JP2013076215A - Decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce manufacturing cost and secure deodorization effects.SOLUTION: On a porous base material 3, multiple depressed cavities 7 are formed that open on the front face side. On the front face of the porous base material 3, a coating film 5 is applied and formed that has a water dispersion resin as a main component and contains a filler. In the coating film 5, a penetration cavity 9 smaller than the depressed cavity 7 of the porous base material 3 and penetrating the coating film 5 is formed to communicate with the depressed cavity 7.

Description

  The present invention relates to a decorative board having excellent deodorizing properties.

  In recent years, there has been a growing demand for improvements in living spaces and living environments, and interior building materials that have been deodorized, antibacterial, and protected by various methods have been proposed.

  For example, Patent Document 1 discloses a technique for exerting a deodorizing / antibacterial / antifungal effect for a long period of time by adding an inorganic silver antibacterial agent to a fibrous board.

  Patent Document 2 discloses a technique for deodorizing indoor aldehydes by attaching a deodorant mixed layer made of a synthetic resin containing a deodorant to the surface of the topcoat layer of the flooring. Has been.

JP 2004-338353 A JP 2008-156876 A

  However, in Patent Document 1, since the fibrous board is hot-press molded with the antibacterial agent added, an expensive antibacterial agent having heat resistance is required. Moreover, since the antibacterial agent adheres not only to the board surface but also to the fibers inside the board, the consumption of the antibacterial agent increases. Therefore, in the said patent document 1, manufacturing cost increases.

  On the other hand, in Patent Document 2, since the deodorant mixed layer is formed on the surface of the flooring, the use of the flooring may cause the deodorant to peel off with the synthetic resin and lose the deodorizing effect. Further, since the deodorant is covered with the resin, the deodorizing effect obtained with the same amount of the deodorant is lower than when the deodorant is exposed. Therefore, in order to obtain a sufficient deodorizing effect, a large amount of deodorant and antibacterial agent are required, resulting in an increase in manufacturing cost.

  This invention is made | formed in view of this point, and the place made into the objective is to acquire the deodorizing effect reliably while reducing manufacturing cost.

  In order to achieve the above object, the present invention is characterized in that the odor can be efficiently confined inside the base material over a long period of time.

  Specifically, the present invention has taken the following solutions.

  That is, the first invention is a porous base material in which a large number of recessed voids opened on the surface side are formed, and is applied and formed on the surface of the porous base material. And the coating film is formed so that a through-hole that penetrates the coating film is smaller than the recessed space of the porous substrate and communicates with the recessed space. And

  According to a second invention, in the decorative board of the first invention, the apparent density of the coating film is higher than the apparent density of the porous substrate.

  A third invention is characterized in that, in the decorative board of the second invention, the apparent density of the coating film is 10 to 15 times the apparent density of the porous substrate.

  According to a fourth invention, in the decorative board according to any one of the first to third inventions, the coating film contains an antibacterial and antifungal agent.

  According to the first aspect of the present invention, the recessed void of the porous substrate and the through-hole of the coating film communicate with each other to form a so-called ink bottle structure. It is taken into the recessed space through the through space. Since the through space is formed smaller than the recessed space, the once taken-in odor is hardly diffused to the outside. Therefore, a deodorizing effect can be obtained without using an expensive deodorant or antibacterial agent, and the manufacturing cost can be reduced.

  Moreover, even if the coating film is peeled off due to the use of the decorative board, the recessed voids of the porous substrate are exposed to the outside and take in odor, so that the deodorizing effect can be obtained with certainty.

  According to the second invention, since the apparent density of the coating film is higher than the apparent density of the porous substrate, a through space smaller than the recessed space is likely to be formed. In addition, since there is a density difference between the coating film and the porous substrate, the odor physically adsorbed on the coating film is taken in, and it is easy to diffuse and adsorb into the recessed voids of the porous substrate. Therefore, the above deodorizing effect can be obtained with great reliability.

  According to the third invention, the apparent density of the coating film is 10 times or more of the apparent density of the porous substrate, and the density difference between the coating film and the porous substrate is large. Is taken in and easily diffused and adsorbed in the recessed space of the porous substrate.

  Moreover, if the apparent density of the coating film is too high, the penetration gap of the coating film becomes small and odors are not taken into the recessed gap, and the deodorizing effect is reduced. On the other hand, even if the apparent density of the porous substrate is too low, the concave voids are connected, the area of the inner wall surface (specific surface area) of the concave voids is reduced, and the odor adsorbed on the inner wall surface is reduced, resulting in a deodorizing effect. Is reduced. However, according to the third invention, the apparent density of the coating film does not exceed 15 times the apparent density of the porous base material. The reduction of the deodorizing effect can be prevented.

  According to the fourth invention, since the coating film contains the antibacterial / antifungal agent, the antibacterial / antifungal effect is further enhanced.

(A) is sectional drawing of the decorative board which concerns on embodiment of this invention, (b) is the A section enlarged view of (a).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Fig.1 (a) shows the plate-shaped ceiling material 1 as a decorative board which concerns on embodiment of this invention. The ceiling material 1 includes a plate-like porous base material 3. This porous substrate 3 is a fiber board manufactured by intertwining fibers 3a such as rock wool, glass fiber, ceramic fiber, wood fiber and the like, and molding using a binder 3b, and its apparent density is 0 It is set to about 1 to 0.4 g / cm ³ . As the binder 3b, a natural resin or a synthetic resin that uniformly disperses and exhibits a bonding force is used. Between the fibers 3a of the porous base material 3, etc., as shown in FIG. 1 (b), a large number of recessed voids 7 opened to the surface side are formed. The porous substrate 3 may be a gypsum board that has been reduced in density by mixing a foaming agent with gypsum, or a board that has been reduced in density by generating fibrous zonotlite using calcium silicate as a raw material. Good. Further, a reinforcing thin paper may be attached to the back surface of the porous substrate 3.

  On the surface of the porous substrate 3, a coating film 5 containing a water-dispersed resin as a main component and containing a filler and an antibacterial / antifungal agent is applied and formed. Between the resins of the coating film 5, between the resin and the filler, and between the fillers, as shown in FIG. 1 (b), it is smaller than the recessed gap 7 of the porous substrate 3. A through gap 9 penetrating the coating film 5 is formed to communicate with the recessed gap 7. As the water-dispersible resin, vinyl acetate resin, acrylic resin, urethane resin, or a mixture of these resins, and as the filler, inorganic fillers such as calcium carbonate, titanium oxide, glass powder, shirasu balloon, pearlite can be used. . Content of the said filler is set to 20 to 60 weight%. The coating film 5 may further contain a color pigment.

The coating amount of the coating film 5 is set to 50 to 300 g / m ² . The thickness of the coating film 5 is set to 50 to 200 μm (desirably about 50 to 100 μm). The apparent density of the coating film 5 is about 2.5 to 4 g / cm ³ , and is set to be 10 to 15 times the apparent density of the porous substrate 3.

  The antibacterial and antifungal agents contained in the coating film 5 are copper ions, isothiazolines such as 2, octyl, 4, isothiazoline, 3 and on, triazine, pyridine, pyrithione, organic copper, and inorganic. Or a combination thereof. The addition amount of the antibacterial / antifungal agent is set to about 0.5 to 5% by weight based on 5 weight of the coating film.

  When the ceiling material 1 configured as described above is disposed on the ceiling of a nursing care health facility, a hospital, a welfare facility, a house, etc., the recessed space 7 of the porous substrate 3 and the through space of the coating film 5 9 communicates with each other to form a so-called ink bottle structure, so that the indoor odor is adsorbed on the surface of the coating film 5 and the odor concentration is lower than that in the through-hole 9 of the coating film 5. 7 is taken in through the through-hole 9 and the odor concentration in the room is lowered. Since the through space 9 is formed smaller than the recessed space 7, the once taken-in odor is hardly diffused to the outside. Therefore, a deodorizing effect can be obtained without using an expensive deodorant or antibacterial agent, and the manufacturing cost can be reduced.

  Moreover, since the apparent density of the coating film 5 is higher than the apparent density of the porous substrate 3, the through void 9 smaller than the recessed void 7 is easily formed. Further, since there is a density difference between the coating film 5 and the porous substrate 3, the odor physically adsorbed on the coating film 5 is taken in and easily diffused and adsorbed in the recessed void 7 of the porous substrate 3. Therefore, the above deodorizing effect can be obtained with great reliability.

  Moreover, since the coating film 5 contains an antibacterial / antifungal agent, the antibacterial / antifungal effect is further enhanced.

  In addition, since the apparent density of the coating film 5 is 10 times or more of the apparent density of the porous substrate 3 and the density difference between the coating film 5 and the porous substrate 3 is large, the odor physically adsorbed on the coating film 5 is present. It is taken in and easily diffuses into the recessed void 7 of the porous substrate 3. In addition, the apparent density of the coating film 5 is set to 15 times or less of the apparent density of the porous substrate 3 when the apparent density of the coating film 5 exceeds 15 times the apparent density of the porous substrate 3. When the apparent density of the film 5 becomes too high, the through-holes 9 of the coating film 5 become small and odors cannot be taken into the recessed gaps 7, or the apparent density of the porous substrate 3 becomes too low, resulting This is because the gap 7 is connected, the area (specific surface area) of the inner wall surface of the recessed gap 7 is reduced, and the odor adsorbed on the inner wall surface is reduced.

  In order to demonstrate the above, experimental examples (Examples 1 to 4 and Comparative Examples 1 to 3) are given below.

In Examples 1 to 4, the coating amount of the coating film 5 is 160 g / m by applying a vinyl acetate resin paint with calcium carbonate as a filler to the surface of the rock wool sound absorbing plate as the porous substrate 3. ^2. A ceiling material 1 was obtained in which the thickness of the porous substrate 3, the overall apparent density, the apparent density of the porous substrate 3, and the apparent density of the coating film 5 were set as shown in Table 1 below. . Then, the obtained ceiling material 1 is cut into a 100 mm square, and an aluminum foil is pasted on the end and back of the ceiling material 1 as a test piece. After the test piece is sealed in a 5 L Tedlar (registered trademark) bag, 5 L is put into the bag. Air was sealed, and the bag was vaporized by injecting acetic acid into the bag using a microsyringe so that the inside of the bag would be 8.5 ppm. Then, the concentration of acetic acid after 2 hours was measured with a detector tube.

  In Comparative Examples 1 to 3, a rock wool sound-absorbing plate having a thickness of about 9 mm and an apparent density set as shown in Table 1 below was cut into 100 mm squares without applying a vinyl acetate resin paint. And the thing which stuck aluminum foil on the back was made into the test piece, and the same measurement as Examples 1-4 was performed.

<Example 1>
By the above-described method, the thickness of the porous substrate 3 is 9 mm, the overall apparent density is 0.32 g / cm ³ , the apparent density of the porous substrate 3 is 0.27 g / m ² , and the apparent density of the coating film 5 is A ceiling material 1 of 3.9 g / cm ³ was obtained.

  And when the above-mentioned measurement was performed, the concentration of acetic acid measured was 0.3 ppm.

<Example 2>
By the above-mentioned method, the thickness of the porous substrate 3 is about 9 mm, the overall apparent density is 0.36 g / cm ³ , the apparent density of the porous substrate 3 is 0.32 g / m ² , and the apparent density of the coating film 5 The ceiling material 1 of 4.2 g / cm ³ was obtained.

  And when the above-mentioned measurement was performed, the concentration of acetic acid measured was 0.6 ppm.

<Example 3>
By the above-mentioned method, the thickness of the porous substrate 3 is about 9 mm, the overall apparent density is 0.45 g / cm ³ , the apparent density of the porous substrate 3 is 0.41 g / m ² , and the apparent density of the coating film 5 The ceiling material 1 of 3.8 g / cm ³ was obtained.

  And when the above-mentioned measurement was performed, the concentration of acetic acid measured was 0.9 ppm.

<Example 4>
By the above-mentioned method, the thickness of the porous substrate 3 is about 6 mm, the overall apparent density is 0.58 g / cm ³ , the apparent density of the porous substrate 3 is 0.51 g / m ² , and the apparent density of the coating film 5 The ceiling material 1 of 4.2 g / cm ³ was obtained.

  And when the above-mentioned measurement was performed, the concentration of acetic acid measured was 1.3 ppm.

<Comparative Example 1>
When the above measurement was performed on a rock wool sound absorbing plate having an apparent density of 0.32 g / cm ³ , the measured concentration of acetic acid was 1.3 ppm.

<Comparative example 2>
When the above-mentioned measurement was performed on a rock wool sound absorbing plate having an apparent density of 0.36 g / cm ³ , the measured concentration of acetic acid was 1.0 ppm.

<Comparative Example 3>
When the above measurement was performed on a rock wool sound absorbing plate having an apparent density of 0.45 g / cm ³ , the measured concentration of acetic acid was 1.0 ppm.

  As a result of the experiment, in Examples 1 and 2, a higher odor reduction effect was recognized compared to Examples 3 and 4. Moreover, in Example 1, the high odor reduction effect was recognized compared with the comparative example 1 with the same base material density, and in Example 2, the high odor reduction effect was recognized compared with the comparative example 2 with the same base material density. In Example 3, a higher odor reduction effect was observed compared to Comparative Example 3 having the same base material density.

  The present invention is useful as a decorative board having excellent deodorizing properties.

1 Ceiling material (decorative board)
3 Porous base material 5 Paint film 7 Recessed cavity 9 Through-hole

Claims (4)

A porous substrate on which a number of recessed voids that are open on the surface side are formed;
A coating formed on the surface of the porous substrate, comprising a water-dispersed resin as a main component and containing a filler;
A decorative board, wherein the coating film is formed so that a through-hole passing through the coating film is smaller than a recessed space of the porous base material and communicates with the recessed space. The decorative board according to claim 1,
A decorative board, wherein the apparent density of the coating film is higher than the apparent density of the porous substrate. The decorative board according to claim 2,
The decorative board, wherein the apparent density of the coating film is 10 to 15 times the apparent density of the porous substrate. The decorative board according to any one of claims 1 to 3,
The decorative film is characterized in that the coating film contains an antibacterial and antifungal agent.

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