JP4009014B2 - Board materials for building interiors - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an interior board material used as a flooring material or wall material of various buildings, and more particularly to an interior board material of a building having an antibacterial effect.
[0002]
[Prior art]
Conventionally, some of the interior boards used in buildings such as hospitals, schools, and public facilities such as libraries are available on the market and used for building flooring and wall materials. Yes. The plate material is formed, for example, by coating a surface of a plate material made of muc material with a paint containing silver powder capable of obtaining an antibacterial action.
[0003]
[Problems to be solved by the invention]
However, in this plate material, since the silver content is extremely small, for example, about 0.4% by weight, careful handling such as management of silver content and storage management of silver at the manufacturing stage is important. However, there is a problem that the manufacture of the plate material itself is troublesome.
[0004]
The present invention has been made in view of such circumstances, and its purpose is to facilitate the manufacture of the plate material itself and to provide a stable antibacterial effect with a smaller amount of green tea over the entire surface of the plate material . It is in providing the board material for interior.
[0005]
[Means for Solving the Problems]
In order to achieve this object, the invention according to claim 1 of the present invention is an interior board having a plurality of coating films on the surface of a board material, and is a coating film on at least the surface side of the coating films. The powdery green tea having an antibacterial action and having a particle size of 3 to 10 microns in a micron unit so that the content ratio with respect to the paint forming the coating film is at least about 0.6% by weight. It is contained.
[0006]
By comprising in this way, the green tea contained in the coating film of the surface of a board | plate raw material has an antibacterial effect on the surface of a board | plate material by the antibacterial action which catechin etc. which are one of the components have. Since green tea does not need to pay close attention to handling such as content and storage management at the time of manufacture as compared with silver, manufacture of the plate material itself is facilitated. In addition, 3 to 10 micron micron-sized powdery green tea can be mixed and dispersed in the paint in a good state, and a more stable antibacterial effect can be obtained over the entire surface of the plate material. Since the content is at least approximately 0.6% at which no growth of various bacteria is observed, a sufficient amount of antibacterial effect can be obtained with a smaller amount of green tea.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.
1 to 6 show an embodiment of an interior board according to the present invention. FIG. 1 is a perspective view thereof, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. FIG. 4 is a process diagram showing an example of the manufacturing method, and FIGS. 5 and 6 are graphs of test results showing the antibacterial effect.
[0010]
In FIG. 1 to FIG. 3, the plate material 1 has a plate material 2 made of muku material formed to a predetermined length L, width W and plate thickness T, and three layers are formed on the surface side of the plate material 2. Coating films 3a to 3c are formed. Among these coating films 3a to 3c, in the coating film 3a on the most surface side, powdered green tea 4 is mixed (contained) as shown in FIG. As will be described later, the antibacterial effect is obtained on the surface 1a of the plate 1 by catechin or the like.
[0011]
And this board | plate material 1 is provided with the groove | channel 5 of the longitudinal direction in one side surface of the width W direction, and the protrusion 6 is provided in the other side surface, and this groove | channel 5 and the protrusion 6 are fitted. Thus, as shown by a two-dot chain line in FIG. 1, a plurality of plate members 1 are connected in the width direction and used as a flooring material or a wall material of a building.
[0012]
The plate 1 is manufactured, for example, as shown in FIG. That is, first, the plate material 2 cut to a predetermined size is supplied to the production line (K101), and dust adhering to the surface of the plate material 2 is removed with a rotating brush or the like (K102). Next, the plate material 2 is heated for a predetermined time (K103) to increase its surface temperature, and undercoating (K104) is performed to become the lowermost coating film 3c among the three coating films 3a to 3c. As the paint used for the undercoating, for example, a polyester-based paint that is dried by irradiation with UV light is used. For example, the paint is applied once by one painting roller (not shown).
[0013]
When undercoating is performed, the undercoating paint is dried (K105) by irradiation with UV light as described above to form a coating film 3c, and then an intermediate coating film among the three layers of coating films 3a to 3c. Intermediate coating (K106) to be 3b is performed. The same paint as the undercoat is used for the intermediate coating, and is applied twice by, for example, two coating rollers. When the intermediate coating is finished, the paint is dried (K107) by irradiation with UV light, and the paint film 3b is formed on the paint film 3c.
[0014]
When the intermediate coating is completed, the top coating (K108) is performed to become the coating film 3a on the surface side among the three coating films 3a to 3c. As the paint used in this top coating, for example, a polyester-based paint described above containing (mixed) a predetermined weight ratio of green tea powder 4 having a particle size of 3 to 10 microns in a micron unit is used. The paint is applied twice, for example with two paint rollers.
[0015]
And the coating material 3a is formed on the coating film 3b by making it dry (K109) by irradiation of UV light, and the manufacturing work of the board | plate material 1 which has the three-layer coating films 3a-3c on the surface side of the board | plate material 2 Is completed (K110). This manufacturing process is an example of a manufacturing process in a factory. For example, in the case of on-site construction, for example, a polyurethane-based paint is used as a paint to be used.
[0016]
FIG.5 and FIG.6 is a graph which shows the test result performed in order to confirm the antibacterial effect of the board | plate material 1 manufactured in this way. This will be described below. The test was performed by immersing a test piece set to each content rate described later in 1/500 ordinary bouillon for 24 hours, and then adjusting the surface of the test piece with a 1/500 ordinary bouillon (E. coli and yellow). Staphylococcus) was added dropwise, and a film was adhered thereto and stored at 35 ° C., and the bacterial solution on the test piece was measured by measuring the viable cell count after 24 hours. The green tea 4 uses the above-mentioned micron unit powder, and its content (addition rate) is 0%, 0.2%, 0.4%, 0.6%, 0.8%, 1% by weight. The cases of 0.0%, 2.0%, and 3.0% were tested. The number of test pieces was three, and the values in the graph show the average values of the three test pieces.
[0017]
FIG. 5 (a) shows the change in the number of E. coli after 24 hours, and FIG. 5 (b) shows the change in the number of S. aureus after 24 hours. First, for E. coli shown in FIG. 5 (a), in the case of 0% not containing green tea 4, the number of bacteria is increasing (growing), whereas 0.2% green tea 4 is contained. The number of bacteria is reduced by about 1 digit, when it is contained by 0.4%, it is reduced by about 3 digits, and when green tea 4 is contained by 0.6% to 3%, it is 24 hours. It was found that the number of bacteria after the lapse was 10 or less and no growth of the bacteria was observed.
[0018]
Similarly, for S. aureus shown in FIG. 5 (b), in the case of 0% in which green tea 4 is not contained, the number of bacteria is almost unchanged at the same digit, and 0.2% of green tea 4 is contained. In the case, the number of bacteria is reduced by about 1 digit, when it is contained by 0.4%, it is reduced by about 3 digits, and when the green tea 4 is contained by 0.6% to 3%, the number of bacteria is 10 It was found that no growth of bacteria was observed below.
[0019]
From these results, FIG. 6 is a graph based on the content ratio of green tea 4. The solid line indicates Escherichia coli and the dotted line indicates Staphylococcus aureus. From this graph, the number of bacteria decreases according to the content of green tea 4, the content decreases by about three digits of the initial value when the content is 0.4%, and the growth of each fungus is not observed when the content is 0.6% or more.
[0020]
From this graph, if the green tea 4 contained 0.6% in the paint used in the top coating, the growth of each fungus is not observed, and a sufficient antibacterial effect is obtained on the surface of the interior board 1 and green tea. It can be seen that the content of 4 can be made smaller, which is the most preferred form. However, for example, even when the content of green tea 4 is between 0.6% and 0.4%, a significant sterilization effect is obtained as compared with the case where green tea 4 is not contained. Of course, use in a form (for example, the content is about 0.5%) is also possible.
[0021]
Thus, in the board | plate material 1 of the said Example, it is powdery to the coating film 3a of the surface side most used as the surface 1a of a board | plate material among the coating films 3a-3c by which multiple layers coating is carried out on the surface side of the board | plate raw material 2. Since the green tea 4 is contained in a predetermined weight ratio, the antibacterial effect can be obtained on the surface 1a of the plate 1 by the antibacterial action such as catechin which is a part of the components of the green tea 4.
[0022]
In particular, it has been experimentally confirmed that if the content of green tea 4 in the coating film 3a is set to 0.6% or more, the growth of Escherichia coli and Staphylococcus aureus is not observed at all. Sufficient antibacterial effect can be obtained. Moreover, since the particle size of the powdered green tea 4 is set to, for example, 3 to 10 microns, the green tea 4 can be uniformly mixed with the paint and dispersed uniformly over the entire surface 1a of the plate 1. A stable antibacterial effect is obtained over the entire surface 1a of the plate 1.
[0023]
As a result, the board 1 can be used as a flooring or wall material of a building that can be easily touched by an infant such as a nursery school or a kindergarten, or as a flooring or wall material of a building that can be easily touched by a sick person such as a hospital. At the same time, it is necessary to pay close attention to the handling of content management and storage management of green tea itself compared to conventional silver at the manufacturing stage because it uses green tea 4 that people often like as an antibacterial substance. Therefore, it is possible to easily manufacture the plate material 1.
[0024]
7 and 8 are sectional views showing other embodiments of the interior board according to the present invention. In addition, the same code | symbol is attached | subjected to the same site | part as the said Example, and the detailed description is abbreviate | omitted. First, the plate material 1 shown in FIG. 7 is characterized in that the plate material 12 is formed of plywood, and two layers of coating films 13a and 13b are formed on the surface side of the plywood.
[0025]
That is, the plate material 12 is formed by laminating and bonding a pair of plate 12a and 12b in the plate thickness direction. For example, the lower plate 12b is formed with a groove 5 and a protrusion 6 for fitting, A coating film 13b by undercoating and a coating film 13a by topcoating are formed on the surface of the plate 12a. And the powdery green tea 4 is contained in the coating film 13a. Also in the plate material 1 of this embodiment, the green tea 4 having an antibacterial action is contained in the coating film 13a on the surface 1a side, and in addition to the same effect as the above embodiment, the plate material 12 is relatively The effect that it can be formed at low cost is obtained.
[0026]
Moreover, the characteristic of the board | plate material 1 shown in FIG. 8 exists in the point which formed the board | plate raw material 14 with the laminated material and formed the three-layer coating films 3a-3c on the surface side of this laminated material. That is, the plate material 14 is formed of, for example, a plurality of laminated members 14a laminated and bonded in the width direction of the plate material 1, and the fitting grooves 5 and the protrusions 6 are formed on the assembled members 14a at both ends in the width direction. Yes. And the coating layer 3a-3c of undercoat, intermediate coating, and topcoat is formed in the surface side of the assembly member 14a, and powdery green tea 4 contains predetermined weight ratio in the coating film 3a of topcoat. Also in this embodiment, the same effect as in FIG. 7 can be obtained.
[0027]
In addition, this invention is not limited to each of said each Example, For example, you may form the coating film of 2 layers like the board | plate material 1 shown in FIG. 7 in the board | plate material 1 shown in FIG. The embodiments can be combined as appropriate, and can be formed into an appropriate number of multiple layers having at least two coating layers, and the configuration of the plate materials 12 and 14 can be changed as appropriate. be able to.
[0028]
Moreover, in the said Example, although the case where powdery green tea 4 as an antibacterial substance was contained only in the coating film of the most surface side of a multilayer coating film was demonstrated to the example, this invention is limited to this. For example, the green tea 4 can be contained in the top coat and the intermediate coat, or the green tea 4 can be contained in all the coats. If comprised in this way, even if it is a case where the coating film of topcoat is worn out or rubbed, an antibacterial effect is acquired by the coating film located in the lower part, and the antibacterial effect for a long time is acquired to the board | plate material 1. Can do.
[0029]
Furthermore, in the said Example, although the groove | channel 5 and the protrusion 6 were provided in the both end surfaces of the width W direction of the board | plate material 1 and it demonstrated as an example the case where the several board | plate material 1 was connected by these fitting, The structure is an example, and an appropriate structure such as connection or butting by a step, for example, can be adopted. Moreover, the shape of the board | plate material 1 in the said Example, the manufacturing method of the board | plate material 1, the kind of coating material to be used, the particle size of the green tea 4, etc. are only examples, and can be variously changed in the range which does not deviate from the summary of this invention. Needless to say.
[0030]
【The invention's effect】
As described above in detail, according to the invention described in claim 1, powdered green tea containing an antibacterial effect by the action of catechin, which is one of its components, is contained in the coating film on the surface of the plate material. Therefore, it is not necessary to pay close attention to the content in the coating film and the storage management of green tea at the time of manufacture, so that the plate material itself can be easily manufactured. In addition, since the particle size of the powdered green tea is set to 3 to 10 microns, it can be mixed and dispersed in a good state in the paint, resulting in a more stable antibacterial effect over the entire surface of the plate. Obtainable. Furthermore, since the content of the powdered green tea is set to at least about 0.6% by weight, a more sufficient antibacterial effect can be obtained with a smaller amount of green tea.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a board for interior of a building according to the present invention. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1. FIG. Process chart showing an example of a method for producing the same plate material. FIG. 5 shows the test results regarding the antibacterial effect. (A) is a graph of the number of bacteria with respect to aging of Escherichia coli. Fig. 6 is a graph showing the number of bacteria with respect to the content of green tea. Fig. 7 is a cross-sectional view showing another embodiment of a board for interior of a building according to the present invention. Fig. 8 is a building according to the present invention. Sectional drawing which shows other Example of the board | plate material for interior of a thing [description of a code]
DESCRIPTION OF SYMBOLS 1 ... Plate material 1a ... Surface 2 ... Plate materials 3a-3c ... Coating film 4 ...・ ・ ・ Green tea 5 ・ ・ ・ ・ ・ ・ ・ ・ Groove 6 ・ ・ ・ Projection 12 ・ ・ ・ ・ ・ ・ ・ ・ Plate material 12a, 12b ・ ・ ・ Mug plate 13a, 13b ・..Coating film 14 ... Plate material 14a ... Glue

Claims (1)

An interior plate having a plurality of layers of coating on the surface of the plate material, and having an antibacterial action within at least the surface of the coating, having a particle size of 3 to 10 microns An interior board material for a building, characterized in that the powdered green tea is contained so that the content ratio to the paint forming the coating film is at least about 0.6% by weight.

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