JP2000042323A - Filter material for air filter and air filter - Google Patents
Filter material for air filter and air filterInfo
- Publication number
- JP2000042323A JP2000042323A JP10216584A JP21658498A JP2000042323A JP 2000042323 A JP2000042323 A JP 2000042323A JP 10216584 A JP10216584 A JP 10216584A JP 21658498 A JP21658498 A JP 21658498A JP 2000042323 A JP2000042323 A JP 2000042323A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- density layer
- dust
- density
- 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)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、少なくとも２層以上の
密度勾配型乾式不織布から成るエアフィルタ用ろ材であ
って、特に微塵の飛散（捕集されずにフィルタを通過す
る現象）と再発塵（捕集され粉塵がフィルタから脱落、
飛散する現象）を防止するのに好適なエアフィルタ用ろ
材及びエアフィルタの改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter medium for an air filter comprising at least two layers of a density gradient type dry non-woven fabric, and particularly to scattering of fine dust (phenomenon of passing through the filter without being collected) and reoccurrence of dust. (Dust is collected and dust falls off the filter,
The present invention relates to an improvement of a filter medium for an air filter and an air filter suitable for preventing the phenomenon of scattering.
【０００２】[0002]
【従来の技術】この種密度勾配型乾式不織布から成るろ
材は、空気流入側から空気流出側に対して、構成繊維の
種類、繊維径、繊維接着剤量を変化させて、見掛け密度
を変化させた少なくとも２層以上の繊維層を密度勾配を
有するように積層したものである。そして、このろ材
は、比較的粗大な粉塵を低密度層（２層構造では低密度
層、３層以上の構造では低密度層及び中間層、以下単に
低密度層という）で捕集し、比較的微細な粉塵を高密度
層で捕集して、広い範囲の粒径分布を有する粉塵を効率
的に捕集するようになしたものである。2. Description of the Related Art A filter medium composed of a seed density gradient type dry nonwoven fabric changes the apparent density by changing the type of constituent fibers, the fiber diameter and the amount of fiber adhesive from the air inflow side to the air outflow side. In addition, at least two or more fiber layers are laminated so as to have a density gradient. The filter medium collects relatively coarse dust in a low-density layer (a low-density layer in a two-layer structure, a low-density layer and an intermediate layer in a structure having three or more layers, and hereinafter simply referred to as a low-density layer). The fine dust is collected in a high-density layer, and the dust having a wide range of particle size distribution is efficiently collected.
【０００３】ところが、この種密度勾配型ろ材を用いた
エアフィルタでは、２μｍ以上の比較的粗大な粉塵に対
しては、前記のように、低密度層がプレフィルタとして
の機能を発揮して十分な捕集効率が得られるが、次の問
題がある。However, in an air filter using this kind of gradient filter medium, as described above, the low-density layer sufficiently functions as a pre-filter for relatively coarse dust of 2 μm or more. Although high collection efficiency can be obtained, there are the following problems.
【０００４】 ２μｍ未満の粉塵（以下、微塵とい
う）に対しては、低密度層がプレフィルタとしての機能
を発揮しないため、微塵の捕集効率が低く、微塵の飛散
が避けられない。 粉塵保持容量の増大に伴って、特に高密度層で捕集
された微塵の物理的保持が困難になるため、フィルタフ
ァンから伝導する機械的振動によって再発塵が発生す
る。With respect to dust having a particle size of less than 2 μm (hereinafter referred to as “fine dust”), the low-density layer does not function as a pre-filter, so that the efficiency of collecting fine dust is low and scattering of fine dust is inevitable. With the increase in the dust holding capacity, it becomes difficult to physically hold the fine dust collected particularly in the high-density layer, so that the mechanical vibration transmitted from the filter fan causes the dust to recur.
【０００５】これらの微塵の飛散や再発塵は、居住環境
や作業環境を悪化し、特に塗装ブースにおいては塗装中
の製品に付着して製品の品質低下の一因になっていた。[0005] The scattering of these fine dusts and the reoccurrence of dusts deteriorate the living environment and working environment, and in particular, adhere to products being coated in a painting booth, causing a deterioration in product quality.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、低密度層か
ら高密度層へと密度勾配を有した、少なくとも２層以上
の繊維層から成るエアフィルタ用ろ材において、微塵を
確実に内部濾過して飛散や再発塵を防止すると共に、ろ
材性能（粉塵捕集率・圧力損失・粉塵保持容量）を向上
することを課題とする。SUMMARY OF THE INVENTION An object of the present invention is to provide an air filter medium having at least two fiber layers having a density gradient from a low density layer to a high density layer. It is an object of the present invention to prevent scattering and recurrence of dust, and to improve filter media performance (dust collection rate, pressure loss, dust holding capacity).
【０００７】[0007]
【課題を解決するための手段】本発明の第１の発明であ
るろ材は、上記高密度層の主として最上部分に、粘着性
を有する水系熱可塑性樹脂からなる多孔質膜状の粘着部
を設けて成る。According to a first aspect of the present invention, there is provided a filter medium having a porous film-shaped adhesive portion made of an aqueous thermoplastic resin having an adhesive property, mainly at the uppermost portion of the high-density layer. Consisting of
【０００８】また、第２の発明であるエアフィルタは、
上記ろ材を、高密度層が空気流出側になるように、木、
金属、合成樹脂、紙等で以て所定形状に成型した枠体に
取付けて成る。An air filter according to a second aspect of the present invention includes:
The above-mentioned filter medium is made of wood, so that the high density layer is on the air outflow side.
It is attached to a frame formed into a predetermined shape with metal, synthetic resin, paper or the like.
【０００９】ここで、「高密度層の主として最上部分」
とは、高密度層の最上部分だけでなく、この最上部分を
含むこれと隣接する層（低密度層又は中間層）との境界
部分を意味する。Here, "mainly the uppermost portion of the high-density layer"
The term means not only the uppermost portion of the high-density layer but also the boundary portion between the layer and the adjacent layer (low-density layer or intermediate layer) including the uppermost portion.
【００１０】また、「多孔質膜状の粘着部」とは、粘着
性を有する水系熱可塑性樹脂が、上記最上部分の三次元
交絡繊維中において比較的密に交絡した繊維間に表面張
力によって水掻き状に付着した膜部分と、比較的粗に交
絡した繊維の表面のみに付着した空隙部分とが無数に点
在した状態を意味する。[0010] The "porous film-like adhesive portion" means that a water-based thermoplastic resin having adhesiveness is used as a web by the surface tension between relatively densely entangled fibers in the uppermost three-dimensional entangled fibers. This means a state in which countless film portions adhering in a shape and void portions adhering only to the surface of fibers relatively entangled innumerably are scattered.
【００１１】この手段によれば、高密度層の主として最
上部分に多孔質膜状の粘着部が形成されているから、こ
の粘着部が微塵に対してプレフィルタとしての機能を発
揮して、空気は初期圧損の急激な上昇を伴うことなく通
過し、低密度層を通過した微塵は粘着部で以て確実に捕
集され、粘着部を通過した微塵も高密度層で以て確実に
捕集される。According to this means, since the porous film-like adhesive portion is formed mainly on the uppermost portion of the high-density layer, the adhesive portion functions as a pre-filter against fine dust, and is provided with air. Passes without a sharp rise in the initial pressure loss, fine dust that has passed through the low-density layer is reliably collected by the adhesive section, and fine dust that has passed through the adhesive section is reliably collected by the high-density layer. Is done.
【００１２】ここで、「微塵に対してプレフィルタとし
て機能する」とは、高密度層の主として最上部分が低密
度層を通過した微塵を捕集することを意味し、具体的に
は高密度層の主として最上部分に形成した多孔質膜状の
粘着部によって達成することができる。Here, "functioning as a pre-filter for fine dust" means that mainly the uppermost portion of the high-density layer collects fine dust that has passed through the low-density layer. This can be achieved by a porous film-like adhesive portion formed mainly on the uppermost portion of the layer.
【００１３】この発明において、上記粘着部の厚みは、
０．５ｍｍ未満であると微塵の捕集には不十分であり、
２ｍｍを越えると早く目が詰まって圧力損失の上昇が早
期に生じて好ましくないから、その範囲としては、０．
５〜２ｍｍが好適であり、より好ましくは１〜１．５ｍ
ｍである。In the present invention, the thickness of the adhesive portion is
If it is less than 0.5 mm, it is insufficient for collecting fine dust,
If it exceeds 2 mm, the eyes are clogged quickly and the pressure loss rises early, which is not preferable.
5 to 2 mm is suitable, more preferably 1 to 1.5 m
m.
【００１４】ところで、従来技術において、微塵の捕集
効率を上げるために、高密度層に用いる繊維接着剤の量
を多くしたり、構成繊維の繊維径を細くしたりして、高
密度層の見掛け密度を高くしたものもある。しかし、高
密度層とこれと隣接する層（低密度層又は中間層）との
見掛け密度の差を大きくすると、低密度層が前記のよう
に微塵に対してプレフィルタとしての機能を発揮しない
から、高密度層が早期に目詰まりして、圧力損失が急激
に高まる。よって、エアフィルタとしての寿命を短くす
る一因になるから、上記見掛け密度の差を大きくして内
部濾過体積を大きくするするにも限界があった。By the way, in the prior art, in order to increase the collection efficiency of fine dust, the amount of the fiber adhesive used for the high-density layer is increased, or the diameter of the constituent fibers is reduced, so that the density of the high-density layer is reduced. Some have higher apparent density. However, if the difference in apparent density between the high-density layer and the adjacent layer (low-density layer or intermediate layer) is increased, the low-density layer does not function as a pre-filter against fine dust as described above. As a result, the high-density layer is clogged at an early stage, and the pressure loss rapidly increases. Therefore, since this contributes to shortening the life of the air filter, there is a limit to increasing the difference in apparent density and increasing the internal filtration volume.
【００１５】これに対して、本発明によるときは、粘着
部が微塵に対してプレフィルタとしての機能を発揮する
から、上記見掛け密度の差を大きくして、内部濾過体積
を大にして、粉塵保持容量を増大することができる。On the other hand, according to the present invention, since the adhesive portion functions as a pre-filter for fine dust, the difference in the apparent density is increased, the internal filtration volume is increased, and the dust is reduced. The storage capacity can be increased.
【００１６】ところで、本発明において、高密度層の見
掛け密度を０．０１０〜０．０１３ｇ／ｃｍ3 、低密度
層の見掛け密度を０．０１２〜０．０１４ｇ／ｃｍ3 の
範囲にすると、内部濾過体積が大きくなり、粉塵保持容
量の点から好ましい。In the present invention, if the apparent density of the high density layer is in the range of 0.010 to 0.013 g / cm 3 and the low density layer is in the range of 0.012 to 0.014 g / cm 3 , The filtration volume is large, which is preferable from the viewpoint of the dust holding capacity.
【００１７】[0017]
【発明の実施の形態】発明の実施の形態を図面を参照し
て説明する。Embodiments of the present invention will be described with reference to the drawings.
【００１８】図１において、Ｆは、高密度層１、粘着部
２及び低密度層３から成るろ材である。上記粘着部２
は、粘着性を有する水系熱可塑性樹脂４を高密度層１の
主として最上部分の構成繊維５の表面及び構成繊維５間
に付着して、無数の膜部分ａと空隙部分ｂとから成る多
孔質膜状に形成したものである。In FIG. 1, F is a filter medium composed of a high-density layer 1, an adhesive portion 2, and a low-density layer 3. Adhesive part 2
Is a method in which a water-based thermoplastic resin 4 having an adhesive property is adhered mainly to the surface of the uppermost constituent fiber 5 of the high-density layer 1 and between the constituent fibers 5 to form a porous film composed of countless membrane portions a and void portions b. It is formed in a film shape.
【００１９】ところで、ろ材を構成する繊維としては、
ポリエステル繊維、ナイロン繊維、ポリプロピレン繊
維、ポリエチレン繊維、ビニロン繊維、レーヨン繊維等
の化学繊維を単独で又はこれらの化学繊維から選択した
２種以上を混合して用いることができる。By the way, as the fiber constituting the filter medium,
Chemical fibers such as polyester fiber, nylon fiber, polypropylene fiber, polyethylene fiber, vinylon fiber and rayon fiber can be used alone or as a mixture of two or more selected from these chemical fibers.
【００２０】また、粘着部２を構成する水系熱可塑性樹
脂としては、乾燥時においても粘着性を有するアクリル
系、ビニルエーテル系又はゴム系のものが好ましく、よ
り具体的には、アクリル系として、ブチルアクリレー
ト、オクチルアクリレート等、ビニルエーテル系とし
て、ビニルエチルエーテル、ビニルブチルエーテル、ビ
ニルイソブチルエーテル等、ゴム系として、ＳＢＲ系、
ＳＢＳ系、ＳＩＳ系の各ブロック共重合体を用いること
ができる。The water-based thermoplastic resin constituting the adhesive portion 2 is preferably an acrylic, vinyl ether, or rubber-based resin having an adhesive property even when dried. Acrylate, octyl acrylate, etc., as vinyl ethers, vinyl ethyl ether, vinyl butyl ether, vinyl isobutyl ether, etc., as rubbers, SBR,
SBS-based and SIS-based block copolymers can be used.
【００２１】上記多孔質膜状の粘着部は、次の方法によ
って形成することができる。まず、少なくとも２層以上
の繊維層を密度勾配を有するように積層した乾式不織布
を、粘着性を有する水系熱可塑性樹脂溶液に含浸する。
その後乾燥して、この乾燥時の水の蒸発に伴って、高密
度層側に沈降した水系熱可塑性樹脂の移行（マイグレー
ション）を発生させる。すなわち、水系熱可塑性樹脂は
水分の蒸発に伴って高密度層の構成繊維に沿って高密度
層の最上部分に移行し、高密度層と隣接する層との密度
差によって停止する。よって、移行した水系熱可塑性樹
脂は、繊維が比較的密に交絡した部分には、表面張力で
もって水掻き状に付着して膜部分となり、繊維が比較的
粗に交絡した部分には、繊維表面のみに付着して繊維間
空隙のままで残存した空隙部分となって、多孔質膜状の
粘着部を形成する。The above-mentioned porous film-shaped adhesive portion can be formed by the following method. First, a dry nonwoven fabric in which at least two or more fiber layers are laminated so as to have a density gradient is impregnated with an aqueous thermoplastic resin solution having tackiness.
Thereafter, the resin is dried, and migration of the water-based thermoplastic resin that has settled on the high-density layer side occurs with the evaporation of water during the drying. That is, the water-based thermoplastic resin moves to the uppermost portion of the high-density layer along with the constituent fibers of the high-density layer as the water evaporates, and stops due to the density difference between the high-density layer and the adjacent layer. Therefore, the transferred aqueous thermoplastic resin is attached to the portion where the fibers are relatively entangled in a web-like manner with surface tension and becomes a membrane portion, and the portion where the fibers are relatively entangled is the fiber surface. It adheres only to the voids and remains as voids between fibers to form a porous membrane-like adhesive portion.
【００２２】上記ろ材は、木、金属、合成樹脂、紙等か
ら成る枠体に、高密度層が空気流出側になるように装着
して、所望のエアフィルタを形成することができる。The filter medium can be mounted on a frame made of wood, metal, synthetic resin, paper, or the like so that the high-density layer is on the air outflow side to form a desired air filter.
【００２３】[0023]
【実施例】高密度層として、ポリエステル繊維１．５ｄ
×５１ｍｍ６０％と、レーヨン繊維３ｄ×５１ｍｍ１０
％と、熱融着性繊維４ｄ×５１ｍ３０％とを混綿して繊
維目付６０ｇ／ｍ2 ，厚み５〜６ｍｍ，見掛け密度０．
０１０ｇ／ｃｍ3 の高密度繊維ウェブを形成した。EXAMPLE As a high-density layer, 1.5 d of polyester fiber was used.
× 51mm60%, rayon fiber 3d × 51mm10
% And a heat-fusible fiber of 4d × 51m30%, and a fiber weight of 60 g / m 2 , a thickness of 5 to 6 mm, and an apparent density of 0.
A high density fibrous web of 010 g / cm 3 was formed.
【００２４】また、低密度層として、ポリエステル繊維
６ｄ×５１ｍｍ４０％と、ポリエステル繊維１３ｄ×５
１ｍｍ１０％と、レーヨン繊維３ｄ×５１ｍｍ１０％
と、熱融着性繊維４ｄ×５１ｍ４０％とを混綿して繊維
目付１９０ｇ／ｍ2 ，厚み１５〜１６ｍｍ，見掛け密度
０．０１３ｇ／ｃｍ3 の低密度繊維ウェブを形成した。As the low-density layer, polyester fiber 6d × 51 mm 40% and polyester fiber 13d × 5
1mm10% and rayon fiber 3d × 51mm10%
And a heat-fusible fiber of 4d × 51m40% to form a low-density fiber web having a basis weight of 190 g / m 2 , a thickness of 15 to 16 mm, and an apparent density of 0.013 g / cm 3 .
【００２５】次に、上記高密度繊維ウェブと低密度繊維
ウェブとを積層して、上下のエンドレス金網に挟んで１
５０℃で２分間乾燥して、ウェブ中の熱融着性繊維で以
て繊維交点を接着させた積層ウェブを形成した。その
後、上記積層ウェブに下記配合の難燃処理剤のスプレー
加工を施して１５０℃×５分間乾燥して難燃樹脂加工積
層ウェブを形成した。Next, the high-density fiber web and the low-density fiber web are laminated and sandwiched between upper and lower endless wire meshes.
Dried at 50 ° C. for 2 minutes to form a laminated web with the fiber intersections bonded with the heat fusible fibers in the web. Thereafter, the above laminated web was sprayed with a flame retardant having the following composition, and dried at 150 ° C. for 5 minutes to form a flame retardant resin processed laminated web.
【００２６】 固形比 塩化ビニル樹脂 １００部 五酸化アンチモン ４０部 水 全固形濃度 ２０％Solid ratio Vinyl chloride resin 100 parts Antimony pentoxide 40 parts Water Total solid concentration 20%
【００２７】次に、上記難燃樹脂加工積層ウェブを、ア
クリル系粘着剤１００部と水とを全固形分濃度２０％に
調整した液に含浸し、１４０〜１５０℃で５〜６分間乾
燥して水の蒸発に伴い、アクリル系粘着剤が高密度層の
主として最上部分に移行して厚み１．２ｍｍの多孔質膜
状の粘着部を形成して、この粘着部で以て低密度層との
境界部分を有する所望のエアフィルタ用ろ材を作製し
た。このろ材は、乾燥樹脂分１８％、製品目付３０５ｇ
／ｍ2 であった。Next, the flame-retardant resin-processed laminated web is impregnated with a liquid prepared by adjusting 100 parts of an acrylic pressure-sensitive adhesive and water to a total solid concentration of 20%, and dried at 140 to 150 ° C. for 5 to 6 minutes. As the water evaporates, the acrylic pressure-sensitive adhesive migrates mainly to the uppermost portion of the high-density layer to form a 1.2 mm-thick porous film-shaped pressure-sensitive adhesive portion. A desired filter medium for an air filter having a boundary portion was prepared. This filter material has a dry resin content of 18% and a product weight of 305 g.
/ M 2 .
【００２８】この場合において、粘着部の厚みは、１．
２ｍｍであるが、粘着剤の固形分濃度や乾燥条件を変化
させることにより、０．５〜２ｍｍの範囲で調整するこ
とができる。In this case, the thickness of the adhesive portion is as follows.
It is 2 mm, but can be adjusted in the range of 0.5 to 2 mm by changing the solid content concentration of the adhesive and the drying conditions.
【００２９】（比較例）ポリエステル繊維１．５ｄ×５
１ｍｍ６０％と、レーヨン繊維３ｄ×５１ｍｍ１０％
と、熱融着性繊維４ｄ×５１ｍ３０％とを混綿して、ウ
ェブ目付４０ｇ／ｍ2 ，厚み５〜６ｍｍ，見掛け密度
０．０１０ｇ／ｃｍ3 の高密度繊維ウェブを形成した。
またポリエステル繊維６ｄ×５１ｍｍ４０％と、ポリエ
ステル繊維１３ｄ×５１ｍｍ１０％と、レーヨン繊維３
ｄ×５１ｍｍ１０％と、熱融着性繊維４ｄ×５１ｍ４０
％とを混綿して目付２１０ｇ／ｍ2 ，厚み１５〜１６ｍ
ｍ，見掛け密度０．０１３ｇ／ｃｍ3 の低密度繊維ウェ
ブとして形成した。(Comparative Example) 1.5 d × 5 polyester fiber
1mm60%, rayon fiber 3d × 51mm10%
If, and cotton mixing and 51M30% heat fusible fibers 4d ×, web basis weight 40 g / m 2, thickness 5 to 6 mm, to form a densified fibrous web apparent density 0.010 g / cm 3.
The polyester fiber 6d × 51 mm 40%, the polyester fiber 13d × 51 mm 10%, and the rayon fiber 3
d × 51 mm 10% and heat-fusible fiber 4d × 51 m40
% And a basis weight of 210 g / m 2 and a thickness of 15 to 16 m
m, a low density fiber web having an apparent density of 0.013 g / cm 3 .
【００３０】次に、上記高密度繊維ウェブと低密度繊維
ウェブとを積層して、上下のエンドレス金網に挟んで１
５０℃で２分間乾燥して、ウェブ中の熱融着性繊維で以
て繊維交点を接着させた積層ウェブを形成した。その
後、上記積層ウェブに下記配合の難燃処理剤のスプレー
加工を施して１５０℃×５分間乾燥して難燃樹脂加工積
層不織布からなるろ材を作製した。このろ材は、乾燥樹
脂分１４％、製品目付２９０ｇ／ｍ2 であった。Next, the high-density fiber web and the low-density fiber web are laminated and sandwiched between upper and lower endless wire meshes.
Dried at 50 ° C. for 2 minutes to form a laminated web with the fiber intersections bonded with the heat fusible fibers in the web. Thereafter, the laminated web was sprayed with a flame retardant having the following composition and dried at 150 ° C. for 5 minutes to prepare a filter medium made of a laminated nonwoven fabric processed with a flame retardant resin. This filter medium had a dry resin content of 14% and a product weight of 290 g / m 2 .
【００３１】上記実施例及び比較例のろ材を用いて、金
属製の枠体に取付けてエアフィルタを作製し、ＪＩＳ−
Ｂ−９９０８形式３（重量法）に基づき性能測定を実施
したところ表１の結果を得た。なお、定格圧損の上限値
を４０ｍｍＡｑとし、測定機のファンスイッチを１０回
ＯＮ−ＯＦＦを繰り返すことで、エアフィルタに機械的
振動を与えて、エアフィルタから脱落した粉塵量を測定
した。Using the filter media of the above Examples and Comparative Examples, an air filter was prepared by attaching the filter to a metal frame.
When the performance was measured based on B-9908 format 3 (weight method), the results shown in Table 1 were obtained. The upper limit of the rated pressure loss was set at 40 mmAq, and the fan switch of the measuring instrument was repeatedly turned on and off ten times, thereby giving mechanical vibration to the air filter and measuring the amount of dust dropped from the air filter.
【００３２】[0032]
【表１】 [Table 1]
【００３３】表１から明らかなように、実施例品は、比
較例品に比較して、再発塵量において激減し、また初期
圧損が１６％低下し、さらに粉塵保持容量量が２０ｇ／
ｍ2向上した。また、粒径別の粉塵捕集率においては、
粒径５μｍ以下のダストに対して向上し、２μｍ未満の
ダストに対しては４０％以上も向上し、微塵の飛散に対
して効果があることが判明した。As can be seen from Table 1, the product of the example has a drastic decrease in the amount of regenerated dust, a reduction of the initial pressure loss of 16%, and a dust holding capacity of 20 g / g, as compared with the product of the comparative example.
m 2 was improved. Also, in the dust collection rate by particle size,
It was found that dust particles having a particle size of 5 μm or less were improved, and dust particles having a particle size of less than 2 μm were improved by 40% or more, which was effective for scattering fine dust.
【００３４】ところで、上記実施例は二層構造のもので
あるが、高密度、中密度、低密度と順次密度勾配にした
三層以上の構造にすることもある。Although the above embodiment has a two-layer structure, it may have a three or more-layer structure in which the density gradient is sequentially changed to high density, medium density, and low density.
【００３５】本発明において、高密度層とこれと隣接す
る低密度層との見掛け密度の差を調整することにより、
内部濾過体積を大にして、粉塵保持容量をより一層増大
することができる。In the present invention, by adjusting the difference in apparent density between the high-density layer and the adjacent low-density layer,
By increasing the internal filtration volume, the dust holding capacity can be further increased.
【００３６】[0036]
【発明の効果】本発明によれば、高密度層の主として最
上部分の粘着部がプレフィルタの機能を発揮して、低密
度層を通過した微塵を確実に捕集することができるか
ら、微塵の飛散を防止することができ、かつ機械的振動
に起因する微塵の再発塵を大幅に減少することができ
る。According to the present invention, the adhesive portion mainly at the uppermost portion of the high-density layer exhibits the function of a pre-filter, so that fine dust passing through the low-density layer can be reliably collected. Can be prevented, and recurrent dust due to mechanical vibration can be significantly reduced.
【００３７】また、粘着部が無数に点在した膜部分と空
隙部分とから成る多孔質膜状に形成されているから、空
気の通過には支障がなく、圧力損失の急激な上昇を生ず
ることなく、粉塵保集率や粉塵保持容量を向上すること
ができ、エアフィルタとしての寿命を延長することがで
きる。Further, since the adhesive portion is formed in the form of a porous film composed of an infinite number of film portions and void portions, there is no obstacle to the passage of air and a sudden increase in pressure loss occurs. In addition, the dust collection rate and the dust holding capacity can be improved, and the life as an air filter can be extended.
【図１】本発明のろ材の一実施例を示す概略構成図であ
る。FIG. 1 is a schematic configuration diagram showing one embodiment of a filter medium of the present invention.
【図２】本発明のろ材の一実施例を示す要部模式図であ
る。FIG. 2 is a schematic view of a main part showing one embodiment of a filter medium of the present invention.
Ｆ・・・ろ材 ａ・・・膜部分 ｂ・・・空隙部分 １・・・高密度層 ２・・・粘着部 ３・・・低密度層 ４・・・水系熱可塑性樹脂 ５・・・高密度層の構成繊維 F: Filter medium a: Membrane part b: Void part 1 ... High density layer 2 ... Adhesive part 3 ... Low density layer 4 ... Water-based thermoplastic resin 5 ... High Constituent fiber of density layer
Claims (3)
した、少なくとも２層以上の繊維層から成るエアフィル
タ用ろ材であって、上記高密度層の主として最上部分
に、粘着性を有する水系熱可塑性樹脂からなる多孔質膜
状の粘着部が設けられたことを特徴とするエアフィルタ
用ろ材。An air filter medium having at least two or more fiber layers having a density gradient from a low-density layer to a high-density layer. A filter medium for an air filter, comprising a porous film-shaped adhesive portion made of an aqueous thermoplastic resin.
請求項１に記載のエアフィルタ用ろ材。2. The air filter medium according to claim 1, wherein the thickness of the adhesive portion is 0.5 to 2 mm.
層が空気流出側になるように枠体に取付けたエアフィル
タ。3. An air filter, wherein the filter medium according to claim 1 is attached to a frame such that a high-density layer is on an air outflow side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21658498A JP3968613B2 (en) | 1998-07-31 | 1998-07-31 | Air filter media and air filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21658498A JP3968613B2 (en) | 1998-07-31 | 1998-07-31 | Air filter media and air filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000042323A true JP2000042323A (en) | 2000-02-15 |
| JP3968613B2 JP3968613B2 (en) | 2007-08-29 |
Family
ID=16690717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21658498A Expired - Fee Related JP3968613B2 (en) | 1998-07-31 | 1998-07-31 | Air filter media and air filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3968613B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100405318B1 (en) * | 2000-11-20 | 2003-11-12 | 한국바이린주식회사 | Engine intake air filtering and It's Manufacturing method |
| WO2006025249A1 (en) * | 2004-08-30 | 2006-03-09 | Toshiba Tec Kabushiki Kaisha | Electric cleaner |
| JP2007125416A (en) * | 2007-01-05 | 2007-05-24 | Hitachi Appliances Inc | Vacuum cleaner |
| JP2008029972A (en) * | 2006-07-31 | 2008-02-14 | Kowa Co Ltd | Filter for adsorbing dust and the like |
| JP2008080275A (en) * | 2006-09-28 | 2008-04-10 | Japan Vilene Co Ltd | Filter medium for particulate removal |
| JP2010255612A (en) * | 2009-04-28 | 2010-11-11 | Shinwa Corp | Intake filter unit for gas turbine |
| JP2013121556A (en) * | 2011-12-09 | 2013-06-20 | Toray Ind Inc | Filter medium |
| US8932380B2 (en) | 2010-10-06 | 2015-01-13 | Nec Display Solutions, Ltd. | Dust removal device |
| CN104343749A (en) * | 2013-07-30 | 2015-02-11 | 株式会社大阳路 | Dust collecting filter for fan |
| JP2015120108A (en) * | 2013-12-24 | 2015-07-02 | 東洋アルミエコープロダクツ株式会社 | Nonwoven fabric filter |
| KR20160005413A (en) * | 2014-07-07 | 2016-01-15 | 주식회사 자연 | Hydro-filter for the painting facility |
-
1998
- 1998-07-31 JP JP21658498A patent/JP3968613B2/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100405318B1 (en) * | 2000-11-20 | 2003-11-12 | 한국바이린주식회사 | Engine intake air filtering and It's Manufacturing method |
| WO2006025249A1 (en) * | 2004-08-30 | 2006-03-09 | Toshiba Tec Kabushiki Kaisha | Electric cleaner |
| JP2008029972A (en) * | 2006-07-31 | 2008-02-14 | Kowa Co Ltd | Filter for adsorbing dust and the like |
| JP2008080275A (en) * | 2006-09-28 | 2008-04-10 | Japan Vilene Co Ltd | Filter medium for particulate removal |
| JP2007125416A (en) * | 2007-01-05 | 2007-05-24 | Hitachi Appliances Inc | Vacuum cleaner |
| JP4485537B2 (en) * | 2007-01-05 | 2010-06-23 | 日立アプライアンス株式会社 | Vacuum cleaner |
| JP2010255612A (en) * | 2009-04-28 | 2010-11-11 | Shinwa Corp | Intake filter unit for gas turbine |
| US8932380B2 (en) | 2010-10-06 | 2015-01-13 | Nec Display Solutions, Ltd. | Dust removal device |
| JP2013121556A (en) * | 2011-12-09 | 2013-06-20 | Toray Ind Inc | Filter medium |
| CN104343749A (en) * | 2013-07-30 | 2015-02-11 | 株式会社大阳路 | Dust collecting filter for fan |
| JP2015028307A (en) * | 2013-07-30 | 2015-02-12 | 株式会社サンロード | Dust collection filter for electric fan |
| JP2015120108A (en) * | 2013-12-24 | 2015-07-02 | 東洋アルミエコープロダクツ株式会社 | Nonwoven fabric filter |
| KR20160005413A (en) * | 2014-07-07 | 2016-01-15 | 주식회사 자연 | Hydro-filter for the painting facility |
| KR101627727B1 (en) * | 2014-07-07 | 2016-06-07 | 주식회사 자연 | Hydro-filter for the painting facility |
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| Publication number | Publication date |
|---|---|
| JP3968613B2 (en) | 2007-08-29 |
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