JPH01258714A - Electret filter - Google Patents
Electret filterInfo
- Publication number
- JPH01258714A JPH01258714A JP63085985A JP8598588A JPH01258714A JP H01258714 A JPH01258714 A JP H01258714A JP 63085985 A JP63085985 A JP 63085985A JP 8598588 A JP8598588 A JP 8598588A JP H01258714 A JPH01258714 A JP H01258714A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- electret
- vapor
- electret filter
- deposited metal
- 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
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 27
- 239000003989 dielectric material Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 17
- 239000002245 particle Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 238000007740 vapor deposition Methods 0.000 description 12
- 239000004744 fabric Substances 0.000 description 7
- -1 polypropylene Polymers 0.000 description 7
- 239000004750 melt-blown nonwoven Substances 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- YHQXBTXEYZIYOV-UHFFFAOYSA-N 3-methylbut-1-ene Chemical compound CC(C)C=C YHQXBTXEYZIYOV-UHFFFAOYSA-N 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 108091006629 SLC13A2 Proteins 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Filtering Materials (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はクリーンルームの空気清浄、ビルの空気調和や
工場排気の浄化用等のエアーフィルター、空気清浄機、
掃除機、複写機などのエアーフィルターやマスクなどに
用いることのできる高帯電量エレクトレフトフィルター
に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention relates to air filters, air purifiers, etc. for clean room air purification, building air conditioning, factory exhaust purification, etc.
This invention relates to a high-charge electric left filter that can be used for air filters and masks for vacuum cleaners, copying machines, etc.
（従来技術）
従来、エレクトレットフィルターには特公昭５６−４７
２９９に開示さているエレクトレットフィルターがある
。このフィルターはフィーレムをエレクトレット化し、
次いで小繊維化してシート化されるため、フィルターの
もつ帯電量は大きいが、フィルムのスプリット幅を狭く
切ることが出来ないため、繊維が矩型で繊維の形状によ
る機械的捕集効果が小さく、これが原因でフィルターを
長期にわたって使用すると静電気の中和現象によって捕
集効率が経時的に低下し捕集効率が回復しないと言う問
題があった。特公昭５３−４００７３に開示されている
絶縁フィルムをアース電極上に敷いて、その上に繊維シ
ートを置き、エレクトレット化する方法から作製される
フィルターは繊維シートが多孔質のために帯電量が低く
、高い捕集効率が得られないと言う問題があった。(Prior art) Conventionally, electret filters were
There is an electret filter disclosed in No. 299. This filter turns Feelem into an electret,
Since the filter is then made into small fibers and made into a sheet, the amount of charge that the filter has is large, but because the film cannot be cut into narrow split widths, the fibers are rectangular and the mechanical collection effect due to the shape of the fibers is small. Due to this, when the filter is used for a long period of time, the collection efficiency decreases over time due to the neutralization phenomenon of static electricity, and there is a problem that the collection efficiency does not recover. The filter manufactured by the method disclosed in Japanese Patent Publication No. 53-40073, in which an insulating film is spread on a ground electrode and a fiber sheet is placed on top of it to form an electret, has a low charge amount because the fiber sheet is porous. However, there was a problem in that high collection efficiency could not be obtained.
（発明が解決しようとする問題点）
本発明はかかる従来技術における問題点すなわち長期に
わたって使用しても捕集効率が低下しない、高レベルに
帯電したエレクトレットフィルターの提供を目的とする
ものである。(Problems to be Solved by the Invention) The present invention aims to solve the problems in the prior art, namely to provide a highly charged electret filter whose collection efficiency does not decrease even after long-term use.
（問題点を解決するための手段）
本発明は高分子誘電体の多孔質シートで構成され、該シ
ートが金属蒸着層を有するエレクトレットシートである
ことを特徴とする高帯電景エレクトレフトフィルターに
関するものである。(Means for Solving the Problems) The present invention relates to a highly charged electreft filter comprising a porous sheet of polymeric dielectric material, the sheet being an electret sheet having a metal vapor deposited layer. It is.
本発明において、高分子誘電体の多孔質シートに金属蒸
着膜を施して後、エレクトレノト化すると極めて高い帯
電量のエレクトレットフィルターが得られ、加えてこの
高帯電量エレクトレットフィルターは金属蒸着膜によっ
て、その帯電量が長間にわたって安定であるとδう特徴
を有する。In the present invention, an electret filter with an extremely high charge amount can be obtained by applying a metal vapor deposited film to a porous polymer dielectric sheet and then converting it into an electret filter. It has the characteristic that the amount of charge is stable over a long period of time.
本発明において、金属薄着層を施して後、荷電し晶帯Ｔ
Ｌｌとなる理由は明確ではないが、未蒸着のエレクトレ
ットフィルターと比較すると、表面電位分布がエレクト
レットフィルター全面にわたって非常に均一となること
から、金属蒸着膜による電荷注入の均一化が帯電量向上
と関係があると推測される。In the present invention, after applying a thin metal layer, a charged crystal band T
The reason for Ll is not clear, but compared to an undeposited electret filter, the surface potential distribution is very uniform over the entire surface of the electret filter, so it seems that the uniformity of charge injection by the metal deposited film is related to the increase in the amount of charge. It is assumed that there is.
本発明において、高分子誘電体にはポリプロピレン、ポ
リエチレン、ポリ−３−メチル−１−ブテン、ポリ−４
−メチル−１−ペンテン、ポリ弗化ビニリデン、ポリテ
トラフロロエチレンポリカーボネーＩ・、ポリスチレン
、ポリ塩化ビニリデン、ポリ塩化ビニル、ポリエチレン
テレフタレート、ポリアミド、ポリアクリロニルトリル
、ポリサルホン、ポリフェニレンオキサイド等があげら
れるが、好ましくはポリプロピレン、ポリ−３−メチル
−１−ブテン、ポリ−４−メチル−１−ペンテン、ポリ
弗化ビニリデン、ポリカーボネートなどである。In the present invention, polymer dielectrics include polypropylene, polyethylene, poly-3-methyl-1-butene, poly-4
-Methyl-1-pentene, polyvinylidene fluoride, polytetrafluoroethylene polycarbonate I, polystyrene, polyvinylidene chloride, polyvinyl chloride, polyethylene terephthalate, polyamide, polyacrylonyl tolyl, polysulfone, polyphenylene oxide, etc. , preferably polypropylene, poly-3-methyl-1-butene, poly-4-methyl-1-pentene, polyvinylidene fluoride, polycarbonate, and the like.
本発明において、多孔質シートには不織布、織物、編物
などの繊維シート、多孔質フィルム、多孔質フオームな
どが挙げられる
本発明において、金属蒸着層は通常、真空下で舊気状態
の金属を多孔質材シートの表面に付着させることで形成
される。その厚さは５００オングストローム以下、好ま
しくは２００オングストローム以下より好ましくは１０
０オングストローム以下がよい。これらの金属蒸着層の
厚さはコンダクトメータ（日立製作所ＣＤＭ−３＞によ
り、その電気抵抗を測定して求められる。In the present invention, porous sheets include fiber sheets such as nonwoven fabrics, woven fabrics, and knitted fabrics, porous films, porous foams, etc. In the present invention, the metal vapor-deposited layer is usually formed by forming a porous metal layer under vacuum. It is formed by adhering it to the surface of a material sheet. Its thickness is less than 500 angstroms, preferably less than 200 angstroms, more preferably 10
The thickness is preferably 0 angstrom or less. The thickness of these metal vapor deposited layers is determined by measuring their electrical resistance using a conductometer (Hitachi CDM-3).
本発明において、金属蒸着層は連結した膜状であるが、
不連続の層であってもさしつかえない。In the present invention, the metal vapor deposited layer is in the form of a connected film, but
There is no problem even if the layer is discontinuous.
金属蒸着層が薄くなると膜状となり得す、独立した微粒
子状となるが、こうした場合にも膜状の場合と同様の効
果がある。When the metal vapor deposition layer becomes thinner, it may become film-like or independent fine particles, but in such cases, the same effect as in the film-like case can be obtained.
本発明において、多孔質シート中での金属蒸着層は、多
孔質シートの表面、表裏両面又は内部に形成される。In the present invention, the metal vapor deposition layer in the porous sheet is formed on the surface of the porous sheet, on both the front and back surfaces, or inside the porous sheet.
本発明において、金属蒸着層はアルミニウム、銀、錫、
銅などが挙げられる。中でも銀、銅は抗菌機能を付与し
たエレクトレットフィルターとして使用できる。In the present invention, the metal vapor deposition layer includes aluminum, silver, tin,
Examples include copper. Among them, silver and copper can be used as electret filters with antibacterial functions.
本発明において高帯電量エレクトレフトフィルターにす
る荷電方法としてはコロナ荷電、電界荷電、熱間電界荷
電、電子線照射などがあるが、特にこれらに限定するも
のではない、コロナ放電、電界荷電の場合は１０ｋｖ／
ｃｍ以上、好ましくは１５ｋｖ／１以上の電界強度が適
しており、電子線照射の場合は０．１〜ｌ Ｍｒａｄの
照射が望ましい。In the present invention, charging methods for producing a high charge amount electric left filter include corona charging, electric field charging, hot electric field charging, electron beam irradiation, etc., but are not particularly limited to these. is 10kv/
An electric field strength of 1 cm or more, preferably 15 kv/1 or more is suitable, and in the case of electron beam irradiation, an irradiation of 0.1 to 1 Mrad is desirable.
本発明において高帯電量エレクトレフトフィルターは（
１１式により求められる単繊維捕集効率比η／η。が１
．５以上を有する。In the present invention, the high charge amount electric left filter is (
Single fiber collection efficiency ratio η/η determined by Equation 11. is 1
．． It has 5 or more.
η。：従来法で作製されるエレクトレットフィルターの
単繊維捕集効率
η ：本発明の高帯電量エレクトレットフィルターの単
繊維捕集効率
Ｅｏ ：従来法で作製されるエレクトレットフィルター
の実測される粒子捕集効率
Ｅ ：本発明の高帯電量エレクトレットフィルターの実
測される粒子捕集効率
ここにおいて、従来法で作製されるエレクｉ−レフトフ
ィルターとは本発明における金属蒸着層を有していない
多孔質シートを本発明におけると同じ荷電方法でエレク
トレットフィルターとすることを意味する。η. : Single fiber collection efficiency η of the electret filter produced by the conventional method : Single fiber collection efficiency Eo of the high charge amount electret filter of the present invention : Actual measured particle collection efficiency E of the electret filter produced by the conventional method :Actually measured particle collection efficiency of the high charge amount electret filter of the present invention.Here, the Electret filter produced by the conventional method refers to the porous sheet that does not have a metal deposited layer in the present invention. This means that the electret filter is made using the same charging method as in .
粒子捕集効率の測定は直径０．３μｍのＮａＣＩ！、粒
子を線速５ｃｍ／ｓｅｅで試験用フィルターに供給した
ときのフィルターの上流側と下流側とのＮａＣ１粒子濃
度をレーザーパーティクルカウンター（リオンＫＡ −
１４”）で計測しく２）式から求めた値である。The particle collection efficiency was measured using NaCI! with a diameter of 0.3 μm. When particles were supplied to the test filter at a linear velocity of 5 cm/see, the NaCl particle concentration on the upstream and downstream sides of the filter was measured using a laser particle counter (Rion KA-
14") and is the value obtained from equation 2).
ただし、
ＣＩ ＝試験用フィルターの上流側における０、３μ−
直径のＮａＣ１−粒子濃度
Ｃ２：試験用フィルターの下流側における０、３μｍ直
径のＮａＣ１粒子濃度
この１．５倍の単繊維捕集効率の増大は機械的な捕集効
率の寄与は小さく、そのほとんどが静電気的な捕集効率
の増大なのであり、つまり帯電量が従来法のエレクトレ
ットフィルターに比べ大幅に（約１．５倍に）増えたこ
とを示している。However, CI = 0,3 μ- on the upstream side of the test filter
NaC1-particle concentration C2: concentration of NaC1 particles with a diameter of 0.3 μm on the downstream side of the test filter This 1.5-fold increase in single fiber collection efficiency has a small contribution from mechanical collection efficiency, and most of it This is an increase in electrostatic collection efficiency, which means that the amount of charge has increased significantly (about 1.5 times) compared to the conventional electret filter.
本発明によるエレクトレットフィルターの荷電量（粒子
捕集効率から求めた値）は０．８ｎｃ／ｃ＋ａ以上、好
ましくは１．０ｎｃ／ｃ−以上である。（従来法では０
．３〜０．６ｎｃ／ｃｄで０．６ｎｃ／ｃ−以上の荷電
は付与できなかった）。The amount of charge (value determined from particle collection efficiency) of the electret filter according to the present invention is 0.8 nc/c+a or more, preferably 1.0 nc/c- or more. (In the conventional method, 0
．． 3 to 0.6 nc/cd, it was not possible to impart a charge of 0.6 nc/c- or more).
次の実施例で更に具体的に示す。This will be shown in more detail in the following example.
（実施例）
実施例１
繊維径１．５μ−のポリプロピレンメルトブロー不織布
シート（繊維１３０ｇ／ｒ４）に銀を厚さ３００オング
ストロームの金属蒸着加工を施した。(Examples) Example 1 A polypropylene melt-blown nonwoven fabric sheet (fibers 130 g/r4) with a fiber diameter of 1.5 .mu.m was subjected to metal vapor deposition processing with silver to a thickness of 300 angstroms.
次いで、コロナ針電極を用いて半導体シートを敷いたア
ース電極面上に銀蒸着加工を施したメルトブロー不織布
シートを置き、２０ｋｖ／ＣＩｌの高電圧を４秒間印加
して高帯電量エレクトレットフィルターを作製した。こ
のエレクトレットフィルターを試験線速５ｃｍ／ｓｅｃ
で０．３μ面のＮａＣ１粒子の捕集効率をレーザーバー
ティクカウンター（リオンＫＡ−１４）で測定した。又
、同時に高帯電量エレクトレフトフィルターの圧力損失
をマノスターゲージにて測定した。Next, a melt-blown nonwoven fabric sheet treated with silver vapor deposition was placed on the ground electrode surface covered with a semiconductor sheet using a corona needle electrode, and a high voltage of 20 kv/Cl was applied for 4 seconds to produce a high charge amount electret filter. . This electret filter was tested at a linear speed of 5 cm/sec.
The collection efficiency of NaCl particles with a 0.3μ surface was measured using a laser vertical counter (Rion KA-14). At the same time, the pressure loss of the high-charge electrified left filter was measured using a Manostar gauge.
比較例！
実施例１のメルトブロー不織布を銀蒸着加工を施さずに
実施例１と同じ荷電条件でエレクトレット化し、比較例
１のエレクトレットフィルターを作製し、粒子捕集効率
と圧力損失を測定した。Comparative example! The melt-blown nonwoven fabric of Example 1 was made into an electret under the same charging conditions as in Example 1 without being subjected to silver vapor deposition to produce an electret filter of Comparative Example 1, and the particle collection efficiency and pressure loss were measured.
表−１ 表１に実施例１と比較例１の結果を示した。Table-1 Table 1 shows the results of Example 1 and Comparative Example 1.
実施例１の圧力損失は比較例１と変わることなく、単繊
維捕集効率比η／η。のみが１．８と著しい増加を示し
、本発明における金属蒸着層の効果が明らかであった。The pressure loss of Example 1 was the same as that of Comparative Example 1, and the single fiber collection efficiency ratio η/η. only showed a remarkable increase of 1.8, and the effect of the metal vapor deposited layer in the present invention was clear.
実施例２
実施例１のメルトブロー不織布シートにアルミニウムを
厚さ５０オングストロームの金属蒸着加工を施した。Example 2 The melt-blown nonwoven fabric sheet of Example 1 was subjected to metal vapor deposition processing of aluminum to a thickness of 50 angstroms.
次いで、コロナ針電極を用いて半導体シートを敷いたア
ース電極面上にアルミニウム蒸着加工を施したメルトブ
ロー不織布シートを置き、２０ｋｖ ／１の高電圧を４
秒間印加して高帯電量エレクトレットフィルターを作製
した。Next, using a corona needle electrode, a melt-blown nonwoven fabric sheet treated with aluminum vapor deposition was placed on the ground electrode surface covered with a semiconductor sheet, and a high voltage of 20 kv/1 was applied to the ground electrode surface for 4 hours.
A high charge amount electret filter was produced by applying the voltage for a second.
このエレクトレットフィルターを試験線速５Ｃ１ｌ／ｓ
ｅｃで０．３μ−のＮａＣＩ！、粒子の捕集効率を効率
をレーザーバーティクカウンター（リオンＫＡ −１４
）で測定した。又、同時に高帯電量エレクトレットフィ
ルターの圧力損失をマノスターゲージにて測定した。This electret filter was tested at a linear speed of 5C1l/s.
0.3μ-NaCI in ec! , to measure the particle collection efficiency using a laser vertical counter (Rion KA-14).
) was measured. At the same time, the pressure loss of the high charge amount electret filter was measured using a Manostar gauge.
比較例２
比較例１のエレクトレットメルトブロー不織布シートに
アルミニウムを５０オングストロームの金属蒸着加工を
施した。Comparative Example 2 The electret melt-blown nonwoven fabric sheet of Comparative Example 1 was subjected to metal vapor deposition processing of 50 angstroms of aluminum.
次いでこのエレクトレットフィルターを実施例２と同じ
試験条件で捕集効率と圧力損失を測定した。Next, the collection efficiency and pressure loss of this electret filter were measured under the same test conditions as in Example 2.
実施例２と比較例２の結果を表２に示した。比較例２は
金属蒸着加工を荷電処理後に施しても、何んら帯電量の
向上には効果がないことを示している。The results of Example 2 and Comparative Example 2 are shown in Table 2. Comparative Example 2 shows that even if the metal vapor deposition process is performed after the charging process, there is no effect on improving the amount of charging.
実施例２はアルミニウムの金属蒸着層厚さが薄いと、荷
電処理による帯電量の増大が極めて著しかった。In Example 2, when the thickness of the aluminum metal vapor deposited layer was thin, the amount of charge increased significantly due to the charging treatment.
実施例３
繊維径４μ曙のポリプロピレンスパンボンド（繊維ｆ１
４０ｇ／ｎ（）に銅を１００オングストロームの厚さで
金属蒸着加工を施した。Example 3 Polypropylene spunbond with a fiber diameter of 4 μm (fiber f1
40 g/n() was subjected to metal vapor deposition processing with copper to a thickness of 100 angstroms.
次いで、実施例１と同様の荷電条件で高帯電量エレクト
レットフィルターを作成した。このエレクトレットフィ
ルターを実施例２と同様、捕集効率と圧力…失を測定し
た。結果を表３に示す。Next, a high charge amount electret filter was created under the same charging conditions as in Example 1. The collection efficiency and pressure loss of this electret filter were measured in the same manner as in Example 2. The results are shown in Table 3.
比較例４
実施例３のスパンボンドを金属蒸着加工を施すことなく
、実施例１と同様の荷電条件でエレクトレットフィルタ
ーを作成し、次いで、実施例１と同じ試験条件で捕集効
率と圧力［員失を測定した。Comparative Example 4 An electret filter was created using the spunbond material of Example 3 under the same charging conditions as in Example 1 without undergoing metal vapor deposition processing. The loss was measured.
結果を表３に示す。The results are shown in Table 3.
表−３
次に、実施例２と比較例１．２の表面電位を川口電機製
Ｓ−２１１型の表面電位計で測定した。この結果を表４
に示した。この結果から明らかなごとく、金属蒸着加工
を施して後、荷電処理して作製した高帯電量エレクトレ
ットフィルターは外界に対し、非常に高い表面電位を示
した。Table 3 Next, the surface potentials of Example 2 and Comparative Example 1.2 were measured using a Kawaguchi Electric S-211 surface potential meter. This result is shown in Table 4.
It was shown to. As is clear from these results, the highly charged electret filter produced by performing metal vapor deposition and then charging showed a very high surface potential with respect to the outside world.
表−４
実施例２と比較例１との単繊維捕集効率の耐久性を第１
図に示した。この図から明らかなごとく、実施例１は比
較例１に比べて、初期においても、経時後においても高
いレベルを保持している。Table 4 The durability of single fiber collection efficiency of Example 2 and Comparative Example 1 was
Shown in the figure. As is clear from this figure, Example 1 maintains a higher level than Comparative Example 1 both at the initial stage and after time.
（発明の効果）
本発明によると粒子捕集効率が向上し、長期にわたって
粒子捕集効率の安定なエレクトレフトフィルターを提供
することができる。(Effects of the Invention) According to the present invention, it is possible to provide an electric left filter with improved particle collection efficiency and stable particle collection efficiency over a long period of time.
【図面の簡単な説明】
第１図は本発明で得られたエレクトレットフィルターと
従来からのエレクトレフトフィルターにおける単繊維捕
集効率の経時変化を示している。
昂１ 図
期間（斗）BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows changes over time in the single fiber collection efficiency of the electret filter obtained by the present invention and the conventional electret filter. Kou 1 figure period (Dou)
Claims (1)
金属蒸着層を有したエレクトレットシートであることを
特徴とする高帯電量エレクトレットフイルターA high charge amount electret filter comprising a porous sheet of polymeric dielectric material, the sheet being an electret sheet having a metal vapor deposited layer.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63085985A JP2536584B2 (en) | 1988-04-06 | 1988-04-06 | Electret filter |
| DE3839956A DE3839956C2 (en) | 1987-11-28 | 1988-11-26 | Electret film and process for its production |
| US07/276,617 US5112677A (en) | 1987-11-28 | 1988-11-28 | Electret sheet and a method for the production of the same |
| US07/770,564 US5110620A (en) | 1987-11-28 | 1991-10-03 | Method for the production of an electret sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63085985A JP2536584B2 (en) | 1988-04-06 | 1988-04-06 | Electret filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01258714A true JPH01258714A (en) | 1989-10-16 |
| JP2536584B2 JP2536584B2 (en) | 1996-09-18 |
Family
ID=13873983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63085985A Expired - Lifetime JP2536584B2 (en) | 1987-11-28 | 1988-04-06 | Electret filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2536584B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007105645A (en) * | 2005-10-14 | 2007-04-26 | Hitachi Appliances Inc | Pre-filter for air conditioner, and air conditioner using it |
| WO2013026193A1 (en) * | 2011-08-23 | 2013-02-28 | Empire Technology Development Llc | Self-cleaning electret filter |
| US8809766B2 (en) | 2010-06-29 | 2014-08-19 | Empire Technology Development Llc | Methods and systems for detecting or collecting particles |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10010892B2 (en) * | 2013-10-15 | 2018-07-03 | Yupo Corporation | Filter |
-
1988
- 1988-04-06 JP JP63085985A patent/JP2536584B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007105645A (en) * | 2005-10-14 | 2007-04-26 | Hitachi Appliances Inc | Pre-filter for air conditioner, and air conditioner using it |
| JP4636990B2 (en) * | 2005-10-14 | 2011-02-23 | 日立アプライアンス株式会社 | Pre-filter for air conditioner and air conditioner using the same |
| US8809766B2 (en) | 2010-06-29 | 2014-08-19 | Empire Technology Development Llc | Methods and systems for detecting or collecting particles |
| WO2013026193A1 (en) * | 2011-08-23 | 2013-02-28 | Empire Technology Development Llc | Self-cleaning electret filter |
| US8597405B2 (en) | 2011-08-23 | 2013-12-03 | Empire Technology Development Llc | Self-cleaning electret filter |
| CN103702762A (en) * | 2011-08-23 | 2014-04-02 | 英派尔科技开发有限公司 | Self-cleaning electret filter |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2536584B2 (en) | 1996-09-18 |
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