JP2006346174A - Air filter medium for cleaner and air filter unit for cleaner - Google Patents

Air filter medium for cleaner and air filter unit for cleaner Download PDF

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JP2006346174A
JP2006346174A JP2005176417A JP2005176417A JP2006346174A JP 2006346174 A JP2006346174 A JP 2006346174A JP 2005176417 A JP2005176417 A JP 2005176417A JP 2005176417 A JP2005176417 A JP 2005176417A JP 2006346174 A JP2006346174 A JP 2006346174A
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air filter
filter medium
cleaner
vacuum cleaner
ptfe
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Hiroko Niijima
裕子 新島
Eizo Kawano
栄三 川野
Michitoshi Suzuki
理利 鈴木
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Nitto Denko Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air filter medium for a cleaner for improving dust releasability and making the catching efficiency of the medium hard to decline even when washing is performed. <P>SOLUTION: The air filter medium 3 for a cleaner includes at least one layer of a polytetrafluoroethylene porous membrane 1 and at least one layer of an air permeable support material membrane 2, and the catching efficiency of powder for testing in the case of bringing the powder for testing whose grain size is in the range of 0.3 to 0.5μm into contact at the flow velocity of 5.3 cm/second is in the range of 99.97% or higher. Also, in an air filter unit for the cleaner, the pleated air filter medium for the cleaner is deposited inside a support frame by using insertion molding. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、掃除機用エアフィルタ濾材に関し、さらにこのフィルタ濾材を用いた掃除機用エアフィルタユニットに関する。   The present invention relates to an air filter medium for a vacuum cleaner, and further relates to an air filter unit for a vacuum cleaner using the filter medium.

従来、掃除機の分野においては、排気の清浄化に用いるフィルタ濾材として、ポリプロピレン製のエレクトレット不織布やガラス繊維製の濾材が使用されている(特許文献1参照)。
特開平5−214号公報
Conventionally, in the field of vacuum cleaners, an electret non-woven fabric made of polypropylene or a filter material made of glass fiber has been used as a filter medium used for exhaust purification (see Patent Document 1).
Japanese Patent Laid-Open No. 5-214

しかしながら、これら従来のフィルタ濾材では、塵離れが悪くフィルタの掃除が容易でない。また、洗浄により静電効果が失われてしまうため繰り返し使用するのが困難であるという問題がある。   However, these conventional filter media have poor dust separation and are not easy to clean. Moreover, since the electrostatic effect is lost by washing, there is a problem that it is difficult to use repeatedly.

そこで本発明は、塵離れが良く、かつ洗浄してもその捕集効率が低下しにくい掃除機用エアフィルタ濾材を提供することを目的とする。また、本発明の別の目的は、このフィルタ濾材を用いた掃除機用エアフィルタユニットを提供することにある。   Therefore, an object of the present invention is to provide an air filter medium for a vacuum cleaner that has good dust separation and whose collection efficiency is less likely to decrease even when washed. Another object of the present invention is to provide a vacuum filter air filter unit using the filter medium.

本発明の掃除機用エアフィルタ濾材は、少なくとも一層のポリテトラフルオロエチレン多孔質膜と、少なくとも一層の通気性支持材膜とを含み、粒径が0.3〜0.5μmの範囲にある試験用粉体を5.3cm/秒の流速で接触させた場合の、当該試験用粉体の捕集効率が99.97%以上の範囲にあることを特徴とする。   The air filter medium for vacuum cleaner of the present invention includes at least one polytetrafluoroethylene porous membrane and at least one breathable support material membrane, and has a particle size in the range of 0.3 to 0.5 μm. When the powder for contact is brought into contact at a flow rate of 5.3 cm / sec, the collection efficiency of the powder for test is in the range of 99.97% or more.

ここで、上記『捕集効率』とは、掃除機用エアフィルタ濾材の一方の最外層側から、粒径が0.3〜0.5μmの範囲にある試験用粉体を5.3cm/秒の流速で接触させた場合に、下記式(1)に基づいて規定される値を意味するものである。   Here, the above “collection efficiency” means that the test powder having a particle size in the range of 0.3 to 0.5 μm is 5.3 cm / second from the outermost layer side of the air filter medium for a vacuum cleaner. Means a value defined on the basis of the following formula (1).

Figure 2006346174
Figure 2006346174

また、上記『粒径』とは、体積平均粒径を意味する。また、上記『試験用粉体』としては、例えば、JIS試験用粉体の9種に規定されるタルクを用いることができる。   The “particle diameter” means a volume average particle diameter. Further, as the “test powder”, for example, talc defined in nine types of JIS test powder can be used.

本発明は、別の側面から、前記掃除機用エアフィルタ濾材と、前記掃除機用エアフィルタ濾材を担持する支持枠とを含む掃除機用エアフィルタユニットであって、前記掃除機用エアフィルタ濾材が、少なくとも一部の断面形状がW字状となるようにプリーツ加工されており、かつインサート成型によって前記支持枠内に担持されていることを特徴とする掃除機用エアフィルタユニットを提供する。   Another aspect of the present invention is an air filter unit for a vacuum cleaner comprising the air filter medium for the vacuum cleaner and a support frame for supporting the air filter medium for the vacuum cleaner, the air filter medium for the vacuum cleaner. However, the present invention provides an air filter unit for a vacuum cleaner, which is pleated so that at least a part of the cross-sectional shape is W-shaped, and is carried in the support frame by insert molding.

本発明によれば、未使用の状態であっても、洗浄した後に乾燥させた状態であっても、粒径が0.3〜0.5μmの範囲にある試験用粉体を5.3cm/秒の流速で接触させた場合に、99.97%以上の捕集効率を発揮する掃除機用エアフィルタ濾材が提供される。また、高い離形性を有するポリテトラフルオロエチレンの多孔質膜を含むことにより、塵離れ性の高いフィルタ濾材が提供される。   According to the present invention, a test powder having a particle size in the range of 0.3 to 0.5 μm can be obtained at 5.3 cm / day, whether in an unused state or in a state after being washed and dried. An air filter medium for a vacuum cleaner that exhibits a collection efficiency of 99.97% or more when contacted at a flow rate of seconds is provided. Moreover, the filter medium with high dust separation property is provided by including the porous membrane of polytetrafluoroethylene which has high mold release property.

以下、図面を参照しながら、本発明の好ましい実施形態について説明する。   Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

図1の断面図で示す掃除機用エアフィルタ濾材3は、中央に配された一層のポリテトラフルオロエチレン(PTFE)多孔質膜1と、このPTFE多孔質膜1を挟んで配された二層の通気性支持材膜2とを有する三層のフィルタ膜構造をしている。   The vacuum filter air filter medium 3 shown in the cross-sectional view of FIG. 1 has a single layer of polytetrafluoroethylene (PTFE) porous film 1 disposed in the center and two layers disposed with the PTFE porous film 1 interposed therebetween. A three-layer filter membrane structure having a breathable support material membrane 2.

上記PTFE多孔質膜1は、平均孔径が0.01〜5μmであり、平均繊維径が0.01〜0.3μmであるものが好ましい。また、その面積延伸倍率は300〜750倍の範囲にあるものが好ましい。また、流速5.3cm/秒の空気に対する圧力損失が200Pa以下であるものが好ましく、150Pa以下であるものがより好ましい。さらに、体積平均粒径が0.3〜0.5μmの範囲にある試験用粉体を5.3cm/秒の流速で接触させた場合における、当該粒子の捕集効率が90%以上であることが好ましく、99.97%以上であることがより好ましい。   The PTFE porous membrane 1 preferably has an average pore diameter of 0.01 to 5 μm and an average fiber diameter of 0.01 to 0.3 μm. Further, the area stretch ratio is preferably in the range of 300 to 750 times. Moreover, the thing whose pressure loss with respect to the air with a flow velocity of 5.3 cm / sec is 200 Pa or less is preferable, and what is 150 Pa or less is more preferable. Furthermore, when the test powder having a volume average particle size in the range of 0.3 to 0.5 μm is contacted at a flow rate of 5.3 cm / second, the collection efficiency of the particles is 90% or more. Is preferable, and it is more preferable that it is 99.97% or more.

このPTFE多孔質膜1は、公知の製法により得ることができる。例えば、PTFEシートを一軸延伸または二軸延伸して製造してもよい。PTFEシートは、一般に、PTFEファインパウダーに液状潤滑剤を加えたペースト状の混和物を予備成形し、予備成形体をペースト押し出し、圧延によりシート状に成形して作製される。なお、液状潤滑剤は、PTFEファインパウダーの表面を濡らすことができて抽出や加熱により除去できるものであれば特に制限されず、流動パラフィン、ナフサ、ホワイトオイルなどの炭化水素を用いればよい。液状潤滑剤の添加量は、PTFEファインパウダー100質量部に対して5〜50質量部が適当である。予備成形は、液状潤滑剤が絞り出されない程度の圧力で行えばよい。液状潤滑剤は、延伸するPTFEシートから予め除去しておくとよいが、延伸後に除去しても構わない。   This PTFE porous membrane 1 can be obtained by a known production method. For example, the PTFE sheet may be produced by uniaxial stretching or biaxial stretching. The PTFE sheet is generally produced by preforming a paste-like mixture obtained by adding a liquid lubricant to PTFE fine powder, extruding the preform, and forming the sheet into a sheet by rolling. The liquid lubricant is not particularly limited as long as it can wet the surface of the PTFE fine powder and can be removed by extraction or heating, and hydrocarbons such as liquid paraffin, naphtha, and white oil may be used. The addition amount of the liquid lubricant is suitably 5 to 50 parts by mass with respect to 100 parts by mass of the PTFE fine powder. The preforming may be performed at a pressure that does not squeeze out the liquid lubricant. The liquid lubricant may be removed from the stretched PTFE sheet in advance, but may be removed after stretching.

上記通気性支持材膜2は、フィルタ濾材の補強材として作用できる限り、その材料や構造は特に限定されない。材料としては、例えば、ポリエチレンやポリプロピレン等のポリオレフィン、ポリアミド、ポリエチレンテレフタレート等のポリエステル、芳香族ポリアミドを単独で、あるいはこれらを組み合わせて用いることができる。構造としては、例えば、フェルト、不織布、織布、メッシュ(網目状シート)等の構造とすることができるが、PTFE多孔質膜1に比して通気性に優れる構造とすることが好ましい。なお、強度、捕集性、柔軟性、取り扱いの容易さ等の側面からは、不織布状やメッシュ状とすることが好ましい。   The breathable support material film 2 is not particularly limited in its material and structure as long as it can act as a reinforcing material for the filter medium. As the material, for example, polyolefins such as polyethylene and polypropylene, polyesters such as polyamide and polyethylene terephthalate, and aromatic polyamides can be used alone or in combination. The structure may be, for example, a felt, a nonwoven fabric, a woven fabric, a mesh (mesh-like sheet), or the like, but preferably has a structure excellent in air permeability as compared with the PTFE porous membrane 1. In addition, it is preferable to use a nonwoven fabric or a mesh from the viewpoints of strength, catchability, flexibility, ease of handling, and the like.

また、この通気性支持材膜2は、必要に応じて着色、抗菌、防カビ、消臭、撥水、撥油、親水化などの処理を施してもよい。また、PTFE多孔質膜との接着性を向上させるために表面をコロナ処理してもよい。   In addition, the breathable support material film 2 may be subjected to treatments such as coloring, antibacterial, antifungal, deodorant, water repellent, oil repellent, and hydrophilization as necessary. Further, the surface may be corona-treated in order to improve the adhesion with the PTFE porous membrane.

上記PTFE多孔質膜1と通気性支持材膜2とは、単に重ね合わせるだけとしてもよいし、熱ラミネート、接着剤ラミネートなどの方法により複合化してもよい。具体的には、例えば、通気性支持材膜の原材料の融点およびPTFEの融点よりも低い融点を有するホットメルト剤(パウダーやウェブ)をPTFE多孔質膜と通気性支持材膜との間に介在させ、加熱によりそれぞれを接着する方法が挙げられる。通気性支持材膜の融点がPTFEの融点よりも低ければ、支持材の一部を溶融して複合化してもよい。PTFE多孔質膜と通気性支持材膜とを接着剤を用いて複合化する方法を用いてもよい。この場合、接着剤としては、2液混合型や熱による自己架橋型の接着剤などが適している。2液混合型としてはエポキシ樹脂、熱による自己架橋型としては酢酸ビニル−エチレン共重合体やエチレン−塩化ビニル共重合体などを用いればよい。   The PTFE porous membrane 1 and the breathable support material membrane 2 may be simply overlapped or may be combined by a method such as thermal lamination or adhesive lamination. Specifically, for example, a hot melt agent (powder or web) having a melting point lower than the melting point of the raw material of the breathable support material film and the PTFE is interposed between the PTFE porous film and the breathable support material film. And a method of bonding them by heating. If the melting point of the air-permeable support material film is lower than the melting point of PTFE, a part of the support material may be melted and combined. A method of combining the PTFE porous membrane and the breathable support material membrane with an adhesive may be used. In this case, a two-component mixed type adhesive or a self-crosslinking type adhesive by heat is suitable as the adhesive. An epoxy resin may be used as the two-component mixed type, and a vinyl acetate-ethylene copolymer or an ethylene-vinyl chloride copolymer may be used as the self-crosslinking type by heat.

上記掃除機用エアフィルタ濾材3の厚さは特に限定されないが、プリーツ加工後にその形状を維持できる程度の厚さを有していることが好ましい。例えば、0.05mm〜2mmの範囲とすることができる。また、その圧力損失は、20〜200Paであることが好ましく、20〜150Paであることがより好ましい。なお、この圧力損失は、5.3cm/秒の流速で空気を透過させて測定して得た値に基づいて規定される。また、体積平均粒径0.3〜0.5μmの試験用粉体を5.3cm/秒の流速で接触させた場合における、当該粒子の捕集効率が99.97%以上であることが好ましい。   The thickness of the air filter medium 3 for the vacuum cleaner is not particularly limited, but preferably has a thickness that can maintain the shape after pleating. For example, it can be in the range of 0.05 mm to 2 mm. Further, the pressure loss is preferably 20 to 200 Pa, and more preferably 20 to 150 Pa. The pressure loss is defined based on a value obtained by measuring air through a flow rate of 5.3 cm / second. Further, when the test powder having a volume average particle size of 0.3 to 0.5 μm is brought into contact at a flow rate of 5.3 cm / sec, the collection efficiency of the particles is preferably 99.97% or more. .

このようにして得られた掃除機用エアフィルタ濾材3は、図2で示すように、連続したW字状のひだ折り加工(以下「プリーツ加工」という)がなされ、PTFE多孔質膜1と通気性支持材膜2とが対向する面において互いに接触しないように、ホットメルト剤などでビードが形成され、さらに樹脂製や金属製の支持枠4などで枠付けされて掃除機用エアフィルタユニット5となる。   As shown in FIG. 2, the air filter medium 3 for a vacuum cleaner thus obtained is subjected to continuous W-shaped fold processing (hereinafter referred to as “pleating”), and the porous PTFE membrane 1 and the air vent. The bead is formed with a hot melt agent or the like so as not to come into contact with each other on the surface facing the conductive support material film 2, and is further framed with a support frame 4 made of resin or metal and the air filter unit 5 for a vacuum cleaner. It becomes.

上記プリーツ加工は、例えば、外周にブレードを配置した一対の回転ドラムを回転させながら濾材をひだ折りしていくロータリー方式、濾材の移送方向に所定の間隔をおいて配置した一対のブレードを移動させながら濾材を両面から交互に折り畳んでいくレシプロ方式などにより行うことができる。   In the pleating process, for example, a rotary method in which a pair of rotating drums having blades arranged on the outer periphery is rotated and a filter medium is folded, and a pair of blades arranged at a predetermined interval in the transfer direction of the filter medium is moved. However, it can be performed by a reciprocating method in which the filter medium is alternately folded from both sides.

支持枠内への掃除機用エアフィルタ濾材の担持性を高めるためには、樹脂製の支持枠を用いることが好ましい。インサート成型により、支持枠の樹脂を用いて支持枠とフィルタ濾材との間を強固にシールして、両者を一体化することができるためである。また、接着剤やシール材を必要としないため、フィルタユニットの構成材料数を削減できることも好ましい理由の1つである。   In order to improve the carrying property of the air filter medium for a cleaner in the support frame, it is preferable to use a resin support frame. This is because by insert molding, the resin of the support frame can be used to firmly seal the space between the support frame and the filter medium so that they can be integrated. Moreover, since an adhesive agent and a sealing material are not required, it is one of the preferable reasons that the number of constituent materials of the filter unit can be reduced.

上記掃除機用エアフィルタユニットの圧力損失は、20〜1000Paであることが好ましく、20〜500Paであることがより好ましい。1000Paを超えると掃除機の吸込力が低下してしまう。なお、この圧力損失は、2m3/分の流速で空気を透過させて測定して得た値に基づいて規定されるものである。 The pressure loss of the air filter unit for the vacuum cleaner is preferably 20 to 1000 Pa, and more preferably 20 to 500 Pa. If it exceeds 1000 Pa, the suction force of the vacuum cleaner will decrease. This pressure loss is defined based on a value obtained by measuring air permeation at a flow rate of 2 m 3 / min.

本発明の掃除機用エアフィルタ濾材は、図1に示すような、中央に一層のPTFE多孔質膜が配されるとともに、それを挟むようにして二層の通気性支持材膜がそれぞれ配されている構造に限らず、少なくとも一層のPTFE多孔質膜と、少なくとも一層の通気性支持材膜とを含む二層以上のフィルタ膜構造である限り、多種多様な構造をとることができる。例えば、一方の最外層にPTFE多孔質膜が配置されていてもよい。このようにPTFE多孔質膜が露出したフィルタ膜構造であると、粉塵を捕集する際に最上流側に当該PTFE多孔質膜を配することができるため、PTFEによる高い離形性をより積極的に活用して、捕集した粉塵のフィルタ濾材からの払い落とし性を高めることができる。他方、図1のようにPTFE多孔質膜を露出させず最外層に通気性支持材膜を配した構造とすると、フィルタ濾材の洗浄時にブラシ等で表面を擦ってもフィルタ性能が低下しにくくなるため、フィルタ濾材のメンテナンスが容易となる。   As shown in FIG. 1, the air filter medium for a vacuum cleaner of the present invention is provided with a single layer of PTFE porous membrane at the center and two layers of breathable support material membranes sandwiching it. Not only the structure, but also a wide variety of structures can be used as long as the filter film structure has two or more layers including at least one PTFE porous membrane and at least one breathable support material membrane. For example, a PTFE porous membrane may be disposed on one outermost layer. In this way, when the PTFE porous membrane is exposed, the PTFE porous membrane can be disposed on the most upstream side when collecting dust, so that the high release property by PTFE is more positive. It can be used effectively to improve the ability of the collected dust to be removed from the filter medium. On the other hand, when the structure is such that the porous PTFE membrane is not exposed as shown in FIG. 1 and the air-permeable support material membrane is disposed on the outermost layer, the filter performance is not easily lowered even if the surface is rubbed with a brush or the like when cleaning the filter media Therefore, maintenance of the filter medium becomes easy.

以下、実施例を用いて本発明をさらに具体的に説明するが、本発明はこれによって限定されるものではない。なお、圧力損失、捕集効率の測定は、以下に示す方法により行った。   Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited thereto. The pressure loss and the collection efficiency were measured by the following methods.

〔圧力損失〕
図3で示すように、サンプル(例えば、上記実施形態の掃除機用エアフィルタ濾材)を有効面積100cmの円形のホルダー6にセットした。ホルダー6の上流側と下流側とに圧力差を与え、空気の透過速度を流量計で5.3cm/秒に調整したときの圧力損失を圧力計(マノメーター)で測定した。測定は1サンプルにつき10箇所行い、各測定値の平均をサンプルの圧力損失とした。
[Pressure loss]
As shown in FIG. 3, a sample (for example, an air filter medium for a vacuum cleaner according to the above embodiment) was set in a circular holder 6 having an effective area of 100 cm 2 . A pressure difference was applied between the upstream side and the downstream side of the holder 6, and the pressure loss was measured with a pressure gauge (manometer) when the air permeation speed was adjusted to 5.3 cm / second with a flow meter. The measurement was performed at 10 locations per sample, and the average of each measurement value was taken as the pressure loss of the sample.

〔捕集効率〕
捕集効率とは、上述したように、上記式(1)で規定される値である。ここでさらに、各サンプルからの具体的な捕集効率の測定方法について以下に説明する。実施例の圧力損失の測定と同一の試験器7を用い、上流側にJIS試験用粉体の9種に規定されるタルクを供給し、PTFE多孔質膜に対して25g/mの割合で、かつ18.8cm/秒の流速にて接触するように調整した。上流側のタルク濃度とサンプルを透過してきた下流側のタルク濃度とをそれぞれパーティクルカウンターで測定し、以下の式(2)に基づいて捕集効率を求めた。
[Collection efficiency]
As described above, the collection efficiency is a value defined by the above formula (1). Here, a specific method for measuring the collection efficiency from each sample will be described below. Using the same tester 7 as the measurement of the pressure loss in the example, talc specified in nine kinds of powders for JIS test is supplied on the upstream side, at a rate of 25 g / m 2 with respect to the PTFE porous membrane. And at a flow rate of 18.8 cm / sec. The upstream talc concentration and the downstream talc concentration that had passed through the sample were measured with a particle counter, and the collection efficiency was determined based on the following equation (2).

捕集効率(%)=(1−下流側粒子濃度/上流側粒子濃度)×100 ・・・(2)     Collection efficiency (%) = (1−downstream particle concentration / upstream particle concentration) × 100 (2)

(実施例1)
PTFEファインパウダー(旭硝子フロロポリマーズ社製アフロンCD123)100質量部に対して液状潤滑剤(ドデカン)20質量部を均一に混合し、この混合物を予備成形し、次いでこれをペースト押出により丸棒状に成形した。さらに、この丸棒状成形体を一対の金属製圧延ロール間に通して、厚さ0.2mmのシート状成形体を得た。引き続き、このシート状成形体から、ノルマルデカンを用いた抽出法により液状潤滑剤を除去した。
Example 1
20 parts by mass of a liquid lubricant (dodecane) is uniformly mixed with 100 parts by mass of PTFE fine powder (Aflon CD123 manufactured by Asahi Glass Fluoropolymers Co., Ltd.), this mixture is preformed, and then formed into a round bar shape by paste extrusion. did. Further, this round bar-shaped molded body was passed between a pair of metal rolling rolls to obtain a sheet-shaped molded body having a thickness of 0.2 mm. Subsequently, the liquid lubricant was removed from the sheet-like molded body by an extraction method using normal decane.

このシート状成形体を2軸に延伸し、面積延伸倍率が600倍のPTFE多孔質膜(平均孔径1.1μm)を得た。このPTFE多孔質膜を挟み込むようにして、2枚のスパンボンド不織布(目付量30g/m2)を、ポリオレフィン系のホットメルト剤を介して重ね合わせた後、当該ホットメルト剤の融点よりも高い温度で加熱することによって、本実施例1にかかる三層構造の掃除機用エアフィルタ濾材(厚さ:0.3mm)を得た。 The sheet-like molded body was stretched biaxially to obtain a PTFE porous membrane (average pore diameter 1.1 μm) having an area stretch ratio of 600 times. Two spunbonded nonwoven fabrics (weight per unit area: 30 g / m 2 ) are overlapped via a polyolefin-based hot melt agent so as to sandwich the PTFE porous membrane, and then the melting point of the hot melt agent is higher. By heating at a temperature, a three-layer vacuum cleaner air filter medium (thickness: 0.3 mm) according to Example 1 was obtained.

(比較例1)
本比較例1は、エレクトレット化したポリプロピレン製の不繊布(目付量20g/m2)と、ポリエステル不織布(目付量130g/m2)とを、ポリオレフィン系のホットメルト剤を介して重ね合わせた後、ホットメルト剤の融点よりも高い温度で加熱することによって、二層構造の掃除機用エアフィルタ濾材(厚さ:0.42mm)を得た。なお、上記エレクトレット化とは、フィルタ繊維の一本毎に電荷を与えて永久分極させた誘電状態をいう。
(Comparative Example 1)
In Comparative Example 1, an electret polypropylene non-woven fabric (weight per unit area: 20 g / m 2 ) and a polyester non-woven fabric (weight per unit area: 130 g / m 2 ) were superposed through a polyolefin-based hot melt agent. The air filter medium (thickness: 0.42 mm) for a vacuum cleaner having a two-layer structure was obtained by heating at a temperature higher than the melting point of the hot melt agent. The electretization refers to a dielectric state in which each filter fiber is given a charge and is permanently polarized.

上記実施例1および比較例1にかかる掃除機用エアフィルタ濾材について、圧力損失および捕集効率を測定した。実施例1の圧力損失は150Pa、比較例1では30Paと、いずれも150Pa以下の優れた値を示した。また、実施例1の捕集効率は99.98%、比較例1では99.1%と、いずれも高い値を示し、下流側へのタルク粒子の噴き漏れが観察されなかった。   About the air filter medium for cleaners concerning the said Example 1 and the comparative example 1, the pressure loss and the collection efficiency were measured. The pressure loss of Example 1 was 150 Pa, and Comparative Example 1 was 30 Pa. Both showed excellent values of 150 Pa or less. In addition, the collection efficiency of Example 1 was 99.98% and that of Comparative Example 1 was 99.1%, both showing high values, and no talc particle jet leakage to the downstream side was observed.

ところが、タルクの捕集効率を測定したそれぞれのフィルタ濾材を流水で洗浄したところ、実施例1では、水洗によって、表面のPTFE多孔質膜からほとんどの粉塵を離形できた、すなわち粉塵をほとんど洗い流すことができたものの、比較例1では、かなりの粉塵がPTFE多孔質膜に残留した。   However, when each filter medium whose talc collection efficiency was measured was washed with running water, in Example 1, most of the dust could be removed from the porous PTFE membrane by washing with water, that is, almost all of the dust was washed away. However, in Comparative Example 1, considerable dust remained in the porous PTFE membrane.

さらに、それぞれのフィルタ濾材を、同様の条件で水洗した後、十分に風乾し、再度、試験器を用いて捕集試験を行ったところ、実施例1では、下流側へのタルク粒子の噴き漏れは観察されなかったが、比較例1では、フィルタとしての使用が困難な程度にまでタルク粉末の噴き漏れが顕著に発生した。   Furthermore, after each filter medium was washed with water under the same conditions, it was sufficiently air-dried, and a collection test was performed again using a tester. In Example 1, talc particles were leaked to the downstream side. However, in Comparative Example 1, talc powder spilled significantly to the extent that it was difficult to use as a filter.

なお、実施例1にかかる掃除機用エアフィルタ濾材を、120mm×120mmの範囲に山高さ20mmの山部が18箇所形成されるようにプリーツ加工した後、インサート成型によって樹脂製の支持枠を溶着させた掃除機用エアフィルタユニットを作製したところ、上述のような優れた耐洗浄性および塵離れ性が発揮されることを確認した。   The air filter medium for a vacuum cleaner according to Example 1 was pleated so that 18 ridges with a height of 20 mm were formed in a range of 120 mm × 120 mm, and a resin support frame was welded by insert molding. When the vacuum filter air filter unit was produced, it was confirmed that the excellent cleaning resistance and dust separation performance as described above were exhibited.

本発明は、塵離れが良く、かつ洗浄してもその捕集効率が低下しにくい掃除機用エアフィルタ濾材、および、このフィルタ濾材を用いた掃除機用エアフィルタユニットにも適用できる。   The present invention can also be applied to an air filter medium for a vacuum cleaner that has good dust separation and whose collection efficiency is less likely to decrease even when washed, and an air filter unit for a vacuum cleaner that uses this filter medium.

本発明の掃除機用エアフィルタ濾材の一例を示す断面図である。It is sectional drawing which shows an example of the air filter medium for vacuum cleaners of this invention. 本発明の掃除機用エアフィルタユニットの一例を示す斜視図である。It is a perspective view which shows an example of the air filter unit for vacuum cleaners of this invention. 捕集効率の測定に用いる試験器を示す図である。It is a figure which shows the test device used for the measurement of collection efficiency.

符号の説明Explanation of symbols

1 PTFE多孔質膜
2 通気性支持材膜
3 掃除機用エアフィルタ濾材
4 支持枠
5 掃除機用エアフィルタユニット
6 ホルダー
7 試験器
DESCRIPTION OF SYMBOLS 1 PTFE porous film 2 Breathable support material film 3 Air filter medium for vacuum cleaner 4 Support frame 5 Air filter unit for vacuum cleaner 6 Holder 7 Tester

Claims (2)

少なくとも一層のポリテトラフルオロエチレン多孔質膜と、少なくとも一層の通気性支持材膜とを含み、
粒径が0.3〜0.5μmの範囲にある試験用粉体を5.3cm/秒の流速で接触させた場合の、当該試験用粉体の捕集効率が99.97%以上の範囲にある
ことを特徴とする掃除機用エアフィルタ濾材。
Comprising at least one polytetrafluoroethylene porous membrane and at least one breathable support membrane,
When the test powder having a particle size of 0.3 to 0.5 μm is contacted at a flow rate of 5.3 cm / sec, the collection efficiency of the test powder is 99.97% or more. An air filter medium for a vacuum cleaner.
請求項1に記載の掃除機用エアフィルタ濾材と、前記掃除機用エアフィルタ濾材を担持する支持枠とを含む掃除機用エアフィルタユニットであって、
前記掃除機用エアフィルタ濾材が、少なくとも一部の断面形状がW字状となるようにプリーツ加工されており、かつインサート成型によって前記支持枠内に担持されている
ことを特徴とする掃除機用エアフィルタユニット。
An air filter unit for a vacuum cleaner comprising the air filter medium for a vacuum cleaner according to claim 1 and a support frame carrying the air filter medium for the vacuum cleaner,
The vacuum filter air filter medium is pleated so that at least a part of the cross-sectional shape is W-shaped, and is carried in the support frame by insert molding. Air filter unit.
JP2005176417A 2005-06-16 2005-06-16 Air filter medium for cleaner and air filter unit for cleaner Pending JP2006346174A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008284510A (en) * 2007-05-21 2008-11-27 Nitto Denko Corp Filter unit and manufacturing method thereof
JP2011105895A (en) * 2009-11-20 2011-06-02 Nitto Denko Corp Method for producing polytetrafluoroethylene porous film, filter medium, and filter unit for dust collector
CN111397935A (en) * 2020-04-03 2020-07-10 中国北方车辆研究所 Air filter performance test bench for simulating plateau air intake
WO2024042409A1 (en) * 2022-08-26 2024-02-29 Dyson Technology Limited Filter media

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002273126A (en) * 2001-03-16 2002-09-24 Nitto Denko Corp Filter medium for air filter and method for manufacturing the same
JP2002306380A (en) * 2001-04-16 2002-10-22 Matsushita Electric Ind Co Ltd Vacuum cleaner
JP2003519520A (en) * 2000-01-13 2003-06-24 ロイヤル アプライアンス マニファクチュアリング カンパニー Upright vacuum cleaner with cyclone airflow path
JP2004188355A (en) * 2002-12-12 2004-07-08 Nitto Denko Corp Filtering material for air filter, its using method, air filter unit, and air permeable supporting material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003519520A (en) * 2000-01-13 2003-06-24 ロイヤル アプライアンス マニファクチュアリング カンパニー Upright vacuum cleaner with cyclone airflow path
JP2002273126A (en) * 2001-03-16 2002-09-24 Nitto Denko Corp Filter medium for air filter and method for manufacturing the same
JP2002306380A (en) * 2001-04-16 2002-10-22 Matsushita Electric Ind Co Ltd Vacuum cleaner
JP2004188355A (en) * 2002-12-12 2004-07-08 Nitto Denko Corp Filtering material for air filter, its using method, air filter unit, and air permeable supporting material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008284510A (en) * 2007-05-21 2008-11-27 Nitto Denko Corp Filter unit and manufacturing method thereof
JP2011105895A (en) * 2009-11-20 2011-06-02 Nitto Denko Corp Method for producing polytetrafluoroethylene porous film, filter medium, and filter unit for dust collector
CN111397935A (en) * 2020-04-03 2020-07-10 中国北方车辆研究所 Air filter performance test bench for simulating plateau air intake
CN111397935B (en) * 2020-04-03 2021-09-10 中国北方车辆研究所 Air filter performance test bench for simulating plateau air intake
WO2024042409A1 (en) * 2022-08-26 2024-02-29 Dyson Technology Limited Filter media

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