JPH11128630A - Solar irradiation system air cleaning element and cleaning of air - Google Patents
Solar irradiation system air cleaning element and cleaning of airInfo
- Publication number
- JPH11128630A JPH11128630A JP9309388A JP30938897A JPH11128630A JP H11128630 A JPH11128630 A JP H11128630A JP 9309388 A JP9309388 A JP 9309388A JP 30938897 A JP30938897 A JP 30938897A JP H11128630 A JPH11128630 A JP H11128630A
- Authority
- JP
- Japan
- Prior art keywords
- air
- photocatalyst
- layer
- fine particles
- resin
- 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
- 238000004140 cleaning Methods 0.000 title claims abstract description 12
- 239000011941 photocatalyst Substances 0.000 claims abstract description 72
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 28
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 28
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 28
- 230000001877 deodorizing effect Effects 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000758 substrate Substances 0.000 claims abstract description 12
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 5
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000010457 zeolite Substances 0.000 claims abstract description 5
- 239000010419 fine particle Substances 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 15
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 230000001699 photocatalysis Effects 0.000 abstract description 16
- 239000002245 particle Substances 0.000 abstract description 13
- 239000000843 powder Substances 0.000 abstract description 12
- 238000004332 deodorization Methods 0.000 abstract description 4
- 239000011800 void material Substances 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 26
- 239000006185 dispersion Substances 0.000 description 14
- 235000019645 odor Nutrition 0.000 description 10
- 229920001577 copolymer Polymers 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 241000208125 Nicotiana Species 0.000 description 7
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 7
- 238000010304 firing Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 238000004887 air purification Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
- 229920002554 vinyl polymer Polymers 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は太陽光照射式の空気
清浄用エレメント及びその空気清浄用エレメントを使用
した空気の浄化方法に関し、特に、自動車の車内の脱臭
に有用なものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar irradiation type air purifying element and a method for purifying air using the air purifying element, and is particularly useful for deodorizing the interior of an automobile.
【０００２】[0002]
【従来の技術】酸化物半導体である酸化チタン等の光触
媒微粒子にバンドギャップ以上のエネルギ−を有する光
を照射すると、励起により電子及び正孔が発生され、表
面に近接した有機物や微生物が酸化により分解され、無
機酸化物においては、最終酸化物にまで酸化されるに至
る。そこで、この光触媒微粒子をバインダ−で担持させ
た光触媒体に室内空気を接触させ、空気中の臭気性成分
を分解して防臭乃至は空気浄化等を行うことが提案され
ている。この場合、光触媒微粒子を励起（活性化）させ
るための紫外線源として、太陽光を利用するケ−スとブ
ラックライト等の紫外線発生器を利用するケ−スとがあ
るが、太陽光に曝される室内の空気浄化には、太陽光を
利用することが便利である。2. Description of the Related Art When photocatalytic fine particles such as titanium oxide, which is an oxide semiconductor, are irradiated with light having an energy higher than the band gap, electrons and holes are generated by excitation, and organic substances and microorganisms close to the surface are oxidized. It is decomposed and, in the case of inorganic oxides, is oxidized to the final oxide. Therefore, it has been proposed that indoor air is brought into contact with a photocatalyst in which the photocatalyst fine particles are carried by a binder to decompose odorous components in the air to perform deodorization or air purification. In this case, as a UV light source for exciting (activating) the photocatalyst fine particles, there are a case using sunlight and a case using an ultraviolet ray generator such as a black light. It is convenient to use sunlight to purify indoor air.
【０００３】上記光触媒微粒子を支持体に担持させるに
は、通常、光触媒微粒子をバインダ−を介して支持体に
固着する方法が用いられており、このバインダ−には、
活性化された光触媒微粒子で分解劣化されることのない
安定性が要求される。そこで、多くの先行技術が提示さ
れており、例えば、バインダ−として、シリコ−ン系ポ
リマ−やビニルエ−テル−フルオロオレフィンコポリマ
−やビニルエステル−フルオロオレフィンコポリマ−等
のフッ素系ポリマ−を使用することが提案されている
（特開平７−１７１４０８号）。また、上記の空気浄化
が光触媒体表面での接触反応によるためにその接触面積
を可及的に広くすることが要求され、例えば、シ−ト状
の光触媒体を間隙を隔てて積層したり、筒状の光触媒体
を集束し、その間隙を空気通路とすることが提案されて
いる（特開平７−２５１０２８号）。In order to support the photocatalyst fine particles on a support, a method of fixing the photocatalyst fine particles to the support via a binder is generally used.
Activated photocatalyst fine particles are required to be stable without being decomposed and degraded. Therefore, many prior arts have been proposed. For example, a fluorine-based polymer such as a silicone-based polymer, a vinyl ether-fluoroolefin copolymer, or a vinyl ester-fluoroolefin copolymer is used as a binder. (Japanese Patent Laid-Open No. 7-171408). Further, since the above-mentioned air purification is caused by a contact reaction on the surface of the photocatalyst, the contact area is required to be as large as possible. For example, sheet-like photocatalysts are laminated with a gap therebetween, It has been proposed to condense a cylindrical photocatalyst and use the gap as an air passage (JP-A-7-251028).
【０００４】[0004]
【発明が解決しようとする課題】自動車においては、新
車の場合、内装材からの揮発性ガスに起因する、所謂新
車臭が嫌われ、また、使用中の車の場合、内装材やエア
コン内部等に吸着した煙草臭が問題とされている。従
来、自動車の室内の脱臭には、活性炭、ゼオライト、シ
リカゲル、アルミナ等の吸着剤を主成分とする脱臭材が
用いられているが、脱臭材の寿命が短く、相当に頻繁な
取替えが必要とされ厄介である。そこで、上記の光触媒
体によって煙草臭を脱臭することが提案されているが
（特開平７−２５１０２８号）、従来の光触媒体では、
単位体積当りの空気接触面積が小さく、上記したよう
に、シ−ト状の光触媒体を間隙を隔てて積層したり、筒
状の光触媒体を集束し、その間隙を空気通路とすること
が必要であり、かかる間隙構造では、その間隙に空気を
流通させるためにフアン等が必要とされ、設備費のコス
トアップが避けられない。In the case of a new car, a so-called new car smell caused by volatile gas from interior materials is disliked in the case of a new car. There is a problem with the tobacco odor adsorbed on the surface. Conventionally, deodorizing materials mainly composed of adsorbents such as activated carbon, zeolite, silica gel, and alumina have been used for deodorizing the interior of automobiles.However, the deodorizing material has a short life and requires frequent replacement. It is troublesome. Therefore, it has been proposed to deodorize tobacco odor using the above-mentioned photocatalyst (Japanese Patent Laid-Open No. Hei 7-251028).
Since the air contact area per unit volume is small, as described above, it is necessary to stack sheet-shaped photocatalysts with a gap or to condense a cylindrical photocatalyst and use the gap as an air passage. In such a gap structure, a fan or the like is required to allow air to flow through the gap, and an increase in equipment costs is inevitable.
【０００５】また、光触媒体の活性化に太陽光を利用す
る場合、光触媒体の配設が窓の近傍に制限され、従って
設置スペ−スが必然的に限定される。例えば、自動車の
場合、フロントガラスとバックミラ−との間やリヤウィ
ンドウ近傍で、かつ視界を実質上妨げないスペ−スに限
られ、利用できるスペ−スはたかだか２００ｍｍ×２０
０ｍｍ程度の垂直平面積の範囲内である。しかしなが
ら、従来の光触媒体では、かかる限られたスペ−スで太
陽光の照射下、車内を満足に脱臭することは困難であ
る。When sunlight is used for activating the photocatalyst, the arrangement of the photocatalyst is limited to the vicinity of the window, so that the installation space is necessarily limited. For example, in the case of an automobile, the space between the windshield and the back mirror or in the vicinity of the rear window is substantially limited to a space that does not substantially obstruct the field of view.
It is within the range of a vertical plane area of about 0 mm. However, with the conventional photocatalyst, it is difficult to satisfactorily deodorize the interior of the vehicle under the sunlight with such limited space.
【０００６】そこで、本発明者は、自動車内の脱臭を、
太陽光利用のもとで光触媒体により行うことを可能にす
るべく、鋭意検討した結果、ポリテトラフルオロエチレ
ン粉末と光触媒微粒子とのディスパ−ジョンを塗布し、
この塗布層を焼成して得た光触媒層が著しく優れた脱臭
性能を呈し、前記の小さな設置スペ−スでも車内を効果
的に脱臭できることを知った。この高い脱臭性能の原因
を解明するために、その光触媒層の組織を顕微鏡で観察
したところ、光触媒微粒子と樹脂との間に空気層が存在
し、この空気層が繋がって連通路を形成していることを
知った。この光触媒層において、光触媒微粒子とポリテ
トラフルオロエチレン樹脂との界面に空隙が形成される
理由は、ポリテトラフルオロエチレンと光触媒酸化チタ
ン微粒子との熱収縮率の著しい差とポリテトラフルオロ
エチレンの非接着性にあり、焼成加熱の冷却時、その界
面に大なる熱収縮応力が発生し、界面の非接着性のため
にその大なる引張り応力で界面剥離が生じることによる
と推定される。Accordingly, the present inventor has proposed a method for deodorizing an automobile.
As a result of intensive studies to enable the use of photocatalysts under the use of sunlight, a dispersion of polytetrafluoroethylene powder and photocatalyst fine particles was applied,
It has been found that the photocatalyst layer obtained by baking this coating layer exhibits remarkably excellent deodorizing performance, and that the inside of the vehicle can be effectively deodorized even with the above small installation space. To elucidate the cause of this high deodorizing performance, the structure of the photocatalyst layer was observed with a microscope, and an air layer was present between the photocatalyst fine particles and the resin, and this air layer was connected to form a communication passage. I knew that In this photocatalyst layer, the voids are formed at the interface between the photocatalyst fine particles and the polytetrafluoroethylene resin because of the remarkable difference in the heat shrinkage between polytetrafluoroethylene and the photocatalytic titanium oxide fine particles and the non-adhesion of polytetrafluoroethylene. It is presumed that a large heat shrinkage stress is generated at the interface at the time of cooling by baking heating, and the interface is separated due to the large tensile stress due to the non-adhesiveness of the interface.
【０００７】従来、光触媒体の製造方法として、ビニル
エ−テル−フルオロオレフィンコポリマ−やビニルエス
テル−フルオロオレフィンコポリマ−等のフッ素系ポリ
マ−とイソシアネ−ト系硬化剤等の架橋剤と光触媒微粒
子との溶剤溶液を支持体上に塗布し、この塗布層を架橋
反応で硬化させること（特開平７−１７１４０８号）や
ポリテトラフルオロエチレン粒子と二酸化チタンと活性
炭との混合物をシ−ト状に圧延すること（特開平６−３
１５６号）が公知であるが、これらでは光触媒微粒子と
樹脂との界面に収縮応力を発生させるような過程がな
く、その界面での空隙発生が到底期待できない。Conventionally, a method for producing a photocatalyst is to prepare a photocatalyst fine particle comprising a fluorine-based polymer such as vinyl ether-fluoroolefin copolymer or vinyl ester-fluoroolefin copolymer, a crosslinking agent such as an isocyanate-based curing agent, and the like. A solvent solution is applied on a support, and the applied layer is cured by a crosslinking reaction (Japanese Patent Laid-Open No. 171408/1995), or a mixture of polytetrafluoroethylene particles, titanium dioxide and activated carbon is rolled into a sheet. (Japanese Unexamined Patent Publication No. 6-3)
No. 156) is known, but in these, there is no process of generating a contraction stress at the interface between the photocatalyst fine particles and the resin, and it is hardly expected to generate voids at the interface.
【０００８】本発明の目的は、上記検討結果の知見に基
づき、自動車の室内を光触媒体で太陽光を利用し、運転
者等の視界に支障を来すことなく満足に脱臭できるよう
にする太陽光照射式空気清浄用エレメント及び空気の浄
化方法を提供することにある。[0008] An object of the present invention is to provide a solar cell capable of satisfactorily deodorizing the interior of an automobile using a photocatalyst based on the findings of the above-mentioned examinations without disturbing the visibility of a driver or the like. An object of the present invention is to provide a light irradiation type air cleaning element and an air purification method.
【０００９】[0009]
【課題を解決するための手段】本発明に係る太陽光照射
式空気清浄用エレメントは、ポリテトラフルオロエチレ
ン樹脂の焼成層に光触媒微粒子が分散され、樹脂と光触
媒微粒子との間に微小空隙が形成され、空隙率が７％以
上とされた光触媒層を支持基材上に有することを特徴と
する構成であり、活性炭、ゼオライト、または銅カルボ
キシルメチルセルロ−スの一種または二種以上を主成分
とする脱臭シ−トを積層することができる。本発明に係
る空気の浄化方法は、これらの太陽光照射式空気清浄用
エレメントを室内に配設し、太陽光を照射することを特
徴とする構成である。According to the present invention, there is provided an air cleaning element for irradiating sunlight, wherein fine particles of photocatalyst are dispersed in a fired layer of polytetrafluoroethylene resin, and minute voids are formed between the resin and the fine particles of photocatalyst. And a photocatalyst layer having a porosity of 7% or more on a support substrate, wherein one or more of activated carbon, zeolite, or copper carboxymethyl cellulose is used as a main component. Deodorizing sheets can be laminated. The air purification method according to the present invention has a configuration in which these sunlight-irradiating air purifying elements are arranged in a room and are irradiated with sunlight.
【００１０】[0010]
【発明の実施の形態】以下、図面を参照しつつ本発明の
実施の形態について説明する。図１は本発明に係る空気
清浄用エレメントＡの断面図を示している。図１におい
て、１は支持基材である。２は支持基材１上に設けた光
触媒層であり、焼結されたポリテトラフルオロエチレン
粉末の焼成層内に光触媒微粒子が分散され、樹脂と光触
媒微粒子との間に微小空隙が形成され、焼結されたポリ
テトラフルオロエチレン粉末間の間隙が上記空気層に繋
がって多間隙連通組織となっている。上記ポリテトラフ
ルオロエチレン樹脂と光触媒微粒子との間の空隙の厚み
は、数ナノメ−タ〜数ミクロンの微細間隙であり、ポリ
テトラフルオロエチレンの疎水性のために、水等の通過
は生じないが、空気は充分に流出入され得る。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an air cleaning element A according to the present invention. In FIG. 1, 1 is a supporting substrate. Reference numeral 2 denotes a photocatalyst layer provided on the support substrate 1. Photocatalyst fine particles are dispersed in a sintered layer of sintered polytetrafluoroethylene powder, and fine voids are formed between the resin and the photocatalyst fine particles. The gaps between the tied polytetrafluoroethylene powders are connected to the air layer to form a multi-gap communication structure. The thickness of the gap between the polytetrafluoroethylene resin and the photocatalyst fine particles is a fine gap of several nanometers to several microns, and water or the like does not pass due to the hydrophobicity of polytetrafluoroethylene. The air can flow in and out well.
【００１１】本発明に係る空気清浄用エレメントを製造
するには、ポリテトラフルオロエチレン粉末と光触媒微
粒子とを含有したディスパ−ジョンを支持基材に塗布
し、加熱により塗布層中の溶媒を蒸発除去し、更に加熱
焼成（加熱温度は３３０℃以上）によりポリテトラフル
オロエチレン粒子間を焼結する。この焼結後の冷却時、
ポリテトラフルオロエチレン樹脂の光触媒微粒子よりも
大なる熱収縮及びポリテトラフルオロエチレン樹脂の光
触媒微粒子に対する非融着性のために、光触媒微粒子と
ポリテトラフルオロエチレン樹脂との間に空気層が形成
される。また、焼成時でのポリテトラフルオロエチレン
粉末の溶融粘度が高く（１０8ポアズ以上）流動せずに
粒形状が保持され、かつ焼成が無加圧で行われるから、
焼結されたポリテトラフルオロエチレン粉末間に間隙が
充分に残存される。従って、光触媒層は通気性の多間隙
組織となる。上記ポリテトラフルオロエチレン粉末の粒
径は、０．１〜１μｍ、光触媒微粒子の粒径は２００ｎ
ｍ以下、好ましくは５０ｎｍ以下である。上記光触媒層
の空隙率は７％以上、好ましくは１０％以上とされる。
この空隙率ｘは、光触媒層の真比重をρ、光触媒層の体
積ｖの重量をｗとすれば、 ｘ＝１−〔ｗ／（ｖρ）〕 で与えられる。空隙率７％未満では、多間隙組織による
空気と光触媒微粒子との接触度向上効果が低く、後述の
比較例からも明らかなように自動車の室内の脱臭を満足
に行い難い。ただし、機械的強度上３０％以下とするこ
とが好ましい。また、光触媒層の厚さは３μｍ〜３０μ
ｍとすることが好ましい。３μｍ未満では、光触媒層の
体積が少なく脱臭性能が低くなり、３０μｍを越えると
ガス拡散効率が低下し必要以上に厚い層厚になってしま
う。上記ディスパ−ジョンの光触媒微粒子配合量が多す
ぎると、ポリテトラフルオロエチレンによる光触媒微粒
子間の結着強度が不充分となるので、光触媒微粒子の含
有率は５〜６０％とすることが好ましい。In order to manufacture the air purifying element according to the present invention, a dispersion containing polytetrafluoroethylene powder and photocatalyst fine particles is applied to a supporting substrate, and the solvent in the coating layer is removed by heating by heating. Then, the polytetrafluoroethylene particles are sintered by heating and firing (heating temperature is 330 ° C. or higher). During cooling after this sintering,
An air layer is formed between the photocatalyst fine particles and the polytetrafluoroethylene resin due to the heat shrinkage larger than the photocatalytic fine particles of the polytetrafluoroethylene resin and the non-fusion property of the polytetrafluoroethylene resin to the photocatalytic fine particles. . In addition, the melt viscosity of the polytetrafluoroethylene powder during firing is high (10 8 poise or more), the particle shape is maintained without flowing, and firing is performed without pressure.
Enough gaps remain between the sintered polytetrafluoroethylene powders. Therefore, the photocatalyst layer has an air-permeable multi-gap structure. The particle size of the polytetrafluoroethylene powder is 0.1 to 1 μm, and the particle size of the photocatalyst fine particles is 200 n.
m, preferably 50 nm or less. The porosity of the photocatalyst layer is at least 7%, preferably at least 10%.
The porosity x is given by x = 1− [w / (vρ)], where ρ is the true specific gravity of the photocatalytic layer and w is the weight of the volume v of the photocatalytic layer. When the porosity is less than 7%, the effect of improving the degree of contact between the air and the photocatalyst fine particles by the multi-porous structure is low, and it is difficult to satisfactorily deodorize the interior of the automobile, as is apparent from the comparative examples described later. However, it is preferable to be 30% or less in terms of mechanical strength. The thickness of the photocatalyst layer is 3 μm to 30 μm.
m is preferable. If it is less than 3 μm, the volume of the photocatalyst layer will be small and the deodorizing performance will be low. If it exceeds 30 μm, the gas diffusion efficiency will be reduced and the layer thickness will be unnecessarily thick. If the content of the photocatalyst fine particles in the dispersion is too large, the binding strength between the photocatalyst fine particles by polytetrafluoroethylene becomes insufficient. Therefore, the content of the photocatalyst fine particles is preferably 5 to 60%.
【００１２】上記光触媒微粒子には、優れた光触媒活性
を呈するアナタ−ゼ型酸化チタン微粒子を使用すること
が好ましい。また、光触媒微粒子の活性を高めるため
に、アルカリ金属イオンを担持させることができる。上
記支持基材には、焼成時の加熱によっても変形等を生じ
ない耐熱性を有するものが使用され、例えば、アルミニ
ウム，ステンレス等の金属箔やセラミックス板，ガラス
板等の無機質板、ポリイミド，ポリテトラフルオロエチ
レン等の耐熱性プラスチックフィルムやポリテトラフル
オロエチレン等の耐熱性プラスチックを含浸したガラス
繊維やポリアミド繊維の織物やガラス繊維，セラミック
ス繊維，金属繊維，炭素繊維の単独または混合物のフエ
ルト状物やガラス繊維，セラミックス繊維，金属繊維，
炭素繊維の単独または混合物の網状物等を使用できる。
上記支持基材へのディスパ−ジョンの塗布には、ロ−ル
コ−タで塗布する方法、支持基材をディスパ−ジョン中
に浸漬して引き上げる方法、ディスパ−ジョンをスプレ
−する方法、ディスパ−ジョンを刷毛塗する方法、ディ
スパ−ジョンを流延する方法等を使用できる。上記ディ
スパ−ジョンの濃度は、塗布方法に応じて設定される
が、通常４０％〜６０％とされる。ディスパ−ジョンに
は、焼成層の空隙率をアップするための添加剤、強度を
向上するための添加剤、更に焼成温度に耐え得るガス吸
着剤を適宜添加することも可能である。It is preferable to use an anatase type titanium oxide fine particle exhibiting excellent photocatalytic activity as the photocatalytic fine particles. Further, in order to enhance the activity of the photocatalyst fine particles, an alkali metal ion can be supported. As the supporting substrate, a substrate having heat resistance that does not cause deformation or the like even by heating during firing is used, for example, metal foils such as aluminum and stainless steel, inorganic plates such as ceramic plates and glass plates, polyimide, and polystyrene. A woven or glass fiber or polyamide fiber impregnated with a heat-resistant plastic film such as tetrafluoroethylene or a heat-resistant plastic such as polytetrafluoroethylene, or a felt-like material such as glass fiber, ceramic fiber, metal fiber, or carbon fiber alone or as a mixture. Glass fiber, ceramic fiber, metal fiber,
A network of carbon fibers alone or as a mixture can be used.
To apply the dispersion to the support substrate, a method of applying a roll coater, a method of dipping the support substrate in the dispersion and pulling it up, a method of spraying the dispersion, and a method of dispersing the dispersion can be used. A method of brush-coating John, a method of casting dispersion, and the like can be used. The concentration of the dispersion is set according to the coating method, and is usually 40% to 60%. An additive for increasing the porosity of the fired layer, an additive for improving the strength, and a gas adsorbent that can withstand the firing temperature can be appropriately added to the dispersion.
【００１３】本発明に係る空気清浄用エレメントにおい
ては、光触媒微粒子と樹脂バインダ−との間に空隙が存
在し、この空隙を通じて空気が拡散流通するから、空気
が光触媒微粒子の外表面にほぼ全面で接触して通過し、
空気中の脱臭性成分が活性化光触媒微粒子で効率よく酸
化脱臭される。また、光触媒微粒子を担持しているポリ
テトラフルオロエチレンが難分解性であるから、樹脂バ
インダ−を崩壊無く長期にわたり安定に保持でき、か
つ、光触媒微粒子を樹脂層の空隙を介して包み込んであ
るから、光触媒微粒子を長期にわたり安定に担持でき
る。従って、空気中の脱臭性成分を長期にわたり効率よ
く酸化脱臭できる。本発明に係る空気清浄用エレメント
は、矩形、楕円形等の平板形状でその両端にフック等の
留め具を取付けて使用でき、表面積を大きくするため
に、図２に示すようにブリ−ツ加工やハニカム加工して
使用することもできる。図２において、３はフックを示
している。また、活性炭、ゼオライト、または銅カルボ
キシルメチルセルロ−スの一種または二種以上を主成分
とする脱臭シ−トと積層して使用することもできる。In the air purifying element according to the present invention, a void exists between the photocatalyst fine particles and the resin binder, and the air diffuses and flows through the voids. Touch and pass,
The deodorizing components in the air are efficiently oxidized and deodorized by the activated photocatalyst fine particles. Further, since the polytetrafluoroethylene carrying the photocatalyst fine particles is hardly decomposable, the resin binder can be stably retained for a long time without collapse, and the photocatalyst fine particles are wrapped through the voids of the resin layer. In addition, photocatalyst fine particles can be stably supported over a long period of time. Therefore, the deodorizing components in the air can be efficiently oxidized and deodorized over a long period of time. The air purifying element according to the present invention has a flat plate shape such as a rectangular shape or an elliptical shape, and can be used by attaching fasteners such as hooks at both ends thereof. Or it can be used after being processed by honeycomb. In FIG. 2, reference numeral 3 denotes a hook. Further, it can be used by laminating it with a deodorizing sheet containing one or more of activated carbon, zeolite and copper carboxylmethyl cellulose.
【００１４】本発明に係る空気清浄用エレメントは自動
車の室内の脱臭（新車臭の脱臭、煙草臭の脱臭）に好適
に使用でき、図３に示すように、空気清浄用エレメント
Ａを自動車のフロントガラス４１とバックミラ−４２と
の間に運転手の視界を実質上妨げない寸法で配設した
り、または、リヤウィンドウ４３の近傍に乗客の視界を
実質上妨げない寸法で配設し、太陽光線の照射で空気清
浄用エレメントＡの光触媒層を活性化して室内を脱臭す
ることができる。The air purifying element according to the present invention can be suitably used for deodorizing the interior of a vehicle (deodorizing new vehicle odors and deodorizing tobacco odors). As shown in FIG. It is arranged between the glass 41 and the back mirror 42 in a size that does not substantially obstruct the driver's view, or is arranged near the rear window 43 in a size that does not substantially obstruct the view of the passenger. Irradiates the photocatalyst layer of the air cleaning element A to irradiate the air to deodorize the room.
【００１５】[0015]
〔実施例１〕ディスパ−ジョンには光触媒酸化チタン微
粒子（粒径７ｎｍ，比重３．８４）の含有量４０重量％
のポリテトラフルオロエチレン粉末（粒径０．３μｍ，
比重２．２０）の水分散液を使用し、支持基材には厚み
６０μｍのアルミニウム箔を使用した。このアルミニウ
ム箔をディスパ−ジョンに浸漬し、引上げて１００℃で
乾燥したうえで３９０℃×２分で焼成して、光触媒層の
空隙率が１２．２％，厚さが７μｍのシ−ト状光触媒体
を得た。このシ−ト状光触媒体を１０ｃｍ×１００ｃｍ
に裁断し、１０ｃｍ×１０ｃｍの外郭寸法のブリ−ツに
加工し、両端にフックを取付て空気清浄用エレメントと
した。この空気清浄用エレメントを新車の乗用車（２０
００ｃｃクラスのセダン型）のフロントガラスとバック
ミラ−との間に配設し日光が当る屋外に駐車して脱臭を
行った。空気清浄用エレメントを配設した後、５時間で
新車臭が消臭した。３日目に空気清浄用エレメントを外
したところ、一昼夜経過で再び新車臭が感知されたた
め、再度空気清浄用エレメントを配設したところ、再配
設後５時間で新車臭が消え、以後新車臭は感知されなか
った。Example 1 The content of the photocatalyst titanium oxide fine particles (particle diameter 7 nm, specific gravity 3.84) was 40% by weight in the dispersion.
Polytetrafluoroethylene powder (particle diameter 0.3 μm,
An aqueous dispersion having a specific gravity of 2.20) was used, and an aluminum foil having a thickness of 60 μm was used as a supporting substrate. This aluminum foil is immersed in a dispersion, pulled up, dried at 100 ° C., and fired at 390 ° C. × 2 minutes to form a sheet having a photocatalytic layer having a porosity of 12.2% and a thickness of 7 μm. A photocatalyst was obtained. This sheet-shaped photocatalyst is 10 cm × 100 cm.
And processed into a bridge having an outer dimension of 10 cm × 10 cm, and hooks were attached to both ends to form an air purifying element. This air purifying element is connected to a new passenger car (20
(00 cc class sedan type) It was arranged between the windshield and the back mirror, parked outdoors in sunlight, and deodorized. Five hours after the air cleaning element was installed, the smell of new cars was eliminated. When the air purifying element was removed on the third day, the smell of the new car was detected again after one day and night. Therefore, when the air purifying element was installed again, the smell of the new car disappeared 5 hours after the rearrangement, and the new car smell thereafter. Was not detected.
【００１６】〔実施例２〕支持基材に厚さ０．６ｍｍ，
坪量３０ｇ／ｍ2の炭素繊維フェルトを使用した以外、
実施例１と同様にしてシ−ト状光触媒体を得、このシ−
ト状光触媒体に、銅カルボキシメチルセルロ−スを主成
分とする脱臭シ−ト（興人社製クリ−ンスカイ）を積層
し、これを１０ｃｍ×１００ｃｍに裁断し、１０ｃｍ×
１０ｃｍの外郭寸法のブリ−ツに加工し、両端にフック
を取付て空気清浄用エレメントとした。この空気清浄用
エレメントを、煙草臭が車の内装材やエアコン内部等に
吸着している乗用車（２０００ｃｃクラスのセダン型）
のフロントガラスとバックミラ−との間に配設し日光が
当る屋外に駐車して脱臭を行った。空気清浄用エレメン
トを配設した後、６時間経過以降は煙草臭が消え、以後
煙草臭の吸着物からの脱離による恒久的な臭いは完全に
消臭した。Example 2 A supporting base material having a thickness of 0.6 mm
Other than using a carbon fiber felt having a basis weight of 30 g / m 2 ,
A sheet-like photocatalyst was obtained in the same manner as in Example 1.
A deodorizing sheet (Clean Sky, manufactured by Kojin Co., Ltd.) containing copper carboxymethyl cellulose as a main component is laminated on the photocatalyst, and cut into 10 cm × 100 cm.
The air-purifying element was processed into a beam having an outer dimension of 10 cm, and hooks were attached to both ends. Passenger car (2000cc class sedan type) with this air purifying element whose tobacco odor is adsorbed in car interior materials and air conditioner interior.
Was placed between the windshield and the back mirror, and parked outdoors in sunlight to deodorize. After arranging the air purifying element, the tobacco odor disappeared after 6 hours, and the permanent odor due to the desorption of the tobacco odor from the adsorbed material was completely eliminated thereafter.
【００１７】〔比較例１〕実施例１に対し、光触媒層の
空隙率が３．１％，厚さが７μｍのシ−ト状光触媒体を
得、他は実施例１と同様にして空気清浄用エレメントを
製作した。実施例１と同様にして新車臭の脱臭を試みた
ところ、満足できる脱臭は行えなかった。 〔比較例２〕実施例１に対し、水ディスパ−ジョン中の
ポリテトラフルオロエチレンを溶融粘度が１０4ポアズ
のパ−フルオロアルキルビニルエ−テル−テトラフルオ
ロエチレン共重合体に置換した以外、実施例１と同じと
した。光触媒層の気孔率は１％であった。実施例１と同
様にして新車臭の脱臭を試みたところ、満足できる脱臭
は行えなかった。Comparative Example 1 A sheet-like photocatalyst having a porosity of the photocatalyst layer of 3.1% and a thickness of 7 μm was obtained in comparison with Example 1, and the other steps were the same as in Example 1. The element for use was produced. When an attempt was made to deodorize the smell of a new vehicle in the same manner as in Example 1, satisfactory deodorization was not performed. Comparative Example 2 The same procedure as in Example 1 was carried out except that polytetrafluoroethylene in the water dispersion was replaced with a perfluoroalkylvinyl ether-tetrafluoroethylene copolymer having a melt viscosity of 10 4 poise. Same as Example 1. The porosity of the photocatalyst layer was 1%. When an attempt was made to deodorize the smell of a new vehicle in the same manner as in Example 1, satisfactory deodorization was not performed.
【００１８】このように比較例２が実施例１に較べ脱臭
性能に劣るのは、パ−フルオロアルキルビニルエ−テル
−テトラフルオロエチレン共重合体が光触媒微粒子によ
く加熱融着し、光触媒微粒子の表面の大部分がパ−フル
オロアルキルビニルエ−テル−テトラフルオロエチレン
共重合体で覆われること、パ−フルオロアルキルビニル
エ−テル−テトラフルオロエチレン共重合体の溶融粘度
が低く焼成時に粉末形態を保持し難く、焼結粉末間に間
隙が残存し難いこと等によると推定される。Thus, Comparative Example 2 was inferior in deodorizing performance as compared with Example 1 because the perfluoroalkylvinyl ether-tetrafluoroethylene copolymer was well heated and fused to the photocatalyst fine particles, and the Most of the surface is covered with a perfluoroalkylvinyl ether-tetrafluoroethylene copolymer, and the melt viscosity of the perfluoroalkylvinyl ether-tetrafluoroethylene copolymer is low and the powder form is reduced during firing. It is presumed to be due to the fact that it is difficult to hold and that the gaps between the sintered powders hardly remain.
【００１９】[0019]
【発明の効果】本発明に係る空気清浄用エレメントにお
いては、光触媒微粒子とバインダ−樹脂との間に微細空
隙が存在し、その空隙を経て外部の空気が光触媒微粒子
のほぼ全面に接触して流通するから、その空気中脱臭成
分に対する活性光触媒微粒子の酸化脱臭効率を向上でき
る。また、光触媒微粒子が樹脂バインダ−内に抱き込ま
れ、かつ樹脂自体が難分解性であるから、光触媒微粒子
を安定に担持できる。従って、比較的に小さな外郭寸法
にて長期にわたり脱臭でき、自動車のフロントガラスと
バックミラ−との間やリヤウィンドウの近傍に実質上視
界を阻害することなく配設し太陽光線照射による光触媒
粒子の活性化で新車臭や煙草臭を満足に脱臭できる。In the air purifying element according to the present invention, a fine gap exists between the photocatalyst fine particles and the binder resin, and external air comes into contact with almost the entire surface of the photocatalytic fine particles via the gap. Therefore, the oxidative deodorizing efficiency of the active photocatalyst fine particles against the deodorizing component in the air can be improved. Further, since the photocatalyst fine particles are held in the resin binder and the resin itself is hardly decomposable, the photocatalyst fine particles can be stably supported. Therefore, it can be deodorized for a long period of time with a relatively small outer dimension, and is disposed between the windshield and the back mirror of the vehicle or near the rear window without substantially obstructing the field of view, and the activity of the photocatalytic particles by the irradiation of sunlight is increased. It can satisfactorily deodorize new car odors and tobacco odors.
【図１】本発明に係る太陽光照射式空気清浄用エレメン
トの断面図である。FIG. 1 is a sectional view of a solar irradiation type air cleaning element according to the present invention.
【図２】本発明に係る太陽光照射式空気清浄用エレメン
トの一例を示す図面である。FIG. 2 is a view showing an example of a solar irradiation type air cleaning element according to the present invention.
【図３】本発明に係る太陽光照射式空気清浄用エレメン
トの使用状態を示す図面である。FIG. 3 is a view showing a use state of a solar irradiation type air cleaning element according to the present invention.
１ 支持基材 ２ 光触媒層 Ａ 太陽光照射式空気清浄用エレメン
トDESCRIPTION OF SYMBOLS 1 Support base material 2 Photocatalyst layer A Solar irradiation type air purifying element
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ // Ｂ０１Ｊ 35/02 Ｂ０１Ｊ 35/02 Ｊ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI // B01J 35/02 B01J 35/02 J
Claims (5)
に光触媒微粒子が分散され、樹脂と光触媒微粒子との間
に微小空隙が形成され、空隙率が７％以上とされた光触
媒層を支持基材上に有することを特徴とする太陽光照射
式空気清浄用エレメント。1. A photocatalyst layer having a porosity of 7% or more is formed on a supporting substrate by dispersing photocatalyst fine particles in a fired layer of polytetrafluoroethylene resin, forming minute voids between the resin and the photocatalyst fine particles. A solar irradiation type air purifying element characterized by having the above.
ルメチルセルロ−スの一種または二種以上を主成分とす
る脱臭シ−トが積層されている請求項１記載の太陽光照
射式空気清浄用エレメント。2. A solar irradiation type air cleaning element according to claim 1, wherein a deodorizing sheet containing one or more of activated carbon, zeolite and copper carboxylmethyl cellulose as main components is laminated.
レメントを室内に配設し、太陽光を照射することを特徴
とする空気の浄化方法。3. A method for purifying air, comprising: arranging the element for purifying sunlight-type air purifying air according to claim 1 in a room and irradiating the element with sunlight.
レメントに代え、請求項２記載の太陽光照射式空気清浄
用エレメントを室内に配設し、太陽光を照射することを
特徴とする空気の浄化方法。4. A solar light irradiating air purifying element according to claim 2 is provided in a room instead of the solar light irradiating air purifying element according to claim 1, and the solar light is irradiated. How to purify air.
４記載の空気の浄化方法。5. The method for purifying air according to claim 3, wherein the room is inside a car.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30938897A JP3963541B2 (en) | 1997-10-23 | 1997-10-23 | Solar irradiation type air cleaning sheet and air purification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30938897A JP3963541B2 (en) | 1997-10-23 | 1997-10-23 | Solar irradiation type air cleaning sheet and air purification method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11128630A true JPH11128630A (en) | 1999-05-18 |
| JP3963541B2 JP3963541B2 (en) | 2007-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30938897A Expired - Lifetime JP3963541B2 (en) | 1997-10-23 | 1997-10-23 | Solar irradiation type air cleaning sheet and air purification method |
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| Country | Link |
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| JP (1) | JP3963541B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11300150A (en) * | 1998-04-22 | 1999-11-02 | Aqueous Reserch:Kk | Filter for cleaning air and air purifier using the same |
| JP2002011312A (en) * | 2000-06-29 | 2002-01-15 | Nitto Denko Corp | Incinerator exhaust gas treatment filter and its production method |
| US6884399B2 (en) | 2001-07-30 | 2005-04-26 | Carrier Corporation | Modular photocatalytic air purifier |
| JP2008126121A (en) * | 2006-11-20 | 2008-06-05 | Nissan Motor Co Ltd | Photocatalyst system for automobile |
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| JPH01189322A (en) * | 1988-01-22 | 1989-07-28 | Hitachi Ltd | Deodorizing device |
| JPH05309267A (en) * | 1992-05-11 | 1993-11-22 | Japan Storage Battery Co Ltd | Photocatalyst body |
| JPH0724256A (en) * | 1993-06-24 | 1995-01-27 | Nippondenso Co Ltd | Deodorant |
| JPH07171408A (en) * | 1993-06-28 | 1995-07-11 | Ishihara Sangyo Kaisha Ltd | Photocatalytic body and its production |
| JPH07251028A (en) * | 1994-03-15 | 1995-10-03 | Mitsubishi Electric Corp | Apparatus for deodorizing tobacco smell |
| JPH08150197A (en) * | 1994-09-29 | 1996-06-11 | Toto Ltd | Member equipped with deodorizing function |
| JPH08252305A (en) * | 1995-03-16 | 1996-10-01 | Aiwa:Kk | Air purifying sheet and its manufacture |
| JPH09119893A (en) * | 1995-10-24 | 1997-05-06 | Nippon Paint Co Ltd | Method for accelerated weathering test of fluororesin-based paint |
| JPH09249871A (en) * | 1996-03-14 | 1997-09-22 | Toli Corp Ltd | Stainproofing and deodorizing structure and interior material utilizing the same structure |
| JPH09256217A (en) * | 1996-03-25 | 1997-09-30 | Nitto Denko Corp | Polytetrafluoroethylene fiber and its production |
| WO1998026115A1 (en) * | 1996-12-13 | 1998-06-18 | Daikin Industries, Ltd. | Fibrous materials of fluororesins and deodorant and antibacterial fabrics made by using the same |
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- 1997-10-23 JP JP30938897A patent/JP3963541B2/en not_active Expired - Lifetime
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01189322A (en) * | 1988-01-22 | 1989-07-28 | Hitachi Ltd | Deodorizing device |
| JPH05309267A (en) * | 1992-05-11 | 1993-11-22 | Japan Storage Battery Co Ltd | Photocatalyst body |
| JPH0724256A (en) * | 1993-06-24 | 1995-01-27 | Nippondenso Co Ltd | Deodorant |
| JPH07171408A (en) * | 1993-06-28 | 1995-07-11 | Ishihara Sangyo Kaisha Ltd | Photocatalytic body and its production |
| JPH07251028A (en) * | 1994-03-15 | 1995-10-03 | Mitsubishi Electric Corp | Apparatus for deodorizing tobacco smell |
| JPH08150197A (en) * | 1994-09-29 | 1996-06-11 | Toto Ltd | Member equipped with deodorizing function |
| JPH08252305A (en) * | 1995-03-16 | 1996-10-01 | Aiwa:Kk | Air purifying sheet and its manufacture |
| JPH09119893A (en) * | 1995-10-24 | 1997-05-06 | Nippon Paint Co Ltd | Method for accelerated weathering test of fluororesin-based paint |
| JPH09249871A (en) * | 1996-03-14 | 1997-09-22 | Toli Corp Ltd | Stainproofing and deodorizing structure and interior material utilizing the same structure |
| JPH09256217A (en) * | 1996-03-25 | 1997-09-30 | Nitto Denko Corp | Polytetrafluoroethylene fiber and its production |
| WO1998026115A1 (en) * | 1996-12-13 | 1998-06-18 | Daikin Industries, Ltd. | Fibrous materials of fluororesins and deodorant and antibacterial fabrics made by using the same |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11300150A (en) * | 1998-04-22 | 1999-11-02 | Aqueous Reserch:Kk | Filter for cleaning air and air purifier using the same |
| JP2002011312A (en) * | 2000-06-29 | 2002-01-15 | Nitto Denko Corp | Incinerator exhaust gas treatment filter and its production method |
| US6884399B2 (en) | 2001-07-30 | 2005-04-26 | Carrier Corporation | Modular photocatalytic air purifier |
| US7758821B2 (en) | 2001-07-30 | 2010-07-20 | Carrier Corporation | Modular photocatalytic air purifier |
| US7951327B2 (en) | 2001-07-30 | 2011-05-31 | Carrier Corporation | Photocatalytic air purifier for a fan coil unit |
| JP2008126121A (en) * | 2006-11-20 | 2008-06-05 | Nissan Motor Co Ltd | Photocatalyst system for automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3963541B2 (en) | 2007-08-22 |
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