JPH0959859A - Nonwoven fabric for liquid filter and liquid filtering apparatus obtained by using the same - Google Patents
Nonwoven fabric for liquid filter and liquid filtering apparatus obtained by using the sameInfo
- Publication number
- JPH0959859A JPH0959859A JP12499196A JP12499196A JPH0959859A JP H0959859 A JPH0959859 A JP H0959859A JP 12499196 A JP12499196 A JP 12499196A JP 12499196 A JP12499196 A JP 12499196A JP H0959859 A JPH0959859 A JP H0959859A
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- filter
- liquid
- woven fabric
- surface roughness
- 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)
- Multicomponent Fibers (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液体濾過、たとえ
ば放電加工機用フィルター等でのフィルター交換直後に
発生する濾過性能の低い状態（初期洩れ）を大幅に改善
した高寿命の液体フィルター用不織布およびそれからな
る液体濾過装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-woven fabric for a liquid filter having a long life, in which the state of low filtration performance (initial leakage) which occurs immediately after the filter is replaced by liquid filtration, such as a filter for an electric discharge machine, is greatly improved. And a liquid filtering device comprising the same.
【０００２】[0002]
【従来の技術】放電加工機等に使用されるフィルター基
材は、一般に、プリーツ加工を施し、フィルターユニッ
ト中での表面積を大きくし、濾過機能を高めたものが使
用される。そこで、使用されるフィルター基材にはプリ
ーツ加工が可能である必要があり、不織布にその特性を
持たすためには、不織布を部分的に圧着し、ある程度の
硬さや強力を持たす必要がある。また、濾過性能を満足
させるために、不織布の見掛密度を高めたり、目付の高
い不織布を使用する。2. Description of the Related Art Generally, a filter base material used in an electric discharge machine or the like is one which has been subjected to pleating so as to have a large surface area in a filter unit and an improved filtering function. Therefore, it is necessary that the filter base material used can be pleated, and in order to give the nonwoven fabric its characteristics, it is necessary to partially press-bond the nonwoven fabric to have a certain degree of hardness and strength. Further, in order to satisfy the filtration performance, the apparent density of the non-woven fabric is increased, or a non-woven fabric having a high basis weight is used.
【０００３】そこで従来から、この機能を満足させるた
めに、液体フィルター用不織布として、一部、共重合ポ
リエステル成分を含むポリエステル連続フィラメントか
らなる部分的に圧着した不織布を使用することが知られ
ている。Therefore, in order to satisfy this function, it has been conventionally known to use, as a nonwoven fabric for liquid filters, a partially pressure-bonded nonwoven fabric composed of polyester continuous filaments partially containing a copolyester component. .
【０００４】この不織布は通常紡糸口金から、溶融紡出
された連続フィラメントをエアーサッカー等の手段によ
り吸引延伸し、移動する網状体の上に開繊堆積させ連続
フィラメントウェブとし、次いで同ウェブを部分的に熱
圧着するという方法で得られている。This non-woven fabric is usually drawn from a spinneret with melt-spun continuous filaments by suction drawing by means such as air sucker and spread on a moving mesh to form a continuous filament web. It is obtained by thermocompression bonding.
【０００５】[0005]
【発明が解決しようとする課題】ところが、このような
従来の液体フィルター用不織布では、放電加工機用フィ
ルター等に使用した場合、フィルター交換直後の初期洩
れ状態が長く続くため、実用上の問題がなくなるまで予
備運転を行い、濾過可能となるまでスラッジによる濾過
層の形成が必要であった。However, when such a conventional nonwoven fabric for liquid filters is used as a filter for an electric discharge machine or the like, there is a problem in practical use since the initial leakage state immediately after replacement of the filter continues for a long time. It was necessary to carry out a preliminary operation until there was no more, and to form a filter layer with sludge until filtration became possible.
【０００６】本発明は、前記問題を解決し、フィルター
交換直後の初期洩れがなく、予備運転することなく実用
でき、放電加工機用フィルターとしても十分な性能を持
った高寿命の液体フィルター用不織布およびそれからな
る液体濾過装置を提供しようとするものである。The present invention solves the above problems, has no initial leakage immediately after filter replacement, can be put to practical use without preliminary operation, and has a long-life non-woven fabric for a liquid filter having sufficient performance as a filter for an electric discharge machine. And a liquid filtering device comprising the same.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、かかる課
題を解決すべく、次のような構成を採用する。すなわち
本発明の液体フィルター用不織布は、部分的に圧着され
た不織布であって、該不織布の見掛密度が０．５未満で
あり、かつ、少なくとも一方の面の、ＪＩＳＢ−０６０
１に準じて測定される該圧着部のくぼみの平均深さから
求められる表面粗さ指数が０．１以下であることを特徴
とするものである。また、本発明の液体濾過装置は、か
かる不織布を液体濾過装置のフィルター部材として構成
したことを特徴とするものである。The present inventors adopt the following structure in order to solve such a problem. That is, the nonwoven fabric for liquid filters of the present invention is a partially pressure-bonded nonwoven fabric, and the apparent density of the nonwoven fabric is less than 0.5, and JISB-060 of at least one surface
The surface roughness index obtained from the average depth of the depressions in the crimped portion measured according to 1 is 0.1 or less. Further, the liquid filtering device of the present invention is characterized in that the nonwoven fabric is configured as a filter member of the liquid filtering device.
【０００８】[0008]
【発明の実施の形態】本発明は、液体フィルターの濾過
面として使用する不織布表面の圧着部の深さが、液体濾
過での初期洩れ状態に大きく影響を与えることを究明し
て完成されたものである。具体的には、該フィルターの
圧着部の形状、構造を特定なものにすると、開始時のス
ラッジによる濾過層が極めて容易に形成されること、そ
れによって、初期洩れ時間を著しく短縮することを究明
したものである。BEST MODE FOR CARRYING OUT THE INVENTION The present invention has been completed by clarifying that the depth of a pressure-bonded portion on the surface of a non-woven fabric used as a filtration surface of a liquid filter has a great influence on an initial leak state in liquid filtration. Is. Specifically, it was clarified that when the crimping part of the filter had a specific shape and structure, the filter layer was formed by the sludge at the start very easily, thereby significantly reducing the initial leak time. It was done.
【０００９】すなわち、かかる不織布の該圧着部のくぼ
みの深さと、初期洩れとの関係を検討したところ、該く
ぼみの平均深さが初期洩れと関係が深いことを究明し、
さらには、ＪＩＳ−Ｂ０６０１に準じ測定した算術平均
粗さ、たとえば、一般に、金属等の表面状態を確認する
ために使用される表面粗さを測定する、ＪＩＳ−Ｂ０６
５１の触針式表面粗さ測定器の規格に基づく（株）小坂
研究所製表面粗さ計ＳＥ−４０Ｃを用いて測定すること
ができるくぼみの平均深さが、密接に関係することを究
明した。すなわち、不織布のかかる圧着部のくぼみの深
さ度合を表す指数、具体的には、かかるくぼみの平均深
さを、該不織布の厚さで除して表される表面粗さ指数
が、０．１以下にすることが重要であることに到達した
ものである。すなわち、かかる表面粗さ指数を、０．１
以下とすることで、従来の不織布に比べ大幅に初期洩れ
時間を短くできることを見出した。That is, when the relationship between the depth of the depression of the crimped portion of the non-woven fabric and the initial leakage was examined, it was found that the average depth of the depression is closely related to the initial leakage,
Furthermore, the arithmetic average roughness measured according to JIS-B0601, for example, the surface roughness generally used for confirming the surface state of metal or the like is measured, JIS-B06.
It was clarified that the average depth of the indentations that can be measured using the surface roughness meter SE-40C manufactured by Kosaka Laboratory, which is based on the standard of 51 stylus surface roughness measuring instrument, is closely related. did. That is, an index representing the depth of the depressions in the crimped portion of the nonwoven fabric, specifically, the surface roughness index represented by dividing the average depth of the depressions by the thickness of the nonwoven fabric is 0. It has come to the point that it is important to be 1 or less. That is, the surface roughness index is 0.1
By the following, it was found that the initial leak time can be significantly shortened as compared with the conventional nonwoven fabric.
【００１０】表面粗さ指数が０．１を越えると、初期洩
れ時間が幾何級数的に大きくなっていき、液体フィルタ
ーとして適さない。表面粗さ指数を小さくすることは、
フィルター濾過面の凹凸及び表面積が小さくなることで
あり、濾過に必要なスラッジ層の形成が容易になること
を意味する。更に、圧着部の構造がルーズになっている
ため、実質的な濾過部分が拡大し、寿命性能の向上が達
成できるものである。本発明の基本思想は、液体フィル
ターの濾過面として使用する不織布表面の圧着部の深さ
を浅くし、使用開始時のスラッジによる濾過層の形成を
容易にし、初期洩れ時間を短縮することにある。When the surface roughness index exceeds 0.1, the initial leak time becomes geometrically long and it is not suitable as a liquid filter. To reduce the surface roughness index,
The unevenness and surface area of the filtration surface of the filter are reduced, which means that the formation of a sludge layer necessary for filtration is facilitated. Furthermore, since the structure of the crimping portion is loose, the substantial filtering portion is enlarged, and the life performance can be improved. The basic idea of the present invention is to reduce the depth of the pressure-bonded portion on the surface of the non-woven fabric used as the filtration surface of the liquid filter, to facilitate the formation of the filtration layer by the sludge at the start of use, and to reduce the initial leak time. .
【００１１】本発明で言う部分的に圧着された不織布と
は、不織布を構成している連続フィラメント間が熱と圧
力によって融着し、部分的にくぼみがあること、即ち、
フィラメント密度が高くなった部分が点在することを言
う。このように、部分的に圧着するためには、通常、加
熱した一対のエンボスロールが使用されるが、本発明に
おいては、エンボスロールの形態、組合わせ等について
特に規制するものではない。また、圧着部の不織布全体
の面積に占める割合も、特に規制するものではないが、
より少ない方が好ましく、たとえば、好ましくは１０〜
３０％。さらに好ましくは１５〜２０％の範囲で占める
のがよい、具体的には、たとえば圧着部面積が０．５〜
１．５mm2 である場合、好ましくは１０〜５０個／c
m2 、さらに好ましくは２５〜３５個／cm2 の範囲がよ
い。The partially pressure-bonded non-woven fabric as referred to in the present invention means that continuous filaments constituting the non-woven fabric are fused by heat and pressure to have a partial depression, that is,
It is said that the parts where the filament density is high are scattered. As described above, a pair of heated embossing rolls is usually used to partially press-bond, but in the present invention, the form, combination, and the like of the embossing rolls are not particularly limited. Also, the ratio of the pressure-bonded portion to the entire area of the nonwoven fabric is not particularly limited,
It is preferably less, for example, preferably 10
30%. It is more preferable to occupy in the range of 15 to 20%. Specifically, for example, the area of the pressure-bonded portion is 0.5 to 20%.
When it is 1.5 mm 2 , preferably 10 to 50 pieces / c
m 2 is more preferable, and a range of 25 to 35 pieces / cm 2 is more preferable.
【００１２】本発明で言う見掛密度とは、不織布の目付
を厚さで割った値であり、目付及び厚さについては、Ｊ
ＩＳの一般長繊維不織布試験方法に準ずる。The apparent density referred to in the present invention is a value obtained by dividing the weight per unit area of the nonwoven fabric by the thickness.
This is based on the IS general non-woven fabric test method.
【００１３】見掛密度が０．５以上の場合は、液体フィ
ルターとして使用した場合、圧損が大きくなるため目詰
まりが早くなり、フィルターの寿命性能が大幅に短くな
る。一般に、空隙が小さいフィルターは、圧力損失が非
常に大きくなることから液体用フィルターには適さな
い。When the apparent density is 0.5 or more, when it is used as a liquid filter, pressure loss becomes large, clogging is accelerated, and the life performance of the filter is significantly shortened. Generally, a filter having a small void is not suitable for a liquid filter because the pressure loss becomes very large.
【００１４】本発明のフィルター用不織布は、好ましく
はフィラメント、さらにはポリエステル系フィラメント
で構成されており、特に好ましくはポリエステル系複合
フィラメント、それも芯鞘構造を有する複合フィラメン
トがよい。かかる複合フィラメントとしては、鞘部分が
芯成分に対し２０℃以上低い融点を持つ共重合ポリエス
テルから成ることが、目付の高い不織布を得る上で非常
に有効である。更に、芯鞘構造とは、一般的な同心円が
最も好ましいが、偏芯円形、異型断面型としても良い。
また、かかるポリエステル系フィラメントに酸化チタ
ン、カーボンブラック等の添加剤を含んでもよいことは
言うまでもない。本発明の共重合ポリエステル成分と
は、アジピン酸、イソフタル酸、等を共重合したポリエ
ステルであり、酸化チタン、カーボンブラック等の添加
剤を含んでもよいことは言うまでもない。The non-woven fabric for a filter of the present invention is preferably composed of filaments and further polyester type filaments, particularly preferably polyester type composite filaments, which are also composite filaments having a core-sheath structure. As such a composite filament, it is very effective that the sheath portion is made of a copolyester having a melting point lower than that of the core component by 20 ° C. or more in order to obtain a nonwoven fabric having a high basis weight. Further, the core-sheath structure is most preferably a general concentric circle, but may be an eccentric circular shape or an irregular cross-sectional shape.
Needless to say, the polyester filament may contain an additive such as titanium oxide or carbon black. It goes without saying that the copolyester component of the present invention is a polyester obtained by copolymerizing adipic acid, isophthalic acid, etc., and may contain an additive such as titanium oxide or carbon black.
【００１５】本発明のかかる液体フィルター用不織布
を、たとえば、放電加工機用フィルター装置に使用する
と、フィルター交換直後に発生する濾過性能の低い状態
（初期洩れ）を大幅に改善でき、かつ、高寿命の液体濾
過装置を提供することができるものである。When the non-woven fabric for a liquid filter according to the present invention is used, for example, in a filter device for an electric discharge machine, a state of low filtration performance (initial leakage) which occurs immediately after replacement of the filter can be remarkably improved and a long service life can be obtained. It is possible to provide the liquid filtering device of.
【００１６】[0016]
【実施例】次に、実施例に基づいて本発明を具体的に説
明する。なお、実施例における各種特性は次の方法によ
り測定した。Next, the present invention will be specifically described based on examples. Various characteristics in the examples were measured by the following methods.
【００１７】見掛密度：（目付）／（厚さ）により算出
する（単位： g／cm3 ）。Apparent density: Calculated by (weight per unit area) / (thickness) (unit: g / cm 3 ).
【００１８】目付及び厚さの測定は、一般長繊維不織布
試験方法（ＪＩＳ−Ｌ１９０６）に準ずる。The unit weight and the thickness are measured according to the general long-fiber nonwoven fabric test method (JIS-L1906).
【００１９】表面粗さ指数：（くぼみの平均深さ）／
（厚さ）により算出する。Surface roughness index: (average depth of depression) /
It is calculated by (thickness).
【００２０】くぼみの平均深さは、表面粗さ測定器
（（株）小坂研究所製表面粗さ計ＳＥ−４０Ｃ：ＪＩＳ
−Ｂ０６５１の触針式表面粗さ測定器の規格に基づく）
を使用して、ＪＩＳ−Ｂ０６０１の表面粗さ規格に準じ
て求められる算術平均粗さ（Ｒａ）を表す。算術平均粗
さは、カットオフ値２．５mm，評価長さ８mmで測定し
た。 フィルター性能：計量ポンプを備えた濾過装置に、以下
の条件で、初期性能を評価した。The average depth of the depressions is a surface roughness measuring instrument (manufactured by Kosaka Laboratory Ltd., surface roughness meter SE-40C: JIS).
-Based on the standard of the stylus type surface roughness measuring instrument of B0651)
Is used to represent the arithmetic mean roughness (Ra) determined according to the surface roughness standard of JIS-B0601. The arithmetic mean roughness was measured with a cutoff value of 2.5 mm and an evaluation length of 8 mm. Filter performance: The initial performance was evaluated under the following conditions in a filtration device equipped with a metering pump.
【００２１】試料の大きさ ：５０mm径 スラッジの種類：ＪＩＳ１１種＋ＪＩＳ８種（重量比
７：３） スラッジの濃度：０．１ g／ｌ（水） 押出流量 ：２００ml／min. 評価尺度 初期洩れ評価：褐色液が無色透明になるまでの時間（単
位：ＳＥＣ．） 寿命性能評価：圧損２kg／cm2 に到達するまでの時間
（単位：ＳＥＣ．） 実施例１、２、３ 融点が２６０℃のポリエチレンテレフタレ−トを芯成分
とし、融点が２３０℃のイソフタル酸共重合ポリエステ
ルを鞘成分とし、芯成分と鞘成分の重量比を８：２とし
た複合連続フィラメントを単糸繊度２ｄで溶融紡出し、
空気圧により開繊した後、移動するネット上に堆積さ
せ、１対の加熱エンボスロールを使用し、表面温度２０
０℃、線圧それぞれ５０、６０、７０Kg／cmで圧着し、
目付２７０g／ｍ2 、厚さ０．６mmの不織布を得た。こ
れら不織布の見掛密度は０．４５であり、不織布の一方
の面の表面粗さ指数は、それぞれ０．０４、０．０６、
０．０８であった。Sample size: 50 mm diameter Sludge type: JIS type 11 + JIS type 8 (weight ratio 7: 3) Sludge concentration: 0.1 g / l (water) Extrusion flow rate: 200 ml / min. Evaluation scale Initial leakage evaluation : Time until brown liquid becomes colorless and transparent (unit: SEC.) Life performance evaluation: Time until pressure loss reaches 2 kg / cm 2 (unit: SEC.) Examples 1, 2, 3 Melting point: 260 ° C Melt-spun composite continuous filament with polyethylene terephthalate as core component, isophthalic acid copolyester having melting point of 230 ° C. as sheath component, and weight ratio of core component to sheath component of 8: 2 with single yarn fineness 2d. broth,
After the fibers are opened by air pressure, they are deposited on a moving net, and a surface temperature of 20 is used by using a pair of heated embossing rolls.
Crimping at 0 ° C and linear pressure of 50, 60 and 70 kg / cm,
A nonwoven fabric having a basis weight of 270 g / m 2 and a thickness of 0.6 mm was obtained. The apparent density of these non-woven fabrics is 0.45, the surface roughness index of one side of the non-woven fabric is 0.04, 0.06,
It was 0.08.
【００２２】初期性能は表面粗さ指数の小さいものの方
が良好であったが、寿命性能は同等であり、いずれの水
準も、初期性能、寿命性能共に満足のできるものであっ
た。結果を表１に示す。The initial performance was better when the surface roughness index was smaller, but the life performance was the same, and both levels were satisfactory for both the initial performance and the life performance. The results are shown in Table 1.
【００２３】比較例１、２ 融点が２６０℃のポリエチレンテレフタレ−トを芯成分
とし、融点が２３０℃のイソフタル酸共重合ポリエステ
ルを鞘成分とし、芯成分と鞘成分の重量比を８：２とし
た複合連続フィラメントを単糸繊度２ｄで溶融紡出し、
空気圧により開繊した後、移動するネット上に堆積さ
せ、１対の加熱エンボスロールを使用し、表面温度それ
ぞれ２１０、２２０℃、線圧７０Kg／cmで圧着し、目付
２７０ g／ｍ2 、厚さ０．６mmの不織布を得た。これら
不織布の見掛密度は０．４５であり、不織布の一方の面
の表面粗さ指数は、それぞれ０．１１、０．１４であっ
た。初期性能は、非常に悪く、表面粗さ指数０．１４の
ものは、測定時間中では初期洩れが止まらなかった。結
果を表１に示す。Comparative Examples 1 and 2 Polyethylene terephthalate having a melting point of 260 ° C. was used as a core component, isophthalic acid copolyester having a melting point of 230 ° C. was used as a sheath component, and the weight ratio of the core component to the sheath component was 8: 2. Melt-spun composite continuous filament with a single yarn fineness of 2d,
After the fibers are opened by air pressure, they are deposited on a moving net, and a pair of heating embossing rolls are used. The surface temperature is 210 and 220 ° C. and the linear pressure is 70 Kg / cm, and the basis weight is 270 g / m 2 and the thickness is A 0.6 mm thick non-woven fabric was obtained. The apparent densities of these non-woven fabrics were 0.45, and the surface roughness indexes of one side of the non-woven fabrics were 0.11 and 0.14, respectively. The initial performance was very poor, and those having a surface roughness index of 0.14 did not stop initial leakage during the measurement time. The results are shown in Table 1.
【００２４】比較例３ 融点が２６０℃のポリエチレンテレフタレ−トを芯成分
とし、融点が２３０℃のイソフタル酸共重合ポリエステ
ルを鞘成分とし、芯成分と鞘成分の重量比を８：２とし
た複合連続フィラメントを単糸繊度２ｄで溶融紡出し、
空気圧により開繊した後、移動するネット上に堆積さ
せ、１対の加熱エンボスロールを使用し、表面温度２０
０℃、線圧７０Kg／cmで圧着し、目付２７０ g／ｍ2 の
不織布を得た。得られた不織布を表面平滑な１対のカレ
ンダーロールで、厚さ０．５mmとなるよう圧着した。こ
の不織布の見掛密度は０．５４であり、不織布の一方の
面の表面粗さ指数は、０．０４であった。Comparative Example 3 Polyethylene terephthalate having a melting point of 260 ° C. was used as a core component, isophthalic acid copolyester having a melting point of 230 ° C. was used as a sheath component, and the weight ratio of the core component to the sheath component was 8: 2. Melt-spun composite continuous filament with single yarn fineness 2d,
After the fibers are opened by air pressure, they are deposited on a moving net, and a surface temperature of 20 is used by using a pair of heated embossing rolls.
It was pressure-bonded at 0 ° C. and a linear pressure of 70 kg / cm to obtain a nonwoven fabric having a basis weight of 270 g / m 2 . The obtained non-woven fabric was pressure-bonded with a pair of calender rolls having a smooth surface so as to have a thickness of 0.5 mm. The apparent density of this nonwoven fabric was 0.54, and the surface roughness index of one surface of the nonwoven fabric was 0.04.
【００２５】初期性能は問題ないが、圧損上昇が急激で
あり、寿命性能が短く、液体フィルターとして、十分な
ものではなかった。結果を表１に示した。Although the initial performance was not a problem, the pressure loss increased sharply, the life performance was short, and it was not sufficient as a liquid filter. The results are shown in Table 1.
【００２６】[0026]
【表１】 [Table 1]
【００２７】[0027]
【発明の効果】本発明の液体フィルター用不織布は、た
とえば、放電加工機用フィルター等において、フィルタ
ー交換直後に発生する濾過性能の低い状態（初期洩れ）
を大幅に改善でき、かつ、高寿命の液体フィルターを提
供することができる。INDUSTRIAL APPLICABILITY The non-woven fabric for liquid filters of the present invention is, for example, in a filter for an electric discharge machine or the like, in a state of low filtration performance (initial leakage) which occurs immediately after filter replacement.
It is possible to provide a liquid filter having a significantly improved life and a long life.
Claims (5)
不織布の見掛密度が０．５未満であり、かつ、少なくと
も一方の面の、ＪＩＳ−Ｂ０６０１に準じて測定される
該圧着部のくぼみの平均深さから求められる表面粗さ指
数が０．１以下であることを特徴とする液体フィルター
用不織布。1. A partially crimped non-woven fabric, wherein the non-woven fabric has an apparent density of less than 0.5, and at least one surface of the non-woven fabric is crimped according to JIS-B0601. A non-woven fabric for a liquid filter, which has a surface roughness index of 0.1 or less obtained from the average depth of the depressions.
フィラメントである請求項１記載の液体フィルター用不
織布。2. The non-woven fabric for a liquid filter according to claim 1, wherein the non-woven fabric is a polyester core-sheath type composite filament.
トが、鞘成分が芯成分に対し２０℃以上低い融点を有す
る共重合ポリエステルからなる請求項２に記載の液体フ
ィルター用不織布。3. The nonwoven fabric for a liquid filter according to claim 2, wherein the polyester-based core-sheath type composite filament is made of a copolymerized polyester having a sheath component having a melting point lower than that of the core component by 20 ° C. or more.
３０重量％を占めるものである請求項２〜３のいずれか
に記載の液体フィルター用不織布。4. The sheath component comprises 5 to 5 parts of the composite filament.
The nonwoven fabric for liquid filters according to any one of claims 2 to 3, which accounts for 30% by weight.
ィルター用不織布を、液体濾過装置のフィルター部材と
して構成したことを特徴とする液体濾過装置。5. A liquid filtering device comprising the nonwoven fabric for a liquid filter according to claim 1 as a filter member of a liquid filtering device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12499196A JP3653863B2 (en) | 1995-06-07 | 1996-05-20 | Non-woven fabric for liquid filter and liquid filtration apparatus using the same |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14068695 | 1995-06-07 | ||
| JP7-140686 | 1995-06-07 | ||
| JP12499196A JP3653863B2 (en) | 1995-06-07 | 1996-05-20 | Non-woven fabric for liquid filter and liquid filtration apparatus using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0959859A true JPH0959859A (en) | 1997-03-04 |
| JP3653863B2 JP3653863B2 (en) | 2005-06-02 |
Family
ID=26461542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12499196A Expired - Lifetime JP3653863B2 (en) | 1995-06-07 | 1996-05-20 | Non-woven fabric for liquid filter and liquid filtration apparatus using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3653863B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005007268A (en) * | 2003-06-18 | 2005-01-13 | Unitika Ltd | Nonwoven fabric for filter and method for manufacturing the same |
| JP2005176616A (en) * | 2003-12-16 | 2005-07-07 | Unitika Ltd | Binding tape |
| WO2019188923A1 (en) * | 2018-03-30 | 2019-10-03 | 東洋紡株式会社 | Wet non-woven fabric for filter, filter medium for filter, and filter |
| JP2019177350A (en) * | 2018-03-30 | 2019-10-17 | 東洋紡株式会社 | Filter medium for filter, and filter |
| JP2019177349A (en) * | 2018-03-30 | 2019-10-17 | 東洋紡株式会社 | Wet non-woven fabric |
| JPWO2020230760A1 (en) * | 2019-05-13 | 2020-11-19 |
-
1996
- 1996-05-20 JP JP12499196A patent/JP3653863B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005007268A (en) * | 2003-06-18 | 2005-01-13 | Unitika Ltd | Nonwoven fabric for filter and method for manufacturing the same |
| JP4522671B2 (en) * | 2003-06-18 | 2010-08-11 | ユニチカ株式会社 | Nonwoven fabric for filter and method for producing the same |
| JP2005176616A (en) * | 2003-12-16 | 2005-07-07 | Unitika Ltd | Binding tape |
| WO2019188923A1 (en) * | 2018-03-30 | 2019-10-03 | 東洋紡株式会社 | Wet non-woven fabric for filter, filter medium for filter, and filter |
| JP2019177350A (en) * | 2018-03-30 | 2019-10-17 | 東洋紡株式会社 | Filter medium for filter, and filter |
| JP2019177349A (en) * | 2018-03-30 | 2019-10-17 | 東洋紡株式会社 | Wet non-woven fabric |
| JPWO2020230760A1 (en) * | 2019-05-13 | 2020-11-19 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3653863B2 (en) | 2005-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1313538B1 (en) | Integrated nonwoven laminate material | |
| AU697204B2 (en) | High density nonwoven filter media | |
| KR101151139B1 (en) | Medical filter material and, utilizing the same, extracorporeal circulation column and blood filter | |
| US5580459A (en) | Filtration structures of wet laid, bicomponent fiber | |
| KR101441593B1 (en) | Nonwoven fabric for filters and process for production of the same | |
| US8895458B2 (en) | Abrasive cloth and method for producing nanofiber structure | |
| JP3653863B2 (en) | Non-woven fabric for liquid filter and liquid filtration apparatus using the same | |
| WO1997045188A1 (en) | Filter cloth and filter | |
| JPH09192426A (en) | Air filter nonwoven fabric and air filter using the same | |
| JP3326808B2 (en) | filter | |
| JP3534043B2 (en) | Pleated shaped filter material | |
| CN213407986U (en) | Sintered felt for high-temperature dust removal | |
| JP3799854B2 (en) | Air filter | |
| JPH0291262A (en) | High-tenacity nonwoven fabric | |
| JPH06126112A (en) | Filter medium for filtration of liquid | |
| JP4023042B2 (en) | Filter base material and filter device | |
| US3237776A (en) | Filter media | |
| WO2000009790A1 (en) | Dust collecting filter cloth and bag filter | |
| JPS62268900A (en) | Polyolefinic wet nonwoven fabric | |
| JP3674764B2 (en) | Non-woven fabric for polyarylensulfide and oil filter and bag filter | |
| JP2633355B2 (en) | Filter media for liquid filtration | |
| JP3161245B2 (en) | Filter substrate | |
| JPH11165009A (en) | Filter material for liquid and filter element for electric discharge machine | |
| JPH04193315A (en) | Filter having porous layer | |
| CN217340491U (en) | Meta-position aramid fiber needled felt with high filtering precision |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20040621 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040831 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20041028 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20041124 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050118 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050208 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050221 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080311 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090311 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090311 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100311 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110311 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110311 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120311 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120311 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130311 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130311 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140311 Year of fee payment: 9 |
|
| EXPY | Cancellation because of completion of term |