JPH11131707A - Fire-resistant sheathing roof board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fire-resistant sheathing roof board excellent in heat- insulation, sound absorption, design, driving of nails, and workability by sticking a rockwool-made sound absorbing board to one side face of an inorganic board constituted of a triple-layer structure of the front and rear layers and the intermediate layer. SOLUTION: Front and rear layers 1, 1 having 0.9 or higher specific gravity and chiefly including mineral fibers, inorganic powder, and a binder are formed. An intermediate layer 2 having a specific gravity of 0.4-0.9 and chiefly including an inorganic foamed body and a binder is provided. And a triple-layer structural inorganic board having a specific gravity of 0.6-0.9 as the whole body is constituted of the front and rear layers 1 and the intermediate layer 2. Then, a sound- absorption board 3 made of rockwool is stuck on a unilateral face of the inorganic board through a vinyl acetate-based adhesive 4 to obtain a fire-resistant sheathing roof board. This fire-resistant sheathing roof board is excellent in not only heat-insulation, sound-absorption, and design, but also it is light and excellent in driving of nails and workability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base plate used mainly for large buildings such as gymnasiums, halls, factories, etc., and more particularly to a base plate excellent in fire resistance, heat insulation, sound absorption and design.

[0002]

2. Description of the Related Art In large buildings such as gymnasiums, halls, factories, and the like, ceiling materials are usually not provided, and construction is often performed with the back surface of a field base plate made of wood chip cement plate or the like exposed. However, if there is no ceiling material, the sound will reverberate indoors, or the outside temperature will be transmitted directly to the room because sufficient insulation cannot be obtained, and the environment will be hot and cold in summer and bad in winter. In addition, when looked up, the appearance was poor, and it was easy for the user to feel uncomfortable.

[0003] In order to solve these problems, a composite board having a rock wool sound-absorbing plate adhered to the back surface of a wood chip cement board or the like is sometimes used. However, the wood chip cement board is heavy and rigid. Poor nailing and workability. In particular, the work was performed on the roof, so the workability was not good.

[0004]

Therefore, there is a need for a fire-resistant ground plate which is excellent in heat insulation, sound absorption and cosmetic properties, lightweight and easy to construct.

[0005]

The refractory base plate of the present invention comprises:
A front and back layer (1) having a specific gravity of not less than 0.9 mainly composed of mineral fibers, an inorganic powder and a binder, and a specific gravity of not less than 0.4 and not more than 0.9 mainly containing an inorganic foam and a binder. A rock wool sound-absorbing plate (3) is adhered to one surface of a three-layered inorganic plate having an overall specific gravity of 0.6 or more and 0.9 or less comprising an intermediate layer (2).

According to this, the weight can be reduced by the middle layer using the inorganic foam. The front and back layers made of mineral fibers and inorganic powders provide the front and back surfaces that are easily elastically deformed despite the relatively high density of specific gravity of 0.9 or more due to the entanglement of the fibers. Hammering,
The nail holding force can be improved, and construction on a curved surface portion is also possible. As a result, it is possible to obtain a field base plate that is lightweight, high-strength and excellent in heat insulation as a whole.

Since the overall specific gravity is 0.6 or more and 0.9 or less, nailing performance is improved. The nailing properties of the inorganic plate are greatly affected by the specific gravity.
In particular, when the nail is nailed at the edge of the plate, the base material crack is easily generated.
If it is less than 0.6, the nail holding force such as the nail head penetration resistance and the nail side surface resistance is greatly reduced, and when a stress is applied, the nail is likely to break at the nailed portion.

The surfaces of both the inorganic plate and the rock wool sound-absorbing plate are substantially smooth, and the peel strength can be prevented by increasing the adhesive strength. The rock wool sound-absorbing plate itself is a material that is lightweight and has excellent fire resistance, heat insulation, sound absorption, and design properties. When combined with an inorganic plate, the rock wool sound-absorbing plate has further excellent strength, workability, and heat insulation. It becomes the main plate.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to preferred embodiments. Example In this example, the front and back layers and the middle layer were first laminated and integrated to produce an inorganic plate having a three-layer structure in which the middle layer was located between the front and back layers.

The front and back layers located on both sides of the inorganic plate include mineral fibers (rock wool, slag wool, mineral wool, etc.), inorganic powders (aluminum hydroxide, calcium carbonate, silica sand, etc.), binders (phenolic resin). , Polyvinyl alcohol resin, starch, etc.) and a binder, and the specific gravity is about 1.0. On the other hand, the middle layer is composed mainly of an inorganic foam (Shirasu foam, pearlite, etc.) and a binder, and a small amount of reinforcing fibers (pulp, polypropylene, polyester, etc.) and inorganic powder are added. It is lower, about 0.55. The laminated inorganic plate had a specific gravity of 0.7 and a thickness of 18 mm as a whole.

Next, a rock wool sound absorbing plate having a specific gravity of 0.40 and a thickness of 9 mm and having a travertine pattern on the surface was adhered to one surface of the inorganic plate using a vinyl acetate adhesive. The specific gravity of the rock wool sound-absorbing plate is 0.35 or more.
45 or less is preferred. The refractory base plate of the present invention thus obtained has a specific gravity of about 0.6 and a thickness of 27 as a whole.
mm.

FIG. 1 is a cross-sectional view showing the structure of a fire-resistant ground plate of an embodiment, wherein (1) is a front and back layer, (2) is a middle layer, (3) is a rock wool sound absorbing plate, and (4) is a vinyl acetate type. Adhesive. Also,
(3a) is a travertine-shaped concave portion provided on the surface of the rock wool sound absorbing plate. When constructed using this embodiment, a rock wool sound-absorbing plate can be seen from the interior of a gymnasium or the like, and the design and sound-absorbing properties are further enhanced if a travertine pattern or the like is provided on the surface.

[Comparative Example] For comparison, a plate material which has been conventionally sold as a field board and has been used has been prepared. This is a 12 mm thick hard wood chip cement board with a thickness of 18 mm.
Has a specific gravity of 0.81 and a thickness of 30 mm.

[Comparative Test] The above Examples and Comparative Examples were measured for heat insulation (JIS A1420), sound absorption (JIS A1409), nailing, and water absorption dimensional change (according to JIS A5430). Table 1 shows the test results.

[0015]

[Table 1]

The specific gravity of the embodiment and that of the comparative example are significantly different.
And the comparative example is 40 kg / sheet. For this reason, it can be seen that the embodiment is lighter by 30% or more with the same size and easy to handle.

The average sound absorption coefficient (NRC) is 250, 50
It is the arithmetic mean of the sound absorption coefficients at 0, 1000, and 2000 Hz. The average sound absorption coefficient of the embodiment is slightly better than that of the conventional example.
Thermal resistance was almost the same.

Regarding nailing, about 10 m from the edge of the plate
The nail was nailed at the position of m, and the appearance was judged. In the examples, nails could be easily driven, and no crack was observed on the plate. On the other hand, in the comparative example, nailing was difficult due to the rigidity of the plate, and cracks frequently occurred in the plate even when the nail was driven. It can be seen from the weight and the workability that the working example is easier to perform than the comparative example.

Further, since the embodiment has an excellent water absorption dimensional change rate, it is suitable as a field plate exposed to a severe natural environment such as a rise in roof temperature due to direct sunlight, a severe temperature difference in summer and winter, and a hardness level in the rainy season. .

As described above, in comparison with the comparative example which has a track record in performance as a commercial product, the embodiment can obtain the same or better performance, and has a weight reduction of 30% or more and good workability. ing.

In the embodiment, the semi-combustible material and the roof 30 are used.
We conducted a test of the refractory structure and confirmed that it met the standards for certification.

[0022]

As described above, according to the present invention, it is possible to provide a fire resistant base plate which is excellent in heat insulating property, sound absorbing property, design property, lightweight, nailing property and workability.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a structure of a fireproof base plate of the present invention.

[Explanation of symbols]

 (1) Front and back layers (2) Middle layer (3) Rock wool sound absorbing plate

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI E04B 1/94 E04B 1/94 R

Claims (1)

[Claims] 1. A front and back layer mainly composed of mineral fibers, an inorganic powder and a binder and having a specific gravity of 0.9 or more, and a specific gravity mainly composed of an inorganic foam and a binder of 0.4 or more and 0.9. A fire-resistant base plate comprising a three-layered inorganic plate having an overall specific gravity of 0.6 or more and 0.9 or less including one of the following middle layers, and a rock wool sound-absorbing plate attached to one surface of the inorganic plate.