JPH0860793A - Ceiling material - Google Patents

Abstract

PURPOSE: To attain excellent fire-resistant performance by laminating a nonflammably processed wooden material on the back face of a rock wool sound insulating board to form a ceiling material. CONSTITUTION: A wooden material 2 is laminated on the back face of a rock wool sound insulating board 1 to form a ceiling material, the specific gravity of the rock wool sound isolating board l is set to 0.3-0.5, and the thickness of the wooden material is set to 0.6-6mm. For the method to nonflammably process the wooden material 2, the wooden material 2 is separately impregnated with chemicals containing anion and cation generating water-insoluble nonflammable inorganic materials when they react, and a nonflammably processed wooden material containing insoluble nonflammable inorganic materials in the wooden material 2 is obtained. The warp at the time of execution is reduced, and the execution can be simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling material. More specifically, the present invention relates to a new ceiling material that is useful in non-residential fields, housing complexes, public facilities, and other living spaces, has excellent fire resistance, and has reduced deflection.

[0002]

2. Description of the Related Art Conventionally, rock wool sound absorbing boards have been used as building materials for ceilings. This material is a lightweight interior material for ceilings, which has excellent sound absorption, heat insulation, workability, and design. Further, it is a material having a quasi non-combustible or non-combustible property also in fireproof property, and is a material that is often used especially in the non-residential field where there is fireproof regulation.

[0003]

Regarding building materials such as interiors and ceiling materials, approval standards for quasi-fire resistant structures corresponding to ministerial ordinances, etc., of houses with quasi-fire resistant structures, etc. have been established. In reality, this standard is met by using two 9 mm gypsum board materials. On the other hand, when using rock wool board to obtain the same fire resistance, a thickness of 20 mm or more was required. Therefore, even though the current product thickness is 15 mm at maximum, it has been required to reduce the thickness in terms of manufacturing and cost.

On the other hand, while this rock wool board is lightweight, it has a low bending rigidity, so that it easily bends,
At present, the unit size is 1 × 2 shaku to a maximum of 2 × 4 shaku. In particular, in the discarding and pasting method, a size of 1 × 2 is generally used, and a size larger than that causes bending, so that the size is limited. Further, in the case of construction, since application of an adhesive and joining such as tacker fastening of the peripheral portion are performed, it takes time and effort at the time of construction.

The present invention has been made in view of the above circumstances, solves the drawbacks of the conventional rock wool board, is easy to install, and uses a rock wool board having a thickness of 15 mm or less, The objective is to provide a new ceiling material that has fire resistance capable of clearing the approval standards for quasi-fire resistant structures that correspond to the existing ministerial ordinances, and that also suppresses deflection and has good workability.

[0006]

In order to solve the above problems, the present invention provides a ceiling material characterized in that a wood material is laminated on the back surface of a rock wool sound absorbing plate. Furthermore, according to the present invention, the specific gravity of the rock wool sound absorbing plate is 0.3-
The preferred embodiment is that the thickness is 0.5, the thickness of the wood material on the back side is 0.6 to 6 mm, the wood material is flame-retarded, and the wood material contains an insoluble incombustible inorganic material. As well.

[0007]

In the ceiling material of the present invention, as shown in FIG. 1 for example, the wood material (2) is attached to the back surface of the rock wool sound absorbing plate (1) to improve the fire resistance and reduce the deflection. The unit size has been expanded to improve nail retention and ease of construction.

It is considered that the improvement of the fire resistance performance is due to an increase in the heat capacity of the board and a decrease in the thermal conductivity in the thickness direction. In other words, the temperature rise on the back side is suppressed, and as a result,
Fire resistance is improved compared to rock wool sound absorbing plate alone. In this way, by laminating the wood material on the back surface of the rock wool sound absorbing board, even if the thickness of the rock wool sound absorbing board is 20 mm or less, which is conventionally required, fire resistance performance satisfying the ministerial ordinance quasi fire resistant structure standard can be obtained.

Of course, the presence of the wood portion on the back side makes it impossible to obtain incombustibility, but provides semi-incombustible performance. However, if the thickness of the wood portion becomes thicker or the thickness of the rock wool becomes thinner, the semi-incombustible performance cannot be obtained. Therefore, in the present invention, as illustrated in FIG. 2, by using the wood material as the flame-retardant treated wood material (3), it is possible to obtain quasi-noncombustible fire resistance without being limited by the thickness of the wood material. it can. By subjecting the wood part to flame-retardant treatment, it is possible to reduce the thickness of the entire sound absorbing plate as compared with the case where no treatment is performed. That is, for the rock wool board having the same thickness, the thickness of the wood material can be reduced, or if the wood material has the same thickness, the thickness of the rock wool sound absorbing plate can be reduced.

There are no particular restrictions on the method of flame-retardant treatment, the chemicals used, and the chemical content. For example, as a general method, pressure-and-pressure impregnation of a solution of a flame-retardant treatment agent, dipping, coating, spraying, or application of a fire-preventive paint can be mentioned, and the chemical agent is not particularly limited. For example, monoammonium phosphate, diammonium phosphate, sodium phosphate, sodium polyphosphate, melamine phosphate, guanidine phosphate and the like are used. As another flame retardant treatment method, a method of containing an insoluble noncombustible inorganic substance in a wood material by separately impregnating a chemical containing an anion and a cation that react to generate a noncombustible inorganic substance insoluble in water But it's okay.

According to the present invention, by sticking a wood material to the back surface of the rock wool sound absorbing plate, it is possible to increase the rigidity of the entire board and reduce the flexure while maintaining the design on the front surface side. As a result, it becomes possible to increase the unit size, which has always been limited in the past. For example, it is also possible to use in a size of 2 × 6 to 3 × 8.

The present invention also has the advantage that the holding power of the nail is increased by the fact that there is a wood material on the back surface. Therefore, if it is a rock wool board, you can also use pin nails with small nail heads,
It is also possible to make the surface of the nail part inconspicuous in terms of design. Alternatively, in the case of construction by discarding and pasting, at present, both adhesive and tacker are used, but since the nail holding power increases, it is possible to construct with only tacker fastening, which simplifies construction. realizable.

The wood material may be in the form of a single veneer or a laminated material such as plywood, laminated wood, particle board, fiber board, etc. The kind of wood material is not particularly limited. Its thickness is preferably about 0.6 to 6 mm. If it is too thin, the effect of suppressing deflection cannot be obtained and workability is not improved. On the other hand, if it is too thick, the fire resistance will be poor. And more preferably, the thickness is 1 to 4 mm
It is a degree.

Further, regarding the rock wool sound absorbing plate,
Considering its production, the specific gravity is preferably 0.3 to 0.5.
Further, from the viewpoint of fireproofness, an inorganic substance having a flame retardant effect may be added inside. For example, Al (OH) ₃ , calcium silicate and the like can be mentioned. It is desirable that the thickness be 20 mm or less. Considering cost and manufacturing aspects, it is 7-1.
It is 8 mm, more preferably about 9 to 16 mm. Further, the surface of rock wool can be painted or processed with a design property as in the case of conventional ceiling materials. And the method is not particularly limited.

The present invention will be described in detail below with reference to examples.

[0016]

Example 1 A lauan plywood 3 mm material was laminated and adhered to a rock wool sound absorbing board having a thickness of 15 mm to obtain a ceiling material having a specific gravity of 0.39 and a size of 2 × 6 scale. Then, the workability of the ceiling material obtained in this example, the deflection during the work, the fire resistance, and the quasi-noncombustible performance were evaluated.

As shown in Table 1, the ceiling board obtained in this example can be installed by tacker fastening, and the maximum deflection during installation was less than 1 mm. The fire resistance was also good. Example 2 Lauan MDF 3 mm material was laminated and adhered to a rock wool sound absorbing board having a thickness of 12 mm to obtain a ceiling material having a specific gravity of 0.40 and a size of 2 × 8 scale. Then, the workability of the ceiling material obtained in this example, the deflection during the work, the fire resistance, and the quasi-noncombustible performance were evaluated.

As shown in Table 1, the ceiling plate obtained in this example can be tacked, and the maximum deflection at the time of working was less than 1 mm. The fire resistance was also good. Example 3 As an anion-containing drug, as a flame-retardant treatment method in which a chemical containing an anion and a cation that react to produce a water-insoluble non-combustible inorganic substance is separately contained to produce an insoluble non-combustible inorganic substance in wood. 2 ammonium hydrogen phosphate +
2 mm wood plywood was treated with ammonium borate and barium chloride as the cation containing agent. Then, it was dried to obtain a flame-retardant treated wood impregnated with an inorganic content of 50 wt%. This is laminated and adhered to a rock wool board 9mm, and the specific gravity is
At 0.44, a 2 x 8 shaku size ceiling material was obtained. Then, the workability, the deflection during work, and the fire resistance of the ceiling material obtained in this example were evaluated.

The ceiling plate obtained in this example can be installed by tacker as shown in Table 1, and the maximum deflection during installation was less than 1 mm. The fire resistance was also good. Example 4 Flame Retardant Treatment Wood plywood (2 mm) was treated with ammonium borate as a flame retardant treatment method for infiltrating a chemical solution. Then, it was dried to obtain a flame-retardant treated wood impregnated with an inorganic substance content of 30 wt%. This was laminated and adhered to a rock wool board 12 mm to obtain a ceiling material having a specific gravity of 0.41 and a size of 2 × 6 scale. Then, the workability, the deflection during the work, and the fire resistance of the ceiling material obtained in this example were evaluated.

The ceiling plate obtained in this example can be installed by tacker fastening as shown in Table 1, and the maximum deflection during installation was less than 1 mm. The fire resistance was also good. Example 5 Flame Retardant Treatment In a flame retardant treatment method in which a chemical solution is infiltrated,
Wood veneer 1 mm was treated with ammonium phosphate + boric acid as a flame retardant agent. Then, it was dried to obtain a flame-retardant treated wood impregnated with an inorganic substance content of 30 wt%. this,
Laminated and bonded to 15 mm rock wool board, specific gravity 0.39, 3 x 8
A shaku-sized ceiling material was obtained. Then, the workability, deflection during work, and fire resistance of the ceiling material obtained in this example were evaluated.

As shown in Table 1, the ceiling board obtained in this example can be installed by tacker fastening, and the maximum deflection during installation was less than 1 mm. The fire resistance was also good. Example 6 Flame-retardant treatment As a flame-retardant treatment method of permeating a chemical solution, guanidine phosphate was used to treat 3 mm of wood plywood. afterwards,
A flame-retardant treated wood impregnated with an inorganic content of 20 wt% was obtained by drying. This is laminated and adhered to a rock wool board 12mm,
A ceiling material with a specific gravity of 0.42 and a size of 3 × 6 was obtained. Then, the workability, the deflection during the work, and the fire resistance of the ceiling material obtained in this example were evaluated.

As shown in Table 1, the ceiling plate obtained in this example can be installed by tacker fastening, and the maximum deflection during installation was less than 1 mm. The fire resistance was also good. Comparative Example 1 A rock wool board having a specific gravity of 0.37, a size of 2 × 8 and a thickness of 12 mm was evaluated for workability, deflection during work, fire resistance and quasi-noncombustibility. Although this rock wool board can be tacked, it has a deflection of 1 mm or more and is not sufficiently fire-resistant. Comparative Example 2 The workability, the deflection during the work, the fire resistance and the quasi-noncombustible performance when two gypsum boards of 3 × 6 shank size and 9 mm thickness were stacked were examined. It was found that this gypsum board could not be installed by tacker fastening, and the workability was not good. On the other hand, the deflection during construction was less than 1 mm, and it was confirmed that fire resistance was obtained.

[0023]

[Table 1]

[0024]

As described in detail above, according to the present invention, a rock wool board having a thickness of 15 mm or less can be used for tacker fastening, has less deflection during construction, and is quasi-fireproof corresponding to existing ministerial ordinances. Provided is a ceiling material having fire resistance that can meet the structural approval regulations.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a ceiling material of the present invention.

FIG. 2 is a perspective view showing an example in which the wood part of the ceiling material of the present invention is flame-retarded.

[Explanation of symbols]

 1 Rock wool sound absorbing board 2 Wood material 3 Flame-retardant wood material

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication location E04B 1/86 V (72) Inventor Etsuro Otsuki 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works Ltd. (72) Inventor Go Nagata 1048, Kadoma, Kadoma-shi, Osaka Prefecture Matsushita Electric Works, Ltd.

Claims (5)

[Claims] 1. A ceiling material comprising a wooden material laminated on the back surface of a rock wool sound absorbing plate. 2. The ceiling material according to claim 1, wherein the rock wool sound absorbing plate has a specific gravity of 0.3 to 0.5. 3. The ceiling material according to claim 1, wherein the backside wood material has a thickness of 0.6 to 6 mm. 4. The ceiling material according to claim 1, wherein the wood material is flame-retarded. 5. The ceiling material according to claim 1 or 4, wherein the wood material contains an insoluble incombustible inorganic material.