JPH0155220B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing a colored mineral fiber molded article having an appearance in which many uncolored parts are scattered over the entire surface.

(Prior art and its problems) Conventionally, wet papermaking methods and paste methods have been known as methods for manufacturing mineral fiber molded bodies, such as mineral fiberboards, but in both cases, colored minerals are In order to obtain quality fiberboard, a method is adopted in which the surface of the fiberboard is coated with a paint of an appropriate color after the fiberboard is formed.

However, with this kind of surface coating,
The surface of the fiberboard is coated with paint, which reduces the sound absorption properties that mineral fiberboard has.
Further, when the fiberboard is subjected to groove processing or cutting processing, there is a problem that the surface condition of the fiberboard is different, so that the colored layer on the surface feels uncomfortable, and the cosmetic properties are significantly reduced.

Another option is to color the mineral fibers and then mold them, but it is difficult to color the entire fiber evenly and uniformly, so even if the drawbacks of painting are improved, the color unevenness is noticeable and the cosmetic quality is poor. The problem is that it is inferior to

(Objective of the Invention) The present invention has been made in view of the above problems, and even if the inside of the molded object is uniformly colored and the inside of the molded object is exposed by cutting or machining, it will not be the same as the surface. To provide a method for producing a colored mineral fiber molded article that has a good appearance, does not impede sound absorption properties, and exhibits good cosmetic properties without conspicuous color unevenness due to a large number of uncolored parts scattered on the exposed surface. It is something to do.

(Structure of the Invention) In order to achieve the above object, the method for producing a colored mineral fiber molded article according to the present invention involves kneading mineral fibers with an appropriate amount of water to produce a kneaded product in which granules of mineral fibers are aggregated. Then, after adding a coloring agent to this kneaded product, it is kneaded again to color each granule of the kneaded product almost uniformly.Then, the colored kneaded product is formed into an appropriate shape, dried, and then the surface is It is characterized by grinding.

(Explanation of Examples) To explain the specific examples of the present invention, mineral fibers such as rock wool and slag wool are used as main materials, and appropriate aggregates, waste paper pulp, and thickening agents are added as needed. etc., and further add an appropriate amount of a binder such as starch and an appropriate amount of water and knead. At this time, by kneading while adjusting the moisture content, the fibers are bundled to obtain a kneaded product consisting of a large number of granules with a size of several millimeters to about 10 millimeters.

Next, a coloring agent is added to the kneaded material, and the kneaded material is kneaded again so that all the granules are uniformly colored.

During this kneading, the coloring agent dyes the granules, but since the granules are fibers bundled together in water, even if the outer layer is uniformly colored, the colorant does not penetrate into the center. First, the center part is an uncolored part. However, such uncolored areas do not need to be formed in all granules, and the purpose can be sufficiently achieved if they are formed in granules of a certain size or more.

Note that as the colorant, a water-soluble dye or a pigment with good water dispersibility is used.

The colored kneaded material, which is an aggregate of colored granular materials thus colored, is put into an appropriate mold, molded, and dried.

This molding may be performed by molding only the colored kneaded material, but it may also be molded at the same time so as to be integrated with a plate-like material or other appropriate substrate.

In this case, when forming the mineral fiberboard, it is possible to eliminate warping during drying, and to improve heat insulation and
For the purpose of exhibiting sound absorption properties, it is preferable to use a mineral fiberboard with high strength, such as a wet paper-made fiberboard, as the substrate.Moreover, if a wet mineral fiber mat is used as the substrate,
The drying process can be done in one go.

After drying, the surface of the thus obtained colored mineral fiber molded body is ground, and by this grinding, the granules protruding from the surface are partially ground away, and the uncolored part in the center is brought to the surface. As a result of exposure, the uncolored portions appear to be scattered substantially uniformly over the entire surface, and a natural moth-eaten recessed pattern called a travertine pattern consisting of voids between grains appears on the surface.

In addition, when obtaining a kneaded material consisting of an aggregate of granular colored materials, if a blowing agent is added to include air bubbles between the granular materials, a large number of pores will be scattered and distributed on the surface of the resulting molded material. It is possible to form an even better travertine pattern.

Figure 1 shows a colored mineral fiberboard obtained by the above-mentioned method, where 1 indicates the main body of the fiberboard, 2 the uncolored part exposed on the surface, and 3 a moth-eaten pattern called a travertine pattern. The concave pattern 4 is a small diameter hole obtained by air bubbles. Further, FIG. 2 shows a colored mineral fiberboard 1 which is integrally layered on the surface of a mineral fiberboard 5 obtained by wet papermaking.

(Effects of the Invention) As described above, according to the method for producing a colored mineral fiber molded body according to the present invention, mineral fibers are kneaded with an appropriate amount of water to obtain a kneaded product in which granules of mineral fibers are aggregated, Next, a coloring agent is added to this kneaded product, and then kneaded again to color each granule of the kneaded product almost uniformly,
After that, the colored kneaded material is molded into an appropriate shape,
Because it is characterized by grinding the surface after drying, it is possible to obtain a molded object that is evenly colored inside, and even after cutting or machining, it always has the same appearance as the surface. Therefore, it is possible to provide a molded article having a beautiful decorative surface that does not cause any discomfort in color even when subjected to various machining processes.

Furthermore, by grinding, the inside of the granular colored body is exposed in a scattered state on the surface, making it possible to obtain a decorative surface rich in natural modeling, and even if uneven coloring occurs, the unevenness will not be noticeable and will not change easily. It has a rich design effect.

Furthermore, when used for sound-absorbing boards, heat-insulating boards, etc., there is no need for a painting process, which can improve productivity, and since there is no surface coating, it can effectively demonstrate its sound-absorbing properties. .

[Brief explanation of drawings]

The drawings show a mineral fiberboard obtained by the manufacturing method of the present invention. Figure 1 is a perspective view of a colored mineral fiberboard, and Figure 2 is a state in which a mineral fiber board is integrated on the lower surface of the colored mineral fiberboard. FIG. 1... Colored mineral fiber board main body, 2... Uncolored portion, 3... Concave pattern, 4... Holes, 5... Mineral fiber board.

Claims (1)

[Claims] 1. Mineral fibers are kneaded with an appropriate amount of water to obtain a kneaded product in which granules of mineral fibers are aggregated, and then a coloring agent is added to this kneaded product, and then kneaded again to obtain a kneaded product. A method for producing a colored mineral fiber molded article, which comprises coloring each of the granules substantially uniformly, then molding the colored kneaded material into an appropriate shape, drying it, and then grinding the surface. 2. The method for producing a colored mineral fiber molded article according to claim 1, characterized in that the molded article is obtained only from a colored kneaded material. 3. A method for producing a colored mineral fiber molded article according to claim 1, which comprises laminating and molding a colored kneaded material on an arbitrary substrate to obtain a molded article integrated with the substrate.