JPS61268319A - Filter material - Google Patents
Filter materialInfo
- Publication number
- JPS61268319A JPS61268319A JP11075485A JP11075485A JPS61268319A JP S61268319 A JPS61268319 A JP S61268319A JP 11075485 A JP11075485 A JP 11075485A JP 11075485 A JP11075485 A JP 11075485A JP S61268319 A JPS61268319 A JP S61268319A
- Authority
- JP
- Japan
- Prior art keywords
- density
- filter material
- filter
- fluid
- low
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 29
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims description 23
- 239000000428 dust Substances 0.000 abstract description 17
- 239000002245 particle Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 13
- 239000011148 porous material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000010419 fine particle Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- -1 and conversely Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Landscapes
- Paper (AREA)
- Filtering Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は濾過材に関し、特に内燃機関のオイルフィルタ
ーやエアーフィルターなどに好適な濾過材に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a filter material, and particularly to a filter material suitable for oil filters, air filters, etc. of internal combustion engines.
自動車のオイルフィルターやエアーフィルターに使用す
る濾過材として要求される条件としては、被濾過流体中
に存在するダストなどの微粒子を効果的に除去する濾過
性能を有し、しかも長期間にわたって良好な濾過性能を
維持し続けることが特に重要である。The requirements for a filtration material used in automobile oil filters and air filters are to have filtration performance that effectively removes dust and other particulates present in the fluid to be filtered, and to maintain good filtration over a long period of time. It is especially important to continue to maintain performance.
このような観点で、従来から様々な濾過材が提案されで
いるが、濾過性能の向上とライフの長期化との双方を同
時に具備させるという点に注いては、従来の濾過材は必
ずしも充分満足のいくものではない。From this point of view, various filtration media have been proposed in the past, but conventional filtration media are not always fully satisfactory in terms of simultaneously improving filtration performance and prolonging the service life. It's not something you can do.
たとえば、従来、！ＩＮ密度の異なる濾紙を投合させる
などして、濾紙の厚さ方向に密匪勾配を設けた濾過材が
知られているくたとえば特公昭５４−４−０７７８号公
報）。For example, conventionally! A filter material is known in which a density gradient is provided in the thickness direction of the filter paper by mixing filter papers with different IN densities (for example, Japanese Patent Publication No. 54-4-0778).
これら密度勾配型濾過材は、被濾過流体の流れの上流側
から下流側の方向に、粗から密へ変化するように形成さ
れているので、低密度層で大寸法粒子を捕捉し、高密麿
層で、微細粒子が捕捉されることにより、良好なふるい
分番ノ効果とある程度のライフの向上を図ることができ
る点ですぐれているが、以下のような欠点を有している
。These density gradient type filter media are formed so that the flow of the fluid to be filtered changes from coarse to dense in the direction from the upstream side to the downstream side, so large particles are captured in the low density layer, and high density particles are Although it is excellent in that it can achieve a good sieve sorting effect and improve life to some extent by trapping fine particles in the layer, it has the following drawbacks.
（イ） 従来の密度勾配型濾過材においては、濾過材を
通過する際の流速が速く、単なる接触によるダスト付着
（捕捉）が生じにくく深層部に突きささる様に強固に捕
捉されるため（いわゆる深層濾過）、濾材の目づまりが
おこりやすく、圧力損失がいぎおい増大するという問題
がある。(b) In conventional density gradient type filter media, the flow velocity when passing through the filter media is high, and dust adhesion (capture) due to mere contact is difficult to occur, and the dust is firmly captured so that it penetrates into the deep layer ( (So-called deep filtration), there is a problem that the filter medium is easily clogged and the pressure loss increases significantly.
（ロ） 従来の濾過材は、被濾過流体の上流側の濾材表
面の気孔率が大きいので、ダストが濾材の表面層内に取
り込まれやすく、このため濾材表面層上にダストケーキ
層が形成されにくいという欠点がある。したがって、ケ
ーキ層による濾過機能（すなわちプライマルフィルタ機
能）を期待することはできず、ロングライフ化を図る上
で大きな制限がある。(b) In conventional filter media, the porosity of the surface of the filter media on the upstream side of the fluid to be filtered is large, so dust is easily incorporated into the surface layer of the filter media, resulting in the formation of a dust cake layer on the surface layer of the filter media. The drawback is that it is difficult. Therefore, a filtration function (that is, a primal filter function) cannot be expected from the cake layer, and there are major limitations in achieving a long life.
本発明は、上述した点に鑑みてなされたものであり、濾
過性能とロングライフ化の双方にすぐれた濾過材を提供
することを目的とする。The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a filter material that is excellent in both filtration performance and long life.
上記目的を達成するために、本発明の濾過材は、厚さ方
向に密度勾配を有する濾過材において、被濾過流体の流
れの上流側が高密度で下流側が低密度であり、かつ、濾
過材の面方向に対しても高密度部と低密度部とが散在し
て形成されてなることを特徴とするものである。In order to achieve the above object, the filter medium of the present invention has a density gradient in the thickness direction, and has a high density on the upstream side of the flow of the fluid to be filtered and a low density on the downstream side of the flow of the fluid to be filtered. It is characterized in that high-density portions and low-density portions are formed scattered in the plane direction as well.
以下、本発明を実施例に基づいて詳細に説明する。 Hereinafter, the present invention will be explained in detail based on examples.
第１図の断面概念図に示寸ように、本発明の濾過材は、
基材１の厚さ方向において気孔２の径が被濾過流体の流
れ（図中の矢印）に対して上流側から下流側へ次第に大
きくなっている。さらに、基材１の面方向においても、
相対的に小さな気孔を有する高密度部と大ぎな気孔を有
する低密度部とが散在している。As shown in the cross-sectional conceptual diagram of FIG.
In the thickness direction of the base material 1, the diameter of the pores 2 gradually increases from the upstream side to the downstream side with respect to the flow of the fluid to be filtered (arrow in the figure). Furthermore, also in the surface direction of the base material 1,
High-density areas with relatively small pores and low-density areas with relatively large pores are scattered.
このように、被濾過流体の入口側を密にし出口側を素に
構成することにより、比較的大きなダスト粒子が濾過材
内部に取り込まれ捕捉されることを防止し、逆に濾過材
の表面上にダストケーキ層が形成されるのを促進する上
で大きな効果がある。In this way, by configuring the inlet side of the fluid to be filtered to be dense and the outlet side to be plain, relatively large dust particles are prevented from being taken into and trapped inside the filter material, and conversely, dust particles are prevented from being captured on the surface of the filter material. has a great effect on promoting the formation of a dust cake layer.
さらに、濾過材を通過する際の流速が徐々に遅くなる傾
向にあるため、密層を通過した比較的大きなダストも濾
過材内部に付着しやすくなり、しかも出口側を相に構成
しているため、このようなダスト付着による流通抵抗も
犬１】には増大しないという効果がある。これににす、
濾過材内部における目づまりを少なくするとともに、表
面に形成されるケーキ層による濾過作用（ブライマルフ
ィルター機能）を利用することにより濾過性能ならびに
ライフの向上を図ることができる。Furthermore, since the flow rate when passing through the filter medium tends to gradually slow down, relatively large dust particles that have passed through the dense layer tend to adhere to the inside of the filter medium. , the dog 1] has the effect that the flow resistance due to such dust adhesion does not increase. To this,
It is possible to improve filtration performance and life by reducing clogging inside the filter medium and by utilizing the filtration action (brimal filter function) of the cake layer formed on the surface.
さらに本発明の濾過材は、基材１の面方向において、相
対的に小さな気孔径を有する高密度部分と大きな気孔径
を有する低密度部分とが均一に分布するように形成され
ているので、ダストの捕捉を段階的に行なうことができ
る。すなわち、ダスト捕捉ににる目づまりは、まず高密
度部分で生じ、次いで低密度部分に移行するので、面方
向の密度が一定の場合に比べて圧力損失の増大防止どロ
ングライフ化を図ることができる。さらにまた、微細粒
子の除去は高密度部分で行なわれ、大寸法粒子の除去は
低密度部分の層で行なわれやすくなるので、両層の密度
範囲ならびに面積割合を適宜選択することににつでも濾
過性能の向上を図ることができる。また、面方向の密度
差は、連続的あるいは段階的に変化させてもよい。Furthermore, the filter medium of the present invention is formed so that the high-density portions having relatively small pore diameters and the low-density portions having large pore diameters are uniformly distributed in the surface direction of the base material 1. Dust capture can be carried out in stages. In other words, clogging in dust trapping occurs first in high-density areas and then moves to low-density areas, so compared to a case where the density in the plane direction is constant, it is necessary to prevent pressure loss from increasing and extend the life of the product. Can be done. Furthermore, since the removal of fine particles is more likely to be carried out in the high-density layer, and the removal of large-sized particles is more likely to be carried out in the lower-density layer, it is important to appropriately select the density range and area ratio of both layers. It is possible to improve filtration performance. Further, the density difference in the planar direction may be changed continuously or stepwise.
第２図および第３図は、本発明の他の実施態様に係る濾
過材の断面概念図であり、濾過材の表面または裏面に凹
凸部を設けることによって密度差を形成する場合の実施
例である。FIGS. 2 and 3 are cross-sectional conceptual diagrams of a filter medium according to another embodiment of the present invention, and are examples in which a density difference is formed by providing uneven portions on the front or back surface of the filter medium. be.
すなわち、第２図（ａ）においては、濾材の表面（流体
の上流側）に凹凸が設（プられており、凹部が低密度部
となり凸部が高密度部となるように構成され、一方、第
２図（ｂ）では、裏面側に同様の凹凸が設けられている
。In other words, in FIG. 2(a), the surface of the filter medium (on the upstream side of the fluid) is provided with concave and convex portions, and the concave portions are configured to be low-density portions and the convex portions are high-density portions. , FIG. 2(b), similar unevenness is provided on the back side.
また、第３図（ａ）、（ｂ）は、各々、濾材の高密度部
に凹部が設けられ、低密度部に凸部が設けられた場合の
例である。Moreover, FIGS. 3(a) and 3(b) are examples in which a concave portion is provided in a high-density portion of the filter medium and a convex portion is provided in a low-density portion, respectively.
一般に、大きな粒子は低密度部に集まり、微細粒子は高
密度部に集まりやすいので、上記第２図（ａ）の様な構
造することは、ダストケーキ層のレベルを一定に保持し
、これにより凹凸部の流速割合を一定に維持して濾過性
能を向上させる上で有利である。In general, large particles tend to gather in low-density areas, and fine particles tend to gather in high-density areas, so creating a structure like the one shown in Figure 2 (a) above maintains the level of the dust cake layer at a constant level. This is advantageous in improving filtration performance by maintaining the flow velocity ratio of the uneven portions constant.
濾過材の構成材料どしては、従来、濾紙原料として使用
されている天然繊維、合成繊維ならびにこれらの混合物
が用いられ、必要に応じて、バインダー、着色剤などの
添加剤を用いることもできる。The constituent materials of the filter medium include natural fibers, synthetic fibers, and mixtures thereof, which are conventionally used as raw materials for filter paper, and additives such as binders and colorants may be used as necessary. .
濾過材に密度分布を設りる方法どしては、たとえば、１
４に紐密度の異なる濾過材を抄ぎ合わせて−・体化する
方法、性状、繊維分布の異なる抄紙原料スラリーを抄造
工程で段階的に供給して抄紙する方法などがとられ得る
。For example, 1.
4. A method in which filter media with different string densities are combined to form a paper-making material, a method in which papermaking raw material slurries with different properties and fiber distributions are supplied in stages during the papermaking process, etc., may be used.
本発明の濾過材を内燃機関のエアーフィルターやオイル
フィルターに用いる場合は、濾過面積を拡大する上で、
断面が菊花状の円筒形に成形することが好ましく、さら
に端部に円板状金属プレートを接合するか、あるいは樹
脂製プレートを一体成形もしくは接着するなどしてフィ
ルター構造とする。When using the filter material of the present invention for an air filter or oil filter of an internal combustion engine, in order to expand the filtration area,
It is preferable to form the filter into a cylindrical shape with a chrysanthemum-shaped cross section, and further to form a filter structure by joining a disk-shaped metal plate to the end, or integrally molding or gluing a resin plate.
Ｌ！ＬＬａＬ茗１１
本発明の濾過材Ａと従来の濾過材Ｂについて、ＪＩＳ−
Ｄ１６１１に記載された濾過性能試験を行なった場合の
結果を第４図に示す。L! LLaL Myo 11 Regarding the filter medium A of the present invention and the conventional filter medium B, JIS-
The results of the filtration performance test described in D1611 are shown in FIG.
この際の、濾過材の有効濾過面積は１０００ｃｄであり
、流量は１０．１１／分、油温は８０℃である。At this time, the effective filtration area of the filter material was 1000 cd, the flow rate was 10.11/min, and the oil temperature was 80°C.
第４図から明らかなように、本発明の濾過材は、被濾過
流体中のダスト捕捉に伴う圧力損失の増加を、濾過効率
に変動なくゆるやかに進行させることができ、濾過材の
ライフを一層向上させることができる。As is clear from FIG. 4, the filter medium of the present invention can gradually increase the pressure loss caused by dust capture in the fluid to be filtered without any change in filtration efficiency, further extending the life of the filter medium. can be improved.
本発明の濾過材は、厚さ方向と面方向の両方に密度勾配
を設け、しかも被濾過流体の上流側を高密度とし下流側
を低密度としているので、濾過材表面にダストケーキ槽
が形成されやすくなり、このケーキ層のプライマルフィ
ルター効果によって濾過性能とライフの向上を同時に図
ることができる。また、流体中の比較的大寸法の粒子は
、濾材表面で有効に捕捉されて濾過科内部に取り込まれ
るのを防止することができるので、従来の濾過材に比べ
て目づまりを低く抑えることができる。The filter material of the present invention has a density gradient in both the thickness direction and the surface direction, and has a high density on the upstream side of the fluid to be filtered and a low density on the downstream side, so a dust cake tank is formed on the surface of the filter material. The primal filter effect of this cake layer can improve filtration performance and life at the same time. In addition, relatively large particles in the fluid can be effectively captured on the surface of the filter medium and prevented from being taken into the filtration chamber, resulting in lower clogging compared to conventional filter media. .
第１図〜第３図は、各々、本発明の実施例に係る濾過材
の断面概念図であり、第４図は、濾過性能の試験結果を
示すグラフである。
１・・・基材、２・・・気孔。
出願人代理人 猪 股 清
■1 to 3 are conceptual cross-sectional views of filter media according to examples of the present invention, and FIG. 4 is a graph showing test results of filtration performance. 1... base material, 2... pores. Applicant's agent Kiyoshi Inomata■
Claims (1)
過流体の流れの上流側が高密度で下流側が低密度であり
、かつ、濾過材の面方向に対しても高密度部と低密度部
とが散在して形成されてなることを特徴とする、濾過材
。 ２、濾過材の表面または裏面に凹凸が設けられ、前記面
方向における高密度部または低密度部が該凹部または凸
部に形成されてなる、特許請求の範囲第１項に記載の濾
過材。[Claims] 1. In a filter medium having a density gradient in the thickness direction, the upstream side of the flow of the fluid to be filtered has a high density and the downstream side has a low density, and also has a high density in the plane direction of the filter medium. A filtration material characterized by being formed by interspersing dense parts and low density parts. 2. The filtration material according to claim 1, wherein the front or back surface of the filtration material is provided with irregularities, and the high-density portion or low-density portion in the surface direction is formed in the concave portion or convex portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11075485A JPS61268319A (en) | 1985-05-23 | 1985-05-23 | Filter material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11075485A JPS61268319A (en) | 1985-05-23 | 1985-05-23 | Filter material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61268319A true JPS61268319A (en) | 1986-11-27 |
Family
ID=14543711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11075485A Pending JPS61268319A (en) | 1985-05-23 | 1985-05-23 | Filter material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61268319A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5013972A (en) * | 1973-06-08 | 1975-02-13 | ||
| JPS5599315A (en) * | 1979-01-24 | 1980-07-29 | Toray Ind Inc | Filter made of nonwoven fabric |
-
1985
- 1985-05-23 JP JP11075485A patent/JPS61268319A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5013972A (en) * | 1973-06-08 | 1975-02-13 | ||
| JPS5599315A (en) * | 1979-01-24 | 1980-07-29 | Toray Ind Inc | Filter made of nonwoven fabric |
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