JPS605468B2 - Manufacturing method of foam fireproof board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a foamable fireproof board that has long-term port resistance and excellent fire protection performance in the event of a fire.

More specifically, a fire-retardant material containing water glass and mountain bark that can foam when heated to form a fire-retardant heat insulating layer is applied or attached to a thin metal plate, and the surfaces of the fire-retardant material are glued together, or the thin metal plate is attached to the fire-retardant surface. This is a method for manufacturing a foam fireproof board characterized by laminating.

Up until now, many researchers have conducted research and development on foamable fireproofing boards that foam when exposed to high temperatures such as fire to form a fireproof and heat-insulating layer, but none have been put into practical use yet. I can't find it. Although conventional foam fireproofing boards perform their function well in experiments immediately after they are manufactured, several years after installation, when they are actually exposed to flames, they fail to foam sufficiently and serve their purpose. This is because it cannot be achieved. The inventors of the present invention have focused their efforts on investigating the cause of this problem, and have found that over time, during storage or after construction, the foaming material in the fireproof board becomes irreversible due to moisture, oxygen, carbon dioxide gas, sulfur dioxide gas, etc. The main causes of this are deterioration and deterioration, which may result in insufficient foaming in the event of a fire, uneven foaming, cracks in the foam layer, or layers falling off. It has been found. Based on this knowledge, the present inventors completed the present invention after extensive research.

The foamable fireproof board manufactured according to the present invention is covered with thin metal plates that completely block liquids, gases, and light from both the front and back sides of the foamable composition layer. No alteration or deterioration will occur.

In fact, the foamable fireproofing board obtained according to the present invention has a much superior fire prevention and insulation effect after exposure to certain severe conditions, compared to a foamable fireproofing board whose both sides are covered only with cardboard. The thin metal sheets used in the present invention include thin sheets of aluminum, zinc, tinplate, iron, etc., and thin sheets of these metals, such as sheets laminated with thin metal sheets such as paper, cloth, synthetic resin films, etc. can be given.

Particularly preferred examples of sheets laminated with thin metal plates include aluminum foil/paper, aluminum foil/plastic film/paper, plastic film/aluminum foil, plastic film/aluminum foil/paper (or plastic), and the like.

And in those thin metal plates, the thickness of the metal plate alone is 5
The thickness of the thin metal plate laminated sheet is preferably about 0.05 to 2 mm. The fireproofing material containing water glass and sepiolite that can foam when heated to form a fireproof heat insulating layer used in the present invention includes foamable compositions containing water glass and sepiolite, particularly solid solids. 30-70%, preferably 40-55
% of hydrated water glass and about 0.05 to 125 parts by weight, preferably about 0.1 to 5 parts by weight of mountain bark per 10 parts by weight of solid content in the hydrated water glass. When the modified water glass composition is applied to a thin metal plate, it can be applied thickly, has good adhesion to the metal plate, and has very good drying properties.

Water glass is composed of water and the general formula M20/XSi02 (where M is an alkali metal such as sodium or potassium, and x is 1
- indicates the number of 4.

), and in the present invention, a composition having a solid content, that is, (M20xSi02) of 30 to 70% by weight, is suitably used in coexistence with mountain bark.

The mountain skin used in the present invention is a clay mineral having hydroxyl groups on the surface, and is composed of hydrated magnesium silicate (hydrocarbon silicate).
sepiolite of rousmagnesium silicata, attapulsite of hydrous magnesium aluminum silicate
tapulgjte) (or palygorskite: p
alygorskite).

Commonly known as mountain cork (mount.aincork)
, mountain leather
It is a general term for minerals called mountain wood (nwood), and meerschaum in Japan is also a type of this type of mineral. Such mountain bark may be used in the form of powder, granules or plates. Alternatively, it may be previously dispersed in water and used as an aqueous dispersion. In such a case, the concentration of the aqueous dispersion cannot be determined unconditionally depending on the amount of the fire retardant, but it is preferably about 0.1 to 5% by weight. In the present invention, a fireproofing material containing water glass and mountain bark that can foam to form a fireproof heat insulating layer when heated is applied to the thin metal plate.

The amount can be determined according to the desired fire prevention effect, but in general, one fire prevention board of the product weighs approximately 400 kg to 5 kg.
, preferably 1 kg to 3 kg, and the thickness is 0.3
~4 enemies/skin. When applied to a thin metal plate laminated sheet for the purpose of being a fireproof material that combines water glass and mountain skin that can foam when heated, the fireproofing material may be applied to either the metal surface or the sheet surface, but it cannot be applied directly to the metal surface. Painting is particularly preferred in terms of adhesion and strength of the finished foam fireproofing material. These fireproofing materials can be applied using methods known per se. For example, if the fireproofing material is in liquid or slurry form, it can be applied by manual or powered methods using a brush, roller, trowel, spray, or doctor knife. The fire retardant material is applied to the metal thin plate as described above. The shape of the fire-retardant material applied to the surface of the metal sheet is generally planar, but in some cases it may be uneven, wavy, or discontinuous.

After the fireproofing material is applied to the metal sheet laminated sheet in this manner, the fireproofing material layer is sufficiently dried by a method known per se. The obtained thin metal sheet coated with a fire retardant material is adhered to the fire retardant surfaces, or another thin metal sheet is bonded to the fire retardant surface. Adhesion and bonding methods can be performed by techniques known per se. For example, fireproofing materials that use water glass can be self-adhesive simply by overlapping the surfaces to be bonded together and applying pressure at room temperature, and can be bonded more easily by overfilling. I can do it. In the case where it is difficult to self-adhese the fire-retardant material coated surfaces to each other or the coated surfaces and the metal thin plate lamination sheet by applying pressure at room temperature or heating, the same applies as in the case of laminating the fire-retardant material to the base material surface. If an appropriate amount of adhesive is used, it is possible to sufficiently bond them. In this case as well, pressure may be applied or heating may be applied depending on the characteristics of the adhesive. The sandwich-like foamable fireproofing material made of a sheet laminated with metal plates obtained by the present invention may have its end cross section sealed with an air-impermeable material, if necessary. For example, you can seal with an adhesive or non-porous sealing tape with adhesive (e.g., aluminum foil adhesive tape, etc.). You can extend it to the back side of the thin metal sheet and adhere it with adhesive, or leave the fireproofing material on the edge of the thin metal sheet laminated sheet without applying it from the beginning, and use the uncoated parts of the front and back thin metal sheets to The cross section can also be sealed as described above.An example of the foamable fireproofing material of the present invention obtained in the above manner is shown in FIG.

Furthermore, as a finish for the foamable fireproofing material of the present invention, the outermost layer may be coated with a paint such as vinyl chloride, chlorinated rubber, acrylic, or inorganic, or may be covered with decorative paper, veneer, or the like.

In this case, the aesthetic appearance of the foamable fireproofing material can be enhanced without impairing the foamability during heating, and the strength and durability can be greatly improved. The foamed fireproof board of the present invention obtained in this way has both sides of the fireproofing material sandwiched between thin metal plates that can completely block liquid, gas, and light, so it is free from moisture during storage and use.

There is extremely little deterioration due to oxygen, carbon dioxide, sulfur dioxide, light, etc., and due to the good thermal conductivity of metal, the foamed insulation layer forms evenly when heated, and there is almost no cracking or falling off of the foamed layer. It doesn't happen. Therefore, in the event of a fire,
It can exhibit sufficient fire protection, fire resistance, or heat resistance. Furthermore, it is of sufficient practical value in terms of water resistance, moisture resistance, etc. under constant use. In order to protect combustible materials or materials that are easily deformed by heat from heat such as flames using the foamable fireproofing material of the present invention, the foamable fireproofing material of the present invention can be applied to the surface of the material using a known method. This is done by adhering with adhesive, nailing, hand-fastening, etc., and positioning them in contact. Further, it can also be carried out, for example, by integrally molding the foamable fireproofing material of the present invention when molding fusilastic or the like. EXAMPLES The present invention will be described in more detail below with reference to Examples.

Example To 100 parts by weight of No. 13 water glass liquid (containing 4% by weight as Na20/Si02), No. 3 water glass powder (containing 88% by weight as Nsasa20/Si02), mountain bark and other raw materials They were mixed in the proportions shown in Table 1 to obtain a fire retardant composition.

Each of these was applied to the aluminum surface of aluminum foil laminated paper (aluminum plate thickness: 7 r, paper: 280 m/m) using a trowel at a rate of 2 kg/mt. Then 50℃
It was dried in a hot air dryer until the volatile moisture content (volatile moisture content after drying for 1 hour at 20 mm) became 10 to 20%.
Next, these were cut into 300 x 300 willow squares, and the fire retardant coated sides were stacked together, 110 qo, 0.5 kg.
/ Apply pressure with enemy pressure for 7 seconds to make a sandwich-like 300
A foam fireproof board of x300 x 4 fences was obtained. A rigid urethane sandwich panel with a thickness of 35 mm was made using the obtained foam fireproof board as the front and back surface materials. When the outermost layer of this panel was tested according to the 30-minute fire resistance test of JIS-A-1304, the results shown in Table 1 were obtained. No.
Table 1 Example 2 The following composition was applied to the aluminum foil surface of aluminum foil laminated kraft paper (7 layers of aluminum foil) at a ratio of lk9/m2 and dried.

The coated surfaces were then heated and pressurized for 7 seconds to form a self-adhesive material, and the resulting foam fireproofing material was shaped into a cylinder with an outer diameter of 318 ribs, a thickness of 100 ribs, and a length of 1.9 mm. It was wrapped around the surface of a hard urethane foam and secured with a band at 10 pitch intervals. The degree of damage to the foam was examined when this surface was heated for 10 minutes with the 7-degree blue flame of a Bunsen burner, and the results shown in Table 2 were obtained. Composition 3
No. 3 sodium silicate liquid 10 Ikaribe No. 3 sodium silicate powder 2 Ikaribe Yamapi
2 parts glass fiber 3 legs
0. Part 3 Pentonite Part 5
Table 2 Foam damage test Example 3 The composition of Example 2 was applied to a decorative paper-covered real aluminum board (0
．． 3 side) on the aluminum surface at a rate of 4k9/m, and after drying, on the coated film surface, {a) aluminum foil laminated paper (280 m/m), 'b-aluminum foil laminated kraft paper. (80 evenings/force), {c-aluminum foil laminated polyethylene (5
0 tm/m) were attached using an adhesive (Fer/'-Fel type 50 tm/m) to obtain a foamable fireproofing material.

A hard foam sandwich panel (total thickness: 35 mm) was made using this as an exterior material, and a fire protection test according to JIS-A-1302 was conducted. The results are shown in the table below. Table 3 Example 4 The composition in Example 2 was applied to the paper side of aluminum foil (7K)/polyetch (30K)/kraft paper at a ratio of 2k9/m2, respectively, and dried. Thereafter, the same coated surfaces were bonded to each other using heating and pressing at 110° C. and 1 kg/1 inkstone sand to obtain a 300×300 elevation foam fireproof board.

The cross section of the end of the obtained foam fireproof board was sealed with adhesive-coated aluminum tape as shown in FIG. 1D. For comparison, 150 yen/metal was used instead of aluminum foil laminated paper,
A fireproof board was obtained by the same treatment. These fireproof boards were placed in water at 25:00 and in an atmosphere containing 100% carbon dioxide gas, and then 300 m of hard urethane foam were placed.
/, and a 3-minute fire protection test was conducted in accordance with JIS-A-1302. The results are shown in Table 4. Table 4 Example 5 No. 3 water glass liquid (60% water by weight) No. 3 water glass powder (
Moisture 25%) and mountain bark were mixed well in the proportions shown in Table 5, and each of the resulting compositions 1 to 7 was mixed at 300×
It was applied to 300 Buddha aluminum foil with 300 elevation angle at a rate of 2k9/〆.

Next, after drying at 60 qo until the moisture content is 30%, the coated surfaces are overlapped and 120 qo, 0.2
Pressing was carried out for 7 seconds at a pressure of K9/ground to obtain a foamable fireproofing material sandwiched with aluminum foil on both sides. The green color of the foam fireproof board obtained is
It was sealed with 3mm aluminum adhesive tape as shown in Figure 1D. When this fireproof board was examined for green resistance, carbon dioxide resistance, and fireproof performance, the results shown in Table 6 were obtained. Fifth
Table 6 * Fire retardant performance is determined by adhering each fire retardant material to a 300 x 300 x 35 piece of rigid polyurethane foam with epoxy resin, with the aluminum foil side facing outward, and applying the same 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 300 x 1000 x 300 x 300 x 300 x 1000 x 300 x 300 x 300 x 350 x 300 x 300 x 300 x 300 x 300 x 300 x 3000-glue sheets. JIS-
-A-1302 Fire protection test results obtained by heating the fire protection material from one side.

Experimental Example 1 Experiment No. of Example 1. The composition of the formulation containing mountain bark shown in B and Experiment No. Using two types of fire retardant materials whose compositions were the same as B's formula but excluding the mountain bark, these were applied to aluminum foil laminated paper (aluminum foil 7〆, paper 280㎜/4 kg/〆 on that aluminum surface. .

The applicability, drying properties, and adhesion to aluminum of the fireproofing material thus obtained were investigated, and the following results were obtained. 7th
table

[Brief explanation of the drawing]

Each figure shown in FIG. 1 shows the manufacturing process of the fireproof board according to the present invention using a diagram of its cross-sectional view. The adhesive is shown and the direction of the arrow indicates the order of manufacture. many diagrams many diagrams

Claims (1)

[Claims] 1. Apply a fireproofing material containing water glass and mountain bark that can foam when heated to form a fireproof insulation layer to a thin metal plate, and then glue the sides of the fireproofing material together or laminate the thin metal plate to the fireproofing material side. A method for manufacturing a foam fireproof board characterized by the following.