JP3646877B2 - Quilted sheet containing fibrous activated carbon - Google Patents
Quilted sheet containing fibrous activated carbon Download PDFInfo
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- JP3646877B2 JP3646877B2 JP2001199410A JP2001199410A JP3646877B2 JP 3646877 B2 JP3646877 B2 JP 3646877B2 JP 2001199410 A JP2001199410 A JP 2001199410A JP 2001199410 A JP2001199410 A JP 2001199410A JP 3646877 B2 JP3646877 B2 JP 3646877B2
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Description
【０００１】
【発明の属する技術分野】
本発明は、繊維状活性炭シートによりガス状有害物質を吸着除去するフィルターに関する。詳細には脱臭フィルター、水処理フィルター、防護衣服等に供するシート等に関するものである。
【０００２】
【従来技術】
繊維状活性炭単独で形成されたシートは、従来より織物状、編物状、不織布状と種々提案されている。しかしなら該シート単独で加工及び使用されると、外部から加えられる機械的な力により活性炭繊維が破損または粉末化され、活性炭粉塵が脱落、飛散する問題が生じる。
【０００３】
従来、活性炭の脱落、飛散を抑制するために、高密度の織物や高充填率の不織布等により活性炭を挟み込む、または包み込むという方法が利用されている。しかし、これらの方法によると活性炭の脱落は抑制されるが材料の通気性が低下し、また剛性が高くなるという問題が生じる。
【０００４】
特開昭５８−８１４２５号、特公昭６２−４６６８０号あるいは特許２６９５４５０号には繊維状活性炭のカットファイバーを紙に梳く方法が提示されている。しかし紙にする場合、パルプ等の支持繊維を併用するためにシート中の活性炭の使用比率が低くなるので、十分な吸着性能すなわちフィルター性能が得られないとともに通気性が低くなる。
【０００５】
特開平３−９６３４７号には紙層と紙層の間に粒状あるいは粉状の活性炭を水溶性接着剤により接着積層した材料が開示されている。これによれば紙層により活性炭が保護され活性炭の破損、粉末化は抑制される。しかしながら粒状あるいは粉状の活性炭を使用しているため繊維状活性炭に比べて吸着速度が小さくなる上に、接着剤により活性炭の一部分が被覆されるため吸着容量も小さくなる。また紙層により通気性が低下し剛性が高くなる問題がある。
【０００６】
特開昭６０−４８１１０号あるいは特許１６６９２０８号には紙、織編物あるいは不織布の基材シートにバインダーを介して活性炭を接着させたフィルター材が提示されている。通気性を有する基材シートを用いることにより十分な通気性は得られるが、上記の従来例と同様に活性炭の一部分が接着剤により被覆されることにより吸着容量は低下する。また接着箇所が部分的であるため接着されていない箇所については外部からの機械的な力により活性炭の破損あるいは粉末化が生じることは防げない。
【０００７】
【発明が解決しようとする課題】
本発明の目的は、繊維状活性炭シートにかかる機械的な力による繊維の破損あるいは粉末化から発生する活性炭粉塵の脱落、飛散を防止し、なおかつ通気性、柔軟性の優れた繊維状活性炭シートを提供することにある。
【０００８】
【課題を解決するための手段】
上記課題を解決するにあたり、本発明者らは鋭意検討の結果本発明に至った。すなわち本発明は、吸着材保護層即ち、織物、編物、不織布、開孔フィルム等の材料などからなる通気性、柔軟性に優れた基材（繊維状活性炭布の保護層）で繊維状活性炭布を挟み込んだキルティング積層布帛を水分散系のバインダー樹脂加工浴により浸漬処理（ディップ・ニップ）し、乾燥・固着処理（ドライ・キュア）を施して得られ、通気性が１０ｃｍ3／ｃｍ2・ｓ以上、剛軟度が３ｇｆ・ｃｍ以下であることを特徴とするキルティング吸着シートである。
【０００９】
水分散系のバインダー樹脂としては、材料の柔軟性を維持するという観点からウレタン系、アクリル系、ビニル系またはシリコン系の樹脂を用いることが推奨される。また付与される樹脂量としては固形分で０．０１〜２ｗｔ％、好ましくは０．１〜１．５ｗｔ％が適切である。また架橋剤を併用して固着された吸着シートは特に活性炭粉塵の脱落が少なくなる。溶液タイプのバインダーの場合、バインダーのモノマーやオリゴマーおよび溶媒が繊維状活性炭に吸着されるので用いることはできない。
【００１０】
【発明の実施の態様】
本発明に使用する繊維状活性炭は、綿、麻といった天然セルロース繊維の他、レーヨン、ポリノジック、溶剤紡糸法によるといった再生セルロース繊維、さらにはポリビニルアルコール繊維、アクリル系繊維、芳香族ポリアミド繊維、架橋ホルムアルデヒド繊維、リグニン繊維、フェノール系繊維、石油ピッチ繊維等の合成繊維を原料として製造することができる。具体的には、これら原料繊維の短繊維あるいは長繊維を用いて製織、製編、不織布化した布帛に必要に応じて適当な耐炎化剤を含有させた後、４５０℃以下の温度で耐炎化処理を施し、次いで５００℃以上１０００℃以下の温度で炭化賦活する公知の方法によって製造できる。
【００１１】
この際用いられる原料繊維は、得られる繊維状活性炭の物性（強度等）が高いこと、優れた吸着性能が得られること等から、再生セルロース繊維、フェノール系繊維、アクリル系繊維が好ましく、また賦活処理としては、水蒸気、二酸化炭素等の賦活ガスを１０〜７０容量％含有した状態で、７００℃以上に加熱することにより行うことが好ましい。賦活の温度、時間、賦活ガス濃度等の条件を選定することにより、比表面積が５００〜２５００ｍ2／ｇの任意の活性度を有する繊維状活性炭布が得られる。
【００１２】
繊維状活性炭布の形態としては、織物状、編物状、不織布状、フェルト状等が挙げられるが、通気性、積層の容易性、柔軟性などの面から勘案して、織物状または編物状であることが好ましい。また炭化賦活工程は前記原料繊維を炭化賦活した後、布帛状に形成することも可能であるが、ハンドリングの面からは、布帛形成後に炭化賦活処理を施すのが好ましい。
【００１３】
繊維状活性炭布の保護層としては、織物、編物、不織布、開孔フィルム等の材料があげられるが、通気性、柔軟性の面から粗い密度で製織あるいは製編された織物あるいは編物が好ましい。本繊維状活性炭布の保護層の目的としては、外部から与えられる機械的な力から繊維状活性炭布を保護すること、また繊維状活性炭布の機械的強度を補うことにある。
【００１４】
繊維状活性炭布と繊維状活性炭布の保護層の積層手段としては、接着剤塗布による貼り合わせ、粉体、粒体、あるいは不織布状ホットメルト接着剤による接着、またはキルティングによる積層、及びこれらの組み合わせ等が挙げられる。活性炭の吸着性能を損なわないこと、積層加工による質量の増大がほとんどないこと、通気性を損なわないこと、加工や補修が容易なことあるいは柔軟性の面からキルティングで積層する方法が好ましい。
【００１５】
本発明の目的を達するためには、前記積層材料を水分散系のバインダー樹脂加工浴中に浸漬し、乾燥・固着する必要がある。具体的には該積層材料を水分散系のバインダー樹脂加工浴に浸漬処理（ディップ・ニップ）し、乾燥後、１３０℃以上１９０℃以下の温度で固着処理する。加工液に十分に材料を浸漬させることにより活性炭繊維間の接着が均一に強固なものとなり、活性炭の脱落、飛散を効果的に抑制することができる。
【００１６】
水分散系のバインダー樹脂としては、ウレタン系、アクリル系、ビニル系、エステル系、シリコン系、ナイロン系、オレフィン系等あげられるが、材料の柔軟性を勘案し、硬化後のポリマーの剛性が小さいウレタン系、アクリル系、酢酸ビニル系またはシリコン系の樹脂を用いることが好ましい。
【００１７】
樹脂の付与量としては、活性炭の脱落防止性と材料の吸着性、柔軟性とを考え合わせ、固形分として繊維状活性炭に対して０．０１〜２ｗｔ％付与することが好ましい。０．０１ｗｔ％以下であると十分な脱落防止性が得られず、２ｗｔ％を超えると活性炭の吸着性が損なわれるとともに材料が硬くなる。
【００１８】
また樹脂の固着処理に架橋剤を併用することにより、柔軟性を損なうことなく、活性炭の脱落防止性を効果的に高めることができる。
【００１９】
最終製品の吸着材として通気性は１０ｃｍ3／ｃｍ2・ｓ以上あることが好ましく、１０ｃｍ3／ｃｍ2・ｓ以下であると十分なフィルター効果が得られず、衣服材に適用する場合は過度の暑熱下や過大な運動時には蒸れ感の解消ができなくなる。また剛軟度は３ｇｆ・ｃｍ以下が好ましく、３ｇｆ・ｃｍ以上であると衣服材としては剛性が高くなり着用感に劣る。
【実施例】
以下実施例に基づいて本発明をさらに詳細に説明するが、本発明はこれらの実施例によって制限されるものではない。尚実施例に記載の評価方法は以下に記す方法による。尚実施例及び比較例の条件及び結果については、表１にまとめた。
【００２０】
ガス平衡吸着量：１／１０飽和度のトルエン蒸気に対する吸着量をＪＩＳ−Ｋ−１４７７に記載の方法により測定した（なお、ここでは吸着量の単位としてｗｔ％を割かえして、ｇ／ｍ2を用いた）。
活性炭粉塵量：単位面積（１ｍ2）の試料の片面から家庭用掃除機（日立クリーナー ＣＶ−Ｗ７５）で３分間活性炭を吸い取り、ゴミパックに集められた活性炭粉塵を定量し、これを粉塵量とする。
剛軟性 ：ＪＩＳ−Ｌ−１０９６ ６．２２．２ Ｂ法（スライド法）による。
比表面積：窒素の吸着等温線を求め、これを基にしてＢＥＴ法により算出する。
通気性 ：ＪＩＳ−Ｌ−１０１８ ６．３４ による。
厚さ：ＪＩＳ−Ｌ−１０１８ ６．５ による。
【００２１】
編物状活性炭布を次に記載した方法で作成した。即ち、単糸２．２ｄｔｅｘ２０ｓ／１のノボラック系フェノール樹脂繊維紡績糸からなる目付２２０ｇ／ｍ2の丸編物を４００℃の不活性雰囲気中で３０分間加熱し、次に８９０℃まで２０分間、不活性雰囲気中で加熱し炭化を進行させ、次に水蒸気を１２容量％含有する雰囲気中、８９０℃の温度で２時間加熱賦活した。得られた編物状の繊維状活性炭の質量は１２５ｇ／ｍ2、比表面積１４００ｍ2／ｇ、厚さ０．８０ｍｍ、通気性は水位計１．２７ｃｍの圧力差で２００ｃｍ3／ｃｍ2・ｓ、トルエンの平衡吸着量は５６ｇ／ｍ2であった。
【００２２】
一方、トリコット編地（繊維状活性炭布の保護層）を以下の方法で作成した。２８ゲージ２枚筬トリコット機により、フロント筬にポリエステルフィラメント（８２．５ｄｔｅｘ、３６フィラメント）を、またバック筬にポリエステルフィラメント（２２ｄｔｅｘ、モノフィラメント）を各々フルセットして、フロント１−２／１−０、バック１−０／２−３の組織で経編地を編成後、定法により精練し、更に分散染料により染色した。このようにして得られた編地は、厚み０．２８ｍｍ、目付６０ｇ／ｃｍ2、通気性５００ｃｍ3／ｃｍ2・ｓ であった。
【００２３】
前記編物状活性炭布を中間層として、該トリコット編地で両面を積層し、１ｉｎｃｈピッチでキルティングにより縫合した。得られた複合材は、質量２５０ｇ／ｍ2、厚さ１．３６ｍｍ、通気性１８０ｃｍ3／ｃｍ2・ｓ、トルエンの平衡吸着量は５６．３ｇ／ｍ2、剛軟度２．０８ｇｆ・ｃｍ、活性炭粉塵量は９２ｍｇ／ｍ2であった。
【００２４】
【実施例１】
〔００２５〕項で作成した積層材料を４ｗｔ％のウレタン系バインダー樹脂（明成化学工業（株）パスコールＶ１０１）加工浴にパッド乾燥後、１７０℃で固着処理を施し、樹脂固形分で１．０３ｗｔ％付着させた。この材料の活性炭粉塵量、ガス平衡吸着量、剛軟度を表１に示す。
【００２５】
【実施例２】
０．５ｗｔ％の酢酸ビニル系バインダー樹脂（明成化学工業（株）メイカセットＬＣ１０１）及び０．３ｗｔ％の架橋剤（住友化学工業（株）スミテックスレジンＭ−３）を含む加工浴を用い実施例１と同様な加工処理を施し、樹脂固形分で０．１３ｗｔ％付着させた。この材料の活性炭粉塵量、ガス平衡吸着量、剛軟度を表１に示す。
【００２６】
【比較例１】
バインダーで処理する前の材料を比較例１とする。
【００２７】
【比較例２】
３ｗｔ％エステル系バインダー樹脂（高松油脂（株）ＴＫセット４１３）加工浴を用い実施例１と同様な加工処理を施し、樹脂固形分で０．７７ｗｔ％付着させた。
【００２８】
【比較例３】
９ｗｔ％ウレタン系バインダー樹脂（明成化学工業（株）パスコールＶ１０１）加工浴を用い実施例１と同様な加工処理を施し、樹脂固形分で２．３０ｗｔ％付着させた。
【００２９】
【表１】
実施例１，２は活性炭の吸着性能を全く損うことなく活性炭の粉塵量を大幅に減少させている。それに対し比較例２は粉塵量は低下するが、柔軟性に低下が認められた。比較例３については、吸着性について大きな低下が認められた。
【００３１】
【発明の効果】
通気性、柔軟性に優れた基材（繊維状活性炭布の保護層）で繊維状活性炭布を挟み込んだ積層布帛を水分散系のバインダー樹脂加工浴により浸漬処理（ディップ・ニップ）し、乾燥・固着処理（ドライ・キュア）を施して得られることにより、繊維状活性炭布にかかる機械的な力による繊維の破損あるいは粉末化から発生する活性炭粉塵の脱落、飛散を防止し、なおかつ通気性、柔軟性の優れた繊維状活性布を得ることができ、産業界への寄与は大である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filter that adsorbs and removes gaseous harmful substances using a fibrous activated carbon sheet. Specifically, the present invention relates to a sheet used for a deodorizing filter, a water treatment filter, protective clothing, and the like.
[0002]
[Prior art]
Various sheets of woven, knitted, and non-woven fabrics have been proposed for sheets formed of fibrous activated carbon alone. However, if the sheet is processed and used alone, there is a problem that the activated carbon fiber is broken or pulverized by a mechanical force applied from the outside, and the activated carbon dust is dropped and scattered.
[0003]
Conventionally, in order to suppress the falling off and scattering of activated carbon, a method of sandwiching or wrapping activated carbon with a high-density woven fabric, a high-filling nonwoven fabric, or the like has been used. However, according to these methods, the falling off of the activated carbon is suppressed, but there are problems that the air permeability of the material is lowered and the rigidity is increased.
[0004]
JP-A-58-81425, JP-B-62-46680, or Japanese Patent No. 2695450 disclose a method of spreading a cut fiber of fibrous activated carbon on paper. However, in the case of using paper, since the use ratio of activated carbon in the sheet is lowered because the supporting fiber such as pulp is used in combination, sufficient adsorption performance, that is, filter performance cannot be obtained and air permeability is lowered.
[0005]
Japanese Patent Laid-Open No. 3-96347 discloses a material in which granular or powdery activated carbon is bonded and laminated with a water-soluble adhesive between paper layers. According to this, the activated carbon is protected by the paper layer, and damage and powdering of the activated carbon are suppressed. However, since granular or powdery activated carbon is used, the adsorption rate is lower than that of fibrous activated carbon, and the adsorption capacity is also reduced because a part of the activated carbon is covered with an adhesive. Further, the paper layer has a problem that air permeability is lowered and rigidity is increased.
[0006]
Japanese Patent Application Laid-Open No. 60-48110 or Japanese Patent No. 1669208 discloses a filter material in which activated carbon is adhered to a base sheet of paper, woven or knitted fabric or nonwoven fabric through a binder. Sufficient air permeability can be obtained by using a base sheet having air permeability, but the adsorption capacity is lowered by covering a part of the activated carbon with an adhesive as in the conventional example. In addition, since the bonded portion is partial, it is impossible to prevent the activated carbon from being damaged or powdered by an external mechanical force at a portion that is not bonded.
[0007]
[Problems to be solved by the invention]
It is an object of the present invention to provide a fibrous activated carbon sheet that prevents activated carbon dust from falling off or scattering due to fiber breakage or pulverization due to mechanical force applied to the fibrous activated carbon sheet, and has excellent breathability and flexibility. It is to provide.
[0008]
[Means for Solving the Problems]
In solving the above problems, the present inventors have intensively studied to arrive at the present invention. That is, the present invention relates to an adsorbent protective layer, that is, a fibrous activated carbon cloth with a base material (a protective layer of a fibrous activated carbon cloth ) excellent in air permeability and flexibility made of a material such as a woven fabric, a knitted fabric, a nonwoven fabric, and an apertured film. Is obtained by dipping (dip nip) a quilted laminated fabric with water dispersed binder resin processing bath, drying and fixing treatment (dry cure), and air permeability of 10 cm 3 / cm 2 · s As described above, the quilting adsorbing sheet has a bending resistance of 3 gf · cm or less.
[0009]
As the water-dispersed binder resin, it is recommended to use a urethane-based, acrylic-based, vinyl-based or silicon-based resin from the viewpoint of maintaining the flexibility of the material. The amount of resin applied is 0.01 to 2 wt%, preferably 0.1 to 1.5 wt% in terms of solid content. In addition, the adsorbing sheet fixed with the use of a crosslinking agent particularly reduces the falling off of activated carbon dust. In the case of a solution type binder, the binder monomer, oligomer and solvent are adsorbed on the fibrous activated carbon, and cannot be used.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
The fibrous activated carbon used in the present invention includes natural cellulose fibers such as cotton and hemp, regenerated cellulose fibers such as those produced by rayon, polynosic, and solvent spinning, and also polyvinyl alcohol fibers, acrylic fibers, aromatic polyamide fibers, and crosslinked formaldehyde. Synthetic fibers such as fibers, lignin fibers, phenolic fibers, and petroleum pitch fibers can be used as raw materials. Specifically, after adding a suitable flameproofing agent to the fabric made by weaving, knitting or non-woven fabric using the short fibers or long fibers of the raw material fibers as necessary, flameproofing is performed at a temperature of 450 ° C. or lower. It can manufacture by the well-known method of giving a process and then activating carbonization at the temperature of 500 to 1000 degreeC.
[0011]
The raw fiber used in this case is preferably a regenerated cellulose fiber, a phenol fiber, or an acrylic fiber because the physical properties (strength, etc.) of the obtained fibrous activated carbon are high and an excellent adsorption performance is obtained. The treatment is preferably performed by heating to 700 ° C. or higher in a state containing 10 to 70% by volume of an activation gas such as water vapor or carbon dioxide. By selecting conditions such as activation temperature, time, and activation gas concentration, a fibrous activated carbon cloth having an arbitrary activity with a specific surface area of 500 to 2500 m 2 / g is obtained.
[0012]
Examples of the form of the fibrous activated carbon cloth include a woven form, a knitted form, a non-woven form, a felt form, etc. In consideration of air permeability, ease of lamination, flexibility, etc. Preferably there is. In the carbonization activation step, the raw material fibers can be carbonized and then formed into a fabric shape. However, from the viewpoint of handling, it is preferable to perform a carbonization activation treatment after forming the fabric.
[0013]
Examples of the protective layer of the fibrous activated carbon cloth include materials such as woven fabrics, knitted fabrics, non-woven fabrics, and apertured films, but woven fabrics or knitted fabrics woven or knitted at a coarse density are preferable in terms of air permeability and flexibility. The purpose of the protective layer of the present fibrous activated carbon cloth is to protect the fibrous activated carbon cloth from mechanical force given from the outside, and to supplement the mechanical strength of the fibrous activated carbon cloth.
[0014]
As a means for laminating the protective layer of fibrous activated carbon cloth and fibrous activated carbon cloth , bonding by adhesive application, adhesion by powder, granule, non-woven fabric hot melt adhesive, lamination by quilting, and combinations thereof Etc. A method in which the adsorption performance of activated carbon is not impaired, there is almost no increase in mass due to lamination processing, air permeability is not impaired, processing and repair are easy, or lamination by quilting is preferred from the viewpoint of flexibility.
[0015]
In order to achieve the object of the present invention, it is necessary to immerse the laminated material in a water-dispersed binder resin processing bath, and dry and fix it. Specifically, the laminated material is immersed in a water-dispersed binder resin processing bath (dip nip), dried, and fixed at a temperature of 130 ° C. or higher and 190 ° C. or lower. By sufficiently immersing the material in the processing liquid, the adhesion between the activated carbon fibers becomes uniformly strong, and the falling off and scattering of the activated carbon can be effectively suppressed.
[0016]
Examples of water-dispersed binder resins include urethanes, acrylics, vinyls, esters, silicons, nylons, olefins, etc., but the rigidity of the polymer after curing is small considering the flexibility of the material. It is preferable to use a urethane-based, acrylic-based, vinyl acetate-based or silicon-based resin.
[0017]
The amount of the resin to be applied is preferably 0.01 to 2 wt% as a solid content with respect to the fibrous activated carbon in consideration of the ability of activated carbon to fall off, the adsorptivity of the material, and flexibility. If it is 0.01 wt% or less, sufficient drop-off preventing property cannot be obtained, and if it exceeds 2 wt%, the adsorptivity of activated carbon is impaired and the material becomes hard.
[0018]
Further, by using a crosslinking agent in combination with the resin fixing treatment, it is possible to effectively enhance the ability of the activated carbon to fall off without impairing flexibility.
[0019]
Preferably the breathable is 10cm 3 / cm 2 · s or more as an adsorbent of the final product, 10cm 3 / cm 2 · s by mass or less is sufficient filter effect not obtained, excessively when applied to clothing material The feeling of sultry cannot be eliminated during hot weather or excessive exercise. Further, the bending resistance is preferably 3 gf · cm or less, and if it is 3 gf · cm or more, the clothing material has high rigidity and is inferior in wearing feeling.
【Example】
EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not restrict | limited by these Examples. The evaluation methods described in the examples are based on the methods described below. The conditions and results of Examples and Comparative Examples are summarized in Table 1.
[0020]
Gas equilibrium adsorption amount: The adsorption amount with respect to toluene vapor of 1/10 saturation was measured by the method described in JIS-K-1477 (in this case, wt% was assigned as a unit of adsorption amount, and g / m 2 Was used).
Activated carbon dust amount: From one side of the sample of unit area (1m 2 ), suck the activated carbon for 3 minutes with a household vacuum cleaner (Hitachi cleaner CV-W75), quantify the activated carbon dust collected in the garbage pack, and calculate this as the dust amount. To do.
Flexibility: JIS-L-1096 6.22.2 According to B method (slide method).
Specific surface area: An adsorption isotherm of nitrogen is obtained and calculated by the BET method based on this.
Breathability: According to JIS-L-1018 6.34.
Thickness: According to JIS-L-1018 6.5.
[0021]
A knitted activated carbon cloth was prepared by the method described below. That is, a round knitted fabric having a basis weight of 220 g / m 2 made of a single yarn 2.2 dtex 20 s / 1 novolak phenol resin fiber spun yarn is heated in an inert atmosphere at 400 ° C. for 30 minutes, and then heated to 890 ° C. for 20 minutes. Heating was performed in an active atmosphere to advance carbonization, and then activated by heating at a temperature of 890 ° C. for 2 hours in an atmosphere containing 12% by volume of water vapor. The mass of the knitted fibrous activated carbon obtained was 125 g / m 2 , specific surface area 1400 m 2 / g, thickness 0.80 mm, and air permeability was 200 cm 3 / cm 2 · s with a water level gauge of 1.27 cm, The equilibrium adsorption amount of toluene was 56 g / m 2 .
[0022]
On the other hand, a tricot knitted fabric ( a protective layer of fibrous activated carbon cloth ) was prepared by the following method. Fully set polyester filaments (82.5 dtex, 36 filaments) on the front cage and polyester filaments (22 dtex, monofilament) on the back cage with a 28 gauge 2-sheet tricot machine. Front 1-2 / 1-0 The warp knitted fabric was knitted with the back 1-0 / 2-3 structure, then scoured by a conventional method, and further dyed with a disperse dye. The knitted fabric thus obtained had a thickness of 0.28 mm, a basis weight of 60 g / cm 2 , and an air permeability of 500 cm 3 / cm 2 · s.
[0023]
Using the knitted activated carbon cloth as an intermediate layer, both sides were laminated with the tricot knitted fabric and stitched by quilting at a 1 inch pitch. The resulting composite material, the mass 250 g / m 2, thickness 1.36 mm, breathability 180cm 3 / cm 2 · s, the equilibrium adsorption amount of toluene 56.3 g / m 2, bending resistance 2.08gf · cm The amount of activated carbon dust was 92 mg / m 2 .
[0024]
[Example 1]
The laminate material prepared in the item [0025] is pad-dried in a 4 wt% urethane binder resin (Meisei Chemical Industry Co., Ltd., Pascal V101) processing bath, and then fixed at 170 ° C., and the resin solid content is 1.03 wt%. Attached. Table 1 shows the activated carbon dust amount, gas equilibrium adsorption amount, and bending resistance of this material.
[0025]
[Example 2]
Implemented using a processing bath containing 0.5 wt% vinyl acetate binder resin (Meisei Chemical Industry Co., Ltd. Maycassette LC101) and 0.3 wt% cross-linking agent (Sumitomo Chemical Industries, Ltd. Sumtex Resin M-3) The same processing as in Example 1 was performed, and 0.13 wt% of the resin solid content was adhered. Table 1 shows the activated carbon dust amount, gas equilibrium adsorption amount, and bending resistance of this material.
[0026]
[Comparative Example 1]
The material before being treated with the binder is referred to as Comparative Example 1.
[0027]
[Comparative Example 2]
Using a 3 wt% ester-based binder resin (Takamatsu Yushi Co., Ltd. TK set 413) processing bath, the same processing as in Example 1 was performed, and 0.77 wt% was adhered as a resin solid content.
[0028]
[Comparative Example 3]
Using a 9 wt% urethane-based binder resin (Meisei Chemical Industry Co., Ltd., Pascal V101) processing bath, the same processing treatment as in Example 1 was performed, and 2.30 wt% was adhered as a resin solid content.
[0029]
[Table 1]
In Examples 1 and 2, the dust amount of the activated carbon is greatly reduced without deteriorating the adsorption performance of the activated carbon at all. On the other hand, in Comparative Example 2, although the amount of dust decreased, a decrease in flexibility was observed. About the comparative example 3, the big fall about adsorbability was recognized.
[0031]
【The invention's effect】
A laminated fabric in which the fibrous activated carbon cloth is sandwiched by a base material ( fibrous activated carbon cloth protective layer) excellent in breathability and flexibility is immersed in a water-dispersed binder resin processing bath (dip nip), dried, and dried. It is obtained by applying a fixing treatment (dry cure) to prevent falling off or scattering of activated carbon dust generated from fiber breakage or pulverization due to mechanical force applied to the fibrous activated carbon cloth, and also breathable and flexible. It is possible to obtain a fibrous active cloth having excellent properties and greatly contribute to the industrial world.
Claims (4)
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| JP2001199410A JP3646877B2 (en) | 2001-06-29 | 2001-06-29 | Quilted sheet containing fibrous activated carbon |
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| JP2001199410A JP3646877B2 (en) | 2001-06-29 | 2001-06-29 | Quilted sheet containing fibrous activated carbon |
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| JP3646877B2 true JP3646877B2 (en) | 2005-05-11 |
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| JP4876436B2 (en) * | 2005-05-26 | 2012-02-15 | 東洋紡績株式会社 | Protective materials and protective clothing |
| JP5768421B2 (en) * | 2011-03-16 | 2015-08-26 | 東洋紡株式会社 | Adsorption sheet |
| CN110614032B (en) * | 2019-09-26 | 2022-06-10 | 成都易态科技有限公司 | Preparation method of filter material |
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