JPS6215399A - Production of colored mineral fiber molded body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 type of surface coating, the surface of the fiberboard is coated with paint, which reduces the sound absorption properties that mineral fiberboard has. If this is done, there is a problem in that the surface condition of the fiberboard is different, causing a sense of discomfort with the colored layer on the surface, and the cosmetic properties are significantly reduced.

Another possibility is to color the mineral fibers and then mold them, but since it is difficult to color the entire fiber evenly and uniformly, even if the disadvantages 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.

(41111 hat 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 is to knead mineral fibers with an appropriate amount of water to produce a kneaded product in which mineral fiber granules 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 Embodiments) To explain the specific embodiments of the present invention, mineral fibers such as rock wool and slag wool are used as main materials, and appropriate aggregates, waste paper valves, and thickeners are added as needed. A suitable amount of a binder such as starch and an appropriate amount of water are added and kneaded. At this time, by kneading while adjusting the moisture content, the fibers are gathered together to form a few millimeters.
A kneaded material consisting of a large number of granules with a size of about 0 mm is obtained.

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 crosstalk, the colorant dyes the granules, but since the granules are fibers bundled together in water, even if the outer layer is uniformly colored, the colorant will not penetrate into the center. First, the center part is an uncolored part. however,
It is not necessary to form such uncolored areas in all granules, but the purpose can be sufficiently achieved if they are formed in granules having a size larger than a certain window.

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, a mineral fiberboard with high strength, such as a wet-processed fiberboard, is used to prevent warping during drying and to exhibit heat insulation and sound absorption properties. It is preferable to use a mineral fiber mat in a wet state as the substrate, and if a wet mineral fiber mat is used as the substrate, the drying process can be performed in one step.

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 at the center is exposed on the surface. As a result, the uncolored portions appear to be scattered substantially uniformly over the entire surface, and a natural moth-eaten recessed pattern called a trapartine 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 trapachine pattern.

Figure 1 shows a colored mineral fiberboard obtained by the above method, where (1) shows the main fiberboard, (2) shows the uncolored part exposed on the surface, and (3) shows the so-called trapartine pattern. The worm-eaten concave pattern (4) is a small-diameter pore formed by air bubbles. FIG. 2 shows a colored mineral fiberboard (1) 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, after adding a coloring agent to this kneaded product, the kneaded product is kneaded again to almost uniformly color each of the granules of the kneaded product, and then the colored kneaded product is formed into an appropriate shape, dried, and then the surface is ground. Because of this characteristic, it is possible to obtain a molded product that is uniformly colored even inside, and even after cutting or machining, it always has the same appearance as the surface, and therefore, it is suitable for various machining processes. It is possible to provide a molded article having a beautiful decorative surface that does not cause a sense of discomfort in color even when subjected to coloring.

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. It has a 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 the drawing]

The drawings show a mineral fiberboard obtained by the manufacturing method of the present invention. Figure 1 is a perspective view of the colored mineral fiberboard, and Figure 2 is an enlarged view of the mineral fiberboard with the mineral fiber board integrated on its lower surface. FIG. (1)...Colored mineral fiberboard main body, (2)...Uncolored portion, (3)...Concave pattern, (4)...Void, (5
)...Mineral fiber substrate.

Claims (3)

[Claims] (1) Mineral fibers are mixed 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 form each granule of the kneaded product. A method for producing a colored mineral fiber molded article, which comprises coloring the body substantially uniformly, then molding the colored kneaded material into an appropriate shape, drying, and then grinding the surface. (2) A 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. .