JP5747495B2 - Gas adsorption sheet and air purification filter - Google Patents
Gas adsorption sheet and air purification filter Download PDFInfo
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- JP5747495B2 JP5747495B2 JP2010280254A JP2010280254A JP5747495B2 JP 5747495 B2 JP5747495 B2 JP 5747495B2 JP 2010280254 A JP2010280254 A JP 2010280254A JP 2010280254 A JP2010280254 A JP 2010280254A JP 5747495 B2 JP5747495 B2 JP 5747495B2
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- 238000001179 sorption measurement Methods 0.000 title claims description 48
- 238000004887 air purification Methods 0.000 title claims description 18
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- 238000000034 method Methods 0.000 claims description 9
- XFZRQAZGUOTJCS-UHFFFAOYSA-N phosphoric acid;1,3,5-triazine-2,4,6-triamine Chemical compound OP(O)(O)=O.NC1=NC(N)=NC(N)=N1 XFZRQAZGUOTJCS-UHFFFAOYSA-N 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 229920000877 Melamine resin Polymers 0.000 claims 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims 1
- 239000007789 gas Substances 0.000 description 69
- 239000003063 flame retardant Substances 0.000 description 36
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 34
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- 150000001339 alkali metal compounds Chemical class 0.000 description 8
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- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- CEDDGDWODCGBFQ-UHFFFAOYSA-N carbamimidoylazanium;hydron;phosphate Chemical compound NC(N)=N.OP(O)(O)=O CEDDGDWODCGBFQ-UHFFFAOYSA-N 0.000 description 4
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- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
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- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
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- 239000004925 Acrylic resin Substances 0.000 description 1
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
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- 241000196324 Embryophyta Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 240000000907 Musa textilis Species 0.000 description 1
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- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
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- 241000533293 Sesbania emerus Species 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- DHAHRLDIUIPTCJ-UHFFFAOYSA-K aluminium metaphosphate Chemical compound [Al+3].[O-]P(=O)=O.[O-]P(=O)=O.[O-]P(=O)=O DHAHRLDIUIPTCJ-UHFFFAOYSA-K 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical class [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
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- 238000005520 cutting process Methods 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
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- 239000012796 inorganic flame retardant Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 description 1
- 239000004137 magnesium phosphate Substances 0.000 description 1
- 229960002261 magnesium phosphate Drugs 0.000 description 1
- 229910000157 magnesium phosphate Inorganic materials 0.000 description 1
- 235000010994 magnesium phosphates Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
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- XNGIFLGASWRNHJ-UHFFFAOYSA-M phthalate(1-) Chemical compound OC(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-M 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
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- 229910052700 potassium Inorganic materials 0.000 description 1
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- 239000011592 zinc chloride Substances 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Separation Of Gases By Adsorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
本発明は、ガス吸着用シートおよびそれを用いたハニカム型空気清浄フィルターに関するものである。くわしくは、ハニカム型空気清浄フィルターにした際の接着性が良好で、さらに、揮発性有機化合物やオゾンの除去に優れ、かつ難燃性を有するガス吸着用シートおよびそれを用いたハニカム型空気清浄フィルターに関するものである。 The present invention relates to a gas adsorbing sheet and a honeycomb type air purifying filter using the same. Specifically, it has good adhesion when it is made into a honeycomb type air purification filter, and also has excellent flame retardant properties for removing volatile organic compounds and ozone, and a honeycomb type air purification using the same. It relates to filters.
コピー機、プリンター、多機能OA機、コンピュータ、プロジェクター、POD印刷機等の電子機器は、近年集積化、小型化が進み、機器内部に熱がこもるのを避けるために、ファン等による排熱が欠かせなくなってきている。そして、インク、トナー等といった印字の際に用いられる成分、電子機器の本体を構成するプラスチック、および、各種接合部に使用されているゴム等に含まれている各種成分がガス化し、有害ガス成分として排熱と共に室内へと排出されている。また、コピー機、レーザープリンター等では高電圧を使用するため、前記ガス成分だけでなく、オゾンといった有害ガス成分も排出されている。近年、環境問題への意識の高まりから、有害ガス成分に関して、排出規制が行われるようになった。例えば、ドイツでは、「BAM(ブルーエンジェルマーク)」という環境ラベルが制定されており、電子機器毎に果たすべき環境性能基準が定められている。 In recent years, electronic devices such as copiers, printers, multi-function OA machines, computers, projectors, and POD printers have been increasingly integrated and miniaturized. It is becoming indispensable. In addition, various components contained in components such as ink, toner, etc. used for printing, plastics constituting the main body of electronic equipment, rubber used in various joints, etc. are gasified, and harmful gas components It is discharged into the room along with exhaust heat. In addition, since a high voltage is used in a copying machine, a laser printer, and the like, not only the gas components but also harmful gas components such as ozone are discharged. In recent years, due to increased awareness of environmental issues, emission regulations have been implemented for harmful gas components. For example, in Germany, an environmental label “BAM (Blue Angel Mark)” has been established, and environmental performance standards to be achieved for each electronic device are defined.
電子機器から排出される有害ガス成分を低減する目的で、前記電子機器内部に空気清浄フィルターが組み込まれている。前記空気清浄フィルターは電子機器内部に組み込まれるため、有害ガス成分の除去に優れるだけではなく、難燃規格UL(Underwriters Laboratories Inc.)の取得が必須である(非特許文献1参照)。 In order to reduce harmful gas components discharged from the electronic device, an air cleaning filter is incorporated in the electronic device. Since the air purifying filter is incorporated in an electronic device, it not only excels in removing harmful gas components, but it is essential to obtain a flame retardant standard UL (Underwriters Laboratories Inc.) (see Non-Patent Document 1).
レーザープリンターをはじめとする電子機器や、種々の空調機器等に組み込んでオゾンおよび揮発性有機化合物を除去するための空気清浄フィルターについてはよく知られている。特許文献1では、特定細孔の細孔容積を規定した活性炭に水溶性難燃剤を含有させたハニカム型空気清浄フィルターを提案した。難燃剤を含有させることで難燃性能の付与は行えたが、水溶性難燃剤を用いることで、活性炭の細孔の一部を閉塞し、揮発性有機化合物やオゾンガスの除去性能を低下させる問題を有していた。 Air purifying filters for removing ozone and volatile organic compounds by being incorporated in electronic devices such as laser printers and various air conditioning devices are well known. Patent Document 1 has proposed a honeycomb-type air cleaning filter in which a water-soluble flame retardant is contained in activated carbon that defines the pore volume of specific pores. Although it was possible to impart flame retardancy by including a flame retardant, the use of a water-soluble flame retardant obstructs some of the pores of the activated carbon and reduces the removal performance of volatile organic compounds and ozone gas. Had.
特許文献1の課題を解決するために、特許文献2、3では難燃剤を水溶性から難水溶性に変更し、活性炭の細孔が閉塞しない難燃化処方を提案した。活性炭の本来のオゾンおよび揮発性有機化合物の除去を維持し、難燃性能の付与を行えたが、シート基材に活性炭、難水溶性難燃剤を塗布した多層構造であったため、ハニカム型空気清浄フィルターにした際に、波型シートと平型シートの接着性が悪く、生産性および取り扱い性に劣るものであった。
In order to solve the problem of Patent Document 1,
上述のとおり、コピー機、プリンター、多機能OA機、コンピュータ、プロジェクター、POD印刷機等の電子機器に組み込む空気清浄フィルターに関して、揮発性有機化合物、オゾンなどの有害ガス成分を除去性能、難燃性能、フィルターの生産性および取り扱い性を全て良好なものが得られていなかった。 As mentioned above, air purification filters built into electronic devices such as copiers, printers, multifunction OA machines, computers, projectors, POD printers, etc., remove toxic organic compounds, ozone and other harmful gas components, and flame retardancy No good filter productivity and handleability were obtained.
本発明は、上記従来技術の現状に鑑み創案されたものであり、コピー機、プリンター、多機能OA機、コンピュータ、プロジェクター、POD印刷機等の電子機器に組み込んで、有害ガス成分を除去することができ、しかも燃焼時に十分な難燃性を有し、ハニカム型空気清浄フィルターの接着性も良好であるガス吸着用シートおよび空気清浄フィルターを提供することを目的とする。 The present invention was devised in view of the above-described state of the art, and is incorporated into electronic devices such as copiers, printers, multi-function OA machines, computers, projectors, and POD printers to remove harmful gas components. An object of the present invention is to provide a gas adsorption sheet and an air purification filter that can be fired and that have sufficient flame retardancy during combustion and that have good adhesion to the honeycomb type air purification filter.
本発明者は、上記目的を達成するために鋭意研究した結果、一層構造のシートに活性炭、難水溶性難燃剤を含有させることで、本発明の完成に到達した。
すなわち、本発明は以下の通りである。
As a result of intensive studies to achieve the above object, the present inventor has completed the present invention by incorporating activated carbon and a hardly water-soluble flame retardant into a single-layered sheet.
That is, the present invention is as follows.
(1)活性炭、難水溶性難燃剤、フィブリル化繊維、およびバインダー繊維を含む一層構造のガス吸着用シート。
(2)難水溶性難燃剤が、リン酸メラミン、またはリン酸アルミニウムである上記(1)に記載のガス吸着用シート。
(3)(1)または(2)に記載のガス吸着用シートを、ハニカム形状に加工した空気清浄フィルター。
(1) A gas adsorption sheet having a single layer structure including activated carbon, a hardly water-soluble flame retardant, fibrillated fibers, and binder fibers.
(2) The gas adsorption sheet according to (1), wherein the hardly water-soluble flame retardant is melamine phosphate or aluminum phosphate.
(3) An air cleaning filter obtained by processing the gas adsorption sheet according to (1) or (2) into a honeycomb shape.
本発明のガス吸着用シートおよび空気清浄フィルターは、オゾンおよび揮発性有機化合物を除去することができ、しかも燃焼時に十分な難燃性を有し、ハニカム型フィルターの接着性も良好であるガス吸着用シートおよび空気清浄フィルターを提供できるという利点がある。 The gas adsorption sheet and the air purification filter of the present invention can remove ozone and volatile organic compounds, have sufficient flame retardancy during combustion, and have good adhesion to the honeycomb filter. There is an advantage that it is possible to provide a safety sheet and an air cleaning filter.
以下、本発明のガス吸着用シートおよび空気清浄フィルターを詳細に説明する。本発明のガス吸着用シートは、図1に示すように、活性炭、難水溶性難燃剤、フィブリル化繊維、およびバインダー繊維を少なくとも含む一層構造のシートであり、このシートをハニカム型空気清浄フィルターにしたことを特徴とする。 Hereinafter, the gas adsorption sheet and the air purifying filter of the present invention will be described in detail. As shown in FIG. 1, the gas adsorption sheet of the present invention is a single-layered sheet containing at least activated carbon, a hardly water-soluble flame retardant, a fibrillated fiber, and a binder fiber. This sheet is used as a honeycomb type air purification filter. It is characterized by that.
本発明のガス吸着用シートの製法は、特に限定はなく、公知のシート化方法により作製できるが、よりシートの高密度化が行える湿式抄紙法が好ましい。湿式抄紙法は、水に原材料を分散させて、網で濾過し、乾燥する製造方法である。 The production method of the gas adsorption sheet of the present invention is not particularly limited and can be produced by a known sheeting method, but a wet papermaking method capable of increasing the density of the sheet is preferable. The wet papermaking method is a manufacturing method in which raw materials are dispersed in water, filtered through a net, and dried.
本発明で使用する活性炭としては、特に限定はなく、公知の活性炭が使用でき、かかる活性炭は、例えば木質、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る。 The activated carbon used in the present invention is not particularly limited, and known activated carbon can be used. Examples of the activated carbon include wood, fruit husk (coconut husk, coconut husk, rice husk, coffee beans, etc.), cellulose, lignin, It can be obtained by using plant raw materials such as pulp, mineral raw materials such as lignite, lignite, peat, anthracite, petroleum sludge, etc., and chemical activation using zinc chloride or gas activation using steam. .
本発明で使用する活性炭の形状は、粉末状、粒状、繊維状のいずれであってもよいが、ガス吸着用シート中での密度を上げるには、粉末状や粒状のものが好ましい。 The activated carbon used in the present invention may be in the form of powder, granule, or fiber, but in order to increase the density in the gas adsorption sheet, powder or granule is preferred.
粉粒状活性炭の粒径としては、1〜100μmが好ましく、より好ましくは1〜80μmである。また、繊維表面に活性炭を固着させるためには、1〜30μmの範囲が好ましい。粒径が1μm未満の活性炭は、飛散や凝着など取り扱い性が悪く、他方100μmより大きい活性炭ではガス吸着用シートの薄層化が困難であり、また当該シートからの活性炭の剥離を招くおそれがある。 As a particle size of a granular activated carbon, 1-100 micrometers is preferable, More preferably, it is 1-80 micrometers. Moreover, in order to fix activated carbon to the fiber surface, the range of 1-30 micrometers is preferable. Activated carbon having a particle size of less than 1 μm has poor handleability such as scattering and adhesion, and on the other hand, activated carbon having a particle size of more than 100 μm makes it difficult to make a thin layer for gas adsorption, and may cause the activated carbon to peel from the sheet. is there.
本発明で使用する活性炭の比表面積は、800〜2,000m2/gが好ましく、1,000〜1,600m2/gがより好ましい。活性炭の比表面積が800m2/gより小さいと、揮発性有機化合物およびオゾンの除去性能が低下するおそれがある。一方、活性炭の比表面積が2,000m2/gより大きいと、活性炭の硬度が低下し、シートおよびハニカム製造時のプレス工程で粉化するおそれがある。 The specific surface area of the activated carbon used in the present invention is preferably 800~2,000m 2 / g, 1,000~1,600m 2 / g is more preferable. If the specific surface area of the activated carbon is smaller than 800 m 2 / g, the removal performance of volatile organic compounds and ozone may be lowered. On the other hand, when the specific surface area of the activated carbon is larger than 2,000 m 2 / g, the hardness of the activated carbon is lowered, and there is a possibility that it may be pulverized in a pressing process at the time of manufacturing a sheet and a honeycomb.
本発明において、ガス吸着用シートに含まれる活性炭量は5〜50g/m2が好ましい。より好ましくは、7〜45g/m2であり、さらに好ましくは10〜40g/m2である。5g/m2未満の場合は、十分な揮発性有機化合物およびオゾンの除去性能が得られず、他方50g/m2を越える場合は、ガス吸着用シートの厚みが厚くなるため加工性が悪くなり、またハニカム形状に加工した場合に開口率が小さくなって通過する空気の圧力損失が大きくなるといった問題を生ずるおそれがある。 In the present invention, the amount of activated carbon contained in the gas adsorption sheet is preferably 5 to 50 g / m 2 . More preferably, it is 7-45 g / m < 2 >, More preferably, it is 10-40 g / m < 2 >. If it is less than 5 g / m 2 , sufficient removal performance of volatile organic compounds and ozone cannot be obtained. On the other hand, if it exceeds 50 g / m 2 , the gas adsorbing sheet becomes thick and workability deteriorates. In addition, when processed into a honeycomb shape, there is a possibility that the aperture ratio becomes small and the pressure loss of the passing air becomes large.
本発明において、ガス吸着用シートに含まれる活性炭の全含有量は、ガス吸着用シートに対して10〜80重量%が好ましい。より好ましくは、20〜70重量%である。活性炭の含有率が10重量%未満の場合、揮発性有機化合物およびオゾンの除去に機能する活性炭量が不足するため、除去性能が十分にはなされない場合がある。一方80重量%を越える場合、ガス吸着用シートの強度が低下し、加工性が悪くなることがある。 In the present invention, the total content of activated carbon contained in the gas adsorption sheet is preferably 10 to 80% by weight with respect to the gas adsorption sheet. More preferably, it is 20 to 70% by weight. When the activated carbon content is less than 10% by weight, the amount of activated carbon that functions to remove volatile organic compounds and ozone is insufficient, and thus the removal performance may not be sufficient. On the other hand, when it exceeds 80% by weight, the strength of the gas adsorbing sheet is lowered, and the workability may be deteriorated.
本発明に使用する活性炭に、アルカリ金属化合物およびアルカリ土類金属化合物を添着しておいてもよい。アルカリ金属化合物およびアルカリ土類金属化合物を活性炭に添着することで、オゾン、酸性ガスの長寿命化が行える。使用するアルカリ金属化合物およびアルカリ土類金属化合物としては、それぞれアルカリ金属およびアルカリ土類金属を含有する無機または有機化合物であれば特に限定されるものではなく、例えば、アルカリ金属化合物としては、ナトリウム、カリウム、リチウムなどのアルカリ金属類の水酸化物;酸化物;炭酸塩、炭酸水素塩、酢酸塩、シュウ酸塩、リン酸塩、硫酸塩、こはく酸、フタル酸、フタル酸水素などの水溶性の塩;ハロゲン化物などが挙げられる。またアルカリ土類金属化合物としては、カルシウム、マグネシウム、バリウムなどのアルカリ土類金属の水酸化物;酸化物;炭酸塩、酢酸塩、シュウ酸塩、リン酸塩などの水溶性の塩;ハロゲン化物などが挙げられる。使用に当たってはこれらのアルカリ金属化合物およびアルカリ土類金属化合物の一種または二種以上が使用できる。アルカリ金属化合物やアルカリ土類金属化合物を添着する方法としては、シート化する前に活性炭に添着しておく方法、シート化後にスプレー、浸漬により添着する方法などが挙げられる。 The activated carbon used in the present invention may be impregnated with an alkali metal compound and an alkaline earth metal compound. By attaching an alkali metal compound and an alkaline earth metal compound to activated carbon, the lifetime of ozone and acid gas can be extended. The alkali metal compound and alkaline earth metal compound to be used are not particularly limited as long as they are inorganic or organic compounds containing alkali metal and alkaline earth metal, respectively. Examples of the alkali metal compound include sodium, Hydroxides of alkali metals such as potassium and lithium; oxides; carbonates, bicarbonates, acetates, oxalates, phosphates, sulfates, succinic acid, phthalic acid, hydrogen phthalate, etc. Salts thereof; halides and the like. Alkaline earth metal compounds such as calcium, magnesium and barium hydroxides; oxides; water-soluble salts such as carbonates, acetates, oxalates and phosphates; halides Etc. In use, one or more of these alkali metal compounds and alkaline earth metal compounds can be used. Examples of the method of attaching the alkali metal compound or alkaline earth metal compound include a method of attaching to activated carbon before forming into a sheet, and a method of attaching by spraying or dipping after forming into a sheet.
本発明において、アルカリ金属化合物およびアルカリ土類金属化合物の添加量は、ガス吸着用シート中の活性炭に対して10〜100重量%が好ましい。より好ましくは、15〜95重量%であり、さらに好ましくは20〜90重量%である。アルカリ金属化合物およびアルカリ土類金属化合物の含有量が10重量%より少ないとオゾン除去効果が小さくなるという問題があり、100重量%より多いと、オゾン除去性能は上がるが難燃性に劣るという問題がある。 In the present invention, the addition amount of the alkali metal compound and the alkaline earth metal compound is preferably 10 to 100% by weight with respect to the activated carbon in the gas adsorption sheet. More preferably, it is 15-95 weight%, More preferably, it is 20-90 weight%. If the content of the alkali metal compound and alkaline earth metal compound is less than 10% by weight, there is a problem that the effect of removing ozone is reduced. If the content is more than 100% by weight, the ozone removal performance is improved but the flame retardancy is inferior. There is.
本発明で使用する難水溶性難燃剤とは、20℃の水への溶解度が1重量%以下の難燃剤であり、例えば、メタリン酸アルミニウム、リン酸メラミン、リン酸マグネシウム、縮合リン酸アミドなどのリン系難燃剤;水酸化アルミニウム、水酸化マグネシウムなどの無機系難燃剤が使用できる。これらの難燃剤を一種または二種以上を併用してもよい。 The poorly water-soluble flame retardant used in the present invention is a flame retardant having a solubility in water at 20 ° C. of 1% by weight or less, such as aluminum metaphosphate, melamine phosphate, magnesium phosphate, condensed phosphate amide, etc. An inorganic flame retardant such as aluminum hydroxide or magnesium hydroxide can be used. One or more of these flame retardants may be used in combination.
本発明において、ガス吸着用シート中の難水溶性難燃剤の添加量は、ガス吸着用シート中の活性炭に対して8〜100重量%であることが好ましい。より好ましくは、10〜80重量%であり、さらに好ましくは12〜60重量%である。難燃剤の含有量が8重量%より少ないと、十分な難燃効果が得られず、ULの定める規格を満足することができないという問題があり、100重量%より多いと活性炭上のオゾン分解活性点が減少するため、ガス吸着用シートのオゾン除去性能が低下するという問題がある。 In the present invention, the amount of the hardly water-soluble flame retardant added in the gas adsorption sheet is preferably 8 to 100% by weight with respect to the activated carbon in the gas adsorption sheet. More preferably, it is 10-80 weight%, More preferably, it is 12-60 weight%. If the content of the flame retardant is less than 8% by weight, there is a problem that sufficient flame retardant effect cannot be obtained and the standard specified by UL cannot be satisfied. Since the number of points decreases, there is a problem that the ozone removal performance of the gas adsorption sheet is lowered.
本発明で使用する難水溶性難燃剤に加えて、リン酸グアニジン、リン酸アンモニウムなどの水溶性難燃剤も使用してもよい。水溶性難燃剤の添加量は、ガス吸着性シートの活性炭に対して、0.2〜5重量%であることが好ましい。より好ましくは、0.5〜4重量%であり、さらに好ましくは1〜3重量%である。水溶性難燃剤の含有量が0.2重量%より少ないと、水溶性難燃剤を添加したことによる難燃効果が得られず、5重量%より多いと活性炭上のオゾン分解活性点が減少するため、ガス吸着用シートのオゾン除去性能が低下するという問題がある。 In addition to the hardly water-soluble flame retardant used in the present invention, water-soluble flame retardants such as guanidine phosphate and ammonium phosphate may be used. The addition amount of the water-soluble flame retardant is preferably 0.2 to 5% by weight with respect to the activated carbon of the gas adsorbing sheet. More preferably, it is 0.5-4 weight%, More preferably, it is 1-3 weight%. If the content of the water-soluble flame retardant is less than 0.2% by weight, the flame retardant effect due to the addition of the water-soluble flame retardant cannot be obtained, and if it exceeds 5% by weight, the ozonolysis active sites on the activated carbon decrease. Therefore, there exists a problem that the ozone removal performance of the sheet | seat for gas adsorption falls.
本発明で使用するフィブリル化繊維としては、例えば、マニラ麻パルプ、NBKP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、セラミックパルプなどのフィブリル化できる繊維が挙げられる。粉末状の活性炭や難水溶性難燃剤を用いる場合は、繊維表面積が大きくなるフィブリル化繊維を用いる方が粉末状物質の定着性が良くなる。フィブリル繊維の補強用として、レーヨンやポリエチレン、ポリエステル、ポリプロピレン、セラミック繊維、ガラス繊維等の短繊維を使用してもよい。 Examples of the fibrillated fibers used in the present invention include fibers that can be fibrillated such as Manila hemp pulp, NBKP pulp, polyolefin-based pulp, acrylic pulp, aramid pulp, and ceramic pulp. When powdered activated carbon or a hardly water-soluble flame retardant is used, the use of fibrillated fibers having a large fiber surface area improves the fixability of the powdered material. For reinforcing the fibril fibers, short fibers such as rayon, polyethylene, polyester, polypropylene, ceramic fibers, and glass fibers may be used.
本発明において、フィブリル化繊維の混合比率は、ガス吸着用シート中の活性炭に対して10〜50重量%が好ましい。より好ましくは、15〜45重量%であり、さらに好ましくは20〜40重量%である。フィブリル化繊維の混合比率が10重量%より少ないと粉末状の活性炭や難水溶性難燃剤の定着性が悪くなるという問題があり、50重量%より多いと、揮発性有機化合物やオゾンの除去性能が低下する問題がある。 In the present invention, the mixing ratio of the fibrillated fibers is preferably 10 to 50% by weight with respect to the activated carbon in the gas adsorption sheet. More preferably, it is 15-45 weight%, More preferably, it is 20-40 weight%. If the mixing ratio of the fibrillated fiber is less than 10% by weight, there is a problem that the fixability of the powdered activated carbon or the hardly water-soluble flame retardant is deteriorated, and if it is more than 50% by weight, the removal performance of volatile organic compounds and ozone. There is a problem that decreases.
本発明で使用するバインダー繊維としては、例えば、ポリビニルアルコール繊維やポリオレフィン系繊維、ポリエステル繊維などの繊維が挙げられる。補助的なバインダー効果を得るために、粉末状のバインダーを使用してもよい。 Examples of the binder fiber used in the present invention include fibers such as polyvinyl alcohol fiber, polyolefin fiber, and polyester fiber. In order to obtain an auxiliary binder effect, a powdery binder may be used.
本発明において、バインダー繊維の混合比率は、ガス吸着用シート中の活性炭に対して5〜15重量%が好ましい。より好ましくは、6〜14重量%であり、さらに好ましくは7〜13重量%である。バインダー繊維の混合比率が5重量%より少ないとガス吸着用シートの強度低下が大きくなるという問題があり、15重量%より多いと、揮発性有機化合物やオゾンの除去性能が低下する問題がある。 In the present invention, the mixing ratio of the binder fiber is preferably 5 to 15% by weight with respect to the activated carbon in the gas adsorption sheet. More preferably, it is 6-14 weight%, More preferably, it is 7-13 weight%. When the mixing ratio of the binder fibers is less than 5% by weight, there is a problem that the strength of the gas adsorbing sheet is greatly reduced, and when it is more than 15% by weight, there is a problem that the performance of removing volatile organic compounds and ozone is deteriorated.
本発明において、ガス吸着用シートの目付は、10〜100g/m2が好ましい。より好ましくは20〜80g/m2である。当該シートの目付が10g/m2より小さいと揮発性有機化合物やオゾンの除去効果が小さく、100g/m2より大きいとシートが厚くなり、ハニカム形状にガス吸着用シートを加工した場合に開口率が小さくなって、通過する空気の圧力損失が大きくなるといった問題が起こるおそれがある。 In the present invention, the basis weight of the gas adsorption sheet is preferably 10 to 100 g / m 2 . More preferably, it is 20-80 g / m < 2 >. When the basis weight of the sheet is less than 10 g / m 2, the effect of removing volatile organic compounds and ozone is small, and when the sheet weight is greater than 100 g / m 2 , the sheet becomes thick, and when the gas adsorption sheet is processed into a honeycomb shape, the aperture ratio is increased. There is a possibility that a problem arises that the pressure loss of the air passing therethrough increases and the pressure loss of the passing air increases.
本発明のガス吸着用シートの厚みは、0.05〜0.3mmであることが好ましい。シートの厚みが0.05mm未満の場合には、ハニカム形状への折り込み加工の際の強度が不十分となり、シートの厚みが0.3mmを越える場合には、ハニカム形状にガス吸着性シートを加工した場合に開口率が小さくなって、通過する空気の圧力損失が大きくなるといった問題が起こるおそれがある。 The thickness of the gas adsorption sheet of the present invention is preferably 0.05 to 0.3 mm. If the sheet thickness is less than 0.05 mm, the strength during folding into the honeycomb shape is insufficient, and if the sheet thickness exceeds 0.3 mm, the gas adsorbent sheet is processed into a honeycomb shape. In this case, there is a possibility that the aperture ratio becomes small and the pressure loss of the passing air becomes large.
本発明のガス吸着用シートをハニカム形状とする方法には、従来公知の加工方法を用いることができる。なお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、ロール形のものなど中空多角柱、円柱などの中空柱体が連続したものをいう。例えば、ガス吸着用シートを正弦波形のハニカム形状とするには、まずガス吸着用シートを賦形ロールに通して波形に賦形し、波形の当該ガス吸着用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ーとする。ここで、波形の頂点に接着剤を付けて固定するのが普通であるが、波形のガス吸着用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、コーンスターチ、酢ビ樹脂、アクリル樹脂などが好適に使用できる。オゾン除去性能を高めるためには、波形のガス吸着用シートの接着ピッチを小さくし、山高さを低くするとよい。好適範囲としては、ピッチは0.5〜8mm、山高さは0.4〜5mmである。 A conventionally known processing method can be used as the method for forming the gas adsorption sheet of the present invention into a honeycomb shape. In addition, in the present invention, the honeycomb shape means a shape in which a hollow column such as a quadrangular, sinusoidal, roll shape or the like, or a hollow columnar body such as a cylinder, is continuous in addition to a hexagonal cross section. For example, in order to make the gas adsorption sheet into a sinusoidal honeycomb shape, first, the gas adsorption sheet is passed through a shaping roll and shaped into a waveform, and the corrugated gas adsorption sheet is flat on one or both sides. Join. This is laminated to form a sinusoidal honeycomb filter. Here, it is normal to attach and fix an adhesive at the top of the corrugation, but when a corrugated gas adsorbing sheet is laminated, the flat sheet in between is necessarily fixed, so an adhesive is always applied. There is no need. In addition, when attaching an adhesive agent, it is necessary to use what does not impair the adsorption | suction ability of a sheet | seat. As the adhesive, for example, corn starch, vinyl acetate resin, acrylic resin and the like can be suitably used. In order to enhance the ozone removal performance, the adhesion pitch of the corrugated gas adsorbing sheet is preferably reduced and the peak height is reduced. As a preferable range, the pitch is 0.5 to 8 mm, and the peak height is 0.4 to 5 mm.
本発明の空気清浄用フィルターの開口率は、シートの厚みやピッチ、山の高さを調整することによって制御することができ、好適範囲としては50〜90%である。開口率が50%未満の場合、通過する流体の圧力損失が大きくなり、90%を越える場合は、強度面で耐久性が落ちるおそれがある。 The aperture ratio of the air cleaning filter of the present invention can be controlled by adjusting the thickness, pitch, and peak height of the sheet, and the preferred range is 50 to 90%. When the aperture ratio is less than 50%, the pressure loss of the fluid passing therethrough increases, and when it exceeds 90%, the durability may decrease in terms of strength.
上記のように構成された本発明のガス吸着用シートおよび空気清浄フィルターは、通常使用時だけでなく燃焼時も活性炭層中の活性炭粒子を脱落させることがないので、有害ガス成分を効果的に除去できるだけでなく、UL規格94V−Oを満足する高い難燃性を持つ。 The gas adsorption sheet and air purifying filter of the present invention configured as described above do not drop activated carbon particles in the activated carbon layer not only during normal use but also during combustion, so that harmful gas components are effectively removed. Not only can it be removed, it has high flame resistance that satisfies UL standard 94V-O.
以下、実施例によって本発明のガス吸着用シートおよび空気清浄フィルターの作用効果を具体的に示すが、本発明はこれらによって何ら限定されるものではない。なお、実施例中で測定した特性値の評価方法を以下に示す。 Hereinafter, the working effects of the gas adsorbing sheet and the air purifying filter of the present invention will be specifically described by way of examples, but the present invention is not limited thereto. In addition, the evaluation method of the characteristic value measured in the Example is shown below.
(難燃性)
非特許文献1に記載されているULで定めるUL94V試験法に基づいて評価した(Standard for Test for Flammability of Plastic Materials for Parts in Devices and Appliances. Vertical Burning Test ;94V−0,94V−1,94V−2)。UL94試験法に定められた有炎燃焼時間、無炎燃焼時間から燃焼性のグレードを求め、定められた基準に達しないものは難燃性を不合格とした。
(Flame retardance)
Evaluation based on UL94V test method defined in UL described in Non-Patent Document 1 (Standard for Test for Flammability of Plastics Materials for Devices-Appliances and Applications-V94 94). 2). The flammability grade was calculated from the flammable combustion time and flameless combustion time specified in the UL94 test method, and those that did not meet the specified standard were rejected as flame retardant.
(オゾンの除去率)
層長15mmの空気清浄フィルターに、オゾン濃度1ppmの空気を風速1m/秒で通し、カラムの入口側と出口側のオゾン濃度を測定した。測定条件は、温度25℃、湿度50%とした。これらの測定値を下記式1に代入してオゾン除去率(%)を算出した。尚、初期効率を求めるため、測定開始後1分と100時間後でのオゾン除去率を求めた。
Air having an ozone concentration of 1 ppm was passed through an air purification filter having a layer length of 15 mm at a wind speed of 1 m / sec, and the ozone concentrations at the inlet and outlet sides of the column were measured. The measurement conditions were a temperature of 25 ° C. and a humidity of 50%. These measured values were substituted into the following formula 1 to calculate the ozone removal rate (%). In addition, in order to obtain | require initial efficiency, the ozone removal rate after 1 minute and 100 hours after a measurement start was calculated | required.
(トルエンの除去率)
層長15mmの空気清浄フィルターに、トルエン濃度5ppmの空気を風速1m/秒で通し、カラムの入口側と出口側のトルエン濃度を測定した。測定条件は、温度25℃、湿度50%とした。これらの測定値を下記式2に代入してトルエン除去率(%)を算出した。尚、初期効率を求めるため、測定開始後1分でのトルエン除去率を求めた。
Air having a toluene concentration of 5 ppm was passed through an air cleaning filter having a layer length of 15 mm at a wind speed of 1 m / sec, and the toluene concentrations at the inlet and outlet sides of the column were measured. The measurement conditions were a temperature of 25 ° C. and a humidity of 50%. These measured values were substituted into the following
(圧力損失)
層長15mmの空気清浄フィルターに、空気を風速1m/秒で通し、カラムの入口側と出口側の差圧から圧力損失を測定した。測定条件は、温度25℃、湿度50%とした。
(Pressure loss)
Air was passed through an air purification filter having a layer length of 15 mm at a wind speed of 1 m / sec, and the pressure loss was measured from the differential pressure between the inlet side and the outlet side of the column. The measurement conditions were a temperature of 25 ° C. and a humidity of 50%.
(平均粒子直径)
各粒子を走査型電子顕微鏡(SEM)で観察し、100個の粒子の直径を測定し、それから平均直径を算出した。
(Average particle diameter)
Each particle was observed with a scanning electron microscope (SEM), the diameter of 100 particles was measured, and the average diameter was calculated therefrom.
(平均繊維直径)
各粒子を走査型電子顕微鏡(SEM)で観察し、100本の繊維の直径を測定し、それから平均直径を算出した。
(Average fiber diameter)
Each particle was observed with a scanning electron microscope (SEM), the diameter of 100 fibers was measured, and the average diameter was calculated therefrom.
(ハニカム接着性)
ピッチ2.6mm、山高さ1.2mmの片段ボールシートを、図3に示すような2枚積層したサンプルを作製した。サンプルサイズは、幅50mm、長さ250mmにカットし予め50mmを剥がす。その後、引張試験機に設置し、引張速度100mm/分で100mm間の剥離強度を測定した。接着点が2.6mm間隔であるため、不連続の強度を示すために最大強度から5点をピックアップし、その平均値を剥離強度とした。綺麗に剥離するサンプルは、剥離強度を数値として示すことができるが、試験途中でガス吸着用シートが切断するサンプルは材料破壊とした。材料破壊の場合、ハニカム接着性がガス吸着用シートの切断強度より高いことを表すために、ハニカム接着性としては良好となる。
(Honeycomb adhesiveness)
A sample in which two single-stage cardboard sheets having a pitch of 2.6 mm and a peak height of 1.2 mm were laminated as shown in FIG. 3 was produced. The sample size is cut to a width of 50 mm and a length of 250 mm, and 50 mm is peeled off in advance. Then, it installed in the tensile tester and peel strength between 100 mm was measured at the tensile speed of 100 mm / min. Since the adhesion points are 2.6 mm apart, 5 points were picked up from the maximum strength to show discontinuous strength, and the average value was taken as the peel strength. Samples that peel exquisitely can show the peel strength as a numerical value, but samples that the gas adsorbing sheet cuts during the test were considered as material destruction. In the case of material destruction, the honeycomb adhesiveness is good because it represents that the honeycomb adhesiveness is higher than the cutting strength of the gas adsorption sheet.
<実施例1>
平均粒子直径20μmの木質系活性炭を25g/m2、難水溶性難燃剤として平均粒子直径12μmのリン酸メラミン(20℃の水への溶解度:0.2重量%)を12.5g/m2、フィブリル化繊維のNBKPパルプを10g/m2、バインダー繊維として平均繊維直径12μmのポリビニルアルコール繊維を2.5g/m2になるように配合し湿式抄紙を行い、目付50g/m2、厚み0.15mmのガス吸着用シートを作製した。次に、コルゲート加工機を用いてガス吸着用シートをピッチ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積み重ね、切断加工して層長15mmのハニカム型空気清浄フィルターを得た。
<Example 1>
12.5 g / m 2 of woody activated carbon having an average particle diameter of 20 μm and 25 g / m 2 of melamine phosphate having a mean particle diameter of 12 μm (solubility in water at 20 ° C .: 0.2% by weight) as a hardly water-soluble flame retardant. , NBKP pulp of fibrillated fiber is mixed at 10 g / m 2 , polyvinyl alcohol fiber having an average fiber diameter of 12 μm as binder fiber is mixed at 2.5 g / m 2 , wet papermaking is performed, and the basis weight is 50 g / m 2 , thickness 0 A 15 mm gas adsorption sheet was prepared. Next, the sheet | seat for gas adsorption | suction was shape | molded into the corrugated sheet machine with the pitch 2.6mm and the peak height 1.2mm using the corrugating machine. The single cardboard sheets were stacked and cut to obtain a honeycomb type air purification filter having a layer length of 15 mm.
<実施例2>
平均粒子直径20μmの木質系活性炭を25g/m2、難水溶性難燃剤として平均粒子直径12μmのリン酸メラミン(20℃の水への溶解度:0.2重量%)を12.5g/m2、フィブリル化繊維のNBKPパルプを10g/m2、バインダー繊維として平均繊維直径12μmのポリビニルアルコール繊維を2g/m2と平均繊維直径14μm、繊維長5mmの芯鞘ポリエステル繊維(芯部融点:260℃、鞘部融点:110℃)を0.5g/m2になるように配合し湿式抄紙を行い、目付50g/m2、厚み0.15mmのガス吸着用シートを作製した。次に、コルゲート加工機を用いてガス吸着用シートをピッチ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積み重ね、切断加工して層長15mmのハニカム型空気清浄フィルターを得た。
<Example 2>
12.5 g / m 2 of woody activated carbon having an average particle diameter of 20 μm and 25 g / m 2 of melamine phosphate having a mean particle diameter of 12 μm (solubility in water at 20 ° C .: 0.2% by weight) as a hardly water-soluble flame retardant. , 10 g / m 2 of NBKP pulp fibrillated fibers, average polyvinyl alcohol fibers having an average fiber diameter of 12μm as a binder fiber and 2 g / m 2 fiber diameter 14 [mu] m, a fiber length of 5mm sheath polyester fiber (core melting point: 260 ° C. , Sheath melting point: 110 ° C.) was mixed so as to be 0.5 g / m 2 , and wet papermaking was performed to produce a sheet for gas adsorption having a basis weight of 50 g / m 2 and a thickness of 0.15 mm. Next, the sheet | seat for gas adsorption | suction was shape | molded into the corrugated sheet machine with the pitch 2.6mm and the peak height 1.2mm using the corrugating machine. The single cardboard sheets were stacked and cut to obtain a honeycomb type air purification filter having a layer length of 15 mm.
<比較例1>
平均粒子直径20μmの木質系活性炭を25g/m2、フィブリル化繊維のNBKPパルプを10g/m2、バインダー繊維として平均繊維直径12μmのポリビニルアルコール繊維を2g/m2と平均繊維直径14μm、繊維長5mmの芯鞘ポリエステル繊維(芯部融点:260℃、鞘部融点:110℃)を0.5g/m2になるように配合し湿式抄紙を行い、目付37.5g/m2、厚み0.13mmの湿式シートを作製した。この湿式シートに含浸加工法で、水溶性難燃剤のリン酸グアニジンを7.5g/m2添着し、目付45g/m2、厚み0.14mmのガス吸着用シートを作製した。次に、コルゲート加工機を用いてガス吸着用シートをピッチ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積み重ね、切断加工して層長15mmのハニカム形状の空気清浄フィルターを得た。
<Comparative Example 1>
25g / m 2 wood based activated carbon with an average particle diameter of 20μm, 10g / m 2 of fibrillated NBKP pulp, 2g / m 2 of polyvinyl alcohol fiber with an average fiber diameter of 12μm as binder fiber, an average fiber diameter of 14μm,
<比較例2>
フィブリル化繊維のNBKPパルプを10g/m2、バインダー繊維として平均繊維直径12μmのポリビニルアルコール繊維を2g/m2、平均繊維直径14μm、繊維長5mmの芯鞘ポリエステル繊維(芯部融点:260℃、鞘部融点:110℃)を0.5g/m2になるように配合し湿式抄紙を行い、目付12.5g/m2、厚み0.06mmの湿式シートと作製した。この湿式シートの両側表面に、平均粒子直径20μmの木質系活性炭、平均粒子直径12μmのリン酸メラミン(20℃の水への溶解度:0.2%)、バインダー成分のアルギン酸ナトリウムを加えて、ペースト状として湿式シートにコート加工した。それぞれのコート量は、活性炭を25g/m2、リン酸メラミンを12.5g/m2、アルギン酸ナトリウムを5g/m2とし、目付55g/m2、厚さ0.15mmのガス吸着用シートを作製した。次に、コルゲート加工機を用いてガス吸着用シートをピッチ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積み重ね、切断加工して層長15mmのハニカム形状の空気清浄フィルターを得た。
<Comparative Example 2>
NBKP pulp of fibrillated fiber is 10 g / m 2 , polyvinyl alcohol fiber having an average fiber diameter of 12 μm as binder fiber is 2 g / m 2 , average fiber diameter of 14 μm, core sheath polyester fiber having a fiber length of 5 mm (core melting point: 260 ° C., (Sheath part melting point: 110 ° C.) was mixed so as to be 0.5 g / m 2 , and wet papermaking was performed to prepare a wet sheet having a basis weight of 12.5 g / m 2 and a thickness of 0.06 mm. To both surfaces of this wet sheet, paste wood based activated carbon having an average particle diameter of 20 μm, melamine phosphate having an average particle diameter of 12 μm (solubility in water at 20 ° C .: 0.2%), sodium alginate as a binder component, and paste The wet sheet was coated as a shape. The coating amount is 25 g / m 2 for activated carbon, 12.5 g / m 2 for melamine phosphate, 5 g / m 2 for sodium alginate, and a sheet for gas adsorption with a basis weight of 55 g / m 2 and a thickness of 0.15 mm. Produced. Next, the sheet | seat for gas adsorption | suction was shape | molded into the corrugated sheet machine with the pitch 2.6mm and the peak height 1.2mm using the corrugating machine. The single cardboard sheets were stacked and cut to obtain a honeycomb-shaped air purification filter having a layer length of 15 mm.
<比較例3>
フィブリル化繊維のNBKPパルプを10g/m2、バインダー繊維として平均繊維直径12μmのポリビニルアルコール繊維を2g/m2、平均繊維直径14μm、繊維長5mmの芯鞘ポリエステル繊維(芯部融点:260℃、鞘部融点:110℃)を0.5g/m2になるように配合し湿式抄紙を行い、目付12.5g/m2、厚み0.06mmの湿式シートと作製した。この湿式シートの両側表面に、平均粒子直径20μmの木質系活性炭、水溶性難燃剤のリン酸グアニジン、バインダー成分のアルギン酸ナトリウムを加えて、ペースト状として湿式シートにコート加工した。それぞれのコート量は、活性炭を25g/m2、リン酸グアニジンを7.5g/m2、アルギン酸ナトリウムを5g/m2とし、目付50g/m2、厚さ0.15mmのガス吸着用シートを作製した。次に、コルゲート加工機を用いてガス吸着用シートをピッチ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積み重ね、切断加工して層長15mmのハニカム形状の空気清浄フィルターを得た。
<Comparative Example 3>
NBKP pulp of fibrillated fiber is 10 g / m 2 , polyvinyl alcohol fiber having an average fiber diameter of 12 μm as binder fiber is 2 g / m 2 , average fiber diameter of 14 μm, core sheath polyester fiber having a fiber length of 5 mm (core melting point: 260 ° C., (Sheath part melting point: 110 ° C.) was mixed so as to be 0.5 g / m 2 , and wet papermaking was performed to prepare a wet sheet having a basis weight of 12.5 g / m 2 and a thickness of 0.06 mm. On both surfaces of this wet sheet, a wood-type activated carbon having an average particle diameter of 20 μm, a water-soluble flame retardant guanidine phosphate and a binder component sodium alginate were added to form a paste to coat the wet sheet. The coating amount is 25 g / m 2 for activated carbon, 7.5 g / m 2 for guanidine phosphate, 5 g / m 2 for sodium alginate, and a gas adsorption sheet having a basis weight of 50 g / m 2 and a thickness of 0.15 mm. Produced. Next, the sheet | seat for gas adsorption | suction was shape | molded into the corrugated sheet machine with the pitch 2.6mm and the peak height 1.2mm using the corrugating machine. The single cardboard sheets were stacked and cut to obtain a honeycomb-shaped air purification filter having a layer length of 15 mm.
実施例1〜2、比較例1〜3で得られた空気清浄フィルターの構成の詳細を表1に、オゾン除去率と圧力損失と難燃性とハニカム接着性の評価結果を表2に示す。 Details of the structures of the air purification filters obtained in Examples 1 and 2 and Comparative Examples 1 to 3 are shown in Table 1, and the evaluation results of the ozone removal rate, pressure loss, flame retardance, and honeycomb adhesion are shown in Table 2.
表1、2から明らかなように、実施例1〜2はオゾン除去率が高く、UL難燃性試験においてUL94V−0で、さらにハニカム接着性も材料破壊になるぐらい接着性が良好で、取り扱い性が大幅に向上した。一方、比較例1は水溶性難燃剤を用いているために、オゾン除去率も初期も寿命も低性能である。比較例2はガス吸着用シートが3層となり、シート表面が粒子で覆われているためにハニカム接着性が弱く、取り扱いが悪く、輸送時にハニカムが割れる場合があり、過剰梱包が必要となる。比較例3はオゾン除去率、ハニカム接着性が悪い。 As is clear from Tables 1 and 2, Examples 1 and 2 have a high ozone removal rate, UL94V-0 in the UL flame retardant test, and the adhesiveness is good enough to cause material destruction of the honeycomb. The characteristics have been greatly improved. On the other hand, since Comparative Example 1 uses a water-soluble flame retardant, the ozone removal rate, the initial stage, and the lifetime are low. In Comparative Example 2, the gas adsorbing sheet has three layers, and the sheet surface is covered with particles, so that the adhesiveness of the honeycomb is weak, the handling is bad, the honeycomb may break during transportation, and excessive packaging is required. Comparative Example 3 has poor ozone removal rate and honeycomb adhesion.
本発明のガス吸着用シートおよび空気清浄フィルターは、揮発性有機化合物やオゾンなどの有害ガス成分の除去性と難燃性に優れ、ハニカム型フィルターの接着性も良好で、コピー機、プリンター、多機能OA機、コンピュータ、プロジェクター、POD印刷機等の電子機器の排出ガス中に含まれる有害ガス成分を除去するための空気清浄フィルター等に好適に使用できる。 The gas adsorption sheet and air purifying filter of the present invention are excellent in the removal and flame retardancy of harmful gas components such as volatile organic compounds and ozone, and have good adhesion of the honeycomb type filter. It can be suitably used for an air cleaning filter or the like for removing harmful gas components contained in the exhaust gas of electronic devices such as functional OA machines, computers, projectors, and POD printers.
1 活性炭
2 難水溶性難燃剤
3 フィブリル化繊維
4 バインダー繊維
5 ガス吸着用シート
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