JP5168242B2 - Ozone filter - Google Patents
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- JP5168242B2 JP5168242B2 JP2009166413A JP2009166413A JP5168242B2 JP 5168242 B2 JP5168242 B2 JP 5168242B2 JP 2009166413 A JP2009166413 A JP 2009166413A JP 2009166413 A JP2009166413 A JP 2009166413A JP 5168242 B2 JP5168242 B2 JP 5168242B2
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Description
本発明は、画像形成装置内で生ずるオゾンを除去するために設置するオゾンフィルターに関するものである。 The present invention relates to an ozone filter installed for removing ozone generated in an image forming apparatus.
コロナ放電による帯電方式を採用した電子写真複写機、レーザービームプリンターなどの画像形成装置では、コロナ放電が機内の空気中で行われるために、機内に多量のオゾンが発生することになる。そして、このオゾンは、非常に臭いの強く、酸化性の高い気体であり、空気中に０．１ｐｐｍの濃度が存在するだけで、息切れやめまい、吐き気、頭痛などの生理作用を生じさせるものであるため、事務用機器としてはこのようなオゾンを機外に漏洩させることは大きな欠陥とされている。 In an image forming apparatus such as an electrophotographic copying machine or a laser beam printer that employs a charging method using corona discharge, a large amount of ozone is generated in the apparatus because corona discharge is performed in the air in the apparatus. And this ozone is a very odorous and highly oxidative gas, and it produces physiological effects such as shortness of breath, dizziness, nausea, and headaches just by having a concentration of 0.1 ppm in the air. For this reason, leaking ozone out of the machine is regarded as a major defect for office equipment.
かかる問題を克服するため、当該画像形成装置の排気経路にオゾンフィルターを取り付けることが従来から行われており、排気を効率的に行うという観点から当該フィルターは通気抵抗の小さいハニカム構造体が採用されている。 In order to overcome such a problem, it has been conventionally performed to attach an ozone filter to the exhaust path of the image forming apparatus. From the viewpoint of efficiently exhausting, the filter employs a honeycomb structure having a low ventilation resistance. ing.
オゾンフィルターのオゾン分解剤は、例えば、特許文献１には、特定の細孔径を有する繊維状活性炭をハニカム状に加工したフィルターが提案されている。しかし、オゾン分解剤として活性炭のみを使用した場合、オゾンの除去は吸着の他、活性炭によるオゾンの還元分解によっても進行するため、オゾンの除去とともに活性炭の劣化が進行することは避けがたく、結果的にフィルター寿命が短くなるという問題を生じていた。 As an ozonolysis agent for an ozone filter, for example, Patent Document 1 proposes a filter obtained by processing fibrous activated carbon having a specific pore diameter into a honeycomb shape. However, when only activated carbon is used as the ozone decomposing agent, the removal of ozone proceeds not only by adsorption but also by reductive decomposition of ozone by activated carbon, so it is inevitable that the deterioration of activated carbon proceeds with the removal of ozone. In particular, there has been a problem that the filter life is shortened.
オゾンフィルターの長寿命化のため、近年、金属酸化物を使用したオゾンフィルターが採用されている。例えば、特許文献２には、マンガン等の金属酸化物に活性炭を添加したオゾンフィルター、特許文献３には、一体型のハニカム担体に無定形二酸化マンガンおよびゼオライトを担持したオゾンフィルターが提案されている。しかし、金属酸化物担持フィルターを複写機等に長時間使用すると、オゾン分解性能には問題がなくても、異臭を発する場合があった。 In recent years, ozone filters using metal oxides have been adopted to extend the life of ozone filters. For example, Patent Document 2 proposes an ozone filter in which activated carbon is added to a metal oxide such as manganese, and Patent Document 3 proposes an ozone filter in which amorphous manganese dioxide and zeolite are supported on an integral honeycomb carrier. . However, when a metal oxide-carrying filter is used for a long time in a copying machine or the like, an odor may be emitted even if there is no problem in ozonolysis performance.
本発明は上記問題を解決するために、まず、異臭発生のメカニズムを解明するために、種々の分析およびモデルテストを繰り返した。まず、金属酸化物担持フィルターを外気も進入してくる一般的に試験室で、オゾンを３００時間連続又は間欠負荷を行っても異臭の発生が無いことから、オゾンフィルター自身がオゾンに依って酸化分解されて、異臭を発生する現象は起きていないことが分かった。 In the present invention, in order to solve the above problems, first, various analyzes and model tests were repeated in order to elucidate the mechanism of the generation of off-flavor. First, in a test room where outside air also enters the metal oxide-carrying filter, since ozone does not generate a bad odor even if ozone is applied for 300 hours continuously or intermittently, the ozone filter itself is oxidized by ozone. It was found that the phenomenon of decomposition and generation of off-flavors did not occur.
次に、４５枚／分のモノクロ複写機を使用して、トナー定着後の排気経路にオゾンフィルターを設置した。設置部はオゾンを含まない排気部とオゾンを含む排気部の２カ所に各々金属酸化物担持フィルターを設置し、５万枚の負荷を行った。オゾン負荷時間は約１８時間に相当する。オゾン負荷を行った金属酸化物担持フィルターの官能評価した結果、オゾンを含まない排気部に設置したフィルターからは異臭の発生が無かった。しかし、オゾンを含む排気部に設置したフィルターからは、残存オゾン以外の不快な臭気が認められた。 Next, an ozone filter was installed in the exhaust path after fixing the toner using a monochrome copying machine of 45 sheets / min. The installation part installed the metal oxide carrying | support filter in two places, the exhaust part which does not contain ozone, and the exhaust part which contains ozone, and performed the load of 50,000 sheets. The ozone loading time corresponds to about 18 hours. As a result of sensory evaluation of the metal oxide-carrying filter subjected to ozone loading, no odor was generated from the filter installed in the exhaust part not containing ozone. However, an unpleasant odor other than residual ozone was observed from the filter installed in the exhaust part containing ozone.
発明者は、金属酸化物担持フィルターを設置したコピー機（画像形成装置）の機構を詳細に解析し、異臭発生のメカニズムが以下の通りであることを確認した。ペーパーにトナーを定着する際に、１２０〜３００℃（１６０〜２００℃の場合が多い）の高温で処理される。この加熱処理により、トナー及びペーパーの揮発性成分が発生し、金属酸化物担持フィルターに吸着または付着される。この吸着、付着物質がオゾンと金属酸化物に依って、酸化分解され、低級脂肪酸、炭化水素等が生成する。この低級脂肪酸、炭化水素等の甘酸っぱい臭気が異臭となり、金属酸化物担持フィルターから発生することが分かった。 The inventor has analyzed in detail the mechanism of a copying machine (image forming apparatus) in which a metal oxide-carrying filter is installed, and has confirmed that the mechanism of generation of a strange odor is as follows. When the toner is fixed on the paper, it is processed at a high temperature of 120 to 300 ° C. (often 160 to 200 ° C.). By this heat treatment, volatile components of toner and paper are generated and adsorbed or adhered to the metal oxide-carrying filter. The adsorbed and adhered substances are oxidatively decomposed by ozone and metal oxide, and lower fatty acids, hydrocarbons and the like are generated. It was found that the sweet and sour odors such as lower fatty acids and hydrocarbons become off-flavors and are generated from the metal oxide-carrying filter.
トナーの揮発性成分はトルエン、キシレン、スチレン等の芳香族炭化水素が多く含まれる。一方、ペーパーはＣ１２〜２０ぐらいの脂肪族炭化水素が多く含まれることが分かった。この両者と甘酸っぱい臭気を効率良く除去することで、金属酸化物担持フィルターからの異臭発生の低減できる可能性がある。本発明は圧力損失が小さく、オゾン分解性能に優れ、更に、複写機等で長時間使用しても異臭の発生がしないオゾンフィルターを提供することにある。 The volatile component of the toner is rich in aromatic hydrocarbons such as toluene, xylene, and styrene. On the other hand, the paper was found to contain a large amount of C12-20 aliphatic hydrocarbons. By efficiently removing both of them and the sweet and sour odor, there is a possibility that generation of off-flavor from the metal oxide-carrying filter can be reduced. An object of the present invention is to provide an ozone filter which has a small pressure loss, excellent ozone decomposition performance, and does not generate a bad odor even when used for a long time in a copying machine or the like.
即ち、本発明は、画像形成装置内で生ずるオゾンを除去するために、排気経路に装着するオゾンフィルターにおいて、上流側にトルエン吸着量が５ｍｇ／ｃｃ以上の活性炭担持フィルターを設置し、下流側に酢酸吸着量が２．５ｍｇ／ｃｃ以上の金属酸化物担持フィルターを設置したオゾンフィルターを提供するものである。 That is, according to the present invention, in order to remove ozone generated in the image forming apparatus, an activated carbon-carrying filter having a toluene adsorption amount of 5 mg / cc or more is installed on the upstream side in the ozone filter mounted on the exhaust path, and the downstream side is installed. An ozone filter provided with a metal oxide-carrying filter having an acetic acid adsorption amount of 2.5 mg / cc or more is provided.
前記活性炭担持フィルターと金属酸化物担持フィルターは、ハニカム形状であることにより、圧力損失が小さく、オゾン分解性能に優れ、複写機等で長時間使用しても異臭の発生を低減することが可能となった。更に、使用開始直後から若干発生している甘酸っぱい臭気以外の臭気に関しても、低減することが可能となる。 The activated carbon-carrying filter and the metal oxide-carrying filter have a honeycomb shape, so that the pressure loss is small, the ozone decomposition performance is excellent, and the generation of off-flavors can be reduced even when used for a long time in a copying machine or the like. became. Furthermore, it is possible to reduce odors other than the sweet and sour odor that are slightly generated immediately after the start of use.
本発明は以上述べたように画像形成装置内で生ずるオゾンを除去するために、排気経路に装着するオゾンフィルターにおいて、上流側にトルエン吸着量が５ｍｇ／ｃｃ以上の活性炭担持フィルターを設置し、下流側に酢酸吸着量が２．５ｍｇ／ｃｃ以上の金属酸化物担持フィルターを設置したオゾンフィルターを提供するものである。 In the present invention, in order to remove ozone generated in the image forming apparatus as described above, an activated carbon-carrying filter having a toluene adsorption amount of 5 mg / cc or more is installed on the upstream side in the ozone filter attached to the exhaust path, and the downstream side. The ozone filter which provided the metal oxide carrying | support filter whose acetic acid adsorption amount is 2.5 mg / cc or more in the side is provided.
本発明は画像形成装置内で生ずるオゾンを除去するために、排気口に装着するオゾンフィルターにおいて、上流側にトルエン吸着容量が５ｍｇ／ｃｃ以上の活性炭担持フィルターを設置し、下流側に酢酸吸着容量が２．５ｍｇ／ｃｃ以上の金属酸化物担持フィルターを設置したことにより、圧力損失が小さく、オゾン分解性能に優れ、複写機等で長時間使用しても異臭の発生を低減することが可能となった。以下、本発明の作用について説明する。 In the present invention, in order to remove ozone generated in the image forming apparatus, an activated carbon-supporting filter having a toluene adsorption capacity of 5 mg / cc or more is installed on the upstream side and an acetic acid adsorption capacity is installed on the downstream side. Installed a metal oxide-carrying filter of 2.5 mg / cc or more, pressure loss is small, ozonolysis performance is excellent, and it is possible to reduce the generation of off-flavors even when used for a long time in a copying machine etc. became. The operation of the present invention will be described below.
本発明に用いられる活性炭担持フィルターとしては、増粒炭をウレタンまたは不織布等の基材に担持したフィルター、微粒子状活性炭を湿式または乾式の処方で不織布等の基材に担持したシートをプリーツ加工したフィルター、粉末状活性炭を湿式または乾式の処方で不織布等の基材に担持したシートをハニカム加工したフィルター、粉末状活性炭を湿式または乾式の処方で、アルミ箔からなるハニカム基材に担持したフィルター等が使用できる。通常、画像形成装置は低圧力損失の要望が強く、ハニカム型フィルターが最適である。 As the activated carbon-carrying filter used in the present invention, a filter in which granulated coal is supported on a substrate such as urethane or nonwoven fabric, and a sheet in which particulate activated carbon is supported on a substrate such as nonwoven fabric by a wet or dry formulation is pleated. A filter, a filter in which a powdery activated carbon is supported by a wet or dry prescription on a substrate such as a nonwoven fabric, a honeycomb processed filter, a powdery activated carbon in a wet or dry prescription on a honeycomb base made of aluminum foil, etc. Can be used. Usually, an image forming apparatus has a strong demand for low pressure loss, and a honeycomb filter is most suitable.
ハニカム形状にする方法は従来公知の加工方法を採用することができる。本発明においてハニカム形状とは、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のものを意味する。例えば、正弦波形のハニカム形状とするには、まず活性炭担持シートを賦形ロールに通して波形に賦形し、波形の当該活性炭担持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型フィルターとする。 A conventionally known processing method can be adopted as a method for forming the honeycomb shape. In the present invention, the honeycomb shape has a shape in which a hollow column body such as a hollow polygonal column or a hollow cylinder is continuously formed in addition to a hexagonal cross section, a square shape, a sinusoidal waveform, a roll shape, etc. means. For example, in order to obtain a sinusoidal honeycomb shape, first, an activated carbon-supporting sheet is passed through a shaping roll and shaped into a corrugation, and a flat sheet is joined to one or both sides of the corrugated activated carbon-supporting sheet. This is laminated to form a sinusoidal honeycomb type filter.
上記のような正弦波形のハニカム型フィルターを形成する場合には、波形の頂点に接着剤を付けて平らなシートと接合するのが普通であるが、波形の活性炭担持シートを積層するとその間にある平らなシートは必然的に固定されるので、必ずしも接着剤を付ける必要はない。なお、接着剤を付ける場合は活性炭担持シートの吸着能を損なわないものを使用する必要がある。接着剤としては例えば、アクリル系、塩ビ系、酢ビ系、ゴム系、エポキシ系の有機バインダー、又は水ガラス、アルミナゾル、シリカゾル等の無機バインダー使用できる。 When forming a sinusoidal honeycomb filter as described above, it is common to attach an adhesive to the top of the corrugation and join it with a flat sheet, but when corrugated activated carbon-carrying sheets are laminated, it is between them. Since the flat sheet is necessarily fixed, it is not always necessary to apply an adhesive. In addition, when attaching an adhesive agent, it is necessary to use what does not impair the adsorption capacity of the activated carbon carrying sheet. As the adhesive, for example, acrylic, vinyl chloride, vinyl acetate, rubber, and epoxy organic binders, or inorganic binders such as water glass, alumina sol, and silica sol can be used.
上記のハニカム型活性炭担持フィルターの空隙率は、５０〜８５％であることが好ましい。この空隙率が５０％未満では通過する流体の圧力損失が大きくなり、８５％を越えると強度面で耐久性が落ちる場合がある。尚、空隙率は、図１に示したピッチ幅や山高さ等を調整することによって制御することができる。 The porosity of the honeycomb-type activated carbon-carrying filter is preferably 50 to 85%. When the porosity is less than 50%, the pressure loss of the fluid passing therethrough increases, and when it exceeds 85%, the durability may decrease in terms of strength. The porosity can be controlled by adjusting the pitch width, peak height, etc. shown in FIG.
本発明に用いられる活性炭の種類は、特に限定はなく、例えば木材（木炭）やのこ屑、果実殻（ヤシ殻、棉実殻、もみ殻、コーヒー豆など）、セルロース、リグニン、パルプなどの植物系原料；褐炭、亜炭、泥炭、無煙炭、石油スラッジなどの鉱物系原料等を素材とし、塩化亜鉛などを使用した薬品賦活あるいは水蒸気などを用いたガス賦活等を施すことにより得られた活性炭が挙げられる。 The type of activated carbon used in the present invention is not particularly limited, and examples thereof include wood (charcoal), sawdust, fruit shells (coconut shell, coconut shell, rice husk, coffee beans, etc.), cellulose, lignin, pulp, and the like. Plant-based raw materials: Activated carbon obtained by applying chemical activation using zinc chloride or gas activation using steam or the like, using raw materials such as lignite, lignite, peat, anthracite and petroleum sludge as raw materials Can be mentioned.
活性炭の形状は、粉末状、粒状、繊維状のいずれであってもよいが、ハニカム型フィルターに使用する場合は、高充填量化を行う必要があり、粉末状や粒状のものが好ましく、粉末状のものがより好ましい。 The shape of the activated carbon may be any of powder, granule, and fiber. However, when used for a honeycomb filter, it is necessary to increase the amount of filling, and powder or granule is preferable. Are more preferred.
この際、粉末状あるいは粒状の活性炭の粉粒径としては、１〜１５０μｍが好ましく、より好ましくは１〜１００μｍである。また、シート基材上に担持する活性炭としては特に１〜３０μｍの範囲がよい。粒径が１μｍ未満の活性炭では、飛散や凝着など取り扱い性が悪く、他方１５０μｍより大きい活性炭では、活性炭担持シートの薄層化、高充填量化が困難であり、また当該シートからの活性炭の剥離を招く恐れがある。 At this time, the powder particle size of the powdered or granular activated carbon is preferably 1 to 150 μm, more preferably 1 to 100 μm. The activated carbon supported on the sheet substrate is particularly preferably in the range of 1 to 30 μm. With activated carbon having a particle size of less than 1 μm, handling properties such as scattering and adhesion are poor. On the other hand, with activated carbon larger than 150 μm, it is difficult to make the activated carbon-carrying sheet thin and to increase the filling amount, and the activated carbon is peeled off from the sheet. There is a risk of inviting.
本発明に用いられる活性炭の比表面積は、８００ｍ２／ｇ以上が好ましく、１，０００ｍ２／ｇ以上がより好ましい。活性炭の比表面積が８００ｍ２／ｇより小さいと、担持量を多くする必要があり、ハニカムの空隙率が大幅に低下し、圧力損失が大きくなる恐れがあるからである。 The specific surface area of the activated carbon used in the present invention is preferably 800 m 2 / g or more, and more preferably 1,000 m 2 / g or more. This is because if the specific surface area of the activated carbon is smaller than 800 m 2 / g, it is necessary to increase the supported amount, and the porosity of the honeycomb is greatly lowered, and the pressure loss may be increased.
本発明において活性炭担持フィルターに含まれる活性炭量は８〜８０ｍｇ／ｃｃが好ましい。より好ましい範囲について述べると、下限値としては、１０ｍｇ／ｃｃ以上であり、さらに好ましくは１５ｍｇ／ｃｃ以上である。他方上限としては、７０ｍｇ／ｃｃ以下であり、さらに好ましくは６０ｍｇ／ｃｃ以下である。８ｍｇ／ｃｃ未満の場合は、十分な吸着性能が得られず、他方８０ｍｇ／ｃｃを越える場合は、ハニカムの空隙率が大幅に低下し、圧力損失が大きくなる恐れがあるからである。 In the present invention, the amount of activated carbon contained in the activated carbon-supporting filter is preferably 8 to 80 mg / cc. More specifically, the lower limit is 10 mg / cc or more, and more preferably 15 mg / cc or more. On the other hand, the upper limit is 70 mg / cc or less, and more preferably 60 mg / cc or less. If it is less than 8 mg / cc, sufficient adsorption performance cannot be obtained. On the other hand, if it exceeds 80 mg / cc, the porosity of the honeycomb is greatly reduced, and the pressure loss may be increased.
上記の活性炭の種類、粒径、比表面積、担持量を調整することにより、トルエン吸着量を５ｍｇ／ｃｃ以上、より好ましくは８ｍｇ／ｃｃ以上、特に好ましくは１０ｍｇ／ｃｃ以上の特性を発現する活性炭担持フィルターが作製できる。特性上のトルエン吸着量の上限は特にないが、トルエン吸着量が高すぎる場合、活性炭は強度が不足し微粒子化する場合が多く、１５０ｍｇ／ｃｃ以下である事が望ましく、さらに望ましくは１００ｍｇ／ｃｃ以下である。 By adjusting the type, particle size, specific surface area, and supported amount of the activated carbon, the activated carbon that exhibits the characteristics of toluene adsorption amount of 5 mg / cc or more, more preferably 8 mg / cc or more, and particularly preferably 10 mg / cc or more. A supported filter can be produced. There is no particular upper limit on the amount of toluene adsorbed on the properties, but when the amount of toluene adsorbed is too high, the activated carbon is often insufficient in strength and fine particles, and is preferably 150 mg / cc or less, more preferably 100 mg / cc. It is as follows.
一方、本発明に用いられる金属酸化物担持フィルターとしては、活性炭担持フィルターと同様にウレタンまたは不織布等の基材に金属酸化物を担持したフィルター、不織布等の基材に金属酸化物を担持したシートをプリーツ加工したフィルター、不織布等の基材に金属酸化物を担持したシートをハニカム加工したフィルター、アルミ箔からなるハニカム基材に金属酸化物を担持したフィルター等が使用できる。活性炭担持フィルターと同様に、圧力損失の特性によって、ハニカム型フィルターが最適である。 On the other hand, the metal oxide-carrying filter used in the present invention is a filter in which a metal oxide is carried on a substrate such as urethane or a nonwoven fabric, as in the case of an activated carbon-carrying filter, or a sheet in which a metal oxide is carried on a substrate such as a nonwoven fabric. A filter in which a metal oxide is supported on a base material such as a nonwoven fabric, a filter in which a metal oxide is supported on a honeycomb base material made of aluminum foil, or a filter can be used. Similar to the activated carbon-supported filter, the honeycomb type filter is optimal due to the characteristics of pressure loss.
上記のハニカム型金属酸化物担持フィルターの空隙率は、５０〜８５％であることが好ましい。この空隙率が５０％未満では通過する流体の圧力損失が大きくなり、８５％を越えると強度面で耐久性が落ちる場合がある。尚、空隙率は、活性炭担持フィルターと同様に図１に示したピッチ幅や山高さ等を調整することによって制御することができる。 The porosity of the honeycomb-type metal oxide-carrying filter is preferably 50 to 85%. When the porosity is less than 50%, the pressure loss of the fluid passing therethrough increases, and when it exceeds 85%, the durability may decrease in terms of strength. The porosity can be controlled by adjusting the pitch width, peak height, etc. shown in FIG.
本発明に用いられる金属酸化物としては、マンガン、銅、コバルト、ニッケル、鉄、ニッケル、チタン、銀等の単一酸化物、複合酸化物が挙げられる。特に、マンガンの単一酸化物、複合酸化物がより好ましい。 Examples of the metal oxide used in the present invention include single oxides and composite oxides such as manganese, copper, cobalt, nickel, iron, nickel, titanium, and silver. In particular, manganese single oxide and composite oxide are more preferable.
また、上記金属酸化物の形状については、粉末状が好ましく、粉末状の金属酸化物では、その粉粒径としては、１〜１００μｍより好ましくは１〜５０μｍのものを使用するのが良い。即ち、粒径が１μｍ未満のものでは、飛散や凝集等が生じて取り扱い性が悪く、一方粒径が１５０μｍを越えるような大きなものでは、高充填量化が困難となり、また当該フィルターからの剥離を招く恐れがある。 Moreover, about the shape of the said metal oxide, a powder form is preferable and it is good to use a powder-form metal oxide as a powder particle diameter with 1-100 micrometers, More preferably, 1-50 micrometers. That is, when the particle size is less than 1 μm, scattering or aggregation occurs, resulting in poor handleability. On the other hand, when the particle size is larger than 150 μm, it is difficult to increase the filling amount, and peeling from the filter is difficult. There is a risk of inviting.
本発明に用いられる金属酸化物の比表面積は、５０ｍ２／ｇ以上、１００ｍ２／ｇ以上であることがより好ましい。金属酸化物の比表面積が５０ｍ２／ｇよりも小さくなると、金属酸化物の触媒活性点が少なくなりオゾンの除去性能が低下する恐れがある。またこれ以上の表面積では効果はほぼ一定となり、大きくする意味がなくなる。 The specific surface area of the metal oxide used in the present invention is more preferably 50 m 2 / g or more and 100 m 2 / g or more. When the specific surface area of the metal oxide is smaller than 50 m 2 / g, the catalytic activity point of the metal oxide is reduced, and the ozone removal performance may be lowered. If the surface area is larger than this, the effect becomes almost constant, and there is no point in increasing the effect.
本発明の金属酸化物担持フィルターに含まれる金属酸化物量は２０〜８０ｍｇ／ｃｃであることが好ましい。この量が２０ｍｇ／ｃｃ未満の場合は十分なオゾン除去性能が得られず、一方、８０ｍｇ／ｃｃを越える場合には、ハニカムの空隙率が大幅に低下し、圧力損失が大きくなる恐れがあるからである。 The amount of metal oxide contained in the metal oxide-carrying filter of the present invention is preferably 20 to 80 mg / cc. When this amount is less than 20 mg / cc, sufficient ozone removal performance cannot be obtained. On the other hand, when it exceeds 80 mg / cc, the porosity of the honeycomb is greatly reduced, and the pressure loss may be increased. It is.
金属酸化物担持フィルターに用いられる活性炭の種類は、特に限定はなく、例えば木材（木炭）やのこ屑、果実殻（ヤシ殻、棉実殻、もみ殻、コーヒー豆など）、セルロース、リグニン、パルプなどの植物系原料；褐炭、亜炭、泥炭、無煙炭、石油スラッジなどの鉱物系原料等を素材とし、塩化亜鉛などを使用した薬品賦活あるいは水蒸気などを用いたガス賦活等を施すことにより得られた活性炭が挙げられる。 There are no particular limitations on the type of activated carbon used in the metal oxide-carrying filter, such as wood (charcoal), sawdust, fruit shells (coconut shell, coconut shell, rice husk, coffee beans, etc.), cellulose, lignin, Plant raw materials such as pulp; obtained from mineral raw materials such as lignite, lignite, peat, anthracite, and petroleum sludge, and chemical activation using zinc chloride or gas activation using steam Activated carbon.
特に、甘酸っぱい臭気の成分は酢酸等の低級脂肪酸であり、特に酢酸の除去効率を向上させる必要がある。酢酸吸着量を向上させる方法は、カリウム、ナトリウムのアルカリ金属塩を担持させた活性炭、カリウム、ナトリウム等を多く含む木質系の活性炭がより好ましい。 In particular, the sweet and sour odor component is a lower fatty acid such as acetic acid, and it is particularly necessary to improve the removal efficiency of acetic acid. The method for improving the amount of acetic acid adsorbed is more preferably activated carbon carrying an alkali metal salt of potassium or sodium, or wood-based activated carbon containing a large amount of potassium, sodium or the like.
活性炭の形状は、粉末状、粒状、繊維状のいずれであってもよいが、ハニカム型フィルターに使用する場合は、高充填量化を行う必要があり、粉末状や粒状のものが好ましく、粉末状のものがより好ましい。 The shape of the activated carbon may be any of powder, granule, and fiber. However, when used for a honeycomb filter, it is necessary to increase the amount of filling, and powder or granule is preferable. Are more preferred.
この際、粉末状あるいは粒状の活性炭の粉粒径としては、１〜１５０μｍが好ましく、より好ましくは１〜１００μｍである。また、シート基材上に担持する活性炭としては特に１〜３０μｍの範囲がよい。粒径が１μｍ未満の活性炭では、飛散や凝着など取り扱い性が悪く、他方１５０μｍより大きい活性炭では、活性炭担持シートの薄層化、高充填量化が困難であり、また当該シートからの活性炭の剥離を招く恐れがある。 At this time, the powder particle size of the powdered or granular activated carbon is preferably 1 to 150 μm, more preferably 1 to 100 μm. The activated carbon supported on the sheet substrate is particularly preferably in the range of 1 to 30 μm. With activated carbon having a particle size of less than 1 μm, handling properties such as scattering and adhesion are poor. On the other hand, with activated carbon larger than 150 μm, it is difficult to make the activated carbon-carrying sheet thin and to increase the filling amount, and the activated carbon is peeled off from the sheet. There is a risk of inviting.
本発明に用いられる活性炭の比表面積は、８００ｍ２／ｇ以上が好ましく、１，０００ｍ２／ｇ以上がより好ましい。活性炭の比表面積が８００ｍ２／ｇより小さいと、担持量を多くする必要があり、ハニカムの空隙率が大幅に低下し、圧力損失が大きくなる恐れがあるからである。 The specific surface area of the activated carbon used in the present invention is preferably 800 m 2 / g or more, and more preferably 1,000 m 2 / g or more. This is because if the specific surface area of the activated carbon is smaller than 800 m 2 / g, it is necessary to increase the supported amount, and the porosity of the honeycomb is greatly lowered, and the pressure loss may be increased.
本発明において金属酸化物担持フィルターに含まれる活性炭量は４〜４０ｍｇ／ｃｃが好ましい。より好ましい範囲について述べると、下限値としては、５ｍｇ／ｃｃ以上であり、さらに好ましくは８ｍｇ／ｃｃ以上である。他方上限としては、３５ｍｇ／ｃｃ以下であり、さらに好ましくは３０ｍｇ／ｃｃ以下である。４ｇ／ｃｃ未満の場合は、十分な酢酸吸着性能が得られず、他方８０ｍｇ／ｃｃを越える場合は、ハニカムの空隙率が大幅に低下し、圧力損失が大きくなる恐れがあるからである。 In the present invention, the amount of activated carbon contained in the metal oxide-carrying filter is preferably 4 to 40 mg / cc. More specifically, the lower limit is 5 mg / cc or more, and more preferably 8 mg / cc or more. On the other hand, the upper limit is 35 mg / cc or less, more preferably 30 mg / cc or less. If the amount is less than 4 g / cc, sufficient acetic acid adsorption performance cannot be obtained. On the other hand, if it exceeds 80 mg / cc, the porosity of the honeycomb is significantly reduced, and the pressure loss may be increased.
上記の活性炭の種類、粒径、比表面積、担持量を調整することにより、酢酸吸着量を２．５ｍｇ／ｃｃ以上、より好ましくは４ｍｇ／ｃｃ以上の特性を発現する金属酸化物担持フィルターが作製できる。特性上の酢酸吸着量の上限は特にないが、酢酸吸着量が高すぎる場合、活性炭は強度が不足し微粒子化する場合が多く、１２０ｍｇ／ｃｃ以下である事が望ましく、さらに望ましくは８０ｍｇ／ｃｃ以下である。 By adjusting the type, particle size, specific surface area, and supported amount of the activated carbon, a metal oxide-supported filter that exhibits a characteristic of acetic acid adsorption amount of 2.5 mg / cc or more, more preferably 4 mg / cc or more is produced. it can. There is no particular upper limit for the amount of acetic acid adsorbed on the characteristics, but if the amount of acetic acid adsorbed is too high, the activated carbon is often insufficient in strength and fine particles, and is desirably 120 mg / cc or less, more desirably 80 mg / cc. It is as follows.
活性炭担持フィルターと金属酸化物担持フィルターの設置方法は、トナー及びペーパーの揮発性成分を除去する活性炭担持フィルターを上流に設置し、その下流側に金属酸化物担持フィルターを設置することにより、金属酸化物担持フィルターからの異臭発生を低減できる。活性炭担持フィルターを金属酸化物担持フィルターの下流に設置した場合、画像形成装置の使用開始直後からトナー及びペーパーの揮発性成分の負荷が始まり、活性炭担持フィルターを設置しない場合と比較しては、長時間使用できるが、効果が小さい。 The installation method of the activated carbon-supported filter and the metal oxide-supported filter is as follows: an activated carbon-supported filter that removes volatile components of toner and paper is installed upstream, and a metal oxide-supported filter is installed downstream of the filter, thereby oxidizing metal Odor generation from the object-carrying filter can be reduced. When the activated carbon-carrying filter is installed downstream of the metal oxide-carrying filter, the load of volatile components of the toner and paper starts immediately after the start of use of the image forming apparatus, which is longer than when the activated carbon-carrying filter is not installed. Can be used for hours, but the effect is small.
活性炭担持フィルターと金属酸化物担持フィルターは、両者が接している状態でも良く、離れていても、効果が変わらない。両者のフィルター端部からのオゾンのリークを防止するために、シール材のウレタンフォームを両面テープで端部を巻く場合があるが、両者が接している場合は、両者を重ね合わせ、ウレタンフォームで一体品にすることも可能である。 The activated carbon-carrying filter and the metal oxide-carrying filter may be in contact with each other, or the effect does not change even if they are separated. In order to prevent ozone leakage from both filter ends, the end of the urethane foam of the sealing material may be wound with double-sided tape. It can also be integrated.
トナー定着部からの排気経路において、オゾンを含む排気経路が複数ある場合は、活性炭担持フィルターを各排気経路に設置した方が、金属酸化物担持フィルターにトナー及びペーパーの揮発性成分の負荷が小さくなり、異臭発生を低減できる。 If there are multiple exhaust paths that contain ozone in the exhaust path from the toner fixing unit, the load of volatile components of toner and paper on the metal oxide-supported filter is smaller when an activated carbon-supported filter is installed in each exhaust path. Therefore, generation of off-flavor can be reduced.
トナー及びペーパーからの揮発性成分が多い画像形成装置においては、活性炭担持フィルターのみを交換する事により、金属酸化物担持フィルターからの異臭の発生を更に長時間抑制できる。 In an image forming apparatus having a large amount of volatile components from toner and paper, the occurrence of off-flavor from the metal oxide-carrying filter can be further suppressed for a long time by replacing only the activated carbon-carrying filter.
以下、実施例をあげて、本発明をさらに詳しく説明するが、本発明は下記の実施例に何等限定されるものではない。 Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the following examples.
まず、本実施例で用いたフィルターの試験方法を以下に示す。 First, the test method of the filter used in this example is shown below.
（トルエン吸着量）
ＪＩＳ Ｋ１４７４の溶剤蒸気の吸着性能に準拠し、希釈倍率ｎは１０で吸着試験を実施した。吸着量を測定体積で除して、単位体積当たりの吸着量に算出した。
(Toluene adsorption amount)
In accordance with the solvent vapor adsorption performance of JIS K1474, an adsorption test was conducted at a dilution factor n of 10. The adsorption amount was divided by the measurement volume to calculate the adsorption amount per unit volume.
（酢酸吸着量）
内径６３ｍｍのガラス製カラムに金属酸化物担持フィルターをセットし、温度２５℃、相対湿度５０％に調整した１０ｐｐｍの酢酸を含む空気を線速０．５ｍ／ｓでカラムに供給した。フィルター前後の酢酸濃度から除去率（η［−］）を算出する。除去率の算出方法は次式に酢酸入口濃度（Ｃｉ［ｐｐｍ］）、酢酸出口濃度（Ｃｏ［ｐｐｍ］）を代入して算出した。なお、酢酸濃度は炭化水素計で測定した。
(Acetic acid adsorption amount)
A metal oxide-carrying filter was set on a glass column having an inner diameter of 63 mm, and air containing 10 ppm of acetic acid adjusted to a temperature of 25 ° C. and a relative humidity of 50% was supplied to the column at a linear velocity of 0.5 m / s. The removal rate (η [−]) is calculated from the acetic acid concentration before and after the filter. The removal rate was calculated by substituting the acetic acid inlet concentration (Ci [ppm]) and the acetic acid outlet concentration (Co [ppm]) into the following equation. The acetic acid concentration was measured with a hydrocarbon meter.
η＝１−Ｃｏ／Ｃｉ η = 1−Co / Ci
この除去率が５％に低下するまで試験を継続し、この試験中に測定したカラム入口及び出口の酢酸濃度から算出した除去率と、カラム入口の酢酸濃度および風量から５分毎の酢酸吸着量を求め、それらを積算してカラムに充填したフィルター容積で除して、吸着容量とした。 The test was continued until the removal rate dropped to 5%, and the removal rate calculated from the acetic acid concentration at the column inlet and outlet measured during this test, and the amount of acetic acid adsorbed every 5 minutes from the acetic acid concentration and the air volume at the column inlet. These were integrated and divided by the volume of the filter packed in the column to obtain the adsorption capacity.
（オゾン除去率）
オゾンフィルターを直径６５ｍｍに切断し、内径６５ｍｍのガラス製カラムにセットする。そして、オゾン濃度１ｐｐｍの空気を１ｍ／ｓｅｃで通し、１回の通過でのオゾン除去率を測定した。尚、オゾン濃度は紫外線吸収法オゾン濃度測定器で測定した。そのときの測定条件は、温度２５℃、相対湿度５０％である。
(Ozone removal rate)
The ozone filter is cut to a diameter of 65 mm and set in a glass column having an inner diameter of 65 mm. And the ozone removal rate in one passage was measured by letting air with an ozone concentration of 1 ppm pass at 1 m / sec. The ozone concentration was measured with an ultraviolet absorption method ozone concentration measuring device. The measurement conditions at that time are a temperature of 25 ° C. and a relative humidity of 50%.
（圧力損失）
オゾンフィルターを直径６５ｍｍに切断し、内径６５ｍｍのガラスカラムにセットする。そして、風速：１ｍ／ｓｅｃの条件で圧力損失を測定した。このとき、圧力損失はマノスターゲージを用いて測定した。
(Pressure loss)
The ozone filter is cut to a diameter of 65 mm and set on a glass column having an inner diameter of 65 mm. And the pressure loss was measured on the conditions of a wind speed: 1 m / sec. At this time, the pressure loss was measured using a Manostar gauge.
（オゾンフィルターの臭気）
４５枚／分のモノクロ複写機を使用して、トナー定着後の排気経路に縦横それぞれ９０ｍｍのオゾンフィルターを設置した。通紙１万枚毎に排気口の臭気確認及びオゾンフィルターを複写機から取り出し、オゾンフィルター単体の臭気確認を行った。複写機の排気口の臭気確認は、未使用のオゾンフィルターを設置し、両者の比較で行った。一方、オゾンフィルター単体の臭気確認も、未使用のオゾンフィルターと比較を行った。
(Ozone filter odor)
Using a monochrome copying machine of 45 sheets / min, an ozone filter 90 mm in length and width was installed in the exhaust path after toner fixing. The odor at the exhaust port and the ozone filter were taken out of the copying machine for every 10,000 sheets passed, and the odor of the ozone filter alone was checked. To confirm the odor of the copier exhaust port, an unused ozone filter was installed and compared. On the other hand, the odor of the ozone filter alone was also compared with an unused ozone filter.
（実施例１）
水酸化アルミニウム６０部、アラミドパルプ２０部、ポリエステル１０部、バインダーとしてのポリビニルアルコール１０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２０ｇ／ｍ２、厚さ０．０８ｍｍ）を製造した。得られた抄紙をシート基材として用い、比表面積１２００ｍ２／ｇ、平均粒径１０μｍの木質系粉末状活性炭５０部、水酸化アルミニウム４２部、バインダーとしてのアルギン酸ソーダ８部を混合してペースト状とした後、シート基材の両面にコート加工し、目付量８０ｇ／ｍ２、厚さ０．１７ｍｍの活性炭担持シートを製造した。続いて、得られた活性炭担持シートを、コルゲート加工機を用いてピッチ２．６ｍｍ、山高さ１．２ｍｍ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７５段に重ね、縦横それぞれ９０ｍｍの積層体を作り、層長方向を切断加工して層長１０ｍｍ、空隙率６３％のハニカム型活性炭担持フィルターＡを得た。この活性炭担持フィルターＡのトルエン吸着量は８．６ｍｇ／ｃｃであった。
Example 1
60 parts of aluminum hydroxide, 20 parts of aramid pulp, 10 parts of polyester, and 10 parts of polyvinyl alcohol as a binder are mixed to form a slurry, and this is made into a paper using a Yankee type wet paper machine (weight per unit area 20 g / m 2 , thickness 0). 0.08 mm). Using the resulting papermaking as a sheet base material, a specific surface area of 1200 m 2 / g, an average particle size of 10 μm wood-based powdered activated carbon, 50 parts of aluminum hydroxide, 42 parts of aluminum hydroxide and 8 parts of sodium alginate as a binder were mixed to form a paste After that, the both sides of the sheet base material were coated to produce an activated carbon-supported sheet having a basis weight of 80 g / m 2 and a thickness of 0.17 mm. Subsequently, the obtained activated carbon-carrying sheet was formed into a single cardboard sheet having a pitch of 2.6 mm and a peak height of 1.2 mm using a corrugating machine. The single-stage cardboard sheets were stacked in 75 stages to form a laminate of 90 mm in length and width, and cut in the layer length direction to obtain a honeycomb-type activated carbon-supported filter A having a layer length of 10 mm and a porosity of 63%. The activated carbon-supported filter A had a toluene adsorption amount of 8.6 mg / cc.
厚み３０μｍ、幅１０ｍｍのテープ状のアルミ箔をピッチ２ｍｍ、山高さ０．８ｍｍに賦形ロールに通して波形に加工した。この波形のアルミ箔と平らなアルミ箔とを交互に積層し、縦横それぞれ９０ｍｍの積層体を作り、治具で固定し、ハニカム基材を製造した。このハニカム基材を水溶性アクリル樹脂中に浸漬し、樹脂より引き上げた後に、余分の樹脂を吹き落とした。そして、１８０℃で１５分間樹脂を乾燥し、ハニカム基材の固着化を行った。このアクリル樹脂で固着されたハニカム基材に、比表面積１５０ｍ２／ｇ、平均粒径１５μｍのマンガン酸化物３５部、比表面積１２００ｍ２／ｇ、平均粒径１０μｍの粉末状活性炭１５部、水酸化アルミニウム４２部、バインダーとしてのアルギン酸ソーダ８部を混合してペースト状とした後、ハニカム基材の全面にコート加工し、コート量１２０ｍｇ／ｃｃ、空隙率７０％のハニカム型金属酸化物担持フィルターＣを得た。この金属酸化物担持フィルターＣの酢酸吸着量は４．８ｍｇ／ｃｃであった。 A tape-like aluminum foil having a thickness of 30 μm and a width of 10 mm was processed into a corrugated shape by passing it through a shaping roll at a pitch of 2 mm and a peak height of 0.8 mm. The corrugated aluminum foil and the flat aluminum foil were alternately laminated to form a laminate of 90 mm in length and width, and fixed with a jig to manufacture a honeycomb substrate. This honeycomb substrate was immersed in a water-soluble acrylic resin, pulled up from the resin, and then the excess resin was blown off. Then, the resin was dried at 180 ° C. for 15 minutes to fix the honeycomb substrate. To this honeycomb substrate fixed with an acrylic resin, 35 parts of manganese oxide having a specific surface area of 150 m 2 / g and an average particle diameter of 15 μm, 15 parts of powdered activated carbon having a specific surface area of 1200 m 2 / g and an average particle diameter of 10 μm, hydroxylated After mixing 42 parts of aluminum and 8 parts of sodium alginate as a binder to form a paste, the entire surface of the honeycomb base material was coated, and the honeycomb type metal oxide-carrying filter C having a coating amount of 120 mg / cc and a porosity of 70% was applied. Got. The acetic acid adsorption amount of this metal oxide-carrying filter C was 4.8 mg / cc.
排気経路の上流側に活性炭担持フィルターＡを、下流側に金属酸化物担持フィルターＣを設置する構成で、両者を接するように積層し、フィルター端部に幅２０ｍｍ、厚み３ｍｍの両面テープ付きウレタンフォームを巻き付け、一体型のハニカム型オゾンフィルターを作製した。 An activated carbon-carrying filter A is installed on the upstream side of the exhaust path, and a metal oxide-carrying filter C is installed on the downstream side. They are laminated so that they are in contact with each other, and the urethane foam with double-sided tape is 20 mm wide and 3 mm thick at the filter end. Was wound to produce an integrated honeycomb type ozone filter.
（実施例２）
排気経路の上流側に活性炭担持フィルターＡを、下流側に金属酸化物担持フィルターＣを設置する構成で、各々に幅１０ｍｍ、厚み３ｍｍの両面テープ付きウレタンフォーム巻き付けた。活性炭担持フィルターＡと金属酸化物担持フィルターＣの設置間隔を２０ｍｍとし、分割型のハニカム型オゾンフィルターを作製した。
(Example 2)
The activated carbon-carrying filter A was installed on the upstream side of the exhaust path, and the metal oxide-carrying filter C was installed on the downstream side, and each was wound with urethane foam with a double-sided tape having a width of 10 mm and a thickness of 3 mm. The installation interval between the activated carbon-carrying filter A and the metal oxide-carrying filter C was 20 mm, and a split-type honeycomb type ozone filter was produced.
（比較例１）
排気経路に金属酸化物担持フィルターＣのみを設置する構成で、フィルター端部に幅１０ｍｍ、厚み３ｍｍの両面テープ付きウレタンフォーム巻き付けたハニカム型オゾンフィルターを作製した。
(Comparative Example 1)
A honeycomb type ozone filter having a configuration in which only the metal oxide-carrying filter C was installed in the exhaust path and a urethane foam with a double-sided tape having a width of 10 mm and a thickness of 3 mm was wound around the end of the filter was produced.
（比較例２）
排気経路の上流側に金属酸化物担持フィルターＣを、下流側に活性炭担持フィルターＡを設置する構成で、両者を接するように積層したオゾンフィルターを作製した。フィルター端部に幅２０ｍｍ、厚み３ｍｍの両面テープ付きウレタンフォーム巻き付け、一体型のハニカム型オゾンフィルターを作製した。
(Comparative Example 2)
An ozone filter was produced in which the metal oxide-carrying filter C was installed on the upstream side of the exhaust path and the activated carbon-carrying filter A was installed on the downstream side, and the layers were laminated so as to contact each other. A urethane foam with a double-sided tape having a width of 20 mm and a thickness of 3 mm was wound around the end of the filter to produce an integrated honeycomb type ozone filter.
（比較例３）
実施例１のシート基材を用い、比表面積１２００ｍ２／ｇ、平均粒径１０μｍの木質系粉末状活性炭５０部、水酸化アルミニウム４２部、バインダーとしてのアルギン酸ソーダ８部を混合してペースト状とした後、シート基材の両面にコート加工し、目付量５０ｇ／ｍ２、厚さ０．１３ｍｍの活性炭担持シートを製造した。続いて、得られた活性炭担持シートを、コルゲート加工機を用いてピッチ２．６ｍｍ、山高さ１．２ｍｍ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７５段に重ね、縦横それぞれ９０ｍｍの積層体を作り、層長方向を切断加工して層長１０ｍｍ、空隙率７１％のハニカム型活性炭担持フィルターＢを得た。この活性炭担持フィルターＢのトルエン吸着量は３．８ｍｇ／ｃｃであった。
(Comparative Example 3)
Using the sheet base material of Example 1, 50 parts of wood-based powdered activated carbon having a specific surface area of 1200 m 2 / g and an average particle size of 10 μm, 42 parts of aluminum hydroxide, and 8 parts of sodium alginate as a binder were mixed to form a paste. After that, the both sides of the sheet substrate were coated to produce an activated carbon-supporting sheet having a basis weight of 50 g / m 2 and a thickness of 0.13 mm. Subsequently, the obtained activated carbon-carrying sheet was formed into a single cardboard sheet having a pitch of 2.6 mm and a peak height of 1.2 mm using a corrugating machine. The single-stage cardboard sheets were stacked in 75 stages to form a 90 mm vertical and horizontal laminate, and the layer length direction was cut to obtain a honeycomb-type activated carbon-supported filter B having a layer length of 10 mm and a porosity of 71%. The activated carbon-supported filter B had a toluene adsorption amount of 3.8 mg / cc.
排気経路の上流側に活性炭担持フィルターＢを、下流側に金属酸化物担持フィルターＣを設置する構成で、両者を接するように積層し、フィルター端部に幅２０ｍｍ、厚み３ｍｍの両面テープ付きウレタンフォーム巻き付け、一体型のハニカム型オゾンフィルターを作製した。 An activated carbon-carrying filter B is installed on the upstream side of the exhaust path, and a metal oxide-carrying filter C is installed on the downstream side. The urethane foam is laminated so that they are in contact with each other, and the end of the filter is 20 mm wide and 3 mm thick. A wound and integrated honeycomb type ozone filter was produced.
（比較例４）
実施例１のアクリル樹脂で固着されたハニカム基材に、比表面積１５０ｍ２／ｇ、平均粒径１５μｍのマンガン酸化物４５部、比表面積１２００ｍ２／ｇ、平均粒径１０μｍの粉末状活性炭５部、水酸化アルミニウム４２部、バインダーとしてのアルギン酸ソーダ８部を混合してペースト状とした後、ハニカム基材の全面にコート加工し、コート量１２０ｍｇ／ｃｃ、空隙率７０％のハニカム型金属酸化物担持フィルターＤを得た。この金属酸化物担持フィルターＤの酢酸吸着量は１．６ｍｇ／ｃｃであった。
(Comparative Example 4)
To honeycomb substrate fixed with acrylic resin of Example 1, 45 parts of manganese oxide with specific surface area of 150 m 2 / g, average particle diameter of 15 μm, 5 parts of powdered activated carbon with specific surface area of 1200 m 2 / g, average particle diameter of 10 μm Then, 42 parts of aluminum hydroxide and 8 parts of sodium alginate as a binder were mixed to form a paste, and then coated on the entire surface of the honeycomb substrate to form a honeycomb type metal oxide having a coating amount of 120 mg / cc and a porosity of 70% A supported filter D was obtained. The metal oxide-carrying filter D had an acetic acid adsorption amount of 1.6 mg / cc.
排気経路の上流側に活性炭担持フィルターＡを、下流側に金属酸化物担持フィルターＤを下流側に接するように積層し、フィルター端部に幅２０ｍｍ、厚み３ｍｍの両面テープ付きウレタンフォーム巻き付け、一体型のハニカム型オゾンフィルターを作製した。 An activated carbon-carrying filter A is laminated on the upstream side of the exhaust path, and a metal oxide-carrying filter D is laminated on the downstream side so as to be in contact with the downstream side, and a urethane foam with a double-sided tape having a width of 20 mm and a thickness of 3 mm is wound around the filter end. A honeycomb type ozone filter was prepared.
上述したオゾンフィルターについて、先に説明した方法により圧力損失、オゾン除去率、オゾンフィルターの臭気確認の評価を実施した。結果を圧力損失、オゾン除去率を表１に、オゾンフィルターの臭気確認を表２に示す。 About the ozone filter mentioned above, evaluation of the pressure loss, the ozone removal rate, and the odor confirmation of an ozone filter was implemented by the method demonstrated previously. The pressure loss and ozone removal rate are shown in Table 1, and the odor confirmation of the ozone filter is shown in Table 2.
本発明は以上述べたように画像形成装置内で生ずるオゾンを除去するために、排気経路に装着するオゾンフィルターにおいて、上流側にトルエン吸着量が５ｍｇ／ｃｃ以上の活性炭担持フィルターを設置し、下流側に酢酸吸着量が２．５ｍｇ／ｃｃ以上の金属酸化物担持フィルターを設置したオゾンフィルターを提供するものであり、産業界に寄与することが大である。 In the present invention, in order to remove ozone generated in the image forming apparatus as described above, an activated carbon-carrying filter having a toluene adsorption amount of 5 mg / cc or more is installed on the upstream side in the ozone filter attached to the exhaust path, and the downstream side. The present invention provides an ozone filter having a metal oxide-carrying filter having an acetic acid adsorption amount of 2.5 mg / cc or more on the side, and greatly contributes to the industry.
１：ピッチ幅
２：山高さ
３：縦
４：横
５：層長
1: Pitch width 2: Mountain height 3: Vertical 4: Horizontal 5: Layer length
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| US9034274B2 (en) * | 2011-03-23 | 2015-05-19 | Toyota Jidosha Kabushiki Kaisha | Vehicular air cleaner |
| WO2016167172A1 (en) * | 2015-04-14 | 2016-10-20 | 東洋紡株式会社 | Deodorizing purification filter |
| CN111315477A (en) * | 2017-11-10 | 2020-06-19 | 东洋纺株式会社 | Filter |
| JP7081776B2 (en) * | 2018-02-28 | 2022-06-07 | 住江織物株式会社 | Ozone, acetaldehyde, toluene removal filter |
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| JPS5933409B2 (en) * | 1977-01-12 | 1984-08-15 | 武田薬品工業株式会社 | Method for treating gas containing odor components and ozone |
| JPS60248219A (en) * | 1984-05-22 | 1985-12-07 | Ricoh Co Ltd | Ozone decomposition device |
| JPH0729052B2 (en) * | 1988-05-18 | 1995-04-05 | ニチアス株式会社 | Method for manufacturing activated carbon-supported honeycomb structure |
| JPH02253848A (en) * | 1989-03-27 | 1990-10-12 | Mitsubishi Kasei Corp | Catalyst for decomposition of ozone |
| JPH02273764A (en) * | 1989-04-17 | 1990-11-08 | Canon Inc | Image forming device |
| JPH03146971A (en) * | 1989-11-02 | 1991-06-21 | Ricoh Co Ltd | Image forming device |
| JPH03193117A (en) * | 1989-12-22 | 1991-08-22 | Sakai Chem Ind Co Ltd | Ozone decomposition |
| JPH03213145A (en) * | 1990-01-11 | 1991-09-18 | Sakai Chem Ind Co Ltd | Ozone decomposing catalyst |
| JP2925625B2 (en) * | 1990-02-15 | 1999-07-28 | クラレケミカル株式会社 | Air purification filter |
| JP3072521B2 (en) * | 1990-04-24 | 2000-07-31 | 株式会社キャタラー | Method for producing ozone decomposition catalyst |
| JPH04187215A (en) * | 1990-11-19 | 1992-07-03 | Sakai Chem Ind Co Ltd | Deodorization method |
| JP3043474B2 (en) * | 1991-06-24 | 2000-05-22 | 株式会社神戸製鋼所 | Honeycomb molded body |
| JPH0691957B2 (en) * | 1991-07-19 | 1994-11-16 | ニチアス株式会社 | Ozone filter and its manufacturing method |
| JPH05168854A (en) * | 1991-12-24 | 1993-07-02 | Mitsubishi Heavy Ind Ltd | Ozone decomposing device |
| JP2709784B2 (en) * | 1993-03-26 | 1998-02-04 | ニチアス株式会社 | Catalyst unit for gas phase reaction |
| JP4670118B2 (en) * | 1998-05-08 | 2011-04-13 | 東洋紡績株式会社 | Laminated gas adsorbing sheet and air cleaning filter using the same |
| JP2002214986A (en) * | 2001-01-23 | 2002-07-31 | Ricoh Co Ltd | Image forming device |
| JP2004313880A (en) * | 2003-04-14 | 2004-11-11 | Toyobo Co Ltd | Ozone filter |
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