JP2001054709A - Filter material - Google Patents
Filter materialInfo
- Publication number
- JP2001054709A JP2001054709A JP2000207947A JP2000207947A JP2001054709A JP 2001054709 A JP2001054709 A JP 2001054709A JP 2000207947 A JP2000207947 A JP 2000207947A JP 2000207947 A JP2000207947 A JP 2000207947A JP 2001054709 A JP2001054709 A JP 2001054709A
- Authority
- JP
- Japan
- Prior art keywords
- component
- filament
- core
- melting point
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Nonwoven Fabrics (AREA)
- Treatment Of Fiber Materials (AREA)
- Filtering Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、エンボスロールに
より部分的に熱圧着された高目付不織布からなるフィル
ター材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter material made of a nonwoven fabric having a high weight permeated partially by thermocompression bonding using an embossing roll.
【０００２】[0002]
【従来の技術】口金から紡出した連続フィラメントをエ
アーサッカー等により、高速牽引した後、鉛を主体とし
た衝突板に衝突帯電させフィラメントを開繊した後、移
動するネットコンベアー上に捕集、加熱したエンボスロ
ールにより部分的に熱圧着し、不織布とする方法、ある
いはネット上に捕集した積層ウェブをニードルパンチに
より機械的に絡合させ不織布とする方法が一般的であ
り、工業資材、土木資材など用途は広く、特にフィルタ
ー用途においては、高性能であり、耐久性、加工性に優
れていることからロ紙フィルター代替品として需要はま
すます旺盛である。2. Description of the Related Art A continuous filament spun from a spinneret is pulled at high speed by air soccer or the like, and then is charged against a collision plate mainly composed of lead to open the filament, and then collected on a moving net conveyor. Non-woven fabrics are generally obtained by partially thermocompression bonding with a heated embossing roll to form a non-woven fabric, or by mechanically entangled a laminated web collected on a net with a needle punch to form a non-woven fabric. It is widely used for materials and the like, and especially in filter applications, because of its high performance, durability and workability, the demand as a paper filter replacement is growing more and more.
【０００３】フィルター基材は、部分的な欠陥がフィル
ターの性能を大きく左右するため、目付斑が少なく、シ
ートの部分的剥離欠点のない高品質である不織布の要求
が強い。As for the filter base material, since a partial defect largely affects the performance of the filter, there is a strong demand for a high-quality nonwoven fabric having little spotting and no partial peeling defect of the sheet.
【０００４】このため、例えば、シート目付が１２０ｇ
／ｍ2 以上などである高目付の不織布のフィルター基材
としての使用可能性等が検討され始めている。For this reason, for example, a sheet weight is 120 g.
/ M 2 or more and the like, and the possibility of using a nonwoven fabric having a high basis weight as a filter substrate has begun to be studied.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、シート
目付が、例えば、１２０ｇ／ｍ2 以上などである高目付
の不織布は、一般に、エンボスロールで熱圧着しても厚
み方向での熱圧着性が不十分なことにより厚み中央部で
の層間剥離がしやすく、またエンボスロール表面の汚れ
に起因し、エンボスしたシートがロールにとられやすく
不織布の表層部が部分的に剥離する。従って、このよう
な不織布をフィルター用としてプリーツ加工した場合、
プリーツ加工性が良くないばかりか、部分的に剥離した
箇所から微細粒子の洩れが発生するなどフィルター基材
として完全なものとは言えない。However, nonwoven fabrics having a high basis weight, such as a sheet basis weight of, for example, 120 g / m 2 or more, generally have poor thermocompression bonding in the thickness direction even when thermocompression-bonded with an embossing roll. When the thickness is sufficient, delamination at the center of the thickness is easy, and the embossed sheet is easily taken up by the roll due to dirt on the surface of the embossing roll, and the surface layer of the nonwoven fabric is partially peeled off. Therefore, when such a nonwoven fabric is pleated for a filter,
Not only is the pleating property not good, but also fine particles are leaked from partially peeled portions.
【０００６】本発明は、上述したような従来欠点を改善
した、すなわち、プリーツ加工性に優れ、シート剥離が
なく、かつ高捕集性能を有するフィルター材を提供せん
とするものである。An object of the present invention is to provide a filter material which has improved the above-mentioned conventional drawbacks, that is, has excellent pleating workability, has no sheet peeling, and has high collecting performance.
【０００７】[0007]
【課題を解決するための手段】本発明は、かかる目的達
成のために、次のような手段を採用するものである。The present invention employs the following means to achieve the above object.
【０００８】すなわち本発明のフィルター材は、芯が高
融点成分、鞘が低融点成分である芯鞘型フィラメントか
らなる部分的に熱圧着された不織布よりなり、該不織布
の目付が２００〜３６０ｇ／ｍ2 であるとともに、プリ
ーツ賦型加工がされてなることを特徴とするものであ
る。That is, the filter material of the present invention comprises a partially thermocompression-bonded nonwoven fabric comprising a core-sheath type filament having a core having a high melting point component and a sheath having a low melting point component, and having a basis weight of 200 to 360 g / h. m 2 and pleated shaping.
【０００９】[0009]
【発明の実施の形態】本発明の基本的思想は、不織布か
らなるフィルター材として、芯が高融点成分、鞘が低融
点成分である芯鞘型フィラメントを用いて、特に、部分
的に熱圧着され、かつ目付が２００〜３６０ｇ／ｍ2 と
非常に大きな不織布を用いることによって、良好なフィ
ルター捕集性能とプリーツ加工後の形態保持性を実現し
たものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The basic idea of the present invention is to use a core-sheath type filament having a high-melting-point component and a low-melting-point sheath as a filter material made of a non-woven fabric, and in particular, to partially thermocompression-bond it. By using a nonwoven fabric having an extremely large basis weight of 200 to 360 g / m 2 , good filter collection performance and shape retention after pleating are realized.
【００１０】本発明のフィルター材の構成材料としての
不織布としては、芯が高融点成分、鞘が低融点成分であ
る芯鞘型フィラメントからなっていて、目付が２００〜
３６０ｇ／ｍ2 の範囲にあり、部分的に熱圧着されたも
のである。The nonwoven fabric as a constituent material of the filter material of the present invention has a core made of a core-sheath type filament having a high melting point component and a sheath having a low melting point component, and has a basis weight of 200 to 200%.
It is in the range of 360 g / m 2 and is partially thermocompression-bonded.
【００１１】目付が２００ｇ／ｍ2 未満であると、用途
により、捕集能力的に希望レベルに到達せず頻繁にフィ
ルター材を交換する必要があるなどの不都合がある場合
があって望ましくなく、一方、３６０ｇ／ｍ2 より大き
いとプリーツ加工が難しくなり、フィルター性能は良好
でも、結局、装置を構成するための一部材として実際的
なものではない場合がある。If the basis weight is less than 200 g / m 2, it may not be desirable because there may be inconveniences such as the necessity of frequently changing the filter material without reaching the desired level in terms of the collecting ability depending on the application. On the other hand, when it is larger than 360 g / m 2 , pleating becomes difficult, and although the filter performance is good, it may not be practical as one member for constituting the device after all.
【００１２】本発明に用いられる不織布は、目付（Ｘ：
ｇ／ｍ2 ）と剛軟度（Ｙ：ｍｇｆ）の下式で示される関
係が０．０３以上であることが好ましい。より好ましく
は０．０３６以上のものであることである。The nonwoven fabric used in the present invention has a basis weight (X:
g / m 2 ) and the softness (Y: mgf) are preferably 0.03 or more. More preferably, it is 0.036 or more.
【００１３】Ｙ／Ｘ2 ≧０．０３、ただし、Ｘ≧２００ かかる値が、０．０３未満である場合、不織布の剛性不
足によりプリーツ部がシャープでなく均一性に欠けたも
のしか得られず、加工性が不良であるばかりか、フィル
ターユニットに組込むことすら困難なものとなってしま
う。Y / X 2 ≧ 0.03, where X ≧ 200 When such a value is less than 0.03, only a pleat having a sharpness and lack of uniformity due to insufficient rigidity of the nonwoven fabric can be obtained. In addition, not only the workability is poor, but also it becomes difficult to incorporate it into the filter unit.
【００１４】また、不織布の圧着面積は、好ましくは３
５％以下、さらに好ましくは３０％以下にするのが、フ
ィルターの圧損やフィルター寿命を向上させる上で好ま
しい。なお、３５％を越えると不織布の厚みは低下する
が圧着効率が低下するため圧着深さが浅くなり、層間剥
離し易いものとなる傾向があり、それが起因してプリー
ツ加工の際プリーツ部が剥離し、同部分からのダスト洩
れが発生するという問題が惹起しやすく、さらにフィル
ターユニットに組込む際の作業性あるいはユニットに樹
脂止めする際の不織布剥離部分のシール性不良によるフ
ィルター欠点につながるなどの問題が発生しやすくな
る。The pressure-bonding area of the nonwoven fabric is preferably 3
It is preferably 5% or less, more preferably 30% or less, in order to improve the pressure loss of the filter and the filter life. If it exceeds 35%, the thickness of the nonwoven fabric decreases, but the compression efficiency decreases, so the compression depth tends to be shallow, and the delamination tends to occur easily. It is easy to cause problems such as peeling and dust leakage from the same part, and it also leads to filter defects due to poor workability when assembling into the filter unit or poor sealing property of the nonwoven fabric peeling part when fixing to the unit with resin. Problems are more likely to occur.
【００１５】また、かかる圧着部分の非圧着部分に対す
る厚み保持率は６５％以下であるのが好ましい。圧着部
分の厚み保持率がその範囲を外れる場合、圧着力が不十
分であるために不織布表層部の見掛け上の欠点がなくて
も、プリーツ加工など折り曲げ加工した際、接着点がは
がれる、いわゆる層間剥離が発生し、フィルター性能、
プリーツ加工性能などフィルター基材として満足できる
ものが得られにくくなる。It is preferable that the ratio of the thickness of the press-bonded portion to the non-press-bonded portion is 65% or less. When the thickness retention rate of the crimped portion is out of the range, the bonding point is peeled off when folded, such as pleating, even if there is no apparent defect in the surface layer of the nonwoven fabric due to insufficient crimping force. Peeling occurs, filter performance,
Satisfactory filter base materials such as pleating performance are difficult to obtain.
【００１６】不織布を構成するフィラメントは、本発明
の如くに、２００ｇ／ｍ2 以上の高目付の不織布の場
合、高融点成分と低融点成分の２成分よりなる芯鞘型の
ものを用いることが重要である。例えば、高融点成分だ
けなどの単一成分のフィラメントである場合、単にエン
ボスロールの温度アップおよび圧力アップだけでは、接
着が不十分になる場合が多く、層間剥離が発生し、フィ
ルター性能、プリーツ加工性能などフィルター基材とし
て満足できるものを得ることは難しい。あるいは、接着
性の良好な低融点だけなどの単一成分のフィラメントで
ある場合、熱接着性は改善されるものの、フィラメント
の強力が小さいことからフィルターの強力が小さかった
り、また、フィルターとしての熱安定性の点でも満足の
いくフィルター基材を得ることは概して難しい。As the filament constituting the non-woven fabric, as in the present invention, in the case of a non-woven fabric having a high basis weight of 200 g / m 2 or more, a core-sheath type filament composed of a high melting point component and a low melting point component may be used. is important. For example, in the case of a single component filament such as a high melting point component alone, simply increasing the temperature and pressure of the embossing roll often results in insufficient adhesion, delamination occurs, filter performance, and pleating. It is difficult to obtain a satisfactory filter base material such as performance. Alternatively, in the case of a single component filament having only a low melting point with good adhesiveness, although the thermal adhesiveness is improved, the strength of the filter is low due to the low strength of the filament, and the heat as a filter is low. It is generally difficult to obtain a satisfactory filter substrate in terms of stability.
【００１７】また、フィラメントの接着力をカバーする
ためアクリル樹脂などの樹脂を含浸させる等のことも考
えられるが、そのような場合、不織布を構成するフィラ
メントの空隙率が減少し、ダスト捕集効率が低下するな
どの問題が新たに発生するので避けるべきである。It is also conceivable to impregnate a resin such as an acrylic resin in order to cover the adhesive force of the filament. In such a case, the porosity of the filament constituting the nonwoven fabric is reduced, and the dust collection efficiency is reduced. Problems, such as a decrease in the temperature, should be avoided.
【００１８】また、フィラメントに使用する高融点およ
び低融点ポリマーは、ポリエステル、ナイロン、ポリプ
ロピレンあるいはそれらの共重合ポリマーなど、あるい
はまた、これらのポリマー中へ第３成分を添加したもの
などいずれの樹脂を採用してもよい。また、本発明にお
ける低融点成分と高融点成分のフィラメント形態は、高
融点成分のまわりを低融点成分が被覆している芯鞘フィ
ラメントである。The high-melting and low-melting polymers used for the filament include polyester, nylon, polypropylene, copolymers thereof, and the like, or resins obtained by adding a third component to these polymers. May be adopted. Further, the filament form of the low melting point component and the high melting point component in the present invention is a core-sheath filament in which the low melting point component covers the high melting point component.
【００１９】本発明においては、低融点成分の比率が全
繊維成分に対して５〜３０重量％の範囲にあることが好
ましく、低融点成分の比率が５重量％未満である場合、
低融点成分が高融点成分のまわりを被覆できない部分が
発生しやすく、その場合には、該非被覆部分で紡糸糸切
れが発生しやすく、製品欠点も出やすいなどの問題が生
じる。また、逆に低融点成分が３０重量％を越える場合
は、エンボスロール温度を低融点ポリマーの融点近い温
度まで上昇させることが効果的であり、エンボスロール
の汚れが発生しやすく、そのため不織布がロールから剥
離しにくく、不織布の表層部で部分剥離を惹起しやすく
なるなど、フィルター基材として満足なものを提供する
ことが難しくなる。In the present invention, the ratio of the low melting point component is preferably in the range of 5 to 30% by weight with respect to the total fiber components, and when the ratio of the low melting point component is less than 5% by weight,
A portion where the low melting point component cannot coat around the high melting point component is apt to be generated. In such a case, there is a problem that the spun yarn is apt to be broken in the uncoated portion and a product defect is apt to occur. On the other hand, when the low melting point component exceeds 30% by weight, it is effective to raise the temperature of the embossing roll to a temperature close to the melting point of the low melting point polymer. From the surface layer of the nonwoven fabric, and it is difficult to provide a satisfactory filter base material.
【００２０】また、不織布を構成するフィラメントの繊
度は、１〜１０デニールの範囲にあるのが好ましく、繊
度が１デニール未満である場合、紡糸性の不調により製
品採取が困難となる場合があり、生産性も低く採算に合
わないものとなる等、問題も多い。また、デニールが１
０デニールよりも大きいと、繊維構成本数不足によるフ
ィルター効率が低下する問題があり、フィルター用途に
は不適なものとなりがちである。The fineness of the filaments constituting the nonwoven fabric is preferably in the range of 1 to 10 deniers. If the fineness is less than 1 denier, it may be difficult to collect the product due to poor spinnability. There are many problems such as low productivity and unprofitability. Denier is 1
If it is larger than 0 denier, there is a problem that the filter efficiency is reduced due to the shortage of the number of fibers constituting the fiber, which tends to be unsuitable for filter applications.
【００２１】本発明のフィルター材は、２００〜３６０
ｇ／ｍ2 という高目付不織布で構成され、高捕集性能の
フィルター特性と、良好なプリーツ加工性やその形態保
持性を両立させ得たものである。[0021] The filter material of the present invention has a content of 200 to 360.
It is composed of a nonwoven fabric having a high basis weight of g / m 2 , and has both filter characteristics of high collection performance, good pleating workability and shape retention.
【００２２】本発明のフィルター材を製造するためのエ
ンボスロールの彫刻パターンは、特に限定されるもので
はないが、好ましくは、彫刻深さを約０．５〜１ｍｍ程
度にするのが、高目付の不織布の非圧着部に対する圧着
部の厚み保持率を６５％以下にキープし、また、不織布
の目付（Ｘ）と剛軟度（Ｙ）との関係をＹ／Ｘ2 ≧０．
０３という最適なものになし得るので好ましいものであ
る。The engraving pattern of the embossing roll for producing the filter material of the present invention is not particularly limited, but preferably the engraving depth is about 0.5 to 1 mm. The thickness retention of the crimped portion to the non-crimped portion of the nonwoven fabric is kept at 65% or less, and the relationship between the basis weight (X) and the softness (Y) of the nonwoven fabric is Y / X 2 ≧ 0.
03 is preferable because it can be optimized.
【００２３】[0023]
【実施例】以下、本発明を実施例によって更に詳細に説
明するが、実施例の中に示す特性値の測定方法は次の通
りである。 ［剛軟度］試料の不織布１ｍ幅当り２個（タテ方向）
を、１インチ×１．５インチの大きさに裁断して２個採
取して試料とし、この試料を用いて、ＪＩＳ Ｌ−１０
８６−６．１３に基づいて評価した。 ［目付（ｇ／ｍ2 ）］タテ１ｍ×ヨコ１ｍの大きさの不
織布の重量を測定した。 ［圧着部の厚み保持率（％）］ 非圧着部の厚さＡ：ＪＩＳ Ｌ−１０８５ダイヤルゲー
ジ法に準じてディスク径が１０ｍｍであるＴＥＣＲＯＣ
厚み計で測定した。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. The method of measuring characteristic values shown in the examples is as follows. [Bending softness] 2 pieces per 1m width of sample nonwoven fabric (vertical direction)
Was cut into a size of 1 inch × 1.5 inch, and two pieces were sampled to obtain a sample. Using this sample, JIS L-10
Evaluation was based on 86-6.13. [Density (g / m 2 )] The weight of a nonwoven fabric having a size of 1 m in length and 1 m in width was measured. [Thickness retention rate of crimping part (%)] Thickness of non-crimping part A: TECROC with a disk diameter of 10 mm according to JIS L-1085 dial gauge method
It was measured with a thickness gauge.
【００２４】圧着部の厚さＢ：走査型電子顕微鏡を用い
拡大倍率１００倍で圧着部の断面写真を撮影、ノギスに
より寸法チェックした後倍率から逆算した。The thickness B of the crimped portion: A cross-sectional photograph of the crimped portion was taken at a magnification of 100 using a scanning electron microscope, and the dimensions were checked with calipers.
【００２５】これら結果をもとに圧着部の厚み保持率は
次式により算出した。Based on these results, the thickness retention of the crimped portion was calculated by the following equation.
【００２６】 圧着部の厚み保持率（％）＝Ｂ／Ａ×１００ ［シート剥離］幅方向２０ｃｍ、長さ方向８０ｃｍの試
料を長さ方向全体にわたって半径が１０ｃｍの円弧状に
折曲げ、剥離の状況を下記基準により評価した。[0026] Thickness retention (%) of the pressure-bonded portion = B / A × 100 [Sheet peeling] A sample having a width of 20 cm and a length of 80 cm is bent into an arc having a radius of 10 cm over the entire length in the longitudinal direction. The situation was evaluated according to the following criteria.
【００２７】評価基準 ○：剥離の全く認められないもの。Evaluation criteria ：: No peeling was observed at all.
【００２８】△：２ｃｍ未満の剥離が１個あるもの。Δ: One with a peeling of less than 2 cm.
【００２９】×：剥離個数が２個以上あるもの。 ［プリーツ加工性］幅が５０ｃｍ、長さが３００ｍであ
るシートをロータリー式プリーツ加工機で折曲げ、ピッ
チ３ｃｍとなるようプリーツ加工し、下記基準により評
価した。×: The number of peeled pieces is 2 or more. [Pleating processability] A sheet having a width of 50 cm and a length of 300 m was bent by a rotary pleating machine, pleated to a pitch of 3 cm, and evaluated according to the following criteria.
【００３０】評価基準 ○：プリーツが鋭角で均一で、シートに蛇行が見られな
い。Evaluation criteria ○: The pleats were sharp and uniform, and no meandering was observed in the sheet.
【００３１】△：プリーツがやや不均一で僅かに蛇行が
認められるが、使用上問題ない。Δ: The pleats are slightly uneven and slight meandering is observed, but there is no problem in use.
【００３２】×：プリーツが不均一でシートに蛇行が見
られ、フィルターユニット組込みに際して、作業上問題
がある。 実施例１，比較例１ 固有粘度が０．６６、融点が２６２℃であるポリエチレ
ンテレフタレートと固有粘度が０．６８、融点が２２８
℃であるイソフタール酸共重合ポリエステルを別々の押
出機で溶融した後、フィラメントのデニールが２デニー
ルであって、全繊維中にしめる低融点成分の比率が１５
％となるように吐出量を調整し、芯鞘紡糸可能な口金よ
り芯鞘フィラメントを紡出した。引続き、紡出フィラメ
ントをエアーサッカーで約５０００ｍの高速牽引をし、
鉛を主体とした衝突板に衝突させ、フィラメントを開繊
し移動するネットコンベアー上に噴射て、さらに捕集し
不織布ウェブとした。C: The sheet has meandering due to non-uniform pleats, and there is a problem in work when assembling the filter unit. Example 1, Comparative Example 1 Polyethylene terephthalate having an intrinsic viscosity of 0.66 and a melting point of 262 ° C. and an intrinsic viscosity of 0.68 and a melting point of 228
After the isophthalic acid copolymerized polyester at a temperature of 200 ° C. was melted in a separate extruder, the denier of the filament was 2 denier and the ratio of the low melting point component in the total fiber was 15%.
%, And the core-sheath filament was spun from a die capable of spinning the core-sheath. Subsequently, the spun filament is pulled at a high speed of about 5000m by air soccer,
The filament was made to collide with a collision plate mainly composed of lead, and the filament was spread and sprayed on a moving net conveyor, and further collected to form a nonwoven fabric web.
【００３３】この際、ネットコンベアーの速度を変更し
て、目付が１２０ｇ／ｍ2 （比較例１）、２００ｇ／ｍ
2 （実施例１−（１）〜（３））、２６０ｇ／ｍ2 （実
施例１−（４）〜（６））、３６０ｇ／ｍ2 （実施例１
−（７）〜（９））の不織布とし、彫刻深さが０．８ｍ
ｍ、圧着部の面積が１５％、温度が２２０℃であるエン
ボスロールで、エンボスロール圧力を変更し、熱圧着を
実施した。引続きシート幅を５０ｃｍとした後、ロータ
リー式プリーツ加工機でプリーツ加工した。結果を表１
に示した。At this time, the speed of the net conveyor was changed so that the basis weight was 120 g / m 2 (Comparative Example 1), 200 g / m
2 (Examples 1- (1) to (3)), 260 g / m 2 (Examples 1- (4) to (6)), 360 g / m 2 (Example 1
-The non-woven fabric of (7) to (9)) and the engraving depth is 0.8 m
m, an embossing roll having an area of a crimping portion of 15% and a temperature of 220 ° C. was used to perform thermocompression bonding while changing the embossing roll pressure. Subsequently, after the sheet width was set to 50 cm, the sheet was pleated by a rotary pleating machine. Table 1 shows the results
It was shown to.
【００３４】[0034]
【表１】 [Table 1]
【００３５】表１から明らかなように、実施例１のもの
は、シートの層間剥離もなく、プリーツ加工性、形態保
持性など良好でフィルター材として満足できるものであ
る。 実施例２ 実施例１と同様の方式で目付が２２０ｇ／ｍ2 である不
織布とし彫刻深さが０．８ｍｍであってエンボスロール
の圧着面積が５％（実施例２−（１））、１０％（実施
例２−（２））、１５％（実施例２−（３））、２０％
（実施例２−（４））、３０％（実施例２−（５））の
５水準につき熱圧着を実施した。引続きシート幅を５０
ｃｍにカットした後、ロータリー式プリーツ加工機でプ
リーツ加工を実施した。結果を表２に示した。As is clear from Table 1, the filter of Example 1 has no delamination of the sheet, has good pleating workability and shape retention, and is satisfactory as a filter material. Example 2 A nonwoven fabric having a basis weight of 220 g / m 2 was formed in the same manner as in Example 1, the engraving depth was 0.8 mm, and the pressure-bonded area of the embossing roll was 5% (Example 2- (1)), 10 % (Example 2- (2)), 15% (Example 2- (3)), 20%
Thermocompression bonding was performed for five levels of (Example 2- (4)) and 30% (Example 2- (5)). Continue to set the seat width to 50
After being cut into cm, pleating was performed with a rotary pleating machine. The results are shown in Table 2.
【００３６】[0036]
【表２】 [Table 2]
【００３７】表２から明らかなように、実施例２のもの
は、毛羽の発生もなく、剥離性、プリーツ加工性など全
く問題ないものであった。 実施例３ 固有粘度が０．６６、融点が２６２℃であるポリエチレ
ンテレフタレートと固有粘度が０．６８、融点が２２８
℃であるイソフタール酸共重合ポリエステルを別々の押
出機で溶融した後、フィラメントのデニールが２デニー
ルであって、全繊維中にしめる低融点の比率を３０％、
２０％、１０％、５％と変更し、鞘成分を共重合ポリエ
ステルとし、芯鞘型口金を使用し、エアーサッカーによ
り約５０００ｍ／分の高速紡糸により芯鞘フィラメント
を紡糸した。紡糸性はいずれも良好であり、目付２００
ｇ／ｍ2 のシートとした。引続き圧着部の面積が１５％
で温度が２００℃であるエンボスロールで熱圧着し、ロ
ータリー式プリーツ加工機でプリーツ加工をしてフィル
ターを生成した結果、得られたシートの層間剥離なども
なく、フィルター材として良好な結果であった。 実施例４ 実施例３と同様の方法で全繊維中にしめる低融点の比率
を１５％としフィラメントのデニールを１デニール、２
デニール、５デニール、１０デニールと変更し紡糸し
た。１デニールは単糸切れが増加、１０デニールは冷却
不足により糸切れが増加したが、操業上問題のないレベ
ルであり、引続き目付３００ｇ／ｍ2 のシートとした。
エンボスロールによる熱圧着後のシートをロータリー式
プリーツ加工機でプリーツ加工してフィルターとしたも
のは、層間剥離はなく、プリーツ加工性も良好であっ
た。 比較例２ 固有粘度が０．６６、融点が２６２℃であるポリエチレ
ンテレフタレート単一成分を押出機で溶融した後、フィ
ラメントのデニールが２デニールとなるように吐出量を
調整し、エアーサッカーで高速牽引し、フィラメントを
開繊し移動するネットコンベアー上に捕集し、引続き表
面温度が２５０℃であるエンボスロールで熱圧着して、
目付２６０ｇ／ｍ2 の不織布を得た。As is evident from Table 2, in Example 2, there was no generation of fluff, and there was no problem in terms of peelability, pleating property and the like. Example 3 Polyethylene terephthalate having an intrinsic viscosity of 0.66 and a melting point of 262 ° C. and an intrinsic viscosity of 0.68 and a melting point of 228
After melting the isophthalic acid copolymerized polyester at a temperature of 2 ° C. in a separate extruder, the denier of the filament is 2 deniers, and the ratio of the low melting point in the total fibers is 30%.
The sheath component was changed to 20%, 10%, and 5%, and the sheath component was made of a copolymerized polyester. Using a core-sheath type die, a core-sheath filament was spun by high-speed spinning at about 5000 m / min by air sucker. The spinning properties were all good and the basis weight was 200.
g / m 2 . Continued crimping area is 15%
Thermocompression bonding with an embossing roll at a temperature of 200 ° C., and pleating with a rotary pleating machine to produce a filter. As a result, there was no delamination of the obtained sheet and the result was good as a filter material. Was. Example 4 In the same manner as in Example 3, the ratio of the low melting point in all the fibers was 15%, and the denier of the filament was 1 denier.
The spinning was changed to denier, 5 denier and 10 denier. 1 denier increased single yarn breakage, and 10 denier increased yarn breakage due to insufficient cooling, but at a level that caused no problem in operation, and was continuously used as a sheet having a basis weight of 300 g / m 2 .
When the sheet after the thermocompression bonding by the embossing roll was pleated with a rotary pleating machine to form a filter, there was no delamination and the pleating workability was good. Comparative Example 2 A single component of polyethylene terephthalate having an intrinsic viscosity of 0.66 and a melting point of 262 ° C. was melted by an extruder, and then the discharge amount was adjusted so that the denier of the filament became 2 deniers. Then, the filament is spread and collected on a moving net conveyor, and subsequently hot-pressed with an embossing roll having a surface temperature of 250 ° C.
A nonwoven fabric with a basis weight of 260 g / m 2 was obtained.
【００３８】この不織布は、接着が不十分であり、層間
剥離があり、プリーツ加工困難なものであった。This nonwoven fabric had insufficient adhesion, had delamination, and had difficulty in pleating.
【００３９】[0039]
【発明の効果】本発明によれば、プリーツ賦型加工して
フィルター材としたときに、剥離欠点の発生もなく、適
度な剛性と形態保持性を有する優れた高性能のフィルタ
ー材を提供できるものである。According to the present invention, it is possible to provide an excellent high-performance filter material having appropriate stiffness and shape retention without causing a peeling defect when pleated and formed into a filter material. Things.
Claims (2)
鞘型フィラメントからなる部分的に熱圧着された不織布
よりなり、該不織布の目付が２００〜３６０ｇ／ｍ2 で
あるとともに、プリーツ賦型加工がされてなることを特
徴とするフィルター材。1. A non-woven fabric which is partially thermocompressed and made of a core-sheath type filament whose core is a high melting point component and whose sheath is a low melting point component, and has a basis weight of 200 to 360 g / m 2 . Filter material characterized by being pleated.
の繊維重量に対して５〜３０％である請求項１記載のフ
ィルター材。2. The filter material according to claim 1, wherein the ratio of the low melting point component is 5 to 30% based on the fiber weight of the core-sheath filament.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000207947A JP3534043B2 (en) | 1994-09-28 | 2000-07-10 | Pleated shaped filter material |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23350794A JP3161245B2 (en) | 1994-09-28 | 1994-09-28 | Filter substrate |
| JP2000207947A JP3534043B2 (en) | 1994-09-28 | 2000-07-10 | Pleated shaped filter material |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23350794A Division JP3161245B2 (en) | 1994-09-28 | 1994-09-28 | Filter substrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001054709A true JP2001054709A (en) | 2001-02-27 |
| JP3534043B2 JP3534043B2 (en) | 2004-06-07 |
Family
ID=32827224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000207947A Expired - Lifetime JP3534043B2 (en) | 1994-09-28 | 2000-07-10 | Pleated shaped filter material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3534043B2 (en) |
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|---|---|---|---|---|
| WO2007088824A1 (en) * | 2006-02-01 | 2007-08-09 | Toray Industries, Inc. | Nonwoven fabric for filters and process for production of the same |
| JP2007231500A (en) * | 2006-02-01 | 2007-09-13 | Toray Ind Inc | Nonwoven fabric for filter and method for producing the same |
| US20100180558A1 (en) * | 2007-05-31 | 2010-07-22 | Toray Industries, Inc | Nonwoven fabric for cylindrical bag filter, process for producing the same, and cylindrical bag filter therefrom |
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| CN104919102A (en) * | 2013-05-16 | 2015-09-16 | 依赫玛过滤器有限公司 | Fibrous nonwoven and method for the production thereof |
| KR20190133737A (en) | 2017-04-12 | 2019-12-03 | 유니티카 가부시끼가이샤 | Manufacturing method of needle punch nonwoven |
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|---|---|---|---|---|
| JP2007231500A (en) * | 2006-02-01 | 2007-09-13 | Toray Ind Inc | Nonwoven fabric for filter and method for producing the same |
| US8187520B2 (en) | 2006-02-01 | 2012-05-29 | Toray Industries, Inc. | Nonwoven fabric for filters and method of producing the same |
| WO2007088824A1 (en) * | 2006-02-01 | 2007-08-09 | Toray Industries, Inc. | Nonwoven fabric for filters and process for production of the same |
| US20100180558A1 (en) * | 2007-05-31 | 2010-07-22 | Toray Industries, Inc | Nonwoven fabric for cylindrical bag filter, process for producing the same, and cylindrical bag filter therefrom |
| CN102985608B (en) * | 2010-07-06 | 2015-11-25 | 东洋纺株式会社 | A kind of spun-bonded non-woven fabrics and the filter using it to make |
| CN102985608A (en) * | 2010-07-06 | 2013-03-20 | 东洋纺株式会社 | Spunbonded nonwoven fabric and filter using same |
| US9011567B2 (en) | 2010-07-06 | 2015-04-21 | Toyobo Co., Ltd. | Spunbonded nonwoven fabric and filter using same |
| CN104919102A (en) * | 2013-05-16 | 2015-09-16 | 依赫玛过滤器有限公司 | Fibrous nonwoven and method for the production thereof |
| KR20190133737A (en) | 2017-04-12 | 2019-12-03 | 유니티카 가부시끼가이샤 | Manufacturing method of needle punch nonwoven |
| US11186931B2 (en) | 2017-04-12 | 2021-11-30 | Unitika Ltd. | Process for producing needle-punched nonwoven fabric |
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| CN114829691A (en) * | 2019-12-23 | 2022-07-29 | 东丽株式会社 | Spun-bonded nonwoven fabric, filter material for dust collector pleated filter, and large-air-volume pulse jet type dust collector |
| CN114829691B (en) * | 2019-12-23 | 2024-02-02 | 东丽株式会社 | Filter medium for spun-bonded nonwoven fabric and dust collector pleated filter, and filter and dust collector |
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| JP3534043B2 (en) | 2004-06-07 |
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