JP2002194876A - Antifouling surface structure of building and panel used in it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antifouling surface structure of a building capable of effectively preventing the occurrence of a part where water containing dirt is concentrated in a building to cause concentrated adhesion of dirt, and having good antifouling effect and self-cleaning effect. SOLUTION: In this building having a frame 2 fitted to an antifouling wall surface formed by antifouling finished panels 1, an upper frame 2a and a lower frame 2b of the frame are respectively covered with cover members 10a, 10b so that water does not flow to be partially concentrative on the side of the frame, and the upper end edge part of at least the cover member for covering the upper frame is brought into contact with the wall surface, thereby guiding flow of water from the upper part of the frame downward through the cover member. According to another mode, a trough like drip member is provided on the upper end edge part of the upper frame of the frame or the upper end edge parts of the upper frame and the lower frame, or the joint part of the adjacent panels is sealed like a recessed part to drain water by the trough like drip member or the recessed joint part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifouling surface structure of a building and a panel used for the same, and more particularly, to a technique for reducing stains on a building exterior and the like.

[0002]

2. Description of the Related Art For exterior building materials such as curtain walls, various antifouling methods have been studied in order to maintain their design and reduce maintenance costs. For example, Japanese Patent No. 2756474 discloses that a photocatalytic material exerts a self-cleaning action (self-cleaning action) due to its hydrophilicity. Further, various antifouling paints for exhibiting a self-purifying effect are also commercially available from various paint makers.

[0003]

In a surface treatment which exerts an antifouling effect by "hydrophilicity" such as a photocatalyst or a hydrophilic antifouling paint, rainwater floats dirt adhering to the surface of the building material, and is washed away by self-cleaning action. Is exhibited.
However, depending on the structure of the building, such as a wall surface to which a sash frame or the like is attached, a portion where the above-mentioned contaminated water is concentrated may occur, the contamination speed may increase, and antifouling properties may not be exhibited. In this case, since other parts maintain the antifouling property, the adhered dirt becomes conspicuous.

This will be described with reference to the drawings. The wall surface of a building such as a building has a structure as shown in FIG. 12, for example. The sash frame 2 in which the double-walled glass 3 is fitted through the sealing material 5 while the wall surface is configured by being incorporated by the joint sealing material 4 such as a sealant,
For example, it is attached as shown in FIG. Also,
As shown in FIG. 14, for example, the panels 1 are assembled via joint sealing members 4 so as to be substantially flush with each other. Accordingly, rainwater containing dirt that has flowed down the panel surface from above the sash frame 2 is stopped and collected by the upper frame 2a, flows sideways, and flows down along the side frames 2c and 2d. Since the dirt is partially concentrated on the side corners and the lower part X, the dirt is more conspicuous than other panel parts that exhibit a self-cleaning effect.
In addition, when hydrophilic antifouling treatment is applied to the wall panels of high-rise buildings, etc., the rainwater containing a large amount of dirt removed in the upper layers will concentrate on the panels installed in the lower layers, and sufficient self-cleaning will be required. The cleaning effect may not be exhibited.

[0005] Accordingly, an object of the present invention is to provide a site where dirt-containing water is concentrated on a building as described above, and it is possible to effectively prevent the dirt from being intensively attached to the building. An object of the present invention is to provide an antifouling surface structure of a building having an excellent cleaning effect, and to maintain a beautiful appearance of the entire building for a long period of time. It is a further object of the present invention to provide a panel for constructing an antifouling surface structure of a building which can be suitably used for forming such an antifouling surface structure.

[0006]

According to a first aspect of the present invention, there is provided an antifouling surface structure of a building, according to a basic aspect thereof. In a building in which a frame is attached to a natural wall, in order to prevent the water from partially concentrating on the side of the frame and flowing down, a flowing water portion for guiding the flow of water downward or to the side from the top of the frame or It is characterized by having a drainage section.

In one embodiment of the antifouling surface structure of a building according to the present invention, the flow of water from the upper part of the frame is downward so that water does not partially concentrate on the side of the frame and flow down. A flowing water section is provided, and a more specific embodiment thereof is such that in a building in which a frame is attached to an antifouling wall surface, water does not partially concentrate on a side portion of the frame to flow down. The upper frame and the lower frame of the frame are respectively covered with a cover member, at least the upper edge of the cover member covering the upper frame is brought into contact with the wall surface, and the flow of water is guided downward through the cover member from the upper frame. It is characterized by doing so.

Another aspect of the antifouling surface structure of a building according to the present invention is to provide a drainage portion on a side portion of the frame so that water does not partially concentrate and flow down. The aspect is, in a building in which a frame is attached to an antifouling wall surface, so that water does not partially concentrate on the side of the frame and flow down, or the upper edge of the upper frame of the frame, or A gutter-like drainage section is provided along the upper end edges of the upper frame and the lower frame, and the gutter-like drainage section drains water laterally.

[0009] On the other hand, in the second embodiment in which the drainage section is provided, the wall of the building is composed of a combination of a plurality of panels, and water is partially concentrated on the side of the frame so as not to flow down. The joint portion of each adjacent panel is sealed in a concave shape, and water is drained by the concave joint portion. Further, according to the second aspect of the present invention, in order to carry out this aspect, a flat panel material whose surface is subjected to antifouling treatment, and a predetermined peripheral portion on one side of the panel material from the edge. A panel for constructing an antifouling surface structure of a building, comprising a frame member attached inside the distance.

In any of the above embodiments, the antifouling wall surface (the same applies to the panel for constructing the antifouling surface structure).
Preferably has a hydrophilic material on the surface. The hydrophilic material is particularly preferably a material having a photocatalytic action.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS It has been conventionally thought that a self-cleaning action can be exerted in any part where water is supplied and flows down if a hydrophilic antifouling treatment is performed. However, from various exposure tests, it was found that sufficient antifouling performance could not be exhibited in a portion where water stays or concentrates and flows down. According to the study of the present inventors, in such a case, control of the flow of water is important,
By actively running rainwater, or by providing a running water / drainage path, it is possible to exert a self-cleaning effect even on areas that become dirty even when the conventional hydrophilic antifouling surface treatment is applied. The present invention has been made possible, and it has been found that the beauty and design of the entire building can be maintained, and the present invention has been completed.

That is, in the antifouling surface structure of a building according to the present invention, in a building in which a frame is attached to an antifouling wall surface, water is partially concentrated on the side portion of the frame and does not flow down. As described above, a flowing portion or a drain portion for guiding the flow of water downward or to the side from the upper portion of the frame body is provided. For example, when building materials such as aluminum panels, aluminum profiles, glass, tiles, and stones that have been subjected to antifouling treatment with a photocatalytic film or a hydrophilic film by hydrophilic antifouling coating or surface treatment are used for wall surfaces and the like, A cover member is provided to smooth the unevenness of the upper frame, lower frame, etc. of the frame body, so that water does not stay and concentrate on specific parts such as corners on both sides of the frame body, so that it can flow evenly on the building material surface Alternatively, the flow of water is guided to the side by providing a flow path and a drain path.

[0013] By controlling the flow of water in this way and avoiding partial concentration of rainwater containing dirt, there is no accumulation of dirt at a specific portion, and the antifouling effect of the photocatalytic film and the hydrophilic film. In addition, the self-cleaning effect can be stably exhibited for a long period of time, and the aesthetic appearance of the building exterior can be maintained for a long period of time. Buildings and building materials include all types of exterior building materials such as buildings and houses (walls and roofs, etc.), bathroom structures, sun rules, terraces, balconies, and exterior products (outdoor lights, benches, etc.). Or it is not limited to building materials.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. 1 and 2 show one embodiment of the antifouling surface structure of a building according to the present invention. Each panel 1 whose surface has been subjected to antifouling treatment has a joint seal made of a modified silicone sealant or the like. The sash frame 2 has a wall surface constituted by a material 4 and a double glass 3 having a surface that has been similarly subjected to antifouling treatment inserted through a sealing material 5 such as a modified silicone sealant. The attachment is the same as in the above-described conventional example. In the present embodiment, the upper frame 2 of the sash frame 2 is
a and cover member 10 so as to cover lower frame 2b, respectively.
a and 10b are attached.

As shown clearly in FIG. 2, each of the cover members 10a and 10b has a gentle trapezoidal sectional surface. Note that the surfaces of the cover members 10a and 10b may be formed in a gentler curved shape (semi-elliptical shape or the like), and it is preferable that the surfaces are subjected to antifouling treatment similarly to the antifouling treatment panel 1. Also, the upper cover member 10a
Of the lower cover member 10b is in contact with the glass 3, and the lower end edge thereof is in contact with the panel 1. Therefore,
Rain water containing dirt that has flowed down on the panel surface on the upper part of the sash frame 2 flows directly on the cover member 10a covering the upper frame 2a, and after cleaning the surface of the glass 3, the rain water containing the dirt flows on the cover member 10b covering the lower frame 2b. Flow down as it is. Accordingly, the side frames 2 are stopped and collected by the upper frame 2a as in the prior art.
c, 2d, the dirt is prevented from being partially concentrated on the side corners of the lower frame 2b and the lower part thereof, and the self-cleaning of each panel 1 and the glass 3 subjected to the antifouling treatment is performed. The action is exerted effectively.

As the material having an antifouling action used in the antifouling treatment, a material layer having an antifouling action such as a hydrophilic film or a photocatalytic film, particularly a material layer having a photocatalytic action is suitably used. As the hydrophilic film, a film containing an inorganic oxide, particularly a silica-based oxide, is suitably used. By making the surface hydrophilic, it becomes difficult for dirt to adhere thereto, and the surface is cleaned with rainwater or washing water. It is easy to use, but it is particularly preferable to use a building material provided with a photocatalytic film that positively decomposes dirt by a photocatalytic action. Photocatalytic fine particles are known to exhibit antibacterial and antifungal effects by active oxygen species generated under light irradiation, and can not only reduce stains on exterior building materials, but also prevent the generation of bacteria and mold. Becomes

The photocatalyst film may be any of various conventionally known photocatalyst films, and may be a thin film made of a semiconductor itself exhibiting a photocatalytic action, a thin film formed only of photocatalyst fine particles, an antibacterial metal or an antibacterial material. A thin film formed from photocatalyst fine particles carrying fine particles of a metal compound, furthermore, fine particles of a photocatalytic fine particle or, if necessary, an antibacterial metal or an antibacterial metal compound in a suitable inorganic or organic binder or paint. It includes various aspects such as a film formed from the added and dispersed mixture. Further, the structure of the photocatalytic film may be any structure such as a continuous thin film, a discontinuous thin film, and an island-shaped dispersed thin film, and is not limited to a single layer, but may be a multilayer structure. Further, a photocatalytic film made of semiconductor fine particles or a material containing semiconductor fine particles,
It may have a two-layer structure with a photocatalyst film in which an oxidizing agent or / and an oil repellent or a photocatalytic activity promoter is added or / and supported on the film or / and on the film surface.

As the semiconductor having a photocatalytic action, any semiconductor having a relatively high electron-hole mobility and having a photocatalytic action can be used. For example, TiO ₂ ,
SrTiO ₃ , ZnO, CdS, SnO _{2 and the} like can be mentioned, and among them, TiO ₂ is particularly preferable. In addition, if an antibacterial metal or an antibacterial metal compound such as silver, copper, and zinc coexist with a semiconductor having such a photocatalytic action,
For example, if semiconductor particles having an antibacterial metal or an antibacterial metal compound deposited on the surface are used, dispersed in the photocatalyst film together with the semiconductor particles, or attached to the surface of the photocatalyst film, the light is not irradiated at night. Even antibacterial
Mold resistance is maintained.

The semiconductor, antibacterial metal or antibacterial metal compound having a photocatalytic action may be in the form of individual fine particles, the anticatalytic metal or antibacterial metal compound partially (or partially) on the surface of the photocatalytic fine particles. Particles may be whole) Adhered form, Inorganic binder fine particles such as silica partially adhered to the surface of photocatalytic fine particles, Inorganic binder fine particles and antibacterial metal or antibacterial property on the surface of photocatalytic fine particles Various forms can be adopted, such as a form in which a metal compound is partially adhered, a form in which antibacterial metal or inorganic binder fine particles to which an antibacterial metal compound is adhered are adhered to the surface of photocatalytic fine particles.

The photocatalyst fine particles used have a particle size of about 5 nm.
Above, about 1 μm or less, preferably about 10 nm to 300 n
m is appropriate. If the particle size is smaller than 5 nm, the band gap becomes large due to the quantum size effect, and there is a problem that a photocatalytic action cannot be obtained unless under illumination that generates short-wavelength light such as a high-pressure mercury lamp. If the particle size is too small, problems arise such as difficulty in handling and poor dispersibility in the binder.
A particle size of 10 nm or more is preferred from the viewpoint of handleability.
On the other hand, when the particle size exceeds 1 μm, relatively large photocatalyst fine particles are present on the surface of the building material, so that the surface becomes poor in smoothness and the particles exposed on the surface easily fall off. In consideration of the smoothness of the surface and the like, a particle size of 300 nm or less is preferable.

When a photocatalyst film is formed on various organic materials or a material on which an organic film is formed, an organic substrate (organic film) and a photocatalytic film are formed so that the organic substrate (organic film) is not attacked by photocatalysis. It is preferable that an intermediate layer having a thickness of about 3.2 μm or more made of a material which is not attacked by the photocatalytic action is interposed between the first and second layers. Silica, alumina, indium oxide, zirconium oxide, SiO ₂ + MO _x (MO _x is P ₂ O)
₅ , at least one kind of metal oxide such as B ₂ O ₃ , ZrO ₂ , Ta ₂ O ₅ ) or various inorganic materials such as nitrides, oxynitrides, sulfides, carbides, carbons and other ceramics, and metals. A thin film can be suitably used. In addition, a thin film of an organic material such as a silicone resin or polytetrafluoroethylene which is not or very hardly affected by photocatalysis can be used. In addition, these materials can also be used as a base (binder) of a dispersion paint of photocatalyst fine particles.

Further, by adding or / and supporting an oxidizing agent in or / and on the surface of the photocatalytic film,
The ability to oxidatively decompose organic substances can be significantly improved by the synergistic effect of oxidative decomposition of organic substances by photocatalysis and oxidative decomposition of organic substances by an oxidizing agent. Examples of such oxidizing agents include chromates and chromate-related compounds such as Na ₂ CrO ₄ , permanganates such as KMnO ₄ , nitrates and nitrate-related compounds such as AgNO ₃ , and sulfates such as CuSO _4. , FeC
l ₃ of a metal such as chlorides, CuO, like oxides of Ag ₂ O and the like. Further, in addition to the oxidizing agent, A as a photocatalytic action promoting agent in the photocatalytic film or / and on the photocatalytic film surface.
By adding or / and supporting at least one of metals and metal ions such as u, Ag, Pt, Pd, and Cu, and chlorides, sulfides, and nitrates of these metals, the photocatalytic action is further enhanced. And can further reduce contamination. Most of these metals and metal compounds also act as the aforementioned antibacterial metal or antibacterial metal compound.

Further, a material having water repellency and / or oil repellency as described later can be added to the photocatalyst film or applied to the surface of the photocatalyst film, whereby the chemical affinity between the photocatalyst film and the oil and fat can be increased. The oil repellency can be reduced. This is effective in preventing adhesion of oils and fats such as silicone oil oozing out from the modified silicone sealant used as the joint sealing material 4 or the like. It is known that ordinary photocatalyst films cause a lipophilic phenomenon in which the contact angles of various fats and oils components decrease at the same time as the hydrophilicity that the contact angle of water decreases under light irradiation. That is, since the surface of the photocatalytic film under light irradiation has excellent chemical affinity not only for water but also for various fats and oils components, when oils and fats adhere, water enters the interface between the oils and fats and the photocatalyst film, and It is difficult to raise the minute. However, if the photocatalytic film is made oil-repellent by adding or / and supporting a water repellent or / and an oil repellent in the photocatalytic film or / and on the photocatalytic film surface, and the chemical affinity between the photocatalytic film surface and the oil and fat is reduced. Water enters the interface between the oil and fat and the photocatalyst film, so that the oil and fat easily floats up, and the floated oil and fat can be easily washed away with water.

FIGS. 3 to 5 show another embodiment of the antifouling surface structure of a building according to the present invention, in which the surface is subjected to a hydrophilic antifouling treatment as described above (hydrophilic film, photocatalytic film). Each of the panels 1 to which the above is applied) is similar to that of the above-described embodiment in that a wall surface is formed by incorporating a joint sealing material 4 such as a modified silicone sealant or the like. The upper frame 2a of the sash frame 2 in which the double glass 3 having a surface subjected to hydrophilic antifouling treatment is fitted via a sealing material 5 such as a modified silicone sealant.
The difference is that drainers 11a and 11b each having an L-shaped cross section are attached via a joint sealing material 4 between the lower frame 2b and each panel 1. The manner of mounting the water draining members 11 a (11 b) between the panels 1 is as shown in FIG. 5, and the joint sealing member 4 is interposed between the water draining members 11 a and the upper panel 1. In addition, it is preferable to similarly perform hydrophilic antifouling treatment on the surfaces of the drainers 11a and 11b.

In this embodiment, rainwater containing dirt that has flowed down the panel surface above the sash frame 2 is collected by the draining member 11a installed along the upper frame 2a of the frame 2, and Rainwater containing dirt that has flowed down the panel surface on the side thereof is collected by a draining member 11b installed along the lower frame 2b of the frame 2, guided to each side, and installed at, for example, a corner of a building. Collected in a downspout (not shown). Therefore, also in the wall surface structure of the present embodiment, it is possible to prevent the dirt from being partially concentrated on the side corners of the frame body 2 as in the related art, and to provide each panel material subjected to the hydrophilic antifouling treatment. 1, the self-cleaning effect is effectively exhibited. The draining member 11b provided along the lower frame 2b of the frame 2 is not always necessary, but when many months have passed, dirt tends to partially concentrate on the lower part of the side corner of the lower frame 2b. Therefore, it is preferable to provide them.

It is preferable that the side surfaces of the draining members 11a and 11b are subjected to hydrophilic antifouling treatment, and the lower surface is provided with a material layer having water repellency and / or oil repellency. This means that the cover members 10a, 10a as shown in FIG.
The same applies to the slope that faces downward from b. When a hydrophilic surface treatment is applied to a part parallel to the ground surface, such as the eaves, the water film spreads due to the hydrophilicity and falls due to gravity. As a result, the drainage of water becomes insufficient and dirt adheres to the dirt-containing water by drying. In addition, when hydrophilic antifouling treatment is applied to the part where the wall and eaves are continuous, water containing dirt on the wall flows into the eaves, stays and dries, especially Dirt easily forms on the eaves top. In addition, since the wall portion exhibits antifouling properties and the dirt is not conspicuous, the dirt on the eaves is further emphasized. According to the research of the present inventors, it has been found that water repellency or / and oil repellency is more advantageous for exhibiting antifouling properties at such a site, and furthermore, antifouling properties are required. It has been found that the use of a hydrophilic action and a water-repellent or / and oil-repellent action for each of the different sites, and the combined use of the two can effectively exhibit antifouling properties.

Similarly, in a building or a building material having a portion substantially perpendicular to the ground surface and a portion substantially parallel to the ground surface, the surface of the substantially parallel portion (including both the lower surface and the upper surface) has water repellency and / or By providing a material layer having oil repellency, water is easily drained even at this portion,
It is possible to effectively prevent dirt from adhering due to drying of the dirt-containing water. On the other hand, by providing a material having an antifouling action, for example, a material having a hydrophilic action or a photocatalytic action as described above on the surface of the portion substantially perpendicular to the ground surface and the surface of the portion inclined obliquely upward, These antifouling effects and self-cleaning effects are exhibited. Therefore, by selectively using the hydrophilic action and the water repellent action for each site where antifouling properties are required, and by using them in combination,
The antifouling property can be exhibited effectively, and the aesthetic appearance of the building exterior can be maintained for a long time.

Examples of the water-repellent material include a fluorinated silane compound and silicone, but there is no particular limitation as long as the material can be applied and impregnated. Further, a water-repellent film or film such as polytetrafluoroethylene (Teflon) can also be applied. Specific examples of the oil-repellent material include oil-repellent compounds such as a fluorine compound and a silicone compound. More specifically, Asahi Guard AG-400 series and AG-9 manufactured by Asahi Glass Co., Ltd.
00 series, AG-600 series, Sumilofil-EM series manufactured by Sumitomo Chemical Co., Ltd., Nichika Chemical Co., Ltd.
NK Guard-FGN series manufactured by Daikin Industries, Ltd., Tex Guard-TG series manufactured by Daikin Industries, Ltd., Dick Guard-F series, NH-10 series, CP series manufactured by Dainippon Ink and Chemicals, Scotch Guard manufactured by Sumitomo 3M Ltd. -FC series, Teflon manufactured by DuPont-T
Eflon series, etc.

FIGS. 6 and 7 show an antifouling treatment panel which can be suitably used in another embodiment having a drainage section. The antifouling treatment panel 12 includes a flat panel material 13 whose surface has been subjected to the hydrophilic antifouling treatment as described above,
A frame member 14 is attached to a peripheral edge of one side surface of the panel member 13 at a predetermined distance inward from the edge. Reference numeral 15 denotes a reinforcing member attached along the center line of the back surface of the panel member 13.

As shown in FIG. 8, the panel 12 is assembled such that the joints 4 are interposed between the frame members 14 of the adjacent panels 12 so that the concave joints 16 are formed.
It is constructed with an inner joint structure. In the antifouling wall surface structure of this embodiment, water flowing down the surface of the panel 12 on the wall surface flows into the concave joint 16 and is guided laterally and downward by the concave joint 16. Therefore, also in the wall surface structure of this embodiment, the concentration of dirt is partially prevented from being concentrated on the side corners of the frame body as in the related art, and the hydrophilic and soil-resistant anti-fouling treatment is applied to each panel material. The self-cleaning action is effectively exerted.

FIG. 9 shows the antifouling treatment panel 1 shown in FIG.
2 shows another configuration example of the wall structure constructed by using No. 2. In this wall structure, the vertical joints between the upper panels 12 are formed in a straight line, but the vertical joints between the lowermost panels 12 are shifted so as to be located at the center of the upper panel. I have. In the case of such a wall structure, in the conventional joint structure, water containing dirt (including oil and fat oozing from the joint sealing material) easily concentrates in the Y portion, and as a result, dirt is easily generated. When constructed using the panel 12, the water flowing down the surface of the panel 12 is concave joint 1
6 and is guided laterally by the concave joints 16,
Further, since the panel is guided downward, the self-cleaning action of each panel subjected to the hydrophilic antifouling treatment is effectively exerted, and the occurrence of partial contamination is prevented.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be implemented in various modes. For example, the antifouling panel shown in FIGS. 6 and 7 can also be used to construct the antifouling wall structure shown in FIGS. 1 and 2 and the antifouling wall structure shown in FIGS. Also in this case, a panel arrangement form as shown in FIG. 9 can be adopted. Further, when a cover member is used, as shown in FIG. 2, the upper edge of the upper cover member 10a contacts the panel 1, the lower edge of the upper cover member 10a contacts the glass 3, and the upper edge of the lower cover member 10b contacts the glass 3. 3, it is the best mode that the lower edge is configured to be in contact with the panel 1, but when self-cleaning of the glass surface is not necessary, the glass surface can be prevented from being subjected to antifouling treatment. , Upper cover member 1
The lower edge of Oa is not in contact with the glass 3 (for example, the width of the slope facing downward is reduced or deleted), or the lower cover member 10b
It is also possible to configure so that the upper end edge of the glass does not contact the glass 3. Further, the joining between the panels may be a tongue-and-groove structure.

[0033]

EXAMPLES Hereinafter, the effects of the present invention will be described more specifically with reference to examples and comparative examples. However, it goes without saying that the present invention is not limited to the following examples.

Sample 1 Dimension 1000 mm × 1000 mm of the shape shown in FIG.
Fluorine coating (Duflon K500 manufactured by Nippon Paint Co., Ltd.) on an aluminum plate (A1100) of (thickness 3 mm), color:
White). Next, a coating agent for photocatalyst film “Vistrator NS” manufactured by Nippon Soda Co., Ltd.
C-200A "is applied by spraying and heated at 90 ° C. for 30 minutes to cure to form an intermediate layer, and on top of this, a photocatalyst film coating agent“ Vistor L, NSC-200C ”manufactured by Nippon Soda Co., Ltd. Spray applied at 120 ° C
And cured for 30 minutes to form a photocatalyst layer, and a photocatalyst antifouling coating was applied.

Sample 2 An aluminum panel having the shape shown in FIGS.
Fluorine coating (Duflon K500 manufactured by Nippon Paint Co., Ltd., color: white) on the panel material surface of 0 mm x 1000 mm)
Was given. Next, Nippon Soda Co., Ltd.
Photocatalyst film coating agent "Vistrator NSC-2"
00A "is applied by spraying, and heated at 90 ° C. for 30 minutes to cure to form an intermediate layer. On top of this, a photocatalytic film coating agent“ Vistrator L, manufactured by Nippon Soda Co., Ltd.
NSC-200C ”and spray at 120 ° C for 30
After being heated and cured for a minute, a photocatalyst layer was formed, and a photocatalyst antifouling coating was applied.

Sample 3 A photocatalyst coating agent ST-K03 manufactured by Ishihara Sangyo Co., Ltd. was applied to a glass plate having a size of 800 mm × 800 mm × 5 mm to form a photocatalytic film.

Example 1 As shown in FIGS. 1 and 2, the panel of sample 1 and the sample 3
And a cover member 10a, 10b made of an extruded aluminum material is attached between the upper and lower frames of the sash and the panel to cover the upper and lower frames of the sash. .

Example 2 As shown in FIG. 3 and FIG.
A sash incorporating the glass plate is disposed, and the draining members 1 are respectively arranged along the edges of the upper frame and the lower frame of the sash.
1a and 11b were attached.

Example 3 A sash incorporating the panel of sample 2 and the glass plate of sample 3 was arranged as shown in FIG. 10 and constructed with an internal joint structure as shown in FIG.

Comparative Example 1 A sash incorporating the panel of Sample 1 and the glass plate of Sample 3 was attached as shown in FIG. The first and second embodiments and the first comparative example have a normal joint structure as shown in FIG.

Test Example 1 Each of the panel-integrated bodies of Examples 1 to 3 and Comparative Example 1 was set up outdoors and exposed for half a year, and thereafter, the color difference ΔE after exposure of each part a to g shown in FIG. Was measured to determine the contamination status. Here, ΔE indicates the difference between the hue before the exposure and the hue after the exposure, and the larger this number is, the more contaminated the situation is. Table 1 shows the measurement results of the color difference ΔE.

[0042]

[Table 1] As shown in Table 1, it was confirmed that the color difference between the part b and the part e in Comparative Example 1 was large, and that streak-like stains were visually observed. This is a phenomenon that occurs because rainwater containing dirt on the panel above the sash is collected by the sash frame and flows down intensively at both corners of the sash. On the other hand, in Examples 1 to 3, almost the same color difference is shown in any part. The reason is as follows. Example 1: This is because water uniformly flowed down the sash and the glass surface, and did not concentrate on the corners on both sides of the sash. Example 2: This is because rainwater containing dirt was discharged outside the panel by the draining member. Example 3: Water was contaminated by flowing into the inner joint, and was not concentrated on both corners of the sash, by using the inner joint structure.

Test Example 2 Each of the panel integrated bodies of Example 1 and Comparative Example 1 was set up outdoors and exposed for half a year, and the visible light transmittance of the center of the glass plate before and after exposure was measured. Table 2 shows the results.

[0044]

[Table 2] As shown in Table 2, the amount of decrease in the visible light transmittance of the glass plate of Example 1 before and after exposure is smaller than that of Comparative Example 1. This is because, in Comparative Example 1, the water flowing from the upper panel to the glass surface is blocked by the upper sash frame, but in Example 1, the water from the upper panel surface was evenly supplied to the glass surface. The effect is.

In the above test, based on the case of the panel and the glass of Example 1, the concentration of dirt can be prevented by dispersing the water without partially concentrating the water, and the appearance and design of the antifouling treated building material can be prevented. It has been confirmed that it is effective to stably exhibit water over a long period of time and to flow down the water without concentrating the water in order to secure the antifouling property. Furthermore, based on the examples of the panels of Examples 2 and 3, the drainage path and flowing water path are intentionally provided to control the flow of water, thereby preventing the concentration of dirt, and thus the appearance of the antifouling treated building material. -It was confirmed that the design could be exhibited stably over a long period of time.

Embodiments 4-6 As shown in FIG. 9, a panel assembly was manufactured in the same manner as in Embodiments 1-3 except that the joint structure between the lowermost panel and the panel above it was discontinuous. When tests were performed in the same manner as in Examples 1 to 3, the same results as those in Examples 1 to 3 were obtained, and it was confirmed that generation of stains could be prevented even with such a joint structure.

[0047]

As described above, according to the antifouling surface structure of a building of the present invention and the antifouling panel used therein, water is allowed to uniformly flow without being partially concentrated, Since the flow of water is controlled by intentionally providing a flowing water path, there is a site where dirt-containing water concentrates on the building, which can effectively prevent the dirt from being intensively attached to the building. The antifouling effect and the self-cleaning effect can be effectively and stably exhibited, and the beauty and design of the building exterior can be maintained neatly over a long period of time.

[Brief description of the drawings]

FIG. 1 is a schematic partial front view of an example of an antifouling surface structure of a building according to the present invention.

FIG. 2 is a schematic partial cross-sectional view of a panel-sash joint of the antifouling surface structure shown in FIG.

FIG. 3 is a schematic partial front view of another example of the antifouling surface structure of the building according to the present invention.

FIG. 4 is a schematic partial cross-sectional view of a panel-sash joint of the antifouling surface structure shown in FIG.

5 is a schematic partial cross-sectional view of a panel-to-panel joint of the antifouling surface structure shown in FIG. 3;

FIG. 6 shows an example of an antifouling panel used for the antifouling surface structure of a building according to the present invention, wherein (A) is a front view and (B) is a right side view.

FIG. 7 is a sectional view taken along line VII-VII of the antifouling panel shown in FIG. 6;

8 is a cross-sectional view of a joint when the antifouling panel shown in FIG. 6 is assembled.

FIG. 9 is a front view showing another example of the arrangement of the antifouling panel shown in FIG. 6;

FIG. 10 is a front view of a panel assembly showing a color difference measurement site in Test Example 1.

11 shows antifouling panels of Sample 1 used in Examples 1 and 2 and Comparative Example 1, (A) is a front view, and (B) is a cross-sectional view.

FIG. 12 is a schematic partial front view of an example of a conventional antifouling surface structure of a building.

13 is a schematic partial cross-sectional view of a panel-sash joint of the antifouling surface structure shown in FIG.

14 is a schematic partial cross-sectional view of a panel-to-panel joint of the antifouling surface structure shown in FIG.

[Explanation of symbols]

 1,12 Antifouling treatment panel 2 Sash frame 2a Upper frame 2b Lower frame 3 Antifouling double glass 4 Joint sealing material 10a, 10b Cover member 11a, 11b Drainer 16 Concave joint

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E001 DA02 DH00 DH12 DH23 FA03 FA09 FA16 FA18 FA32 FA42 FA46 FA51 GA03 GA13 GA86 HA11 HB01 HB05 HB07 HD11 HE00 HF02 KA01 MA02 MA06 2E110 AA65 AB22 BA12 DD11

Claims (7)

[Claims] 1. In a building in which a frame is attached to an antifouling wall surface, water is directed downward or laterally from an upper portion of the frame so that water does not partially concentrate on a side portion of the frame and flow down. An antifouling surface structure of a building, provided with a flowing water portion or a drainage portion for guiding a flow of water. 2. In a building in which a frame is attached to an antifouling wall surface, an upper frame and a lower frame of the frame are respectively formed so that water does not partially concentrate on a side portion of the frame and flow down. The building is characterized in that it is covered with a cover member, at least an upper edge of the cover member covering the upper frame is brought into contact with a wall surface, and water flows down the cover member from above the frame body to guide the flow of water downward. Dirty surface structure. 3. In a building in which a frame is attached to an antifouling wall surface, an upper edge of an upper frame of an upper frame of the frame, so that water does not partially concentrate on a side portion of the frame and flow down. Alternatively, an antifouling surface structure for a building, wherein a gutter-like drainage section is provided along upper end edges of the upper frame and the lower frame, and the gutter-like drainage section drains water laterally. 4. In a building in which a frame is attached to an antifouling wall surface, the wall surface is composed of a combination of a plurality of panels, and water is partially concentrated on a side portion of the frame so that water does not flow down. A joint portion of each adjacent panel is sealed in a concave shape, and water is drained by the concave joint portion; 5. The antifouling surface structure of a building according to claim 1, wherein the antifouling wall surface has a hydrophilic material on a surface. 6. The antifouling surface structure of a building according to claim 5, wherein the hydrophilic material is a material having a photocatalytic action. 7. A flat panel material having a surface subjected to antifouling treatment, and a frame member attached to a peripheral edge of one side of the panel material by a predetermined distance from an edge. Panel for building antifouling surface structure of building.