JPH10147994A - Fire-resistant sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire-resistant sheet easily forming a fire-resistant cover layer by sandwiching a core material with a surface material and a back face material, binding at least a graphite component and inorganic fibers with a synthetic resin to form the surface material and back face material, and forming the core material with aluminum hydroxide powder. SOLUTION: Acore material 3 is sandwiched by a surface material 1 and a back face material 2 to form a fire-resistant sheet A. A graphite component and inorganic fibers are bound by a phenol resin to form the surface material 1 and back face material 2. When heat is applied to the graphite component, it is carbonized to form a heat insulating layer hindering the conduction of heat. The heat-resistant sheet A is provided with strength and flexibility by the inorganic fibers. The phenol resin functions as a binder. The core material 3 is made of aluminum hydroxide powder, and it releases crystal water under high heat to cool the surrounding. When the fire-resistant sheet is formed at a weak section for the fire-resistant performance and fireproof performance, the weak section can be easily reinforced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention covers an outer peripheral surface of a steel material used for a building or a building requiring a fire-resistant structure,
The present invention relates to a fireproof sheet interposed in a core material for improving the fire resistance of a sandwich panel.

[0002]

2. Description of the Related Art Conventionally, a building made of a steel material used for a building or a building requiring a fire-resistant structure is generally made to have a fire-resistant structure by spraying rock wool on site after forming the structure. Was. In addition, a method of adding a fire retardant has been adopted to improve the fire resistance of the sandwich panel.

[0003]

However, in the above method, the operation of spraying rock wool is dangerous.
The operation was in a dirty and harsh 3K environment, and considerable skill was required to form a uniform layer of rock wool. In addition, there was a danger that it would deteriorate with time, peel off and drop. In addition, equipment for spraying is required on site, and costs such as transportation costs are required. Further, the fireproof rock wool is not sheet-shaped, and cannot be accurately formed in a layered shape on a core material such as a panel.

[0004]

According to the present invention, in order to eliminate such disadvantages, a core material is sandwiched between a surface material and a back material, and the surface material and the back material are made of at least a graphite component and inorganic fibers. It is made of synthetic resin bound, and the core material is a fire-resistant sheet made of aluminum hydroxide powder, eliminating the need for spraying rock wool on construction sites. A fire-resistant coating layer can be integrally formed on the outer surface of steel, or between the face material of a building panel and the core material, or inside, and a stable heat-insulating fire-resistant layer with a constant thickness can be formed. It is intended to provide a fire-resistant sheet having fire resistance.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a fireproof sheet according to the present invention. FIG. 1 is a partially cutaway perspective view showing a typical example of the refractory sheet A. FIG. 2 is a cross-sectional view of the refractory sheet A. It is a sheet-like object of any shape in which the material 3 is sandwiched into a composite shape.

The composition of the front surface material 1 and the back surface material 2 is as follows:
It consists of a graphite component and inorganic fibers bound with a phenolic resin. The graphite component is made of, for example, a carbon compound such as graphite (expandable or non-expandable) or carbon black, and when heated, carbonizes to form a heat insulating layer and hinder heat conduction. The graphite component is about 50 to 80 of the weight ratio of the entire surface material 1 and back material 2.
%.

[0007] Examples of the inorganic fibers include a heat-resistant inorganic compound such as glass fiber, ceramic fiber, rock wool, and asbestos. It has the function of giving flexibility (handling). The inorganic fibers occupy about 5% to 20% of the weight ratio of the front surface material 1 and the back surface material 2.

The phenolic resin functions as a binder between the graphite component and the inorganic fiber, and has high fire resistance and fire resistance. Further, by binding the graphite component and the inorganic fiber with a synthetic resin phenol resin, the refractory sheet A has flexibility,
Plasticity and elasticity are taken into account, and the refractory sheet A can be wound and formed into a coil shape, and is very easy to handle. The phenol resin accounts for about 10% to 30% of the weight ratio of the front surface material 1 and the back surface material 2.

The core 3 is made of aluminum hydroxide powder 4. The aluminum hydroxide 4 is powdery or granular and has a size of about 10 to 1000 μm, and releases water of crystallization under high heat to cool the surroundings.

FIG. 3 is a partially cutaway perspective view showing an end portion of the refractory sheet A in an enlarged manner. That is, the core material 3 is prevented from leaking to the outside by directly laminating and bonding the end portion of the refractory sheet A to the front surface material 1 and the back surface material 2. At this time, the surface material 1 and the back surface material 2 are bonded by using self-adhesive property such as heat fusion or by using a separate adhesive.

FIGS. 4 and 5 are explanatory views showing examples of use of the fireproof sheet A. FIG. 4 is a partially cutaway perspective view showing a building panel B in which the fireproof sheet A is actually interposed. is there. The building panel B is composed of a phenol foam, a panel surface material 5 and a panel back material 6 made of a non-combustible steel plate.
It is a long plate-shaped composite plate in which a highly fire-resistant panel core material 7 such as rock wool, glass wool, ceramic wool, or inorganic foam plate is sandwiched, and a refractory sheet A is interposed in the middle of the panel core material 7. It is. Of course, the refractory sheet A can be interposed at the boundary between the panel core member 7 and the panel surface member 5.

In FIG. 4, the connection portion of the building panel B is filled with an inorganic board 8 and a fire-resistant packing 9 for further improving fire resistance.

FIGS. 5A and 5B show a structure in which a refractory sheet A is adhered to the outer periphery of a steel structure material C such as an H-shaped steel material or a lip grooved steel material. At this time, sticking is done separately with adhesive (not shown)
Or a tape in which an adhesive layer and release paper are provided on one side of the refractory sheet A in advance, so that sticking can be easily performed.

[0014]

Other Embodiments The above is a typical embodiment of the fireproof sheet according to the present invention, and a fireproof sheet A as shown in FIGS. 6 and 7 can be used. That is, FIG. 6 shows an example of the fire-resistant sheet A in which two or more layers of the surface material 1, the core material 3, and the back material 2 are laminated.

FIG. 7 shows another example of the front surface material 1 and the back surface material 2. FIG.
FIG. 7B shows an example in which inorganic fibers 11 are mixed to improve the strength.

[0016]

As described above, according to the fire-resistant sheet according to the present invention, the weak point can be easily reinforced by forming it at the weak point of the fire resistance and the fire prevention performance. Since it is formed in a sheet shape, it can be freely bonded to the surface to be adhered, and the workability is excellent. It has good waterproofing, weathering and chemical resistance, and does not deteriorate heat insulation and fire protection. In normal times, it functions as a cushioning material, an isolating material, a reinforcing material, a waterproofing material, etc., forms a non-combustible fire-resistant foamed heat-insulating layer as described above under high heat, and fires a structural panel, steel material, etc. for 30 minutes, 60 minutes.
Minute (1 hour), 120 minutes (2 hours), etc. There are features and effects such as.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a typical example of a fireproof sheet according to the present invention.

FIG. 2 is a sectional view of the refractory sheet used in FIG.

FIG. 3 is a partially cutaway perspective view showing an enlarged end portion of the refractory sheet used in FIG. 1;

FIG. 4 is an explanatory view showing a usage example of a fireproof sheet.

FIG. 5 is an explanatory diagram showing a usage example of a fireproof sheet.

FIG. 6 is an explanatory view showing another example of the fireproof sheet.

FIG. 7 is an explanatory view showing another example of the fireproof sheet.

[Explanation of symbols]

 Reference Signs List A Fireproof sheet B Building panel C Steel structure material 1 Surface material 2 Back material 3 Core material 4 Aluminum hydroxide powder 5 Panel surface material 6 Panel back material 7 Panel core material 8 Inorganic board 9 Fireproof packing 10 Through hole 11 Fiber

Claims (1)

[Claims] A core material is sandwiched between a surface material and a back material, and the surface material and the back material are formed by binding at least a graphite component and an inorganic fiber with a synthetic resin. A fire-resistant sheet, wherein the core material is made of aluminum hydroxide powder.