JP2017127812A - Sheet, and filter using the same - Google Patents
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Abstract
Description
本発明は、空気中のガス状汚染物質を吸着除去するフィルタに関するものである。更に詳しくは、アセトアルデヒド、ホルムアルデヒドなどの低級脂肪族アルデヒドに対して高い吸着性を有し、吸着容量の経時的な低下の少ないシートおよびそれを用いたフィルタに関するものである。 The present invention relates to a filter for adsorbing and removing gaseous pollutants in air. More specifically, the present invention relates to a sheet having high adsorptivity to lower aliphatic aldehydes such as acetaldehyde and formaldehyde, and having a small decrease in adsorption capacity with time, and a filter using the same.
室内や車内などの生活空間には、悪臭や有害ガスなどの様々なガス状汚染物質が存在しており、生活環境の向上に伴い、これらガス状汚染物質を除去し、快適な生活環境を維持することに多くの関心が持たれている。このような状況下、活性炭などの多孔質体は物理吸着能を持ち、生活空間に存在するガス状汚染物質の除去に広く使用されている。しかし、アセトアルデヒド、ホルムアルデヒドなどの低級脂肪族アルデヒドは沸点が低く、多孔質体の低級脂肪族アルデヒドに対する吸着容量は著しく低い。 Various gaseous pollutants such as bad odors and harmful gases exist in living spaces such as indoors and cars. With the improvement of the living environment, these gaseous pollutants are removed to maintain a comfortable living environment. There is a lot of interest in doing. Under such circumstances, porous bodies such as activated carbon have physical adsorption ability and are widely used to remove gaseous pollutants present in living spaces. However, lower aliphatic aldehydes such as acetaldehyde and formaldehyde have a low boiling point, and the adsorption capacity of the porous material for lower aliphatic aldehyde is extremely low.
これを解消すべく、化学吸着を利用して低級脂肪族アルデヒド吸着容量を向上した吸着剤の検討が進められている。アルデヒド基はアミノ基との反応性が高いことから、アミン類が低級脂肪族アルデヒドの化学吸着に有効であり、添着薬剤として種々のアミン類を多孔質体に添着することが試みられてきた。 In order to solve this problem, studies have been conducted on adsorbents that have improved the lower aliphatic aldehyde adsorption capacity by using chemical adsorption. Since aldehyde groups are highly reactive with amino groups, amines are effective for chemisorption of lower aliphatic aldehydes, and attempts have been made to attach various amines to porous materials as an attachment agent.
多孔質体に添着薬剤としてアニリン、塩酸ヒドロキシルアミン、硫酸ヒドロキシルアミン、又はパラ−トルイジン等を添着した吸着剤が提案されている（例えば、特許文献１〜３参照）。ここで、アミン類を多孔質体に添着した場合、長期間保管すると添着されたアミン類が空気中の酸素により酸化されて、低級脂肪族アルデヒド吸着容量が経時的に低下する問題がある。そこで、アミン類の中でアミノベンゼンスルホン酸は比較的酸化され難いことから、多孔質体にアミノベンゼンスルホン酸を添着した吸着剤が提案されている（例えば、特許文献４、５参照）。しかし、アミノベンゼンスルホン酸は水やアルコールなどの溶媒に対して難溶性であり、極低濃度の添着溶液しか調製できない。その結果、添着量の大きい吸着剤を得ることが難しいという問題がある。そこで、これを改善する方法として、アミノベンゼンスルホン酸をアンモニウム塩とし水溶化して多孔質体に添着した吸着剤やその製造方法が提案されている（例えば、特許文献６〜１３参照）。 Adsorbents in which aniline, hydroxylamine hydrochloride, hydroxylamine sulfate, para-toluidine, or the like is attached to a porous material as an attachment agent have been proposed (see, for example, Patent Documents 1 to 3). Here, when the amines are attached to the porous body, the stored amines are oxidized by oxygen in the air when stored for a long period of time, and there is a problem that the lower aliphatic aldehyde adsorption capacity decreases with time. Therefore, among amines, aminobenzenesulfonic acid is relatively difficult to oxidize, and therefore, an adsorbent in which aminobenzenesulfonic acid is attached to a porous body has been proposed (see, for example, Patent Documents 4 and 5). However, aminobenzene sulfonic acid is hardly soluble in solvents such as water and alcohol, and only an extremely low concentration of an addition solution can be prepared. As a result, there is a problem that it is difficult to obtain an adsorbent with a large amount of adhesion. Therefore, as a method for improving this, an adsorbent in which aminobenzenesulfonic acid is converted into an ammonium salt and water-solubilized and attached to a porous body and a method for producing the same have been proposed (for example, see Patent Documents 6 to 13).
上記で提案された多孔質体にアミノベンゼンスルホン酸アンモニウムを添着した吸着剤に関する技術を空気中のガス状汚染物質を吸着除去するシートやフィルタに利用しても、長期間保管したときの低級脂肪族アルデヒド吸着容量の低下の抑制はまだ不十分であり、さらに経時低下が小さなシートおよびそれを用いたフィルタが求められている。 Even if the technology related to the adsorbent in which ammonium aminobenzene sulfonate is impregnated to the porous material proposed above is applied to a sheet or filter for adsorbing and removing gaseous pollutants in the air, the low fat when stored for a long time The suppression of the decrease in the group aldehyde adsorption capacity is still insufficient, and there is a demand for a sheet with a small decrease over time and a filter using the sheet.
そこで、本発明は、上記課題を解決するためになされたものであり、その目的は、低級脂肪族アルデヒドに対して高い吸着性能を有し、吸着容量の経時的な低下の少ないシートおよびそれを用いたフィルタを提供することにある。 Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a sheet having a high adsorption performance with respect to a lower aliphatic aldehyde and having a small decrease in adsorption capacity over time. It is to provide a used filter.
本発明者らは上記課題を解決するため、鋭意研究した結果、トロメタミンとリン酸とを併用してフィルタに添着することにより、吸着容量の経時的な低下を抑制することができ、長期間保管した場合でも十分な低級脂肪族アルデヒド吸着性能を維持できることを見出し、遂に本発明を完成するに至った。即ち本発明は以下の通りである。
（１）多孔質体を含有した有機繊維材料からなり、かつ、目付けが３０ｇ／ｍ２以上であるシート基材１００重量部に対して、両面合わせて５．０〜５０重量部のトロメタミンおよび１．０〜１５重量部のリン酸が添着されていることを特徴とするシート。なお、両面合わせてとは、両面に添着されている場合だけでなく、片面のみに添着されている場合も含む。
（２）前記多孔質体は活性炭であることを特徴とする（１）に記載のシート
（３）（１）または（２）に記載のシートを備えたことを特徴とするフィルタ。
（４）ハニカム形状を有することを特徴とする（３）に記載のフィルタ。
As a result of diligent research to solve the above problems, the inventors of the present invention can suppress a decrease in adsorption capacity over time by using tromethamine and phosphoric acid in combination and attaching them to a filter, and store them for a long time. In this case, it was found that sufficient lower aliphatic aldehyde adsorption performance can be maintained, and the present invention has finally been completed. That is, the present invention is as follows.
(1) 5.0 to 50 parts by weight of tromethamine and 1 on both sides with respect to 100 parts by weight of a sheet base material made of an organic fiber material containing a porous body and having a basis weight of 30 g / m 2 or more A sheet to which 0 to 15 parts by weight of phosphoric acid is attached. Note that “both sides are aligned” includes not only the case of being attached to both sides but also the case of being attached to only one side.
(2) The filter comprising the sheet according to (1) or (2), wherein the porous body is activated carbon.
(4) The filter according to (3), which has a honeycomb shape.
本発明によると、低級脂肪族アルデヒドに対して高い吸着性能を有し、吸着容量の経時的な低下の少ないシートおよびそれを用いたフィルタを提供することができる。 According to the present invention, it is possible to provide a sheet having a high adsorption performance with respect to a lower aliphatic aldehyde and having a small decrease in adsorption capacity over time, and a filter using the sheet.
以下、本発明の実施形態について詳細に説明する。本実施形態のシートは、多孔質体を含有した有機繊維材料からなり、かつ、目付が３０ｇ／ｍ２以上であるシート基材１００重量部に対して、両面合わせて５．０〜５０重量部のトロメタミンおよび１．０〜１５重量部のリン酸が添着されている。なお、両面合わせてとは、シート基材の両面に添着されている場合だけでなく、シート基材の片面のみに添着されている場合も含む。また、本実施形態のフィルタは、本実施形態のシートを用いる。 Hereinafter, embodiments of the present invention will be described in detail. The sheet of this embodiment is made of an organic fiber material containing a porous body, and is 5.0 to 50 parts by weight in total on both sides with respect to 100 parts by weight of a sheet base material having a basis weight of 30 g / m 2 or more. Tromethamine and 1.0 to 15 parts by weight of phosphoric acid are impregnated. The term “both sides combined” includes not only the case of being attached to both sides of the sheet base material but also the case of being attached to only one side of the sheet base material. The filter of this embodiment uses the sheet of this embodiment.
本実施形態のシートおよびフィルタは、トロメタミンとリン酸とを併用して低級脂肪族アルデヒド除去剤として使用している。このことにより、吸着容量の経時的な低下を抑制することができ、長期間保管した場合でも十分な低級脂肪族アルデヒド吸着性能を維持できる。 In the sheet and filter of this embodiment, tromethamine and phosphoric acid are used in combination as a lower aliphatic aldehyde remover. As a result, a decrease in adsorption capacity with time can be suppressed, and sufficient lower aliphatic aldehyde adsorption performance can be maintained even when stored for a long period of time.
本実施形態のシートは、多孔質体を含有した有機繊維材料からなるシート基材を用いて形成される。有機繊維材料としては、木材系パルプ、マニラ麻パルプ、ポリオレフィン系パルプ、アクリルパルプ、アラミドパルプ等のフィブリル化できる繊維が好ましい。レーヨンやポリエチレン、ポリエステル、ポリプロピレン、ポリビニルアルコール等の短繊維を併用してもよい。多孔質体としては、活性炭、シリカゲル、ゼオライト、セパオライト等の無機物の他、スチレン−ジビニルベンゼン架橋体に代表される有機系の多孔質体が使用可能である。特に、極めて大きな比表面積を持っているため、活性炭が好ましい。 The sheet of this embodiment is formed using a sheet base material made of an organic fiber material containing a porous body. As the organic fiber material, fibers that can be fibrillated such as wood pulp, manila hemp pulp, polyolefin pulp, acrylic pulp, and aramid pulp are preferable. Short fibers such as rayon, polyethylene, polyester, polypropylene, and polyvinyl alcohol may be used in combination. As the porous body, in addition to inorganic substances such as activated carbon, silica gel, zeolite, and sepalite, organic porous bodies typified by styrene-divinylbenzene crosslinked bodies can be used. In particular, activated carbon is preferable because it has a very large specific surface area.
多孔質体として活性炭を用いる場合、活性炭種は特に限定しない。例えば、黒鉛、鉱物系材料（褐炭、瀝青炭などの石炭系、石油または、石油ピッチなど）、植物系材料（木質、果実殻（ヤシ殻など）など）、高分子系材料（ポリアクリルニトリル、フェノール系材料、セルロース）などを原料とする活性炭が挙げられ、これらの原料を炭化、または不融化した後、賦活処理することによって得られる活性炭を使用することができる。 When activated carbon is used as the porous body, the activated carbon species is not particularly limited. For example, graphite, mineral materials (coal such as lignite and bituminous coal, petroleum or petroleum pitch, etc.), plant materials (wood, fruit shells (coconut shell, etc.)), polymer materials (polyacrylonitrile, phenol, etc.) Activated carbon using a raw material such as a system material or cellulose), and activated carbon obtained by carbonizing or infusibilizing these raw materials and then performing an activation treatment can be used.
本実施形態において、多孔質体として活性炭を用いる場合、活性炭作製時の炭化方法、不融化方法、賦活方法については、特に限定されず、従来公知の加工方法を用いることができる。例えば、賦活は、炭化、または不融化処理を施した炭素原料を水や二酸化炭素などの賦活ガス中で、５００〜１０００℃程度で熱処理するガス賦活法や炭化、または不融化処理を施した炭素原料をリン酸、塩化亜鉛、水酸化カリウムなどの賦活剤と混合し、３００〜８００℃程度で熱処理する化学賦活法などを用いることができる。 In this embodiment, when using activated carbon as a porous body, it does not specifically limit about the carbonization method at the time of activated carbon preparation, an infusibilization method, and an activation method, A conventionally well-known processing method can be used. For example, activation is performed by a gas activation method in which a carbon raw material subjected to carbonization or infusibilization treatment is heat-treated at about 500 to 1000 ° C. in an activation gas such as water or carbon dioxide, or carbon subjected to carbonization or infusibilization treatment. A chemical activation method in which the raw material is mixed with an activator such as phosphoric acid, zinc chloride, or potassium hydroxide and heat-treated at about 300 to 800 ° C. can be used.
本実施形態において、多孔質体のＢＥＴ比表面積は、６００〜１５００ｍ２／ｇであることが好ましく、より好ましくは８００〜１４００ｍ２／ｇである。多孔質体のＢＥＴ比表面積が６００ｍ２／ｇ未満であれば、吸着容量が小さく、結果として、十分な脱臭性能が発現できない。また、多孔質体のＢＥＴ比表面積が１５００ｍ２／ｇを越えると、有害ガス成分や臭気成分の吸着性能が低下する。 In this embodiment, it is preferable that the BET specific surface area of a porous body is 600-1500 m < 2 > / g, More preferably, it is 800-1400 m < 2 > / g. If the BET specific surface area of the porous body is less than 600 m 2 / g, the adsorption capacity is small, and as a result, sufficient deodorizing performance cannot be exhibited. Moreover, when the BET specific surface area of a porous body exceeds 1500 m < 2 > / g, the adsorption | suction performance of a noxious gas component and an odor component will fall.
本実施形態において、多孔質体が粒子状である場合、その平均粒子径は、０．２〜１００μｍであることが好ましく、より好ましくは０．４〜５０μｍ、さらに好ましくは０．５〜３０μｍである。粒径が０．２μｍ未満であれば、凝集固化が起こりやすく、水系ペーストへの再分散が困難である。また、１００μｍを越えるようなものでは、ペーストの分散安定性に問題があり、得られたコート層も低密度となりやすく、また外力による脱落が生じやすいとの問題がある。なお、多孔質体の平均粒子径とは重量中位径を指す。 In the present embodiment, when the porous body is particulate, the average particle diameter is preferably 0.2 to 100 μm, more preferably 0.4 to 50 μm, still more preferably 0.5 to 30 μm. is there. If the particle size is less than 0.2 μm, aggregation and solidification are likely to occur, and redispersion in an aqueous paste is difficult. In addition, when the thickness exceeds 100 μm, there is a problem in the dispersion stability of the paste, and the obtained coating layer tends to have a low density and is likely to fall off due to an external force. In addition, the average particle diameter of a porous body refers to a weight median diameter.
本実施形態において、多孔質体として複数の種類を用いてもよく、例えば、活性炭と、必要に応じて、ゼオライト、シリカゲル、アルミナ等とを併用してもよい。 In the present embodiment, a plurality of types may be used as the porous body. For example, activated carbon may be used in combination with zeolite, silica gel, alumina, or the like, if necessary.
本実施形態において、多孔質体を含有した有機繊維材料からなるシート基材の作製方法は（１）有機繊維材料と多孔質体とを混抄し、湿式抄紙する方法や（２）有機繊維のみを通常の湿式抄紙法にて抄紙した後、多孔質体をコーター法、グラビア法等の公知のコーティング方法にて担持加工する方法等が挙げられる。 In the present embodiment, a method for producing a sheet base material made of an organic fiber material containing a porous body includes (1) a method of mixing an organic fiber material and a porous body and performing wet papermaking, and (2) only an organic fiber. Examples thereof include a method of carrying out paper processing by a known coating method such as a coater method or a gravure method after paper making by a normal wet paper making method.
本実施形態において、多孔質体を含有した有機繊維材料からなるシート基材の厚みは、０．１〜０．５ｍｍ程度であることが好ましい。シート基材の厚みが０．１ｍｍ未満であれば、ハニカム形状への折り込み加工の際の強度が不十分でとなり、０．５ｍｍを越えると、ガス吸着シート全体の厚みが大きくなり、ハニカム形状のフィルタに加工した際に圧力損失が大きくなるという問題がある。 In this embodiment, it is preferable that the thickness of the sheet | seat base material which consists of organic fiber material containing a porous body is about 0.1-0.5 mm. If the thickness of the sheet base material is less than 0.1 mm, the strength at the time of folding into the honeycomb shape becomes insufficient, and if it exceeds 0.5 mm, the thickness of the entire gas adsorption sheet increases, There is a problem that pressure loss increases when the filter is processed.
本実施形態において、多孔質体を含有した有機繊維材料からなるシート基材の目付量は、３０〜１５０ｇ／ｍ２程度であることが好ましい。シート基材の目付量が３０ｇ／ｍ２未満であれば、オゾン除去性能が発揮されにくく、１５０ｇ／ｍ２を越えると、ガス吸着シート全体の厚みが大きくなり、ハニカム形状のフィルタに加工した際に圧力損失が大きくなるという問題がある。 In this embodiment, it is preferable that the fabric weight of the sheet | seat base material which consists of organic fiber material containing a porous body is about 30-150 g / m < 2 >. When the basis weight of the sheet base material is less than 30 g / m 2 , the ozone removal performance is difficult to be exhibited, and when it exceeds 150 g / m 2 , the thickness of the entire gas adsorbing sheet increases, and when processed into a honeycomb-shaped filter However, there is a problem that the pressure loss becomes large.
本実施形態において、多孔質体を含有した有機繊維材料からなるシート基材の多孔質体含有比率は、３０〜８０重量％であることが好ましい。シート基材の多孔質体含有比率が３０重量％未満であれば、十分な低級脂肪族アルデヒド除去性能が発現せず、８０重量％を越えるようなものでは、シート基材の有機繊維比率が低いため、抄紙生産性が悪く、またシート基材の強度も低くなるという問題がある。 In this embodiment, it is preferable that the porous body content rate of the sheet | seat base material which consists of organic fiber material containing a porous body is 30 to 80 weight%. If the porous material content ratio of the sheet base material is less than 30% by weight, sufficient lower aliphatic aldehyde removal performance is not exhibited, and if it exceeds 80% by weight, the organic fiber ratio of the sheet base material is low. For this reason, there is a problem that the papermaking productivity is poor and the strength of the sheet base material is lowered.
本実施形態において、シートのトロメタミン担持量は、多孔質体を含有した有機繊維材料からなるシート基材１００重量部に対して、両面合わせて５．０〜５０重量部であることが好ましい。トロメタミン担持量が５．０重量部未満であれば、低級脂肪族アルデヒドの除去性能が十分に発揮されにくく、５０重量部を越えれば、多孔質体の細孔がトロメタミンにより閉塞し、物理吸着能が発揮できず、吸着性能が低下する問題がある。なお、両面合わせてとは、シート基材の両面に添着されている場合だけでなく、シート基材の片面のみに添着されている場合も含む。 In the present embodiment, the amount of tromethamine supported on the sheet is preferably 5.0 to 50 parts by weight on both sides with respect to 100 parts by weight of the sheet base material made of an organic fiber material containing a porous body. When the amount of tromethamine supported is less than 5.0 parts by weight, the removal performance of the lower aliphatic aldehyde is hardly exerted, and when it exceeds 50 parts by weight, the pores of the porous body are blocked by tromethamine, and the physical adsorption capacity Cannot be exhibited, and there is a problem that the adsorption performance decreases. The term “both sides combined” includes not only the case of being attached to both sides of the sheet base material but also the case of being attached to only one side of the sheet base material.
本実施形態において、シートのリン酸担持量は、多孔質体を含有した有機繊維材料からなるシート基材１００重量部に対して、両面合わせて１．０〜１５重量部であることが好ましい。リン酸担持量が１．０重量部以下であれば、トロメタミンの酸化抑制効果が小さく、低級脂肪族アルデヒドの除去性能が発揮されにくく、１５重量部を越えると、多孔質体の細孔部がリン酸により閉塞し、物理吸着能が発揮できず、吸着性能が低下する問題がある。なお、両面合わせてとは、シート基材の両面に添着されている場合だけでなく、シート基材の片面のみに添着されている場合も含む。 In this embodiment, it is preferable that the phosphoric acid carrying amount of a sheet | seat is 1.0-15 weight part in total of both surfaces with respect to 100 weight part of sheet | seat base materials consisting of the organic fiber material containing the porous body. If the amount of phosphoric acid supported is 1.0 part by weight or less, the effect of suppressing the oxidation of tromethamine is small, and the removal performance of the lower aliphatic aldehyde is difficult to be exhibited. There is a problem that it is clogged with phosphoric acid and the physical adsorption ability cannot be exhibited and the adsorption performance is lowered. The term “both sides combined” includes not only the case of being attached to both sides of the sheet base material but also the case of being attached to only one side of the sheet base material.
本実施形態において、シートの脱臭性能を更に向上させるために、酸、塩基の化学吸着剤を担持し、併用することもできる。具体的には除去対象がアンモニアやアミン類に対しては酸性化合物であり、カルボン酸類、硫化水素、メルカプタン類に対しては塩基性化合物である。かかる薬剤は単機能もしくは同一化合物中に二以上の異なる置換基を有していてもよいし、互いに阻害が生じないならば二種類以上を併用することも好ましい。 In this embodiment, in order to further improve the deodorizing performance of the sheet, an acid or base chemical adsorbent may be supported and used in combination. Specifically, the removal target is an acidic compound for ammonia and amines, and a basic compound for carboxylic acids, hydrogen sulfide, and mercaptans. Such a drug may have a single function or two or more different substituents in the same compound, and it is also preferable to use two or more kinds in combination as long as they do not inhibit each other.
本実施形態において、シートに難燃性を付与するために、必要に応じて水酸化アルミニウム、メラミン等の非水溶性難燃剤や含窒素リン系難燃剤等を添加してもよい。 In this embodiment, in order to impart flame retardancy to the sheet, a water-insoluble flame retardant such as aluminum hydroxide or melamine, a nitrogen-containing phosphorus flame retardant, or the like may be added as necessary.
ここで、シートへの薬剤担持方法としては、（１）シートを薬剤溶液に浸漬することにより担持する方法、（２）シートをハニカム加工した後に、薬剤溶液に浸漬することにより担持する方法等を用いることができる。 Here, as a method for supporting the drug on the sheet, (1) a method of supporting the sheet by immersing it in the drug solution, (2) a method of supporting the sheet by immersing it in the drug solution after honeycomb processing of the sheet, etc. Can be used.
本実施形態のフィルタは、上記で説明した本実施形態のシートを用いる。本実施形態のフィルタは、本実施形態のシートに他の材料を組み合わせてもよい。例えば、本実施形態のシートと除塵フィルタとを積層かつ接着し、下記と同様の方法でハニカム形状に形成してもよい。このような本実施形態のフィルタは、例えば、自動車、空気清浄機やエアコン、コピー機、プリンター、多機能ＯＡ機器やトイレ脱臭機などに用いることができる。 The filter of this embodiment uses the sheet of this embodiment described above. The filter of this embodiment may combine other materials with the sheet of this embodiment. For example, the sheet of this embodiment and the dust filter may be laminated and bonded, and formed into a honeycomb shape by the same method as described below. Such a filter of this embodiment can be used for an automobile, an air cleaner, an air conditioner, a copy machine, a printer, a multifunction OA device, a toilet deodorizer, and the like.
本実施形態では、シートをハニカム形状に加工してハニカム形状を有するフィルタとしている。気体の流通方向に平行した平面構造が得られさえすれば、ハニカムの断面が六画形状のものの他、四角、正弦波形、ロール形のもの等、中空多角柱、中空円柱等の中空柱体が連続して形成された形態など必要とされる形状であればどのような形状であってもよい。例えば、シートを正弦波形のハニカム形状のフィルタにするには、まずシートを賦形ロールに通して波形に賦形し、波形のシートの片面または両面に平らなシートを接合する。これを積層化して正弦波形のハニカム形状のフィルタとする。 In this embodiment, the sheet is processed into a honeycomb shape to form a filter having a honeycomb shape. As long as a plane structure parallel to the gas flow direction can be obtained, a hollow column body such as a hollow polygonal column, a hollow cylinder, etc., in addition to a hexagonal cross section, a square, a sinusoidal waveform, a roll shape, etc. Any shape may be used as long as it is a required shape such as a continuously formed shape. For example, to form a sinusoidal honeycomb-shaped filter, the sheet is first formed into a corrugated shape through a shaping roll, and a flat sheet is bonded to one or both sides of the corrugated sheet. This is laminated to form a sinusoidal honeycomb filter.
上記のような正弦波形のハニカム形状のフィルタを成形する場合には、波形のシートの頂点に接着剤を付けて、平らなシートと接合する必要がある。その場合の接着剤種については特に限定しないが、アクリル系、アクリル−スチレン系、酢酸ビニル系、エチレン−酢酸ビニル系、エポキシ系が好ましく、より好ましくは耐水性の高く、ハロゲン化物を含有しないアクリル系エマルジョンを用いることが好ましい。 In the case of forming a sinusoidal honeycomb-shaped filter as described above, it is necessary to attach an adhesive to the top of the corrugated sheet and bond it to a flat sheet. In this case, the type of adhesive is not particularly limited, but acrylic, acryl-styrene, vinyl acetate, ethylene-vinyl acetate, and epoxy are preferred, and acrylic having no water resistance and more preferably water-resistant is preferable. It is preferable to use a system emulsion.
以下、実施例によって本発明の作用効果をより具体的に示す。まず、後段の各実施例および各比較例にて作成したフィルタの性能の測定方法について説明する。 Hereinafter, the effects of the present invention will be described more specifically by way of examples. First, a description will be given of a method for measuring the performance of the filters prepared in the following examples and comparative examples.
［ホルムアルデヒド除去性能]
フィルタを２６φ、高さ３０ｍｍにカットしたサンプルを、内径２６ｍｍのガラスカラム内にセットし、ホルムアルデヒド５．０ｐｐｍを含む温度２５℃、相対湿度５０％の空気を流速１．５ｍ／ｓで流通させた。ガラスカラム内の温度は２５℃一定とした。サンプルのホルムアルデヒド除去の初期性能評価のために、流通開始から２分後のガラスカラムの入口および出口のホルムアルデヒド濃度をホルムアルデヒド濃度測定器（ホルムアルデメーターｈｔｖ）にて測定し、ガラスカラムの入口および出口の濃度変化からホルムアルデヒド除去率［％］を算出した。
[Formaldehyde removal performance]
A sample with a filter cut to 26φ and a height of 30 mm was set in a glass column with an inner diameter of 26 mm, and air containing 5.0 ppm formaldehyde at a temperature of 25 ° C. and a relative humidity of 50% was circulated at a flow rate of 1.5 m / s. . The temperature in the glass column was kept constant at 25 ° C. In order to evaluate the initial performance of removing formaldehyde from the sample, the formaldehyde concentration at the inlet and outlet of the glass column after 2 minutes from the start of distribution was measured with a formaldehyde concentration meter (formal meter htv), and the inlet and outlet of the glass column were measured. The formaldehyde removal rate [%] was calculated from the concentration change.
［ホルムアルデヒド吸着容量保持率]
フィルタを（１）温度２５℃、相対湿度５０％、（２）温度６０℃、相対湿度９５％の２条件で恒温恒湿機内に５０時間静置保管した。その後、２６φ、高さ３０ｍｍにカットしたフィルタのサンプルを、それぞれ、内径２６ｍｍのガラスカラム内にセットし、ホルムアルデヒド５．０ｐｐｍを含む温度２５℃、相対湿度５０％の空気を流速１．５ｍ／ｓを流通させた。上記と同様にガラスカラムの入口および出口のホルムアルデヒド濃度を、測定開始からホルムアルデヒド除去率が０％に到達するまで連続的に測定し、ホルムアルデヒド供給量とホルムアルデヒド除去率とからホルムアルデヒド除去量を算出した。そして、ホルムアルデヒド除去量と時間との曲線を積分することにより、ホルムアルデヒド除去量［ｍｇ］を算出し、このホルムアルデヒド除去量［ｍｇ］をサンプル体積で割ることにより、ホルムアルデヒド除去率０％到達時のサンプル当りのホルムアルデヒド吸着容量［ｍｇ／ｃｃ］を算出した。そして、下記の式にてホルムアルデヒド吸着容量保持率［％］を算出した。
[Formaldehyde adsorption capacity retention]
The filter was left to stand for 50 hours in a thermo-hygrostat under the following conditions: (1) temperature 25 ° C., relative humidity 50%, (2) temperature 60 ° C., relative humidity 95%. After that, each filter sample cut to 26φ and 30 mm in height was set in a glass column having an inner diameter of 26 mm, and air containing 5.0 ppm formaldehyde at a temperature of 25 ° C. and a relative humidity of 50% was flowed at a flow rate of 1.5 m / s. Circulated. Similarly to the above, the formaldehyde concentration at the inlet and outlet of the glass column was continuously measured from the start of measurement until the formaldehyde removal rate reached 0%, and the formaldehyde removal amount was calculated from the formaldehyde supply amount and the formaldehyde removal rate. Then, the formaldehyde removal amount [mg] is calculated by integrating the curve of the formaldehyde removal amount and time, and the formaldehyde removal rate reaches 0% by dividing this formaldehyde removal amount [mg] by the sample volume. The formaldehyde adsorption capacity [mg / cc] per unit was calculated. And formaldehyde adsorption capacity retention [%] was computed by the following formula.
ホルムアルデヒド吸着容量保持率［％］＝｛ホルムアルデヒド吸着容量（温度６０℃、相対湿度９５％保管品）［ｍｇ／ｃｃ］÷ホルムアルデヒド吸着容量（温度２５℃、相対湿度５０％保管品）［ｍｇ／ｃｃ］｝×１００ Formaldehyde adsorption capacity retention [%] = {formaldehyde adsorption capacity (temperature 60 ° C., relative humidity 95% storage product) [mg / cc] ÷ formaldehyde adsorption capacity (temperature 25 ° C., relative humidity 50% storage product) [mg / cc ] × 100
次に、各実施例および各比較例のシートおよびフィルタに用いた材料、並びにシートおよびフィルタの製造方法について説明する。なお、記載の、材料や数値、製造方法、製造装置は、あくまで以下の各実施例および各比較例でのものであり、本発明は記載されたものに限定されない。 Next, the material used for the sheet | seat and filter of each Example and each comparative example, and the manufacturing method of a sheet | seat and a filter are demonstrated. Note that the materials, numerical values, manufacturing method, and manufacturing apparatus described are only those in the following examples and comparative examples, and the present invention is not limited to those described.
＜実施例１＞
活性炭：４０部、マニラ麻：１３．５部、木材系パルプ：１３．５部、ポリエステル：２０部、ポリビニルアルコール：８．０部を混合して、スラリー状とし、これをヤンキー型湿式抄紙機で抄紙（目付量：４５ｇ／ｍ２、厚み：０．２０ｍｍ）を製造した。なお、活性炭は木質系活性炭を用い、そのＢＥＴ比表面積：１２００ｍ２／ｇであった。
<Example 1>
Activated charcoal: 40 parts, Manila hemp: 13.5 parts, Wood pulp: 13.5 parts, Polyester: 20 parts, Polyvinyl alcohol: 8.0 parts are mixed to form a slurry, which is treated with a Yankee type wet paper machine. Papermaking (weight per unit area: 45 g / m 2 , thickness: 0.20 mm) was produced. In addition, the activated carbon used the wood type activated carbon, and the BET specific surface area was 1200 m < 2 > / g.
得られた抄紙をシート基材として用い、シート基材：１００重量部に対し、トロメタミン：３０重量部、リン酸：６重量部をシート基材の両面にコートし、目付：６０ｇ／ｍ２、厚み：０．２０ｍｍのガス吸着層担持シートを製造した。なお、本実施例および以下の実施例では両面にコートしているが、少なくとも片面にコートすると、同じ効果が得られる。 Using the resulting papermaking as a sheet base material, the sheet base material: 100 parts by weight, tromethamine: 30 parts by weight, phosphoric acid: 6 parts by weight are coated on both sides of the sheet base material, the basis weight: 60 g / m 2 , A gas adsorption layer carrying sheet having a thickness of 0.20 mm was produced. In this example and the following examples, both sides are coated, but if at least one side is coated, the same effect can be obtained.
続いて、得られたガス吸着層担持シートをコルゲート加工機にて、山高２．５ｍｍ 、山間隔４．１ｍｍの片段ボールシートに成形した。この片段ボールシートを４０段重ね、切断加工して、１００ｍｍ×１００ｍｍ、層長３０ｍｍのハニカム形状のフィルタを得た。 Subsequently, the obtained gas adsorbing layer carrying sheet was formed into a single cardboard sheet having a peak height of 2.5 mm and a peak interval of 4.1 mm with a corrugating machine. The single-stage cardboard sheets were stacked 40 times and cut to obtain a honeycomb-shaped filter having a size of 100 mm × 100 mm and a layer length of 30 mm.
＜実施例２＞
活性炭：４０部、マニラ麻：１３．５部、木材系パルプ：１３．５部、ポリエステル：２０部、ポリビニルアルコール：８．０部を混合して、スラリー状とし、これをヤンキー型湿式抄紙機で抄紙（目付量：６０ｇ／ｍ２、厚み：０．２４ｍｍ）を製造した。なお、活性炭は木質系活性炭を用い、そのＢＥＴ比表面積：１２００ｍ２／ｇであった。
<Example 2>
Activated charcoal: 40 parts, Manila hemp: 13.5 parts, Wood pulp: 13.5 parts, Polyester: 20 parts, Polyvinyl alcohol: 8.0 parts are mixed to form a slurry, which is treated with a Yankee type wet paper machine. Papermaking (weight per unit area: 60 g / m 2 , thickness: 0.24 mm) was produced. In addition, the activated carbon used the wood type activated carbon, and the BET specific surface area was 1200 m < 2 > / g.
得られた抄紙をシート基材として用い、シート基材：１００重量部に対し、トロメタミン：２５重量部、リン酸：５重量部をシート基材の両面にコートし、目付：７８ｇ／ｍ２、厚み：０．２４ｍｍのガス吸着層担持シートを製造した。続いて、得られたガス吸着層担持シートをコルゲート加工機にて、山高２．５ｍｍ 、山間隔４．１ｍｍの片段ボールシートに成形した。この片段ボールシートを４０段重ね、切断加工して、１００ｍｍ×１００ｍｍ、層長３０ｍｍのハニカム形状のフィルタを得た。 Using the resulting papermaking as a sheet substrate, tromethamine: 25 parts by weight and phosphoric acid: 5 parts by weight are coated on both sides of the sheet substrate with respect to 100 parts by weight of the sheet substrate, and the basis weight is 78 g / m 2 . A gas adsorption layer carrying sheet having a thickness of 0.24 mm was produced. Subsequently, the obtained gas adsorbing layer carrying sheet was formed into a single cardboard sheet having a peak height of 2.5 mm and a peak interval of 4.1 mm with a corrugating machine. The single-stage cardboard sheets were stacked 40 times and cut to obtain a honeycomb-shaped filter having a size of 100 mm × 100 mm and a layer length of 30 mm.
＜実施例３＞
活性炭：４０部、マニラ麻：１３．５部、木材系パルプ：１３．５部、ポリエステル：２０部、ポリビニルアルコール：８．０部を混合して、スラリー状とし、これをヤンキー型湿式抄紙機で抄紙（目付量：１００ｇ／ｍ２、厚み：０．３６ｍｍ）を製造した。
<Example 3>
Activated charcoal: 40 parts, Manila hemp: 13.5 parts, Wood pulp: 13.5 parts, Polyester: 20 parts, Polyvinyl alcohol: 8.0 parts are mixed to form a slurry, which is treated with a Yankee type wet paper machine. Papermaking (weight per unit area: 100 g / m 2 , thickness: 0.36 mm) was produced.
得られた抄紙をシート基材として用い、シート基材：１００重量部に対し、トロメタミン：１５重量部、リン酸：３重量部をシート基材の両面にコートし、目付：１１８ｇ／ｍ２、厚み：０．３６ｍｍのガス吸着層担持シートを製造した。続いて、得られたガス吸着層担持シートをコルゲート加工機にて、山高２．５ｍｍ 、山間隔４．１ｍｍの片段ボールシートに成形した。この片段ボールシートを４０段重ね、切断加工して、１００ｍｍ×１００ｍｍ、層長３０ｍｍのハニカム形状のフィルタを得た。 Using the obtained papermaking as a sheet base material, tromethamine: 15 parts by weight and phosphoric acid: 3 parts by weight are coated on both sides of the sheet base material with respect to 100 parts by weight of the sheet base material, basis weight: 118 g / m 2 , A gas adsorption layer carrying sheet having a thickness of 0.36 mm was produced. Subsequently, the obtained gas adsorbing layer carrying sheet was formed into a single cardboard sheet having a peak height of 2.5 mm and a peak interval of 4.1 mm with a corrugating machine. The single-stage cardboard sheets were stacked 40 times and cut to obtain a honeycomb-shaped filter having a size of 100 mm × 100 mm and a layer length of 30 mm.
＜実施例４＞
実施例２のシート基材と同様に作成したシート基材：１００重量部に対し、トロメタミン：１５重量部、リン酸：５．０重量部をシート基材の両面にコートし、目付：７２ｇ／ｍ２、厚み：０．２４ｍｍのガス吸着層担持シートを製造した。続いて、得られたガス吸着層担持シートをコルゲート加工機にて、山高２．５ｍｍ 、山間隔４．１ｍｍの片段ボールシートに成形した。この片段ボールシートを４０段重ね、切断加工して、１００ｍｍ×１００ｍｍ、層長３０ｍｍのハニカム形状のフィルタを得た。
<Example 4>
The sheet base material prepared in the same manner as the sheet base material of Example 2 was coated on both sides of the sheet base material with 15 parts by weight of tromethamine and 5.0 parts by weight of phosphoric acid with respect to 100 parts by weight. A gas adsorbing layer carrying sheet with m 2 and thickness: 0.24 mm was produced. Subsequently, the obtained gas adsorbing layer carrying sheet was formed into a single cardboard sheet having a peak height of 2.5 mm and a peak interval of 4.1 mm with a corrugating machine. The single-stage cardboard sheets were stacked 40 times and cut to obtain a honeycomb-shaped filter having a size of 100 mm × 100 mm and a layer length of 30 mm.
＜実施例５＞
実施例２と同様に作成したシート基材：１００重量部に対し、トロメタミン：３５重量部、リン酸：５．０重量部をシート基材の両面にコートし、目付：８４ｇ／ｍ２、厚み：０．２４ｍｍのガス吸着層担持シートを製造した。続いて、得られたガス吸着層担持シートをコルゲート加工機にて、山高２．５ｍｍ 、山間隔４．１ｍｍの片段ボールシートに成形した。この片段ボールシートを４０段重ね、切断加工して、１００ｍｍ×１００ｍｍ、層長３０ｍｍのハニカム形状のフィルタを得た。
<Example 5>
Sheet base material prepared in the same manner as in Example 2: 100 parts by weight of tromethamine: 35 parts by weight, phosphoric acid: 5.0 parts by weight are coated on both sides of the sheet base material, basis weight: 84 g / m 2 , thickness : A 0.24 mm gas adsorption layer carrying sheet was produced. Subsequently, the obtained gas adsorbing layer carrying sheet was formed into a single cardboard sheet having a peak height of 2.5 mm and a peak interval of 4.1 mm with a corrugating machine. The single-stage cardboard sheets were stacked 40 times and cut to obtain a honeycomb-shaped filter having a size of 100 mm × 100 mm and a layer length of 30 mm.
＜実施例６＞
実施例２と同様に作成したシート基材：１００重量部に対し、トロメタミン：２５重量部、リン酸：７．５重量部をシート基材の両面にコートし、目付：８０ｇ／ｍ２、厚み：０．２４ｍｍのガス吸着層担持シートを製造した。続いて、得られたガス吸着層担持シートをコルゲート加工機にて、山高２．５ｍｍ 、山間隔４．１ｍｍの片段ボールシートに成形した。この片段ボールシートを４０段重ね、切断加工して、１００ｍｍ×１００ｍｍ、層長３０ｍｍのハニカム形状のフィルタを得た。
<Example 6>
Sheet base material prepared in the same manner as in Example 2: 100 parts by weight of tromethamine: 25 parts by weight, phosphoric acid: 7.5 parts by weight are coated on both sides of the sheet base material, basis weight: 80 g / m 2 , thickness : A 0.24 mm gas adsorption layer carrying sheet was produced. Subsequently, the obtained gas adsorbing layer carrying sheet was formed into a single cardboard sheet having a peak height of 2.5 mm and a peak interval of 4.1 mm with a corrugating machine. The single-stage cardboard sheets were stacked 40 times and cut to obtain a honeycomb-shaped filter having a size of 100 mm × 100 mm and a layer length of 30 mm.
＜実施例７＞
実施例２と同様に作成したシート基材：１００重量部に対し、トロメタミン：２５重量部、リン酸：１０重量部をシート基材の両面にコートし、目付：８１ｇ／ｍ２、厚み：０．２４ｍｍのガス吸着層担持シートを製造した。続いて、得られたガス吸着層担持シートをコルゲート加工機にて、山高２．５ｍｍ 、山間隔４．１ｍｍの片段ボールシートに成形した。この片段ボールシートを４０段重ね、切断加工して、１００ｍｍ×１００ｍｍ、層長３０ｍｍのハニカム形状のフィルタを得た。
<Example 7>
Sheet base material prepared in the same manner as in Example 2: 100 parts by weight of tromethamine: 25 parts by weight, phosphoric acid: 10 parts by weight were coated on both sides of the sheet base material, basis weight: 81 g / m 2 , thickness: 0 A 24 mm gas adsorbing layer carrying sheet was produced. Subsequently, the obtained gas adsorbing layer carrying sheet was formed into a single cardboard sheet having a peak height of 2.5 mm and a peak interval of 4.1 mm with a corrugating machine. The single-stage cardboard sheets were stacked 40 times and cut to obtain a honeycomb-shaped filter having a size of 100 mm × 100 mm and a layer length of 30 mm.
＜比較例１＞
活性炭：４０部、マニラ麻：１３．５部、木材系パルプ：１３．５部、ポリエステル：２０部、ポリビニルアルコール：８．０部を混合して、スラリー状とし、これをヤンキー型湿式抄紙機で抄紙（目付量：２５ｇ／ｍ２、厚み：０．１０ｍｍ）を製造した。なお、活性炭は木質系活性炭を用い、そのＢＥＴ比表面積：１２００ｍ２／ｇであった。
<Comparative Example 1>
Activated charcoal: 40 parts, Manila hemp: 13.5 parts, Wood pulp: 13.5 parts, Polyester: 20 parts, Polyvinyl alcohol: 8.0 parts are mixed to form a slurry, which is treated with a Yankee type wet paper machine. Papermaking (weight per unit area: 25 g / m 2 , thickness: 0.10 mm) was produced. In addition, the activated carbon used the wood type activated carbon, and the BET specific surface area was 1200 m < 2 > / g.
得られた抄紙をシート基材として用い、シート基材：１００重量部に対し、トロメタミン：３０重量部、リン酸：６重量部をシート基材の両面にコートし、目付：３４ｇ／ｍ２、厚み：０．１０ｍｍのガス吸着層担持シートを製造した。続いて、得られたガス吸着層担持シートをコルゲート加工機にて、山高２．５ｍｍ 、山間隔４．１ｍｍの片段ボールシートに成形した。この片段ボールシートを４０段重ね、切断加工して、１００ｍｍ×１００ｍｍ、層長３０ｍｍのハニカム形状のフィルタを得た。 Using the resulting papermaking as a sheet substrate, tromethamine: 30 parts by weight, phosphoric acid: 6 parts by weight are coated on both sides of the sheet substrate with respect to 100 parts by weight of the sheet substrate, and the basis weight is 34 g / m 2 . A gas adsorption layer carrying sheet having a thickness of 0.10 mm was produced. Subsequently, the obtained gas adsorbing layer carrying sheet was formed into a single cardboard sheet having a peak height of 2.5 mm and a peak interval of 4.1 mm with a corrugating machine. The single-stage cardboard sheets were stacked 40 times and cut to obtain a honeycomb-shaped filter having a size of 100 mm × 100 mm and a layer length of 30 mm.
＜比較例２＞
実施例２と同様に作成したシート基材：１００重量部に対し、トロメタミン：３．０重量部、リン酸：５．０重量部をシート基材の両面にコートし、目付：６５ｇ／ｍ２、厚み：０．２４ｍｍのガス吸着層担持シートを製造した。続いて、得られたガス吸着層担持シートをコルゲート加工機にて、山高２．５ｍｍ 、山間隔４．１ｍｍの片段ボールシートに成形した。この片段ボールシートを４０段重ね、切断加工して、１００ｍｍ×１００ｍｍ、層長３０ｍｍのハニカム形状のフィルタを得た。
<Comparative example 2>
Sheet base material prepared in the same manner as in Example 2: 100 parts by weight of tromethamine: 3.0 parts by weight, phosphoric acid: 5.0 parts by weight were coated on both sides of the sheet base material, and the basis weight was 65 g / m 2. A gas adsorption layer carrying sheet having a thickness of 0.24 mm was produced. Subsequently, the obtained gas adsorbing layer carrying sheet was formed into a single cardboard sheet having a peak height of 2.5 mm and a peak interval of 4.1 mm with a corrugating machine. The single-stage cardboard sheets were stacked 40 times and cut to obtain a honeycomb-shaped filter having a size of 100 mm × 100 mm and a layer length of 30 mm.
＜比較例３＞
実施例２と同様に作成したシート基材：１００重量部に対し、トロメタミン：２５重量部、リン酸：０．５重量部をシート基材の両面にコートし、目付：７５ｇ／ｍ２、厚み：０．２４ｍｍのガス吸着層担持シートを製造した。続いて、得られたガス吸着層担持シートをコルゲート加工機にて、山高２．５ｍｍ 、山間隔４．１ｍｍの片段ボールシートに成形した。この片段ボールシートを４０段重ね、切断加工して、１００ｍｍ×１００ｍｍ、層長３０ｍｍのハニカム形状のフィルタを得た。
<Comparative Example 3>
Sheet base material prepared in the same manner as in Example 2: 100 parts by weight of tromethamine: 25 parts by weight, phosphoric acid: 0.5 part by weight are coated on both sides of the sheet base material, basis weight: 75 g / m 2 , thickness : A 0.24 mm gas adsorption layer carrying sheet was produced. Subsequently, the obtained gas adsorbing layer carrying sheet was formed into a single cardboard sheet having a peak height of 2.5 mm and a peak interval of 4.1 mm with a corrugating machine. The single-stage cardboard sheets were stacked 40 times and cut to obtain a honeycomb-shaped filter having a size of 100 mm × 100 mm and a layer length of 30 mm.
＜比較例４＞
実施例２と同様に作成したシート基材：１００重量部に対し、トロメタミン：２５重量部をシート基材の両面にコートし、目付：７５ｇ／ｍ２、厚み：０．２４ｍｍのガス吸着層担持シートを製造した。続いて、得られたガス吸着層担持シートをコルゲート加工機にて、山高２．５ｍｍ 、山間隔４．１ｍｍの片段ボールシートに成形した。この片段ボールシートを４０段重ね、切断加工して、１００ｍｍ×１００ｍｍ、層長３０ｍｍのハニカム形状のフィルタを得た。
<Comparative Example 4>
Sheet base material prepared in the same manner as in Example 2: 100 parts by weight of tromethamine: 25 parts by weight were coated on both sides of the sheet base material, and the basis weight was 75 g / m 2 and the thickness was 0.24 mm. A sheet was produced. Subsequently, the obtained gas adsorbing layer carrying sheet was formed into a single cardboard sheet having a peak height of 2.5 mm and a peak interval of 4.1 mm with a corrugating machine. The single-stage cardboard sheets were stacked 40 times and cut to obtain a honeycomb-shaped filter having a size of 100 mm × 100 mm and a layer length of 30 mm.
＜比較例５＞
実施例２と同様に作成したシート基材をそのまま用いて、コルゲート加工機にて、山高２．５ｍｍ 、山間隔４．１ｍｍの片段ボールシートを成形した。この片段ボールシートを４０段重ね、切断加工して、１００ｍｍ×１００ｍｍ、層長３０ｍｍのハニカム形状のフィルタを得た。
<Comparative Example 5>
Using the sheet base material prepared in the same manner as in Example 2, a corrugated processing machine was used to form a single cardboard sheet having a peak height of 2.5 mm and a peak interval of 4.1 mm. The single-stage cardboard sheets were stacked 40 times and cut to obtain a honeycomb-shaped filter having a size of 100 mm × 100 mm and a layer length of 30 mm.
以下、実施例１〜７および比較例１〜５について考察する。実施例１〜７では、ホルムアルデヒド除去率は高い（５０％以上）傾向であった。また、ホルムアルデヒド吸着容量保持率は高い（９０％以上）傾向となっていた。 Hereinafter, Examples 1 to 7 and Comparative Examples 1 to 5 will be considered. In Examples 1 to 7, the formaldehyde removal rate tended to be high (50% or more). Moreover, the formaldehyde adsorption capacity retention rate tended to be high (90% or more).
それに対して、シート基材の目付が３０ｇ／ｍ２よりも小さい場合（比較例１）、トロメタミンの担持量が５．０重量部よりも小さい場合（比較例２）、並びに、トロメタミンおよびリン酸を担持していない場合（比較例５）は、活性炭またはトロメタミンの担持量が少ないため、ホルムアルデヒド除去率は低い（５０％未満）傾向であった。 In contrast, when the basis weight of the sheet base material is smaller than 30 g / m 2 (Comparative Example 1), when the amount of tromethamine supported is smaller than 5.0 parts by weight (Comparative Example 2), tromethamine and phosphoric acid In the case of not supporting (Comparative Example 5), the amount of activated carbon or tromethamine supported was small, so the formaldehyde removal rate tended to be low (less than 50%).
また、リン酸の担持量が１．０重量部よりも小さい場合（比較例３）、およびリン酸を担持していない場合（比較例４）は、トロメタミンの吸着容量の経時的な性能低下が大きくなった。そのため、ホルムアルデヒド吸着容量保持率が低い（７０％以下）傾向となっていた。 In addition, when the amount of phosphoric acid supported is smaller than 1.0 part by weight (Comparative Example 3) and when no phosphoric acid is supported (Comparative Example 4), the tromethamine adsorption capacity decreases with time. It became bigger. Therefore, the formaldehyde adsorption capacity retention rate tends to be low (70% or less).
なお、上記実施形態および各実施例は、本発明を限定する性質のものではなく、前・後記の趣旨に沿って設計変更することはいずれも本発明の技術的範囲に含まれるものである。 In addition, the said embodiment and each Example are not the things of the property which limits this invention, Any change in design in accordance with the meaning of the above-mentioned and postscript is included in the technical scope of this invention.
本発明により、低級脂肪族アルデヒドに対して高い吸着性を有し、吸着容量の経時的な低下の少ないシートおよびフィルタを提供することが可能である。そのため、自動車、空気清浄機やエアコン、コピー機、プリンター、多機能ＯＡ機器やトイレ脱臭機など幅広い分野で用いることができ、産業界に大きく寄与することが可能である。
According to the present invention, it is possible to provide a sheet and a filter that have a high adsorptivity to a lower aliphatic aldehyde and have little decrease in adsorption capacity over time. Therefore, it can be used in a wide range of fields such as automobiles, air purifiers, air conditioners, photocopiers, printers, multifunctional OA devices and toilet deodorizers, and can greatly contribute to the industry.
Claims (4)
The filter according to claim 3, wherein the filter has a honeycomb shape.
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Citations (8)
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| JP2001232189A (en) * | 2000-02-22 | 2001-08-28 | Kuraray Chem Corp | Porous adsorbent and filter |
| JP2006320711A (en) * | 2005-04-21 | 2006-11-30 | Kao Corp | Deodorant |
| JP2006320712A (en) * | 2005-04-21 | 2006-11-30 | Kao Corp | Deodorant composition |
| JP2007044422A (en) * | 2005-08-12 | 2007-02-22 | Kao Corp | Deodorant composition |
| JP2008086436A (en) * | 2006-09-29 | 2008-04-17 | Kao Corp | Deodorizing filter |
| JP2009247419A (en) * | 2008-04-02 | 2009-10-29 | Kao Corp | Deodorizing filter |
| JP2010057955A (en) * | 2009-12-08 | 2010-03-18 | Kao Corp | Deodorizing filter |
| JP2014073439A (en) * | 2012-10-03 | 2014-04-24 | Kao Corp | Gas adsorbent |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001232189A (en) * | 2000-02-22 | 2001-08-28 | Kuraray Chem Corp | Porous adsorbent and filter |
| JP2006320711A (en) * | 2005-04-21 | 2006-11-30 | Kao Corp | Deodorant |
| JP2006320712A (en) * | 2005-04-21 | 2006-11-30 | Kao Corp | Deodorant composition |
| JP2007044422A (en) * | 2005-08-12 | 2007-02-22 | Kao Corp | Deodorant composition |
| JP2008086436A (en) * | 2006-09-29 | 2008-04-17 | Kao Corp | Deodorizing filter |
| JP2009247419A (en) * | 2008-04-02 | 2009-10-29 | Kao Corp | Deodorizing filter |
| JP2010057955A (en) * | 2009-12-08 | 2010-03-18 | Kao Corp | Deodorizing filter |
| JP2014073439A (en) * | 2012-10-03 | 2014-04-24 | Kao Corp | Gas adsorbent |
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