JPH0957880A - Fireproof laminated panel - Google Patents

Abstract

(57) [PROBLEMS] To provide a fire-resistant laminated panel which has excellent fire resistance and fire resistance, is lightweight, and has high strength. SOLUTION: A core 1 made of a honeycomb structure material formed of non-combustible paper containing sepiolite as a main component and a core 1 are integrally joined in a state in which front end portions of the core 1 are embedded in both side surfaces, An inorganic filler mainly composed of an inorganic hollow body such as shirasu balloon, an inorganic filler layer 2 formed from an inorganic binder such as water glass or colloidal silica, and the surface of each inorganic filler layer 2 are bonded to each other. And a steel plate 3. It is also possible to omit one of the inorganic filling layers 2 and form a similar refractory laminated panel. By providing the inorganic filling layer 2, a fire-resistant laminated panel having high rigidity and high strength can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire-resistant laminated panel which is preferably used as a building material for outer walls, doors, partitions, etc., and particularly has complete noncombustibility and excellent fire resistance.
The present invention relates to a lightweight and high-strength fireproof laminated panel.

[0002]

2. Description of the Related Art Conventionally, for building materials such as doors, partitions, and outer walls, a laminated panel consisting of a core made of a honeycomb structure and surface materials such as steel plates joined to both sides thereof for weight reduction and the like, That is, sandwich panels are widely used.

And, as such a laminated panel,
A core made of a honeycomb structure material is formed from a paper material such as kraft paper, a colored zinc-plated steel plate or the like is used as the surface material, and the core and the surface material are bonded with an adhesive such as a phenol resin or an epoxy resin. Is common. Such a laminated panel has an advantage that it is inexpensive and easy to handle and has relatively high strength, as compared with one using a metal honeycomb structure material. However, since the core material is pulpy, it has the drawback that it burns easily.
Therefore, there is a problem that it is unsuitable for applications or places where fire resistance and fire resistance are required.

Therefore, various means for making such a laminated panel flame-retardant and improving fire resistance have been developed and proposed in the past. One well-known method is
Filling the core made of honeycomb structure with an inorganic filler. And according to this, sound insulation, heat insulation, mechanical strength, etc. can also be improved. On the other hand, it is also possible to use a flame-retardant paper made from a mixture of aluminum hydroxide and pulp as a material for forming the honeycomb structure, for example, JP-A-60-250945 and JP-A-63-178.
It is proposed in Japanese Patent Publication No. 033.

Further, for example, in Japanese Patent Application Laid-Open No. 2-57329, a honeycomb core is formed from such a flame-retardant paper coated with sodium silicate, and sodium silicate is used as a binder inside the core. There is disclosed a laminated panel in which an inorganic filler is filled, and metal plates are adhered to both surfaces of the core by an adhesive composed of sodium silicate.

[0006]

However, although these prior arts relating to laminated panels certainly achieve the object of flame retardancy, they are still insufficient in terms of noncombustibility and high temperature durability. there were. That is, the pulp core material is flammable, and the resin binder such as a phenol resin used as a binder for the inorganic filler burns or decomposes at high temperatures. In this respect, in the one disclosed in the above-mentioned JP-A-2-57329, non-combustible sodium silicate, that is, water glass is used as the binder, and flame-retardant paper is further used as the core material. Moreover, its surface is coated with water glass. However, even in this case, since the flame-retardant paper contains about 30% of pulp for improving the bending strength, there is a problem that it is thermally decomposed at high temperature and its shape retention property is lost. .

Further, one of the other important problems of these conventional laminated panels is that they have a relatively low strength against bending. That is, the honeycomb structure material forming the core has high strength in the thickness direction, but relatively weak strength in the bending direction. Therefore, when a large laminated panel is formed, the strength against bending tends to be insufficient. However, the strength against bending is the same as that disclosed in JP-A-2-57329.
It can be enhanced by filling the inside of the core material with an inorganic filler. However, in such a case, although high strength is obtained, the weight of the entire laminated panel is increased accordingly, and the characteristics of the sandwich panel, which is characterized by being lightweight, are impaired.

[0008] Therefore, it is an object of the present invention to provide a fireproof laminated panel which is excellent in fireproofing and fireproofing, is lightweight and has high strength.

[0009]

A refractory laminated panel according to a first aspect of the present invention comprises a core made of a honeycomb structure formed of non-combustible paper containing sepiolite as a main component, and the core on both sides of the core. An inorganic filling layer formed from an inorganic filler having an inorganic hollow body as a main material and an inorganic binder, each of which is integrally bonded in a state in which the tip portion is embedded,
The steel sheet is joined to the surface of each of the inorganic filling layers.

A refractory laminated panel according to claim 2 is the refractory laminated panel according to claim 1 above.
One of the inorganic filler layers is omitted. That is, a core made of a honeycomb structural material formed of non-combustible paper containing sepiolite as a main component and one surface of the core are integrally bonded in a state where the tip portion of the core is embedded, and the inorganic hollow body is formed. It is provided with an inorganic filler layer formed from an inorganic filler and an inorganic binder having as a main material, and steel plates bonded to the surface of the inorganic filler layer and the surface on the other side of the core, respectively.

[0011]

According to the first aspect of the present invention, the honeycomb structure material as the core is made of non-combustible paper containing sepiolite as a main component, and the filling layer is made of the inorganic filler and the inorganic binder. Together with the steel sheets, the whole is substantially incombustible and is formed as an inorganic laminate having high heat resistance. Therefore, excellent fire resistance and fire resistance can be obtained. Further, the core is formed as a lightweight honeycomb structure material, and the inorganic filler forming the filling layer is mainly made of an inorganic hollow body, so that the entire structure is made lightweight. Further, since the core made of the honeycomb structure and the inorganic filling layers formed on both sides of the core are integrally joined in a state where the tip portions of both sides of the core are embedded in the inorganic filling layer, it is possible to prevent bending. The core having relatively low strength is reinforced by the inorganic filling layer forming the beam structure, while the relatively brittle inorganic filling layer is reinforced by the core made of the honeycomb structural material. Therefore, high strength is obtained in combination with the steel plate as a surface material that is further bonded to the surface of each inorganic filling layer. In this way, it is possible to obtain a fire-resistant laminated panel which is excellent in fire resistance and fire resistance, is lightweight, and has high strength.

Further, in the second aspect, the fireproof property, the fire resistance and the strength are slightly lowered by the amount of one of the inorganic filling layers being omitted, but the same effect as in the first aspect is exerted.
That is, it is possible to obtain a fire-resistant laminated panel which is excellent in fire resistance and fire resistance, is lightweight, and has high strength.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

[First Embodiment] FIG. 1 is a sectional view showing a fire-resistant laminated panel according to a first embodiment of the present invention. Further, FIG. 2 is a perspective view showing the entire (part) of the fireproof laminated panel with a part thereof cut away. Further, FIG. 3 is an explanatory view showing a method for manufacturing the fireproof laminated panel. Furthermore,
FIG. 4 is a graph showing the temperature change during the heating test of this fireproof laminated panel.

As shown in FIGS. 1 and 2, the refractory laminated panel of the present embodiment, which is designated by 10 in its entirety, is formed as a laminated structure, and has a core 1 made of a honeycomb structure, and the core 1.
An inorganic filling layer 2 integrally bonded to each of the surfaces on both sides of the core 1 with the tip portion of the core 1 embedded therein, and a steel plate 3 as a surface material joined to the surface of each of these inorganic filling layers 2. It consists of Here, the honeycomb structure material as the core 1 is formed of non-combustible paper containing sepiolite as a main component, and the inorganic filling layer 2 is formed of an inorganic filler mainly containing an inorganic hollow body and an inorganic binder. .

These fireproof laminated panels 1 of the present embodiment
The core 1, the inorganic filling layer 2, and the steel plate 3 forming 0 will be described in more detail.

<Core (Honeycomb Structure Material)> The core 1 is a lightweight honeycomb structure material having high strength, that is,
A large number of columnar cells are made of honeycomb structure material formed in a honeycomb shape by partition walls in the thickness direction. The columnar cells are most generally formed in a hexagonal cross section, and are preferable, but other polygonal shapes such as quadrangle or non-gonal shape such as circular can be formed. Then, in the present embodiment, the honeycomb structure material is formed from non-combustible paper containing sepiolite as a main component. A honeycomb structure material itself formed from such a non-combustible paper is disclosed in, for example, Japanese Patent Laid-Open No. 5-14713
Although it is already known as disclosed in Japanese Patent No. 4 publication, the non-combustible paper and a method for manufacturing a honeycomb structure material from the non-combustible paper will be briefly described below.

(Incombustible paper) Sepiolite, which is the main component of incombustible paper, is a clay mineral called mountain leather (mountain skin), mountain cork, or mountain wood, and sepiolite in Japan is one of these. The appearance may be cork-like, leather-like, or a pure white soft lump, but it is generally a hydrated magnesium silicate lump. The surface has a polar group with high reactivity and has basic properties such as adsorptivity, thixotropy, and caking property.

Sepiolite, which is a hydrous magnesium silicate mineral, is not only excellent in caking property due to its hydroxyl group, but also excellent in compatibility with water, and easily dispersed by being charged with cations or nonions in water. To do. Therefore, a sheet can be easily formed by paper making, and the formed sheet has sufficient paper strength. Therefore, sepiolite can also be used alone as a component to form non-combustible paper. However, in order to more sufficiently enhance the handling strength of the formed incombustible paper, it is preferable to use reinforcing fibers together.

As the reinforcing fibers, glass fibers, mineral fibers such as rock wool fibers, metal fibers such as stainless fibers, ceramic fibers such as potassium titanate fibers or inorganic compound fibers such as whiskers and gypsum fibers are used. be able to. However, from the viewpoints of material cost, agglomeration effect, etc., glass fiber is most suitable among them. Then, these inorganic fibers can be generally mixed in a proportion of 3 to 20% by weight with respect to the entire noncombustible sheet.

As the reinforcing fibers, not only inorganic fibers but also organic fibers such as wood pulp or woven fabric fibers such as phosphoric acid pulp, aramid fiber and vinylon fiber, which are flame-retardant, can be used. . However, the blending amount thereof is preferably 10% by weight or less based on the whole nonflammable paper in order to ensure sufficient nonflammability, fire resistance, and shape retention after thermal decomposition. It is more preferably not more than wt%.

Further, in addition to these reinforcing fibers, various inorganic fillers can be blended, if necessary.
Such inorganic fillers include aluminum hydroxide,
Inorganic powders having self-extinguishing properties such as hydrous calcium borate (apatite) and magnesium hydroxide (brucite) are particularly preferable. In addition, binding inorganic fillers such as colloidal silica, vermiculite, plate particles such as synthetic swelling mica or synthetic smectite are also preferable for imparting strength to the noncombustible sheet. However, these inorganic fillers are used in a relatively small proportion so as not to impair the characteristics of sepiolite as a main material.

Furthermore, a binder made of a polymer compound may be added to the non-combustible paper in order to enhance the paper strength. As the binder, a natural polymer compound such as guar gum and starch can be used, but a synthetic synthetic resin is preferably used. And, as the synthetic resin, any of a thermoplastic resin and a thermosetting resin fat can be appropriately used, and preferably, a cation-based, anion-based, or nonion-based one that also acts as an aggregating agent during papermaking is used. To be done. The thermoplastic resin mainly enhances paper strength when drying non-combustible paper, and is typically an acrylic resin such as polyamide or polyacrylamide, a polyester resin, or the like. Further, the thermosetting resin mainly enhances the paper strength when the non-combustible paper is wet, and typical examples thereof include urea-formaldehyde resin, melamine-formaldehyde resin, and epichlorohydrin-based polyamide resin. The binders composed of these polymer compounds can be used alone or in combination, but it is preferable to adjust the binder content to be generally up to 5% by weight with respect to the whole non-combustible paper.

The non-combustible paper can be formed by papermaking from a slurry in which these materials are dispersed, as a sheet having a thickness of generally 0.2 to 0.5 mm.
An example of the composition is shown below.

[0025]

[Table 1]

In this non-combustible paper, the total amount of organic components such as pulp is 5% by weight based on the whole. Therefore, the organic components of the non-combustible sheet are carbonized when heated at a high temperature (800 to 1000 ° C.), but the strength of the sheet after carbonization is small, and the sheet has sufficient heat-resistant shape retention.

(Manufacture of Honeycomb Structure Material) Using the above-mentioned non-combustible paper containing sepiolite as a main component, a honeycomb structure material can be formed, for example, as follows, by a commonly known method.

First, an adhesive is applied to the surface of a sheet of non-combustible paper in a stripe shape at a predetermined interval by screen transfer or roller application. The width of this adhesive strip determines the length of the polymerized portion of the honeycomb structure, and by changing the width and pitch of this adhesive strip, the shape and dimensions of the cells that make up the honeycomb structure are determined. It can be changed as desired. Then, a large number of sheet-shaped non-combustible papers on which the adhesive strips are formed in this manner are overlapped so that the adhesive strips are displaced from each other by a half pitch between the adjacent non-combustible papers, and the sheets are stacked in the vertical direction. Crimping and adhering to each other.
Next, the blocks made of a large number of non-combustible papers bonded to each other are cut into a predetermined width according to the required thickness of the honeycomb structure material in a direction perpendicular to the adhesive strip. Then, a honeycomb structure material is formed by expanding the cut object from both sides.

As the adhesive used for manufacturing the honeycomb structure material, an organic adhesive such as vinyl acetate resin can be used because non-combustible paper has high heat resistance. However, in order to obtain better fire resistance and heat resistance, it is preferable to use an inorganic adhesive. As such an inorganic adhesive, water glass (silicate), aluminum phosphate, colloidal silica, colloidal alumina, or the like, which is appropriately mixed with an aqueous solution or dispersion of a curing agent, can be used. . An example thereof is a silica-based inorganic adhesive having a solid content composition of 90% by weight of colloidal silica and 10% by weight of magnesium silicate.

It is also preferable to impregnate or coat the honeycomb structure material formed of non-combustible paper with a water glass composition such as sodium or potassium silicate. As a result, a hardened coating of water glass is formed on the surface of the non-combustible paper, and the physical strength and water resistance of the honeycomb structure, as well as the fire resistance and heat resistance can be further increased.
The water glass composition used for impregnation or coating of the honeycomb structure material is, for example, a modified water glass composition comprising 88% by weight of solid sodium silicate and 12% by weight of magnesium oxide (curing agent). It can be formed as an object.

<Inorganic Packing Layer> The inorganic packing layer 2 is formed of an inorganic filler mainly composed of an inorganic hollow body and an inorganic binder.

Here, the inorganic hollow body, which is the main material of the inorganic filler, is one in which the inside of the filler particles is not solid but is completely or incompletely hollow. Specific examples thereof include glass balloons such as shirasu balloon and silica balloon, ceramic balloons such as alumina-silica balloon, calcined vermiculite and perlite. Among them, the shirasu balloon made of expanded silica particles generally has a bulk specific gravity of 0.15 to 0.
It is as small as 21, and the thermal conductivity is 0.05-0.06Kc.
al / mhr ℃ is low, and the softening start temperature is 800-100
The melting point is as high as 0 ° C and 1200 to 1300 ° C. for that reason,
Shirasu balloon can be particularly preferably used as a main material of an inorganic filler forming an inorganic filling layer.

As the inorganic filler, mica powder, silica, calcium silicate, talc, diatomaceous earth and the like can be used in combination with the above-mentioned inorganic hollow body. Also,
As such an inorganic filler, aluminum hydroxide,
Inorganic powders having a self-extinguishing property such as hydrous calcium borate (apatite) and magnesium hydroxide (brucite) are particularly preferable. Fibers for reinforcement can also be used to increase the strength of the formed inorganic filling layer. Such fibers include rock wool, alumina fibers,
Examples thereof include silica fibers, potassium titanate fibers, carbide fibers such as silicon carbide, glass fibers, and whiskers. Among these, glass fiber is preferable because it is inexpensive. Further, metal fibers such as steel, or organic fibers such as aramid fibers can be used as necessary. However, it is preferable to use them in the minimum amount in terms of heat insulation or fire resistance.

An inorganic binder is used as a binder for binding the inorganic filler to form an inorganic filling layer because of its fire resistance. As the inorganic binder, a binder that is hardened by hydration reaction such as Portland cement or gypsum, or a binder that is hardened by polymerizing water glass (silicate), phosphate, colloidal silica or the like. Any of these can be used. However, among these, a strong inorganic filling layer can be formed in a small amount, and the curing time is relatively short, and thus, for example, a water glass composition obtained by adding zinc borate as a curing agent to water glass. The product, or colloidal silica is particularly preferable.

Then, this inorganic filling layer can be formed, for example, from the following composition.

[0036]

[Table 2]

According to this composition, since the main component is the shirasu balloon, which is an inorganic hollow body, it is possible to form a lightweight and highly heat-insulating inorganic filling layer.

The fireproof laminated panel 10 of the present embodiment.
In the above, the thickness of the inorganic filling layer 2 can be arbitrarily determined according to required strength, fire resistance or heat insulation, sound insulation, or the like. Therefore, this panel 10
If is formed as a front and back side, the thickness of the front side and the back side can be changed accordingly.
However, since the inorganic filling layer 2 is bonded to the core 1 made of the honeycomb structure by being embedded therein, it is preferable that the inorganic filling layer 2 has a sufficient thickness for the non-combustible paper forming the core 1. Therefore, the thickness of the inorganic filling layer 2 is preferably at least 5 times or more the thickness of the non-combustible paper, and generally, it depends on the thickness of the core 1, but is preferably about 4 to 15 mm.

<Steel Plate (Surface Material)> In the fireproof laminated panel 10 of the present embodiment, the surface material or the back surface material is
The steel plate 3 having high surface strength, excellent weather resistance, particularly water resistance, and good appearance is used. However, this steel plate 3
As the material, a material having sufficient corrosion resistance is used. Specifically, various types of steel sheets specified by JIS, for example, hot-dip galvanized steel sheet, hot-dip galvanized steel sheet, hot-dip aluminized steel sheet, stainless steel sheet, coated stainless steel sheet, 22Cr ferritic stainless steel sheet, etc. should be used. You can

The thickness depends on the required surface strength,
It can be arbitrarily determined according to weather resistance and the like. However, if the steel plate 3 as the surface material or the back surface material is too thick, not only the processing becomes difficult, but also the panel 1
The overall weight of 0 also increases. Therefore, it is preferable to use the steel plate 3 having a thickness of generally 1.0 mm or less, preferably 0.5 mm or less. In addition, when the fire-resistant laminated panel 10 is formed as one having front and back sides,
The front side steel plate 3, that is, the steel plate 3 as the surface material, and the back side steel plate 3, that is, the steel plate 3 as the back surface material, may be different in thickness and type.

The steel sheet 3 as the surface material or the back surface material can be bonded to the surface of each inorganic filling layer 2 by generally bonding. Here, as the adhesive, it is preferable to use an inorganic adhesive from the viewpoint of fire resistance, but from the viewpoint of adhesive strength, etc., rather, an epoxy resin type, a phenol resin type, a vinyl acetate resin type, or An organic adhesive such as a hot melt adhesive can be used. Even if these organic adhesives are carbonized or burned to lose their adhesive strength at the time of fire, the adhesiveness does not significantly affect the fireproofness or shape retention of the panel 10, and the surface material Alternatively, the steel plate 3 as the back surface material is attached to the base material at the joint or the like with screws or the like. It should be noted that these steel plates 3 can be joined to the inorganic filling layer 2 by a method other than bonding, for example, by mechanical attachment or by integral joining simultaneously with the formation of the inorganic filling layer 2.

<Manufacture of Fireproof Laminated Panel> The fireproof laminated panel 10 of the present embodiment comprising the core 1, the inorganic filling layer 2 and the steel plate 3 can be manufactured as follows. This will be described with reference to FIG.

1) First, an aqueous composition for forming an inorganic filling layer 2 comprising an inorganic filler having an inorganic hollow body as a main material and an inorganic binder such as water glass or colloidal silica is prepared. This composition is prepared using a high speed blender or the like, and the water content is adjusted so as to have appropriate fluidity. Then, as shown in FIG.
The prepared composition is poured onto the surface of a flat mold m having releasability, and the surface of the composition is uniformly leveled so as to have a predetermined thickness. Thus, a thick aqueous composition layer 2a for forming the inorganic filling layer 2 is formed on the surface of the molding die m.

2) Next, as shown in FIG. 3 (b), while the aqueous composition layer 2a of the inorganic filling layer 2 is not cured (gelled), the core 1 made of a non-combustible paper honeycomb structure material is formed in the layer. 2a, and the tip portion of one surface of the core 1 is embedded in the aqueous composition layer 2a. Then, in this state, the aqueous composition layer 2a of the inorganic filling layer 2 is gelled,
Also dry. As a result, the cured inorganic filling layer 2
Is formed, and the tip portion of the core 1 is integrally bonded to the inorganic filling layer 2 with the tip portion thereof being embedded therein. Note that the drying at this stage is not necessarily required to be complete as long as the inorganic filling layer 2 is sufficiently hardened and is sufficiently bonded to the core 1. Moreover, although this drying may be natural drying, it can be efficiently performed by forced heat drying. For example, in the case of heat drying with a hot plate, it can be performed under the conditions of 80 ° C. × 5 minutes.

3) Next, as in 1) above, the molding die m
The same aqueous composition for forming the inorganic-filled layer 2 on the other side is poured on the surface of, to form a layer 2b of the aqueous composition. This state is shown in FIG. Then, similarly to the above 2), while the aqueous composition layer 2b is not cured (gelled), the core 1 on which the inorganic filling layer 2 is formed is placed on one surface, and the other surface of the core 1 is placed. The tip portion of the composition is embedded in the aqueous composition layer 2b, and then the aqueous composition layer 2b is dried and cured in that state.

4) As a result, as shown in FIG. 3D, a core panel in which the inorganic filling layer 2 is integrally bonded to both sides of the core 1 with the tip portion of the core 1 embedded is formed. To be done. Then, after sufficiently drying and curing this core panel, a steel plate 3 as a front plate and a back plate is formed.
Are bonded to the surface of each inorganic filling layer 2. The joining can be performed by, for example, bonding, and by applying an adhesive agent to the entire back surface of each steel plate 3 and attaching the adhesive to the front surface of the inorganic filling layer 2.

Thus, as shown in FIGS. 1 and 2, the steel plate 3, the inorganic filling layer 2, the core 1 made of the honeycomb structure,
The inorganic filling layer 2 and the steel plate 3 are laminated in this order, and the tip end portions of both surfaces of the core 1 are embedded in the inorganic filling layer 2 to form the fireproof laminated panel 10 of the present embodiment.

<Effect> As described above, the fire-resistant laminated panel 10 of the present embodiment has the core 1 made of a honeycomb structure formed of non-combustible paper containing sepiolite as a main component, and the core 1 on both sides of the core 1. , An inorganic filling layer 2 formed by an inorganic filler and an inorganic binder mainly composed of an inorganic hollow body, which are integrally bonded in a state in which the tip portion of the core 1 is embedded, and the respective inorganic filling layers 2 And a steel plate 3 bonded to the surface of each of them, and this can be an aspect of claim 1.

Therefore, according to the fire-resistant laminated panel 10 of the present embodiment, the core 1 made of the honeycomb structure is formed of the non-combustible paper containing sepiolite as a main component, and the inorganic filler is formed on both sides of the core 1. Since the inorganic filling layer 2 formed of the above and an inorganic binder is integrally bonded, and the front surface material or the back surface material is formed of the steel plate 3, the whole is substantially incombustible and is made of a heat resistant inorganic material. Formed, and excellent fire resistance and fire resistance are obtained.

Further, the inorganic filling layer 2 also functions as a heat insulating layer, but since the tip portion of the core 1 made of a honeycomb structure is embedded and integrally bonded to this, the core 1 is A structure serving as a beam is formed to firmly reinforce the core 1 which is relatively weak against bending. On the contrary,
The core 1 made of a honeycomb structure serves as a reinforcing material for the inorganic filling layer 2 which has high hardness but is brittle in strength, and reinforces this. Therefore, in combination with the steel plate 3 being further bonded to the surface of the inorganic filling layer 2, high rigidity and high strength can be obtained. Further, the core 1 is made of a honeycomb structural material, which is a very lightweight structural material, and the inorganic filler forming the inorganic filling layer 2 is mainly made of an inorganic hollow body, so that the entire structure is made lightweight.

<Fireproof Test Example> Here, the fireproof laminated panel 10 of the present embodiment, in particular, its fireproof performance will be specifically described based on the test results.

The fire-resistant laminated panel 10 used in the fire-resistant test is
The width is 208 cm and the height (vertical length) is 283 cm, and the thickness is 50 mm. However, the width is 3
Two joints in the vertical direction are formed so as to be equally divided, and the steel plates 3 on both sides are joined to each other at the joints.

More specifically, the core 1 is a hexagonal cell-shaped (cell size 20 mm) honeycomb formed of 0.31 mm thick non-combustible paper having the composition shown in Table 1 using a colloidal silica adhesive. Structural material with a thickness of 49m
m. The core 1 is impregnated and coated with a water glass composition. In addition, each inorganic filling layer 2
Has the composition shown in Table 2 and has a thickness of 8 mm. Therefore, the core 1 is embedded in each inorganic filling layer 2 by 8 mm at the tip portions on both sides thereof. Further, the steel sheet 3 is composed of a coated hot-dip galvanized steel sheet having a thickness of 0.50 mm on one side (front side), and the other (back side) of 0.
It consists of the same coated hot-dip galvanized steel sheet with a thickness of 35 mm. And these steel plates 3 are joined to each inorganic filling layer 2 by an epoxy resin adhesive. The weight of the core panel consisting of the core 1 and the inorganic filling layers 2 on both sides thereof is about 8 kg per square meter,
It is extremely lightweight.

(Heating Test) FIG. 4 shows the results of measuring the surface temperature of the back side when the front side of the fireproof laminated panel 10 was heated for 60 minutes using a gas burner furnace. Is. Where the temperature curve A
Is the flame temperature measured at a position 3 cm away from the panel surface on the heating side (front side). Also, the temperature curve B
Is a measurement of the panel surface temperature on the back side (non-heated side). However, here, as the measurement position of the back side surface temperature, a position which is most unlikely to be affected by the heat conduction of the steel plate on the front side is selected.

As shown in FIG. 4, the temperature on the heating side exceeds 800 ° C. after 20 minutes, and is close to 1000 ° C. at the maximum. However, on the other hand, the backside (non-heated side) surface temperature of the fire-resistant laminated panel 10 gradually rises with the passage of time, but does not exceed 100 ° C., and the maximum is that heating has already stopped. After 75 minutes, the temperature is 93 ° C. This backside surface temperature is 260 ° C.
Is much lower than. That is, this result shows that the fire-resistant laminated panel 10 has high heat insulation and is excellent in fire resistance and fire resistance.

(Deformation, Destruction, etc.) 15 minutes after the start of the heating test, the steel sheet on the non-heating side (back side) had a convex deflection of about 3 mm. However, other than the deflection of the back side steel plate at the time of heating and the deformation of the front side steel plate after the heating test for 60 minutes (permanent deformation due to heat), no other deformation, fracture, dropout, generation of cracks, etc. was observed. It was This indicates that the fire-resistant laminated panel 10 has excellent shape-retaining property when heated at high temperature.

(Impact Test) In order to evaluate the strength of the fireproof laminated panel 10 after the heating test, 5 k was applied to the surface on the heating side.
An impact test was conducted in which the weight g was dropped from a height of 1 m and collided. As a result, the impact part has a diameter of 28 mm and a depth of 3.3.
Although a dent of mm was generated, no other abnormalities occurred. This result shows that even if the fire-resistant laminated panel 10 is heated to a high temperature for a long time, its strength is not significantly reduced.

(Others) No smoke was observed during the heating test. Further, although an epoxy resin-based organic adhesive was used for bonding the steel sheet 3, the thermal decomposition odor and the like were not felt. It is considered that those odor components and the like were adsorbed by the sepiolite of the noncombustible paper forming the core 1.

As described above, the fire-resistant laminated panel 10 of the present embodiment has high rigidity and strength, is not only lightweight, but also has excellent fire resistance and fire resistance. Therefore, this fire-resistant laminated panel 10 is not only used as a fire-resistant wall material for factories, but also for large-scale structures such as warehouses, gymnasiums, event facilities, etc., as well as wall materials for general houses or stores, or partitions, It can be suitably used for doors and the like. Then, the steel plate 3 as the surface material can be subjected to various design surface finishes and the like depending on the specific applications thereof.

[Second Embodiment] FIG. 5 is a sectional view showing a fire-resistant laminated panel according to a second embodiment of the present invention. In the figure, the same reference numerals are used for the same or corresponding portions as those of the fire-resistant laminated panel of the first embodiment. Further, FIG. 6 is a graph showing a temperature change of the fireproof laminated panel during a heating test.

As shown in FIG. 5, the refractory laminated panel of the present embodiment, which is designated by 20 in its entirety, is integrally joined to both sides of the core 1 in the refractory laminated panel 10 of the first embodiment. The inorganic filling layer 2 is formed more simply by omitting the inorganic filling layer 2 on the back side during use.

That is, the fireproof laminated panel 20 of the present embodiment
Is formed as a laminated structure composed of a steel plate 3, an inorganic filling layer 2, a core 1 made of a honeycomb structural material, and a steel plate 3 in order from the side which is generally the front side during use. Then, the inorganic filling layer 2 and the core 1 made of the honeycomb structure material are integrally joined in a state where the tip portion of the core 1 is embedded in the inorganic filling layer 2. Further, the steel sheet 3 as the front surface material and the back surface material is bonded to the surface of the inorganic filling layer 2 and the surface on the other side of the core 1 by bonding with an adhesive in general.

Here, the technical details of the core 1, the inorganic filling layer 2, and the steel plate 3 are the same as in the case of the first embodiment. The core 1 is made of a honeycomb structure material made of non-combustible paper containing sepiolite as a main component. The inorganic filling layer 2 is formed of an inorganic filler such as shirasu balloon or the like having an inorganic hollow body as a main material and an inorganic binder such as water glass or colloidal silica. Further, the steel plate 3 is made of a hot dip galvanized steel plate, a hot dip aluminum plated steel plate, a stainless steel plate, or the like, which is appropriately colored.

The fireproof laminated panel 20 of this embodiment is also used.
The manufacturing method is also the same as in the case of the first embodiment, except that the step shown in FIG. 3C is omitted.
It can be manufactured by substantially the same method as the case of the fire-resistant laminated panel 10 of the first embodiment.

As described above, the fire-resistant laminated panel 20 of the present embodiment has the core 1 made of the honeycomb structure formed of non-combustible paper containing sepiolite as a main component, and the core 1 on one surface thereof. An inorganic filler layer 2 formed of an inorganic filler mainly composed of an inorganic hollow body and an inorganic binder, which are integrally bonded in a state in which the tip portion of the core 1 is embedded;
And a steel plate 3 joined to the surface of the inorganic filling layer 2 and the other surface of the core 1 respectively.
This corresponds to the aspect of claim 2.

Therefore, except that the inorganic filling layer on the other side of the core 1 is omitted, it is the same as the fire-resistant laminated panel 10 of the first embodiment, and the same effect can be obtained. That is, the fireproof laminated panel 2 of the present embodiment
According to 0, since the whole is substantially incombustible and is formed of a heat-resistant inorganic material, excellent fire resistance and fire resistance can be obtained. Further, since the core 1 made of the honeycomb structure and the inorganic filling layer 2 are integrally joined with the tip end portion of the core 1 being embedded in the inorganic filling layer 2, the steel plate 3 should be further joined. Together with this, high rigidity and high strength can be obtained. Further, the core 1 is made of a honeycomb structural material, which is a very lightweight structural material, and the inorganic filler forming the inorganic filling layer 2 is mainly made of an inorganic hollow body, so that the entire structure is made lightweight.

However, since the inorganic filler layer on the other side is omitted, the fire resistance and fire resistance are slightly lower than those of the fire resistant laminated panel 10 of the first embodiment, and the rigidity and strength are also slightly decreased. To do. However, on the contrary, there are advantages that the manufacturing becomes simpler, the cost can be reduced, and the weight becomes lighter.

<Fireproof Test Example> Similar to the first embodiment, the fireproof laminated panel 20 of the present embodiment is as follows.
In particular, the fire resistance performance will be specifically described based on the test results.

The fire-resistant laminated panel 20 subjected to the fire-resistant test is
The size is 211 cm in width × 283 cm in height (vertical length), and the thickness is 30 mm. However, three rows of joints in the vertical direction are formed so as to divide the width into approximately four equal parts, and the steel plates 3 on both sides are joined together at the joints.

More specifically, the core 1 is a hexagonal cell-shaped (cell size 15 mm) honeycomb formed of non-combustible paper having a composition of Table 1 and having a thickness of 0.31 mm using a colloidal silica adhesive. Structural material with a thickness of 29 m
m. The core 1 is impregnated and coated with a water glass composition. In addition, the inorganic filling layer 2
Has the composition shown in Table 2 and has a thickness of 5 mm. Therefore, 5 mm of the tip portion of the core 1 is embedded in the inorganic filling layer 2. Further, the steel sheet 3 is composed of a coated hot-dip galvanized steel sheet having a thickness of 0.50 mm on the side bonded to the inorganic filling layer 2 (front side), and the same coated hot-dip galvanized steel sheet having a thickness of 0.35 mm on the other side (back side). Has become. Then, these steel plates 3 are joined to the inorganic filling layer 2 and the core 1 by adhesion with an epoxy resin adhesive. The weight of the core panel consisting of the core 1 and the inorganic filling layer 2 integrally bonded to the core 1 is about 2 kg per square meter, which is very lightweight.

(Heating Test) FIG. 6 shows a heating test (J) for the above fireproof laminated panel 20 using a gas burner furnace.
It shows the results of measuring the surface temperature of the back side when IS A 1302) was performed and the front side was heated for 30 minutes. Here, the temperature curve A is the flame temperature measured at a position 1 cm away from the panel surface on the heating side (front side). A temperature curve B is a measurement of the panel surface temperature on the back side (non-heating side). However, the position where the back surface temperature is measured is selected here so that it is least affected by the heat conduction of the front steel plate.

As shown in FIG. 6, the temperature on the heating side reaches a maximum of 900 ° C. after about 10 minutes, and thereafter gradually decreases to 200 ° C. On the other hand, the backside (non-heated side) surface temperature of the fire-resistant laminated panel 10 gradually increased with the passage of time, but did not exceed 100 ° C., and the maximum heating was stopped 32. After a minute, the temperature at that time is 89 ° C. This backside surface temperature is far below the specified value of 350 ° C. for outdoor fire protection class 2. As described above, the fireproof laminated panel 20 has high heat insulation and excellent fireproofing.

(Deformation, Destruction, etc.) 15 minutes after the start of the heating test, the non-heated side (back side) of the steel sheet had a concave deflection of about 8 mm. However, no other deformation, breakage, dropout, generation of cracks, etc. was observed other than the bending of the back side steel plate at the time of heating and the deformation (permanent deformation by heat) of the front side steel plate after the heating test for 30 minutes. It was This indicates that the fire-resistant laminated panel 20 is excellent in shape retention during high temperature heating.

(Impact Test) In order to evaluate the strength of the fire-resistant laminated panel 20 after the heating test, 1 k was applied to the surface on the heating side.
An impact test was conducted in which the weight of g was dropped from a height of 1.5 m and collided. As a result, a dent having a diameter of 16 mm and a depth of 0.7 mm was formed in the impact portion, but no other abnormalities occurred. This result shows that even if the fireproof laminated panel 10 is heated to a high temperature, its strength is not significantly reduced.

(Others) As in the case of the first embodiment, no smoke or the like was observed during the heating test. Also, there was no smoke or ignition on the back surface, and there was no afterflame on the heating surface. Further, although an epoxy resin-based organic adhesive was used for bonding the steel sheet 3, the thermal decomposition odor and the like were not felt. It is considered that those odor components and the like are adsorbed by the sepiolite of the noncombustible paper forming the core 1, as described above.

As described above, the fire-resistant laminated panel 20 of the present embodiment has high rigidity and strength, is not only lightweight, but also has excellent fire resistance and fire resistance. Therefore, the fireproof laminated panel 10 can be advantageously used as a fireproof wall material for a general house, a factory, or the like, or as a partition, a fireproof door, or the like.

[0077]

As described above, the fire-resistant laminated panel according to the first aspect of the present invention comprises a core made of a honeycomb structural material formed of non-combustible paper containing sepiolite as a main component, and the cores on both sides of the core. The tip portion is integrally bonded in a state of being embedded, and an inorganic filling layer formed of an inorganic filler and an inorganic binder having an inorganic hollow body as a main material, and joined to the surface of each inorganic filling layer. And a steel plate.

Therefore, since the honeycomb structure material as the core is formed of non-combustible paper containing sepiolite as a main component and the filling layer is formed of the inorganic filler and the inorganic binder, the heat insulating property is high and the surface is The whole of the steel sheets as the material is substantially incombustible and is formed as an inorganic laminate having high heat resistance. Therefore, according to this fire resistant laminated panel, excellent fire resistance and fire resistance can be obtained. Further, the core is formed as a lightweight honeycomb structure material, and the inorganic filler forming the filling layer is mainly made of an inorganic hollow body, so that the whole is formed to be lightweight. Furthermore,
The inorganic packing layer has high rigidity, and since the inorganic packing layer and the core made of the honeycomb structure are integrally bonded with the tip portions of both sides of the core embedded in the inorganic packing layer, the strength against bending is high. The relatively weak cores, on the other hand, are reinforced by the inorganic packing layers forming the beam structure, while the relatively brittle inorganic packing layers are reinforced by the core of honeycomb structure. Therefore, in combination with the steel plate as a surface material that is further bonded to the surface of each inorganic filling layer, high rigidity and high strength can be obtained.

That is, there is an effect that it is possible to obtain a fireproof laminated panel which has excellent fireproofness and fireproofness, is lightweight and has high strength. Since a steel plate is used as the surface material or the back surface material, it has good weather resistance, and also has an effect that a fire-resistant laminated panel excellent in decoration or design can be obtained by performing an appropriate surface treatment or the like. .

Further, in the fire-resistant laminated panel according to the second aspect of the present invention, a core made of a honeycomb structure material made of non-combustible paper containing sepiolite as a main component and a tip portion of the core on one surface of the core are provided. An inorganic filling layer formed from an inorganic filler and an inorganic binder mainly composed of an inorganic hollow body, which are integrally bonded in a buried state, and the surface of the inorganic filling layer and the other surface of the core, respectively. And a joined steel plate. That is, claim 1 above
In the fire-resistant laminated panel according to the present invention, one of the inorganic filling layers is omitted.

Therefore, since only one inorganic filling layer is omitted, the same effect as in the case of the fireproof laminated panel of claim 1 can be obtained. That is, there is an effect that it is possible to obtain a fire-resistant laminated panel which has excellent fire resistance and fire resistance, is lightweight, and has high strength. However, since one of the inorganic filling layers is omitted, the fire resistance and fire resistance are slightly lower than in the case of the fire resistant laminated panel according to claim 1,
Also, the strength is slightly reduced. However, conversely, there is an effect that the manufacturing becomes simpler, the cost can be reduced, and the weight can be further reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing a fire-resistant laminated panel according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the whole (part) of the laminated panel of the first embodiment of FIG. 1 with a part thereof cut away.

FIG. 3 is an explanatory view showing a method for manufacturing a fire-resistant laminated panel according to the first embodiment.

FIG. 4 is a graph showing a temperature change during a heating test of the refractory laminated panel according to the first embodiment.

FIG. 5 is a sectional view showing a fireproof laminated panel according to a second embodiment of the present invention.

FIG. 6 is a graph showing a temperature change during a heating test of the fire-resistant laminated panel according to the second embodiment.

[Explanation of symbols]

 1 Core (Honeycomb Structure Material) 2 Inorganic Filling Layer 3 Steel Plate 10, 20 Fireproof Laminated Panel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kozo Hayashi 65, Kakamigahara City, Gifu Prefecture, Tokiwa Denki Co., Ltd. (72) Inventor, Kyoichi Fujimoto 65, Kakamigahara City, Gifu, Tokiwa Denki Co., Ltd.

Claims (2)

[Claims] 1. A core made of a honeycomb structural material formed of non-combustible paper containing sepiolite as a main component, and integrally bonded to both side surfaces of the core in a state in which tip portions of the core are embedded. A refractory laminated panel comprising: an inorganic filler layer formed of an inorganic filler mainly composed of an inorganic hollow body and an inorganic binder; and steel plates joined to the surfaces of the inorganic filler layers, respectively. 2. A core made of a honeycomb structural material formed of non-combustible paper containing sepiolite as a main component, and integrally bonded to one surface of the core with a tip portion of the core embedded therein. An inorganic filling layer formed from an inorganic filler having an inorganic hollow body as a main material and an inorganic binder, and a steel sheet bonded to the surface of the inorganic filling layer and the other surface of the core respectively. Characteristic fireproof laminated panel.