JPH076239B2 - Makeup sound absorbing board - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cosmetic sound absorbing board having a novel decorative surface on the surface of which a crack pattern and voids due to the opening of foam-like air bubbles are combined.

[Prior art and its problems]

Conventionally, various types of decorative sound absorbing boards used for ceiling boards and the like have been used, and a travertine made of natural stone is artificially created by pin holes etc. mainly on a sound absorbing board substrate made of inorganic fiber such as rock wool. Many of them are provided with a concave pattern close to the pattern, but the pattern is artificial and has low makeup value.

On the other hand, there is known a method, for example, in Japanese Patent Publication No. Sho 63-17945, in which a crack pattern such as the travertine pattern does not depend on pin holes and the voids of the fiber mass are irregularly exposed to show a natural wind. Since the surface of the decorative board by the above method is mainly formed of aggregates of fiber lumps of inorganic fibers, it has a fibrous appearance, and the surface pattern shows crack patterns dispersed. However, the pattern was inevitably monotonous, and there was a limit to the design that could appear.

There is also a stone-like appearance in which natural stone, silica sand, or other particulate matter is adhered to the surface of the substrate with an adhesive agent, but this is because the stone particles are simply attached, so the particulate matter easily falls off. In addition, since the surface is a hard stone granular layer, if the surface is smoothed by sanding etc., it will fall before the stone is cut and the substrate will be exposed, so the natural appearance will not look like natural stone was cut out and the surface will be granular It was rough and had little change, and nailing was difficult. In addition, since the uneven surface is formed only by the attachment of the aggregate, the sound absorbing property is poor and it is difficult to use in a portion requiring sound absorbing performance such as a ceiling material.

On the other hand, in the rock wool sound absorbing plate, inorganic lightweight aggregate such as pearlite may be mixed for papermaking in order to reduce the weight, but a small diameter of 1 mm or less for dispersibility and strength retention during papermaking. Therefore, even if the mixing amount is increased, the surface appearance cannot be significantly changed, which causes the strength to be decreased, and at the same time, only a small amount of the binder is retained in the inter-fiber voids of the papermaking board. Therefore, there is a problem that it may fall off due to surface cutting such as sanding and become a vacant space, and it has only tended to deteriorate the cosmetic properties.

〔Purpose〕

The present invention has been made in view of the problems of the conventional example, and the purpose thereof is to provide a natural crack pattern and fine voids of a foam lump, which is excellent in the appearance of a conventional sound absorbing decorative board having only a crack pattern. The present invention provides a sound-absorption decorative board that exhibits a variety of makeup surfaces that are complexly combined.

[Means for solving problems]

In order to solve the above-mentioned problems of the conventional example, the present invention provides a first
In the section 1, the surface of the plate-shaped substrate (1) has a fiber lump (2) of inorganic fibers and a large number of bubble-like fine voids inside, and has a particle size of 5
A sound absorbing layer (4), which is a mixture of a plurality of inorganic foamed masses (3) of ˜15 mm, is integrally provided with an appropriate thickness, and a fiber mass (2) of inorganic fibers is formed on the surface of the sound absorbing layer (4). A crack-shaped sound absorbing hole (5) having an open space between them and a fine sound void inside the inorganic foamed mass (3) reveals a foamy sound absorbing hole (6) opened by cutting or the like.

In the second paragraph, the inorganic foam lump (3) is provided with a recess in which a part of fine voids are excavated and removed, and the inorganic foam lump remaining on the inner surface of the recess (7) is adopted in the second section. The foam-like sound absorbing holes (6) due to the fine voids of (3) are exposed.

Is adopted as a technical means.

[Function] Inorganic foam having a large particle size of 5 to 15 mm and a fine void like a bubble with the fiber lump (2) of inorganic fibers bonded to the surface of the plate-like substrate (1) with a binder Since the sound absorbing layer (4) is provided on the plate-like base material (1) by mixing the lump (3),
The strength is retained by the plate-shaped base material (1) so that there is no chipping or breakage, and the inorganic foam lump (3) having a large particle size is surrounded by a lump of inorganic fibers. Since it is fixed on the surface of the plate-shaped substrate (1), the foamed mass (3)
There is no dropout.

In addition, the gaps between the fiber lumps (2) of the inorganic fibers appear on the surface by irregular cracks (5), and between the fiber lumps (2), fine bubbles like fine particles inside the inorganic foam lumps (3) are formed. Since the collection of voids is open, the surface has the appearance as if it was cut out of a travertine pattern in which different kinds of mineral masses were embedded, and cracks due to the gaps in the fiber masses (3). The sound absorbing holes (5) and the foam sound absorbing holes (6) that open the inside of the foamed mass (3) are combined to form a porous appearance on the entire surface and the sound absorbing property is not impaired.

Moreover, since the above-mentioned inorganic foam lump (3) has a large diameter of 5 to 15 mm and the inside thereof is composed of a collection of foam-like fine voids, a crack-shaped sound absorbing hole due to the gap of the fiber lump (2). (5) and the foam-like sound absorbing holes (6) of the foam-like minute voids are not confused with each other, and the mixture of different kinds of lumps can be clearly discerned by the naked eye.

Moreover, since the periphery of the inorganic foam lump (3) is formed by the fiber lump (2) in which the inorganic fibers are bonded by the binder,
The entire surface has the texture of an inorganic material. By adjusting the mixing amount and dispersion state of the inorganic foam lump (3), it is possible to make it look like a natural stone in which different stone materials are mixed in the travertine pattern. Also, by dispersing the foamed mass, it is possible to give a completely new appearance unlike the conventional stone pattern.

In addition, since the inside of the inorganic foam lump (3) is a collection of fine voids, it is possible to attach a colorant to the opened voids to give various colors, and to express a new color. Is also possible.

Further, such an inorganic foam lump (3) can be cut like the fiber lump (2) of the inorganic fiber to expose the inside because the inside is brittle due to foamy voids. It is possible to change the thickness and further to form a tile joint cutting groove on the surface, and the conventional method of surface processing of the rock wool sound absorbing plate can be applied. Further, it is also possible to add a rib-like cutting pattern or the like and combine it with an uneven surface to further enhance the cosmetic properties.

Further, as in the second aspect of the claim, by partially excavating and removing the inside of the foamed mass (3) to form the recess (7), the sound absorbing area is increased to enhance the sound absorbing property and the natural stone is cut out. Since the concave portion (7) appears as if the internal void at that time appeared, the appearance becomes more natural. At this time, the kind and amount of the binder of the fiber lump (2) are adjusted to make the fiber lump (2) hard so as not to be removed by excavation inside the foam lump (3).

Excavation of the foamed mass (3) can be performed by, for example, a so-called shot blasting method in which black shaving with a wire brush or the like, small-diameter steel balls or high-hardness mineral grains are sprayed or collided for excavation.

Since the sound absorbing layer (4) is integrally provided on the plate-shaped substrate in any of the sound absorbing boards of any of the claims, a large crack (5) or a lump (3) is formed in the sound absorbing layer (4). Even if mixed, the strength is retained by the plate-shaped base material (1), and there is no breakage or chipping during handling, and the plate-shaped base material (1) is formed with an appropriate bonding portion such as actual processing. can do.

Further, if an inorganic fiber board made of paper made of inorganic fibers is used as the plate-shaped base material (1), the overall fire resistance is enhanced.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. Rock wool is dispersed together with a binder in a large amount of water, and this is made up by a round net type wet paper making machine to form a uniform papermaking rock wool board. Of course, the present invention is not limited to this, but in the present embodiment, this is used as the plate-shaped base (1).

Next, rock wool and starch are kneaded with a little water to form a fiber lump (2) in which fibers are collected in a lump, and the lump rock wool fiber lump (2) has an obsidian particle size of 5 to 15 mm. The foamed mass (3) is added and kneaded to such an extent that the fiber mass (2) is not broken.

The obsidian foamed lump (3) has a specific gravity of about 0.1, which is produced by burning obsidian powder to generate CO ₂ gas and generating a large number of foamy bubbles inside.

The foamed mass (3) is an inorganic foamed mass whose inside is a collection of foam-like microscopic voids and has a machinability equivalent to that of the bonded body of the rockwool fiber mass (2). Well, the raw material and forming means are not specified. For example, in addition to obsidian foam, pearlite foam, vermiculite foam, or expanded shale, expanded clay called expanded clay that has a large specific gravity of about 0.1 and has a large particle size Can be used.

The particle size of the foamed lump (3) is 5 mm or more in order to make the aggregate of voids inside the foamed lump appear in a mottled pattern, but any size smaller than this may be used. 5 is the easiest to mix and the appearance is preferable.
It is preferable to use a mixture of ~ 12 mm. If the foamed mass (3) exceeds 15 mm, it becomes difficult to receive the mixture (8) prepared on the surface of the plate-shaped substrate (1) in an appropriate thickness (5 to 15 mm) to smooth the surface. , 5 to 15 mm is preferable.

It should be noted that a large foam lump with a particle size exceeding 15 mm, for example, a diameter of 20 mm
If it is a foamed lump, the above substantial size may be used by making it substantially 15 mm or less.

An example of the composition of the present invention is as follows.

When the kneading of the rock wool fiber lump (2) and the inorganic foam lump (3) is completed, the mixture (8) is received on the upper surface of the rock wool papermaking plate (1) with a thickness of 5 to 15 mm to smooth the surface and then dried. To do.

The large-sized inorganic foam lump (3) may be removed from the fiber lump (2) and then pressed to be embedded in the fiber lump (2).

Next, the upper surface of the mixture layer (8) formed on the rockwool papermaking plate (1) is cut and removed until the inside of the foam lump (3) is exposed, whereby the foam shape inside the foam lump (3) is obtained. And the crack-like gaps (5) of the fiber lump (2) of rock wool are opened to provide a sound absorbing and decorative surface.

At this time, since the foamed mass (3) is fixed between the fiber masses (2) with the binder contained in the fiber masses (2), it does not fall off even by cutting with a sander or the like. In addition, since the inside is a foamy foam which is soft and brittle, it is uniformly and easily shaved to reveal the lumps of the foamy sound absorbing holes (6). afterwards,
If necessary, the surface is appropriately coated to obtain a decorative sound absorbing board.

When a rock wool mat in a wet state is used as the plate-shaped substrate (1), the wet mat acts as a cushioning material when the surface of the mixture layer (8) is smoothed by pressing the foamed mass (3). (3) is preferable because it does not crack.

〔effect〕

The present invention, as described above, has a particle size of 5 to 15 mm on the surface of the plate-shaped substrate.
Since a plurality of inorganic foamed lumps of No. 3 are mixed in the fiber lumps of inorganic fibers and provided in a layered form, it is possible to fix the large sized inorganic foamed lumps without causing a decrease in strength due to the presence of the plate-shaped substrate. , A new appearance in which the crack pattern of the fiber lump and the foamy void due to the foam lump are combined. Moreover, a crack-shaped sound absorbing hole due to the opening of the gap of the fiber mass and a foam sound absorbing hole in which foamy microscopic voids inside the foamed mass are opened to provide sufficient sound absorption. Further, by excavating a part of the inside of the foamed mass to form a recess, a complicated recessed pattern in which the recessed portion due to the crack of the fiber mass and the recessed portion due to the excavation of the foamed mass are combined to have a high sound absorbing property. A decorative sound absorbing board having a rough surface is obtained.

[Brief description of drawings]

FIG. 1 ... Schematic front view showing a manufacturing state of the present invention, FIG. 2 ... Perspective view of a first embodiment of the present invention, FIG. 3 ... Cross-sectional view of FIG. 2, FIG. Sectional drawing of 2nd Example of invention, (1) ...... plate-shaped base material, (2) ...... fiber mass, (3) ...... inorganic foamed mass, (4) ... sound absorption layer, (5). Crack-shaped sound-absorbing holes, (6) ... Bubble-like sound-absorbing holes, (7) ... Recesses, (8) ...
…blend.

Claims (2)

[Claims] 1. A plate-like base material having a fiber mass of inorganic fibers on the surface and a large number of fine voids inside, and having a particle size of 5 to 15 mm.
A sound absorbing layer formed by mixing a plurality of inorganic foam lumps of a suitable thickness and integrally formed, and a crack-shaped sound absorbing hole in which a gap between fiber lumps of inorganic fibers is opened on the surface of the sound absorbing layer, and the inorganic material A cosmetic sound absorbing board, characterized in that fine voids inside a foamed block expose foamy sound absorbing holes opened by cutting or the like. 2. A concave portion in which a part of the fine void is excavated and removed is formed on the surface of the inorganic foam lump, and a foam-like sound absorbing hole is formed on the inner surface of the concave portion by the fine void of the inorganic foam lump. The makeup sound absorbing board according to claim 1.