JPH09136366A - Surface decorating method for moisture absorptive and dischargeable fiber plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a moisture absorptive and dischargeable fiber plate having no color irregularity in external appearance and excellent moisture absorptivity and dischargeability. SOLUTION: Pinholes 2 and cutting grooves 3a, 3b are provided on the surface of a fiber plate base material 1 having moisture absorptivity and dischargeability, air gaps between the fibers is exposed with the atmosphere, and then painted. The grooves 3a, 3b are each formed in a V-shaped groove having 120 deg. or less of crossing angle of vertexes, and the arbitrary grooves 3a, 3b are so provided as to cross with the other cut grooves 3a, 3b. The paint used for painting contains extender, coloring pigment and synthetic resin of aqueous paint in such a manner that the mean particle sizes of the extender and the coloring pigment are 20μm or less.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface makeup method for a moisture absorptive and desorptive fiberboard used as a ceiling panel, a wall panel, etc., and particularly to a surface capable of obtaining a high moisture absorptive and desorptive property even when coated. Regarding makeup method.

[0002]

2. Description of the Related Art Conventionally, fiberboard has a certain amount of moisture absorption and desorption, and the moisture absorption and desorption properties of the fiberboard have been improved to adjust the indoor humidity. It is possible to prevent dew condensation and obtain a comfortable environment.

When these are used as a finishing material for ceilings and walls, coating is indispensable from the viewpoint of cosmetic properties and durability.
However, when a coating film is formed on the surface, it becomes difficult for moisture to permeate, and the moisture absorption / desorption property decreases.

Therefore, there has been a demand for a surface makeup method for a moisture absorptive and desorptive fiber board which can secure a sufficient moisture absorptive and desorptive property even if it is painted.

[0005]

According to the method of claim 1, after coating a fiber board base material (1) having moisture absorption and desorption property, a pin hole (2) and a cutting groove (3a), ( 3b) is provided to expose the fibers and the voids between the fibers to the outside air, and the optional cutting grooves (3a) and (3b) are provided so as to intersect with the other cutting grooves (3a) and (3b). It is characterized by

In this method, even if a coating film is formed on the surface, a pin hole is made with a sharp pin, and a groove is cut with a sharp cutter or router to remove the dense portion of the surface of the coating film and the fiberboard. By removing it, the fibers and the voids between the fibers are exposed to the outside air so that moisture can easily be adsorbed or separated from the water-absorbing substance existing in the fibers and the voids between the fibers.

Further, since any cutting groove is made to cross other cutting grooves without fail, the moisture adsorbed by some cutting grooves can also move to another cutting groove through the crossing portion,
The entire plate is absorbed and released evenly.

In the case of this method, the cutting groove does not have to be a V groove in particular, and may be, for example, a U groove or a trapezoidal groove. The surface must be cut with a sharp edged tool, not with a press.

According to a second aspect of the present invention, a pin hole (2) and cutting grooves (3a) and (3b) are provided on the surface of a fiber board substrate (1) having a moisture absorbing / releasing property so that the fibers and voids between the fibers are exposed to the outside air. It is a method of coating after being exposed to the surface, and the cutting grooves (3a), (3b) are V-grooves having an apex intersection angle of 120 ° or less, and the cutting grooves (3a), (3b)
b) is characterized in that it is provided so as to intersect with other cutting grooves (3a), (3b).

In this method, coating is performed after the pin hole and the cutting groove are provided, but since the cutting groove is a V groove having an apex intersection angle of 120 ° or less, a coating film is hard to be formed on the cutting groove portion. Therefore, even after coating, the state in which the fibers and the voids between the fibers are exposed to the outside air is maintained. Further, as in the case of claim 1, an arbitrary cutting groove intersects with another cutting groove, so that the entire plate material is uniformly absorbed and desorbed.

According to the method of claim 3, in each of the above methods,
The paint used for coating is a water-based paint composed of an extender pigment, a coloring pigment and a synthetic resin, and is characterized in that the extender pigment and the coloring pigment have an average particle diameter of 20 μm or less.

According to this method, since the particle diameters of the extender pigment and the coloring pigment are small, the unevenness of the coating film surface is small, and even if the coating amount of the coating material is small, uneven coating is less likely to occur.
Therefore, the thickness of the coating film can be reduced, the moisture permeability through the coating film is improved, and the moisture absorption / release property as a whole is further improved. Further, since it is a water-based paint, it becomes excellent in moisture absorption and desorption because it remains as fine pores after the diffusion and deposition of water from the inside during drying.

[0013]

[Embodiment]

[Example 1] A raw material was formed into a plate by a usual method and dried to obtain a mineral fiber plate having a thickness of 12 mm. The same mineral fiber board is used in the following Examples and Comparative Examples. This fiberboard
(1) was coated with the vinyl acetate emulsion paint shown in Table 1.

[Table 1] The coating amount is 300 g / m ² . After drying, the maximum direct line is 3
The pin hole (2) was formed by a pin roll of mm, and the V groove (3a) having an apex angle of 72 ° and the V groove (3b) having a vertical angle of 97 ° were formed by a cutter. In addition, (3c) is a wide cutting groove for making one panel look like two panels by design. Each cutting groove (3a), (3b) intersects another cutting groove (3a), (3b).

FIG. 1 is a plan view of the fiber board processed as described above. Moreover, the AA end view in FIG. 1 is shown in FIG.
The BB end view is shown in Fig. 2B, and the cutting grooves (3a), (3b),
An enlarged end view of (3c) is shown in FIG.

[Example 2] After the same pin hole processing and V groove processing as in Example 1, the same coating as in Example 1 was applied.

[Example 3] After the pin hole processing and the V-groove processing similar to those in Example 1 were performed, a coating material having a particle diameter of the extender pigment and the coloring pigment shown in Table 2 was applied. The coating amount is 180g /
m ² .

[Table 2]

[Comparative Example 1] Example 1 was applied to the mineral fiber board (1).
After pressing with a die to emboss and pin hole so as to have a groove configuration similar to that of Example 1, the same paint as in Example 1 was applied in the same amount as in Example 1.

[Comparative Example 2] A mineral fiber board obtained in the same manner as in Example 1 was pressed with a mold so as to have a groove structure similar to that in Example 1, embossed and pin-hole processed,
The same coating material as in Example 1 was applied, but the application amount was 180 g / m ² as in Example 3.

[Moisture Absorption / Desorption Test] Moisture absorption / desorption was measured using each of the above Examples and Comparative Examples. Sample at 25 ℃,
After being left in a 50% humidity control tank for 24 hours, it was left in a humidity control tank at 25 ° C. and 90% for 24 hours to measure the weight change. Table 3 shows the measurement results.

[Table 3]

From the table, it can be seen that all the examples are superior to the comparative example 1 in moisture absorption and desorption. In Comparative Example 2, since the coating film was thin, excellent moisture absorption / release properties were obtained, but irregularities of particles were conspicuous on the appearance and uneven coating occurred. On the other hand, in Example 3, the coating amount was small, but no coating unevenness was observed. This is because the particle diameters of the extender pigment and the coloring pigment of the paint are smaller than those of the conventional paint, and thus a coating film having at least a uniform coating amount can be obtained. In addition, it can be seen that in Example 3, the effect of the coating material is obtained in addition to the effect of the molding method, so that an extremely excellent moisture absorbing / releasing property is obtained.

It is to be noted that, even when the pinholes and V-grooves are applied as in Example 1 after applying the coating material having the fine particle size of the extender pigment and the coloring pigment shown in Table 2 to the fiber board, it depends on the forming method. Due to the effect and the effect of the paint, extremely excellent moisture absorption and desorption can be obtained.

[0022]

As described above, according to the present invention, it is possible to obtain a moisture absorptive and desorptive fiber board which is free from color unevenness in appearance and is excellent in moisture absorptive and desorptive properties.

[Brief description of the drawings]

FIG. 1 is a plan view of a moisture absorptive and desorptive fiber board.

FIG. 2 is an end view of the moisture absorptive and desorptive fiber board.

FIG. 3 is an enlarged end view of a V groove.

[Explanation of symbols]

 (1) Moisture absorbent fiber board (2) Pin hole (3a) V groove (3b) V groove

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display area E04B 1/64 E04B 1/64 D E04C 2/16 E04C 2/16 B

Claims (3)

[Claims] 1. A surface makeup of a moisture absorptive and desorptive fiber board, in which after coating a fiber board base material having a moisture absorptive and desorptive property, a pin hole and a cutting groove are provided on the coated surface to expose the fibers and voids between the fibers to the outside air. A method for making a surface of a moisture absorptive and desorptive fiber board, characterized in that an arbitrary cutting groove is provided so as to intersect with another cutting groove. 2. A surface makeup method for a moisture absorptive and desorptive fiberboard in which pin holes and cutting grooves are provided on the surface of a fiberboard base material having a moisture absorptive and desorptive property to expose fibers and voids between the fibers to the outside air and then coating is performed. Wherein the cutting groove is a V groove having an apex crossing angle of 120 ° or less, and any cutting groove is provided so as to cross another cutting groove. . 3. The paint used for coating is a water-based paint comprising an extender pigment, a coloring pigment and a synthetic resin, and the average particle diameter of the extender pigment and the coloring pigment is 20 μm or less. The surface makeup method of the moisture absorptive and desorptive fiber board according to claim 1 or 2.