JP3014439B2 - Filter media - Google Patents
Filter mediaInfo
- Publication number
- JP3014439B2 JP3014439B2 JP2327043A JP32704390A JP3014439B2 JP 3014439 B2 JP3014439 B2 JP 3014439B2 JP 2327043 A JP2327043 A JP 2327043A JP 32704390 A JP32704390 A JP 32704390A JP 3014439 B2 JP3014439 B2 JP 3014439B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- filter medium
- fibers
- layer
- 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 - Fee Related
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Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は濾材に関するものであって、特にエンジン等
の内燃機関のオイルフィルターやエアフィルター用の濾
材に関するものである。Description: TECHNICAL FIELD The present invention relates to a filter medium, and more particularly to a filter medium for an oil filter or an air filter of an internal combustion engine such as an engine.
［従来の技術］ 従来、フィルター用濾材は、木材パルプ、木綿、麻、
レーヨン等を原料とし、湿式抄紙法により製造した濾
紙、あるいはこの濾紙に樹脂を含浸し、強度、加工性を
高めたもの、この濾紙にオイルを含浸し、ライフ性能を
高めたものがある。[Prior art] Conventionally, filter media for filters include wood pulp, cotton, hemp,
There is a filter paper made from rayon or the like by a wet papermaking method, a filter paper impregnated with a resin to increase strength and workability, and a filter paper impregnated with oil to improve life performance.
しかしながら、濾紙タイプのものは、表面でダストの
ほとんどを濾過しているため、濾材自体の圧力損失を大
きく、ライフも短いため、濾過面積を大きくする必要が
あり、濾材が多量に必要となる。オイルを含浸したもの
は、ライフは長いが濾過性能は低く、圧力損失は大きい
ため、やはり濾過面積を大きくとる必要がある。However, since the filter paper type filters out most of the dust on the surface, the pressure loss of the filter medium itself is large and the life is short, so that it is necessary to increase the filtration area, and a large amount of filter medium is required. Oil-impregnated oils have a long life but low filtration performance and a large pressure loss, and therefore also require a large filtration area.
また、繊維径が比較的大きく、比較的大きな粒子は慣
性による濾過で捕集されるものの、炭素塵の様なさらに
細かい粒子は濾材からのもれが大きい。Further, although the fiber diameter is relatively large, relatively large particles are collected by filtration by inertia, but finer particles such as carbon dust leak from the filter medium greatly.
これに対し、近年合成繊維を原料とし、密度勾配型に
繊維層を積層し、バインダーを用い固めたもの、さらに
樹脂を含浸したものが、新たに用いられ出した。On the other hand, in recent years, a fiber obtained by laminating fiber layers in a density gradient type using synthetic fibers as a raw material and solidifying with a binder, and further impregnating with a resin have been newly used.
密度勾配型の濾材は濾材密度が上流から下流方向にか
けて、粗から密に変化するよう形成されている。これら
の濾材は層を形成する繊維径を、上流は太い繊維を多
く、下流は細い繊維を多くすることで密度コントロール
が行われているもの（例えば特公昭54−40778号公報、
特開昭57−59614号公報、特公昭２−45484号公報）、粉
末のバインダーの分布を制御し、密度をコントロールし
たもの（例えば特開昭57−75117号公報）、密度と坪量
のみを規定したもの（例えば特開昭62−279817号公報）
等が開示されている。また、特開昭52−112859号公報に
於いては実施例中で、各層の平均孔径が記載されている
が、上流の孔径は非常に大きいものとなっている。従来
から、濾材の上流側と下流側の層の孔径を特定の範囲に
制御することで、濾材性能が向上するといった知見は見
いださされていない。The density gradient filter medium is formed such that the filter medium density changes from coarse to dense from upstream to downstream. In these filter media, the density is controlled by increasing the diameter of the fiber forming the layer, increasing the number of thick fibers upstream, and increasing the number of thin fibers downstream (for example, Japanese Patent Publication No. 54-40778,
JP-A-57-59614, JP-B-2-45484), those in which the distribution of the binder in the powder is controlled and the density is controlled (for example, JP-A-57-75117), only the density and basis weight are measured. Specified (for example, JP-A-62-279817)
Are disclosed. In the examples of JP-A-52-112859, the average pore size of each layer is described, but the upstream pore size is very large. Conventionally, no finding has been found that controlling the pore diameter of the layers on the upstream and downstream sides of the filter medium within a specific range improves the filter medium performance.
上記の濾材はいずれも、上流側である低密度層で大寸
法粒子を捕捉し、高密度層で微細粒子が捕捉され、ライ
フの向上を図ることができる。In any of the above filter media, large-sized particles are captured in the low-density layer on the upstream side, and fine particles are captured in the high-density layer, so that the life can be improved.
しかしながら、これら濾材は表面濾過が殆どできず、
濾材内部での目ずまりが起こりやすく、圧力損失が増大
するという欠点がある。また、濾材表面での濾過が殆ど
行われないので、ライフ向上には限界がある。However, these filter media can hardly perform surface filtration,
There is a drawback that clogging easily occurs inside the filter medium and pressure loss increases. In addition, since the filtration on the surface of the filter medium is hardly performed, there is a limit in improving the life.
また、密度勾配がついているので、拡散による濾過で
比較的小さい粒子を捕集する反面、圧力損失を下げるた
め、濾材は大きな孔径を有しており、比較的大きな粒子
の捕集効率は必ずしも満足の行くものではない。In addition, because of the density gradient, relatively small particles are collected by filtration by diffusion, but the filter medium has a large pore size to reduce pressure loss, and the collection efficiency of relatively large particles is not always satisfactory. It is not what you go for.
さらに、合成繊維を用いた濾材は、ダストの捕集性能
を高めるため、高密度層の構成繊維を細くし、比較的厚
い層としたり樹脂含浸量を多くすること、ライフを高め
るため、低密度層は厚くすることが行われているが、こ
のため、濾材全体の厚みは必要以上に大きくなり、圧力
損失が大きくなったり、加工上支障を来すという問題点
があった。In addition, the filter media using synthetic fibers has the advantage of reducing the density of constituent fibers in the high-density layer and increasing the resin impregnation to a relatively thick layer in order to enhance the dust collection performance. Although the thickness of the layer is increased, the thickness of the entire filter medium becomes unnecessarily large, causing a problem that the pressure loss increases and the processing is hindered.
［発明が解決しようとする課題］ 本発明は上記従来の課題を解決するためのものであ
り、濾過効率が高く、圧力損失が小さく、しかもライフ
の長い濾材を提供することを目的とする。[Problems to be Solved by the Invention] The present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a filter medium having a high filtration efficiency, a small pressure loss, and a long life.
［課題を解決するための手段］ 本発明者らは前記の課題を解決するため鋭意研究を行
った。その結果、少なくとも２層以上の構造を有し、ダ
スト流入側より下流に配置された層に特定の微細繊維を
用い、上流側の層と該下流側の層の孔径を所定の範囲に
することで、高捕集効率、低圧力損失、ロングライフの
濾材を得られることを見いだし本発明を完成した。[Means for Solving the Problems] The present inventors have conducted intensive research to solve the above problems. As a result, at least two layers or more are used, and specific fine fibers are used in a layer arranged downstream from the dust inflow side, and the pore diameters of the upstream layer and the downstream layer are within a predetermined range. Thus, the present inventors have found that a filter medium having high collection efficiency, low pressure loss, and long life can be obtained, and the present invention has been completed.
即ち本発明は、少なくとも２層以上の構造を有し、ダ
ストを含有する流体が濾材に流入する側である上流に配
置された層より下流に配置された層が繊維径１μｍ以下
の有機合成繊維を含有し、上流に配置された層の最大孔
径が120〜250μｍ、平均孔径が40〜90μｍであり、繊維
径１μｍ以下の有機合成繊維を含有する層の最大孔径が
10〜50μｍ、平均孔径が５〜20μｍである濾材に関す
る。That is, the present invention provides an organic synthetic fiber having a structure in which at least two layers or more, and a layer disposed downstream of a layer disposed upstream which is a side where a fluid containing dust flows into the filter medium has a fiber diameter of 1 μm or less. The maximum pore diameter of the layer disposed upstream is 120 to 250 μm, the average pore diameter is 40 to 90 μm, and the maximum pore diameter of the layer containing organic synthetic fibers having a fiber diameter of 1 μm or less is
The present invention relates to a filter medium having a diameter of 10 to 50 μm and an average pore diameter of 5 to 20 μm.
以下、本発明の詳細な説明を行う。 Hereinafter, the present invention will be described in detail.
本発明の濾材は、少なくとも２層以上の構造を有し、
それぞれが特定の孔径を有し、かつ下流の層に特定の有
機合成微細繊維を含有するものである。The filter medium of the present invention has a structure of at least two layers,
Each has a specific pore size, and contains a specific organic synthetic fine fiber in a downstream layer.
上流の孔径を特定することで、濾過が表面や濾材内部
に偏ることなく捕集されるため濾材のライフが大きくな
る。By specifying the upstream pore diameter, the filtration is collected without being concentrated on the surface or inside the filter medium, so that the life of the filter medium is increased.
また、下流の孔径を特定することで、捕集効率の向上
を図ることができる。In addition, by specifying the downstream hole diameter, the collection efficiency can be improved.
孔径の測定に関してはASTM Ｆ−316（American Soci
ety for Testing and Metirials）、BS 6410および332
1（British Standard）に記載された、液体で空隙
（孔）を満たされた濾材にかける圧力を増大させ、その
過程で孔から液体が排出される様子をモニターすること
により求める方法を用いた。これらは膜およびフィルタ
ーの最大孔径および平均径を測定できる一般的な方法で
ある。For measurement of pore size, see ASTM F-316 (American Socie
ety for Testing and Metirials), BS 6410 and 332
The method described in No. 1 (British Standard) was used in which the pressure applied to a filter medium filled with voids (holes) was increased and the manner in which the liquid was discharged from the holes during the process was monitored. These are common methods by which the maximum and average pore sizes of membranes and filters can be measured.
上流側に配置された層は、最大径が120〜250μｍ、平
均孔径が40〜90μｍを有するものが好ましい。The layer arranged on the upstream side preferably has a maximum diameter of 120 to 250 μm and an average pore diameter of 40 to 90 μm.
上流側の最大孔径が250μｍを超えるときや平均孔径
が90μｍを超えるときは、濾材表面での濾過が行われに
くいため、ダストは濾材内部深層で捕捉され、濾材の圧
力損失が急激に大きくなり、濾材のライフが短くなる。When the maximum pore diameter on the upstream side exceeds 250 μm or when the average pore diameter exceeds 90 μm, since filtration on the surface of the filter medium is difficult to be performed, dust is trapped in the deep layer inside the filter medium, and the pressure loss of the filter medium rapidly increases, The life of the filter media is shortened.
上流側の最大孔径が120μｍより小さいときや平均孔
径が40μｍより小さいとき、濾材の圧力損失が大きくな
り、好ましくない。When the maximum pore size on the upstream side is smaller than 120 μm or when the average pore size is smaller than 40 μm, the pressure loss of the filter medium increases, which is not preferable.
さらにこの層より下流側に繊維径１μｍ以下の有機合
成繊維を含有し、最大孔径が10〜50μｍ、平均孔径が５
〜20μｍを有する層を配置する。Further, downstream of this layer, organic synthetic fibers having a fiber diameter of 1 μm or less are contained, the maximum pore diameter is 10 to 50 μm, and the average pore diameter is 5 μm.
Arrange layers with 2020 μm.
下流側の最大孔径が50μｍを超えるときや平均孔径が
20μｍを超えるとき、濾材の捕集効率が小さくなり好ま
しくない。When the maximum pore size on the downstream side exceeds 50 μm or when the average pore size is
If it exceeds 20 μm, the collection efficiency of the filter medium becomes small, which is not preferable.
下流側の最大孔径が10μｍより小さいとき、平均孔径
が５μｍより小さいとき、濾材の圧力損失は大きくなり
好ましくない。When the maximum pore diameter on the downstream side is smaller than 10 μm, and when the average pore diameter is smaller than 5 μm, the pressure loss of the filter medium increases, which is not preferable.
こられ濾材の層はシート状構造を有し、材質は特に制
限はないが、繊維状の材料を用いたものが好ましい。シ
ート形成法としては、乾式法、スパンボンド法、メルト
ブロー法等と湿式抄紙法による方法が考えられる。しか
し、乾式法では、均一なシートを作ること困難で、孔径
分布が不均一となり好ましくない。スパンボンド法、メ
ルトブロー法では複数の繊維、例えば繊維径、繊維長の
異なる繊維、材質、形状の異なる繊維を混合すること困
難で、本発明の濾材の物性を満足することは困難であ
る。The filter material layer has a sheet-like structure, and the material is not particularly limited, but a material using a fibrous material is preferable. Examples of the sheet forming method include a dry method, a spun bond method, a melt blow method, and a wet papermaking method. However, it is difficult to produce a uniform sheet by the dry method, and the pore size distribution is not uniform, which is not preferable. In the spun bond method and the melt blow method, it is difficult to mix a plurality of fibers, for example, fibers having different fiber diameters and fiber lengths, fibers having different materials and shapes, and it is difficult to satisfy the physical properties of the filter medium of the present invention.
このことから、シート形成法としては、湿式抄紙法を
用いるのが好ましい。シートの積層方法としては、特に
制限はない。湿式抄紙法により抄き合わせる方法、湿式
抄紙したシートを熱融着する方法、ニードルあるいは高
圧水流で一体化する方法等があげられる。For this reason, it is preferable to use a wet papermaking method as the sheet forming method. The method for laminating the sheets is not particularly limited. Examples thereof include a method of laminating by a wet papermaking method, a method of heat-sealing wet-sheeted sheets, and a method of integrating with a needle or a high-pressure water flow.
また、必要であれば濾材の性能を阻害しない範囲で、
さらに該シートに、乾式法、湿式法のシートをさらに積
層することも可能である。Also, if necessary, within the range that does not hinder the performance of the filter medium,
Further, a sheet of a dry method or a sheet of a wet method can be further laminated on the sheet.
上流側に配置された層は、有機繊維、無機繊維を適宜
混合して用いることができる。例えば、ポリエステル繊
維、ポリオレフィン繊維、ポリアミド繊維、ポリイミド
繊維、レーヨン繊維、ポリアクリルニトリル繊維、ポリ
ビニルアルコール繊維等の有機繊維、セラミック繊維、
炭素繊維、活性炭素繊維、ガラス繊維、ロックウール繊
維、セピオライト繊維等が使用可能である。これらを単
独で用いても良いし、２種類以上を併用してもよい。た
だし、内燃機関に用いる場合、ガラス繊維は好ましくな
い。The layer disposed on the upstream side can be used by appropriately mixing organic fibers and inorganic fibers. For example, polyester fibers, polyolefin fibers, polyamide fibers, polyimide fibers, rayon fibers, polyacrylonitrile fibers, organic fibers such as polyvinyl alcohol fibers, ceramic fibers,
Carbon fiber, activated carbon fiber, glass fiber, rock wool fiber, sepiolite fiber and the like can be used. These may be used alone or in combination of two or more. However, when used in an internal combustion engine, glass fibers are not preferred.
バインダーとしては有機繊維からなる繊維状のものが
好ましく、特に芯鞘構造を持ち、熱溶融性樹脂からな
り、鞘の融点が芯より40℃以上低いものが好ましい。熱
溶融性樹脂は、ポリエステル系、ポリオレフィン系樹脂
が好ましい。繊維状バインダーの配合量は繊維全体の重
量に対して、５〜40重量％の範囲が好ましい。The binder is preferably a fibrous organic fiber, and more preferably has a core-sheath structure, is made of a heat-meltable resin, and has a sheath whose melting point is lower than the core by 40 ° C. or more. The heat-meltable resin is preferably a polyester-based or polyolefin-based resin. The compounding amount of the fibrous binder is preferably in the range of 5 to 40% by weight based on the weight of the entire fiber.
上記の濾材の物性を満足することができる繊維の繊維
径で、上流に用いる繊維の繊維径は１〜10デニールで好
ましくは１〜６デニールである。この径を有する繊維が
繊維重量の50重量％以上含有されているのが好ましい。
１デニールより細いの繊維を50重量％を超える範囲で用
いると、孔径が小さくなり圧力損失が大きくなるため好
ましくなく、10デニールより大きいと孔径が大きくな
り、ダストが濾材内部まで進入し、圧力損失の上昇を招
き、濾材のライフが短くなる。The fiber diameter of the fiber that can satisfy the physical properties of the above-mentioned filter medium is 1 to 10 denier, preferably 1 to 6 denier. It is preferable that the fiber having this diameter is contained in 50% by weight or more of the fiber weight.
Use of a fiber finer than 1 denier in a range exceeding 50% by weight is not preferable because the pore size becomes small and the pressure loss increases. If it is larger than 10 denier, the pore size becomes large and dust enters the inside of the filter medium, causing a pressure loss. And the life of the filter medium is shortened.
この層より下流側に配置された層は、繊維径１μｍ以
下の有機合成繊維を必須成分とする。The layer disposed downstream of this layer contains organic synthetic fibers having a fiber diameter of 1 μm or less as essential components.
繊維径１μｍ以下の有機合成繊維はダストの捕集性能
が優れている。有機合成繊維としては、従来用いられて
きたような柔軟なものはフィルターの圧力損失が高くな
り好ましくないので、できるだけ剛直なものが好まし
く、特に剛直鎖状高分子と総称される材料からなる有機
合成繊維が有効である。剛直鎖状高分子とは、溶液中直
線状を維持する鎖長が50オングストローム以上ある高分
子のことであり、例えば、ポリ（Ｐ−フェニレンテレフ
タルアミド）、ポリ（Ｐ−ベンズアミド）、ポリ（Ｐ−
フェニレンベンゾビスチアゾール）、ポリ（Ｐ−フェニ
レンベンゾビスオキサゾール）、ポリ（アミドヒドラジ
ド）、ポリヒドラジド、ポリ（Ｐ−フェニレンテレフタ
ルアミド−3,4−ジフェニルエーテルテレフタルアミ
ド）などがある。Organic synthetic fibers having a fiber diameter of 1 μm or less have excellent dust collecting performance. As organic synthetic fibers, conventionally used flexible ones are not preferable because the pressure loss of the filter is high, which is not preferable. Therefore, the organic synthetic fibers are preferably as rigid as possible. Fiber is effective. The rigid linear polymer is a polymer having a chain length of 50 angstroms or more that maintains linearity in a solution, and examples thereof include poly (P-phenylene terephthalamide), poly (P-benzamide), and poly (P-benzamide). −
Examples include phenylene benzobisthiazole), poly (P-phenylene benzobisoxazole), poly (amide hydrazide), polyhydrazide, and poly (P-phenylene terephthalamide-3,4-diphenyl ether terephthalamide).
繊維径１μｍ以下の繊維を得る方法の一例として、剛
直鎖状高分子の繊維あるいはパルプ状物に特開昭56−10
0801号公報に開示されている方法を用いミクロフィブリ
ル化したものがあげられる。この方法は一般の製紙工程
で用いられているリファイナー等による処理とは異な
り、均質化装置を用いて繊維あるいはパルプ状物をミク
ロフィブリル化するものである。すなわち、水に分散さ
せた、剛直鎖状高分子から得られた繊維のスラリーをそ
の前後に200kgf/cm2以上の圧力差を設けたオリフィスを
高速で通過させ、直ちに減速することによりスラリー粒
子にせん断力を加えると、繊維が繊維軸の方向に縦分割
されたミクロフィブリル状になる。この工程を繰り返す
ことにより得られた物である。具体的な例としては、ポ
リ（Ｐ−フェニレンテレフタルアミド）のミクロフィブ
リル化繊維（MFC−400、ダイセル化学社製）等があげら
れる。As an example of a method for obtaining a fiber having a fiber diameter of 1 μm or less, Japanese Patent Laid-Open Publication No.
Microfibrillated ones using the method disclosed in Japanese Patent Publication No. 0801 are mentioned. This method differs from the treatment by a refiner or the like used in a general papermaking process, in which a fiber or a pulp-like material is microfibrillated using a homogenizing device. That is, a fiber slurry obtained from a rigid linear polymer dispersed in water is passed through an orifice having a pressure difference of 200 kgf / cm 2 or more at the front and back thereof at a high speed, and immediately decelerated to form slurry particles. When a shearing force is applied, the fibers become microfibrils vertically divided in the direction of the fiber axis. This is obtained by repeating this step. Specific examples include microfibrillated fibers of poly (P-phenylene terephthalamide) (MFC-400, manufactured by Daicel Chemical Industries, Ltd.).
本発明で用いる有機合成繊維は、通常用いらる繊維を
摩砕する方法やせん断する方法では到底得ることができ
ない、１μｍ以下という微細な繊維径を有している。ま
た、他の繊維との絡み合いがよく、他の繊維と容易に均
一なスラリーを形成でき、次の工程への転移が容易であ
り、通常の抄紙設備で効率よく製造できる。The organic synthetic fiber used in the present invention has a fine fiber diameter of 1 μm or less, which cannot be obtained by a commonly used method of grinding or shearing a fiber. In addition, it is well entangled with other fibers, can easily form a uniform slurry with other fibers, can be easily transferred to the next step, and can be efficiently manufactured by ordinary papermaking equipment.
繊維径１μｍ以下の有機合成繊維の量はその繊維を含
有する層の繊維重量に対し、0.01〜10重量％であるが、
該層に２デニール以上の径を有し、捲縮あるいは異形断
面を持つ繊維が含有される場合、繊維径１μｍ以下の有
機合成繊維の量は、その繊維に対し、25重量％以下の範
囲であれば、この限りではない。The amount of the organic synthetic fiber having a fiber diameter of 1 μm or less is 0.01 to 10% by weight with respect to the fiber weight of the layer containing the fiber.
When the layer contains a fiber having a diameter of 2 denier or more and having a crimped or irregular cross section, the amount of the organic synthetic fiber having a fiber diameter of 1 μm or less is in a range of 25% by weight or less based on the fiber. If so, this is not the case.
繊維径１μｍ以下の有機合成繊維の量が0.1重量％よ
り少ないと良好な捕集効率を得ることができない。10重
量％より多いと捕集効率は上がるものの、濾材の孔径が
小さくなり、圧力損失が上昇するため好ましくない。If the amount of the organic synthetic fiber having a fiber diameter of 1 μm or less is less than 0.1% by weight, good collection efficiency cannot be obtained. If the content is more than 10% by weight, the collection efficiency increases, but the pore size of the filter medium becomes small, and the pressure loss increases, which is not preferable.
他に該下流側の層に含有される繊維として、素材とし
ては上流側と同じ物を用いることが可能である。バイン
ダー繊維も同じものを用いることが可能である。In addition, as the fiber contained in the downstream layer, the same material as that of the upstream side can be used as a material. The same binder fiber can be used.
このようにして、作製された濾材は、さらに、強度ア
ップ、加工性を向上させる目的で、樹脂を含浸すること
も可能である。用いる樹脂は、熱、電子線、紫外線で硬
化し、可塑化するもにであればよい。フェノール系、ア
クリル系、酢酸ビニル系、スチレン系、ポリエステル系
等の一般的樹脂が広く使用可能である。含浸工程に特に
制限はない。The filter medium thus produced can be further impregnated with a resin for the purpose of increasing strength and improving workability. The resin to be used may be any resin that can be cured by heat, an electron beam or ultraviolet light and plasticized. General resins such as phenol-based, acrylic-based, vinyl acetate-based, styrene-based, and polyester-based resins can be widely used. There is no particular limitation on the impregnation step.
また、必要に応じて、撥水、撥油加工を施すことも可
能である。Moreover, it is also possible to perform a water-repellent or oil-repellent process as needed.
［作用］ 本発明の濾材は、上流とその層より下流の層に特定の
孔径を有する層を用いること、かつ下流に特定の微細繊
維を用いることにより達成される高性能の濾材である。
特に内燃機関のフィルターとして有効に作用する。[Function] The filter medium of the present invention is a high-performance filter medium achieved by using a layer having a specific pore diameter in the upstream and downstream layers and using specific fine fibers downstream.
In particular, it works effectively as a filter for an internal combustion engine.
［実施例］ 以下に実施例をあげて本発明を具体的に説明するが、
本発明は本実施例に限定されるものではない。[Examples] Hereinafter, the present invention will be described specifically with reference to Examples.
The present invention is not limited to this embodiment.
実施例において記載の部、％はすべて重量部および重
量％によるものである。In the examples, all parts and percentages are by weight.
実施例１ 上流側としてPET繊維（Ａ）（２デニール×5mm、帝人
社製）を80％、PETバインダー繊維（ａ）（２デニール
×5mm、メルティー4080芯鞘タイプ、ユニチカ社製）を2
0％を水中に均一に分散し、スラリーを調製した。Example 1 80% PET fiber (A) (2 denier × 5 mm, manufactured by Teijin Limited) and 2% PET binder fiber (a) (2 denier × 5 mm, Melty 4080 core / sheath type, manufactured by Unitika Ltd.) were used as the upstream side.
0% was uniformly dispersed in water to prepare a slurry.
下流側としてPET繊維（Ｂ）（0.1デニール×5mm、帝
人社製）を79.5％、PETバインダー繊維（ａ）を20部、
繊維径１μｍ以下の有機合成繊維（MFC400、ダイセル社
製）を0.5％を分散剤とともに水中に均一に分散し、ス
ラリーを調製した。79.5% of PET fiber (B) (0.1 denier x 5 mm, manufactured by Teijin Limited) as the downstream side, 20 parts of PET binder fiber (a),
0.5% or less of organic synthetic fiber (MFC400, manufactured by Daicel) having a fiber diameter of 1 μm or less was uniformly dispersed in water together with a dispersant in water to prepare a slurry.
上流側を70g/m2、下流側を30g/m2の２層構造の濾材を
抄き合わせ、120℃で乾燥後、170℃で熱処理を行い、樹
脂含浸を行い、乾燥後、150℃でキュアリングを行っ
た。さらに、撥水剤を含浸し乾燥を行い濾材を作製し
た。The upstream 70 g / m 2, a downstream combined paper making a filter medium having a two-layer structure of 30 g / m 2, dried at 120 ° C., subjected to heat treatment at 170 ° C., subjected to resin impregnation, after drying, at 0.99 ° C. Cure was performed. Further, the resultant was impregnated with a water repellent and dried to prepare a filter medium.
樹脂は、アクリル系樹脂（プライマールHA−16、日本
アクリル化学社製）で、シート重量に対し９％、撥水剤
は、フッ素系（スミレーズFP210、住友化学社製）で、
シート重量に対し0.2％となるよう調整した。The resin is acrylic resin (Primal HA-16, manufactured by Nippon Acrylic Chemicals Co., Ltd.), 9% of the sheet weight, and the water repellent is fluorine-based (Sumireze FP210, manufactured by Sumitomo Chemical Co., Ltd.)
It was adjusted to be 0.2% based on the sheet weight.
実施例２ 上流側の坪量を80g/m2、下流側の配合をPET繊維
（Ｂ）を75％、PETバインダー繊維（ａ）を20％、繊維
径１μｍ以下の有機合成繊維を５％とし、その坪量を20
g/m2とする以外は、実施例１と同じ方法で濾材を作製し
た。Example 2 The basis weight on the upstream side was 80 g / m 2 , the composition on the downstream side was 75% of PET fiber (B), 20% of PET binder fiber (a), and 5% of organic synthetic fiber having a fiber diameter of 1 μm or less. , Its basis weight is 20
A filter medium was produced in the same manner as in Example 1 except that the filtration material was changed to g / m 2 .
実施例３ 上流側の坪量を120g/m2、下流側の坪量を30g/m2とす
る以外は実施例１と同じ方法で濾材を作製した。Example 3 A filter medium was produced in the same manner as in Example 1, except that the basis weight on the upstream side was 120 g / m 2 and the basis weight on the downstream side was 30 g / m 2 .
実施例４ 上流側の坪量を93g/m2、下流側の配合をPET繊維
（Ｂ）を10％、PETバインダー繊維（ａ）を20％、繊維
径１μｍ以下の有機合成繊維を５％、PET繊維（Ａ）を6
5％とし、坪量を80g/m2とする以外は、実施例１と同様
の方法で濾材を作製した。Example 4 The basis weight on the upstream side was 93 g / m 2 , the blending on the downstream side was 10% of PET fiber (B), 20% of PET binder fiber (a), 5% of organic synthetic fiber having a fiber diameter of 1 μm or less, 6 PET fibers (A)
A filter medium was prepared in the same manner as in Example 1 except that the weight was 5% and the basis weight was 80 g / m 2 .
比較例１ 上流側の配合を、PET繊維（Ｃ）（６デニール×10m
m、帝人社製）を50％、PET繊維を30％、PETバインダー
繊維（ａ）を20％で、坪量130g/m2とする以外は実施例
１と同じ方法で濾材を作製した。Comparative Example 1 The upstream fiber was blended with PET fiber (C) (6 denier × 10 m
m, manufactured by Teijin Limited) was 50%, PET fiber was 30%, PET binder fiber (a) was 20%, and a filter medium was produced in the same manner as in Example 1 except that the basis weight was 130 g / m 2 .
比較例２ 下流側の配合をPET繊維（Ｃ）（0.5デニール×5mm、
帝人社製）を40％、PET繊維（Ｂ）を40％、PETバインダ
ー繊維（ａ）を20％で、坪量を70g/m2にする以外は実施
例１と同じ方法で濾材を作製した。Comparative Example 2 The blending of the downstream side was performed using PET fiber (C) (0.5 denier x 5 mm,
A filter medium was prepared in the same manner as in Example 1 except that the ratio was 40%, the PET fiber (B) was 40%, the PET binder fiber (a) was 20%, and the basis weight was 70 g / m 2 . .
比較例３、４ 市販のエレメントを購入し、使用濾材の評価を行っ
た。比較例３は樹脂を含浸した乾式不織布と樹脂を含浸
市内乾式不織布をニードルパンチ方式で一体化したも
の、比較例４は針葉樹パルプ、木綿パルプを抄紙しフェ
ノール樹脂を含浸した濾紙タイプである。Comparative Examples 3 and 4 Commercially available elements were purchased and the filter media used were evaluated. Comparative Example 3 is obtained by integrating a resin-impregnated dry nonwoven fabric and a resin-impregnated dry nonwoven fabric by a needle punch method, and Comparative Example 4 is a filter paper type in which softwood pulp and cotton pulp are made and phenol resin is impregnated.
表１に濾材の物性を示す。孔径はASTM Ｆ−316記載
の方法を用いた。Table 1 shows the physical properties of the filter medium. The pore diameter used was the method described in ASTM F-316.
＊比較例３の△は300μｍ以上。 * In Comparative Example 3 is 300 μm or more.
＊比較例４は一層構造。* Comparative Example 4 has a single-layer structure.
表２、３、４に濾材の性能を示す。 Tables 2, 3, and 4 show the performance of the filter media.
表２の圧力損失、捕集効率はJIS−B9908の形式１によ
り風速5.3cm/秒で測定した。また、捕集効率の測定はDO
Pエアロゾル（フタル酸ジオクチル、粒径0.3μｍ）を用
いた。The pressure loss and collection efficiency in Table 2 were measured at a wind speed of 5.3 cm / sec according to JIS-B9908 format 1. In addition, the measurement of collection efficiency is DO
P aerosol (dioctyl phthalate, particle size 0.3 μm) was used.
表３、４の初期圧力損失、捕集効率は、定格流量5.0m
3/分、濾過面積1256cm2、JIS8種粉塵、軽油排気ガス中
の炭素塵を用いて測定した。圧力損失が100mmAq増加す
るときのダスト保持量を測定した。The initial pressure loss and collection efficiency in Tables 3 and 4 are rated flow 5.0m
The measurement was performed using 3 / min, a filtration area of 1256 cm 2 , JIS Class 8 dust, and carbon dust in light oil exhaust gas. The dust retention when the pressure loss increased by 100 mmAq was measured.
また、濾材を5cm間隔で折り込み、ひだ折り加工し、2
0×15×5cmの箱型のエレメントを作製したときの、濾材
の折り山の数を記す。In addition, fold the filter media at 5 cm intervals, fold it,
The number of folds of the filter medium when a box-shaped element of 0 × 15 × 5 cm is produced is described.
表１〜４より、上流とその下流に特定の孔径を有し、
かつ該下流側に有機合成微細繊維を含有する層よりなる
濾材がDOP、JIS8種粉塵、炭素塵ともに捕集効率が高
く、ライフが長いことが判る。また、特定の大きさのエ
レメントに多くの濾材を折り込めるため、エレメント自
体の低圧損化、さらにロングライフ化が可能である。 From Tables 1 to 4, it has a specific pore size upstream and downstream,
In addition, it can be seen that the filter medium comprising a layer containing organic synthetic fine fibers on the downstream side has a high collection efficiency for both DOP, JIS Class 8 dust and carbon dust, and has a long life. Further, since a large number of filter media can be folded into an element of a specific size, it is possible to reduce the pressure loss of the element itself and extend its life.
［発明の効果］ 本発明の濾材は、圧力損失が低く、捕集効率が高く、
ライフの長い濾材である。フィルター、特に内燃機関の
エアフィルター、オイルフィルターとして効果的であ
る。[Effects of the Invention] The filter medium of the present invention has low pressure loss, high collection efficiency,
It is a long-life filter medium. It is effective as a filter, especially an air filter and an oil filter of an internal combustion engine.
Claims (1)
を含有する流体が濾材に流入する側である上流に配置さ
れた層より下流に配置された層が繊維径１μｍ以下の有
機合成繊維を含有し、上流に配置された層の最大孔径が
120〜250μｍ、平均孔径が40〜90μｍであり、繊維径１
μｍ以下の有機合成繊維を含有する層の最大孔径が10〜
50μｍ、平均孔径が５〜20μｍである濾材。An organic synthetic fiber having a structure having at least two layers and having a fiber diameter of 1 μm or less, wherein a layer disposed downstream of an upstream layer on which a fluid containing dust flows into a filter medium is provided. And the maximum pore size of the layer arranged upstream is
120-250 μm, average pore size 40-90 μm, fiber diameter 1
The maximum pore size of the layer containing organic synthetic fibers of μm or less is 10 to
A filter medium having a size of 50 μm and an average pore size of 5 to 20 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2327043A JP3014439B2 (en) | 1990-11-28 | 1990-11-28 | Filter media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2327043A JP3014439B2 (en) | 1990-11-28 | 1990-11-28 | Filter media |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04193316A JPH04193316A (en) | 1992-07-13 |
| JP3014439B2 true JP3014439B2 (en) | 2000-02-28 |
Family
ID=18194674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2327043A Expired - Fee Related JP3014439B2 (en) | 1990-11-28 | 1990-11-28 | Filter media |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3014439B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5308031B2 (en) * | 2005-02-04 | 2013-10-09 | ドナルドソン カンパニー，インコーポレイティド | Ventilation filter and ventilation filtration assembly |
| JP4424444B2 (en) * | 2006-09-14 | 2010-03-03 | ダイニック株式会社 | Air filter material |
| JP4849160B2 (en) * | 2009-08-26 | 2012-01-11 | 株式会社デンソー | Filter media for fuel filters |
| JP7081911B2 (en) * | 2017-08-15 | 2022-06-07 | 三菱製紙株式会社 | Filter material for laminated filter |
-
1990
- 1990-11-28 JP JP2327043A patent/JP3014439B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04193316A (en) | 1992-07-13 |
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