring high rigidity.

Further, Japanese Utility Model Laid-Open No. 2-87646 discloses that
Although a technology in which a honeycomb is formed by laminating paper and metal foil is described, it is impossible to apply it to a place where nonflammability is required because some of the components are paper.

[0005] Therefore, a honeycomb core formed by laminating metal foils such as aluminum and stainless steel is usually used as a structural material in places where it is lightweight, nonflammable, and requires high rigidity.

[0006] Honeycomb structural materials using these metal foils are used for various structural materials such as aircraft, railway vehicles, and building materials because of their high rigidity due to their shape characteristics despite their light weight.

[0007]

However, a conventional honeycomb structural member made of metal foil is, for example, about 40% in the case of a generally used aluminum honeycomb structural member.
Since the softening starts at an atmosphere temperature of 0 ° C., the predetermined shape cannot be maintained at a higher temperature, and the place of use is restricted.

[0008] Further, it is very expensive compared to paper honeycomb.

Accordingly, the present invention provides a non-combustible honeycomb structural material which is used in combination with a metal foil, has non-combustibility, can maintain a predetermined shape even under high temperature use, and can be manufactured at low cost, and a method for producing the same. The purpose is to provide a sex board.

[0010]

According to the present invention, there is provided a non-combustible honeycomb structural material comprising a plurality of laminated sheets formed by bonding a metal foil and a non-combustible sheet via an adhesive, and using an adhesive between layers. In a honeycomb shape.

In another aspect of the present invention, there is provided a method for manufacturing a non-combustible honeycomb structural material, comprising the steps of: bonding a metal foil and a non-combustible sheet via an adhesive; An application step of applying the agent in a linear manner at a constant interval and a constant width, and laminating a plurality of laminate sheets in which the adhesive is applied in a linear form, with the application positions being different from each other by a half pitch. A crimping step of crimping, a cutting step of cutting the laminate formed in the laminating step to a fixed width, and a stretching step of forming the honeycomb core formed in both directions by cutting the cut laminated body cut to a fixed width. It consists of:

Further, the non-combustible board according to the present invention is obtained by laminating a non-combustible sheet formed of a slurry containing fibrous magnesium hydroxide as a main component in a honeycomb shape using an inorganic adhesive between layers. From a non-combustible honeycomb structure material, and a non-combustible plate material formed by forming a slurry containing fibrous magnesium hydroxide as a main component and affixed to both surfaces of the non-combustible honeycomb structure material via an inorganic adhesive. Become.

[0013]

According to the non-combustible honeycomb structure of the present invention, the shape of the non-combustible sheet can be maintained even at a high temperature.
Even if the metal foil softens due to high temperatures, it reinforces it and the honeycomb core retains its shape as a whole.

Further, since the metal foil and the non-combustible sheet constituting the honeycomb core are both inorganic and non-combustible, they can be used in flammable places.

Further, by using an inexpensive noncombustible sheet, the cost is lower than that of a honeycomb core having the same strength and entirely made of metal foil.

Then, a laminated sheet can be manufactured at low cost and high quality by a simple continuous process including a laminating process, a coating process, a lamination pressing process, a cutting process, and a stretching process.

Further, in the non-combustible board of the present invention,
Since it is composed entirely of fibrous magnesium hydroxide, it acts in the same manner as the non-combustible honeycomb structure material, and since a non-combustible plate material is adhered to both surfaces, it is resistant to a compressive load from the lateral direction. Even with high strength. Furthermore, when a surface material such as a steel plate is adhered to the side surface of the board, the entire surface of the non-combustible plate becomes a bonding surface, so that the bonding strength is greater than when the surface material is directly bonded to the non-combustible honeycomb structure material. .

[0018]

【Example】

<First Embodiment> A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a non-combustible honeycomb structural member according to a first embodiment of the present invention.

In the figure, 1 denotes a film thickness of 20 to 100 μm
It is a laminate sheet formed by laminating and joining an aluminum foil 2 having a thickness of about 1 and a non-combustible sheet 3 having a paper thickness of about 0.1 to 1.0 mm with a sheet-forming inorganic adhesive 4. The non-combustible sheet 3 is a non-combustible paper made mainly of natural fibrous magnesium hydroxide (mineral name: BRUCITE) formed by a production method described below, while the sheet-forming inorganic adhesive 4 is A water-soluble or water-dispersed type is used. For example, various heat-resistant inorganic agents such as a combination of potassium silicate and antimony pentoxide can be used.

Reference numeral 24 denotes a honeycomb core having a constant width formed by laminating a plurality of the laminate sheets 1 using an inorganic adhesive 5 for forming a honeycomb made of an inorganic agent and forming the laminate. The honeycomb-forming inorganic adhesive 5 is an inorganic adhesive,
It is linearly applied to the surface of the laminate sheet 1 by screen transfer. As the inorganic adhesive 5 for forming a honeycomb, an optimal material is selected in consideration of a heat resistance temperature, an application workability, a drying speed, an adhesive strength, and the like, similarly to the inorganic adhesive 4 for forming a sheet.

Next, FIG. 2 shows a method of manufacturing the laminated sheet 1 having the above configuration.

FIG. 2 is a schematic process diagram showing a method for manufacturing a laminate sheet according to the first embodiment of the present invention.

The figure shows a processing method called wet lamination, 11 is an aluminum foil feeding bobbin for feeding the aluminum foil 2 to the crimping joint, and 12 is the aluminum foil 2 fed from the aluminum foil feeding bobbin 11. Is an application roller for applying the sheet-forming inorganic adhesive 4 of the adhesive tank 13 to one surface of the adhesive tank 13; Reference numeral 15 denotes a pair of upper and lower pressure rollers for pressing and bonding the aluminum foil 2 fed from the aluminum foil feeding roller 11 and the non-combustible sheet 3 fed from the non-combustible sheet feeding bobbin 14, 16 denotes a drying furnace, and 17 denotes a drying furnace. A winding bobbin 17 for winding the laminated sheet 1 dried and solidified in the drying furnace 16.

In order to manufacture the laminated sheet 1 by the above-mentioned apparatus, first, the aluminum foil 2 is fed out from the aluminum foil feeding bobbin 11 at a predetermined speed, and then the aluminum foil 2 is passed through the coating roller 12. The sheet-forming inorganic adhesive 4 is applied to the entire surface of the aluminum foil 2 at a uniform thickness. The aluminum foil 2 coated with the sheet-forming inorganic adhesive 4 is fed to the pressure roller 15 while maintaining the wet state because the sheet-forming inorganic adhesive 4 is of a water-soluble or water-dispersible type. At the same time, the non-combustible sheet 3 is fed from the non-combustible sheet feeding bobbin 14 in synchronization with the feeding speed of the aluminum foil 2 fed from the aluminum foil feeding bobbin 11.

Next, the aluminum foil 2 and the non-combustible sheet 3 fed from the aluminum foil feeding bobbin 11 and the non-combustible sheet feeding bobbin 14, respectively, are inserted between a pair of upper and lower pressure rollers 15 and these are inserted. The layers are pressed together from above and below to form a laminated state. Next, the aluminum foil 2 and the non-combustible sheet 3 formed in a laminated state are guided into a drying furnace 16 and heated at a predetermined temperature for a predetermined time, so that moisture in the inside is scattered between the particles of the non-combustible sheet 3 and dried. Let it solidify. Then, after leaving the drying furnace 16, it is cooled, cut into a certain width, and wound on a winding bobbin 17.

The laminated sheet 1 obtained by laminating the aluminum foil 2 and the non-combustible sheet 3 by using the sheet-forming inorganic adhesive 4 by the laminating process constituted as described above.
Is completed.

Even if the laminated sheet 1 is folded at this stage, the aluminum foil 2 is held by the viscoelastic non-combustible sheet 3 and tears occur as in the case where the aluminum foil 2 is folded alone. Nothing.

Next, a process of manufacturing the honeycomb core 24 from the laminate sheet 1 formed in the above-described laminating process will be described.

FIG. 3 is an explanatory view showing a manufacturing process of the noncombustible honeycomb structural member according to the first embodiment of the present invention.

First, the laminated sheet 1 wound around the take-up bobbin 17 in (a) is cut into a fixed width to obtain a cut sheet 21 in (b). Next, the process proceeds to an application step, in which the inorganic adhesive 5 for forming a honeycomb is linearly applied to the surface of the cut sheet 21 by screen transfer or roller application at a constant interval and a constant width. At this time, if the applied amount of the honeycomb-forming inorganic adhesive 5 is large, it flows sideways and the line is disturbed, and if it is small, poor adhesion occurs. Therefore, it is necessary to appropriately select a thickener, a screen mesh, and the like. There is. This honeycomb-forming inorganic adhesive 5 is applied to another laminated sheet 1
Is performed similarly. Here, the position where the honeycomb-forming inorganic adhesive 5 is applied in a linear manner is a position where a plurality of laminated sheets 1 are stacked and the adjacent laminated sheets 1 are alternately shifted by a half pitch. The width of the honeycomb-formed inorganic adhesive 5 applied linearly is the length of the overlapped surface of the cells of the honeycomb core 24 after completion, and the width of the honeycomb-formed inorganic adhesive 5 varies. Thus, the cell size of the honeycomb core 24 changes.

After the honeycomb-forming inorganic adhesive 5 is applied at regular intervals, in the laminating and pressing step (c), a plurality of coated laminated sheets 1 are laminated, and bonded by pressing from above and below in a linear manner. To form a sheet block 22 on which the honeycomb-forming inorganic adhesives 5 are alternately shifted by a half pitch.

Thereafter, in the cutting step (d), the sheet block 22 is cut to the width of the finished product to form a cut sheet block 23.

Then, in the expanding step (e), the honeycomb core 24 is completed by expanding the cut sheet blocks 23 from both sides.

Next, an example of manufacturing the non-combustible sheet 3 constituting the honeycomb core 24 will be described with reference to FIG.

In this embodiment, the non-combustible sheet 3 is
Natural fibrous magnesium hydroxide (mineral name BRUCI
TE) was used as a main material, and a polymer binder and glass fiber were added thereto to form a slurry, followed by papermaking.

Hereinafter, the manufacturing process of the non-combustible sheet 3 in this embodiment will be described.

FIG. 4 is an explanatory view showing an outline of the manufacturing process of the noncombustible sheet constituting the noncombustible laminate sheet of the first embodiment of the present invention.

In the fibrillation step A, natural fibrous magnesium hydroxide as a main raw material, glass fiber, wood pulp and synthetic fiber as reinforcing materials are put into a fibrillator and fibrillated by stirring. Improve the dispersion of the fibers.

Next, in the raw material mixing step B, the defibrated paper stock, polymer binder, softener, stabilizer and the like are put into a mixing tank and mixed to produce a slurry. As the polymer binder used here, a thermosetting resin was used in order to satisfy the requirements of structural strength and water resistance, and further, a thermoplastic resin was used.

The slurry mixed in the raw material mixing step B is
In order to perform a coagulation treatment suitable for papermaking, convergence is performed by a convergence reaction device in processing step C. The slurry prepared in the processing step C is sent out to a stock tank, and enters a storage step D in which the mixed state is always kept uniform so that sedimentation or collapse of the prepared sheet does not occur.

Then, the slurry in the accumulation step D is pumped up to a constant-quantity hopper by a constant-quantity pump, and guided to the papermaking step E.

In the paper making step E of this embodiment, paper was made using a round-mesh paper machine. At this time, the slurry concentration was 0.05
０．５0.5%, and the paper machine used a 60-80 mesh netting machine.

The wet sheet obtained by dewatering the slurry in the paper making step E is conveyed into a drying furnace in a drying step F, and is dried at a required temperature for a predetermined time to evaporate the internal moisture and react with the binder. Promotes drying and solidification.

Thus, the non-combustible sheet 3 having a paper thickness of 0.1 to 1.0 mm is completed. The non-combustible sheet 3 has high heat resistance, and can maintain a predetermined shape only by slight smoke and blackening even when a fire is approached.

As described above, the non-combustible honeycomb structural member of the above embodiment is obtained by bonding a plurality of laminated sheets 1 formed by joining the aluminum foil 2 and the non-combustible sheet 3 with the sheet-forming inorganic adhesive 4 interposed therebetween. The honeycomb core 24 is laminated in a honeycomb shape using a honeycomb forming machine adhesive 5.

Therefore, according to the above embodiment, since the shape of the non-combustible sheet 4 can be maintained even at a high temperature, the aluminum foil 2 is prevented from melting and flowing out in an atmosphere of about 600 ° C. The honeycomb core 24 can be prevented by the high-temperature strength, and the overall shape of the honeycomb core 24 can be maintained. For this reason, the conventional aluminum honeycomb having the aluminum foil 2 alone can be used only at a relatively low temperature, but the operating temperature can be set higher.

The aluminum foil 2, non-combustible sheet 3, sheet-forming inorganic adhesive 4, and honeycomb forming machine adhesive 5 are all inorganic and non-flammable, so that they can be used in flammable places. It is.

Further, by using the inexpensive noncombustible sheet 3, the aluminum foil 2 can be saved correspondingly, and the cost is lower than that of an aluminum honeycomb core of the same strength, which is entirely made of the aluminum foil 2.

In addition, since the honeycomb core 24 uses the inorganic adhesive 4 for forming a sheet and the inorganic adhesive 5 for forming a honeycomb having high-temperature characteristics, when the honeycomb core 24 is exposed to a high temperature, the honeycomb core 24 becomes incombustible with the aluminum foil 2. There is no peeling between the conductive sheet 3 and the laminate sheet 1.

The manufacturing method of the laminated sheet according to the above embodiment includes a laminating step of bonding the aluminum foil 2 and the non-combustible sheet 3 via the sheet-forming inorganic adhesive 4, and a laminating step bonded in the laminating step. An application step of linearly applying the honeycomb-forming inorganic adhesive 5 to the sheet 1 at a constant interval and a constant width, and a plurality of cut sheets 21 in which the inorganic adhesive is applied linearly, A laminating and crimping step of laminating and crimping in a state different by half pitch, a cutting step of cutting the sheet block 22 formed in the laminating and crimping step to a fixed width, and a cutting sheet block 23 cut to a fixed width. And a developing step of forming the honeycomb core 24 in both directions.

Therefore, the honeycomb core 24 can be manufactured at low cost and with high quality by the simple continuous process described above.

The honeycomb core 24 is lightweight, high-strength, and has excellent heat resistance and non-combustibility, so that it can be used for structural materials such as aircraft, building panels such as interior panels for railway vehicles and inner and outer walls for buildings. It can be used widely.

Next, a non-combustible honeycomb structural member according to another embodiment of the present invention will be described with reference to FIG.

FIG. 5 is a perspective view showing a non-combustible honeycomb structural member according to another embodiment of the present invention. In the figures, FIGS. 1 to 3
The same reference numerals denote the same or corresponding parts as those of the embodiment.

In the figure, reference numeral 24 denotes a honeycomb core having a constant width formed by laminating a plurality of laminate sheets 1 using the inorganic adhesive 5 for forming a honeycomb and expanding the same, as in the above embodiment. Reference numeral 6 denotes a filler made of a heat insulating material or the like filled in the gaps of the honeycomb core 24.

The honeycomb core 24 in which the filler 6 is filled in the voids, when the filler 6 is made of glass wool or rock wool or is made of a heat insulating material mixed with a foaming agent, has the above-mentioned light weight. In addition to high strength, heat resistance, and non-combustibility, the heat insulation effect can be enhanced, and sound absorbing properties can be imparted.

<Second Embodiment> Next, a non-combustible board according to a second embodiment of the present invention will be described with reference to FIG.

FIG. 6 is a sectional view showing a non-combustible board according to a second embodiment of the present invention. In the drawings, the same reference numerals as those in FIGS. 1 to 5 denote the same or corresponding parts as those in the first embodiment.

In the figure, reference numeral 24 designates a fixed width formed by laminating a plurality of the same non-combustible sheets 3 as in the first embodiment using the honeycomb-forming inorganic adhesive 5 as in the first embodiment, and forming the same. It is a honeycomb core.

Reference numeral 31 denotes a non-combustible board formed by adhering non-combustible plate members 32 to both sides of the honeycomb core 24. The non-combustible sheet 32 is made of a slurry containing fibrous magnesium hydroxide as a main component, and is made of the same material as the non-combustible sheet 3, and is made considerably thicker than the non-combustible sheet 3. . Reference numeral 33 denotes a board-forming inorganic adhesive which is applied to both end surfaces of the honeycomb core 24 by means such as roller application and joins the honeycomb core 24 and the noncombustible plate 32. Various inorganic adhesives can be used as the board-forming inorganic adhesive 33, and the same material as the honeycomb core-forming inorganic adhesive 5 is preferable.

The non-combustible board 31 of the second embodiment constructed as described above is made of fibrous magnesium hydroxide as a whole, so that it operates in the same manner as the first embodiment. Since the nonflammable plate 32 is adhered to both sides, it has high strength against a compressive load from the lateral direction. Furthermore, when a surface material such as a steel plate is adhered to the side surface of the non-combustible board 31, the entirety of one surface of the non-combustible plate 32 becomes a bonding surface, so that the bonding strength is higher than when the surface material is directly bonded to the honeycomb core 24. Can be increased.

In each of the above embodiments, the aluminum foil 2 is used as the metal foil. However, the present invention is not limited to this.
Various metal foils such as a stainless steel foil and a copper foil can be similarly used.

In each of the above embodiments, the non-combustible sheet 3
Although a slurry obtained by paper-making a slurry containing natural fibrous magnesium hydroxide as a main component is used as the material, the present invention is not limited to this. Magnesium hydroxide. Further, sepiolite may be added to the non-combustible sheet 3. Sepiolite is a clay mineral commonly referred to as mountain leather and has adsorptive properties, thixotropic properties, and solidifying properties. The above properties can be imparted by adding sepiolite.

In addition, the inorganic adhesive 4 for forming a sheet or the inorganic adhesive 5 for forming a honeycomb in the above embodiment can be selected from various inorganic agents suitable for the use temperature.
In each of the above embodiments, an inorganic adhesive is used as the adhesive, but an organic adhesive such as a vinyl acetate adhesive may be used depending on the application. When an organic adhesive is used, coating workability is improved.

Further, in the production of the laminate sheet 1 of the above embodiment, an example using a wet lamination processing method is shown. However, when the present invention is practiced, other methods such as thermal lamination, hot melt lamination, and non- Various processing methods such as solvent lamination and dry lamination can also be used.

In addition, the laminate sheet 1 of the above embodiment
Indicates a two-layer structure of the aluminum foil 2 and the non-combustible sheet 3, but the metal foil and the non-combustible sheet 3 are appropriately combined to form a three-layer structure.
It is also possible to have more than layers.

[0068]

As described above, the non-combustible honeycomb structural material of the present invention comprises a plurality of laminated sheets formed by joining a metal foil and a non-combustible sheet via an adhesive, using an adhesive between layers. In a honeycomb shape. Therefore, since the shape of the non-combustible sheet can be maintained even at high temperatures, the shape of the honeycomb core as a whole can be maintained, and the operating temperature can be set higher than that of a single metal foil. Since the non-combustible sheet and each adhesive are inorganic and non-combustible, they can be used in flammable places. Furthermore, by using an inexpensive noncombustible sheet, the cost is lower than that of a honeycomb core having the same strength, all of which is made of metal foil.

Further, the method for producing a noncombustible honeycomb structural material of the present invention comprises a laminating step of joining a metal foil and a noncombustible sheet via an adhesive, and an adhesive applied to the laminated sheet joined in the laminating step. An application step of applying the adhesive linearly at a constant interval and a constant width, and laminating and bonding a plurality of laminated sheets in which the adhesive is applied linearly with the application positions being different from each other by a half pitch A laminating and pressing step, a cutting step of cutting the laminate formed in the laminating and pressing step to a fixed width, and a stretching step of expanding the cut laminated body cut to a constant width in both directions to form a honeycomb core. Things. Therefore, the noncombustible honeycomb structural material can be manufactured at low cost and with high quality by the above simple continuous process.

Further, the non-combustible board according to the present invention is obtained by laminating a non-combustible sheet obtained by forming a slurry containing fibrous magnesium hydroxide as a main component into a honeycomb shape using an inorganic adhesive between layers. From a non-combustible honeycomb structure material, and a non-combustible plate material formed by slurrying a slurry containing fibrous magnesium hydroxide as a main component and affixed to both surfaces of the non-combustible honeycomb structure material via an inorganic adhesive. Become. Therefore, since it is composed entirely of fibrous magnesium hydroxide, it has the same effect as the non-combustible honeycomb structure material, and since the non-combustible plate material is attached to both surfaces,
It has high strength against compressive loads from the lateral direction. Furthermore, when a surface material such as a steel plate is attached to the side of the board,
Since the entire surface of the non-combustible plate material is the bonding surface, the bonding strength can be increased as compared with the case where the surface material is directly bonded to the non-combustible honeycomb structure material.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a non-combustible honeycomb structural member according to a first embodiment of the present invention.

FIG. 2 is a schematic process diagram showing a method of manufacturing a laminate sheet according to a first embodiment of the present invention.

FIG. 3 is an explanatory view showing a manufacturing process of the noncombustible honeycomb structural member according to the first embodiment of the present invention.

FIG. 4 is an explanatory view schematically showing a manufacturing process of a non-combustible sheet constituting the non-combustible laminate sheet of the first embodiment of the present invention.

FIG. 5 is a perspective view showing a non-combustible honeycomb structural member according to another embodiment of the present invention.

FIG. 6 is a sectional view showing a non-combustible board according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Laminated sheet 2 Aluminum foil 3 Non-combustible sheet 4 Inorganic adhesive for sheet formation 5 Inorganic adhesive for honeycomb formation 6 Filler 24 Honeycomb core 31 Non-combustible board 32 Non-combustible plate

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kyoichi Fujimoto 65, Kakamigahara City Metal Complex, Gifu Prefecture Tokiwa Denki Co., Ltd. (58) Field surveyed (Int. Cl. ⁷ , DB name) E04C 2/00-2 / 54 B32B 1/00-35/00

Claims (10)

(57) [Claims] 1. A non-combustible honeycomb structure comprising: a plurality of laminated sheets in which a metal foil and a non-combustible sheet are bonded via an adhesive; Wood. 2. A honeycomb core in which a plurality of laminated sheets formed by bonding a metal foil and a non-combustible sheet via an adhesive are laminated in a honeycomb shape using an adhesive between layers, and a gap between the honeycomb cores. A non-combustible honeycomb structural material, comprising: 3. The non-combustible honeycomb structure according to claim 1, wherein the non-combustible sheet is formed by making a slurry containing fibrous magnesium hydroxide as a main component. 4. The sheet according to claim 1, wherein the non-combustible sheet is formed by making a slurry containing fibrous magnesium hydroxide and sepiolite as main components.
3. The non-combustible honeycomb structural material according to item 1. 5. A laminating step of joining a metal foil and a non-combustible sheet via an adhesive, and a coating step of applying an adhesive linearly at a constant interval and a constant width to the laminated sheet joined in the laminating step. A plurality of laminated sheets to which the adhesive has been applied in a linear shape, and a laminating and crimping step of laminating and crimping the laminated sheets in a state where their application positions are different from each other by a half pitch, and A cutting step of cutting the laminate to a constant width, and expanding the cut laminate to a constant width in both directions;
A method for producing a non-combustible honeycomb structural material, comprising: a step of forming a honeycomb core. 6. A laminating step of joining a metal foil and a non-combustible sheet via an adhesive, and a coating step of applying an adhesive linearly at a constant interval and a constant width to the laminated sheet joined in the laminating step. A plurality of laminated sheets to which the adhesive has been applied in a linear shape, and a laminating and crimping step of laminating and crimping the laminated sheets in a state where their application positions are different from each other by a half pitch, and A cutting step of cutting the laminate to a constant width, and expanding the cut laminate to a constant width in both directions;
A method for manufacturing a non-combustible honeycomb structural material, comprising: a stretching step of forming a honeycomb core; and a filling step of filling a gap in the honeycomb with a filler. 7. The non-combustible honeycomb structure material according to claim 5, wherein the non-combustible sheet is formed by paper-making a slurry containing fibrous magnesium hydroxide as a main component. Method. 8. The non-combustible sheet is formed by making a slurry containing fibrous magnesium hydroxide and sepiolite as main components.
3. The method for producing a non-combustible honeycomb structural material according to item 1. 9. A non-combustible honeycomb structural material obtained by laminating a non-combustible sheet obtained by paper-making a slurry containing fibrous magnesium hydroxide as a main component using an adhesive between layers, A non-combustible board, comprising: forming a slurry mainly containing magnesium hydroxide in a state of shape, and comprising a non-combustible plate material adhered to both surfaces of the non-combustible honeycomb structure material via an adhesive. . 10. A non-combustible honeycomb structural material obtained by laminating a non-combustible sheet obtained by forming a slurry containing fibrous magnesium hydroxide and sepiolite as main components using an adhesive between layers. And a non-combustible plate material obtained by paper-making a slurry containing fibrous magnesium hydroxide and sepiolite as main components, and attached to both surfaces of the non-combustible honeycomb structural material via an adhesive. Incombustible board.