JP2002273125A - Filter medium for air filter - Google Patents
Filter medium for air filterInfo
- Publication number
- JP2002273125A JP2002273125A JP2001079771A JP2001079771A JP2002273125A JP 2002273125 A JP2002273125 A JP 2002273125A JP 2001079771 A JP2001079771 A JP 2001079771A JP 2001079771 A JP2001079771 A JP 2001079771A JP 2002273125 A JP2002273125 A JP 2002273125A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- air filter
- filter medium
- anion exchange
- air
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はエアフィルタ用濾材
に関し、更に詳しくは、高温で加工してもガス吸着性能
低下や悪臭を発生しない陰イオン交換樹脂を含有するエ
アフィルタ用濾材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter medium for an air filter, and more particularly, to a filter medium for an air filter containing an anion exchange resin which does not cause a decrease in gas adsorption performance or a bad smell even when processed at high temperature.
【０００２】[0002]
【従来の技術】半導体の製造において、雰囲気中に塩化
水素や亜硫酸ガス等の酸性ガス状汚染物質が存在する
と、ウエハ上のパターン不良や絶縁破壊を発生する原因
になる。そのため半導体の製造工場では、ガス状汚染物
質をｐｐｂレベルの超低濃度に低減させたクリーンルー
ム内で製造が行われ、そのクリーンルーム内の空気をエ
アフィルタを用いて有害ガスを除去しながら強制循環さ
せるようにしている。2. Description of the Related Art In the manufacture of semiconductors, the presence of acidic gaseous contaminants such as hydrogen chloride and sulfurous acid in the atmosphere causes pattern defects on wafers and dielectric breakdown. Therefore, in a semiconductor manufacturing plant, production is performed in a clean room in which gaseous pollutants are reduced to an extremely low concentration of ppb level, and the air in the clean room is forcedly circulated while removing harmful gases using an air filter. Like that.
【０００３】従来、酸性ガス除去用フィルタとして、陰
イオン交換樹脂を使う方法があるが、従来のフィルタに
使用されていた陰イオン交換樹脂は、いずれも耐熱性が
低く、官能基周辺の立体障害が大きく、５０〜６０℃で
熱分解が始まっていた。Conventionally, there is a method using an anion exchange resin as a filter for removing an acidic gas. However, any of the anion exchange resins used in the conventional filters has low heat resistance and steric hindrance around a functional group. And thermal decomposition had begun at 50 to 60 ° C.
【０００４】そのため、湿式抄紙で陰イオン交換樹脂を
含有させた紙を製造する場合の乾燥工程等で６０℃以上
の温度で加熱すると陰イオン交換樹脂が熱分解して、ト
リメチルアミンを発生するため、非常に強い悪臭がする
という問題があった。また、官能基がはずれるため、イ
オン交換性能が低下し、エアフィルタとしての能力も低
下してしまうという問題があった。従って、乾燥工程を
低温で行わなければならないため、生産性が低いという
問題があった。[0004] Therefore, when heated at a temperature of 60 ° C. or more in a drying step or the like in the production of paper containing an anion exchange resin in wet papermaking, the anion exchange resin is thermally decomposed to generate trimethylamine. There was a problem of very strong odor. In addition, there is a problem in that the ion exchange performance is reduced and the performance as an air filter is also reduced because the functional group is detached. Therefore, there is a problem that productivity is low because the drying process must be performed at a low temperature.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、高温
で加工しても性能が低下したり悪臭を発生しにくい、生
産性に優れた陰イオン交換樹脂を含有するエアフィルタ
用濾材を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a filter material for an air filter containing an anion exchange resin which is excellent in productivity and hardly deteriorates even when processed at a high temperature and does not easily generate odor. Is to do.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成する本発
明のエアフィルタ用濾材は、イオン交換容量が０．５ｍ
ｅｑ／ｇ以上で、１００℃以上の耐熱性を有する陰イオ
ン交換樹脂を含む紙又は不織布からなることを特徴とす
る。The filter medium for an air filter according to the present invention, which achieves the above object, has an ion exchange capacity of 0.5 m.
It is characterized by being made of paper or non-woven fabric containing an anion exchange resin having a heat resistance of 100 ° C. or more at eq / g or more.
【０００７】このように、１００℃以上の耐熱性を有す
る陰イオン交換樹脂をエアフィルタ用濾材に含有させた
ため、湿式抄紙における乾燥工程等を高温で行っても、
分解が少ないため、悪臭が大幅に減少し、また性能の低
下も抑制することが可能となる。また、高温処理が可能
であるため、生産性を向上することが出来る。As described above, since the anion exchange resin having heat resistance of 100 ° C. or more is contained in the filter medium for the air filter, even if the drying step in wet papermaking is performed at a high temperature,
Since the decomposition is small, it is possible to significantly reduce the bad smell and also suppress the deterioration of the performance. Further, since high-temperature treatment is possible, productivity can be improved.
【０００８】[0008]
【発明の実施の形態】本発明において、エアフィルタ用
濾材は、酸性ガス吸着剤として陰イオン交換樹脂を含有
する紙又は不織布から構成される。また、この紙又は不
織布にはパルプや熱可塑性樹脂を含有させてもよい。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a filter medium for an air filter is made of paper or nonwoven fabric containing an anion exchange resin as an acidic gas adsorbent. The paper or nonwoven fabric may contain pulp or a thermoplastic resin.
【０００９】酸性ガス吸着剤として用いる陰イオン交換
樹脂としては、イオン交換容量が０．５ｍｅｑ／ｇ以上
であって、かつ１００℃以上の耐熱性を有するものを使
用する。より好ましくは、イオン交換容量０．５〜１０
ｍｅｑ／ｇで、１００℃以上の耐熱性を有するものがよ
い。As the anion exchange resin used as the acid gas adsorbent, one having an ion exchange capacity of 0.5 meq / g or more and a heat resistance of 100 ° C. or more is used. More preferably, the ion exchange capacity is 0.5 to 10
Those having a heat resistance of 100 ° C. or more at meq / g are preferred.
【００１０】イオン交換容量とはイオン交換体の単位量
当たりの交換基の総数をいい、ここでは、Ｃｌ- 形の乾
燥陰イオン交換樹脂１ｇ当たりの交換基のミリ当量数を
いう。The ion exchange capacity refers to the total number of exchange groups per unit amount of the ion exchanger, and here refers to the number of milliequivalent exchange groups per gram of dry anion exchange resin in Cl - form.
【００１１】イオン交換容量が０．５ｍｅｑ／ｇ未満で
は、イオン交換能力が低過ぎ、酸性ガス吸着性が低下す
るため、陰イオン交換樹脂の含有量を増やしたとしても
ガス吸着性エアフィルタとして機能するだけの酸性ガス
吸着量を確保することは難しくなる。If the ion exchange capacity is less than 0.5 meq / g, the ion exchange capacity is too low, and the acid gas adsorbing property is reduced. Therefore, even if the content of the anion exchange resin is increased, it functions as a gas adsorbing air filter. It is difficult to secure an acid gas adsorption amount that is as high as possible.
【００１２】また、「１００℃の耐熱性を有する」とは
１００℃で１ヶ月保持した後、官能基残存率が８０％以
上であることをいう。官能基残存率の測定法は以下に説
明する方法で行うものとする。Further, "having heat resistance of 100 ° C." means that after being kept at 100 ° C. for one month, the residual ratio of functional groups is 80% or more. The method for measuring the residual ratio of the functional groups is to be performed by the method described below.
【００１３】１００℃で陰イオン交換樹脂を加熱する前
後で、加熱前の陰イオン交換樹脂の乾燥樹脂重量当りの
総交換容量Ｑａと、１ヶ月加熱保持した後の陰イオン交
換樹脂の乾燥樹脂重量当りの総交換容量Ｑｂを測定し、
次の式（ＩＩ）から官能基残存率を計算する。 官能基残存率（％）＝［Ｑｂ／Ｑａ］×１００ ・・・（ＩＩ） また、上記陰イオン交換樹脂の総交換容量は以下の方法
で求めるものとする。Before and after heating the anion exchange resin at 100 ° C., the total exchange capacity Qa per dry resin weight of the anion exchange resin before heating and the dry resin weight of the anion exchange resin after heating and holding for one month The total exchange capacity per unit Qb,
The residual ratio of the functional group is calculated from the following formula (II). Functional group residual rate (%) = [Qb / Qa] × 100 (II) The total exchange capacity of the anion exchange resin is determined by the following method.
【００１４】総交換容量の測定方法： １）基準形の調整法 陰イオン交換樹脂２０ｍｌを樹脂塔に充填し、２規定の
ＮａＯＨを空間速度約７０で１５００ｍｌ流し、次に脱
塩水約１０００ｍｌを流して洗浄する。次に５ｗｔ％の
ＮａＣｌ水溶液５００ｍｌを空間速度約７０で流して陰
イオン交換樹脂をＣｌ形にした後、脱塩水を空間速度約
７０で流してフェノールフタレイン指示薬で中性になる
まで洗浄する。この操作により得られた陰イオン交換樹
脂を基準形という。Measurement method of total exchange capacity: 1) Adjustment method of standard form A resin tower is filled with 20 ml of anion exchange resin, 1500 ml of 2N NaOH is flown at a space velocity of about 70, and then about 1000 ml of deionized water is flown. And wash. Next, 500 ml of a 5 wt% NaCl aqueous solution is flown at a space velocity of about 70 to convert the anion exchange resin into Cl form, and then demineralized water is flowed at a space velocity of about 70 and washed with a phenolphthalein indicator until neutral. The anion exchange resin obtained by this operation is called a reference form.
【００１５】２）中性塩分解容量測定法 基準形にした陰イオン交換樹脂１０ｍｌを樹脂塔に充填
し、２規定のＮａＯＨを空間速度約７０で７５０ｍｌ流
して陰イオン交換樹脂をＯＨ形にする。次に、脱塩水約
１０００ｍｌを空間速度約７０で充填塔に流す。その
後、５ｗｔ％のＮａＣｌ水溶液２５０ｍｌを空間速度約
７０で充填塔に流し、流出液から５０ｍｌを正確に取
り、メチルレッド・メチレンブルー混合指示薬を用いて
０．１規定ＨＣｌ水溶液で滴定し、中性塩分解容量（ｍ
ｅｑ／ｍｌ）を算出する。さらに基準形の樹脂中の単位
体積中に含まれる乾燥樹脂重量を測定し、その値で上記
中性塩分解容量を除して乾燥樹脂重量当りの中性塩分解
容量（ｍｅｑ／ｇ）を求める。2) Method for measuring neutral salt decomposition capacity A resin tower is filled with 10 ml of a standard anion exchange resin, and 750 ml of 2N NaOH is flowed at a space velocity of about 70 to convert the anion exchange resin into the OH form. . Next, about 1000 ml of demineralized water is passed through the packed tower at a space velocity of about 70. Thereafter, 250 ml of a 5 wt% NaCl aqueous solution is passed through the packed tower at a space velocity of about 70, 50 ml is accurately taken from the effluent, and titrated with a 0.1 N aqueous HCl solution using a mixed indicator of methyl red / methylene blue to obtain neutral salt. Decomposition capacity (m
eq / ml). Further, the weight of the dry resin contained in the unit volume of the resin of the standard form is measured, and the neutral salt decomposition capacity is divided by the value to obtain the neutral salt decomposition capacity per dry resin weight (meq / g). .
【００１６】３）弱塩基交換容量測定法 上記「２）中性塩分解容量測定法」において、５ｗｔ％
のＮａＣｌ水溶液を樹脂塔に流した後、０．１ＮのＨＣ
ｌ水溶液を空間速度１０で樹脂塔に１００ｍｌ流す。次
に５０ｍｌのメタノールを樹脂塔に流して陰イオン交換
樹脂を洗浄し、更に樹脂塔内に残留する液は、樹脂塔を
加圧することにより押し出す。そして、流出した上記Ｈ
Ｃｌ水溶液を樹脂塔に流したときの流出液及びメタノー
ルによる洗浄液を足し合わして、1 規定のＮａＯＨ水溶
液でメチルレッド・メチレンブルー混合指示薬を用いて
滴定し、弱塩基交換容量（ｍｅｑ／ｍｌ）を算出する。
さらに基準形の樹脂中の単位体積中に含まれる乾燥樹脂
重量を測定し、その値で上記弱塩基交換容量を除して乾
燥樹脂重量当りの弱塩基交換容量（ｍｅｑ／ｇ）を求め
る。3) Method for measuring weak base exchange capacity In the above “2) Method for measuring neutral salt decomposition capacity, 5 wt%
NaCl aqueous solution was passed through a resin tower, and then 0.1N HC
100 ml of the aqueous solution is flowed into the resin tower at a space velocity of 10. Next, 50 ml of methanol is passed through the resin tower to wash the anion exchange resin, and the liquid remaining in the resin tower is extruded by pressurizing the resin tower. And the H
The effluent when the aqueous Cl solution was passed through the resin tower and the washing solution with methanol were added together, and titrated with a 1N aqueous NaOH solution using a methyl red / methylene blue mixed indicator to calculate the weak base exchange capacity (meq / ml). I do.
Further, the weight of the dry resin contained in the unit volume of the resin of the standard form is measured, and the above-mentioned weak base exchange capacity is divided by the value to obtain a weak base exchange capacity per dry resin weight (meq / g).
【００１７】４）総交換容量算出法 総交換容量は上記中性塩分解容量と弱塩基交換容量とを
足し合わせたものである。4) Calculation method of total exchange capacity The total exchange capacity is the sum of the neutral salt decomposition capacity and the weak base exchange capacity.
【００１８】尚、空間速度は樹脂塔を流す液体の容積速
度（ｍｌ／時間）を樹脂塔に充填した樹脂の容積（ｍ
ｌ）で割った値である。The space velocity is determined by the volume velocity (ml / hour) of the liquid flowing through the resin tower and the volume (m) of the resin charged in the resin tower.
l).
【００１９】また、単位体積中に含まれる乾燥樹脂重量
は、基準形の樹脂１０ｍｌを秤取した試料を、１０５℃
±２℃の乾燥器中で約４時間乾燥した後、デシケーター
中で３０分間放冷して重さを量り、その重さを乾燥前の
試料体積１０ｍｌで除して算出する。The weight of the dry resin contained in the unit volume was determined by measuring a sample obtained by weighing 10 ml of the standard resin at 105 ° C.
After drying in a dryer at ± 2 ° C. for about 4 hours, the mixture is allowed to cool in a desiccator for 30 minutes, weighed, and calculated by dividing the weight by the sample volume before drying of 10 ml.
【００２０】本発明に用いる陰イオン交換樹脂は、イオ
ン交換容量が０．５ｍｅｑ／ｇ以上で、１００℃以上の
耐熱性を有するものであれば特に限定されないが、特に
式（Ｉ）で表される陰イオン交換樹脂が好ましい。この
陰イオン交換樹脂は、官能基周辺の立体障害が少ないた
め、熱分解し難い分子構造になっている。The anion exchange resin used in the present invention is not particularly limited as long as it has an ion exchange capacity of 0.5 meq / g or more and a heat resistance of 100 ° C. or more, but is particularly represented by the formula (I). Anion exchange resins are preferred. This anion exchange resin has a steric hindrance around the functional group, and thus has a molecular structure that is difficult to thermally decompose.
【００２１】[0021]
【化２】 式（Ｉ）においてｌ、ｍ、ｎ、ｌ’、ｍ’、ｎ’は自然
数。ＲはＨ、アルキル鎖、またはアルキル鎖に官能基が
導入されてなるものを表す。Embedded image In the formula (I), l, m, n, l ', m' and n 'are natural numbers. R represents H, an alkyl chain, or a product obtained by introducing a functional group into the alkyl chain.
【００２２】上記式（Ｉ）の陰イオン交換樹脂は、１０
０℃以上の耐熱性を有し、イオン交換容量は１．５ｍｅ
ｑ／ｇ〜５ｍｅｑ／ｇである。The anion exchange resin of the above formula (I) is 10
Has heat resistance of 0 ° C or higher, and ion exchange capacity of 1.5 me
q / g to 5 meq / g.
【００２３】エアフィルタ用濾材に、このような耐熱性
のある陰イオン交換樹脂を含有させたため、湿式抄紙に
おける乾燥工程や、熱溶可塑性樹脂を含有させた場合の
融着工程等に、１００℃以上で陰イオン交換樹脂は分解
し難く、悪臭は発生し難い。従って、濾材の生産性も向
上することができる。Since the filter medium for an air filter contains such a heat-resistant anion-exchange resin, it can be used at a temperature of 100 ° C. in a drying step in wet papermaking or a fusing step when a thermoplastic resin is contained. As described above, the anion exchange resin is hardly decomposed and a bad smell is hardly generated. Therefore, the productivity of the filter medium can be improved.
【００２４】本発明のエアフィルタ用濾材は、空気通過
方向と平行に多列に濾材を配列した平行流型フィルタに
加工しても、或いは空気通過方向と垂直に濾材を配列し
た直交流型フィルタに加工してもよい。The filter medium for an air filter of the present invention can be processed into a parallel flow type filter in which the filter medium is arranged in multiple rows in parallel with the air passage direction, or a cross-flow type filter in which the filter medium is arranged perpendicular to the air passage direction. May be processed.
【００２５】平行流型フィルタは、濾材に囲まれたエア
通路を多数平行に配列した集積構造体として形成され、
その多数のエア通路内に空気を平行に流すことにより、
濾材中の陰イオン交換樹脂により濾材表面でガスの吸着
除去が行われる。一般には、所謂段ボール加工により、
波形に加工した濾材と平面状態の濾材とを重ねて相互の
接点を接着して片側段ボール材にし、この片側段ボール
材を複数段に積層し相互接着し、多数の平行流路を有す
る集積構造体に加工したものである。この集積構造体
（平行流型フィルタ）はフレームに組み付けられ、エア
フィルタユニットとして完成する。The parallel flow filter is formed as an integrated structure in which a large number of air passages surrounded by a filter medium are arranged in parallel.
By flowing air in parallel in the many air passages,
The gas is adsorbed and removed on the surface of the filter medium by the anion exchange resin in the filter medium. Generally, by so-called corrugated cardboard processing,
An integrated structure having a large number of parallel flow paths by laminating a corrugated filter medium and a filter medium in a planar state, bonding the mutual contacts to each other to form a single-sided corrugated cardboard material, laminating the single-sided corrugated cardboard materials in a plurality of stages, and bonding them together. It has been processed into. This integrated structure (parallel flow type filter) is assembled to a frame to complete an air filter unit.
【００２６】本発明のエアフィルタ用濾材を平行流型フ
ィルタに加工する場合には、陰イオン交換樹脂の含有量
は、１０〜９０ｗｔ％が好ましく、さらには、２５〜７
０ｗｔ％が好ましい。１０ｗｔ％未満であると酸性ガス
の交換量が少なくなり、９０ｗｔ％を超えると、濾材か
ら脱落し易くなるため好ましくない。また本発明エアフ
ィルタ用濾材に含まれるパルプは５〜５０ｗｔ％の範囲
で含有することが好ましい。パルプの含有量が５ｗｔ％
未満であると陰イオン交換樹脂の保持が難しくなり、５
０ｗｔ％を超えると、陰イオン交換樹脂の含有量が相対
的に低下し、ガス吸着性が低下するため好ましくない。When the filter material for an air filter of the present invention is processed into a parallel flow filter, the content of the anion exchange resin is preferably from 10 to 90 wt%, more preferably from 25 to 7 wt%.
0 wt% is preferred. If the amount is less than 10 wt%, the amount of exchange of the acid gas becomes small, and if it exceeds 90 wt%, it is not preferable because it easily falls off from the filter medium. The pulp contained in the filter medium for an air filter of the present invention is preferably contained in the range of 5 to 50% by weight. Pulp content of 5wt%
If it is less than 5, the retention of the anion exchange resin becomes difficult, and 5
If it exceeds 0% by weight, the content of the anion exchange resin relatively decreases, and the gas adsorbability decreases, which is not preferable.
【００２７】このように紙または不織布に陰イオン交換
樹脂を含有させたエアフィルタ用濾材の秤量は、エアフ
ィルタの用途に応じて適宜設定することが出来るが、３
０〜３００ｇ／ｍ2 が好ましい。３０ｇ／ｍ2 より少な
いと十分なガス吸着性が得られなくなる。また、３００
ｇ／ｍ2 を超えると濾紙が硬くなり、平行流型フィルタ
等への加工性が悪化する。The weighing amount of the filter medium for an air filter in which an anion exchange resin is contained in paper or nonwoven fabric can be appropriately set according to the use of the air filter.
0-300 g / m < 2 > is preferable. If it is less than 30 g / m 2 , sufficient gas adsorption cannot be obtained. Also, 300
If it exceeds g / m 2 , the filter paper becomes hard, and the processability into a parallel flow filter or the like deteriorates.
【００２８】また、本発明のエアフィルタ用濾材には熱
可塑性樹脂を含有させることが好ましい。熱可塑性樹脂
を使用すると、エアフィルタ用濾材から平行流型フィル
タを加工するとき、濾材同士を融着により接着できるた
め、接着剤を使用することなく接着を行うことが可能に
なる。一般に接着剤は揮発性の有機成分を含むため、エ
アフィルタに加工した後、その使用中に微量の汚染ガス
を発生する。従って、このエアフィルタが半導体製造工
場のクリーンルームに使用された場合には、発生ガスに
よって半導体が汚染されることになる。しかし、熱可塑
性樹脂をエアフィルタ用濾材に含有させ、これにより融
着させた場合には、このような障害をなくすことが出来
る。It is preferable that the filter medium for an air filter of the present invention contains a thermoplastic resin. When a thermoplastic resin is used, when a parallel flow type filter is processed from a filter material for an air filter, the filter materials can be bonded to each other by fusion, so that the bonding can be performed without using an adhesive. Generally, the adhesive contains a volatile organic component, so that after being processed into an air filter, a small amount of polluting gas is generated during use. Therefore, when this air filter is used in a clean room of a semiconductor manufacturing plant, the generated gas contaminates the semiconductor. However, when the thermoplastic resin is contained in the filter material for an air filter and fused by this, such an obstacle can be eliminated.
【００２９】エアフィルタ用濾材を平行流型フィルタに
加工する場合、エアフィルタ用濾材中の熱可塑性樹脂の
含有量は５〜４０ｗｔ％の範囲が好ましい。５ｗｔ％未
満であると濾材同士を融着することが難しくなる。ま
た、４０ｗｔ％よりも多くすると、相対的に陰イオン交
換樹脂の含有量が少なくなるため酸性ガス吸着量が低化
する。When the air filter material is processed into a parallel flow filter, the content of the thermoplastic resin in the air filter material is preferably in the range of 5 to 40 wt%. If it is less than 5 wt%, it will be difficult to fuse the filter media together. On the other hand, when the content is more than 40 wt%, the content of the anion exchange resin is relatively reduced, so that the acid gas adsorption amount is reduced.
【００３０】本発明で使用する熱可塑性樹脂は繊維状の
熱可塑性繊維が好ましい。繊維状にすることにより、抄
紙を行う際に分散性が向上するため好ましい。The thermoplastic resin used in the present invention is preferably a fibrous thermoplastic fiber. The use of a fibrous shape is preferable because dispersibility is improved when paper is made.
【００３１】本発明のエアフィルタ用濾材の他の加工形
態である直交流型フィルタはシート状のエアフィルタ用
濾材を１枚乃至複数枚の積層体にし、その単一シート又
は積層体に直行するように空気を通過させる透過型フィ
ルタである。A cross-flow type filter, which is another processing form of the filter material for an air filter of the present invention, is formed by laminating one or more sheet-like filter materials for an air filter, and is orthogonal to the single sheet or the laminate. Is a transmission type filter that allows air to pass through.
【００３２】直交流型フィルタを構成するエアフィルタ
用濾材は、少なくとも熱可塑性樹脂および陰イオン交換
樹脂を含む紙または不織布であることが好ましいが、平
行流型フィルターを構成するエアフィルタ用濾材と同様
にパルプを含んでもよい。The filter material for the air filter constituting the cross-flow type filter is preferably paper or nonwoven fabric containing at least a thermoplastic resin and an anion exchange resin, but is similar to the filter material for the air filter constituting the parallel flow type filter. May contain pulp.
【００３３】本発明のエアフィルタ用濾材を直交流型フ
ィルタに加工する場合には、陰イオン交換樹脂は２０〜
９５ｗｔ％が好ましい。２０ｗｔ％未満では酸性ガスの
交換量が少なくなり、９５ｗｔ％を超えると、基材から
脱落し易くなるため好ましくない。When the filter material for an air filter of the present invention is processed into a cross-flow type filter, the anion exchange resin should be 20 to
95 wt% is preferred. If the amount is less than 20 wt%, the amount of exchange of the acid gas will be small, and if it exceeds 95 wt%, it will be easy to fall off the substrate, which is not preferable.
【００３４】陰イオン交換樹脂を含有させたエアフィル
タ用濾材の秤量は、エアフィルタの用途に応じて適宜設
定することが出来るが、７０〜１２００ｇ／ｍ2 が好ま
しい。７０ｇ／ｍ2 より少ないと十分なガス吸着性が得
られなくなる。また、１２００ｇ／ｍ2 を超えると濾材
の空気透過性が悪くなり、直行流型フィルタとしての圧
力損失が大きくなってしまう。直交流型フィルタにおい
て、酸性ガスの吸着量を増やす場合には、単位面積当り
の陰イオン交換樹脂量を多くすることにより、酸性ガス
と陰イオン交換樹脂との接触量を増やす方法が効果的で
あるため、秤量の上限が１２００ｇ／ｍ2 と大きくなっ
ている。The weight of the filter medium for an air filter containing an anion exchange resin can be appropriately set according to the use of the air filter, but is preferably 70 to 1200 g / m 2 . If it is less than 70 g / m 2 , sufficient gas adsorption cannot be obtained. On the other hand, if it exceeds 1200 g / m 2 , the air permeability of the filter medium deteriorates, and the pressure loss as a direct flow filter increases. In the case of increasing the adsorption amount of the acidic gas in the cross-flow type filter, it is effective to increase the amount of the anion exchange resin per unit area to increase the contact amount between the acidic gas and the anion exchange resin. Therefore, the upper limit of weighing is as large as 1200 g / m 2 .
【００３５】また、エアフィルタ用濾材中の熱可塑性樹
脂の含有量は５〜８０ｗｔ％の範囲が好ましい。５ｗｔ
％未満であると濾材同士を融着することが難しくなる。
また、８０ｗｔ％よりも多くすると、相対的に陰イオン
交換樹脂の含有量が少なくなるため酸性ガス吸着量が低
化する。The content of the thermoplastic resin in the filter medium for an air filter is preferably in the range of 5 to 80 wt%. 5wt
%, It becomes difficult to fuse the filter media with each other.
On the other hand, when the content is more than 80 wt%, the content of the anion exchange resin is relatively reduced, so that the acid gas adsorption amount is reduced.
【００３６】本発明において使用する、熱可塑性樹脂は
平行流型フィルタ及び直交流型フィルタにいずれに使用
する場合でも特に限定されないが、好ましくは融点が７
０〜１３０℃の熱可塑性樹脂を使用するとよい。例え
ば、ポリエチレン、変性ポリエステル、ポリプロピレ
ン、ポリアクリロニトリル及びこれら重合体を主成分と
する共重合体などが挙げられる。The thermoplastic resin used in the present invention is not particularly limited when used for a parallel flow type filter or a cross-flow type filter.
It is preferable to use a thermoplastic resin of 0 to 130 ° C. Examples include polyethylene, modified polyester, polypropylene, polyacrylonitrile, and copolymers containing these polymers as main components.
【００３７】本発明エアフィルタ用濾材は融点が１００
℃付近の熱可塑性樹脂を使用するため、エアーフィルタ
用濾材を加熱して熱可塑性樹脂を融解するときに、含有
する耐熱性１００℃以上の陰イオン交換樹脂の分解が進
行し難いため、悪臭が発生し難く、また性能も低下し難
い。The filter material of the present invention has a melting point of 100.
When using a thermoplastic resin around ℃, when the air filter material is heated and the thermoplastic resin is melted, the decomposition of the anion exchange resin containing heat resistance of 100 ℃ or more is difficult to proceed, and the odor is bad. It hardly occurs, and the performance is hard to decrease.
【００３８】本発明のエアフィルタ用濾材に使用する熱
可塑性樹脂は繊維状の熱可塑性繊維が好ましい。繊維状
にすることにより、抄紙を行う際に分散性が向上するた
め好ましい。The thermoplastic resin used for the air filter material of the present invention is preferably fibrous thermoplastic fiber. The use of a fibrous shape is preferable because dispersibility is improved when paper is made.
【００３９】熱可塑性繊維の繊維形態は、円形断面、異
形断面のいずれであってもよいが、芯鞘構造が好まし
い。特に、芯成分が鞘成分よりも高い融点の熱可塑性樹
脂の組合せにした芯鞘構造が好ましい。芯鞘構造の複合
繊維にすると、芯成分の外側を覆う鞘成分が初めに溶融
し、鞘成分だけが溶融した状態でプレス処理することに
より、繊維間を相互融着させ、芯成分は繊維形態を保持
したまま高い強度と剛性を維持することができる。そし
て、鞘成分より芯成分の融点を高くすると、芯成分を溶
融させずに、鞘成分だけを容易に選択的に溶融させるこ
とができるため、より好ましい。The fiber form of the thermoplastic fiber may be either a circular cross section or an irregular cross section, but a core-sheath structure is preferred. In particular, a core-sheath structure in which the core component is a combination of a thermoplastic resin having a higher melting point than the sheath component is preferable. In the case of a conjugate fiber having a core-sheath structure, the sheath component covering the outside of the core component is first melted, and the fibers are mutually fused by pressing in a state where only the sheath component is melted. While maintaining high strength and rigidity. It is more preferable that the melting point of the core component be higher than that of the sheath component, because only the sheath component can be easily and selectively melted without melting the core component.
【００４０】上述した、陰イオン交換樹脂を含有するエ
アフィルタ用濾材は耐熱性があり、濾材の加工過程にお
いて高温になる場合があっても、分解し難く、トリメチ
ルアミン等が発生し難いが、それでも微量のトリメチル
アミン等が発生する可能性はある。そのため、エアフィ
ルタ用濾材に陽イオン交換樹脂又は陽イオン交換繊維を
含有させることにより、発生した微量のトリメチルアミ
ン等を吸着させることができる。陽イオン交換樹脂又は
陽イオン交換繊維としては、一般的に用いられるもので
あれば、特に制限するものではないが、例えば、スチレ
ンとジビニルベンゼンの共重合体やポリスチレンとポリ
エチレンからなる繊維状基材に、陽イオン交換基である
スルホン酸基、ホスホン酸基、カルボン酸基、イミノジ
酢酸基を導入したものや、ポリエチレン不織布基材に放
射線グラフト重合によって、上記陽イオン交換基を導入
したものを用いることができる。The above-described filter material for an air filter containing an anion exchange resin has heat resistance, and is hardly decomposed and does not easily generate trimethylamine and the like even when the temperature of the filter material may be high in the process of processing. There is a possibility that a small amount of trimethylamine or the like is generated. Therefore, by including a cation exchange resin or a cation exchange fiber in the filter medium for an air filter, a small amount of trimethylamine or the like generated can be adsorbed. The cation exchange resin or cation exchange fiber is not particularly limited as long as it is generally used.For example, a fibrous base material composed of a copolymer of styrene and divinylbenzene or polystyrene and polyethylene In addition, those having sulfonic acid groups, phosphonic acid groups, carboxylic acid groups, and iminodiacetic acid groups, which are cation exchange groups, or those having the cation exchange groups introduced by radiation graft polymerization on a polyethylene nonwoven fabric substrate are used. be able to.
【００４１】陽イオン交換樹脂又は陽イオン交換繊維の
含有量は２０ｗｔ％以下が好ましい。２０ｗｔ％以上含
有すると、陰イオン交換樹脂の含有率が少なくなり、結
果としてフィルタとしての酸性ガス吸着性能が下がって
しまうので好ましくない。The content of the cation exchange resin or the cation exchange fiber is preferably 20% by weight or less. If it is contained in an amount of 20 wt% or more, the content of the anion exchange resin decreases, and as a result, the acidic gas adsorption performance as a filter is undesirably reduced.
【００４２】[0042]
【発明の効果】本発明によれば、上述したように、１０
０℃以上の耐熱性を有する陰イオン交換樹脂をエアフィ
ルタ用濾材に含有させたため、湿式抄紙における乾燥工
程等を高温で行っても、分解が少ないため、悪臭が大幅
に減少し、また性能の低下も抑制することが可能とな
る。また、高温処理が可能であるため、生産性を向上す
ることが出来る。According to the present invention, as described above, 10
Since an anion exchange resin having a heat resistance of 0 ° C. or more is contained in the filter medium for the air filter, even if the drying step in wet papermaking is performed at a high temperature, the decomposition is small, and the offensive odor is greatly reduced. It is also possible to suppress the decrease. Further, since high-temperature treatment is possible, productivity can be improved.
フロントページの続き Ｆターム(参考） 4D019 AA01 BA12 BA13 BB05 BC04 BC12 DA06 4G066 AC02C AC14B AE10B BA03 CA23 CA31 DA05 Continued on the front page F term (reference) 4D019 AA01 BA12 BA13 BB05 BC04 BC12 DA06 4G066 AC02C AC14B AE10B BA03 CA23 CA31 DA05
Claims (13)
で、１００℃以上の耐熱性を有する陰イオン交換樹脂を
含む紙又は不織布からなるエアフィルタ用濾材。1. A filter medium for an air filter comprising a paper or a nonwoven fabric containing an anion exchange resin having an ion exchange capacity of 0.5 meq / g or more and a heat resistance of 100 ° C. or more.
で表される請求項１記載のエアフィルタ用濾材。 【化１】 式（Ｉ）においてｌ、ｍ、ｎ、ｌ’、ｍ’、ｎ’は自然
数。ＲはＨ、アルキル鎖、またはアルキル鎖に官能基が
導入されてなるものを表す。2. The method according to claim 1, wherein the anion exchange resin has the following formula (I):
The filter medium for an air filter according to claim 1, which is represented by the following formula. Embedded image In the formula (I), l, m, n, l ', m' and n 'are natural numbers. R represents H, an alkyl chain, or a product obtained by introducing a functional group into the alkyl chain.
した平行流型フィルタを構成する請求項１または２に記
載のエアフィルタ用濾材。3. The filter medium for an air filter according to claim 1, wherein the filter medium comprises a parallel flow filter in which filter media are arranged in multiple rows in parallel with the air passage direction.
性樹脂を含み、前記陰イオン交換樹脂の含有量が１０〜
９０ｗｔ％の範囲にあって、かつ秤量が３０〜３００ｇ
／ｍ2 の範囲にある請求項３に記載のエアフィルタ用濾
材。4. The paper or nonwoven fabric contains pulp and a thermoplastic resin, and the content of the anion exchange resin is 10 to 10.
It is in the range of 90 wt% and weighs 30-300 g
The filter medium for an air filter according to claim 3, which is in the range of / m 2 .
有する請求項４に記載のエアフィルタ用濾材。5. The air filter medium according to claim 4, wherein the pulp is contained in a range of 5 to 50 wt%.
囲で含有する請求項４又は５に記載のエアフィルタ用濾
材。6. The filter medium for an air filter according to claim 4, wherein the thermoplastic resin is contained in a range of 5 to 40% by weight.
した直交流型フィルタを構成する請求項１又は２に記載
のエアフィルタ用濾材。7. The filter medium for an air filter according to claim 1, wherein the filter medium comprises a cross-flow filter in which filter media are arranged in multiple rows perpendicular to the air passage direction.
み、前記陰イオン交換樹脂の含有量が２０〜９５ｗｔ％
の範囲にあって、かつ秤量が７０〜１２００ｇ／ｍ2 の
範囲である請求項７記載のエアフィルタ用濾材。8. The paper or nonwoven fabric contains a thermoplastic resin, and the content of the anion exchange resin is 20 to 95 wt%.
In the range of, and basis weight in the range of 70~1200g / m 2 according to claim 7 medium for an air filter according.
の含有量が５〜８０ｗｔ％である請求項８記載のエアフ
ィルタ用濾材。9. The filter medium for an air filter according to claim 8, comprising a thermoplastic resin, wherein the content of the thermoplastic resin is 5 to 80% by weight.
０℃である請求項４、５、６、８又は９に記載のエアフ
ィルタ用濾材。10. The thermoplastic resin having a melting point of 70-13.
The filter medium for an air filter according to claim 4, which has a temperature of 0 ° C.
る請求項４，５，６，８，９、または１０に記載のエア
フィルタ用濾材。11. The air filter material according to claim 4, wherein the thermoplastic resin is a thermoplastic fiber.
請求項４、５、６、８、９、１０又は１１に記載のエア
フィルタ用濾材。12. The air filter material according to claim 4, wherein the thermoplastic resin has a core-sheath structure.
維を含有する請求項１〜１２のいずれかに記載のエアフ
ィルタ用濾材。13. The air filter medium according to claim 1, which comprises a cation exchange resin or a cation exchange fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001079771A JP2002273125A (en) | 2001-03-21 | 2001-03-21 | Filter medium for air filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001079771A JP2002273125A (en) | 2001-03-21 | 2001-03-21 | Filter medium for air filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002273125A true JP2002273125A (en) | 2002-09-24 |
Family
ID=18936154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001079771A Pending JP2002273125A (en) | 2001-03-21 | 2001-03-21 | Filter medium for air filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002273125A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004181368A (en) * | 2002-12-03 | 2004-07-02 | Nippon Muki Co Ltd | Filter medium for gas removal filter, and gas removal filter |
| JP2006212509A (en) * | 2005-02-02 | 2006-08-17 | Nichias Corp | Sheet for air filter, its manufacturing method and air filter |
| JP2008080333A (en) * | 2006-09-27 | 2008-04-10 | Lanxess Deutschland Gmbh | Heat-stable anion exchanger |
-
2001
- 2001-03-21 JP JP2001079771A patent/JP2002273125A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004181368A (en) * | 2002-12-03 | 2004-07-02 | Nippon Muki Co Ltd | Filter medium for gas removal filter, and gas removal filter |
| JP2006212509A (en) * | 2005-02-02 | 2006-08-17 | Nichias Corp | Sheet for air filter, its manufacturing method and air filter |
| JP2008080333A (en) * | 2006-09-27 | 2008-04-10 | Lanxess Deutschland Gmbh | Heat-stable anion exchanger |
| JP4744494B2 (en) * | 2006-09-27 | 2011-08-10 | ランクセス・ドイチュランド・ゲーエムベーハー | Thermostable anion exchanger |
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