JP2000262905A - Photocatalytic tile - Google Patents
Photocatalytic tileInfo
- Publication number
- JP2000262905A JP2000262905A JP11074056A JP7405699A JP2000262905A JP 2000262905 A JP2000262905 A JP 2000262905A JP 11074056 A JP11074056 A JP 11074056A JP 7405699 A JP7405699 A JP 7405699A JP 2000262905 A JP2000262905 A JP 2000262905A
- Authority
- JP
- Japan
- Prior art keywords
- tile
- photocatalyst
- photocatalytic
- state
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 29
- 239000011941 photocatalyst Substances 0.000 claims abstract description 44
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 7
- 238000004140 cleaning Methods 0.000 abstract description 5
- -1 Zr2O Chemical class 0.000 abstract description 4
- 230000003796 beauty Effects 0.000 abstract description 4
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 3
- 150000004706 metal oxides Chemical class 0.000 abstract description 3
- 238000013032 photocatalytic reaction Methods 0.000 abstract description 2
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 abstract 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 abstract 2
- 229910002370 SrTiO3 Inorganic materials 0.000 abstract 1
- 229910008198 Zr2O Inorganic materials 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten(VI) oxide Inorganic materials O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 15
- 229910010413 TiO 2 Inorganic materials 0.000 description 12
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 6
- 229960000907 methylthioninium chloride Drugs 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 3
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 150000004703 alkoxides Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 229910002367 SrTiO Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910007541 Zn O Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- XGZNHFPFJRZBBT-UHFFFAOYSA-N ethanol;titanium Chemical compound [Ti].CCO.CCO.CCO.CCO XGZNHFPFJRZBBT-UHFFFAOYSA-N 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- ZEIWWVGGEOHESL-UHFFFAOYSA-N methanol;titanium Chemical compound [Ti].OC.OC.OC.OC ZEIWWVGGEOHESL-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001443 photoexcitation Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Surface Treatment Of Optical Elements (AREA)
- Laminated Bodies (AREA)
- Catalysts (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、タイル表面に光触
媒を設けてなる光触媒タイルに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photocatalytic tile in which a photocatalyst is provided on a tile surface.
【0002】[0002]
【従来の技術】鏡やレンズ、板ガラス等の透明基材の表
面を高度に親水化することにより、基材の曇りや水滴形
成を防止することを目的として、或いは、建材や機械装
置或いは各種物品の表面を高度に親水化することによ
り、表面の汚れを防止し、表面の自己浄化(セルフクリ
ーニング)機能を付与すると共に、汚れを落とし易くし
て清掃を容易にするために、基材表面に光触媒性チタニ
ア(TiO2)等の光触媒性被膜を形成することが行わ
れている(特開平9−241038号公報、国際公開W
O96/29375、特開昭61−83106号公
報)。光触媒性チタニア等の光触媒機能を有する物質
は、光励起による親水化効果で基材表面を高度に親水化
し、水滴の形成を防止して、光の散乱による曇りを防止
する。また、親油性成分を多く含む汚れが付着し難くな
ると共に、表面の自己浄化及び作用が得られ、付着した
汚れも落ち易くなる。また、光触媒効果でNOxやSO
xあるいは有機物の分解が促進されることによっても上
記効果が高められる。2. Description of the Related Art For the purpose of preventing the fogging and water droplet formation of a base material by making a surface of a transparent base material such as a mirror, a lens, a plate glass or the like highly hydrophilic, or a building material, a mechanical device or various articles. The surface of the substrate is highly hydrophilized to prevent surface contamination and to provide a self-cleaning (self-cleaning) function of the surface. Formation of a photocatalytic film such as photocatalytic titania (TiO 2 ) has been performed (Japanese Patent Application Laid-Open No. 9-241038, International Publication W).
O96 / 29375, JP-A-61-83106). A substance having a photocatalytic function such as photocatalytic titania makes the surface of a base material highly hydrophilic by a hydrophilizing effect by photoexcitation, prevents formation of water droplets, and prevents clouding due to light scattering. In addition, dirt containing a large amount of lipophilic component is less likely to adhere, and self-cleaning and action of the surface is obtained, so that the adhered dirt is more easily removed. In addition, NOx and SO
The above effect is also enhanced by promoting the decomposition of x or organic substances.
【0003】このような光触媒機能を有する膜の形成方
法として、特開平9−241038号公報及び国際公開
WO96/29375には、TiO2粒子を含む懸濁液
の塗布、焼成によるゾルゲル法が記載されている。ま
た、特開昭61−83106号公報には被膜形成法とし
てCVDが記載されている。As a method for forming such a film having a photocatalytic function, JP-A-9-241038 and International Publication WO96 / 29375 describe a sol-gel method by applying and baking a suspension containing TiO 2 particles. ing. Japanese Patent Application Laid-Open No. 61-83106 describes CVD as a method for forming a film.
【0004】[0004]
【発明が解決しようとする課題】従来の光触媒タイルに
あっては、光触媒をなるべく均一厚さの薄膜状に形成し
ているが、本発明者らが種々検討を重ねたところ、タイ
ル表面に光触媒を均一厚さの薄膜状に形成してタイル表
面の全面を覆うと、タイルの釉薬層の独特の質感が損な
われることがあることが認められた。In the conventional photocatalyst tile, the photocatalyst is formed in a thin film having a uniform thickness as much as possible. It has been found that, when is formed into a thin film of uniform thickness and covers the entire surface of the tile, the unique texture of the glaze layer of the tile may be impaired.
【0005】本発明は、タイルの地肌の質感ないし美感
を生かした光触媒タイルを提供することを目的とする。[0005] It is an object of the present invention to provide a photocatalytic tile utilizing the texture or beauty of the background of the tile.
【0006】[0006]
【課題を解決するための手段】本発明の光触媒タイル
は、表面に光触媒を設けてなる光触媒タイルにおいて、
該光触媒を線状及び/又は点状にタイル表面に設けたこ
とを特徴とするものである。According to the present invention, there is provided a photocatalytic tile having a photocatalyst provided on a surface thereof.
The photocatalyst is provided on the tile surface in a linear and / or dot form.
【0007】かかる光触媒タイルにあっては、光触媒を
線状及び/又は点状にタイル表面に設けており、タイル
表面の一部が露出状となっているので、この露出状部分
がタイル本来の質感や美感を醸し出すようになる。In such a photocatalyst tile, the photocatalyst is provided on the tile surface in a linear and / or dot shape, and a part of the tile surface is exposed. It brings out the texture and beauty.
【0008】本発明では、タイル表面の40〜90%を
露出させるように光触媒を設けるのが好ましい。In the present invention, it is preferable to provide a photocatalyst so as to expose 40 to 90% of the tile surface.
【0009】本発明では、光触媒を線状に設ける場合、
この線状を曲線状(リング状を含む。)あるいは網目状
とするのが好ましい。光触媒が曲線状或いは網目状であ
る場合、光がどの方向からタイル表面に当っても光触媒
反応が十分に進行する。In the present invention, when the photocatalyst is provided linearly,
The linear shape is preferably a curved shape (including a ring shape) or a mesh shape. When the photocatalyst has a curved shape or a mesh shape, the photocatalytic reaction sufficiently proceeds regardless of the direction from which light strikes the tile surface.
【0010】[0010]
【発明の実施の形態】以下に本発明の実施の形態を詳細
に説明する。Embodiments of the present invention will be described below in detail.
【0011】本発明において、タイル表面に形成する光
触媒としては、TiO2の他、ZrO2、ZnO2、Zn
O、SnO2、WO3、Bi2O3、SrTiO3、Fe2O
3、V2O5等の金属酸化物が挙げられる。これらの金属
酸化物は1種を単独で用いても良く、また2種以上を併
用しても良いが、これらの中でもTiO2が最も好まし
い。In the present invention, the photocatalyst formed on the tile surface includes, in addition to TiO 2 , ZrO 2 , ZnO 2 , Zn
O, SnO 2 , WO 3 , Bi 2 O 3 , SrTiO 3 , Fe 2 O
3 , metal oxides such as V 2 O 5 . One of these metal oxides may be used alone, or two or more thereof may be used in combination. Of these, TiO 2 is most preferred.
【0012】この光触媒をタイル表面に線状及び/又は
点状に付着させるには、適宜のマスクを用いたり、印刷
スクリーンなどにより光触媒形成用液(溶液、懸濁液な
ど)をタイル表面に付着させ、その後必要に応じ乾燥
し、焼成すれば良い。In order to attach the photocatalyst to the tile surface in a linear and / or dot form, an appropriate mask is used, or a photocatalyst forming liquid (solution, suspension, etc.) is applied to the tile surface by a printing screen or the like. After that, it may be dried and fired if necessary.
【0013】マスクやスクリーンを用いることなく、光
触媒形成用の液をタイル表面に筋状に流したり散点状に
吹き付けることにより線状及び/又は点状に該液を付着
させても良い。Without using a mask or a screen, the photocatalyst-forming liquid may be applied to the tile surface in a streak form or sprayed in a scattered manner to adhere the liquid in a linear and / or dot form.
【0014】タイル表面に曲線状或いは網目状に光触媒
を設けるには、光触媒形成用の液に必要に応じ界面活性
剤等の起泡剤を添付して該液中に気体(例えば空気)を
吹き込んで泡を発生させ、この泡をタイル表面に付着さ
せる方法を採用することができる。この場合、泡を構成
する液分がタイル表面に線状に残留し、曲線状ないし網
目状の光触媒パターンが形成される。液が独立した球状
気泡となっている場合、この気泡をタイル表面に付着さ
せることによりリング状パターンにて光触媒を設けるこ
とができる。In order to provide a photocatalyst in a curved or mesh form on the tile surface, a foaming agent such as a surfactant is attached to the photocatalyst forming liquid as necessary, and a gas (for example, air) is blown into the liquid. To generate bubbles and adhere the bubbles to the tile surface. In this case, the liquid component constituting the foam remains linearly on the tile surface, and a curved or meshed photocatalytic pattern is formed. When the liquid is an independent spherical bubble, the photocatalyst can be provided in a ring-shaped pattern by attaching the bubble to the tile surface.
【0015】光触媒が点状或いは網目状に設けられた場
合にはタイルの光触媒機能は等方的となり、いかなる方
向から光が照射された場合でも同等の光触媒機能が発揮
される。When the photocatalyst is provided in a dot or mesh pattern, the photocatalytic function of the tile becomes isotropic, and the same photocatalytic function is exhibited even when light is irradiated from any direction.
【0016】これに対し、例えば一方向に配向した直線
状に光触媒を設けた光触媒タイルにあっては、光の照射
方向によって光触媒機能に異方性が生じることがある。
即ち、光触媒を直線状に且つ一方向に配向して設けた場
合、光触媒の線状部はあたかも一方向に延在した山脈状
に配列することになる。光がこの山脈状の光触媒に斜め
に照射される場合、山脈の山陽側では光が十分に当り光
触媒機能が比較的高いが山陰側では照射光量が少なくな
り光触媒機能が比較的低くなる。また、光が山脈の配向
方向に沿って照射される場合には、光触媒の全体に満遍
なく光が当り、全体として高い光触媒機能が発揮され
る。On the other hand, for example, in a photocatalyst tile provided with a photocatalyst linearly oriented in one direction, anisotropy may occur in the photocatalytic function depending on the direction of light irradiation.
That is, when the photocatalysts are provided linearly and oriented in one direction, the linear portions of the photocatalysts are arranged in a mountain-like shape extending in one direction. When light is radiated obliquely to this mountain-shaped photocatalyst, light is sufficiently incident on the Sanyo side of the mountain range, and the photocatalytic function is relatively high, but on the San'in side, the amount of irradiated light is small and the photocatalytic function is relatively low. Further, when the light is irradiated along the orientation direction of the mountain range, the light uniformly hits the entire photocatalyst, and a high photocatalytic function is exhibited as a whole.
【0017】このようなことから、光が常に特定方向の
みから照射される用途に用いられる光触媒タイルは、光
触媒が点状又は網目状に設けられることが好ましい。In view of the above, it is preferable that the photocatalyst tile used for the purpose of always irradiating the light only from a specific direction is provided with the photocatalyst in a dot shape or a mesh shape.
【0018】本発明では、タイル表面のうち20〜90
%とくに好ましくは50〜80%が露出するように光触
媒を設けるのが好ましい。このように光触媒を線状及び
/又は点状に設けタイル表面の地肌の一部を露出させる
ことにより、タイル本来の質感ないし美感が損なわれ
ず、タイルの意匠性が良好なものとなる。In the present invention, 20 to 90 of the tile surface
It is preferable to provide a photocatalyst such that 50% to 80% is exposed. By providing the photocatalyst in a linear and / or dot form and exposing a part of the background of the tile surface, the original texture or beauty of the tile is not impaired, and the tile design becomes good.
【0019】とくに、線状の幅を0.5〜2.0μm程
度としたり、点状の直径を0.5〜30μm程度とした
場合、タイルの釉の色が黒色系ないし濃い有彩色であっ
ても、光触媒の白い筋や点がマダラ状に視覚されること
が無くなり、タイルの意匠性が著しく良好なものとな
る。In particular, when the line width is about 0.5 to 2.0 μm or the dot diameter is about 0.5 to 30 μm, the color of the tile glaze is black or dark chromatic. Even so, white streaks and points of the photocatalyst are not visually observed in a pillow-like manner, and the design of the tile is significantly improved.
【0020】TiO2の付着量としては、タイル表面の
単位面積(1cm2)当り3〜24μgとくに6〜15
μg程度が好ましい。The adhesion amount of TiO 2 is 3 to 24 μg per unit area (1 cm 2 ) of the tile surface, particularly 6 to 15 μm.
About μg is preferable.
【0021】上記の光触媒形成用の液としては、例えば
次の(1)〜(3)のものを用いることができる。As the liquid for forming the photocatalyst, for example, the following liquids (1) to (3) can be used.
【0022】(1) 有機チタン化合物の加水分解液又は
部分加水分解液 この有機チタン化合物としては、チタンのアルコキシ
ド、例えば、テトラエトキシチタン、テトライソプロポ
キシチタン、テトラn−プロポキシチタン、テトラブト
キシチタン、テトラメトキシチタンなどが例示される。
このアルコキシドを塩酸又はエチルアミンのような加水
分解抑制剤を添加し、エタノールやプロパノールのよう
なアルコールで希釈した後、部分的に加水分解を進行さ
せながら又は完全に加水分解させた液を光触媒形成用液
として用いる。(1) Hydrolyzate or partial hydrolyzate of an organotitanium compound As the organotitanium compound, an alkoxide of titanium, for example, tetraethoxytitanium, tetraisopropoxytitanium, tetra-n-propoxytitanium, tetrabutoxytitanium, Examples include tetramethoxytitanium.
After adding a hydrolysis inhibitor such as hydrochloric acid or ethylamine to this alkoxide and diluting it with an alcohol such as ethanol or propanol, a solution obtained by partially or completely hydrolyzing the hydrolysis is used for forming a photocatalyst. Use as a liquid.
【0023】(2) 無機チタン化合物の溶液 例えばTiCl4、Ti(SO4)2等の無機化合物の水
溶液好ましくは酸性水溶液が例示される。(2) Solution of inorganic titanium compound An aqueous solution of an inorganic compound such as TiCl 4 and Ti (SO 4 ) 2, preferably an acidic aqueous solution is exemplified.
【0024】(3) 酸化チタン微粒子の分散液 この微粒子を必要に応じ分散剤を用いて水に分散させた
液が例示される。水の代わりに有機液状体を用いても良
い。(3) Dispersion of titanium oxide fine particles A liquid in which the fine particles are dispersed in water using a dispersant as needed is exemplified. An organic liquid may be used instead of water.
【0025】上記(1)〜(3)はTiO2に関するも
のであるが、SiO2など他の成分をさらに含有してい
ても良い。Although the above (1) to (3) relate to TiO 2 , other components such as SiO 2 may be further contained.
【0026】このような光触媒形成用液をタイル表面に
線状及び/又は点状に付着させた後、必要に応じ乾燥さ
せ、次いで500〜900℃で焼成し結晶化させると共
にTiO2成分とタイルの表面の釉薬とを固着させるの
が好ましい。この結晶化により光触媒機能が高まる。ま
た、ガラス状の釉薬とTiO2成分(例えばTiO2微粒
子)とが固着することにより光触媒の耐久性が向上す
る。After the photocatalyst forming liquid is adhered to the tile surface in a linear and / or dot form, it is dried if necessary, and then calcined at 500 to 900 ° C. to crystallize the TiO 2 component and the tile. It is preferable to fix the glaze on the surface. This crystallization enhances the photocatalytic function. In addition, the glass catalyst glaze adheres to the TiO 2 component (for example, TiO 2 fine particles), thereby improving the durability of the photocatalyst.
【0027】[0027]
【実施例】以下に実施例及び比較例を挙げて本発明をよ
り具体的に説明する。The present invention will be described more specifically below with reference to examples and comparative examples.
【0028】実施例1 チタンテトライソプロポキシド5g、水93g、6N塩
酸2gを混合し、これに界面活性剤として陰イオン系界
面活性剤を1g添加した後、空気を吹き込んで泡を発生
させた。この泡25mgをすくいとり、タイル(株式会
社イナックス製の施釉外装タイル。色調白色。9.5×
4.5×0.7cm)の表面に付着させた後、乾燥さ
せ、次いで600℃×30minの焼成を行った。この
結果、タイルの表面の1cm2当り平均して8μgのT
iO2が付着した光触媒タイルが得られた。Example 1 5 g of titanium tetraisopropoxide, 93 g of water and 2 g of 6N hydrochloric acid were mixed, and 1 g of an anionic surfactant was added as a surfactant, and then air was blown to generate foam. . Take 25 mg of this foam and scoop up the tile (glazed exterior tile manufactured by Inax Corporation. Color tone white. 9.5 ×
(4.5 × 0.7 cm), dried, and then baked at 600 ° C. for 30 min. This resulted in an average of 8 μg of T / cm 2 on the tile surface.
A photocatalytic tile to which iO 2 was attached was obtained.
【0029】顕微鏡にて観察したところ、タイル表面に
は幅0.5μmのTiO2が網目状に延在していること
が認められた。また、タイル地肌のうち80%が露出し
ていることが認められた。Observation with a microscope revealed that TiO 2 having a width of 0.5 μm extended in a mesh pattern on the tile surface. Further, it was recognized that 80% of the tile background was exposed.
【0030】このタイルの外観は、TiO2を付着させ
てない施釉外装タイルと全く同一であった。The appearance of this tile was exactly the same as the glazed exterior tile to which TiO 2 was not attached.
【0031】このタイルの光触媒能について次の通り試
験した。即ち、メチレンブルーの0.01wt%水溶液
5μlをこのタイルの表面に滴下し、乾燥後、紫外線ラ
ンプを2mW/cm2のUV強度になるように照射し
た。タイル表面のメチレンブルー残留量を分光光度計を
用い青色光の反射率として経時的に計測し、初期量の半
分量になるまでの照射時間(以下、メチレンブルー半減
期という。)を計測する。The photocatalytic activity of this tile was tested as follows. That is, 5 μl of a 0.01 wt% aqueous solution of methylene blue was dropped on the surface of the tile, dried, and irradiated with an ultraviolet lamp so as to have a UV intensity of 2 mW / cm 2 . The residual amount of methylene blue on the tile surface is measured over time using a spectrophotometer as the reflectance of blue light, and the irradiation time until the amount becomes half the initial amount (hereinafter, referred to as methylene blue half-life) is measured.
【0032】試験の結果、この実施例1のタイルのメチ
レンブルー半減期は60minであることが認められ
た。As a result of the test, it was confirmed that the methylene blue half-life of the tile of Example 1 was 60 minutes.
【0033】比較例1 実施例1の液約50mgを上記施釉外装タイルの表面に
ハケ塗りした他は同様にして光触媒タイルを製造した。
その結果、メチレンブルー半減期は、60min程度と
差はなかったものの、意匠的には、光の干渉による虹彩
現象や白濁層が認められた。Comparative Example 1 A photocatalytic tile was produced in the same manner as in Example 1, except that about 50 mg of the liquid was brush-coated on the surface of the above-mentioned glazed exterior tile.
As a result, although the methylene blue half-life was not different from about 60 min, an iris phenomenon and a cloudy layer due to light interference were recognized in design.
【0034】実施例2 実施例1の液に増粘剤としてPVA(ポリビニルアルコ
ール)を2g加えて混練してペースト状とし、これをス
クリーン印刷により上記内装タイルの表面に点状に印刷
した。印刷パターンの点の大きさ(直径)は20μmで
あり、点の数は1cm2当り12万個とした。このタイ
ルは、地肌の60%が露出している。Example 2 To the liquid of Example 1, 2 g of PVA (polyvinyl alcohol) as a thickener was added and kneaded to form a paste, which was printed in dot form on the surface of the interior tile by screen printing. The size (diameter) of the dots in the printed pattern was 20 μm, and the number of dots was 120,000 per cm 2 . This tile has 60% of its surface exposed.
【0035】その他は実施例1と同様にして光触媒タイ
ルを製造した。このタイルも、外観はTiO2を付着さ
せない施釉外装タイルと全く同一であった。Otherwise, a photocatalytic tile was manufactured in the same manner as in Example 1. This tile was also exactly the same in appearance as a glazed exterior tile to which no TiO 2 was attached.
【0036】なお、このタイルのメチレンブルー半減期
は40minであった。The methylene blue half-life of this tile was 40 minutes.
【0037】[0037]
【発明の効果】以上の実施例からも明らかな通り、本発
明によると、タイル本来の質感及び美感を有した意匠性
に優れた光触媒タイルが提供される。As is clear from the above embodiments, according to the present invention, a photocatalytic tile having the original texture and aesthetics and excellent design can be provided.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 相原 祐一郎 愛知県常滑市鯉江本町5丁目1番地 株式 会社イナックス内 (72)発明者 大貫 徹 愛知県常滑市鯉江本町5丁目1番地 株式 会社イナックス内 (72)発明者 神谷 嘉夫 愛知県常滑市鯉江本町5丁目1番地 株式 会社イナックス内 (72)発明者 大越 英雄 愛知県常滑市鯉江本町5丁目1番地 株式 会社イナックス内 Fターム(参考) 2K009 BB01 CC03 EE00 EE05 4F100 AA21A AD00B AR00A BA02 BA10A BA10B DC21A GB07 JL06 JL08A 4G069 AA11 BA48A BB04A BC50B EA11 FB23 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yuichiro Aihara 5-1-1 Koiehonmachi, Tokoname-shi, Aichi Prefecture Inax Corporation (72) Inventor Toru Onuki 5-1-1 Koiehonmachi, Tokoname-city, Aichi Prefecture Inax Corporation (72) Inventor Yoshio Kamiya 5-1-1 Koie Honcho, Tokoname-shi, Aichi Prefecture Inax Co., Ltd. (72) Inventor Hideo 5-1-1 Koie Honcho, Tokoname-shi, Aichi F-Term (Inax Co., Ltd.) 2K009 BB01 CC03 EE00 EE05 4F100 AA21A AD00B AR00A BA02 BA10A BA10B DC21A GB07 JL06 JL08A 4G069 AA11 BA48A BB04A BC50B EA11 FB23
Claims (4)
において、 該光触媒を線状及び/又は点状にタイル表面に設けたこ
とを特徴とする光触媒タイル。1. A photocatalytic tile having a photocatalyst provided on a surface thereof, wherein the photocatalyst is provided linearly and / or dotwise on the tile surface.
の40〜90%を露出させるように設けられていること
を特徴とする光触媒タイル。2. The photocatalytic tile according to claim 1, wherein the photocatalyst is provided so as to expose 40 to 90% of the tile surface.
部の光触媒が曲線状に設けられていることを特徴とする
光触媒タイル。3. The photocatalytic tile according to claim 1, wherein at least a part of the photocatalyst is provided in a curved shape.
部の光触媒が網目状に設けられていることを特徴とする
光触媒タイル。4. The photocatalytic tile according to claim 1, wherein at least a part of the photocatalyst is provided in a mesh pattern.
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JP07405699A JP4029516B2 (en) | 1999-03-18 | 1999-03-18 | Photocatalytic tile |
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JP07405699A JP4029516B2 (en) | 1999-03-18 | 1999-03-18 | Photocatalytic tile |
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Cited By (2)
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---|---|---|---|---|
WO2005068181A1 (en) * | 2004-01-16 | 2005-07-28 | Domo Oudenaarde Nv | Photocatalytic particles in floor laminates |
WO2006046443A1 (en) * | 2004-10-27 | 2006-05-04 | Suminoe Textile Co., Ltd. | Fiber fabric having voc removing function |
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JPH05253544A (en) * | 1992-03-13 | 1993-10-05 | Toto Ltd | Production of plate-shape member having deodorizing function |
JPH09225303A (en) * | 1995-12-21 | 1997-09-02 | Asahi Glass Co Ltd | Photocatalyst composition, its manufacture, and substrate with photocatalyst composition |
JPH09241038A (en) * | 1995-12-22 | 1997-09-16 | Toto Ltd | Photocatalytic hydrophilic member and its production |
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Cited By (3)
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WO2005068181A1 (en) * | 2004-01-16 | 2005-07-28 | Domo Oudenaarde Nv | Photocatalytic particles in floor laminates |
WO2006046443A1 (en) * | 2004-10-27 | 2006-05-04 | Suminoe Textile Co., Ltd. | Fiber fabric having voc removing function |
JPWO2006046443A1 (en) * | 2004-10-27 | 2008-08-07 | 住江織物株式会社 | Fiber cloth with VOC removal function |
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