JP2001062954A - Gypsum board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve fire resistance, water resistance and sound insulation and to give a magnetic or electromagnetic shielding effect by covering both surfaces of a platelike body made of a gypsum with metal thin plates. SOLUTION: Both surfaces of a platelike body 2 are covered with metal thin plates 3, 3. The body 2 is made of a calcined gypsum similar to that of the body of a core material of the gypsum board. The board 1 is frequently used by cutting the board 1 at a building site by a cutting knife. In such a case, a thickness of the each plate 3 which can be cut by the knife is desirably about 30 to 100 μm. As the plate 3, a plated steel sheet of zinc or the like or a colored steel sheet is preferably used, but except the steel sheet, an aluminum plate, copper plate, stainless steel plate or the like may be sometimes used. A method for manufacturing the gypsum board comprises, for example, the steps of adding water or another to a calcined gypsum, kneading the mixture, casting the kneaded mixture between two metal thin plates, setting the mixture to a predetermined thickness by rollers, curing the mixture and then drying the mixture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gypsum board used for a ceiling material, a wall material, a partition and the like of a building.

[0002]

2. Description of the Related Art Gypsum boards conventionally used are:
Gypsum is used as a core material, and both sides are covered with paper and molded into a plate shape. This gypsum board has fire protection, sound insulation,
Gypsum, which has dimensional stability and can be easily obtained as a by-product of a chemical factory, is low in cost and highly evaluated among interior base materials.

[0003]

However, in the conventional gypsum board, since the board surface is covered with paper, if the paper burns in the event of a fire or gets wet with water, it forms a plate-shaped main body. There was a problem that the plaster collapsed and the shape could not be maintained. The present invention has been made in view of such a point, and by coating a board surface with a thin metal plate, it is possible to improve fire resistance, water resistance, and sound insulation, and to provide a magnetic shielding effect and an electromagnetic shielding effect. An object of the present invention is to provide a gypsum board capable of exhibiting the above.

[0004]

A gypsum board according to the first aspect of the present invention is characterized in that a plate-shaped main body 2 made of gypsum is covered with a metal thin plate 3 on each side.

[0005] The gypsum board of the invention according to claim 2 is characterized in that one surface of the plate-shaped main body 2 made of gypsum is covered with a thin metal plate 3 and the other surface of the plate-shaped main body 2 is covered with paper 4. I do.

A gypsum board according to a third aspect of the present invention is characterized in that both surfaces of a plate-like main body 2 made of gypsum are covered with papers 4 respectively, and a thin metal plate 3 is adhered to an outer surface of each paper 4. .

In the gypsum board according to any one of claims 1 to 3, the thickness of each of the thin metal plates 3 is about 30 to 100 μm.
m.

[0008]

FIG. 1 shows a gypsum board 1 according to the present invention. The gypsum board 1 has a plate-shaped main body 2 made of gypsum, and a metal covering both surfaces of the plate-shaped main body 2. It is formed by the thin plates 3 and 3. This gypsum board 1
As an example of the dimensions of, a thickness of about 10 mm and a width of 900
mm and the length is 1800 mm.

The plate-shaped main body 2 is made of calcined gypsum similar to the plate-shaped main body which is a core material of a conventionally used gypsum board, and an appropriate fibrous material may be mixed into the calcined gypsum. Each thin metal plate 3 is made of a steel plate (iron plate) having a thickness of about 60 μm, and is preferably a plated steel plate coated with zinc or the like or a colored steel plate coated with a color. May be. In the case of a plated steel sheet, the thickness of the plated layer is about 7 to 10 μm, and thus the thickness of the steel sheet itself is about 50 μm.

As the thin metal plate 3, a steel plate (iron plate) is usually used as described above.
An aluminum plate, a copper plate, a stainless plate, or the like may be used.

This gypsum board 1 is often used at a building site by cutting a required portion of the board with a cutter knife in accordance with the dimensions of the construction site. In such a case, a steel plate ( Iron plate) thickness is 1
The limit is about 00 μm. Therefore, from the point of cutting the gypsum board 1 by the cutter knife, the metal thin plate 3,
3 needs to be 100 μm or less. On the other hand, the thickness of the steel plate (iron plate) is too thin, for example, 30
When the thickness is less than μm, the strength of the thin steel sheet is weakened, the steel sheet is easily broken, and the manufacture of the thin steel sheet itself becomes very difficult.

In view of the above circumstances, each metal sheet 3
Is preferably about 30 to 100 μm.

In manufacturing the gypsum board 1, for example, water and the like are added to calcined gypsum and kneaded into a paste.
The gypsum board 1 can be manufactured by pouring the kneaded material between two thin metal plates, hardening to a fixed thickness with a roller, drying, and cutting to a predetermined length.

According to the gypsum board 1 as described above, since the metal thin plates 3 are attached to both surfaces of the plate-shaped main body 2 made of gypsum, the fire resistance of the gypsum board 1 is improved by the metal thin plates 3. Water resistance and sound insulation can be remarkably improved as compared with the conventional gypsum board. In addition, since the thin metal plate 3 is made of a steel plate (iron plate), the magnetic shielding property and the electromagnetic shielding property can exert an effect of preventing leakage of a magnetic field to the outside and entry of a magnetic field from the outside.

FIG. 2 shows another gypsum board 11 according to the present invention.
The gypsum board 11 is composed of a plate-shaped main body 2 made of gypsum, a thin metal plate 3 covering one surface of the plate-shaped main body 2, and a paper 4 covering the other surface of the plate-shaped main body 2. It was formed.

The paper 4 covering the other surface of the plate-shaped main body 2 is
It is made of the same paperboard as the board base paper used for the conventional gypsum board. The plate-shaped main body 2 and the thin metal plate 3 are the same as those of the gypsum board 1 shown in FIG.

In order to manufacture the gypsum board 11, similarly to the case of the gypsum board 1, a paste-like kneaded product obtained by adding water and the like to calcined gypsum is poured between a thin metal plate and a paperboard, After curing to a certain thickness, drying and cutting to a predetermined length may be performed.

The gypsum board 11 has a plate-shaped main body 2 made of gypsum covered with a thin metal plate 3 on one side and a paper 4 on the other side. On one side, fire resistance, water resistance and sound insulation can be greatly improved. Further, since the thin metal plate 3 is made of a steel plate (iron plate), a magnetic shielding effect and an electromagnetic shielding effect can be exhibited.

FIG. 3 shows still another gypsum board 21 according to the present invention. The gypsum board 21 is composed of a plate-shaped main body 2 made of gypsum and a paper 4 covering both surfaces of the plate-shaped main body 2. , 4 and a metal sheet 3 adhered to the outer surface of each paper 4. The plate-shaped main body 2, the thin metal plate 3 and the paper 4 of the gypsum board 21 are the same as those of the gypsum boards 1 and 11.

An example of a method for manufacturing the gypsum board 21 is as follows. A paste-like kneaded product obtained by adding water and the like to the plaster of Paris as described above is poured between two paperboards.
After curing to a constant thickness with a roller and drying, a thin metal plate is adhered to a paperboard on both sides of the plate-like body with an adhesive, and cut into a predetermined length. As this adhesive, an adhesive suitable for bonding to a metal plate and paper, such as an epoxy resin-based, neoprene-based or nitrile rubber-based adhesive, may be used.

According to the gypsum board 21 as described above, since both surfaces of the plate-shaped main body 2 are covered with the paper 4 and the thin metal plate 3 is adhered to the outer surface of each paper 4, Similar to the above, fire resistance, water resistance and sound insulation can be remarkably improved as compared with the conventional gypsum board, and since the metal thin plate 3 is made of a steel plate (iron plate), a magnetic shielding effect and an electromagnetic shielding effect can be exhibited. Since the plate-shaped main body 2 is covered with the paper 4 on both sides, the shape retention of the plate-shaped main body 2 is further improved, and it becomes more robust. Further, since the thin metal plate 3 is bonded to the paper 4, the adhesiveness is good and the manufacturing is easy as compared with the case where the thin metal plate 3 is directly bonded to the plate-shaped main body 2 made of gypsum.

[0022]

According to the gypsum board according to the first aspect of the present invention, since a thin metal plate in place of the conventional paper is attached to both sides of the plate-shaped main body made of gypsum, compared with the conventional gypsum board. Since the fire resistance and water resistance are remarkably improved, and especially the gypsum board does not collapse for a long time in a fire or the like, and the sound insulation is also improved, it is most suitable for a partition or the like.

When the metal thin plate is made of a steel plate (iron plate), the magnetic shielding property and the electromagnetic shielding property exert an effect of preventing leakage of a magnetic field to the outside and entry of a magnetic field from the outside. be able to.

According to the gypsum board of the second aspect of the present invention, one surface of the plate-shaped main body made of gypsum is covered with a thin metal plate, and the other surface of the plate-shaped main body is covered with paper. On the side, fire resistance, water resistance and sound insulation can be greatly improved. When the metal sheet is made of a steel plate (iron plate), a magnetic shielding effect and an electromagnetic shielding effect can be exhibited.

According to the gypsum board of the third aspect of the present invention, fire resistance, water resistance and sound insulation are remarkably improved as compared with the conventional gypsum board. And metal sheet is steel plate (iron plate)
In the case of comprising, a magnetic shielding effect and an electromagnetic shielding effect can be exhibited. And since both sides of a plate-shaped main body are covered with paper, the shape retention of a plate-shaped main body becomes more favorable and becomes tough. Further, since the metal sheet is adhered to the paper, the adhesiveness is good and the production becomes easy as compared with the case where the sheet metal is directly adhered to the plate-shaped main body made of gypsum.

By setting the thickness of the metal sheet to about 30 to 100 μm as in the gypsum board of the invention according to claim 4, the strength of the metal sheet is maintained, and the metal sheet does not easily break. Further, the gypsum board can be easily cut by a cutter knife or the like.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a gypsum board according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a gypsum board according to another embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a gypsum board of still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gypsum board 2 Plate-shaped main body made of gypsum 3 Metal sheet 4 Paper 11 Gypsum board 21 Gypsum board

 ──────────────────────────────────────────────────の Continued on the front page F-term (reference) 2E001 DA01 DE01 DH01 FA03 FA07 FA14 GA12 GA42 HA03 HB02 HB03 HB04 HB05 HC07 LA04 2E162 CA16 CB02 CB03 CB05 CB07 CB08 CB10 CC06 4F100 AB01B AB01C AB03 AE06A AK27G29 AK27G29 AK27G29 AK27GAK AN02G BA03 BA05 BA06 BA10B BA10C BA13 CB01 CB02 DG03 DG10C DG10D DG10E EH71 GB08 JB07 JD08 JH01 JJ07 JK06 JL01 JL04 YY00B YY00C

Claims (4)

[Claims] 1. A gypsum board characterized in that both surfaces of a gypsum plate-shaped main body are respectively covered with a thin metal plate. 2. A gypsum board, wherein one surface of a plate-shaped main body made of gypsum is covered with a thin metal plate, and the other surface of the plate-shaped main body is covered with paper. 3. A gypsum board, wherein both sides of a gypsum plate-shaped main body are covered with paper, and a thin metal plate is adhered to an outer surface of each paper. 4. The thin metal sheet has a thickness of about 30 to 100 μm.
The gypsum board according to any one of claims 1 to 3, wherein m is m.