JP4009997B2 - Construction method of membrane structure building using membrane coated with surface treatment agent - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a method for constructing a membrane structure building using a membrane coated with a surface treatment agent used in a membrane structure such as a dome.
[0002]
[Prior art]
Examples of a membrane structure building using a membrane coated with a conventional surface treatment agent include a roof portion and a curtain such as a dome or a stadium (see Patent Document 1). The film of the membrane structure building using the film coated with these conventional surface treatment agents has been coated with a surface treatment agent according to the purpose such as antifouling, durability improvement and bonding in the production process.
And this surface treatment agent used a substantially transparent or colorless and transparent surface treatment agent so as not to impair the coloring or appearance of the film material, and was almost transparent or colorless and transparent even after drying and sintering. (See Patent Document 2). In the present specification, the term “film” is a concept including materials used for the various film structures described above, and includes a concept in which the surface of the material (raw material) is coated with a surface treatment agent or is not coated. It is used as.
As described above, since a substantially transparent or colorless and transparent material is used as the surface treatment agent, the surface of the film coated with the conventional surface treatment agent is high against sunlight in the outdoors where the membrane structure building is constructed. Because of its reflectivity, construction workers who work to stretch and attach membranes, like snowfields and summer mountains and beaches, wear thick coats to protect their bodies from UV rays and avoid sun exposure. In order to prevent glare caused by reflection of light, construction work of the membrane structure building must be performed while wearing sunglasses.
[0003]
[Patent Document 1]
Japanese Unexamined Patent Publication No. 2000-179074 (second page and FIG. 1)
[Patent Document 2]
Japanese Patent Application Laid-Open No. 09-226064 (2nd page)
[0004]
[Problems to be solved by the invention]
When performing the construction work of the above membrane structure building during the day when sunlight is irradiated, the eyes are dazzled by the reflected light from the sun of the film, so the visibility is lost and the safety of workers is impaired. Therefore, it is necessary to make a thorough preparation for the body protection of the worker who performs the construction, and there is a problem that the workability and the construction work are inferior.
[0005]
This invention aims at providing the construction method of the membrane structure building using the film | membrane coat | covered with the surface treating agent which can perform the construction work of a membrane structure building easily in view of the above point. .
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a method for constructing a membrane structure building using a film coated with the surface treatment agent of the present invention includes a resin, a photocatalyst, and a color former, and the developed color is faded by ultraviolet irradiation. A method of constructing a membrane structure building using a surface treatment agent that changes almost transparent or colorless and transparent, and a film coated with the surface treatment agent on the surface, using a film that fades the color developed by ultraviolet irradiation, The film construction of the membrane structure building is sequentially performed during a predetermined time during which the film coated with the surface treatment agent is colored.
In the above configuration, the membrane structure building is preferably constructed by a process including a film spreading process, a film temporary fixing process, a film fixing process, and a film water-stopping process. In the above-mentioned film waterproofing finishing process, the films are preferably bonded to each other by welding using a flap film. Preferably, the resin is a fluororesin and the photocatalyst is made of titanium oxide (TiO ₂ , TiO ₃ ). Further, the surface of the film may be either a flat surface or an uneven surface. The surface of the substrate coated with the surface treatment agent is preferably hydrophobic or hydrophilic.
[0007]
According to the above configuration, since the surface treatment agent coated on the film surface is colored in a color different from that of the film after coating, this color development can be selected as a color having low sunlight reflectance. In addition, since the film can be faded after a predetermined time by irradiating ultraviolet rays such as sunlight, the surface color of the base material such as the color of the background of the film or the color decorating the film material can be changed after fading. Can be represented.
Therefore, if the construction work of the membrane structure building is performed during the predetermined time until the original color of the membrane, the reflectance of the membrane surface to sunlight is low, so the membrane structure is easy and safe to work with. Can perform construction work of buildings. At the same time, since the surface treatment agent exhibits a color different from the color of the film, uneven coating or unpainted color can be easily visually confirmed.
Moreover, since the surface treatment agent coated on the film after construction fades and becomes almost transparent or colorless and transparent, it can be used without impairing the aesthetic appearance of the coloring of the substrate.
In addition, when a photocatalyst is included in the surface treatment agent of a membrane of a membrane structure building, the membrane structure building portion having a hydrophobic or hydrophilic surface is excellent with excellent antifouling properties due to the photocatalytic photocatalyst. The aesthetics and appearance of the membrane structure building can be continued for a long period of time.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing a schematic perspective view of a membrane structure building using a membrane coated with the surface treatment agent of the present invention. In the figure, a membrane structure building 1 is configured by stretching a membrane film 4 covered with a surface treatment agent on a roof portion 3 of a framework 2 made of steel or the like. The film | membrane 4 consists of four sheets, for example, film | membrane 4a-4d. And the part used as the side wall of the membrane structure building 1 is the films | membranes 5 and 6. FIG.
The connecting portions of the membranes such as the membrane 4a and the membrane 4b are connected to each other by a membrane water stop finishing process in order to prevent water leakage. The film waterproofing finishing process is performed by a method of welding the band-shaped flap film 7 wider than the connecting portion, or a method using sheet metal, rubber or the like.
Here, the membrane structure building 1 is a public facility for transportation such as an airfield, a commercial facility such as a shopping center or an exhibition hall, a sports facility such as a warehouse or factory, a dome or a soccer stadium, an awning, a rest, a passage, etc. Includes membrane structures such as park facilities and road facilities.
[0009]
Next, the film | membrane coat | covered with the surface treating agent used for the construction method of a membrane structure building is demonstrated with reference to FIGS. FIG. 2 is a perspective view showing a state before construction of a membrane member wound with a membrane coated with a surface treatment agent used in the present invention.
As shown in the figure, in the membrane member 20, a membrane 10 whose surface is coated with a surface treatment agent is wound around a core material 21 such as a paper tube or a steel tube in a cylindrical shape, that is, in a roll shape. As will be described later, the surface treatment agent coated on the surface of the film 10 is colored in a color different from the surface color of the film after coating, and the film member 20 is irradiated with ultraviolet rays such as sunlight for a predetermined time. Since it fades after elapse, it is wound immediately after production and is preferably stored in a dark place. If it is necessary to store the film member 20 for a predetermined period until the film construction, the film member 20 may be wrapped with a light-shielding resin film or the like after winding so that the color development on the surface does not progress.
[0010]
FIG. 3 is a cross-sectional view showing the structure of a film coated with the surface treatment agent used in the present invention. As shown in FIG. 3, the membrane 10 is coated with a surface treatment agent 15 using a resin such as a fluororesin at a predetermined portion of the membrane material 12 made of this cloth or fiber reinforced resin. In the case of FIG. 3, as an example, a structure in which the surface treatment agent 15 is coated on both surfaces of the film material 12 is shown. However, depending on the purpose of use and the like, only one surface of the film material 12 or a predetermined region on the surface is used. Of course, the surface treatment agent 15 may be covered.
As the film material 12, various materials such as resin such as plastic and woven fabric made of various materials are applied, and the shape thereof may be arbitrary. Examples of the membrane material 12 include a fabric 13 made of glass fiber, polyester fiber, nylon fiber, cotton, hemp, etc., fluorine resin, PVC (polyvinyl chloride), PU (polyurethane), chlorosulfonated polyethylene rubber, chloroprene. Materials such as cloth or belt coated with a resin 14 selected from rubber such as rubber can be used.
In the resin 14, as the fluororesin, a polymer of fluororesin monomer such as polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), tetrafluoroethylene-hexafluoropropylene copolymer (FEP) is used. Can do.
Here, also in the case of the sheet | seat used for a film | membrane structure, the surface shape of the film | membrane material 2 can apply any of flat, the uneven | corrugated surface which is not flat, and mesh shape.
[0011]
FIG. 4 is an enlarged cross-sectional view showing the structure of the surface side after the film coated with the surface treating agent 15 used in the present invention is manufactured.
The photocatalysts 17 and 18 are photocatalyst fine particles such as anatase TiO ₂ (titanium dioxide) having a diameter of 1 nm to 100 nm, for example, and the photocatalyst fine particles in the fluororesin 16 and the photocatalyst exposed on the surface 16a of the fluororesin, respectively. Fine particles are shown. In order to increase the photocatalytic effect, it is desirable that the particle diameters of the photocatalysts 17 and 18 are appropriately small in order to increase the area of the photocatalyst 18 exposed on the surface 16a of the surface treatment agent 15.
For example, the surface treatment agent 15 is composed of a solution composed of a dispersant containing a photocatalyst 17, 18 and a color former 19 mainly composed of a fluororesin 16 such as PTFE or PVDF.
The surface treatment agent 15 is applied to the surface of the resin 14 applied to the fabric 13 constituting the film material 12 and, when coated by a drying or sintering process, develops a color different from the ground color of the resin 14. Coloring agent 19 is selected.
[0012]
Here, the photocatalysts 17 and 18 are materials also called optical semiconductors. Photocatalysts 17 and 18 include anatase TiO ₂ (forbidden band width 3.2 eV, wavelength 388 nm), rutile TiO ₂ (forbidden band width 3.0 eV, wavelength 414 nm), titanium trioxide (TiO ₃ ), and the like. Can be used. These titanium oxides are collectively referred to as titanium oxide.
[0013]
Further, the color former 19 for coloring the surface treatment agent can be determined according to the color to be applied, and is an azo dye, quinone-imine dye, xanthene dye, phenylmethane dye, xanthene dye, thiazole dye, cyanine dye. Oxonol dyes, merocyanine dyes, styryl dyes, neutral dyes, and natural dyes such as chlorophyll and beta-carotene can be used.
Apart from this, as the color former 19, it is possible to utilize the fact that an organic dispersant, a surfactant or the like contained in the dispersant as the main component of the surface treatment agent 15 develops color by drying or sintering. In this case, the dispersant component other than the resin of the surface treatment agent 15 and the photocatalyst also serves as the color former 19. Thus, in this specification, the color former is used as a concept including a dye and a material used for a dispersant other than the resin and the photocatalyst included in the surface treatment agent. Further, the color or color by color development is not limited to a chromatic color, but includes a white or black achromatic color.
[0014]
The amount of the photocatalyst to be included in the surface treatment agent 15 is arbitrary, but the viscosity of the solution may be appropriately adjusted depending on the application, performance, and coating method. The blending amount of the photocatalysts 17 and 18 when the thermal bonding performance to the film material 12 is required may be 30 to 50% by weight as the solid concentration component amount in the surface treatment agent 15.
Depending on the amount of photocatalyst contained in the surface treatment agent 15, the surface of the film material coated with the surface treatment agent can be made hydrophobic or hydrophilic.
Further, in order to further impart the conductivity and photocatalytic effect enhancement effect to the surface treatment agent 15 containing the fluororesin, a metal material or a photocatalytic function auxiliary substance may be added. As the metal material, Ag, Al, Au, Cu, Fe, In, Ir, Ni, Os, Pd, Pt, Rh, Ru, Zu, Sb, Sn, Zu, or the like can be used.
[0015]
Next, the construction method of the membrane structure building using the film | membrane coat | covered with the surface treating agent of this invention is demonstrated. FIG. 5 is a flowchart for explaining a method of constructing a membrane structure building using a membrane coated with the surface treatment agent of the present invention.
Taking the membrane structure building shown in FIG. 1 as an example, in a scaffold provided around the roof portion 3, the construction worker spreads the membrane of the membrane member 20 and deploys it to a predetermined place, that is, performs a membrane stretching process. (See FIG. 5A).
[0016]
Next, as shown in FIG. 5 (B), the end of the membrane member 20 is temporarily fixed at a predetermined interval at a predetermined portion of the framework 2 of the roof portion 4 of FIG. This film temporary fixing process is performed as follows. The end of the membrane member 20 is stretched so as to follow the shape of the roof portion 4 by holding the end of the membrane member 20 with a jig at a predetermined interval, and the construction worker pulling the jig with a wire tensioner. Is done.
As another method of the film temporary fixing process, a method in which the end of the film member 20 is temporarily overwound with a rope and a construction worker pulls the rope can be applied.
[0017]
Next, as shown in FIG. 5C, a film fixing process of the film member 20 is performed. This is a construction process in which the end of the membrane member 20 is tightened with a torque wrench to a predetermined portion of the frame of the roof portion 4 with a bolt and a nut so as to have a predetermined torque, and is finally tightened. When the rope is used, this film fixing step is performed by connecting the end portion of the rope to a predetermined portion of the frame of the roof portion 4. After the film fixing step is completed, when the jig for temporarily fixing the film is removed, the films 4a to 4d are attached and fixed to the roof portion 4 of the film structure building.
[0018]
Next, as shown in FIG. 5 (D), a film waterproofing finishing process is performed in which a waterproofing finish is performed at the connection portion between the films (see 7 in FIG. 1). In the film waterproofing finishing process, when the flap film 7 is used, a scaffold is first provided on the frame film of the roof portion 4. Next, the adjacent end portions of the film member 20 are overlapped with an adhesive tape to temporarily fix the connection portions, and then a flap film is welded to the required portions of the films 3a to 3d. Here, welding of the flap film 7 is performed using a welding machine. The membrane water stop finishing process is performed from the top of the roof portion 4 to the bottom.
Another method of the film water-stop finishing step is a method in which a connection part between the films is performed using a sheet metal. In this case, in the same manner as the flap film process, in the scaffolding provided on the frame film of the roof portion 4, by using a power drill to strike the screw on the base film after provisional alignment with the base film. The membrane is fixed by sheet metal.
[0019]
The feature of the present invention is that the film construction process of the film structure building shown in FIG. 5 is performed within the time or period in which the surface of the film coated with the surface treatment agent is colored in a predetermined color.
The surface of the film 4 produced by applying a surface treatment agent on the surface and drying or sintering it is not exposed to sunlight or exposed to light such as an ultraviolet lamp or a fluorescent lamp for a long time, that is, In the state where the ultraviolet ray is not irradiated, the surface treatment agent 15 to which the color former 19 is added maintains the color developed in the color of the color former. Therefore, if the color of the surface treatment agent 15 coated with the film is brown or the like where the reflectance of sunlight is lowered, it is suitable for outdoor construction work.
Here, when the film 4 coated with the surface treatment agent is irradiated with ultraviolet rays by exposing it to light containing ultraviolet rays such as sunlight, the ultraviolet rays directly decompose the color former 19 to gradually fade the color. Further, by irradiating the photocatalysts 17 and 18 contained in the surface treatment agent with ultraviolet rays, the color former 19 is decomposed and faded by the oxidation and reduction reactions of the photocatalyst. In this case, when the photocatalyst is titanium oxide, the wavelength of the ultraviolet light may be approximately 400 nm or less.
Thereby, after the light irradiation for a predetermined time, the color of the surface treatment agent can be made transparent or almost transparent. In addition to sunlight, ultraviolet rays are also effective as ultraviolet rays emitted from fluorescent lamps.
[0020]
Thus, if the worker who performs the membrane construction of the membrane structure building performs the membrane construction work for a predetermined time until the color fading, the reflectance from the sunlight on the membrane surface is low, so the membrane construction is safe. Can perform construction work on objects.
Further, the surface of the membrane of the membrane structure building fades after the completion of the construction work, and the color of the membrane used for the membrane structure returns to the original color of the membrane, so that the aesthetic appearance and appearance are not impaired. Furthermore, the surface of the membrane of the membrane structure is not easily soiled due to the self-cleaning effect of the photocatalyst contained in the surface treatment agent 15 coated on the membrane, so that the aesthetics and appearance of the membrane structure building are continued for a long period of time. Can be made.
[0021]
Next, the Example of the construction method of the membrane structure building using the film | membrane coat | covered with the surface treating agent of this invention is described.
First, a membrane member used for a membrane structure building will be described.
As the membrane 4, a membrane material (FGT600: manufactured by Chuko Kasei Kogyo Co., Ltd.) in which both surfaces of glass fiber are coated with fluororesin (PTFE) was used. As the surface treatment agent 15, a dispersant shown below having a composition containing a fluororesin (FEP) as a main component and including a photocatalyst was used.
50 g of an aqueous dispersant (solid content 28 wt%) of anatase type TiO ₂ powder (ST01 made by Ishihara Sangyo) having a particle size of 1 nm to 100 nm, 100 g of purified water, and an aqueous dispersant consisting of FEP (solid content 58 wt%). Prepare a material consisting of 36.2 g, 1.7 g of silicon-based surfactant (1% by weight of the total), mix and stir these materials, and disperse the surface treatment agent 15 (FEP and oxidation) The weight ratio of titanium powder is 60:40). This dispersant was a cloudy solution.
[0022]
The fluororesin film on the surface of the film material (FGT600: manufactured by Chuko Kasei Kogyo Co., Ltd.) is wiped with Kim towel (manufactured by Crecia Co., Ltd.) impregnated with an appropriate amount of ethylene alcohol, and naturally dried at room temperature. Was applied to the entire surface of one side. The coating film was naturally dried at room temperature, dried at 60 ° C. for 5 minutes, naturally cooled, then further heated and fired at 380 ° C. for 10 minutes, and then naturally cooled.
While maintaining the dispersibility of the photocatalyst material and the surface treatment agent 15 included in the material constituting the FEP dispersion medium in the solution, the surface treatment agent 15 is heated by the heat of the drying step or the sintering step after coating. The color was developed. This color was brown and could easily be visually distinguished from the milky white fluororesin on the surface of the membrane material (FGT600: manufactured by Chuko Kasei Kogyo). The surface treatment agent 15 is a cloudy solution before application. Therefore, this brown color development is caused by the organic matter contained in the photocatalyst aqueous dispersant or FEP aqueous dispersant contained in the surface treatment dispersant during the drying or sintering step of the surface treatment agent. It is presumed that color is developed by a color former such as.
[0023]
Next, an example of construction of a membrane structure building using the membrane member will be described.
Example 1
The membrane construction process shown in FIG. 5 for a membrane structure building having a roof portion with an area of about 250 m ² using a membrane member having a winding width of 7 m and a length of 40 m was completed in one day. During this work period, the surface of the membrane member was brown. The color development on the film surface faded after about one month.
[0024]
(Example 2)
Membrane construction was performed in which the area of the roof portion of the membrane structure building was about 2500 m ² . The membrane member wound around the steel pipe has a winding width of 22 m and a length of 40 m. The three membrane members were lifted by a crane to perform a film spreading process, and two days were required for the film temporary fixing process and the film fixing process.
Next, a flap film welding process was performed from the third day to the sixth day (four days), and the entire process was performed in six days.
Since the resin on the surface of the film and the underlying resin are respectively FEP formed by the surface treatment agent and PTFE coated on the glass fiber, it is possible to perform good thermal bonding between the films in the flap film welding process. did it. During the construction work period, the surface of the membrane member changed from brown to light brown, but the construction of the membrane structure building could be performed safely.
[0025]
FIG. 6 is a surface photograph showing the color change in the outdoor of the membrane member surface from the start of construction in Example 1 and Example 2. FIG. 6 (A) is a surface photograph immediately after production, (B) is 2 days later, (C) is 6 days later, and (D) is a surface photograph after 2 weeks.
The color development immediately after production of the membrane member and 2 weeks after outdoor exposure is brown and cream, respectively. The color change on the surface of the membrane member almost faded after 7 weeks (not shown), and the color of the membrane used for the membrane structure returned to the original color of the membrane, and the aesthetics and appearance were not impaired.
In the membrane structure building of Example 2, no stain was found in the visual inspection after 6 months had passed since the completion of construction.
Thus, the surface of the membrane of the membrane structure is maintained for a long period of time by the photocatalytic self-cleaning effect included in the surface treatment agent 15 covered with the membrane of the membrane structure. can do.
[0026]
FIG. 7 is a diagram showing measurement results of the reflectance and color difference (ΔE) of the film member surface from the start of construction in Example 2. Here, a part of the membrane member of Example 2 was cut out as a sample, and after the start of construction, the sample exposed outdoors at the construction site was measured. The horizontal axis in the figure is the outdoor exposure time, the left vertical axis is the reflectance (%), and the right vertical axis is the color difference (ΔE). Said measurement was performed by the method based on JIS standard Z8701 and Z8730, and measured in the visible light region (380 nm-780 nm) using the self-recording spectrophotometer (Hitachi U-3410 type).
[0027]
As shown in the figure, it can be seen that the reflectance is about 26% immediately after the start of the construction, becomes almost 70% in two weeks, and then becomes saturated. It can be seen that the color difference (ΔE) also changes in the same manner as the reflectance. From this, it can be seen that in the film member used in the example, the color developed for about one week and the reflectance decreased.
[0028]
The method of constructing a membrane structure building using the film coated with the surface treatment agent according to the present invention is configured as described above, and the surface of the film coated with the surface treatment agent is the original color of the film during the construction period. It can be a color different from that of, for example, brown having a low reflectance with respect to sunlight.
Therefore, the construction work can be performed safely, and the color of the film surface is faded after the construction, so that the original color of the film is restored and the beauty and appearance are not impaired. Further, since the photocatalyst contained in the film surface treatment agent is not easily contaminated by the self-cleaning effect, the appearance and appearance of the completed film structure building can be continued for a long period of time.
[0029]
The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the invention described in the claims, and it goes without saying that these are also included in the scope of the present invention. . For example, the surface treatment agent for membranes described in the above embodiment is the color of the color depending on the purpose of the membrane structure building, the period from color development to color fading according to the membrane area of the membrane structure building and the construction period. It goes without saying that the setting of can be adjusted as appropriate.
[0030]
【The invention's effect】
As described above, according to the present invention, since the surface of the film coated with the surface treatment agent is colored in a predetermined color during the construction period, it is possible to safely perform the construction work of the membrane structure of the membrane structure building. In addition, the surface of the film is faded after construction, so that the original color of the film is restored and the beauty and appearance are not impaired.
Furthermore, since the photocatalyst contained in the surface treatment agent of the film is less likely to become dirty due to the self-cleaning effect, the appearance and appearance of the membrane structure building can be continued for a long period of time.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a membrane structure building using a membrane coated with a surface treatment agent of the present invention.
FIG. 2 is a perspective view showing a state before construction of a membrane member wound with a membrane coated with a surface treatment agent used in the present invention.
FIG. 3 is a cross-sectional view showing the structure of a film coated with a surface treatment agent used in the present invention.
FIG. 4 is an enlarged cross-sectional view showing the structure of the surface side of the film coated with the surface treating agent used in the present invention.
FIG. 5 is a flowchart for explaining a construction method of a membrane structure building using a membrane coated with the surface treatment agent of the present invention.
FIG. 6 is a surface photograph showing the color change of the membrane member surface outdoors from the start of construction in Example 1 and Example 2.
7 is a diagram showing measurement results of reflectance and color difference (ΔE) on the surface of a film member from the start of construction in Example 2. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Membrane structure building 2 Frame 3 Roof part 4 Membrane 5 and 6 coated with surface treatment agent Side wall 7 Flap membrane 10 Membrane coated with surface treatment agent containing fluororesin 12 Membrane 13 Fabric 14 Resin 15 Surface treatment agent 15A Immediately after the surface treatment agent 16 Fluororesin 17 Photocatalyst 18 in the fluororesin Photocatalyst 19 exposed on the surface of the fluororesin 19 Dye 20 Film member 21 Core material

Claims (8)

A surface treatment agent comprising a resin, a photocatalyst, and a color former, and the developed color fades upon irradiation with ultraviolet rays and changes to almost transparent or colorless and transparent,
It consists of a film coated with the surface treatment agent on the surface,
When constructing a membrane structure building by fading the color due to color development of the surface treatment agent applied to the membrane surface by ultraviolet irradiation,
Construction of a membrane structure building using a membrane coated with a surface treatment agent, characterized in that the membrane construction of the membrane structure building is performed during a predetermined time when the membrane coated with the surface treatment agent is colored. Method. 2. The surface according to claim 1, wherein the membrane structure building is constructed by a process including a film spreading process, a film temporary fixing process, a film fixing process, and a film water-stop finishing process. A construction method of a membrane structure building using a membrane coated with a treatment agent. The method for constructing a membrane structure building using a film coated with a surface treatment agent according to claim 2, wherein the films are joined together by welding using a flap film in the film waterproofing finishing step. . The construction of a membrane structure building using a film coated with a surface treatment agent according to claim 1, wherein the resin is a fluororesin and the photocatalyst is made of titanium oxide (TiO ₂ , TiO ₃ ). Method. The surface of the said film | membrane is a plane, The construction method of the membrane structure building using the film | membrane coat | covered with the surface treating agent in any one of Claims 1-4 characterized by the above-mentioned. The method of constructing a membrane structure building using a film coated with a surface treatment agent according to any one of claims 1 to 4, wherein the surface of the film is an uneven surface. The method of constructing a membrane structure building using a membrane coated with a surface treatment agent according to any one of claims 1 to 6, wherein the surface of the membrane becomes hydrophobic after coating with the surface treatment agent . The method for constructing a membrane structure building using a film coated with a surface treatment agent according to any one of claims 1 to 6, wherein the surface of the membrane becomes hydrophilic after coating with the surface treatment agent. .

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