JPH0833856A - Charging filter - Google Patents
Charging filterInfo
- Publication number
- JPH0833856A JPH0833856A JP19294994A JP19294994A JPH0833856A JP H0833856 A JPH0833856 A JP H0833856A JP 19294994 A JP19294994 A JP 19294994A JP 19294994 A JP19294994 A JP 19294994A JP H0833856 A JPH0833856 A JP H0833856A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- conductive
- fiber
- filter medium
- filter
- 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
Landscapes
- Filtering Materials (AREA)
- Electrostatic Separation (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は濾材の表面に高圧電極と
接地電極とを設け、両電極間を荷電することにより、電
気的作用と濾材構造による物理的な作用とで塵埃を捕集
する荷電式フィルタに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a high-voltage electrode and a ground electrode on the surface of a filter medium, and charges between both electrodes to collect dust by an electric action and a physical action by a filter medium structure. The present invention relates to a charge type filter.
【０００２】[0002]
【従来の技術】従来から濾材の表面に金属網、金属蒸着
層などからなる電極を設けて、電極に荷電することによ
り、濾材構造による機械的な作用に加えて電気的な作用
によって塵埃を捕集するフィルタが知られている（実開
昭４９−１１０３８０号、実開昭５３−１５３２８２号
など）。しかし、これらのフィルタでは電極が濾材表面
の全体を覆っており、帯電された塵埃が電極の近傍に高
い密度で捕集されるため、目詰りが生じやすく、濾材寿
命が短くなるという問題があった。2. Description of the Related Art Conventionally, an electrode composed of a metal net, a metal vapor deposition layer, etc. is provided on the surface of a filter medium, and by charging the electrode, dust is trapped by an electrical action in addition to a mechanical action by the filter medium structure. Filters for collecting are known (Japanese Utility Model Laid-Open No. 49-110380, Japanese Utility Model Laid-Open No. 53-153228, etc.). However, in these filters, the electrode covers the entire surface of the filter medium, and charged dust is collected in the vicinity of the electrode at a high density, which easily causes clogging and shortens the life of the filter medium. It was
【０００３】一方、特開昭６３−３６８５２号、特開昭
６４−５８３５６号には、金属線、炭素繊維を用いるこ
とにより、または導電性ペーストの塗布などにより濾材
表面に線状または帯状の電極を形成した荷電式フィルタ
が開示されている。これらの荷電式フィルタでは、帯電
された塵埃が電極の近傍に集中しても電極が線状または
帯状で電極間に間隔があるため、塵埃が集中する部分と
集中する部分との間に空隙が残り、被処理気体の流路が
確保されているためフィルタが目詰りしにくいという利
点を有する。とくに、このフィルタを表面から垂直方向
に透過して見た場合に、高圧電極と接地電極とが交互に
なるように配置した荷電式フィルタでは、帯電された塵
埃が表裏の電極を結ぶ斜め方向に電気的な作用を受けて
濾材内で分散されて保持されやすくなるため、濾材が目
詰りするまでに捕集できる塵埃の保持容量も増える。On the other hand, in JP-A-63-36852 and JP-A-64-58356, linear or strip electrodes are formed on the surface of the filter medium by using a metal wire, carbon fiber, or by applying a conductive paste. Disclosed is a charge-type filter having a structure. In these charge filters, even if charged dust is concentrated in the vicinity of the electrodes, the electrodes are linear or strip-shaped and there is a space between the electrodes, so that there is a gap between the portion where the dust is concentrated and the portion where the dust is concentrated. In addition, since the flow path of the gas to be treated is secured, there is an advantage that the filter is unlikely to be clogged. In particular, when this filter is viewed through the surface in the vertical direction, in the charging type filter in which the high-voltage electrode and the ground electrode are arranged alternately, charged dust is obliquely connecting the front and back electrodes. Since it is easy to be dispersed and held in the filter medium due to the electrical action, the retention capacity of dust that can be collected before the filter medium is clogged is also increased.
【０００４】しかしながら、上記の荷電式フィルタにお
いては実質的に濾材の厚みよりも電極間の距離が遠くな
っており、しかも電極に線状または帯状の金属線や導電
性ペーストを用いているため、十分に塵埃を帯電しよう
とすると電極間に加える電圧をあげねばならず、火花放
電が起きるおそれがあった。このように、火花放電が起
きると電極間にある濾材が発火する危険があった。ま
た、濾材の効率を高めるためにプリーツ加工を施す場合
には、導電性ペーストを塗布した電極では折り曲げ部分
で導電性ペーストが脱落して断線が起きるおそれがあっ
た。However, in the above-mentioned charge-type filter, the distance between the electrodes is substantially larger than the thickness of the filter medium, and moreover, the wire or strip-shaped metal wire or conductive paste is used for the electrode. If the dust is to be sufficiently charged, the voltage applied between the electrodes must be increased, which may cause spark discharge. As described above, when spark discharge occurs, there is a risk that the filter medium between the electrodes is ignited. Further, when pleating is performed to increase the efficiency of the filter medium, there is a possibility that the conductive paste may fall off at the bent portion of the electrode coated with the conductive paste, resulting in disconnection.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記の従来技
術の欠点を解消すべくなされたものであり、低い電圧で
高い捕集効率が得られ、使用中に発火の心配がなく、プ
リーツ加工などの折り加工を施しても断線などのおそれ
がない荷電式フィルタを提供することを課題とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art. A high scavenging efficiency is obtained at a low voltage, there is no fear of ignition during use, and pleating is performed. An object of the present invention is to provide a charge-type filter that is free from the risk of wire breakage even when folding is performed.
【０００６】[0006]
【課題を解決するための手段】上記の課題は、本発明に
よる、濾材の表面に線状または帯状の電極が設けられて
おり、該濾材の一方表面に設けられた電極を高圧電極、
他方表面に設けられた電極を接地電極とした荷電式フィ
ルタにおいて、高圧電極または接地電極の少なくとも一
方を導電性を有する繊維の端面が表面に露出した素材か
ら形成したことを特徴とする荷電式フィルタによって解
決される。According to the present invention, a linear or strip-shaped electrode is provided on the surface of a filter medium, and the electrode provided on one surface of the filter medium is a high-voltage electrode.
In a charge-type filter having an electrode provided on the other surface as a ground electrode, at least one of a high-voltage electrode and a ground electrode is formed from a material in which an end face of a conductive fiber is exposed on the surface. Will be solved by.
【０００７】すなわち、本発明の荷電式フィルタでは、
導電性を有する繊維の端面が表面に多数露出した素材か
ら形成される線状または帯状の電極を使用することによ
って、低い電圧（印加電圧の絶対値が小さいことを意味
する）で塵埃を効率よく捕集することを可能にすると共
に、電極間の火花放電による濾材の発火を防止してい
る。また、本発明の荷電式フィルタは、電極に上記フィ
ルム又は不織布をベースとする導電性を有する繊維の端
面が表面に多数露出した素材を用いるため、プリーツ加
工が行いやすく、断線のおそれがない。That is, in the charge type filter of the present invention,
Efficiently removes dust at a low voltage (meaning that the absolute value of the applied voltage is small) by using a linear or band-shaped electrode made of a material with many end faces of electrically conductive fibers exposed on the surface. It is possible to collect and prevent ignition of the filter medium due to spark discharge between the electrodes. Further, in the charge-type filter of the present invention, the electrode is made of a material in which a large number of end faces of electrically conductive fibers based on the above-mentioned film or nonwoven fabric are exposed on the surface, so that pleating is easy to perform and there is no risk of disconnection.
【０００８】以下、図面に沿って本発明を説明する。図
１は本発明の荷電式フィルタの一例を示す斜視図であ
り、図２はその拡大断面模型図、図３は両表面に導電性
を有する繊維の端面が表面に露出した素材から形成され
る線状の電極を用いた荷電式フィルタの部分拡大断面模
型図、図４は本発明に使用する導電性を有する繊維の端
面が表面に露出した素材から形成される線状の電極の一
例を示す部分拡大図である。The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of the charge-type filter of the present invention, FIG. 2 is an enlarged cross-sectional model view thereof, and FIG. 3 is formed from a material in which end faces of electrically conductive fibers are exposed on both surfaces. FIG. 4 shows a partially enlarged cross-sectional model view of a charge-type filter using a linear electrode, and FIG. 4 shows an example of a linear electrode formed of a material having an exposed end face of a conductive fiber used in the present invention. FIG.
【０００９】本発明の荷電式フィルタに使用する濾材１
としては、レーヨン、コットン、パルプ繊維、ポリエス
テル繊維、ポリエチレン繊維、ポリプロピレン繊維、ポ
リ塩化ビニル繊維、ポリスチレン繊維、ポリカーボネー
ト繊維、ガラス繊維などからなる不織布、編織布、紙な
どや、ポリウレタンフォーム、ポリエチレンフォームな
どの樹脂発泡体などからなる誘電性のある濾材が適して
いる。Filter medium 1 used in the charge-type filter of the present invention
Examples of the non-woven fabric include rayon, cotton, pulp fiber, polyester fiber, polyethylene fiber, polypropylene fiber, polyvinyl chloride fiber, polystyrene fiber, polycarbonate fiber, glass fiber, etc., knitted fabric, paper, polyurethane foam, polyethylene foam, etc. A filter medium having a dielectric property, such as a resin foam, is suitable.
【００１０】本発明の荷電式フィルタにおいては、電極
の少なくとも一方が導電性を有する繊維の端面が表面に
多数露出した素材２から形成されている。このような素
材としては、例えば、導電性を有する短繊維を導電性フ
ィルムに接着したシート、導電性を有する短繊維を導電
性線材に接着した導電性ワイヤー、短繊維を機械的に絡
合した不織布に導電性物質を付着せしめた導電性不織
布、導電性を有する短繊維が機械的に絡合された導電性
不織布などが使用される。In the charge-type filter of the present invention, at least one of the electrodes is made of a material 2 having a large number of conductive fiber end surfaces exposed on the surface. Examples of such a material include a sheet in which conductive short fibers are bonded to a conductive film, a conductive wire in which conductive short fibers are bonded to a conductive wire material, and mechanically entangled short fibers. A conductive non-woven fabric obtained by adhering a conductive substance to the non-woven fabric, a conductive non-woven fabric in which electrically conductive short fibers are mechanically entangled, and the like are used.
【００１１】ここで、導電性を有する短繊維を導電性フ
ィルムに接着したシートとは、例えば図４に示すよう
に、金属箔、合成樹脂フィルムに金属を蒸着またはメッ
キしたもの、合成樹脂フィルムに導電性ペーストまたは
導電性塗料を塗布したものなどの導電性フィルム２１
に、金属繊維、金属蒸着した繊維、金属メッキした繊
維、導電性樹脂を被覆した繊維、染色技術により金属イ
オンを含有した繊維などの導電性繊維２２を繊維端面が
表面に多数露出するように接着したシートを言う。導電
性繊維２２の繊維長は、あまり短いと粉粒体状となって
放電が起きにくく、あまり長いとシート表面に露出する
繊維の端面が相対的に少なくなって電圧を低下させる効
果が期待できなくなるので、０．１〜５０ｍｍ、より好
ましくは０．３〜１０ｍｍの範囲にあることが望まし
い。また、このシートの場合、導電性繊維２２を導電性
フィルム２１に接着するための接着剤２３も、導電性物
質を含む導電性接着剤であることが望ましい。とくに、
静電植毛により導電性を有する短繊維を導電性フィルム
に付着したものは、導電性繊維の端面の多くが、シート
の表面に露出するのでよい。Here, a sheet in which conductive short fibers are adhered to a conductive film means, for example, as shown in FIG. 4, a metal foil, a synthetic resin film on which metal is vapor-deposited or plated, or a synthetic resin film. Conductive film 21 such as one coated with conductive paste or conductive paint
In addition, conductive fibers 22 such as metal fibers, metal vapor-deposited fibers, metal-plated fibers, fibers coated with a conductive resin, and fibers containing metal ions by a dyeing technique are bonded so that a large number of fiber end faces are exposed on the surface. Say the sheet you made. If the fiber length of the conductive fiber 22 is too short, it becomes powdery and discharge is unlikely to occur, and if it is too long, the end face of the fiber exposed on the sheet surface is relatively small and the effect of lowering the voltage can be expected. Since it disappears, it is desirable to be in the range of 0.1 to 50 mm, more preferably 0.3 to 10 mm. Further, in the case of this sheet, the adhesive 23 for adhering the conductive fiber 22 to the conductive film 21 is also preferably a conductive adhesive containing a conductive substance. Especially,
When the conductive fibers are attached to the conductive film by electrostatic flocking, most of the end faces of the conductive fibers are exposed on the surface of the sheet.
【００１２】また導電性を有する短繊維を導電性線材に
接着した導電性ワイヤーとは、樹脂やガラスの線材に導
電性樹脂、導電性塗料、導電性接着剤をコーティングし
たもの、または金属線などの導電性線材に、繊維長が
０．１〜５０ｍｍ、より好ましくは０．３〜１０ｍｍの
範囲の導電性を有する短繊維を接着したワイヤーを言
う。導電性線材の直径は０．１〜１０ｍｍ、より好まし
くは０．５〜５ｍｍの範囲にあることが望ましい。また
ワイヤーに付着させる導電性を有する短繊維の付着面積
は、ワイヤーの全表面積の０．５〜８０％、より好まし
くは２〜５０％であることが望ましく、この範囲より付
着面積が小さいと導電性を有する短繊維を付着させた効
果が期待できず、この範囲より付着面積が大きくてもそ
れ以上に効果は向上しない。導電性線材への導電性を有
する短繊維の接着は導電性接着剤によることが望まし
く、とくに静電植毛により導電性を有する短繊維を導電
性線材に付着したものは、導電性繊維の端面の多くが、
シートの表面に露出するのでよい。The conductive wire in which conductive short fibers are adhered to a conductive wire is a resin or glass wire coated with a conductive resin, a conductive paint, a conductive adhesive, or a metal wire. A wire in which a short fiber having a conductivity of 0.1 to 50 mm, and more preferably 0.3 to 10 mm is bonded to the conductive wire. The diameter of the conductive wire is preferably 0.1 to 10 mm, more preferably 0.5 to 5 mm. In addition, the adhesion area of the electrically conductive short fibers attached to the wire is preferably 0.5 to 80%, more preferably 2 to 50% of the total surface area of the wire. The effect of adhering short fibers having properties is not expected, and even if the adhering area is larger than this range, the effect is not further improved. Adhesion of conductive short fibers to the conductive wire is preferably performed with a conductive adhesive, and particularly, the one in which conductive short fibers are attached to the conductive wire by electrostatic flocking is used for the end face of the conductive fiber. Many
It may be exposed on the surface of the sheet.
【００１３】また短繊維を機械的に絡合した不織布に導
電性物質を付着せしめた導電性不織布とは、繊維長が１
〜１００ｍｍ、より好ましくは３〜７０ｍｍの短繊維か
らなる繊維ウェブを、水流絡合法、ニードルパンチ法な
どにより繊維どうしを機械的に絡合せしめた不織布に、
金属、導電性樹脂などの導電性物質を付着せしめて、導
電性を有する繊維の端面が不織布表面に多数露出するよ
うにしたものをいう。とくに、不織布を構成する繊維に
分割型複合繊維を用いたものは、微細な繊維端面を多数
表面に露出させることができるのでよい。不織布の繊維
ウェブ形成手段としては湿式法、乾式法のいずれであっ
てもよいが、繊維の結合手段としては機械的絡合法を用
いる必要がある。これは、例えば加熱加圧などにより繊
維を接着する製造方法による不織布では、繊維が平面方
向に寝てしまい、不織布表面に露出する繊維の数が著し
く減少するからである。同様の理由から、フィラメント
などの長繊維からなる不織布も望ましくない。不織布へ
の導電性物質の付着方法としては、導電性物質が銅、ニ
ッケルなどの金属であれば蒸着またはメッキによるのが
よく、ポリピロール、ポリチオフェンなどの導電性樹脂
であれば、気相あるいは液相中において不織布表面で直
接重合させるのがよい。なお、導電性物質の付着は不織
布の構成繊維の全表面に渡って付着していることが望ま
しい。この導電性不織布の目付は、あまり小さいと製作
が困難であり、あまり大きいとフィルタの圧力損失を上
昇させる傾向があるので５〜２００ｇ／ｍ2 、より好ま
しくは１０〜１００ｇ／ｍ2 の範囲にあるのがよい。ま
た、導電性不織布の厚みも同様の理由から０．０２〜２
ｍｍの範囲にあるのがよい。また、付着する導電性物質
の量は金属であれば１０〜４０ｇ／ｍ2 、導電性樹脂で
あれば２〜１０ｇ／ｍ2 の範囲にあるのがよい。A conductive non-woven fabric obtained by adhering a conductive substance to a non-woven fabric in which short fibers are mechanically entangled has a fiber length of 1
To 100 mm, more preferably 3 to 70 mm, a fiber web composed of short fibers is formed into a nonwoven fabric in which fibers are mechanically entangled by a hydroentangling method, a needle punching method, or the like.
It refers to a material obtained by adhering a conductive substance such as metal or conductive resin so that a large number of end faces of conductive fibers are exposed on the surface of the nonwoven fabric. In particular, those using splittable conjugate fibers as the fibers constituting the non-woven fabric are preferable because many fine fiber end faces can be exposed on the surface. Either a wet method or a dry method may be used as the means for forming the fibrous web of the nonwoven fabric, but it is necessary to use the mechanical entanglement method as the means for binding the fibers. This is because, for example, in a non-woven fabric manufactured by a method of adhering fibers by heating and pressing, the fibers lie in the plane direction, and the number of fibers exposed on the surface of the non-woven fabric is significantly reduced. For the same reason, non-woven fabrics made of long fibers such as filaments are also undesirable. As a method of attaching the conductive substance to the non-woven fabric, if the conductive substance is a metal such as copper or nickel, vapor deposition or plating is preferable, and if it is a conductive resin such as polypyrrole or polythiophene, a vapor phase or a liquid phase is preferable. It is preferable to polymerize directly on the surface of the nonwoven fabric. In addition, it is desirable that the conductive substance is attached to the entire surface of the constituent fibers of the nonwoven fabric. If the basis weight of this conductive non-woven fabric is too small, it is difficult to manufacture, and if it is too large, the pressure loss of the filter tends to increase, so it is in the range of 5 to 200 g / m 2 , more preferably 10 to 100 g / m 2 . Good to have. The thickness of the conductive non-woven fabric is 0.02 to 2 for the same reason.
It should be in the range of mm. Further, the amount of the conductive substance to be adhered is preferably in the range of 10 to 40 g / m 2 for the metal and 2 to 10 g / m 2 for the conductive resin.
【００１４】導電性を有する短繊維が機械的に絡合され
た導電性不織布とは、金属繊維、金属蒸着した繊維、金
属メッキした繊維、導電性樹脂を被覆した繊維、染色技
術により金属イオンを含有した繊維などの導電性繊維で
あって、繊維長が１〜１００ｍｍ、より好ましくは３〜
７０ｍｍの繊維を使用し、これら導電性繊維からなる繊
維ウェブを水流絡合法またはニードルパンチ法などの機
械的絡合法により絡合せしめて、導電性繊維の端面が不
織布表面に多数露出するようにした不織布をいう。この
導電性不織布の目付は、あまり小さいと製作が困難であ
り、あまり大きいとフィルタの圧力損失を上昇させる傾
向があるので５〜２００ｇ／ｍ2 、より好ましくは１０
〜１００ｇ／ｍ2 の範囲にあるのがよい。また、導電性
不織布の厚みも同様の理由から０．０２〜２ｍｍの範囲
にあるのがよい。A conductive non-woven fabric in which electrically conductive short fibers are mechanically entangled means a metal fiber, a metal vapor-deposited fiber, a metal-plated fiber, a fiber coated with a conductive resin, or a metal ion by a dyeing technique. Conductive fibers such as contained fibers having a fiber length of 1 to 100 mm, more preferably 3 to
70 mm fibers were used, and a fiber web composed of these conductive fibers was entangled by a mechanical entanglement method such as a hydroentanglement method or a needle punching method so that a large number of end faces of the electrically conductive fibers were exposed on the nonwoven fabric surface. Non-woven fabric. If the basis weight of this conductive non-woven fabric is too small, it is difficult to manufacture, and if it is too large, it tends to increase the pressure loss of the filter, so that it is 5 to 200 g / m 2 , and more preferably 10
It is better to be in the range of up to 100 g / m 2 . In addition, the thickness of the conductive non-woven fabric is preferably in the range of 0.02 to 2 mm for the same reason.
【００１５】本発明の荷電式フィルタは、図２に示すよ
うに濾材１の一方表面に導電性繊維の端面が表面に多数
露出した素材からなる線状または帯状の電極２が、他方
表面に金属箔、導電性フィルム、導電性ペースト、金属
線などからなる線状または帯状の電極３が設けられた構
造からなるか、または図３に示すように濾材１の両表面
に、導電性繊維の端面が表面に露出した素材からなる線
状または帯状の電極２が設けられた構造からなる。電極
間に荷電される電圧を低下させる効果は、少なくとも一
方の電極が導電性繊維の端面が表面に露出した素材から
なる線状または帯状の電極２で構成されていれば得られ
る。In the charge type filter of the present invention, as shown in FIG. 2, a linear or strip electrode 2 made of a material having a large number of end faces of conductive fibers exposed on one surface of a filter medium 1 and a metal on the other surface. It has a structure in which a linear or strip-shaped electrode 3 made of foil, a conductive film, a conductive paste, a metal wire, or the like is provided, or as shown in FIG. Has a structure in which a linear or strip electrode 2 made of a material exposed on the surface is provided. The effect of lowering the voltage charged between the electrodes can be obtained if at least one of the electrodes is composed of the linear or strip electrode 2 made of a material in which the end face of the conductive fiber is exposed on the surface.
【００１６】また、濾材１の気体流入側表面と気体流出
側表面のいずれの側の電極を高圧電極としても接地電極
としてもよいが、上記導電性繊維の端面が表面に露出し
た素材からなる電極２は気体流入側に設けることが望ま
しい。これは、この導電性繊維の端面が表面に露出した
素材からなる電極２が実質的に放電極として働き、塵埃
はこの放電極と同じ極に帯電されるからであり、上流側
で帯電を受けた塵埃は下流側の電極の近傍に電気的な作
用で引き付けられて捕集されるからである。これに対し
て放電極が下流側にある場合、塵埃は気流の流れに沿っ
て上流側から下流側へと移動するが、帯電された塵埃と
下流側の極が同極となって反発するため電気的な作用に
よる塵埃の捕集が十分に寄与しないことがある。The electrode on either the gas inflow side surface or the gas outflow side surface of the filter medium 1 may be a high voltage electrode or a ground electrode, but an electrode made of a material in which the end face of the conductive fiber is exposed on the surface. 2 is preferably provided on the gas inflow side. This is because the electrode 2 made of a material in which the end face of the conductive fiber is exposed on the surface substantially acts as a discharge electrode, and dust is charged to the same pole as this discharge electrode, so that it is charged on the upstream side. This is because the dust is attracted to and collected by the electrical action in the vicinity of the electrode on the downstream side. On the other hand, when the discharge electrode is on the downstream side, dust moves from the upstream side to the downstream side along the flow of the air flow, but the charged dust and the downstream pole repel because they are the same pole. In some cases, the collection of dust due to electrical action does not contribute sufficiently.
【００１７】本発明に使用する電極は、線状または帯状
の電極からなり、所定の間隔をあけて濾材１の表面に設
けられている。このため、電気的な作用で塵埃が電極の
近傍にひきつけられても、濾材の表面方向では塵埃が集
中する部分と集中する部分との間に捕集される塵埃量の
少ない部分が生じて被処理気体の流路が確保され、濾材
の厚み方向では塵埃が蓄積されていくので、濾材の目詰
りが生じにくく、使用寿命が長くなる。The electrode used in the present invention is composed of a linear or strip-shaped electrode and is provided on the surface of the filter medium 1 at a predetermined interval. For this reason, even if dust is attracted to the vicinity of the electrode by an electric action, a portion with a small amount of dust collected is generated between the portion where the dust is concentrated and the portion where the dust is concentrated in the surface direction of the filter medium. Since the flow path of the processing gas is secured and dust accumulates in the thickness direction of the filter medium, the filter medium is less likely to be clogged and the service life is extended.
【００１８】とくに、濾材の表面に対して垂直な方向か
ら透過して見た場合に、濾材の一方表面に設けた線状ま
たは帯状の高圧電極と他方表面に設けた線状または帯状
の接地電極とが交互になるように配置した場合、荷電時
に、濾材内に表裏の電極を結ぶ斜め方向の長い距離に電
界が形成されるため、局部的な目詰りを起こさずに塵埃
が濾材内部に効果的に分散して捕集されやすく、塵埃の
保持量を多くでき、使用寿命も延びる。In particular, when seen from a direction perpendicular to the surface of the filter medium, a linear or strip high-voltage electrode provided on one surface of the filter medium and a linear or strip ground electrode provided on the other surface. When the and are arranged alternately, an electric field is formed in the filter medium at a long distance in the diagonal direction connecting the front and back electrodes during charging, so that dust is effective inside the filter medium without causing local clogging. Are easily dispersed and collected, the amount of dust held can be increased, and the service life is extended.
【００１９】線状または帯状の電極の長さや幅、電極ど
うしの間隔は、使用する濾材の大きさや厚みなどにより
適宜設定される。しかし、電極の幅があまり狭いと断線
のおそれがあり、あまり広いとフィルタの圧力損失や放
電効果の低下を招くことがあるので電極の幅は０．５〜
１０ｍｍ、より好ましくは１〜５ｍｍの範囲にあること
が望ましい。また、電極と電極との間隔は、あまり広い
と高電圧を必要とするようになり、あまり狭いと圧力損
失の上昇や短絡が生じるおそれがあるので電極どうしの
間隔は２〜４０ｍｍ、より好ましくは５〜２０ｍｍの範
囲にあることが望ましい。The length and width of the linear or strip electrode and the interval between the electrodes are appropriately set depending on the size and thickness of the filter medium used. However, if the width of the electrode is too narrow, the wire may be broken, and if it is too wide, the pressure loss of the filter and the discharge effect may be reduced.
It is desirable to be in the range of 10 mm, more preferably 1 to 5 mm. Further, if the distance between the electrodes is too wide, a high voltage is required, and if it is too narrow, pressure loss may increase and a short circuit may occur. Therefore, the distance between the electrodes is 2 to 40 mm, more preferably It is desirable to be in the range of 5 to 20 mm.
【００２０】また、各電極は、個々に高圧電源などと接
続されて高圧電極とし、アースして接地電極とされてい
てもよいが、例えば図１のように、濾材の同一表面にあ
る電極の一端を連結し、連結した電極を高圧電源と接続
したり、アースしたりしてもよい。Each electrode may be individually connected to a high-voltage power source or the like to serve as a high-voltage electrode, and may be grounded to serve as a ground electrode. For example, as shown in FIG. 1, electrodes on the same surface of the filter medium may be used. One end may be connected, and the connected electrode may be connected to a high voltage power supply or may be grounded.
【００２１】電極は濾材表面に接着剤により貼着した
り、熱接着により接合したりすることにより、濾材と一
体化してもよく、また、使用時だけ濾材表面に固定して
取り外し可能にしてもよい。後者の場合、濾材のみを交
換するだけで繰り返し荷電式フィルタとして使用でき
る。なお、導電性を有する繊維の端面が表面に露出した
素材からなる電極を、濾材表面に取り付ける場合には、
この導電性を有する繊維の端面が濾材に電極を取り付け
た後も表面に露出するようにすることが望ましい。これ
は繊維の端面が露出した側を濾材との接着面に持ってく
ると、繊維が押え付けられて放電が起きにくくなり、よ
り低い電圧で塵埃を帯電させることが困難になるからで
ある。The electrode may be integrated with the filter medium by adhering it to the surface of the filter medium with an adhesive or joining it by heat bonding, or may be fixed to the surface of the filter medium only when it is used and removable. Good. In the latter case, it can be used as a rechargeable filter repeatedly only by changing the filter medium. When an electrode made of a material in which the end face of the conductive fiber is exposed on the surface is attached to the surface of the filter medium,
It is desirable that the end face of the electrically conductive fiber is exposed on the surface even after the electrode is attached to the filter medium. This is because if the side where the end face of the fiber is exposed is brought to the adhesive surface with the filter medium, the fiber will be pressed down and discharge will be less likely to occur, and it will be difficult to charge the dust at a lower voltage.
【００２２】[0022]
実施例１ 繊度１．５デニールのポリエステル繊維からなる繊維ウ
ェブに水流絡合処理を施し、目付６６ｇ／ｍ2 、厚さ
０．４５ｍｍの水流絡合不織布を作成した。この水流絡
合不織布に銅−ニッケルメッキ（付着重量２８ｇ／ｍ
2 ）を施して体積抵抗３．３×１０-3Ω・ｃｍの電極素
材を得た。一方、繊度１．５デニールのレーヨン繊維１
００重量％からなる目付７０ｇ／ｍ2 の密層と、繊度
１．５デニールのレーヨン繊維７０重量％、繊度３デニ
ールのポリエステル繊維２０重量％及び繊度５デニール
のポリエステル繊維１０重量％とからなる目付６５ｇ／
ｍ2 の中間層と、繊度１．５デニールのレーヨン繊維４
０重量％、繊度３デニールのポリエステル繊維４０重量
％及び繊度５デニールのポリエステル繊維２０重量％と
からなる目付５０ｇ／ｍ2 の粗層とを積層し、ニードル
パンチ処理した後、アクリル樹脂系エマルジョン（固形
分付着量９０ｇ／ｍ2 ）を付着し、乾燥して、３層構造
で目付２７５ｇ／ｍ2 、厚さ３ｍｍの不織布からなる濾
材を作成した。上記の濾材の表裏面に、上記電極素材を
図１のようにくし型に裁断したものを、アクリル樹脂系
接着剤により貼着して荷電式フィルタを得た。なお、線
状の電極の幅は２ｍｍで隣り合う線状電極と線状電極と
の間隔は約１９ｍｍとした。また、図１のように表裏面
の線状電極は、濾材の表面に対して垂直な方向から見た
場合に交互の位置となるようにした。この場合、最も近
い位置にある表面の線状電極と裏面の線状電極との距離
は約９ｍｍであった。得られた荷電式フィルタの気体流
出面側の電極をアースして接地電極とし、気体流入面側
の電極を高圧電源と接続して高圧電極とし、荷電する電
圧を変えて、各印加電圧における荷電式フィルタの捕集
効率を測定した。測定には大気塵を使用し、風速５ｃｍ
／秒の条件でフィルタに通過させ、通過前後での粒径
０．３〜０．５μｍの塵埃の粒子数をパーティクルカウ
ンターによって測定して捕集効率を求めた。その結果を
表１に示す。Example 1 A hydroentangled nonwoven fabric having a basis weight of 66 g / m 2 and a thickness of 0.45 mm was prepared by subjecting a fiber web made of polyester fibers having a fineness of 1.5 denier to hydroentangling treatment. Copper-nickel plating (adhesion weight 28 g / m
2 ) was applied to obtain an electrode material having a volume resistance of 3.3 × 10 −3 Ω · cm. On the other hand, rayon fiber 1 with a fineness of 1.5 denier
A basis weight consisting of a dense layer having a basis weight of 70 g / m 2 consisting of 00% by weight, 70% by weight of rayon fibers having a fineness of 1.5 denier, 20% by weight of polyester fibers having a fineness of 3 denier and 10% by weight of polyester fibers having a fineness of 5 denier. 65 g /
m 2 middle layer and rayon fiber 4 with a fineness of 1.5 denier
A coarse layer having a basis weight of 50 g / m 2 consisting of 0% by weight, 40% by weight of a polyester fiber having a fineness of 3 denier and 20% by weight of a polyester fiber having a fineness of 5 denier was laminated, needle-punched, and then an acrylic resin emulsion ( A solid content deposition amount of 90 g / m 2 ) was deposited and dried to prepare a filter medium composed of a nonwoven fabric having a three-layer structure and a basis weight of 275 g / m 2 and a thickness of 3 mm. The electrode material cut into a comb shape as shown in FIG. 1 was attached to the front and back surfaces of the above filter material with an acrylic resin adhesive to obtain a charge-type filter. The width of the linear electrodes was 2 mm, and the distance between the adjacent linear electrodes was about 19 mm. Further, as shown in FIG. 1, the linear electrodes on the front and back surfaces are arranged at alternate positions when viewed from a direction perpendicular to the surface of the filter medium. In this case, the distance between the closest linear electrode on the front surface and the linear electrode on the rear surface was about 9 mm. The electrode on the gas outflow side of the obtained charge-type filter is grounded to serve as a ground electrode, and the electrode on the gas inflow side is connected to a high-voltage power supply to serve as a high-voltage electrode. The collection efficiency of the formula filter was measured. Air dust is used for measurement, wind speed 5 cm
The particles were allowed to pass through the filter under the condition of / sec, and the number of dust particles having a particle diameter of 0.3 to 0.5 μm before and after passing was measured by a particle counter to obtain the collection efficiency. Table 1 shows the results.
【００２３】実施例２ ポリエステル／ポリアミド分割型繊維（鐘紡株式会社製
ベリーマＸ、分割後の繊維径０．１８デニール／０．
６デニール）からなる繊維ウェブを水流絡合処理するこ
とによって、繊維の分割と共に繊維を絡合して、目付９
０ｇ／ｍ2 、厚さ０．５ｍｍの水流絡合不織布を作成し
た。この水流絡合不織布の表面に気相中でピロール重合
体を直接重合させることにより付着（付着重量５ｇ／ｍ
2 ）させ、体積抵抗１．０×１０1 Ω・ｃｍの電極素材
を得た。実施例１で用いた電極素材に変えて、この電極
素材を用いたこと以外は、実施例１と同様にして荷電式
フィルタを得た。得られた荷電式フィルタの各印加電圧
下における捕集効率を実施例１と同様にして測定し、表
１に示した。Example 2 Polyester / polyamide splittable fiber (Berima X manufactured by Kanebo Ltd., fiber diameter after splitting 0.18 denier / 0.
By hydroentangling the fiber web composed of 6 denier), the fibers are entangled together with the division of the fibers, and the basis weight 9
A hydroentangled non-woven fabric having a thickness of 0 g / m 2 and a thickness of 0.5 mm was prepared. Attached by directly polymerizing the pyrrole polymer in the gas phase on the surface of this hydroentangled nonwoven fabric (adhesion weight 5 g / m
2 ) to obtain an electrode material having a volume resistance of 1.0 × 10 1 Ω · cm. A charged filter was obtained in the same manner as in Example 1 except that this electrode material was used instead of the electrode material used in Example 1. The collection efficiency of the obtained charge-type filter under each applied voltage was measured in the same manner as in Example 1, and is shown in Table 1.
【００２４】比較例１ 実施例１の電極素材に変えて、厚さ２０μｍのアルミニ
ウム箔を電極素材として用いたこと以外は、実施例１と
同様にして荷電式フィルタを得た。得られた荷電式フィ
ルタの各印加電圧下における捕集効率を実施例１と同様
にして測定し、表１に示した。Comparative Example 1 A charged filter was obtained in the same manner as in Example 1 except that an aluminum foil having a thickness of 20 μm was used as an electrode material instead of the electrode material of Example 1. The collection efficiency of the obtained charge-type filter under each applied voltage was measured in the same manner as in Example 1, and is shown in Table 1.
【００２５】比較例２ 実施例１で用いた濾材に、固形分としてカーボン６０重
量％とアクリル系樹脂４０重量％とを含むカーボンペー
ストを、図１のようにくし型に塗布して荷電式フィルタ
を得た。なお、塗布により形成した線状の電極の幅は２
ｍｍで隣り合う線状電極と線状電極との間隔は約１９ｍ
ｍとした。また、図１のように表裏面の線状電極は、濾
材の表面に対して垂直な方向から見た場合に交互の位置
となるようにした。この場合、最も近い位置にある表面
の線状電極と裏面の線状電極との距離は約９ｍｍであっ
た。得られた荷電式フィルタの各印加電圧下における捕
集効率を実施例１と同様にして測定し、表１に示した。COMPARATIVE EXAMPLE 2 The filter medium used in Example 1 was coated with a carbon paste containing 60% by weight of carbon and 40% by weight of acrylic resin as solids in a comb shape as shown in FIG. Got The width of the linear electrode formed by coating is 2
The distance between adjacent linear electrodes is about 19m
m. Further, as shown in FIG. 1, the linear electrodes on the front and back surfaces are arranged at alternate positions when viewed from a direction perpendicular to the surface of the filter medium. In this case, the distance between the closest linear electrode on the front surface and the linear electrode on the rear surface was about 9 mm. The collection efficiency of the obtained charge-type filter under each applied voltage was measured in the same manner as in Example 1, and is shown in Table 1.
【００２６】比較例３ 繊度１．５デニールのポリエステル繊維からなる繊維ウ
ェブをカレンダーロールにより加熱加圧処理して、目付
６０ｇ／ｍ2 、厚さ０．０７５ｍｍの熱接着不織布を作
成した。この熱接着不織布に銅−ニッケルメッキ（付着
量１２．５ｇ／ｍ2 ）を施して体積抵抗１．３×１０-4
Ω・ｃｍの電極素材を得た。実施例１で用いた電極素材
に変えて、この電極素材を用いたこと以外は、実施例１
と同様にして荷電式フィルタを得た。得られた荷電式フ
ィルタの各印加電圧下における捕集効率を実施例１と同
様にして測定し、表１に示した。Comparative Example 3 A fibrous web made of polyester fiber having a fineness of 1.5 denier was heated and pressed by a calender roll to prepare a heat-bonded nonwoven fabric having a basis weight of 60 g / m 2 and a thickness of 0.075 mm. This heat-bonded nonwoven fabric is plated with copper-nickel (adhesion amount: 12.5 g / m 2 ) to obtain a volume resistance of 1.3 × 10 −4.
An electrode material of Ω · cm was obtained. Example 1 except that this electrode material was used instead of the electrode material used in Example 1.
A charged filter was obtained in the same manner as in. The collection efficiency of the obtained charge-type filter under each applied voltage was measured in the same manner as in Example 1, and is shown in Table 1.
【００２７】[0027]
【表１】 [Table 1]
【００２８】表１から明らかなように、処理風速５ｃｍ
／秒の条件下では、実施例１、２の荷電式フィルタでは
印加電圧が−３ＫＶで９０％を超える高い捕集効率を示
すのに対して、比較例１〜３の荷電式フィルタでは印加
電圧を−４ＫＶにしても捕集効率は８０％未満であっ
た。As is clear from Table 1, the processing wind speed is 5 cm.
Under the condition of / sec, the charged filters of Examples 1 and 2 show a high collection efficiency of more than 90% at an applied voltage of -3 KV, whereas the charged filters of Comparative Examples 1 to 3 show an applied voltage. Even at -4 KV, the collection efficiency was less than 80%.
【００２９】実施例３ 厚さ２０μｍのアルミニウム箔に、固形分３５重量％の
カーボンペースト（固形分中、カーボン約６０重量％、
アクリル樹脂約４０重量％を含む）からなる導電性接着
剤を塗布した後、繊度２デニール、繊維長０．５ｍｍの
染色技術により金属イオンを含有した導電性繊維（日本
蚕毛染色株式会社 サンダーロンＳＳ−Ｎ）をふりかけ
て乾燥し、余分な導電性繊維を払い落として体積抵抗１
×１０2Ω・ｃｍの電極素材を得た。なお、付着した導
電性繊維の量は１０ｇ／ｍ2 であった。 一方、繊度
１．５デニールのレーヨン繊維１００重量％からなる目
付７０ｇ／ｍ2 の密層と、繊度１．５デニールのレーヨ
ン繊維７０重量％、繊度３デニールのポリエステル繊維
２０重量％及び繊度５デニールのポリエステル繊維１０
重量％とからなる目付６５ｇ／ｍ2 の中間層と、繊度
１．５デニールのレーヨン繊維４０重量％、繊度３デニ
ールのポリエステル繊維４０重量％及び繊度５デニール
のポリエステル繊維２０重量％とからなる目付５０ｇ／
ｍ2 の粗層とを積層し、ニードルパンチ処理した後、ア
クリル樹脂系エマルジョン（固形分付着量９０ｇ／ｍ
2 ）を付着し、乾燥して、３層構造で目付２７５ｇ／ｍ
2 、厚さ３ｍｍの不織布からなる濾材を作成した。上記
の濾材の表裏面に、上記電極素材を図１のようにくし型
に裁断したものを、アクリル系接着剤により貼着して荷
電式フィルタを得た。なお、線状の電極の幅は２ｍｍで
隣り合う線状電極と線状電極との間隔は約１９ｍｍとし
た。また、図１のように表裏面の線状電極は、濾材の表
面に対して垂直な方向から見た場合に交互の位置となる
ようにした。この場合、最も近い位置にある表面の線状
電極と裏面の線状電極との距離は約９ｍｍであった。得
られた荷電式フィルタの気体流出面側の電極をアースし
て接地電極とし、気体流入面側の電極を高圧電源と接続
して高圧電極とし、荷電する電圧を変えて、各印加電圧
における荷電式フィルタの捕集効率を測定した。測定に
は大気塵を使用し、風速１０ｃｍ／秒の条件でフィルタ
に通過させ、通過前後での粒径０．３〜０．５μｍの塵
埃の粒子数をパーティクルカウンターによって測定して
捕集効率を求めた。その結果を表２に示す。Example 3 Carbon paste having a solid content of 35% by weight (about 60% by weight of carbon in the solid content,
After applying a conductive adhesive consisting of acrylic resin (containing about 40% by weight), conductive fibers containing metal ions by a dyeing technique with a fineness of 2 denier and a fiber length of 0.5 mm (Sandaron Dyeing Co., Ltd. Japan) SS-N) is sprinkled and dried, and the excess conductive fiber is brushed off to give a volume resistance of 1
An electrode material of × 10 2 Ω · cm was obtained. The amount of conductive fibers attached was 10 g / m 2 . On the other hand, a dense layer having a basis weight of 70 g / m 2 consisting of 100% by weight of rayon fiber having a fineness of 1.5 denier, 70% by weight of rayon fiber having a fineness of 1.5 denier, 20% by weight of polyester fiber having a fineness of 3 denier and 5 denier of fineness Polyester fiber 10
A weight per unit area of 65 g / m 2 of 40% by weight of rayon fiber having a fineness of 1.5 denier, 40% by weight of polyester fiber having a fineness of 3 denier and 20% by weight of polyester fiber having a fineness of 5 denier. 50 g /
m 2 rough layer is laminated and needle punched, then acrylic resin emulsion (solid content 90 g / m 2)
2 ) is attached and dried to have a three-layer structure with a basis weight of 275 g / m 2.
2. A filter material made of non-woven fabric having a thickness of 3 mm was prepared. The electrode material cut into a comb shape as shown in FIG. 1 was attached to the front and back surfaces of the above-mentioned filter material with an acrylic adhesive to obtain a charge-type filter. The width of the linear electrodes was 2 mm, and the distance between the adjacent linear electrodes was about 19 mm. Further, as shown in FIG. 1, the linear electrodes on the front and back surfaces are arranged at alternate positions when viewed from a direction perpendicular to the surface of the filter medium. In this case, the distance between the closest linear electrode on the front surface and the linear electrode on the rear surface was about 9 mm. The electrode on the gas outflow surface side of the obtained charge-type filter is grounded to serve as a ground electrode, and the electrode on the gas inflow surface side is connected to a high-voltage power supply to serve as a high-voltage electrode. The collection efficiency of the formula filter was measured. Atmospheric dust was used for measurement, passed through a filter at a wind speed of 10 cm / sec, and the number of dust particles with a particle size of 0.3 to 0.5 μm before and after passing was measured by a particle counter to improve collection efficiency. I asked. The results are shown in Table 2.
【００３０】実施例４ 繊度２デニール、繊維長５１ｍｍの導電性繊維（日本蚕
毛染色株式会社 サンダーロンＳＳ−Ｎ）からなる繊維
ウェブを水流絡合処理して、目付８０ｇ／ｍ2、厚さ
１．３ｍｍ、体積抵抗１×１０0 Ω・ｃｍの水流絡合不
織布からなる電極素材を得た。実施例３で用いた電極素
材に変えて、この電極素材を用いたこと以外は、実施例
３と同様にして荷電式フィルタを得た。得られた荷電式
フィルタの各印加電圧下における捕集効率を実施例３と
同様にして測定し、表２に示した。Example 4 A fiber web made of conductive fibers having a fineness of 2 denier and a fiber length of 51 mm (Nippon Silkworm Dyeing Co., Ltd., Sanderlon SS-N) was hydroentangled to give a basis weight of 80 g / m 2 and a thickness. An electrode material composed of a hydroentangled nonwoven fabric having a volume resistance of 1 × 10 0 Ω · cm of 1.3 mm was obtained. A charged filter was obtained in the same manner as in Example 3 except that this electrode material was used instead of the electrode material used in Example 3. The collection efficiency of the obtained charge-type filter under each applied voltage was measured in the same manner as in Example 3 and is shown in Table 2.
【００３１】実施例５ 直径２ｍｍの銅線にカーボンペースト（固形分：カーボ
ン約６０重量％、アクリル樹脂約４０重量％）をコーテ
ィングした後、繊度２デニール、繊維長０．５ｍｍの導
電性短繊維（日本蚕毛染色株式会社 サンダーロンＳＳ
−Ｎ）を植毛して導電性ワイヤーからなる電極素材を得
た。銅線の全表面積に対する導電性短繊維の付着面積の
割合は４％であった。上記電極素材を実施例３で用いた
のと同じ濾材の表裏面に、図１のようにくし型に成形し
たものを配置して荷電式フィルタを得た。なお、導電性
ワイヤーからなる線状電極と線状電極との間隔は約１９
ｍｍとした。また、図１のように表裏面の線状電極は、
濾材の表面に対して垂直な方向から見た場合に交互の位
置となるようにした。この場合、最も近い位置にある表
面の線状電極と裏面の線状電極との距離は約９ｍｍであ
った。得られた荷電式フィルタの各印加電圧下における
捕集効率を実施例３と同様にして測定し、表２に示し
た。Example 5 A copper wire having a diameter of 2 mm was coated with a carbon paste (solid content: about 60% by weight of carbon, about 40% by weight of acrylic resin), and then a conductive short fiber having a fineness of 2 denier and a fiber length of 0.5 mm. (Japan Silkworm Dyeing Co., Ltd. Thunderon SS
-N) was flocked to obtain an electrode material composed of a conductive wire. The ratio of the area where the conductive short fibers were attached to the total surface area of the copper wire was 4%. A charge-type filter was obtained by arranging the above electrode material, which was formed in a comb shape as shown in FIG. 1, on the front and back surfaces of the same filter medium as used in Example 3. The distance between the linear electrodes made of conductive wires is about 19 mm.
mm. Also, as shown in FIG. 1, the linear electrodes on the front and back surfaces are
The positions were alternately arranged when viewed from the direction perpendicular to the surface of the filter medium. In this case, the distance between the closest linear electrode on the front surface and the linear electrode on the rear surface was about 9 mm. The collection efficiency of the obtained charge-type filter under each applied voltage was measured in the same manner as in Example 3 and is shown in Table 2.
【００３２】比較例４ 実施例３の電極素材に変えて、厚さ２０μｍのアルミニ
ウム箔を電極素材として用いたこと以外は、実施例３と
同様にして荷電式フィルタを得た。得られた荷電式フィ
ルタの各印加電圧下における捕集効率を実施例３と同様
にして測定し、表２に示した。Comparative Example 4 A charged filter was obtained in the same manner as in Example 3 except that an aluminum foil having a thickness of 20 μm was used as an electrode material instead of the electrode material of Example 3. The collection efficiency of the obtained charge-type filter under each applied voltage was measured in the same manner as in Example 3 and is shown in Table 2.
【００３３】[0033]
【表２】 [Table 2]
【００３４】表２から明らかなように、処理風速１０ｃ
ｍ／秒の条件下において、実施例３〜５では印加電圧−
５ＫＶにおいて９０％を超える高い捕集効率を示した
が、比較例４では印加電圧を−６ＫＶにしても捕集効率
は８０％未満であった。As is clear from Table 2, the processing wind speed is 10c.
Under the conditions of m / sec, the applied voltage in Examples 3 to 5 was −
At 5 KV, a high collection efficiency exceeding 90% was exhibited, but in Comparative Example 4, the collection efficiency was less than 80% even when the applied voltage was -6 KV.
【００３５】実施例６ 繊度１．５デニールのポリエステル繊維からなる繊維ウ
ェブに水流絡合処理を施し、目付６６ｇ／ｍ2 、厚さ
０．４５ｍｍの水流絡合不織布を作成した。この水流絡
合不織布に銅−ニッケルメッキ（付着重量２８ｇ／ｍ
2 ）を施して体積抵抗３×１０-3 Ω・ｃｍの電極素材
を得た。一方、繊度１．５デニールのレーヨン繊維１０
０重量％からなる目付７０ｇ／ｍ2 の密層と、繊度１．
５デニールのレーヨン繊維７０重量％、繊度３デニール
のポリエステル繊維２０重量％及び繊度５デニールのポ
リエステル繊維１０重量％とからなる目付６５ｇ／ｍ2
の中間層と、繊度１．５デニールのレーヨン繊維４０重
量％、繊度３デニールのポリエステル繊維４０重量％及
び繊度５デニールのポリエステル繊維２０重量％とから
なる目付５０ｇ／ｍ2 の粗層とを積層し、ニードルパン
チ処理した後、アクリル樹脂系エマルジョン（固形分付
着量９０ｇ／ｍ2 ）を付着し、乾燥して、３層構造で目
付２７５ｇ／ｍ2 、厚さ３ｍｍの不織布からなる濾材を
作成した。上記の濾材の気体流入側となる表面に、上記
の水流絡合不織布に銅−ニッケルメッキした電極素材を
図１のようにくし型に裁断したものを、アクリル樹脂系
接着剤により貼着し、気体流出側となる表面に、厚さ２
０μｍのアルミニウム箔からなる電極素材を図１のよう
にくし型に裁断したものをアクリル樹脂系接着剤により
貼着して荷電式フィルタを得た。なお、線状の電極の幅
は２ｍｍで隣り合う線状電極と線状電極との間隔は約１
９ｍｍとした。また、図１のように表裏面の線状電極
は、濾材の表面に対して垂直な方向から見た場合に交互
の位置となるようにした。この場合、最も近い位置にあ
る表面の線状電極と裏面の線状電極との距離は約９ｍｍ
であった。得られた荷電式フィルタの気体流出面側の電
極をアースして接地電極とし、気体流入面側の電極を高
圧電源と接続して高圧電極とし、荷電する電圧を変え
て、各印加電圧における荷電式フィルタの捕集効率を測
定した。測定には大気塵を使用し、風速１０ｃｍ／秒の
条件でフィルタに通過させ、通過前後での粒径０．３〜
０．５μｍの塵埃の粒子数をパーティクルカウンターに
よって測定して捕集効率を求めた。その結果を表３に示
す。Example 6 A hydroentangled nonwoven fabric having a basis weight of 66 g / m 2 and a thickness of 0.45 mm was prepared by subjecting a fiber web made of polyester fiber having a fineness of 1.5 denier to hydroentangling treatment. Copper-nickel plating (adhesion weight 28 g / m
2 ) was applied to obtain an electrode material having a volume resistance of 3 × 10 −3 Ω · cm. On the other hand, rayon fiber 10 with a fineness of 1.5 denier
A dense layer having a basis weight of 70 g / m 2 consisting of 0% by weight and a fineness of 1.
65 g / m 2 basis weight of 70% by weight of 5 denier rayon fiber, 20% by weight of 3 denier polyester fiber and 10% by weight of 5 denier polyester fiber
And a coarse layer having a basis weight of 50 g / m 2 comprising 40% by weight of rayon fiber having a fineness of 1.5 denier, 40% by weight of polyester fiber having a fineness of 3 denier and 20% by weight of polyester fiber having a fineness of 5 denier. Then, after needle punching, an acrylic resin emulsion (solid content 90 g / m 2 ) is applied and dried to form a filter material consisting of a non-woven fabric with a three-layer structure and a basis weight of 275 g / m 2 and a thickness of 3 mm. did. On the surface of the above-mentioned filter material that is the gas inflow side, the above-mentioned hydroentangled nonwoven fabric is cut into a comb shape as shown in FIG. 1, and the electrode material is pasted with an acrylic resin adhesive, Thickness of 2 on the surface that is the gas outflow side
An electrode material made of 0 μm aluminum foil, which was cut into a comb shape as shown in FIG. 1, was attached with an acrylic resin adhesive to obtain a charge-type filter. The width of the linear electrodes is 2 mm, and the distance between the adjacent linear electrodes is about 1 mm.
It was set to 9 mm. Further, as shown in FIG. 1, the linear electrodes on the front and back surfaces are arranged at alternate positions when viewed from a direction perpendicular to the surface of the filter medium. In this case, the distance between the closest linear electrode on the front surface and the linear electrode on the rear surface is about 9 mm.
Met. The electrode on the gas outflow side of the obtained charge-type filter is grounded to serve as a ground electrode, and the electrode on the gas inflow side is connected to a high-voltage power supply to serve as a high-voltage electrode. The collection efficiency of the formula filter was measured. Atmospheric dust was used for the measurement, and it was passed through a filter under the condition of a wind speed of 10 cm / sec.
The collection efficiency was obtained by measuring the number of particles of 0.5 μm dust with a particle counter. Table 3 shows the results.
【００３６】実施例７ 実施例６で用いた水流絡合不織布に銅−ニッケルメッキ
した電極素材を両表面に用いたこと以外は、実施例６と
同様にして荷電式フィルタを得た。得られた荷電式フィ
ルタの各印加電圧下における捕集効率を実施例６と同様
にして測定し、表３に示した。Example 7 A charged filter was obtained in the same manner as in Example 6 except that the hydroentangled non-woven fabric used in Example 6 had copper-nickel plated electrode material on both surfaces. The collection efficiency of the obtained charge-type filter under each applied voltage was measured in the same manner as in Example 6, and is shown in Table 3.
【００３７】[0037]
【表３】 [Table 3]
【００３８】表３から明らかなように、処理風速１０ｃ
ｍ／秒の条件下において、実施例６、７の荷電式フィル
タはいずれも印加電圧−５ＫＶにおいて９０％を超える
高い捕集効率を示した。とくに、実施例６の荷電式フィ
ルタでは印加電圧−４ＫＶにおいて既に捕集効率が９０
％を超えており、より絶対値の小さな印加電圧で優れた
捕集効率を示した。As is clear from Table 3, the processing wind speed is 10c.
Under the condition of m / sec, the charged filters of Examples 6 and 7 both showed high collection efficiency exceeding 90% at an applied voltage of -5 KV. Particularly, in the charge type filter of the sixth embodiment, the trapping efficiency is already 90 at the applied voltage of -4 KV.
%, The collection efficiency was excellent at an applied voltage with a smaller absolute value.
【００３９】[0039]
【発明の効果】本発明の荷電式フィルタでは、導電性を
有する繊維の端面が多数表面に露出した素材から形成さ
れる線状または帯状の電極を濾材表面に間隔をあけて配
置しているので、低い電圧で塵埃を効率よく捕集するこ
とを可能にすると共に、電極間の火花放電による濾材の
発火を防止できる。また、本発明の荷電式フィルタは、
電極に上記フィルム又は不織布をベースとする素材を用
いるため、プリーツ加工が行いやすく、断線のおそれが
ない。In the charge-type filter of the present invention, linear or strip electrodes made of a material in which a large number of conductive fiber end surfaces are exposed on the surface are arranged on the surface of the filter medium at intervals. It is possible to efficiently collect dust at a low voltage and prevent ignition of the filter medium due to spark discharge between the electrodes. Further, the charge-type filter of the present invention,
Since the material based on the above film or nonwoven fabric is used for the electrode, pleating is easy and there is no risk of disconnection.
【００４０】とくに、濾材の気体流入側の表面に、導電
性を有する繊維の端面が表面に露出した電極素材からな
る線状または帯状の電極を配置した場合、より低い電圧
で高い捕集効率を期待できる。In particular, when a linear or strip electrode made of an electrode material in which the end face of the conductive fiber is exposed on the surface is arranged on the surface of the filter medium on the gas inflow side, a high collection efficiency can be obtained at a lower voltage. Can be expected.
【００４１】また、濾材表面に設けられた線状または帯
状の電極からなる接地電極と高圧電極とを、濾材表面に
対して垂直な方向から見た場合に交互となるように配置
すれば、塵埃を濾材全体に分散して捕集することが可能
となるため濾材の寿命をより長くすることができる。If the ground electrode and the high-voltage electrode, which are linear or strip-shaped electrodes provided on the surface of the filter medium, are arranged alternately when viewed from the direction perpendicular to the surface of the filter medium, dust will be generated. Since it is possible to disperse and collect in the whole filter medium, the life of the filter medium can be extended.
【００４２】なお、電極素材として導電性繊維を有する
短繊維を導電性フィルムに接着したシートを用いる場
合、導電性フィルムに単に導電性繊維を有する短繊維を
付着させるだけで製作できるので製造が簡便であり、し
かも、導電性短繊維の両端面が多数表面に露出するた
め、低い印加電圧で高い捕集効率を得ることが可能にな
る。When a sheet obtained by adhering a short fiber having a conductive fiber to a conductive film is used as an electrode material, it can be manufactured simply by adhering the short fiber having a conductive fiber to the conductive film. Moreover, since both end surfaces of the conductive short fibers are exposed on the surface, it is possible to obtain a high collection efficiency with a low applied voltage.
【図１】本発明の荷電式フィルタの一例を示す斜視図。FIG. 1 is a perspective view showing an example of a charge-type filter of the present invention.
【図２】本発明の荷電式フィルタの一例の部分拡大断面
模型図。FIG. 2 is a partially enlarged cross-sectional model view of an example of the charge-type filter of the present invention.
【図３】本発明の荷電式フィルタの他の例の部分拡大断
面模型図。FIG. 3 is a partially enlarged cross-sectional model view of another example of the charge-type filter of the present invention.
【図４】本発明の荷電式フィルタに使用する導電性を有
する繊維の端面が表面に露出した素材から形成される電
極の一例を示す部分拡大図。FIG. 4 is a partially enlarged view showing an example of an electrode formed of a material in which end faces of electrically conductive fibers used in the charge-type filter of the present invention are exposed on the surface.
１・・・濾材 ２・・・導電性を有する繊維の端面が表面に露出した電
極素材からなる線状電極 ３・・・アルミニウム箔からなる線状電極DESCRIPTION OF SYMBOLS 1 ... Filter material 2 ... Linear electrode made of an electrode material in which end faces of electrically conductive fibers are exposed on the surface 3 ... Linear electrode made of aluminum foil
Claims (7)
けられており、該濾材の一方表面に設けられた電極を高
圧電極、他方表面に設けられた電極を接地電極とした荷
電式フィルタにおいて、高圧電極または接地電極の少な
くとも一方を導電性を有する繊維の端面が表面に露出し
た素材から形成したことを特徴とする荷電式フィルタ。1. A charge-type filter in which a linear or strip-shaped electrode is provided on the surface of a filter medium, an electrode provided on one surface of the filter medium is a high-voltage electrode, and an electrode provided on the other surface is a ground electrode. 2. A charge-type filter according to claim 1, wherein at least one of the high-voltage electrode and the ground electrode is formed of a material in which an end face of a conductive fiber is exposed on the surface.
繊維の端面が表面に露出した素材からなる電極を配置し
たことを特徴とする請求項１に記載の荷電式フィルタ。2. The charge-type filter according to claim 1, wherein an electrode made of a material in which an end face of a conductive fiber is exposed on the surface is arranged on the gas inflow side surface of the filter medium.
て垂直な方向から透過して見た場合に交互に配置されて
いることを特徴とする請求項１に記載の荷電式フィル
タ。3. The charge-type filter according to claim 1, wherein the high-voltage electrodes and the ground electrodes are alternately arranged when seen from a direction perpendicular to the surface of the filter medium.
した素材が、導電性を有する短繊維を導電性フィルムに
接着したシートであることを特徴とする請求項１に記載
の荷電式フィルタ。4. The charge-type filter according to claim 1, wherein the material in which the end faces of the electrically conductive fibers are exposed on the surface is a sheet in which electrically conductive short fibers are adhered to an electrically conductive film. .
した素材が、導電性を有する短繊維を導電性線材に接着
した導電性ワイヤーであることを特徴とする請求項１に
記載の荷電式フィルタ。5. The charging according to claim 1, wherein the material having the end faces of the electrically conductive fibers exposed on the surface is an electrically conductive wire in which electrically conductive short fibers are bonded to an electrically conductive wire. Expression filter.
した素材が、短繊維を機械的に絡合した不織布に導電性
物質を付着せしめた導電性不織布であることを特徴とす
る請求項１に記載の荷電式フィルタ。6. The material in which the end face of the conductive fiber is exposed on the surface is a conductive non-woven fabric obtained by adhering a conductive substance to a non-woven fabric in which short fibers are mechanically entangled. 1. The charge-type filter according to 1.
した素材が、導電性を有する短繊維が機械的に絡合され
た導電性不織布であることを特徴とする請求項１に記載
の荷電式フィルタ。7. The material according to claim 1, wherein the material in which the end faces of the electrically conductive fibers are exposed on the surface is an electrically conductive nonwoven fabric in which electrically conductive short fibers are mechanically entangled. Charged filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19294994A JP3445372B2 (en) | 1994-07-25 | 1994-07-25 | Charged filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19294994A JP3445372B2 (en) | 1994-07-25 | 1994-07-25 | Charged filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0833856A true JPH0833856A (en) | 1996-02-06 |
| JP3445372B2 JP3445372B2 (en) | 2003-09-08 |
Family
ID=16299702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19294994A Expired - Fee Related JP3445372B2 (en) | 1994-07-25 | 1994-07-25 | Charged filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3445372B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09245933A (en) * | 1996-03-04 | 1997-09-19 | Kazumasa Suzaki | Disposable negative-ion generating air cleaning unit and its mounting method |
| JP2001170519A (en) * | 1999-12-16 | 2001-06-26 | Japan Vilene Co Ltd | Dust collecting sheet for electric precipitator and electric precipitator using the same |
| JP2001324422A (en) * | 2000-05-12 | 2001-11-22 | Natl Inst Of Advanced Industrial Science & Technology Meti | Pm-sampling measuring device using metal mesh filter and voltage impression |
| JP2005161302A (en) * | 2003-08-25 | 2005-06-23 | Delphi Technologies Inc | Portable air filtration system |
| JP2006525113A (en) * | 2003-04-30 | 2006-11-09 | ヌトソス、ミカエル | Conductive gas purification filter and filter assembly |
| JP2017051936A (en) * | 2015-09-11 | 2017-03-16 | パナソニックＩｐマネジメント株式会社 | Filtering medium and air cleaner |
| JP2018112489A (en) * | 2017-01-12 | 2018-07-19 | 国立研究開発法人産業技術総合研究所 | Pressure sensor, method for manufacturing pressure sensor, bed device, and sheet for vehicle |
| US10168059B2 (en) | 2015-09-11 | 2019-01-01 | Panasonic Intellectual Property Management Co., Ltd. | Filtering medium and air purifier |
| WO2019151790A1 (en) * | 2018-02-05 | 2019-08-08 | 엘지전자 주식회사 | Electric dust collecting filter and electric dust collecting device comprising same |
| KR20200097957A (en) * | 2019-02-11 | 2020-08-20 | 연세대학교 산학협력단 | Dry washing type electric dust collector |
-
1994
- 1994-07-25 JP JP19294994A patent/JP3445372B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09245933A (en) * | 1996-03-04 | 1997-09-19 | Kazumasa Suzaki | Disposable negative-ion generating air cleaning unit and its mounting method |
| JP2001170519A (en) * | 1999-12-16 | 2001-06-26 | Japan Vilene Co Ltd | Dust collecting sheet for electric precipitator and electric precipitator using the same |
| JP2001324422A (en) * | 2000-05-12 | 2001-11-22 | Natl Inst Of Advanced Industrial Science & Technology Meti | Pm-sampling measuring device using metal mesh filter and voltage impression |
| JP2006525113A (en) * | 2003-04-30 | 2006-11-09 | ヌトソス、ミカエル | Conductive gas purification filter and filter assembly |
| JP2005161302A (en) * | 2003-08-25 | 2005-06-23 | Delphi Technologies Inc | Portable air filtration system |
| JP2017051936A (en) * | 2015-09-11 | 2017-03-16 | パナソニックＩｐマネジメント株式会社 | Filtering medium and air cleaner |
| US10168059B2 (en) | 2015-09-11 | 2019-01-01 | Panasonic Intellectual Property Management Co., Ltd. | Filtering medium and air purifier |
| JP2018112489A (en) * | 2017-01-12 | 2018-07-19 | 国立研究開発法人産業技術総合研究所 | Pressure sensor, method for manufacturing pressure sensor, bed device, and sheet for vehicle |
| WO2019151790A1 (en) * | 2018-02-05 | 2019-08-08 | 엘지전자 주식회사 | Electric dust collecting filter and electric dust collecting device comprising same |
| KR20190094604A (en) * | 2018-02-05 | 2019-08-14 | 엘지전자 주식회사 | Electric dust collecting filter and electric dust collecting apparatus comprising the same |
| US11040355B2 (en) | 2018-02-05 | 2021-06-22 | Lg Electronics Inc. | Electric dust collecting filter and electric dust collecting device comprising same |
| KR20200097957A (en) * | 2019-02-11 | 2020-08-20 | 연세대학교 산학협력단 | Dry washing type electric dust collector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3445372B2 (en) | 2003-09-08 |
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