JPH10212683A - Production of filter medium - Google Patents
Production of filter mediumInfo
- Publication number
- JPH10212683A JPH10212683A JP1486397A JP1486397A JPH10212683A JP H10212683 A JPH10212683 A JP H10212683A JP 1486397 A JP1486397 A JP 1486397A JP 1486397 A JP1486397 A JP 1486397A JP H10212683 A JPH10212683 A JP H10212683A
- Authority
- JP
- Japan
- Prior art keywords
- filter medium
- raw material
- drying
- weight
- papermaking
- 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
Landscapes
- Filtering Materials (AREA)
- Paper (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車に代表され
る内燃機関用のオイルフィルタやエアフィルタ等として
用いられる濾過材の製造方法に関し、さらに詳しくは厚
み方向に連続した密度勾配を有する濾過材の製造方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a filter medium used as an oil filter or an air filter for an internal combustion engine represented by an automobile, and more particularly, to a filter medium having a density gradient continuous in the thickness direction. And a method for producing the same.
【０００２】[0002]
【従来の技術】厚み方向に連続した密度勾配を有する濾
過材の製造方法として例えば特公昭５３−１７６８７号
公報のほか特開平７−２９９３１５号公報に記載されて
いるものがある。2. Description of the Related Art As a method for producing a filter medium having a density gradient that is continuous in the thickness direction, there is a method described in, for example, Japanese Patent Publication No. 53-17687 and Japanese Patent Application Laid-Open No. 7-299315.
【０００３】前者の技術では、互いに密度の異なる二種
類以上の抄紙原料を各原料が互いに層状で流動する如く
流出せしめるとともに、各原料の相隣り合う層との境界
部に原料相互の混合区域を生ぜしめ、この状態でワイヤ
上に供給しつつ抄紙することを基本としている。In the former technique, two or more kinds of papermaking raw materials having different densities are caused to flow out so that each raw material flows in a laminar form, and a mixing area of the raw materials is formed at a boundary between adjacent raw materials. Basically, paper is produced while being supplied on a wire in this state.
【０００４】他方、後者の技術では、第１段階で抄紙原
料中の水分を所定の脱水力にて強制脱水してワイヤ上に
堆積する繊維密度を高密度に形成する一方、第２段階で
より弱い減圧脱水にてワイヤ上への繊維の堆積につれて
トップサイドの厚み方向に紙層を低密度に形成し、鉄板
ドライヤによる乾燥に先立って、熱風を紙層のトップサ
イドより吹き付けるとともにワイヤサイドより吸引して
予備乾燥させるようにしている。[0004] On the other hand, in the latter technique, in a first stage, water in a papermaking raw material is forcibly dehydrated with a predetermined dehydration force to form a high density of fibers deposited on a wire, while in a second stage, a higher density is obtained. As the fibers are deposited on the wire by weak vacuum dehydration, a paper layer is formed at a low density in the thickness direction of the top side, and hot air is blown from the top side of the paper layer and sucked from the wire side prior to drying with an iron plate dryer And pre-dry it.
【０００５】[0005]
【発明が解決しようとする課題】前者の従来の技術で
は、互いに密度の異なる抄紙原料を二種類以上用意する
必要があり、必然的に原料調合工程が製造上二系統必要
となるため、コストアップを招く結果となって好ましく
ない。In the former conventional technique, it is necessary to prepare two or more kinds of papermaking raw materials having different densities from each other, and inevitably two raw material preparation processes are required in production, so that the cost is increased. Undesirably.
【０００６】また、後者の技術では、抄紙原料は一種類
で済むものの、強制脱水のためのサクションボックスを
二系統に分ける必要があり、前者と同様にしてコストア
ップを招くことになる。In the latter technique, although only one kind of papermaking raw material is required, a suction box for forced dewatering must be divided into two systems, which leads to an increase in cost as in the former case.
【０００７】本発明は以上のような課題に着目してなさ
れたもので、とりわけ厚み方向で連続した密度勾配を有
する濾過材を安価に製造できるようにした方法を提供し
ようとするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a method for manufacturing a filter medium having a density gradient continuous in the thickness direction at a low cost.
【０００８】[0008]
【課題を解決するための手段】請求項１に記載の発明
は、０．０３〜０．１重量％の原料濃度を有する抄紙原
料を抄紙機ワイヤパートのワイヤ上に供給しつつ０．３
〜１ｍの距離で強制吸引脱水を行って抄紙する抄紙工程
と、抄紙後の濾過材を熱風環境下で水分比率が２０〜６
０重量％になるまで非接触状態にて乾燥させる予備乾燥
工程と、予備乾燥後の濾過材を金属製ドライヤにて接触
式で乾燥させる乾燥工程とを含むことを特徴としてい
る。According to the first aspect of the present invention, a papermaking raw material having a raw material concentration of 0.03 to 0.1% by weight is supplied onto a wire of a wire part of a paper machine.
Paper making process in which paper is made by performing forced suction dewatering at a distance of ~ 1 m;
It is characterized by including a pre-drying step of drying in a non-contact state until it becomes 0% by weight, and a drying step of drying the pre-dried filter medium in a contact type with a metal dryer.
【０００９】請求項２に記載の発明は、請求項１に記載
の発明における乾燥後の濾過材に樹脂材料を含浸させる
工程を含むものであることを特徴としている。A second aspect of the present invention is characterized in that the first aspect of the present invention includes a step of impregnating the filter material after drying with a resin material.
【００１０】請求項３に記載の発明は、請求項１または
２に記載の発明における抄紙原料は、細化学繊維を２５
〜７０重量％とするとともに残部を天然繊維として、そ
れらと水とを混合したものであることを特徴としてい
る。According to a third aspect of the present invention, in the first or second aspect of the present invention, the papermaking raw material comprises fine chemical fibers of 25% or less.
７０70% by weight, with the balance being natural fibers, and a mixture of them with water.
【００１１】請求項４に記載の発明は、請求項３に記載
の発明における細化学繊維は１．０デニール以下のポリ
エステル繊維であることを特徴としている。The invention described in claim 4 is characterized in that the fine chemical fiber in the invention described in claim 3 is a polyester fiber of 1.0 denier or less.
【００１２】請求項５に記載の発明は、請求項２〜４の
いずれかに記載の発明における樹脂材料の含浸量が濾過
材を構成する繊維重量の２５〜５０％であることを特徴
としている。A fifth aspect of the present invention is characterized in that the impregnated amount of the resin material according to any one of the second to fourth aspects is 25 to 50% of the weight of the fiber constituting the filter material. .
【００１３】したがって、請求項１に記載の発明では、
強制吸引しているワイヤ上に低濃度の抄紙原料が供給さ
れるため、均一で高密度の層が急速に形成される一方、
その形成された層の濾過抵抗の増大により、さらにその
層の上に形成される脱水力を弱めることになり、結果的
に上層になるほど低密度の層となる。つまり、厚み方向
においてその下層から上層側になるにしたがって連続的
に繊維密度が低くなるような密度勾配をもった構造とな
る。Therefore, according to the first aspect of the present invention,
Since a low concentration of papermaking raw material is supplied on the wire that is forcibly suctioned, a uniform and high-density layer is rapidly formed,
Due to the increase in filtration resistance of the formed layer, the dewatering power formed on the layer is further reduced, and as a result, the layer becomes lower in density as it becomes higher. That is, the structure has a density gradient such that the fiber density continuously decreases from the lower layer to the upper layer in the thickness direction.
【００１４】そして、この抄紙工程に続いて非接触乾燥
である予備乾燥と接触乾燥である金属製ドライヤによる
乾燥とを行うことになるが、水分比率が２０〜６０重量
％になるまで予備乾燥を行うことにより、抄紙工程で形
成された密度勾配形状がそのまま保持され、金属製ドラ
イヤによる接触乾燥時にその密度勾配形状が破壊される
のを防ぐことになる。Following this papermaking step, predrying, which is non-contact drying, and drying using a metal dryer, which is contact drying, are performed. The predrying is performed until the water content becomes 20 to 60% by weight. By doing so, the density gradient shape formed in the papermaking process is maintained as it is, and it is possible to prevent the density gradient shape from being destroyed during contact drying with a metal dryer.
【００１５】特に請求項２に記載の発明のように、後処
理として樹脂材料を含浸させることにより、その密度勾
配形状の保形性，保持力が一段とよくなり、例えばフィ
ルタエレメント等として折り加工する場合でもその密度
勾配形状が破壊されることがない。In particular, by impregnating a resin material as a post-treatment, the shape retention property and the holding power of the density gradient shape are further improved. Even in this case, the density gradient shape is not destroyed.
【００１６】また、請求項３，４に記載の発明のよう
に、抄紙原料に２５〜７０重量％のポリエステル等の細
化学繊維が含まれている場合には、抄紙原料の主体であ
る天然繊維（パルプ）がその親水性のために、水分乾燥
時の水の表面張力により収縮して密度勾配形状を破壊し
ようとしても、これに細化学繊維が対抗して、当初から
の密度勾配形状を保持する。In the case where the papermaking raw material contains 25 to 70% by weight of fine chemical fibers such as polyester as in the invention according to claims 3 and 4, the natural fiber which is the main component of the papermaking raw material is used. Due to its hydrophilicity, (pulp) shrinks due to the surface tension of water during moisture drying and destroys the density gradient shape, but fine chemical fibers oppose this and maintain the density gradient shape from the beginning. I do.
【００１７】[0017]
【発明の実施の形態】図１，２は本発明の代表的な実施
の形態を示す図であって、１は抄紙原料が収容される原
料槽、２は原料供給用のヘッドボックス、３は脱水用の
サクションボックス、４，５はワイヤパートのワイヤ送
りドラム、６はワイヤ、７は熱風乾燥炉、８は熱風乾燥
炉７の後段側に設けられて、複数の鋳鉄ドラム９，９…
によって構成されるドラム式のドライヤである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show a typical embodiment of the present invention, wherein 1 is a raw material tank for accommodating papermaking raw materials, 2 is a head box for supplying raw materials, and 3 is a raw material supply box. A suction box for dehydration, 4, 5 are wire feed drums of a wire part, 6 is a wire, 7 is a hot air drying furnace, 8 is provided on the subsequent stage of the hot air drying furnace 7, and a plurality of cast iron drums 9, 9,.
Is a drum type dryer.
【００１８】抄紙原料としては、１．０デニール以下の
細化学繊維を２５重量％以上、望ましくは２０〜７０重
量％とするとともに、残部を天然繊維として、これらを
原料混合槽にて０．１重量％以下、望ましくは０．０３
〜０．１重量％となるように水と混合した上で、原料槽
１に供給する。As the papermaking raw material, fine chemical fibers having a density of 1.0 denier or less are contained in an amount of 25% by weight or more, preferably 20 to 70% by weight. Wt% or less, desirably 0.03
After being mixed with water so as to be 0.1% by weight, the mixture is supplied to the raw material tank 1.
【００１９】原料槽１からヘッドボックス２を経て抄紙
原料をワイヤパートのワイヤ６上に順次供給し、サクシ
ョンボックス３による吸引距離Ｌを１ｍ以下、望ましく
は吸引距離Ｌを０．３〜１ｍとして、該サクションボッ
クス３にて強制吸引脱水を行いながら抄紙する。そし
て、抄紙後の繊維層がドライヤ８を通過する過程で順次
乾燥されて濾過材Ｗとなるが、ドライヤ８による乾燥に
先立って、抄紙直後の繊維層（濾過材Ｗ）を熱風乾燥炉
７にて水分比率が６０重量％以下、望ましくは２０〜６
０重量％になるまで非接触にて予備乾燥させる。The papermaking raw material is sequentially supplied from the raw material tank 1 through the head box 2 onto the wire 6 of the wire part, and the suction distance L by the suction box 3 is 1 m or less, preferably 0.3 to 1 m. Paper is made while performing forced suction dehydration in the suction box 3. Then, the fiber layer after the paper making is sequentially dried in the process of passing through the dryer 8 to become the filter material W. Prior to the drying by the dryer 8, the fiber layer immediately after the paper making (the filter material W) is passed through the hot air drying furnace 7. And the water content is 60% by weight or less, preferably 20 to 6%.
It is pre-dried in a non-contact manner to 0% by weight.
【００２０】この予備乾燥は、所定のブース１０内を通
過する濾過材Ｗに対して例えば１００〜１５０℃程度の
熱風を均一に吹き付けることにより行う。The preliminary drying is performed by uniformly blowing hot air of, for example, about 100 to 150 ° C. on the filter medium W passing through a predetermined booth 10.
【００２１】すなわち抄紙過程では、強制吸引している
ワイヤ６に濃度が低い抄紙原料が供給されるために、下
層ほど均一で高密度の層が形成されて、その上に形成さ
れる中層または上層側の強制吸引力を弱めることにな
る。これにより、濾過材Ｗとしては上層ほど低密度の層
となって、結果的には下層側から上層側になるにしたが
って連続的に密度が低くなるような密度勾配を有するこ
とになる。That is, in the papermaking process, since the papermaking raw material having a low concentration is supplied to the wire 6 being forcibly sucked, the lower layer is formed as a uniform and high-density layer, and the middle or upper layer formed thereon is formed. The side will weaken the forced suction force. As a result, the upper layer of the filter medium W has a lower density, and consequently has a density gradient such that the density continuously decreases from the lower layer to the upper layer.
【００２２】このようにして抄紙された濾過材Ｗを従来
のように接触式の乾燥形態であるドライヤ８にていきな
り乾燥させると、先に形成された連続的な密度勾配形状
が破壊されてしまうことから、それに先立って熱風乾燥
炉７にて２０〜６０重量％の水分比率になるまで非接触
にて乾燥させる。When the filter material W thus formed is dried suddenly by the dryer 8 which is a contact-type drying mode as in the past, the previously formed continuous density gradient shape is destroyed. For this reason, prior to this, it is dried in a hot air drying furnace 7 in a non-contact manner until the water content becomes 20 to 60% by weight.
【００２３】ここで、抄紙原料の原料濃度を０．０３〜
０．１重量％としているのは、それ以上濃くすると、抄
紙原料中の繊維間距離が短くなり、下層部と上層部との
間の脱水力の差が小さくなり、結果的に濾過材Ｗの厚み
方向での密度差が小さくなってしまうためである。Here, the raw material concentration of the papermaking raw material is 0.03 to 0.03.
The reason why the concentration is set to 0.1% by weight is that if the concentration is further increased, the distance between the fibers in the papermaking raw material is shortened, and the difference in the dewatering power between the lower layer and the upper layer is reduced. This is because the density difference in the thickness direction becomes small.
【００２４】そして、上記のドライヤ８を経た濾過材Ｗ
に、後処理として例えばフェノール樹脂等の樹脂材料を
含浸させる（目付け）。この樹脂材料の含浸は、後工程
での折り加工等に際して密度勾配形状を維持するために
行われるもので、濾過材Ｗを構成する繊維重量の２５％
以上、望ましくは２５〜５０％の範囲の樹脂目付け量と
する。Then, the filter medium W having passed through the above-described dryer 8
Then, a resin material such as a phenol resin is impregnated as a post-treatment (basis weight). This impregnation of the resin material is performed in order to maintain the density gradient shape at the time of folding or the like in a later step, and is 25% of the fiber weight constituting the filter material W.
As described above, the resin weight is preferably in the range of 25 to 50%.
【００２５】こうして得られた濾過材Ｗは、後工程で折
り加工等が施されて、例えば内燃機関用のオイルフィル
タ、フューエルフィルタあるいはエアフィルタ等に加工
される。The filter material W thus obtained is subjected to folding and the like in a later step and processed into, for example, an oil filter, a fuel filter, an air filter, or the like for an internal combustion engine.
【００２６】実施例として、０．５デニールのポリエス
テル繊維を２８重量％、天然繊維（パルプ）を７２重量
％それぞれ含むような原料濃度０．０７重量％の抄紙原
料を用いて、サクションボックス３による吸引距離Ｌが
０．７５ｍ、予備乾燥後の水分比率が６０重量％となる
ような条件のもとで濾過材Ｗを作製した。その濾過材Ｗ
の断面を図３に示す。この時、濾過材Ｗの下層部分ＷL
の密度が０．１６ｇ／ｃｍ3であるのに対して、上層部
分ＷUではその密度が０．０６ｇ／ｃｍ3であった。As an example, a suction box 3 was used by using a papermaking raw material having a raw material concentration of 0.07% by weight containing 28% by weight of 0.5 denier polyester fiber and 72% by weight of natural fiber (pulp). The filter medium W was manufactured under the conditions that the suction distance L was 0.75 m and the moisture ratio after preliminary drying was 60% by weight. The filter material W
3 is shown in FIG. Lower portion W L of this time, the filtering material W
Relative density in the range of 0.16 g / cm 3, its density in the upper portion W U was 0.06 g / cm 3.
【００２７】また、細化学繊維（ポリエステル繊維）の
比率が高いほど、また予備乾燥終了時点の水分比率が小
さいほど、厚み方向での密度勾配が大きくなることが判
明した。It was also found that the higher the ratio of fine chemical fibers (polyester fibers) and the lower the water content at the end of predrying, the greater the density gradient in the thickness direction.
【００２８】これは、抄紙原料の主体であるパルプが、
その親水性のために、水分乾燥時の水の表面張力によっ
て収縮して密度勾配形状を破壊しようとするのに対し
て、細化学繊維はパルプほど乾燥収縮せず、結果的に細
化学繊維が当初の密度勾配形状を保持するように機能す
るためである。This is because pulp, which is the main component of papermaking raw material,
Due to its hydrophilicity, it shrinks due to the surface tension of water at the time of moisture drying and tries to destroy the density gradient shape, whereas fine chemical fibers do not shrink as dry as pulp, resulting in fine chemical fibers This is because it functions so as to maintain the original density gradient shape.
【００２９】[0029]
【発明の効果】請求項１に記載の発明によれば、０．０
３〜０．１重量％の原料濃度を有する抄紙原料を抄紙機
ワイヤパートのワイヤ上に供給しつつ０．３〜１ｍの距
離で強制吸引脱水を行って抄紙する処紙工程と、抄紙後
の濾過材を熱風環境下で水分比率が２０〜６０重量％に
なるまで非接触状態に乾燥させる予備乾燥工程と、予備
乾燥後の濾過材を金属製ドライヤにて接触式で乾燥させ
る乾燥工程とを含むものであるから、一種類の抄紙原料
と一台の抄紙機を用いるのみで、厚み方向で連続した密
度勾配を有する濾過材を製造することができ、生産性の
向上と併せて濾過材のコストダウンを図ることができる
効果がある。According to the first aspect of the present invention, 0.0%
A papermaking process in which a papermaking raw material having a raw material concentration of 3 to 0.1% by weight is supplied onto a wire of a paper machine wire part and subjected to forced suction dehydration at a distance of 0.3 to 1 m to make paper; A pre-drying step of drying the filter medium in a non-contact state until the water content becomes 20 to 60% by weight under a hot air environment; and a drying step of drying the filter medium after pre-drying in a contact type with a metal dryer. Therefore, only one kind of papermaking raw material and one papermaking machine can be used to produce a filter medium with a density gradient that is continuous in the thickness direction. There is an effect that can be achieved.
【００３０】特に請求項２に記載の発明のように、後処
理として樹脂材料を含浸させた場合には、密度勾配形状
の保形性が一段と向上する効果がある。In particular, when a resin material is impregnated as a post-treatment as in the second aspect of the invention, there is an effect that the shape retention of the density gradient shape is further improved.
【００３１】また、請求項３，４に記載の発明によれ
ば、抄紙原料として天然繊維以外にポリエステル繊維等
の細化学繊維を含んでいることにより、親水性のよい天
然繊維が乾燥収縮して密度勾配形状を破壊しようとして
も、それに細化学繊維が対抗することから、上記の密度
勾配形状の保形性が一段と向上する効果がある。According to the third and fourth aspects of the present invention, since fine paper fibers such as polyester fibers are contained in addition to natural fibers as a raw material for papermaking, natural fibers having good hydrophilicity are dried and shrunk. Even if an attempt is made to destroy the density gradient shape, fine chemical fibers oppose it, so that the shape retention of the density gradient shape is further improved.
【００３２】さらに、請求項５に記載の発明によれば、
樹脂含浸量として、濾過材を構成する繊維重量の２５〜
５０％に設定したことにより、樹脂自体の保形効果のた
めに密度勾配形状の保形性が一段と向上する効果があ
る。Further, according to the invention described in claim 5,
As the resin impregnation amount, 25 to 25% of the fiber weight constituting the filter material
By setting it to 50%, there is an effect that the shape retention of the density gradient shape is further improved due to the shape retention effect of the resin itself.
【図１】本発明の代表的な実施の形態を示す工程説明
図。FIG. 1 is a process explanatory view showing a typical embodiment of the present invention.
【図２】図１の要部拡大図。FIG. 2 is an enlarged view of a main part of FIG.
【図３】本発明方法によって製造された濾過材の模式的
な拡大断面図。FIG. 3 is a schematic enlarged sectional view of a filter medium manufactured by the method of the present invention.
１…原料槽 ３…サクションボックス ６…ワイヤ ７…熱風乾燥炉 ８…ドライヤ Ｌ…吸引距離 Ｗ…濾過材 DESCRIPTION OF SYMBOLS 1 ... Raw material tank 3 ... Suction box 6 ... Wire 7 ... Hot air drying furnace 8 ... Dryer L ... Suction distance W ... Filter material
Claims (5)
する抄紙原料を抄紙機ワイヤパートのワイヤ上に供給し
つつ０．３〜１ｍの距離で強制吸引脱水を行って抄紙す
る抄紙工程と、 抄紙後の濾過材を熱風環境下で水分比率が２０〜６０重
量％になるまで非接触状態にて乾燥させる予備乾燥工程
と、 予備乾燥後の濾過材を金属製ドライヤにて接触式で乾燥
させる乾燥工程と、 を含むことを特徴とする濾過材の製造方法。1. A papermaking method in which a papermaking raw material having a raw material concentration of 0.03 to 0.1% by weight is supplied onto a wire of a paper machine wire part and subjected to forced suction dehydration at a distance of 0.3 to 1 m to make paper. A pre-drying step of drying the filter material after papermaking in a non-contact state until the water content becomes 20 to 60% by weight in a hot air environment; and a contact type of the filter material after pre-drying with a metal dryer. A method for producing a filtering material, comprising:
工程を含むものであることを特徴とする請求項１記載の
濾過材の製造方法。2. The method according to claim 1, further comprising a step of impregnating the filter material after drying with a resin material.
０重量％とするとともに残部を天然繊維として、それら
と水とを混合したものであることを特徴とする請求項１
または２記載の濾過材の製造方法。3. The papermaking raw material comprises fine chemical fibers of 25-7.
2. A mixture of water and water, with the balance being 0% by weight and the balance being natural fibers.
Or the manufacturing method of the filter medium of 2.
ポリエステル繊維であることを特徴とする請求項３記載
の濾過材の製造方法。4. The method according to claim 3, wherein the fine chemical fiber is a polyester fiber of 1.0 denier or less.
繊維重量の２５〜５０％であることを特徴とする請求項
２〜４のいずれかに記載の濾過材の製造方法。5. The method for producing a filter medium according to claim 2, wherein the impregnation amount of the resin material is 25 to 50% of the weight of the fibers constituting the filter medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1486397A JPH10212683A (en) | 1997-01-29 | 1997-01-29 | Production of filter medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1486397A JPH10212683A (en) | 1997-01-29 | 1997-01-29 | Production of filter medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10212683A true JPH10212683A (en) | 1998-08-11 |
Family
ID=11872873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1486397A Pending JPH10212683A (en) | 1997-01-29 | 1997-01-29 | Production of filter medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10212683A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003159507A (en) * | 2001-11-27 | 2003-06-03 | Hokuetsu Paper Mills Ltd | Filter medium for air filter |
| JP2007260623A (en) * | 2006-03-29 | 2007-10-11 | Toyota Boshoku Corp | Method of manufacturing filter element |
| JP2010077585A (en) * | 2008-09-19 | 2010-04-08 | Pall Filtersystems Gmbh | Depth filter sheet material, and method for producing the same |
| CN102301049A (en) * | 2009-01-28 | 2011-12-28 | 唐纳森公司 | Fibrous media and method and apparatus for forming same |
| WO2014196357A1 (en) * | 2013-06-03 | 2014-12-11 | 王子ホールディングス株式会社 | Production method for fine-fibre-containing sheet |
| US9121118B2 (en) | 2011-01-28 | 2015-09-01 | Donaldson Company, Inc. | Method and apparatus for forming a fibrous media |
| US9303339B2 (en) | 2011-01-28 | 2016-04-05 | Donaldson Company, Inc. | Method and apparatus for forming a fibrous media |
-
1997
- 1997-01-29 JP JP1486397A patent/JPH10212683A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003159507A (en) * | 2001-11-27 | 2003-06-03 | Hokuetsu Paper Mills Ltd | Filter medium for air filter |
| JP2007260623A (en) * | 2006-03-29 | 2007-10-11 | Toyota Boshoku Corp | Method of manufacturing filter element |
| JP4736898B2 (en) * | 2006-03-29 | 2011-07-27 | トヨタ紡織株式会社 | Manufacturing method of filter element |
| JP2010077585A (en) * | 2008-09-19 | 2010-04-08 | Pall Filtersystems Gmbh | Depth filter sheet material, and method for producing the same |
| US9885154B2 (en) | 2009-01-28 | 2018-02-06 | Donaldson Company, Inc. | Fibrous media |
| JP2012516399A (en) * | 2009-01-28 | 2012-07-19 | ドナルドソン カンパニー，インコーポレイティド | Fiber medium and method and apparatus for forming the same |
| JP2015044200A (en) * | 2009-01-28 | 2015-03-12 | ドナルドソン カンパニー，インコーポレイティド | Fiber medium and method and device for forming the same |
| US9353481B2 (en) | 2009-01-28 | 2016-05-31 | Donldson Company, Inc. | Method and apparatus for forming a fibrous media |
| CN102301049A (en) * | 2009-01-28 | 2011-12-28 | 唐纳森公司 | Fibrous media and method and apparatus for forming same |
| JP2018150671A (en) * | 2009-01-28 | 2018-09-27 | ドナルドソン カンパニー，インコーポレイティド | Fiber media and forming method and device thereof |
| US10316468B2 (en) | 2009-01-28 | 2019-06-11 | Donaldson Company, Inc. | Fibrous media |
| US9121118B2 (en) | 2011-01-28 | 2015-09-01 | Donaldson Company, Inc. | Method and apparatus for forming a fibrous media |
| US9303339B2 (en) | 2011-01-28 | 2016-04-05 | Donaldson Company, Inc. | Method and apparatus for forming a fibrous media |
| WO2014196357A1 (en) * | 2013-06-03 | 2014-12-11 | 王子ホールディングス株式会社 | Production method for fine-fibre-containing sheet |
| JPWO2014196357A1 (en) * | 2013-06-03 | 2017-02-23 | 王子ホールディングス株式会社 | Method for producing fine fiber-containing sheet |
| US10697118B2 (en) | 2013-06-03 | 2020-06-30 | Oji Holdings Corporation | Method for producing sheet containing fine fibers |
| US11542659B2 (en) | 2013-06-03 | 2023-01-03 | Oji Holdings Corporation | Method for producing sheet containing fine fibers |
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