JPS5925612B2 - electret filter - Google Patents
electret filterInfo
- Publication number
- JPS5925612B2 JPS5925612B2 JP8734479A JP8734479A JPS5925612B2 JP S5925612 B2 JPS5925612 B2 JP S5925612B2 JP 8734479 A JP8734479 A JP 8734479A JP 8734479 A JP8734479 A JP 8734479A JP S5925612 B2 JPS5925612 B2 JP S5925612B2
- Authority
- JP
- Japan
- Prior art keywords
- electret
- film
- pleats
- conductive sheet
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/28—Plant or installations without electricity supply, e.g. using electrets
Landscapes
- Filtering Materials (AREA)
- Electrostatic Separation (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Description
【発明の詳細な説明】
本発明は空気浄化、集塵、除塵等を目的として気体又は
液体中に混入している微粒子の除去に使用されるエレク
トレットフィルターに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electret filter used for removing particulates mixed in gas or liquid for purposes such as air purification, dust collection, and dust removal.
煙草の煙や塵埃等を空気中から除去して空気を浄化する
装置として、すでに電気除塵機や静電フィルター等が使
用されているが、これらは設備費が高くつくだけでなく
、有効な性能を維持する寿命が短いという欠点をもって
いる。Electric dust eliminators and electrostatic filters are already in use as devices to purify the air by removing cigarette smoke and dust from the air, but these devices not only have high equipment costs but also lack effective performance. The disadvantage is that it has a short service life.
本発明はこのような従来装置の欠点を解消するため、エ
レクトレット化された高分子フィルムをフィルターとし
て利用し、集塵性能が優れかつ寿命の長いエレクトレッ
トフィルターを提供しようとするものである。In order to eliminate such drawbacks of conventional devices, the present invention aims to provide an electret filter that has excellent dust collection performance and a long life by utilizing an electret polymer film as a filter.
本発明はエレクトレット化された高分子フィルムを導電
性シートを介して厚さの方向に積重ねた積層品を主材と
してエレクトレットフィルターを構成するのである。In the present invention, an electret filter is constructed using a laminated product in which electret polymer films are laminated in the thickness direction with conductive sheets interposed therebetween as the main material.
又本発明はエレクトレットフィルムを連続的に折曲げ又
は折畳み、フィルムの全面にひだを形成して厚さをもた
せると共に多数の連続空隙を作り、このひだ付きエレク
トレットフィルムを導電性シートを介して厚さの方向に
積重ね、ひだの先端を導電性シートに接着又は融着して
構成した積層品をエレクトレットフィルターの主材とす
るのである。In addition, the present invention involves continuously bending or folding an electret film, forming pleats on the entire surface of the film to increase its thickness, and creating a large number of continuous voids, and then passing this pleated electret film through a conductive sheet to increase its thickness. The main material of the electret filter is a laminated product in which the folds are stacked in this direction and the tips of the pleats are adhered or fused to a conductive sheet.
本発明において使用される高分子物質は溶融成形法、流
延成形法、切削成形法等によりフィルム成形が可能なも
のであればよく、例えばポリオレフィン樹脂、ポリエス
テル樹脂、ポリアミド樹脂等の熱可塑性樹脂、フェノー
ル樹脂、ホルムアルデヒド樹脂、尿素−ホルムアルデヒ
ド樹脂、メラミン−ホルムアルデヒド樹脂等の熱硬化性
樹脂を用いる。The polymeric substance used in the present invention may be any material that can be formed into a film by melt molding, casting, cutting, etc., such as thermoplastic resins such as polyolefin resins, polyester resins, and polyamide resins; Thermosetting resins such as phenol resin, formaldehyde resin, urea-formaldehyde resin, and melamine-formaldehyde resin are used.
これらの中でもエレクトレット性能の優れたポリエチレ
ン、ポリプロピレン、ポリ−４＝メチル−１−ペンテン
、ポリスチレン等のポリオレフィン樹脂のほか、ポリエ
チレンテレフタレート等のポリエステル樹脂やポリカー
ボネート樹脂が好適であり、これらは不飽和カルボン酸
及びその誘導体を配合又はグラフト重合したものを含む
。Among these, preferred are polyolefin resins such as polyethylene, polypropylene, poly-4=methyl-1-pentene, and polystyrene, which have excellent electret performance, as well as polyester resins such as polyethylene terephthalate and polycarbonate resins. and those obtained by blending or graft polymerization with derivatives thereof.
またこれらの樹脂には従来公知の安定剤、例えば酸化防
止剤、耐熱安定剤が必要に応じて配合される。Furthermore, conventionally known stabilizers such as antioxidants and heat-resistant stabilizers may be added to these resins as necessary.
高分子フィルムは通常約３μ〜３ｍｍの厚さに作り、必
要に応じて一方向又は二方向に延伸処理をする。The polymer film is usually made to have a thickness of about 3 μm to 3 mm, and is stretched in one or two directions as necessary.
この高分子フィルムは発泡化され又は多孔性であっても
よく、架橋化処理をされていてもよいし、不織布状のフ
ィルムでもよく、２枚以上を積層して用いることも行わ
れる。This polymer film may be foamed or porous, may be crosslinked, or may be a nonwoven film, and two or more films may be laminated.
高分子フィルムは公知の種々の方法例えば熱エレクトレ
ツト法、エレクトロエレクトレット法、ラジオエレクト
レット法、メカノエレクトレット法、マグネットエレク
トレット法、ホトエレクトレット法等によりエレクトレ
ット化される。The polymer film is made into an electret by various known methods such as a thermal electret method, an electroelectret method, a radio electret method, a mechanoelectret method, a magnet electret method, a photoelectret method, and the like.
このエレクトレット化処理は目的に応じてフィルム成形
と同時又はその前後に行われる。This electret processing is performed at the same time as the film forming, or before or after the film forming, depending on the purpose.
本発明に用いる導電性シートとしてはアルミホイール、
金網、導電性プラスチック、金属蒸着プラスチック等で
ある。As the conductive sheet used in the present invention, aluminum wheel,
These include wire mesh, conductive plastic, metal-deposited plastic, etc.
次に本発明の実施例を図面について説明する。Next, embodiments of the present invention will be described with reference to the drawings.
第１図に示す第１実施例はエレクトレットフィルム１を
連続して山形に折曲げ、フィルムの全面にひだ２を形成
して厚さをもたせると共に多数の三角筒の連続空隙３を
作り、このひだ付きエレクトレットフィルム１を導電性
シート４を介して厚さの方向に積重ねかつ上下にも導電
性シート４を添わせ、ひだの先端を導電性シート４に接
着又は融着して導電性シートを介在させたひだ付きエレ
クトレットフィルムの積層品５を構成する。In the first embodiment shown in FIG. 1, an electret film 1 is continuously folded into a mountain shape, and folds 2 are formed on the entire surface of the film to increase its thickness, and a large number of continuous gaps 3 of triangular cylinders are created. The attached electret films 1 are stacked in the thickness direction with conductive sheets 4 interposed therebetween, and conductive sheets 4 are attached above and below, and the ends of the pleats are glued or fused to the conductive sheets 4 to interpose the conductive sheets. A laminate 5 of the pleated electret film is constructed.
第２図に示す第２実施例はエレクトレットフィルム６を
連続したパイル状に折畳み、フィルムの全面にひだ７を
形成して厚さをもたせると共に多数の重円筒の連続空隙
８を作り、このひだ付きエレクトレットフィルム６を導
電性シート９を介して厚さの方向に積重ねかつ上下にも
導電性シート９を添わせ、各導電性シートに突設した仕
切片９′を連続空隙８の中へ突入させ、ひだの先端を導
電性シート９に接着又は融着してひだ付きエレクトレッ
トフィルムの積層品１０を構成する。In the second embodiment shown in FIG. 2, an electret film 6 is folded into a continuous pile shape, and pleats 7 are formed on the entire surface of the film to increase its thickness, and a large number of continuous voids 8 of heavy cylinders are created. Electret films 6 are stacked in the thickness direction with conductive sheets 9 interposed therebetween, and conductive sheets 9 are attached above and below, and partition pieces 9' protruding from each conductive sheet are inserted into the continuous gap 8. The ends of the pleats are adhered or fused to the conductive sheet 9 to form a laminate 10 of pleated electret film.
第３図に示す第３実施例はエレクトレットフィルム１１
を連続して縦長の台形状に折畳み、フィルムの全面にひ
だ１２を形成して厚さをもたせると共に多数の角筒状の
連続空隙１３を作り、このひだ付きエレクトレットフィ
ルム１１を導電性シート１４を介して厚さの方向に積重
ね、ひだの先端を導電性シート１４に接着又は融着して
ひだ付きエレクトレットフィルムの積層品１５を構成す
る。The third embodiment shown in FIG.
is continuously folded into a vertically elongated trapezoidal shape to form pleats 12 on the entire surface of the film to increase its thickness and to create a large number of prismatic cylindrical continuous voids 13. This pleated electret film 11 is then folded into a conductive sheet 14. The pleated electret film laminate 15 is constructed by stacking the pleated electret films in the thickness direction and adhering or fusing the tips of the pleats to the conductive sheet 14.
このようなエレクトレットフィルムの積層品５において
導電性シート４の表面電位を第４図に示す如く異極対向
とし又は第５図に示す如く同極対向にする。In such a laminated product 5 of electret films, the surface potentials of the conductive sheets 4 are set to have opposite polarities as shown in FIG. 4 or to have the same polarity opposite as shown in FIG. 5.
第２、第３実施例のエレクトレット積層品１０，１５に
ついても同じである。The same applies to the electret laminates 10 and 15 of the second and third embodiments.
第６図はフィルターの具体例を示すもので、前後の両面
を切開いた箱枠１６にひだ付きエレクトレットフィルタ
ーの積層品５を装入し、浄化しようとする空気を箱枠１
６の前後方向に流して連続空隙計・・を通過させる。Fig. 6 shows a specific example of a filter, in which a laminated product 5 of a pleated electret filter is inserted into a box frame 16 with both front and rear sides cut out, and the air to be purified is passed through the box frame 16.
6 in the front-back direction and pass through a continuous air gap meter.
本発明は第１〜第３実施例に示す如くエレクトレットフ
ィルムを連続的に折曲げ又は折畳んでフィルムの全面に
ひだ２，７，１２を形成し、このひだ付きエレクトレッ
トフィルム１，６．１１を厚さの方向に積重ね、ひだの
先端を導電性シート４．９．１４に接着又は融着して構
成した積層品５．１０，１５をフィルターの主材とする
のであり、浄化しようとする空気はひだの方向に流れて
連続空隙３，８．１３を通過する。In the present invention, as shown in the first to third embodiments, an electret film is continuously bent or folded to form pleats 2, 7, and 12 on the entire surface of the film, and the pleated electret films 1, 6, and 11 are The main material of the filter is a laminate product 5.10, 15, which is stacked in the thickness direction and the tips of the pleats are glued or fused to the conductive sheet 4.9.14, and the air to be purified is flows in the direction of the folds and passes through the continuous voids 3, 8.13.
本発明においては導電性シートを介してエレクトレット
フィルムを積重ねた積層品をフィルターの主材としてお
り、導電性シートの表面電位が異極対向又は同極対向の
いずれの場合も集塵効率が著るしく向上しかつ寿命も著
るしく長くなり、特に同極対向の場合は長いフィルムを
折曲げることによりその構造が得られるので製作が容易
となる。In the present invention, the main material of the filter is a laminated product in which electret films are laminated via conductive sheets, and the dust collection efficiency is remarkable whether the surface potentials of the conductive sheets are opposite polarities or opposite polarities. In particular, in the case of homopolar facing, the structure can be obtained by bending a long film, making it easy to manufacture.
又本発明においては空気とエレクトレットフィルムとの
接触面積が拡大されるから集塵効率が向上し、空気が流
通しやすいので圧力損失が少な（、ひだ付きエレクトレ
ットフィルムはひだの先端を導電性シートに接着又は融
着しているので形くずれを起さないし、使用時にばたつ
かないから一旦付着した塵埃が飛散せず、これらが相持
って集塵性能が優れかつ寿命の長いフィルターが得られ
るのである。In addition, in the present invention, since the contact area between air and the electret film is expanded, dust collection efficiency is improved, and air can easily circulate, resulting in less pressure loss. Since it is bonded or fused, it does not lose its shape, and since it does not flap during use, the dust that has adhered to it does not scatter, and these combine to provide a filter with excellent dust collection performance and a long lifespan. be.
本発明に係るフィルターを導電性を介しないものと比較
すると第１表の通りである。Table 1 shows a comparison of the filter according to the present invention with a filter that does not have conductivity.
この第１表から明らかなように導電性シートの有無は圧
力損失に関係しないが、本発明では初期効率並びに経時
効率が高（，２つの効率は殆んど変らないから本発明に
係るフィルターの寿命が著るしく長いことが判る。As is clear from Table 1, the presence or absence of a conductive sheet has no relation to pressure loss, but in the present invention, the initial efficiency and aging efficiency are high (the two efficiencies are almost unchanged, so the filter according to the present invention has a high initial efficiency and a high aging efficiency. It can be seen that the lifespan is significantly longer.
本発明によるときは導電性シートを介在させたエレクト
レットフィルムの積層品をフィルターの主材とするから
、集塵効率が著るしく高くかつ寿命も著るしく長い効果
があり、さらに本発明においては使用時にばたつかない
から一旦付着した塵埃が再飛散せず、圧力損失が極めて
小さいからエネルギーを節約できるし、接触面積が広い
ので集塵効率が高く、初期効率及び経時効率の両方とも
優れている等の多くの効果を有す。According to the present invention, since the main material of the filter is a laminated product of electret film with a conductive sheet interposed therebetween, the dust collection efficiency is extremely high and the service life is extremely long. Since it does not flap during use, the dust that has adhered to it will not be dispersed again, and the pressure loss is extremely small, which saves energy.The contact area is large, so dust collection efficiency is high, and both initial efficiency and efficiency over time are excellent. It has many effects such as:
第１、第２、第３図は本発明の第１〜第３実施例を示す
正面図、第４図と第５図は導電性シートの表面電位の説
明図、第６図はフィルターの具体例を示す斜視図である
。
なお、１，６，１１はひだ付きエレクトレットフィルム
、２，７，１・２はひだ、３，８．１３は連続空隙、４
，９，１４は導電シートである。1, 2, and 3 are front views showing the first to third embodiments of the present invention, FIGS. 4 and 5 are explanatory diagrams of the surface potential of the conductive sheet, and FIG. 6 is a specific example of the filter. It is a perspective view showing an example. Note that 1, 6, and 11 are pleated electret films, 2, 7, 1, and 2 are pleats, 3, 8, and 13 are continuous voids, and 4
, 9 and 14 are conductive sheets.
Claims (1)
ートを介して厚さの方向に積重ねて積層品を構成し、こ
の積層品を主材として構成したエレクトレットフィルタ
ー。 ２ エレクトレットフィルムを連続的に折曲げ又は折畳
み、フィルムの全面にひだを形成して厚さをもたせると
共に多数の連続空隙を作り、このひだ付きエレクトレッ
トフィルムを導電性シートを介して厚さの方向に積重ね
、ひだの先端を導電性シートに接着又は融着して構成し
た積層品を特徴とする特許請求の範囲第１項に記載のエ
レクトレットフィルター。[Scope of Claims] 1. An electret filter constructed by laminating electretized polymer films in the thickness direction with conductive sheets interposed therebetween to construct a laminate product, and using this laminate product as the main material. 2. Continuously bend or fold the electret film to form pleats on the entire surface of the film to increase its thickness and create a large number of continuous voids, and then fold this pleated electret film in the thickness direction through a conductive sheet. The electret filter according to claim 1, characterized in that it is a laminate product formed by stacking and adhering or fusing the ends of the pleats to a conductive sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8734479A JPS5925612B2 (en) | 1979-07-09 | 1979-07-09 | electret filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8734479A JPS5925612B2 (en) | 1979-07-09 | 1979-07-09 | electret filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5610313A JPS5610313A (en) | 1981-02-02 |
| JPS5925612B2 true JPS5925612B2 (en) | 1984-06-19 |
Family
ID=13912243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8734479A Expired JPS5925612B2 (en) | 1979-07-09 | 1979-07-09 | electret filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5925612B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2037942A1 (en) * | 1990-03-12 | 1991-09-13 | Satoshi Matsuura | Process for producing an electret, a film electret, and an electret filter |
| JPH05214A (en) * | 1990-11-30 | 1993-01-08 | Mitsui Petrochem Ind Ltd | Electret filter |
| US6524488B1 (en) | 1998-06-18 | 2003-02-25 | 3M Innovative Properties Company | Method of filtering certain particles from a fluid using a depth loading filtration media |
| US6280824B1 (en) * | 1999-01-29 | 2001-08-28 | 3M Innovative Properties Company | Contoured layer channel flow filtration media |
| US6454839B1 (en) | 1999-10-19 | 2002-09-24 | 3M Innovative Properties Company | Electrofiltration apparatus |
| US6589317B2 (en) | 2001-08-10 | 2003-07-08 | 3M Innovative Properties Company | Structured surface filtration media array |
| US6758884B2 (en) | 2002-08-07 | 2004-07-06 | 3M Innovative Properties Company | Air filtration system using point ionization sources |
| US7141098B2 (en) | 2004-01-22 | 2006-11-28 | 3M Innovative Properties Company | Air filtration system using point ionization sources |
| CN104371295A (en) * | 2014-11-13 | 2015-02-25 | 杭州美固科技有限公司 | Prefilter flask formula and preparation process thereof |
-
1979
- 1979-07-09 JP JP8734479A patent/JPS5925612B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5610313A (en) | 1981-02-02 |
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