JP2004218595A - In-tank filter material and its manufacturing method - Google Patents
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【０００１】
【発明の属する技術分野】
本発明は燃料フィルターに関し、特に内燃機関等に設けられた燃料タンクから燃料噴射装置へ供給するのに好適に用いられるインタンク用燃料フィルター材ならびにその製造方法に関するものである。
【０００２】
【従来の技術】
内燃機関等の燃料噴射弁へ燃料を濾過して供給するためのインタンク用燃料フィルターは、燃料に混入した異物を通過させない濾過特性，流量特性，耐久性，耐燃料性，耐薬品性などの様々な特性が要求される。
【０００３】
従来、燃料フィルターは燃料が燃料タンクから燃料フィルター装置を経て燃料噴射弁に供給される工程において、燃料タンク内と燃料フィルター装置に設けられ、用いられるフィルターとして金網，焼結金属，ナイロンネット，不織布等が一般に使用されていたが、このうち、燃料タンクに設置されている燃料フィルターの構造は吸引時に袋状のフィルターの内側同士が密着しないように内面に保持フレームが挿入されていて、これによって内面同士がくっ付くことなく燃料を確実に濾過して吸引できるように考慮されている。
なお、その濾過フィルター材は最近ではナイロンネット，不織布が使用されている。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記のような従来の濾過フィルター材は比較的にコスト高で、タンク内の燃料を最大限に吸収するため、濾過フィルターの先端は燃料タンクの底面に接触させている。
また、袋状の濾材の内側同士が密着したり、折れたりしないことが必要であるために、濾過フィルターの構造を工夫して対応しているのが現状である。
【０００５】
本発明は上述の如き実状に鑑み、これに対処すべく、特にフィルター材構成に好適な繊維として熱融着繊維を見出すことにより、従来のフィルター材に比較し、より弾性があって、濾過性能に優れ、かつコスト低減可能な燃料の濾過性，耐久性に優れたフィルター材、特にインタンク用フィルター材を提供することを目的とするものである。
【０００６】
【課題を解決するための手段】
即ち、上記目的に適合する本発明フィルター材は、基本的に高融点短繊維と熱融着短繊維の混繊繊維層が２層以上、積層一体化され、一側より他側に向かって粗密構造をもつ積層繊維層に形成された不織布よりなることを特徴とする。
このフィルター材は燃料の濾過性に優れた特性を有しており、インタンク用フィルター材として頗る有効である。
【０００７】
請求項２〜５は、上記フィルター材の好ましい実施態様であり、高融点短繊維としてはポリエステル短繊維を用い、粗層側の繊度を３．０デシテックス〜２０．０デシテックス、密層側の繊度を０．５デシテックス〜５．０デシテックスとすること、また、熱融着短繊維としては鞘成分がナイロン樹脂からなり、芯成分がポリエステル樹脂からなる繊度の範囲が１．０デシテックス〜５．０デシテックスである芯鞘複合繊維を用いること、そして上記高融点短繊維と熱融着短繊維の混繊比率は１０／９０〜５０／５０であること、更に高融点短繊維と熱融着短繊維の混繊の平均繊度は粗層繊維層は５．０デシテックス以下、密層繊維層は２．２デシテックス以下であることの各態様が挙示されている。
【０００８】
請求項６は上記フィルター材の製造方法に係り、高融点短繊維と熱融着短繊維を配合してなる混繊繊維層を二層以上積層させた後、繊維層間を繊維の交絡によって物理的に結合させ、次いで加熱処理して繊維の一部を溶融させて繊維同士を付着せしめて一側より他側に向かって粗密構造をもつ不織布を形成し、次いで加熱ローラによるカレンダー処理を施すことからなる。
【０００９】
【発明の実施の形態】
以下、更に上記本発明の詳細について説明する。
本発明は、上述の如く高融点短繊維と熱融着短繊維の混繊繊維層の二層以上からなる一体化された一側より他側に向かって粗密構造をもつ積層繊維層の不織布である。
ここで、上記の高融点短繊維としては、ポリエステル短繊維が用いられ、その粗層側の繊度範囲は３．０デシテックス〜２０．０デシテックスが好適である。
３．０デシテックス以下であると粗塵を濾過する役目であるのに、細かい塵を捕集し、その結果、フィルターの濾過寿命を早める。また、２０デシテックス以上では熱融着短繊維の繊度にも関係するが、粗塵の濾過の程度に差が見られなくなる。
【００１０】
一方、ポリエステル短繊維の密層側の繊度範囲は０．５デシテックス〜５．０デシテックスが好ましく、０．５デシテックス以下であると微粒子の塵を濾過する役目は充分にあるが、初期圧が高く、その結果、フィルターの濾過寿命を早める。また、５デシテックス以上では微粒子の塵を濾過する役目を果たすのに乏しいので好ましくない。
【００１１】
次に熱融着短繊維としては、芯鞘複合繊維、特に鞘成分がナイロン樹脂からなり、芯成分がポリエステル樹脂、あるいはナイロン６６樹脂からなるものが好ましい。
通常、ポリエステル樹脂が用いられる。
鞘成分のナイロンの融点範囲はポリエステルに比し低融点で１３０℃〜２３０℃程度が好ましい。なかでも鞘成分に低融点のポリエステル樹脂を使用するのは耐燃料性に劣るので好ましくない。
【００１２】
この熱融着短繊維の繊度範囲は１．０デシテックス〜５．０デシテックスが望ましく、１．０デシテックス以下では熱融着の効率が低下する。また、繊度が５．０デシテックス以上では全体の濾過効率が低下する。
なお、上記高融点短繊維と熱融着短繊維の混繊比率としては１０／９０〜５０／５０であることが好ましく、特に高融点短繊維が１０以下であると不織布を構成する混繊繊維の腰が弱く、即ち、圧縮弾性率が低く、濾過中に不織布の厚さ方向に圧縮され易く、その結果、背圧上昇が早期に起こり易く好ましくない。
また、高融点短繊維が５０以上であると、不織布の高融点短繊維の脱落が起こり易く、フィルター性能が直ぐに低下すると共に工程の機能を阻害するので好ましくない。
【００１３】
しかして、以上の燃料の濾過性に優れたインタンク用フィルター材は、高融点短繊維と熱融着短繊維を配合してなる混繊繊維層を二層以上積層させた後、繊維層間を交絡によって物理的に結合させ、次いで加熱処理して繊維の一部を溶融させて繊維同士を付着せしめて不織布を形成し、次いで加熱ローラによるカレンダー処理を施すことにより作成される。
得られる不織布は本発明の燃料の濾過性に優れたインタンク用フィルター材である。
【００１４】
繊維層間の交絡結合を繊維同志の交絡によって行う物理的方法としてはニードルパンチ加工やウォータージェット加工が好適である。
また加熱処理は混繊繊維層を組成する高融点短繊維の溶融温度より低く、熱融着短繊維の溶融温度より高い温度で加熱すればよく、この際、全ての融着短繊維の溶融を待つ必要はなく、繊維同士が所要程度付着されれば一部の繊維の溶融でも充分である。
そして、最後は加熱ローラによるカレンダー処理によって繊維層の表面平滑化を図り、厚みを平均化せしめる。
殊に上記のフィルター材において、素材を同種に統一することにより使用後の分離処理や再生処理の取り扱いが容易となり、環境に優しくなる。
【００１５】
【実施例】
以下、本発明の実施例及び比較例により更に具体的に説明する。
なお、以下の実施例及び比較例における目付量，厚さ，圧縮弾性利率，濾過性能等の測定または評価は下記の方法に従って行った。
【００１６】
（イ）単位面積当たりの質量（目付量）
ＪＩＳ Ｌ１９０６の５．２に記載の方法に準拠して求めた。
（ロ）厚さ
ＪＩＳ Ｌ１９０６の５．１の方法に従って荷重２ＫＰａで測定した。
（ハ）圧縮弾性率
圧縮試験はピーコック社製アップライト・ダイヤル・ゲイジを用い、圧縮面積２５ｍｍφで試料を圧縮し、初荷重１２ｍｇ／ｍｍ２として荷重２００ｍｇ／ｍｍ２下での変形距離（ｍｍ）を求め、その距離を荷重１８８ｍｇ／ｍｍ２に除して、更に試料の目付で除して１００倍して得た。単位は１００ｇ目付当たりｍｇ／ｍｍ３である。
（ニ）濾過性能評価
テストベンチ（ＳＡＥＪ１８５８に準拠）による濾過性能評価を下記条件で実施し評価した。
評価条件
ダスト ＩＳＯ ＭＥＤＥＩＵＭ ＴＤ（５〜８０μｍ）
ダスト投入量 ５０ｍｇ／ｍｉｎ
オイル ＭＩＬ−Ｈ５６０６Ｆ
テスト油量 ３．０Ｌ
テスト流量 ３．０Ｌ／ｍｉｎ
ダストレンジ ５μｍ、２０μｍ、４０μｍ、６０μｍ、８０μｍ、１００μｍ、
評価
初期圧損は測定初期の圧力（ＫＰａ）
濾過効率は６０μｍまでの捕集量で評価（％）
濾過寿命の評価は９．８ＫＰａ到着時間（ｍｉｎ）
【００１７】
【実施例１】
粗層側として繊度が６．６デシテックス、繊維長５１ｍｍのポリエステル短繊維２５重量％、及び繊度が１．７デシテックス、繊維長が３８ｍｍの熱融着短繊維（鞘成分がナイロン、融点２２０℃、芯成分がポリエステル、融点２６０℃）７５重量％からなる目付１００ｇ／ｍ２の繊維層（平均繊度：２．９３デシテックス）と、密層側として繊度１．３デシテックス、繊維長４４ｍｍのポリエステル短繊維２５重量％、及び繊度が１．７デシテックス、繊維長が３８ｍｍの熱融着短繊維（鞘成分がナイロン、融点２２０℃、芯成分がポリエステル、融点２６０℃）７５重量％からなる目付１５０ｇ／ｍ２の繊維層（平均繊度：１．６デシテックス）を積層して密層の表面から粗層へニードルパンチ加工（針深度１３ｍｍ、打ち込み本数９０本／ｃｍ２）を施して繊維交絡による一体化処理をした。
引き続き、ピンテンター式熱処理機で熱処理（処理温度２４０℃、処理時間５０秒）を行って繊維間の熱融着を行った。
次いで、密層部を加熱ローラー（表面温度１９０℃）に粗層部を雰囲気温度のローラー（ローラー間のクリアランス０．３ｍｍ）に接触させてカレンダー処理を行い、のち冷却して本発明の燃料用のインタンク用フィルター材を得た。
【００１８】
【実施例２】
粗層側として繊度が６．６デシテックス、繊維長５１ｍｍのポリエステル短繊維５０重量％、及び繊度が１．７デシテックス、繊維長が３８ｍｍの熱融着短繊維（鞘成分がナイロン、融点２２０℃、芯成分がポリエステル、融点２６０℃）５０重量％からなる目付１００ｇ／ｍ２の繊維層（平均繊度：４．１５デシテックス）と、密層側として繊度１．３デシテックス、繊維長４４ｍｍのポリエステル短繊維５０重量％及び繊度が１．７デシテックス、繊維長が３８ｍｍの熱融着短繊維（鞘成分がナイロン、融点２２０℃、芯成分がポリエステル、融点２６０℃）５０重量％からなる目付１５０ｇ／ｍ２の繊維層（平均繊度：１．５デシテックス）を積層して密層の表面から粗層へニードルパンチ加工（針深度１３ｍｍ、打ち込み本数９０本／ｃｍ２）を施して繊維交絡による一体化処理をした。
引き続きピンテンター式熱処理機で熱処理（処理温度２４０℃、処理時間５０秒）を行って繊維間の熱融着を行った。
次いで密層部を加熱ローラー（表面温度１９０℃）に粗層部を雰囲気温度のローラー（ローラー間のクリアランス０．３ｍｍ）に接触させてカレンダー処理を行い、のち、冷却して本発明の燃料用のインタンク用フィルター材を得た。
【００１９】
【実施例３】
粗層側のポリエステル短繊維の繊度６．６デシテックスを繊度１０．０デシテックスで目付１５０ｇ／ｍ２（平均繊度３．７８デシテックス）に変更した以外は全て実施例１の条件とし、本発明の燃料用のインタンク用フィルター材を得た。
【００２０】
【実施例４】
密層側のポリエステル短繊維の繊度１．３デシテックスを繊度３．０デシテックスで目付２００ｇ／ｍ２（平均繊度２．０３デシテックス）に変更した以外は全て実施例１の条件とし、本発明の燃料用のインタンク用フィルター材を得た。
【００２１】
【比較例１】
粗層側のポリエステル短繊維と熱融着短繊維の配合比率を８／９２（平均繊度１．８３）に変更した以外は全て実施例１の条件とし、燃料用のインタンク用フィルター材を得た。
【比較例２】
粗層側のポリエステル短繊維と熱融着短繊維の配合比率を９０／１０（平均繊度６．１１デシテックス）に、密層側のポリエステル繊維と熱融着短繊維の配合比率を９０／１０（平均繊度１．３４デシテックス）に変更した以外は全て実施例１の条件とし、燃料用のインタンク用フィルター材を得た。
【比較例３】
メルトブロー法で作られたナイロン長繊維の繊維層からなる粗層が繊度３．０デシテックス、目付が７０ｇ／ｍ２、中層が繊度２．２デシテックス、目付が７０ｇ／ｍ２、密層が繊度０．９デシテックス、目付が７０ｇ／ｍ２である各繊維層を粗層，中層，密層と積層し、粗層側に４０メッシュのナイロンの網を重ねて密層側から超音波融着をピン間隔８ｍｍでピン列間隔８ｍｍのドット柄模様で層接着したインタンク用フィルター材を得た。
【比較例４】
熱融着短繊維をナイロン−エステル鞘芯の代わりに低融点エステル／高融点エステル（低融点ポリエステル融点１２０℃）の鞘芯に替えた以外は全て実施例１の条件に従って実施し、燃料用のインタンク用フィルター材を得た。
【００２２】
かくして得られた上記実施例１，２，３，４及び比較例１，２，３，４について、夫々特性評価を行った。その結果を表１に示す。
【００２３】
【表１】
上記表１より実施例１，２，３，４の本発明フィルター材は共に濾過性能が良く、燃料に対する耐久性に優れていることが分かる。
比較例１は熱融着短繊維が多いため圧縮弾性率が低くなり、燃料の濾過性の初期圧損が高くなる。比較例２は逆に熱融着短繊維が少ないため、繊維の脱落が生じる問題がある。
また、比較例３は全てナイロンであるために圧縮弾性率がエステルに比較して劣るため、へたり易く、その結果、背圧上昇が早い。また、比較例４の如く、層間の接着を低融点のポリエステル不織布を使用することは、燃料の耐久性に劣ることを示しており、低融点のポリエステル不織布の使用は好ましくない。
【００２５】
【発明の効果】
以上説明したように、本発明の高融点短繊維と熱融着短繊維の混繊繊維層が二層以上からなる一体化された粗密構造をもつ積層繊維層の不織布からなるインタンク用フィルター材は、濾過フィルター材として従来のものより弾力性があって、濾過性能に優れ、かつコストの低減を図った燃料の濾過性能，耐久性に優れており、インタンク用フィルターとして極めて有効な濾過フィルター材を提供することができる。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fuel filter, and more particularly to a fuel filter material for an in-tank suitably used to supply a fuel to a fuel injection device from a fuel tank provided in an internal combustion engine or the like, and a method of manufacturing the same.
[0002]
[Prior art]
The in-tank fuel filter for filtering and supplying fuel to the fuel injection valve of an internal combustion engine, etc., has filtration characteristics, flow characteristics, durability, fuel resistance, chemical resistance, etc. that do not allow foreign substances mixed in the fuel to pass through. Various characteristics are required.
[0003]
Conventionally, a fuel filter is provided in a fuel tank and a fuel filter device in a process in which fuel is supplied from a fuel tank to a fuel injection valve via a fuel filter device, and a wire mesh, a sintered metal, a nylon net, and a nonwoven fabric are used as filters. Among them, the structure of the fuel filter installed in the fuel tank has a holding frame inserted on the inner surface so that the inside of the bag-shaped filter does not adhere to each other during suction, and It has been considered that the fuel can be surely filtered and sucked without the inner surfaces sticking to each other.
Recently, nylon nets and non-woven fabrics have been used as the filter material.
[0004]
[Problems to be solved by the invention]
However, the conventional filter material as described above is relatively expensive, and the tip of the filter is in contact with the bottom surface of the fuel tank in order to absorb the fuel in the tank to the maximum.
Further, since it is necessary that the insides of the bag-shaped filter media do not adhere to each other and do not break, the current situation is that the structure of the filter is improved by devising it.
[0005]
In view of the above situation, the present invention finds a heat-sealing fiber as a fiber suitable for a filter material structure in order to cope with the situation, and has a more elasticity compared with a conventional filter material, and has a higher filtering performance. It is an object of the present invention to provide a filter material having excellent filterability and durability which is excellent in fuel cost and can be reduced in cost, particularly a filter material for an in-tank use.
[0006]
[Means for Solving the Problems]
That is, the filter material of the present invention that meets the above-mentioned object is basically composed of two or more mixed fiber layers of high-melting short fibers and heat-fused short fibers, which are laminated and integrated. It is made of a nonwoven fabric formed on a laminated fiber layer having a structure.
This filter material has excellent fuel filterability and is very effective as an in-tank filter material.
[0007]
Claims 2 to 5 are preferred embodiments of the filter material, wherein polyester short fibers are used as the high melting point short fibers, and the fineness of the coarse layer is 3.0 to 20.0 decitex, and the fineness of the dense layer is Of 0.5 to 5.0 decitex, and the heat-fusible short fibers have a sheath component of nylon resin and a core component of polyester resin with a fineness range of 1.0 to 5.0 decitex. The core-sheath conjugate fiber which is decitex is used, and the mixing ratio of the high melting point short fiber and the heat fusion short fiber is 10/90 to 50/50, and the high melting point short fiber and the heat fusion short fiber are further used. The average fineness of the mixed fiber is 5.0 dtex or less for the coarse fiber layer and 2.2 dtex or less for the dense fiber layer.
[0008]
Claim 6 relates to the method for producing a filter material, wherein two or more mixed fiber layers each including a high melting point short fiber and a heat-sealing short fiber are laminated, and then the fiber layers are physically entangled by fiber entanglement. Then, heat treatment is performed to melt a part of the fibers and attach the fibers together to form a nonwoven fabric having a dense structure from one side to the other side, and then calendering by a heating roller Become.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the details of the present invention will be further described.
The present invention is a nonwoven fabric of a laminated fiber layer having a coarse-dense structure from one side integrated toward the other side composed of two or more layers of a mixed fiber layer of a high melting point short fiber and a heat fusion short fiber as described above. is there.
Here, polyester short fibers are used as the high melting point short fibers, and the fineness range on the coarse layer side is preferably from 3.0 dtex to 20.0 dtex.
When it is less than 3.0 decitex, it serves to filter coarse dust, but collects fine dust, thereby shortening the filtration life of the filter. In addition, if it is more than 20 decitex, it depends on the fineness of the heat-fused short fibers, but no difference is seen in the degree of filtration of coarse dust.
[0010]
On the other hand, the fineness range of the polyester staple fiber on the dense layer side is preferably 0.5 decitex to 5.0 decitex, and when it is 0.5 decitex or less, the role of filtering fine particle dust is sufficient, but the initial pressure is high. As a result, the filtration life of the filter is shortened. On the other hand, if it is 5 dtex or more, it is not preferable because it does not play a role of filtering fine particle dust.
[0011]
Next, as the heat-fusible short fiber, a core-sheath conjugate fiber, particularly a sheath component made of a nylon resin and a core component made of a polyester resin or a nylon 66 resin is preferable.
Usually, a polyester resin is used.
The melting point of nylon of the sheath component is preferably lower than that of polyester, and is preferably about 130 ° C to 230 ° C. Among them, the use of a polyester resin having a low melting point as the sheath component is not preferable because of poor fuel resistance.
[0012]
The fineness range of the heat-fused short fibers is preferably from 1.0 dtex to 5.0 dtex, and if it is less than 1.0 dtex, the efficiency of the heat fusion decreases. When the fineness is 5.0 decitex or more, the overall filtration efficiency is reduced.
The mixed fiber ratio of the high-melting short fibers and the heat-fused short fibers is preferably 10/90 to 50/50, and particularly when the high-melting short fibers are 10 or less, the mixed fibers constituting the nonwoven fabric Has a low stiffness, that is, has a low compression modulus, and is easily compressed in the thickness direction of the nonwoven fabric during filtration. As a result, the back pressure tends to increase early, which is not preferable.
On the other hand, if the number of the high-melting short fibers is 50 or more, the high-melting short fibers of the nonwoven fabric are liable to drop off, which immediately deteriorates the filter performance and impairs the function of the process, which is not preferable.
[0013]
However, the filter material for in-tank, which has excellent filterability of the above-mentioned fuel, is obtained by laminating two or more mixed fiber layers composed of high melting point short fibers and heat fusion short fibers, They are physically bonded by entanglement, and then heat-treated to melt a part of the fibers, adhere the fibers to each other to form a nonwoven fabric, and then perform calendering by a heating roller.
The obtained nonwoven fabric is the filter material for an in-tank of the present invention which is excellent in fuel filterability.
[0014]
Needle punching or water jet processing is suitable as a physical method for performing the entanglement between the fiber layers by entanglement of the fibers.
In addition, the heat treatment may be performed by heating at a temperature lower than the melting temperature of the high-melting short fibers constituting the mixed fiber layer and higher than the melting temperature of the heat-fused short fibers. There is no need to wait, and it is sufficient to melt some of the fibers as long as the fibers adhere to the required degree.
Finally, the surface of the fiber layer is smoothed by calendering using a heating roller, and the thickness is averaged.
In particular, in the above-mentioned filter materials, by unifying the materials to the same type, handling of the separation treatment and the regeneration treatment after use becomes easy, and the environment becomes environmentally friendly.
[0015]
【Example】
Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.
In the following Examples and Comparative Examples, the measurement or evaluation of the basis weight, thickness, compression modulus, filtration performance, etc. was performed according to the following methods.
[0016]
(B) Mass per unit area (basis weight)
It was determined according to the method described in 5.2 of JIS L1906.
(B) Thickness The thickness was measured at a load of 2 KPa according to the method of 5.1 of JIS L1906.
(C) compression test compressive modulus using a Peacock Co. Upright Dial Gage, the samples were compressed by the compression area 25 mm, distance variations in the load 200 mg / mm 2 under the initial load of 12 mg / mm 2 (mm) Was obtained, the distance was divided by the load of 188 mg / mm 2 , and further divided by the basis weight of the sample to obtain 100 times. The unit is mg / mm 3 per 100 g basis weight.
(D) Filtration performance evaluation A filtration bench was evaluated by a test bench (based on SAEJ1858) under the following conditions.
Evaluation conditions Dust ISO MEDIUM TD (5-80 μm)
Dust input amount 50mg / min
Oil MIL-H5606F
Test oil volume 3.0L
Test flow rate 3.0L / min
Dust range 5μm, 20μm, 40μm, 60μm, 80μm, 100μm,
Evaluation initial pressure loss is pressure (KPa) at the beginning of measurement
Filtration efficiency is evaluated based on the amount collected up to 60 μm (%)
Evaluation of filtration life is 9.8 KPa arrival time (min)
[0017]
Embodiment 1
As the coarse layer side, a heat-fused short fiber having a fineness of 6.6 dtex, a fiber length of 51 mm and a polyester short fiber of 25% by weight and a fiber size of 1.7 decitex and a fiber length of 38 mm (sheath component is nylon, melting point: 220 ° C., the core component is polyester, the melting point 260 ° C.) fiber layer having a basis weight of 100 g / m 2 consisting of 75 wt% (average fineness: 2.93 dtex) and a fineness of 1.3 dtex, polyester staple fibers having a fiber length of 44mm as dense layer side A heat-fused short fiber of 25% by weight, a fineness of 1.7 decitex and a fiber length of 38mm (sheath component: nylon, melting point: 220 ° C, core component: polyester, melting point: 260 ° C). second fiber layer (average fineness: 1.6 dtex) was laminated needle punched from the surface of the dense layer to the rough layer (needle depth 13 mm, end counts 9 This / cm 2) subjected to the integration processing by the fiber entanglement.
Subsequently, heat treatment (processing temperature: 240 ° C., processing time: 50 seconds) was performed by a pin tenter type heat treatment machine to perform heat fusion between the fibers.
Next, the dense layer portion is brought into contact with a heating roller (surface temperature of 190 ° C.) and the coarse layer portion is brought into contact with a roller at an ambient temperature (a clearance between the rollers of 0.3 mm) to carry out calendering treatment. Was obtained.
[0018]
Embodiment 2
As the coarse layer side, a heat-fused short fiber having a fineness of 6.6 decitex, a fiber length of 51 mm and a polyester short fiber of 50% by weight and a fineness of 1.7 decitex and a fiber length of 38 mm (sheath component is nylon, melting point: 220 ° C., A fiber layer (average fineness: 4.15 dtex) having a basis weight of 100 g / m 2 and a polyester short fiber having a fineness of 1.3 dtex and a fiber length of 44 mm as the dense layer side, comprising 50% by weight of a core component of polyester and a melting point of 260 ° C. 50 wt% and a fineness of 1.7 dtex, heat Chakutan fibers of the fiber length of 38mm (sheath component is nylon, melting point 220 ° C., the core component is polyester, the melting point 260 ° C.) basis weight 150 g / m 2 consisting of 50 wt% Needle layer (average fineness: 1.5 dtex) and needle punching from the surface of the dense layer to the coarse layer (needle depth: 13 mm, number of shots: 90) / Cm 2) was the integration process by the fiber entangled subjected to.
Subsequently, heat treatment (processing temperature: 240 ° C., processing time: 50 seconds) was performed by a pin tenter type heat treatment machine to perform heat fusion between the fibers.
Next, the dense layer portion is brought into contact with a heating roller (surface temperature of 190 ° C.) and the coarse layer portion is brought into contact with a roller at an ambient temperature (a clearance between rollers of 0.3 mm) to carry out a calendering treatment. Was obtained.
[0019]
Embodiment 3
The fuel of the present invention was prepared under the same conditions as in Example 1 except that the fineness of 6.6 dtex of the polyester short fiber on the coarse layer side was changed to a weight of 150 g / m 2 (average fineness of 3.78 dtex) at a fineness of 10.0 dtex. In-tank filter material was obtained.
[0020]
Embodiment 4
The fuel of the present invention was prepared under the same conditions as in Example 1 except that the fineness of the polyester short fiber on the dense layer side was changed from 1.3 dtex to a density of 3.0 dtex to a basis weight of 200 g / m 2 (average fineness of 2.03 dtex). In-tank filter material was obtained.
[0021]
[Comparative Example 1]
A fuel in-tank filter material was obtained under the same conditions as in Example 1 except that the mixing ratio of the polyester short fibers and the heat-fused short fibers on the coarse layer side was changed to 8/92 (average fineness: 1.83). Was.
[Comparative Example 2]
The compounding ratio of the polyester short fibers and the heat-fusible short fibers on the coarse layer side is 90/10 (average fineness 6.11 dtex), and the compounding ratio between the polyester fibers on the dense layer side and the heat-fusible short fibers is 90/10 ( Except that the average fineness was changed to 1.34 dtex, all conditions were the same as in Example 1 to obtain an in-tank filter material for fuel.
[Comparative Example 3]
The coarse layer consisting of the nylon long fiber fiber layer produced by the melt blow method has a fineness of 3.0 dtex, the basis weight is 70 g / m 2 , the middle layer has a fineness of 2.2 dtex, the basis weight is 70 g / m 2 , and the dense layer has a fineness of 0. Each fiber layer having a density of 0.9 dtex and a basis weight of 70 g / m 2 was laminated with a coarse layer, a middle layer, and a dense layer, and a 40-mesh nylon net was laminated on the coarse layer side, and ultrasonic fusion was performed from the dense layer side. An in-tank filter material layer-adhered with a dot pattern having an interval of 8 mm and a pin array interval of 8 mm was obtained.
[Comparative Example 4]
Except that the heat-fused staple fiber was replaced with a low-melting ester / high-melting ester (low-melting polyester melting point: 120 ° C.) sheath core instead of the nylon-ester sheath core, all were carried out in accordance with the conditions of Example 1 and used for fuel. An in-tank filter material was obtained.
[0022]
The characteristics of the above Examples 1, 2, 3, 4 and Comparative Examples 1, 2, 3, 4 thus obtained were evaluated. Table 1 shows the results.
[0023]
[Table 1]
From Table 1 above, it can be seen that the filter materials of the present invention of Examples 1, 2, 3, and 4 all have good filtration performance and are excellent in fuel durability.
In Comparative Example 1, the compression modulus is low due to the large number of heat-fused short fibers, and the initial pressure loss of the filterability of the fuel is high. On the contrary, Comparative Example 2 has a problem that the fibers are dropped because the heat-fused short fibers are small.
Further, since Comparative Example 3 is all made of nylon, the compression elastic modulus is inferior to that of ester, so that it is easy to settle, and as a result, the back pressure rises quickly. Further, as shown in Comparative Example 4, the use of a low-melting polyester nonwoven fabric for bonding between layers indicates that the durability of the fuel is inferior, and the use of a low-melting polyester nonwoven fabric is not preferred.
[0025]
【The invention's effect】
INDUSTRIAL APPLICABILITY As described above, an in-tank filter material comprising a nonwoven fabric of a laminated fiber layer having an integrated coarse-dense structure in which a mixed fiber layer of a high-melting short fiber and a heat-fusible short fiber of the present invention is composed of two or more layers Is a more effective filter for in-tank applications because it is more resilient than conventional materials, has better filtration performance, and has excellent fuel filtration performance and reduced cost. Material can be provided.
Claims (6)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003009188A JP4152756B2 (en) | 2003-01-17 | 2003-01-17 | In-tank filter material and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2003009188A JP4152756B2 (en) | 2003-01-17 | 2003-01-17 | In-tank filter material and manufacturing method thereof |
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| JP2004218595A true JP2004218595A (en) | 2004-08-05 |
| JP4152756B2 JP4152756B2 (en) | 2008-09-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006187710A (en) * | 2005-01-05 | 2006-07-20 | Asahi Kasei Fibers Corp | Filter medium for fuel and filter for fuel |
| JP2013193028A (en) * | 2012-03-19 | 2013-09-30 | Kureha Ltd | Filter medium and fuel filter |
| JP2018126721A (en) * | 2017-02-10 | 2018-08-16 | Jnc株式会社 | filter |
| CN110529310A (en) * | 2019-09-24 | 2019-12-03 | 西华大学 | A kind of high-melting fat fatty acid methyl esters or ethyl ester oil supply system |
-
2003
- 2003-01-17 JP JP2003009188A patent/JP4152756B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006187710A (en) * | 2005-01-05 | 2006-07-20 | Asahi Kasei Fibers Corp | Filter medium for fuel and filter for fuel |
| JP4700968B2 (en) * | 2005-01-05 | 2011-06-15 | 旭化成せんい株式会社 | Fuel filter material and fuel filter |
| JP2013193028A (en) * | 2012-03-19 | 2013-09-30 | Kureha Ltd | Filter medium and fuel filter |
| JP2018126721A (en) * | 2017-02-10 | 2018-08-16 | Jnc株式会社 | filter |
| CN110529310A (en) * | 2019-09-24 | 2019-12-03 | 西华大学 | A kind of high-melting fat fatty acid methyl esters or ethyl ester oil supply system |
| CN110529310B (en) * | 2019-09-24 | 2024-04-02 | 西华大学 | High-melting-point fatty acid methyl ester or ethyl ester oil supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4152756B2 (en) | 2008-09-17 |
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