JPH07213831A - Antistatic filter element and its production - Google Patents
Antistatic filter element and its productionInfo
- Publication number
- JPH07213831A JPH07213831A JP2592894A JP2592894A JPH07213831A JP H07213831 A JPH07213831 A JP H07213831A JP 2592894 A JP2592894 A JP 2592894A JP 2592894 A JP2592894 A JP 2592894A JP H07213831 A JPH07213831 A JP H07213831A
- Authority
- JP
- Japan
- Prior art keywords
- filter element
- antistatic
- porous
- thin layer
- porous 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)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、粉体、特に帯電した粉
体を捕集する集塵機または回収する回収装置に適用する
帯電防止型フィルタエレメントに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antistatic filter element applied to a dust collector for collecting powder, particularly a charged powder, or a recovery device for recovering the powder.
【０００２】[0002]
【従来の技術】帯電し易い粉体、特に帯電した粉体を捕
集する集塵機または回収する回収装置に適用するフィル
タエレメントは、フィルタエレメント自身が粉末と同種
の電荷を有していては捕集または回収することはできな
いので、フィルタエレメントには帯電防止処理がなされ
ている。例えば、バグフィルタ（繊維濾布）を使用した
フィルタエレメントでは、バグフィルタ中に金属製繊維
を織り込んだ繊維濾布とするか、または濾布に一定間隔
で導電性糸で縫目を入れた繊維濾布とすることにより帯
電防止型フィルタエレメントとする方法が採られてい
る。樹脂粒子を焼結してなる連続気泡多孔性フィルタエ
レメントでは、従来以下に示すような帯電防止方法が採
られている。 １．金属やカーボン等の導電性物質の繊維や粉体を、フ
ィルタエレメントの原料樹脂と混合し、粉砕する等して
造粒し、該樹脂粒子を焼結成形して帯電防止型（連続気
泡多孔性）フィルタエレメントとする方法。 ２．予め原料樹脂中に導電性物質を混練して電気抵抗を
下げた樹脂を製造し、電気抵抗を下げた樹脂を粉砕処理
して粒状体とし、焼結して帯電防止型（連続気泡多孔
性）フィルタエレメントとする方法。2. Description of the Related Art A filter element applied to a dust collector or a collecting device for collecting powder which is easily charged, especially charged powder, does not collect if it has the same electric charge as the powder. Alternatively, since it cannot be collected, the filter element is subjected to an antistatic treatment. For example, in the case of a filter element using a bag filter (fiber filter cloth), a fiber filter cloth in which metal fibers are woven in the bag filter, or a fiber in which the filter cloth is stitched with conductive threads at regular intervals is used. A method of forming an antistatic filter element by using a filter cloth is adopted. In the open-cell porous filter element formed by sintering resin particles, the following antistatic method has been conventionally used. 1. Fibers and powders of electrically conductive substances such as metal and carbon are mixed with the raw material resin of the filter element, pulverized and granulated, and the resin particles are sintered and molded to form an antistatic type (open cell porosity ) How to make a filter element. 2. An electrically conductive material is kneaded in advance with a raw material resin to produce a resin with reduced electrical resistance, and the resin with reduced electrical resistance is crushed into granules and sintered to form an antistatic type (open-cell porosity). How to make a filter element.
【０００３】[0003]
【発明が解決しようとする課題】前記帯電防止方法が採
られた場合、以下に示すような問題点が生じる。 予め原料樹脂中に導電性物質を混練した樹脂粒子を
原料として、連続気泡多孔性フィルタエレメントを焼結
・成形すると、混練した異種物質が樹脂間の接触を弱
め、焼結・成形したフィルタエレメントの機械的強度が
低下する。 金属やカーボン等の導電性物質を樹脂粒子と混合
し、焼結成形したフィルタエレメントの機械的強度も異
種物質の混合のため低下する。フィルタエレメントは、
捕集した粉体を除去する等の操作をするので、多孔性構
造のフィルタエレメントの機械的強度低下は、多孔性構
造の破壊による構成樹脂の脱落などを起こしフィルタエ
レメントとしての機能を損なうという問題点が生じる。
また、フィルタエレメントの機械的強度低下には許容範
囲があるにしても、 異種物質の混練や混合には、付加的な作業や装置を
必要とするため生産性を低下させる。 非帯電防止型フィルタエレメントの製造と帯電防止
型フィルタエレメントの製造では原料の状態が異なるた
め、焼結等の製造条件や作業条件を変える必要があり生
産性が低下する。さらにまた、混練あるいは混合する導
電性物質の量による電気抵抗率の変化及び焼結・成形し
たフィルタエレメントの機械的強度の変化の間の関係は
非線形的関係にあるため、僅かな導電性物質の量の変化
により、以下のような問題が生じる。 帯電防止能が十分発揮されない。 急激な機械的強度低下が起こる。 等であり、製品は合格しないので製品歩留りは低下す
る。When the above antistatic method is adopted, the following problems occur. When the open-cell porous filter element is sintered and molded using resin particles obtained by previously kneading a conductive material in the raw material resin, the kneaded foreign material weakens the contact between the resins and Mechanical strength is reduced. The mechanical strength of a filter element formed by mixing a conductive material such as metal or carbon with resin particles and sinter molding also decreases due to the mixing of different materials. The filter element is
Since the collected powder is removed and other operations are performed, the mechanical strength of the filter element with a porous structure is reduced, causing the resin component to fall off due to the destruction of the porous structure, impairing the function of the filter element. Dots occur.
Further, even if the mechanical strength of the filter element can be lowered, the kneading and mixing of different substances requires additional work and equipment, which lowers the productivity. Since the state of the raw material is different between the manufacture of the antistatic filter element and the manufacture of the antistatic filter element, it is necessary to change the manufacturing conditions such as sintering and the working conditions, which lowers the productivity. Furthermore, since there is a non-linear relationship between the change in the electrical resistivity depending on the amount of the conductive material to be kneaded or mixed and the change in the mechanical strength of the sintered / formed filter element, a slight amount of the conductive material The change in the amount causes the following problems. Antistatic ability is not fully exerted. A sudden decrease in mechanical strength occurs. Since the product does not pass, the product yield decreases.
【０００４】また、フィルタエレメントには、優れた集
塵能力、帯電性の塵を集塵する能力と同時に、さらに捕
集した粉体を再び払い落として回収する優れた回収機能
を持つことが求められる。フィルタエレメントが優れた
集塵能力同時に優れた回収機能を持つためには多孔性の
フィルタエレメントにその表面から粉体が剥離し易い性
質を持つことが必要である。Further, the filter element is required to have an excellent dust collecting ability and an ability to collect electrostatically charged dust, and at the same time, have an excellent collecting function of further scraping and collecting the collected powder. To be In order for the filter element to have an excellent dust collecting ability and an excellent recovery function at the same time, it is necessary for the porous filter element to have a property that powder easily separates from the surface thereof.
【０００５】本発明の目的は、従来技術の前記問題点を
解決し、均一で、優れた帯電防止能を有する帯電防止型
フィルタエレメントと機械的強度低下を起こさず、再現
性のある安定した帯電防止処理が生産性良く実現できる
帯電防止型フィルタエレメント及びその製造方法を提供
することにある。さらに本発明の目的は、優れた集塵能
力、帯電性の塵を集塵する能力を持ち、かつ捕集した粉
体を容易に回収できる帯電防止型フィルタエレメントと
その製造方法を提供することにある。An object of the present invention is to solve the above-mentioned problems of the prior art, to provide a uniform and antistatic filter element having an excellent antistatic ability and a reproducible and stable charging without causing mechanical strength reduction. It is an object of the present invention to provide an antistatic filter element and a method for manufacturing the same, which can realize the prevention treatment with high productivity. Further, an object of the present invention is to provide an antistatic filter element having an excellent dust collecting ability and an ability to collect electrostatically charged dust, and capable of easily collecting the collected powder, and a manufacturing method thereof. is there.
【０００６】[0006]
【課題を解決するための手段】上記課題は、本発明の帯
電防止型フィルタエレメント及びその製造方法により達
成される。すなわち、本発明の帯電防止型フィルタエレ
メントは、 １）表面から多孔性フィルタエレメント本体中に浸透・
結着した導電性物質の薄層を有し、表面の電気抵抗率が
１０9 Ω／sq以下で、かつ非帯電防止型と同等の圧力損
失値を有することを特徴とする帯電防止型フィルタエレ
メントであり、好ましくは、 ２）多孔性フィルタエレメントの表面に多孔性薄層のフ
ッ素樹脂層を有し、続いて該フッ素樹脂層の下に結着し
た導電性物質の薄層を有し、表面の電気抵抗率が１０9
Ω／sq以下で、かつ非帯電防止型と同等の圧力損失値を
有することを特徴とする帯電防止型フィルタエレメント
である。また、本発明の帯電防止型フィルタエレメント
の製造方法は、 ３）樹脂粒子を焼結してなる連続気泡多孔性フィルタエ
レメントの表面に、前記多孔性フィルタエレメントの平
均孔径の１／１００〜１／１０００の粒径の導電性物質
よりなる微粒子を結着物質溶液中に懸濁した懸濁液とし
て塗布・乾燥し、前記多孔性フィルタエレメントの表面
付近に浸透した多孔性の導電性薄層を設けて表面の電気
抵抗率を１０9 Ω／sq以下にし、かつ該帯電防止処理後
の前記多孔性フィルタエレメントの圧力損失を処理前の
値に維持することを特徴とする帯電防止型フィルタエレ
メントの製造方法であり、好ましくは、 ４）表面付近に前記多孔性の導電性薄層を有する前記多
孔性フィルタエレメントの上にフッ素樹脂粉末を塗設し
たことを特徴とする前記３）記載の帯電防止型フィルタ
エレメントの製造方法である。 なお前記１）〜４）において、多孔性フィルタエレメン
トの「表面」など、「表面」というのは多孔性フィルタ
エレメントの両面の表面のことである。The above object can be achieved by the antistatic filter element of the present invention and the manufacturing method thereof. That is, the antistatic filter element of the present invention comprises: 1) Permeation from the surface into the porous filter element body.
An antistatic filter element having a thin layer of a conductive substance bound thereto, having an electric resistivity of 10 9 Ω / sq or less on the surface and having a pressure loss value equivalent to that of an antistatic type. And preferably 2) having a thin porous fluororesin layer on the surface of the porous filter element, and then having a thin layer of conductive material bound below the fluororesin layer, Has an electrical resistivity of 10 9
An antistatic filter element characterized by having a pressure loss value of Ω / sq or less and equivalent to that of a non-static type. In addition, the method for producing an antistatic filter element of the present invention is 3) 1/100 to 1/1 / the average pore diameter of the porous filter element on the surface of the open-cell porous filter element formed by sintering resin particles. Fine particles of a conductive substance having a particle diameter of 1000 are applied as a suspension in a binder solution and dried to provide a porous conductive thin layer that has penetrated near the surface of the porous filter element. And an electric resistance of the surface of the porous filter element is maintained at 10 9 Ω / sq or less and the pressure loss of the porous filter element after the antistatic treatment is maintained at the value before the treatment. Preferably, 4) a fluororesin powder is coated on the porous filter element having the porous conductive thin layer in the vicinity of the surface. A method for producing antistatic filter element according. In the above 1) to 4), “surface” such as “surface” of the porous filter element means surfaces on both sides of the porous filter element.
【０００７】樹脂粒子１を焼結してなる非帯電防止型連
続気泡多孔性フィルタエレメントの断面図を図３に示し
た。フィルタエレメントの表面粗さは、表面に深さ１０
〜２５０μｍの凹凸を有する状態である。また、該フィ
ルタエレメントの有する平均孔径は１０〜５０μｍであ
る。非帯電防止型連続気泡多孔性フィルタエレメントの
表面の電気的表面抵抗率は１０16Ω／sqであり、機械的
強度は第１表に示す通り耐熱７０℃型では０．４〜０．
５ｋｇｆ／ｍｍ2 、１６０℃型では１．０〜１．２ｋｇ
ｆ／ｍｍ2 である。本発明に使用する樹脂粒子の材質
は、用途目的により要求される耐熱性等によって異な
り、ポリエチレン樹脂、ポリプロピレン樹脂あるいはポ
リスルフォン樹脂等であり適宜選択して使用する。A cross-sectional view of an antistatic type open-cell porous filter element obtained by sintering resin particles 1 is shown in FIG. The surface roughness of the filter element has a depth of 10
It is a state having irregularities of up to 250 μm. The average pore size of the filter element is 10 to 50 μm. The electrical surface resistivity of the surface of the non-static type open-cell porous filter element is 10 16 Ω / sq, and the mechanical strength is 0.4-0.
5 kgf / mm 2, in 160 ° C. type 1.0~1.2kg
f / mm 2 . The material of the resin particles used in the present invention varies depending on the heat resistance and the like required depending on the purpose of use, and is polyethylene resin, polypropylene resin, polysulfone resin or the like, and is appropriately selected and used.
【０００８】[0008]
【表１】 [Table 1]
【０００９】本発明において帯電防止処理に使用する導
電性物質を例示すれば、カーボンブラック粉体及び銀、
銅、アルミニウム等の各種金属粉体の他粉体状に粉砕さ
れたカーボン短繊維等が挙げられる。少量で帯電防止能
を付与するといわれるケッチェンブラック等に相当する
カーボンブラックは好適な１例である。これら粉体の粒
径は多孔性フィルタエレメントの平均孔径の１／２００
〜１／１０００の粒径が好ましい。これら粉体は液体中
に懸濁した懸濁液として非帯電防止型連続気泡多孔性フ
ィルタエレメントの表面に塗布する。懸濁液の分散媒体
は水が好ましいが、塗布に際してフィルタエレメントの
表面に対する濡れ適性及び内部への浸透適性から、少量
の水溶性の有機溶剤または極少量の界面活性剤を水に混
合しておくことが望ましい。また、これら粉体と共に分
散して、粉体の水中における分散性を安定化すると共
に、多孔性フィルタエレメント表面に塗布・乾燥した時
フィルタエレメント表面に良く結着することをたすける
結着物質を懸濁液中に共存させておくことが望ましい。Examples of the conductive material used in the antistatic treatment in the present invention include carbon black powder and silver,
In addition to various metal powders such as copper and aluminum, short carbon fibers pulverized into powder form can be used. Carbon black corresponding to Ketjen black, which is said to impart antistatic ability even in a small amount, is a preferable example. The particle size of these powders is 1/200 of the average pore size of the porous filter element.
Particle sizes of up to 1/1000 are preferred. These powders are applied as a suspension in a liquid to the surface of an antistatic open cell porous filter element. Water is preferably used as the dispersion medium of the suspension, but a small amount of a water-soluble organic solvent or a very small amount of a surfactant is mixed with water in view of its wettability with respect to the surface of the filter element and its suitability for permeation into the inside during application. Is desirable. In addition, it is dispersed together with these powders to stabilize the dispersibility of the powders in water, and to suspend a binding substance that helps to bind well to the filter element surface when applied and dried on the porous filter element surface. It is desirable to coexist in the suspension.
【００１０】懸濁液中に共存させておく結着物質は、分
散媒に溶解ないし安定に分散するものが良い。好ましく
は物結着物質の共存によって前記カーボンブラック粉体
等の導電性物質の粉体の分散が安定化するものが望まし
い。例えばポリエチレン樹脂を母体とする多孔性フィル
タエレメントの表面に塗布し、結着させる懸濁液の場合
には、例えばエチレン−アクリル酸共重合体あるいはエ
チレン−アクリル酸ブロック共重合体を結着物質として
使用し、エチレン−アクリル酸共重合体の水溶液中に前
記カーボンブラック粉体を分散した懸濁液とする。また
は、エチレン−アクリル酸ブロック共重合体と前記カー
ボンブラック粉体を予め混練し、粉砕して導電性微細粉
体とし、水中に分散して懸濁液とする方法も良い。ここ
に例示した共存結着物質は１例であり、本発明はこの例
示によって制限されることはなく、種々の結着物質およ
びそれらを用いた懸濁液を調製することができる。The binding substance that is allowed to coexist in the suspension is preferably one that is dissolved or stably dispersed in the dispersion medium. It is desirable that the dispersion of the powder of the conductive material such as the carbon black powder is stabilized by the coexistence of the binding material. For example, in the case of a suspension in which polyethylene resin is applied to the surface of a porous filter element as a matrix and is bound, for example, ethylene-acrylic acid copolymer or ethylene-acrylic acid block copolymer is used as the binding substance. It is used as a suspension in which the carbon black powder is dispersed in an aqueous solution of ethylene-acrylic acid copolymer. Alternatively, a method may be used in which the ethylene-acrylic acid block copolymer and the carbon black powder are previously kneaded, pulverized into a conductive fine powder, and dispersed in water to form a suspension. The coexisting binding substance exemplified here is one example, and the present invention is not limited by this exemplification, and various binding substances and suspensions using them can be prepared.
【００１１】懸濁液中の分散体の粒径は結着物質を共存
させても大きく変化することはなく、多孔性フィルタエ
レメントの表面に塗布乾燥し結着させた後も多孔性フィ
ルタエレメントの圧力損失を処理前の値に維持できる。
前記懸濁液中のカーボンブラック等導電性粉体と結着物
質との混合比は導電性粉体が２０〜８０容積％である。
好ましくは５０〜７５容積％である。結着物質が共存さ
せても多孔性フィルタエレメントの表面の電気抵抗率は
１０9 Ω／sq以下に維持できる。本発明において、前記
多孔性フィルタエレメントの表面に前記懸濁液を塗布す
る方法は、スプレーコーティング、刷毛塗り法、流延法
や浸漬法等種々の方法を使用でき、特に限定されない。The particle size of the dispersion in the suspension does not change significantly even if a binding substance is coexistent, and even after coating and drying on the surface of the porous filter element to bind the porous filter element to the porous filter element. The pressure loss can be maintained at the value before processing.
The mixing ratio of the conductive powder such as carbon black and the binder in the suspension is 20 to 80% by volume of the conductive powder.
It is preferably 50 to 75% by volume. Even if the binding substance is allowed to coexist, the electric resistivity of the surface of the porous filter element can be maintained at 10 9 Ω / sq or less. In the present invention, various methods such as a spray coating method, a brush coating method, a casting method and a dipping method can be used as the method for applying the suspension to the surface of the porous filter element, and the method is not particularly limited.
【００１２】前記導電性物質あるいは結着剤共存の微粉
末を前記多孔性フィルタエレメントの表面に懸濁液とし
て塗布し、乾燥・結着させた状態を図１に示した。図１
には多孔性フィルタエレメントの片側表面の付近を示し
ている。実際には多孔性フィルタエレメントの両面の表
面に塗布する。結着している導電性粉体あるいは導電性
粉体と結着物質との混合粉体の平均粒径は多孔性フィル
タエレメントの平均孔径の１／１００以下の粒径であ
り、結着している導電性薄層２の厚さは数μｍであり、
フィルタエレメント表面は多孔性を保っている。FIG. 1 shows a state in which the conductive material or a fine powder coexisting with a binder is applied to the surface of the porous filter element as a suspension, dried and bound. Figure 1
Shows the vicinity of one surface of the porous filter element. In practice, it is applied to both surfaces of the porous filter element. The average particle size of the conductive powder that is bound or the mixed powder of the conductive powder and the binding substance is 1/100 or less of the average pore size of the porous filter element. The thickness of the conductive thin layer 2 is several μm,
The surface of the filter element remains porous.
【００１３】前記帯電防止処理を施したフィルタエレメ
ントは、優れた集塵能力や粉体回収能力を持ち、かつ捕
集した粉体を払落とすことができる剥離性を備えている
が、さらに一段と剥離性能を強化することが望まれる。
この目的のために、フッ素樹脂微粉末を水または有機溶
剤中に分散させて懸濁液とし、該懸濁液を帯電防止型連
続気泡多孔性フィルタエレメントの表面に塗布する。塗
布したフッ素樹脂微粉末をフィルタエレメントの表面に
強固に結着することは、例えば塗布・乾燥したフッ素樹
脂微粉末層を加熱溶融して行うことができる。また、水
または有機溶剤中にフッ素樹脂微粉末と共に前記結着物
質微粉末を分散して結着を強化することができる。塗布
するフッ素樹脂層は、連続気泡を形成している多孔性フ
ィルタエレメントの孔の表面を薄く、かつ予め帯電防止
されている表面の導電性が失われない程度に、部分的に
覆うように設ける。帯電防止型連続気泡多孔性フィルタ
エレメントの表面にフッ素樹脂微粉末を水または有機溶
剤中に分散させた懸濁液として塗布・乾燥し、剥離性強
化層３を設けた状態を図２に示した。剥離性能を強化す
るためにフィルタエレメントの表面に塗布するフッ素樹
脂としては、テトラフルオロエチレン、テトラフルオロ
エチレン・パーフルオロアルキルビニルエーテル共重合
体の溶融性フッ素樹脂、フルオロオレフィン・炭化水素
系ビニルエーテル共重合体のような溶剤可溶性常温硬化
型フッ素樹脂等を挙げることができる。The antistatic-treated filter element has excellent dust collecting ability and powder collecting ability, and has a peeling property capable of removing the collected powder. It is desired to enhance performance.
For this purpose, the fluororesin fine powder is dispersed in water or an organic solvent to form a suspension, and the suspension is applied to the surface of the antistatic open-cell porous filter element. Firmly binding the applied fluororesin fine powder to the surface of the filter element can be performed, for example, by heating and melting the applied and dried fluororesin fine powder layer. In addition, the binding substance fine powder can be dispersed together with the fluororesin fine powder in water or an organic solvent to strengthen the binding. The fluororesin layer to be applied is provided so as to partially cover the surface of the pores of the porous filter element forming the open cells to the extent that the conductivity of the surface which is antistatic in advance is not lost. . FIG. 2 shows a state in which the fluororesin fine powder is applied on the surface of the antistatic open-cell porous filter element as a suspension prepared by dispersing fine fluororesin powder in water or an organic solvent, and is dried to form the peelable reinforcing layer 3. . The fluororesin applied to the surface of the filter element to enhance the peeling performance includes tetrafluoroethylene, a meltable fluororesin of tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, and a fluoroolefin / hydrocarbon vinyl ether copolymer. Solvent-soluble room temperature curing type fluororesins such as
【００１４】[0014]
【作用】本発明は、前記導電性物質の微粉体あるいは結
着剤共存の微粉体を懸濁液として前記多孔性フィルタエ
レメントの表面に塗布し、乾燥・結着させることにより
導電性薄層を該フィルタエレメントの表面に設け、該フ
ィルタエレメントの表面の電気抵抗率を１０9 Ω／sq以
下に維持することにより、帯電性の塵埃や粉体を集塵す
ることを可能としたものである。さらに本発明は、前記
帯電防止型連続気泡多孔性フィルタエレメントの表面に
前記フッ素樹脂の微粉体あるいは結着剤共存の微粉体を
懸濁液として塗布し、乾燥・結着させることにより、表
面の導電性が失われない程度に剥離性強化能のあるフッ
素樹脂層を設けて、捕集した粉体を払落とすことができ
る剥離性を強化したものである。本発明は、帯電防止性
能及び剥離性能の強化を、導電性物質や剥離性強化物質
を水または有機溶剤中に分散させた懸濁液として多孔性
フィルタエレメントの表面に塗布し、乾燥・結着させる
ことにより、導電性薄層及び剥離性薄層を設ける方法に
よって実現することにより、再現性良く、かつ多孔性フ
ィルタエレメントの機械的強度及び圧力損失を非処理多
孔性フィルタエレメントのそれら性能より劣化させるこ
となしに実現した技術である。According to the present invention, the conductive thin layer is formed by applying the fine powder of the conductive substance or the fine powder of the coexisting binder as a suspension to the surface of the porous filter element, and drying and binding. By being provided on the surface of the filter element and maintaining the electric resistivity of the surface of the filter element at 10 9 Ω / sq or less, electrostatic dust or powder can be collected. Furthermore, the present invention is to apply the fine powder of the fluororesin or the fine powder of the coexisting binder as a suspension to the surface of the antistatic open-cell porous filter element as a suspension, and to dry and bind the surface, A fluororesin layer having a peelability-enhancing ability to the extent that the conductivity is not lost is provided to enhance the peelability by which the collected powder can be removed. The present invention is applied to the surface of a porous filter element as a suspension in which a conductive substance or a peeling-strengthening substance is dispersed in water or an organic solvent to enhance antistatic performance and peeling performance, and then drying and binding. By providing a conductive thin layer and a peelable thin layer, the mechanical strength and pressure loss of the porous filter element are deteriorated with good reproducibility compared with those of the non-treated porous filter element. It is a technology that has been realized without letting go.
【００１５】[0015]
【実施例】前記、本発明の帯電防止型連続気泡多孔性フ
ィルタエレメントおよびそれを製造する方法の１例を以
下に実施例を示して説明する。しかし本発明は以下の実
施例によって制限されるものではない。EXAMPLES An example of the above-mentioned antistatic open-cell porous filter element of the present invention and a method for producing the same will be described below with reference to examples. However, the present invention is not limited to the examples below.
【００１６】実施例１ 蒸留水中に懸濁した、平均粒子径３０ｎｍのカーボンブ
ラック微粉体に、固形分配合割合が第２表に示した配合
割合で、酢酸ビニル系接着剤のラテックスを配合したカ
ーボンブラック懸濁水を、平均粒子径１５０μｍからな
るポリエチレン樹脂を用いて、平均孔径が５０μｍ、表
面の凹凸の高さが平均５０μｍの樹脂焼結連続気泡多孔
性フィルタエレメント（厚さ３．０ｍｍ）の両表面にス
プレーコーティングし、２４時間室温で乾燥して帯電防
止型フィルタエレメントを製造した。カーボンブラック
付着層（導電性物質薄層）の厚さは１．５ｍｍであっ
た。得られた帯電防止型フィルタエレメントの電気的表
面抵抗率及びろ過の圧力損失を帯電防止処理前の非帯電
防止型フィルタエレメントのそれらの値と共に第３表に
示した。Example 1 Carbon in which fine particles of carbon black having an average particle size of 30 nm were suspended in distilled water and a latex of vinyl acetate adhesive was blended at a blending ratio of solid content shown in Table 2 The black suspension water is made of polyethylene resin having an average particle diameter of 150 μm, and both of the resin-sintered open-cell porous filter elements (thickness: 3.0 mm) having an average pore diameter of 50 μm and a surface unevenness height of 50 μm on average are used. The surface was spray coated and dried at room temperature for 24 hours to produce an antistatic filter element. The thickness of the carbon black adhesion layer (conductive material thin layer) was 1.5 mm. The electric surface resistivity and the pressure loss of filtration of the obtained antistatic filter element are shown in Table 3 together with those values of the nonstatic filter element before the antistatic treatment.
【００１７】[0017]
【表２】 [Table 2]
【００１８】[0018]
【表３】 [Table 3]
【００１９】第３表より明らかなごとく、帯電防止型フ
ィルタエレメントの表面抵抗率は１０16Ω／sqから１０
8 Ω／sqに低下し、帯電防止能を有する。圧力損失は２
４ｍｍＡｑで帯電防止処理前後で変化はなかった。As is apparent from Table 3, the surface resistivity of the antistatic filter element is 10 16 Ω / sq to 10
8 Ω / sq and has antistatic ability. Pressure loss is 2
There was no change before and after the antistatic treatment at 4 mmAq.
【００２０】[0020]
【発明の効果】１．機械的強度を標準的な非帯電防止型
フィルタエレメントの値を保持したまま、帯電防止能を
付与することができる。 ２．製造にあたり、原料の混合あるいは混練のための作
業や設備が最小で良い。 ３．原料や調合作業の繰り返しによる品質や量上のバラ
ツキにより受ける帯電防止能の変化が著しく小さい。 ４．導電性物質薄層をフィルタエレメントの表面に設け
る方法で帯電防止能を付与するため、常に一定して安定
な表面抵抗率が得られる。 ５．帯電防止処理することによるろ過の圧力損失は起こ
らない。 ６．導電性物質薄層の上に、懸濁液を塗布してフッ素樹
脂薄層を設け、機械的強度及び帯電防止能に影響を与え
ることなく、捕集した粉体を払落とすことができる剥離
性を強化することができる。Effect of the Invention The antistatic ability can be imparted while maintaining the mechanical strength of the standard antistatic filter element. 2. In manufacturing, the work and equipment for mixing or kneading the raw materials may be minimal. 3. The change in antistatic ability caused by variations in quality and quantity due to repeated raw materials and compounding work is extremely small. 4. Since a thin layer of a conductive material is provided on the surface of the filter element to provide the antistatic ability, a constant and stable surface resistivity can always be obtained. 5. There is no pressure loss of filtration due to antistatic treatment. 6. A suspension is applied on a thin layer of conductive material to form a thin layer of fluororesin, and the collected powder can be removed without affecting the mechanical strength and antistatic ability. Can be strengthened.
【図１】連続気泡多孔性フィルタエレメントの表面に導
電性物質薄層を設けた状態を示す断面図である。FIG. 1 is a cross-sectional view showing a state in which a thin layer of a conductive substance is provided on the surface of an open-cell porous filter element.
【図２】帯電防止型連続気泡多孔性フィルタエレメント
の導電性物質薄層の上に剥離性強化薄層を設けた状態を
示す断面図である。FIG. 2 is a cross-sectional view showing a state in which a peelable reinforcing thin layer is provided on a conductive substance thin layer of an antistatic open-cell porous filter element.
【図３】連続気泡多孔性フィルタエレメントの断面図で
ある。FIG. 3 is a cross-sectional view of an open cell porous filter element.
１ 樹脂粒子 ２ 導電性物質薄層（カーボンブラック薄層） ３ 剥離性強化薄層（フッ素樹脂薄層） 1 Resin Particles 2 Conductive Material Thin Layer (Carbon Black Thin Layer) 3 Peeling Strengthening Thin Layer (Fluorocarbon Resin Thin Layer)
Claims (4)
中に浸透・結着した導電性物質の薄層を有し、表面の電
気抵抗率が１０9 Ω／sq以下で、かつ非帯電防止型フィ
ルタエレメントと同等の圧力損失値を有することを特徴
とする帯電防止型フィルタエレメント。1. A non-antistatic filter element having a thin layer of a conductive substance that permeates and binds into the porous filter element body from the surface and has an electric resistivity of 10 9 Ω / sq or less. An antistatic filter element having a pressure loss value equivalent to that of
性薄層のフッ素樹脂層を有し、続いて該フッ素樹脂層の
下に結着した導電性物質の薄層を有し、表面の電気抵抗
率が１０9 Ω／sq以下で、かつ非帯電防止型と同等の圧
力損失値を有することを特徴とする帯電防止型フィルタ
エレメント。2. The surface of the porous filter element has a porous thin fluororesin layer, and subsequently has a thin layer of a conductive substance bonded below the fluororesin layer, and has a surface electric resistance. An antistatic filter element having a rate of 10 9 Ω / sq or less and a pressure loss value equivalent to that of a nonstatic type.
フィルタエレメントの表面に、前記多孔性フィルタエレ
メントの平均孔径の１／１００〜１／１０００の粒径の
導電性物質よりなる微粒子を結着物質溶液中に懸濁した
懸濁液として塗布・乾燥し、前記多孔性フィルタエレメ
ントの表面付近に浸透した多孔性の導電性薄層を設けて
表面の電気抵抗率を１０9 Ω／sq以下にし、かつ該帯電
防止処理後の前記多孔性フィルタエレメントの圧力損失
を処理前の値に維持することを特徴とする帯電防止型フ
ィルタエレメントの製造方法。3. Fine particles of a conductive substance having a particle diameter of 1/100 to 1/1000 of the average pore diameter of the porous filter element are formed on the surface of the open-cell porous filter element formed by sintering resin particles. It is applied as a suspension suspended in a binder solution and dried, and a porous conductive thin layer is provided near the surface of the porous filter element to provide an electric resistance of the surface of 10 9 Ω / sq. The method for producing an antistatic filter element according to the following, wherein the pressure loss of the porous filter element after the antistatic treatment is maintained at the value before the treatment.
する多孔性フィルタエレメントの上にフッ素樹脂粉末を
塗設したことを特徴とする請求項３記載の帯電防止型フ
ィルタエレメントの製造方法。4. The method for producing an antistatic filter element according to claim 3, wherein fluororesin powder is applied on the porous filter element having the porous conductive thin layer near the surface. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02592894A JP3403481B2 (en) | 1994-01-31 | 1994-01-31 | Antistatic filter element and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02592894A JP3403481B2 (en) | 1994-01-31 | 1994-01-31 | Antistatic filter element and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07213831A true JPH07213831A (en) | 1995-08-15 |
| JP3403481B2 JP3403481B2 (en) | 2003-05-06 |
Family
ID=12179444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02592894A Expired - Fee Related JP3403481B2 (en) | 1994-01-31 | 1994-01-31 | Antistatic filter element and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3403481B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998024552A1 (en) * | 1996-12-06 | 1998-06-11 | Kimberly-Clark Worldwide, Inc. | Gas borne particulate filtration device and method of manufacturing thereof |
| DE10224878A1 (en) * | 2002-06-05 | 2004-01-08 | Pall Corporation | Filter insert and method for its production |
| CN114159887A (en) * | 2021-11-17 | 2022-03-11 | 安徽元琛环保科技股份有限公司 | Manufacturing method of intelligent filter bag and prepared intelligent temperature filter bag |
| CN114904332A (en) * | 2022-05-23 | 2022-08-16 | 安徽元琛环保科技股份有限公司 | Antistatic filter material and preparation method thereof |
-
1994
- 1994-01-31 JP JP02592894A patent/JP3403481B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998024552A1 (en) * | 1996-12-06 | 1998-06-11 | Kimberly-Clark Worldwide, Inc. | Gas borne particulate filtration device and method of manufacturing thereof |
| DE10224878A1 (en) * | 2002-06-05 | 2004-01-08 | Pall Corporation | Filter insert and method for its production |
| CN114159887A (en) * | 2021-11-17 | 2022-03-11 | 安徽元琛环保科技股份有限公司 | Manufacturing method of intelligent filter bag and prepared intelligent temperature filter bag |
| CN114904332A (en) * | 2022-05-23 | 2022-08-16 | 安徽元琛环保科技股份有限公司 | Antistatic filter material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3403481B2 (en) | 2003-05-06 |
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