JPH0138888B2 - - Google Patents

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Publication number
JPH0138888B2
JPH0138888B2 JP60268317A JP26831785A JPH0138888B2 JP H0138888 B2 JPH0138888 B2 JP H0138888B2 JP 60268317 A JP60268317 A JP 60268317A JP 26831785 A JP26831785 A JP 26831785A JP H0138888 B2 JPH0138888 B2 JP H0138888B2
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JP
Japan
Prior art keywords
fabric
fiber
activation
oxidized
activated carbon
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP60268317A
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Japanese (ja)
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JPS62133124A (en
Inventor
Hiroyasu Ogawa
Kenji Shimazaki
Fumito Morikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teijin Ltd
Original Assignee
Toho Rayon Co Ltd
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Filing date
Publication date
Application filed by Toho Rayon Co Ltd filed Critical Toho Rayon Co Ltd
Priority to JP60268317A priority Critical patent/JPS62133124A/en
Publication of JPS62133124A publication Critical patent/JPS62133124A/en
Publication of JPH0138888B2 publication Critical patent/JPH0138888B2/ja
Granted legal-status Critical Current

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  • Carbon And Carbon Compounds (AREA)
  • Inorganic Fibers (AREA)
  • Woven Fabrics (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

〔産業上の利用分野〕 本発明は、通気、通液時の圧力損失が少く、使
用時の形態保持性に優れた活性炭素繊維織物を安
定的に製造する方法に関するものである。 〔背景技術及び問題点〕 従来、ポリアクリロニトリル系、フエノールノ
ボラツク系、レーヨン系、ピツチ系などの活性炭
素繊維が知られており、これらは、フイラメン
ト、紡績糸、短繊維、フエルト、紙、織物、編物
などの形態で、気相系、液相系にて悪臭成分の除
去や溶剤回収の分野にて利用されている。活性炭
素繊維をシート状にて利用する場合、フエルト、
織物、編物などの形態にて、吸着材層を形成し、
被処理媒体をこの吸着材層を通過させて処理する
ことが行われるが、織物はフエルトに比較して強
度が高く、加工性に優れており、また編物に比較
して形態保持性に優れている。しかし織物におい
ても、高速度で生産性良く賦活する目的で、活性
炭素繊維織物の比表面積をより大きくしようとし
た場合、又は金属添着量を上げて酸化繊維織物を
賦活する場合、途中で、切断したり、微粉末が発
生し、製造工程が不安定化する。 また、得られた活性炭素繊維粗糸織物を充填積
層した場合、圧力損失は積層枚数(充填量)に応
じて加速度的に増加する。 〔発明の構成及び効果〕 本発明者らは、このような問題点について検討
の結果本発明に至つた。 すなわち、本発明は、酸化繊維を紡績して得
た、太さ0.5〜5番手で、かつ、より数50〜130
ケ/mのポリアクリロニトリル系酸化繊維糸を用
いた被覆係数11.0〜17.0の織物を、900〜1400℃
で賦活することを特徴とする活性炭素繊維織物の
製造方法に関する。 本発明において被覆係数とは、下記のとおり、
(糸の番手の逆数)と(織物中のタテ糸とヨコ糸
のインチ当りの本数の和)との積で示される。 被覆係数=(1/番手)×(織物中のタテ糸とヨコ糸の
インチ当りの本数の和) ここでの番手はメートル番手である。 かかる本発明により、前述の問題点を解決する
ことができる。 すなわち、本発明の方法により下記の効果が得
られる。 製造工程中での織物の部分切れ及び切断が皆
無となつた。 工程中の活性炭素繊維織物の微粉末の発生量
が激減した。 活性炭素繊維織物の充填積層時生じた圧力損
失増現象が少なくなつた。 本発明で使用されるアクリロニトリル系繊維と
しては、アクリロニトリルを少くとも60重量%以
上、好ましくは80〜98重量%を含む重合体又は共
重合体より得られた繊維である。この場合コモノ
マーとしては例えばアクリル酸、メタクリル酸、
スルホン酸又はこれらの塩類、酸クロライド類、
酸アミド類、ビニルアミドのn−置換誘導体、塩
化ビニル、塩化ビニリデン、α−クロロアクリロ
ニトリル、ビニルピリジン類、ビニルベンゼンス
ルホン酸、ビニルスルホン酸およびそのアルカリ
土類金属塩等がある。また例えば、アクリロニト
リル重合体を一部加水分解して得られた変性重合
体、アクリロニトリル重合体及び共重合体同志の
混合物から得られた繊維も使用される。 アクリロニトリル系繊維の繊度としては、特に
制限はないが、0.5〜15d(デニール)、特に0.7〜
7dのものが好ましい。0.5dより細い場合、繊維強
力が低く、特に賦活時および加工時活性炭素繊維
糸の切断及び毛羽の発生が増大する。 一方15dより太い場合、酸化処理系の紡積加工
がより困難となる。 それとともに糸の賦活収率及び吸着速度が減少
する。 酸化処理は、200〜400℃で行われ、最適温度は
225〜350℃の範囲である。 酸化処理時繊維に与えられる張力は、酸化温度
での収縮が酸化処理中、その温度における自由収
縮率の70〜90%になるようにするのが好ましい。
この値が70%未満の場合、トウが切断しやすく、
90%超の場合、賦活工程で繊維の機械的特性が低
下し、脆弱化する傾向がある。ここで自由収縮率
とは繊維に1mg/dの荷重をかけ、一定の温度で
熱収縮させた時の繊維の熱処理前の長さに対する
収縮した長さの割合である。 酸化処理に使用する媒体としては、従来法にお
けるものと同様のものが使用できる。すなわち、
0.2〜35容量%、好ましくは20〜25容量%の酸素
及び窒素、アルゴン、ヘリウム等の不活性ガスか
らなる混合ガスが使用される。 酸化処理に要する時間は、アクリロニトリル系
繊維の種類、すなわち、コモノマーの種類と量及
び酸化処理に使用する媒体の種類により一定でな
いが、酸化温度が高い程時間は短くてもよい。通
常0.5〜30時間、好ましくは1.0〜10時間であり、
酸素結合量が15重量%超になるまで酸化を行う。
酸素結合量がこの値より低い場合、賦活時切断が
生じ賦活収率が低下する。 酸素結合量は好ましくは16.5重量%以上であ
り、ほぼ23〜25重量%程度まで高めることができ
る。 酸素結合量は次式により求められる。 酸素結合量(重量%)=試料総重量−灰分重量−CHN合
計量/試料総重量−灰分重量×100 酸化処理を終了した酸化繊維に対し、下記に示
したリン化合物として0.005〜1重量%好ましく
は0.01〜0.2重量%の範囲で添着させるのがよい。 このようにすると賦活処理における賦活収率を
高めるとともに活性炭素繊維の強度、耐摩耗性、
吸着性を向上させることができる。かかる目的に
使用されるリン化合物としてはリン酸、メタリン
酸、ピロリン酸、亜リン酸等の無機リン化合物
や、アルキルもしくはアリールホスホネート、同
ホスフエート、同ホスフアイト等の有機リン化合
物が挙げられる。 かくして得られる酸化繊維を、ステープル紡績
又はトウ紡績により紡績加工し、太さ0.5〜5番
手、より数50〜130ケ/mの酸化繊維紡績糸を作
成する。紡績糸の太さが5番手超の場合、賦活時
切断したり、微粉末を発生したりする。 0.5番手未満の場合、紡績糸の強力が低いため、
次工程の織物加工が難しく、一方賦活後、これを
積層充填するとき積層枚数が多くなるにつれ圧力
損失値が、充填枚数(量)に比べ異常に増大す
る。 より数が50ケ/m未満の場合、紡績糸の強力が
低いために織物作成がより難しく、これを賦活し
た場合も微粉末が発生する。130ケ/m超の場合、
賦活時の収縮率の増大に伴い織物が部分切れを生
じたり、吸着素子として使用した場合、吸着速度
の低下を招く。 更に、この酸化繊維紡績糸は織物加工される
が、織形態としては平織、朱子織、杉綾織等が良
く、特に、形態の安定性を考慮に入れると平織が
より好ましい。 本発明においてポリアクリロニトリル系酸化繊
維糸を用いた織物は、前記で定義する被覆係数が
11.0〜17.0のものである。被覆係数が11.0未満の
場合、賦活前の織物の賦形性が低下するととも
に、賦活後の織物に関し、その賦形性が著しく低
下し、その吸着性能も低下する。また、17.0超の
場合、賦活時に賦活斑(むら)を生じ、加えて、
通液時の圧力損失が増大する。 該酸化繊維紡績糸の打ち込み本数はタテ、ヨコ
方向共に通常7〜28本/インチである。 打ち込み本数が7本未満の場合、賦活時に織物
の強度低下を生じたり、形くずれを生じやすい。
28本超の場合、吸着すべき成分の糸への拡散効率
が悪くなり、吸着量及び吸着速度の低下を招いた
り、圧力損失が高くなる。 本発明では所定の織物を900〜1400℃で賦活す
る。この温度範囲で賦活したとき本発明の目的が
達成される。 本発明の製造方法によつて得られた活性炭素繊
維織物の強度は、タテ、ヨコ共0.1〜10Kg/cmの
範囲で、従来のフエルトタイプの強度の10倍〜50
倍である。 また比表面積が1600m2/g以上でも強度が急激
に低下しないという特徴が認められた。 賦活方法としては、連続方式が望ましく、この
場合、より高温になるほど繊維の導入を高速化す
るためこれにともない、酸化繊維導入口からの空
気の抱き込みが生じ、賦活斑を発生するおそれが
ある。 これを避けるため、導入部のスリツトの開度の
調整、窒素ガスや水蒸気の導入等により、炉内圧
を0.002〜2Kg/cm2の範囲に保つのが好ましい。 炉内圧が0.002Kg/cm2未満又は負圧の場合著し
く賦活斑を生じ、繊維が灰化し、良好な製品の生
産が不可能となることがある。 一方極端に内圧を高くすると、スリツト部より
低温部へかけて、水蒸気が凝縮し、これによりス
リツト部が詰り賦活斑が生じやすくなる。賦活処
理における賦活ガスとしては、例えば水蒸気、一
酸化炭素、炭酸ガス等の活性ガスの1種若しくは
2種以上の混合ガス又はこれらと窒素、ヘリウ
ム、アルゴン等のガスとの混合ガスが使用され
る。賦活ガス中の活性ガスの濃度は、通常、5〜
100容量%、好ましくは20〜90容量%である。 酸化繊維の賦活処理は900〜1400℃の温度で行
われる。特に920〜1100℃が好ましい温度である。 〔実施例及び比較例〕 実施例 1 アクリロニトリル90重量%、アクリル酸メチル
10重量%からなるポリアクリロニトリル系繊維ト
ウ(トータルデニール45万デニール、単糸繊度
3d)を空気中260℃で1.0時間、更に270℃で1.0時
間、自由収縮率の75%になるような張力下で酸化
処理した。得られた酸化繊維をステープル紡績
し、1.2番手、より数88ケ/mの単糸を作成した。
更にこの単糸を用いタテ方向の糸の仕込み本数10
本/インチ、ヨコ方向の糸の打ち込み本数8本/
インチ、目付660g/m2被覆係数15の平織物を作
成した。この織物を、スチーム中1000℃にて5分
間賦活したところ何ら切断することなく、BET
−SA2000m2/gの活性炭素繊維織物を得た。 なお、タテ方向の引張り強度は3.7Kg/cm、ヨ
コ方向は1.0Kg/cm(JIS−L−1096)であつた。 この織物一層の圧力損失値を0.6m/secの線速
度下測定したところ4.2mmH2Oであつた。 次に、この織物を管径36mmのカラムに層高5
mm、嵩密度0.10g/c.c.で積層充填し、線速度0.25
m/secでベンゼン15000ppmのガスを通し2分後
の吸着量を測定したところ、77重量%であつた。 比較例 1(ポリアクリロニトリル系繊維を紡績
した例であつて、酸化繊維を紡績しない例) 実施例1と同じポリアクリロニトリル系繊維ト
ウを紡績した後、260℃で1.0時間、更に270℃で
1時間酸化処理し、酸化繊維単糸(1.2番手、よ
り数87ケ/m)を作成した。この単糸を用い、実
施例1と同様の平織物を作成し、これを実施例1
と同じ賦活条件にて賦活したところ、BET−
SA2000m2/gの平織物が得られた。 これのタテ方向の引張り強度は3.4Kg/cm、ヨ
コは0.7Kg/cmであつた。また一層の圧力損失は
4.0mmH2Oであつた。 次に、この織物を管径36mmのカラムに層高5
mm、嵩密度0.10g/c.c.で積層充填し、線速度0.25
m/secでベンゼン15000ppmのガスを通し2分後
の吸着量を測定したところ60重量%であつた。 比較例 2(同上) 実施例1と同じポリアクリロニトリル系繊維ト
ウを紡績し、更に織物加工し平織物(1番手、よ
り数77ケ/m、タテ方向打ち込み本数8本/イン
チ、ヨコ6本/インチ、目付570g/m2)を作成
した後、空気中で260℃で1.0時間、更に270℃1.0
時間酸化処理したところ、酸化処理途中で膠着切
断し、酸化繊維の平織物を得ることができなかつ
た。 比較例 3(活性炭素繊維を紡績した例であつて、
酸化繊維を紡績しない例) 実施例1と同じポリアクリロニトリル系繊維ト
ウを酸化し、更に実施例1と同じ賦活条件にて賦
活しBET−SA2000m2/gの活性炭素繊維トウを
作成した。 さらに、これを1.2番手の紡績糸を作成しよう
と試みたが紡績できず、目的の活性炭素繊維織物
を得ることができなかつた。 実施例 2 実施例1と同じポリアクリロニトリル系繊維を
実施例1と同一条件で酸化処理したトウを紡績加
工し、太さ、より数の異なる紡績糸(単糸)を作
成し、更に打ち込み本数を変え、被覆係数の異な
る酸化繊維織物を作成した。 次にこの織物を1000℃にてスチーム中賦活し、
BET−比表面積約2000m2/gの活性炭素繊維織
物を作成した。この繊維の製造時の状況及び得ら
れた活性炭素繊維織物の特性についてまとめたも
のを下記第1表に示す。第1表中、圧力損失と吸
着量の測定条件は第2表に示すとおりである。
[Industrial Field of Application] The present invention relates to a method for stably producing an activated carbon fiber fabric that has low pressure loss during aeration and liquid passage, and has excellent shape retention during use. [Background Art and Problems] Activated carbon fibers such as polyacrylonitrile, phenol novolak, rayon, and pitch are conventionally known. It is used in the fields of removing malodorous components and recovering solvents in gas phase and liquid phase systems in the form of , knitted fabrics, etc. When using activated carbon fiber in sheet form, felt,
Forming an adsorbent layer in the form of woven fabrics, knitted fabrics, etc.
The treatment medium is passed through this adsorbent layer, but woven fabrics are stronger and easier to process than felt, and have better shape retention than knitted fabrics. There is. However, even in textiles, when trying to increase the specific surface area of activated carbon fiber textiles for the purpose of activating them at high speed and with good productivity, or when increasing the amount of metal impregnated to activate oxidized fiber textiles, it is necessary to cut the textiles in the middle. Otherwise, fine powder will be generated, making the manufacturing process unstable. Further, when the obtained activated carbon fiber roving fabrics are filled and laminated, the pressure loss increases at an accelerating rate according to the number of laminated sheets (filling amount). [Structure and Effects of the Invention] The present inventors have arrived at the present invention as a result of studying these problems. That is, the present invention is manufactured by spinning oxidized fibers, which have a thickness of 0.5 to 5, and have a diameter of 50 to 130.
A woven fabric with a coverage factor of 11.0 to 17.0 using polyacrylonitrile oxidized fiber yarn of
The present invention relates to a method for producing an activated carbon fiber fabric, which is characterized in that the fabric is activated by . In the present invention, the coverage factor is as follows:
It is expressed as the product of (the reciprocal of the thread count) and (the sum of the number of warp and weft threads per inch in the fabric). Covering factor = (1/count) x (sum of the number of warp and weft yarns per inch in the fabric) The count here is the metric count. According to the present invention, the above-mentioned problems can be solved. That is, the method of the present invention provides the following effects. There are no partial breaks or cuts in the fabric during the manufacturing process. The amount of fine powder generated from activated carbon fiber fabric during the process has been drastically reduced. The increased pressure loss phenomenon that occurred when stacking activated carbon fiber fabrics was reduced. The acrylonitrile fiber used in the present invention is a fiber obtained from a polymer or copolymer containing at least 60% by weight of acrylonitrile, preferably 80 to 98% by weight. In this case, examples of comonomers include acrylic acid, methacrylic acid,
Sulfonic acids or their salts, acid chlorides,
Examples include acid amides, n-substituted derivatives of vinylamide, vinyl chloride, vinylidene chloride, α-chloroacrylonitrile, vinylpyridines, vinylbenzenesulfonic acid, vinylsulfonic acid, and alkaline earth metal salts thereof. For example, fibers obtained from modified polymers obtained by partially hydrolyzing acrylonitrile polymers, and mixtures of acrylonitrile polymers and copolymers may also be used. There is no particular limit to the fineness of acrylonitrile fibers, but 0.5 to 15 d (denier), especially 0.7 to 15 d (denier)
7d is preferred. If it is thinner than 0.5d, the fiber strength will be low, and the occurrence of breakage and fluffing of the activated carbon fiber yarn will increase especially during activation and processing. On the other hand, if it is thicker than 15d, spinning processing using an oxidation treatment system becomes more difficult. At the same time, the activation yield and adsorption rate of the yarn decrease. Oxidation treatment is carried out at 200-400℃, the optimum temperature is
The temperature ranges from 225 to 350°C. The tension applied to the fiber during the oxidation treatment is preferably such that the shrinkage at the oxidation temperature is 70 to 90% of the free shrinkage rate at that temperature during the oxidation treatment.
If this value is less than 70%, the tow is easy to cut,
If it exceeds 90%, the activation process tends to reduce the mechanical properties of the fibers and make them brittle. Here, the free shrinkage rate is the ratio of the shrinked length to the length of the fiber before heat treatment when the fiber is heat-shrinked at a constant temperature under a load of 1 mg/d. As the medium used for the oxidation treatment, the same medium as in the conventional method can be used. That is,
A gas mixture consisting of 0.2 to 35% by volume, preferably 20 to 25% by volume of oxygen and an inert gas such as nitrogen, argon, helium, etc. is used. The time required for the oxidation treatment varies depending on the type of acrylonitrile fiber, that is, the type and amount of the comonomer, and the type of medium used for the oxidation treatment, but the higher the oxidation temperature, the shorter the time may be. Usually 0.5 to 30 hours, preferably 1.0 to 10 hours,
Oxidation is carried out until the amount of oxygen binding exceeds 15% by weight.
When the amount of oxygen bonds is lower than this value, cleavage occurs during activation and the activation yield decreases. The amount of oxygen bonding is preferably 16.5% by weight or more, and can be increased to approximately 23 to 25% by weight. The amount of oxygen bonding is determined by the following formula. Oxygen bond amount (wt%) = total sample weight - ash weight - total amount of CHN / total sample weight - ash weight x 100 Preferably 0.005 to 1% by weight of the phosphorus compound shown below based on the oxidized fiber after oxidation treatment It is preferable to apply the compound in an amount of 0.01 to 0.2% by weight. In this way, the activation yield in the activation treatment is increased, and the strength, abrasion resistance, and
Adsorption properties can be improved. Phosphorus compounds used for this purpose include inorganic phosphorus compounds such as phosphoric acid, metaphosphoric acid, pyrophosphoric acid, and phosphorous acid, and organic phosphorus compounds such as alkyl or aryl phosphonates, phosphates, and phosphites. The thus obtained oxidized fibers are spun by staple spinning or tow spinning to produce oxidized fiber spun yarn with a thickness of 0.5 to 5 yarns and a number of 50 to 130 fibers/m. If the thickness of the spun yarn exceeds No. 5, it may break during activation or generate fine powder. If the yarn count is less than 0.5, the strength of the spun yarn is low;
It is difficult to process the fabric in the next step, and on the other hand, when the fabric is laminated and packed after activation, as the number of laminated sheets increases, the pressure loss value increases abnormally compared to the number (amount) of packed sheets. When the number of yarns is less than 50 yarns/m, it is difficult to create a fabric because the strength of the spun yarn is low, and even when activated, fine powder is generated. If it exceeds 130 pieces/m,
As the shrinkage rate increases during activation, the fabric may partially break, and when used as an adsorption element, the adsorption rate will decrease. Further, this oxidized fiber spun yarn is processed into a textile, and the weaving form is preferably plain weave, satin weave, herring twill weave, etc., and plain weave is particularly preferable in consideration of the stability of the form. In the present invention, the fabric using the polyacrylonitrile oxidized fiber yarn has a coverage factor defined above.
It is from 11.0 to 17.0. When the coverage coefficient is less than 11.0, the shapeability of the fabric before activation is reduced, and the shapeability of the fabric after activation is significantly reduced, and its adsorption performance is also reduced. In addition, if it exceeds 17.0, activation spots (unevenness) will occur during activation, and in addition,
Pressure loss during fluid flow increases. The number of oxidized fiber spun yarns is usually 7 to 28 yarns/inch in both the vertical and horizontal directions. If the number of strands is less than 7, the strength of the woven fabric is likely to decrease or the fabric may become deformed during activation.
If the number exceeds 28, the diffusion efficiency of the component to be adsorbed into the threads will be poor, resulting in a decrease in the adsorption amount and adsorption rate, and a high pressure loss. In the present invention, a predetermined fabric is activated at 900 to 1400°C. The object of the present invention is achieved when activated within this temperature range. The strength of the activated carbon fiber fabric obtained by the manufacturing method of the present invention is in the range of 0.1 to 10 kg/cm both vertically and horizontally, which is 10 to 50 times the strength of conventional felt type.
It's double. It was also observed that the strength did not drop sharply even when the specific surface area was 1600 m 2 /g or more. As the activation method, a continuous method is preferable; in this case, the higher the temperature, the faster the introduction of the fibers, which may cause air to be trapped from the oxidized fiber introduction port and cause activation spots. . In order to avoid this, it is preferable to maintain the furnace pressure within the range of 0.002 to 2 kg/cm 2 by adjusting the opening of the slit in the introduction section, introducing nitrogen gas or water vapor, etc. If the furnace pressure is less than 0.002 Kg/cm 2 or negative pressure, significant activation unevenness may occur, the fibers may ash, and it may become impossible to produce a good product. On the other hand, if the internal pressure is made extremely high, water vapor condenses from the slit section to the lower temperature section, which clogs the slit section and tends to cause activation unevenness. As the activation gas in the activation process, for example, a mixed gas of one or more active gases such as water vapor, carbon monoxide, and carbon dioxide, or a mixed gas of these and a gas such as nitrogen, helium, and argon is used. . The concentration of active gas in the activation gas is usually 5 to 5.
100% by volume, preferably 20-90% by volume. The activation treatment of oxidized fibers is carried out at a temperature of 900-1400°C. Particularly preferred temperature is 920 to 1100°C. [Examples and Comparative Examples] Example 1 90% by weight of acrylonitrile, methyl acrylate
Polyacrylonitrile fiber tow consisting of 10% by weight (total denier 450,000 denier, single yarn fineness
3d) was oxidized in air at 260°C for 1.0 hour and then at 270°C for 1.0 hour under tension such that the free shrinkage rate was 75%. The obtained oxidized fibers were staple-spun to produce a single yarn with a count of 1.2 and a twist count of 88 yarns/m.
Furthermore, using this single yarn, the number of yarns in the vertical direction is 10.
Threads/inch, Number of threads driven in the horizontal direction: 8 threads/inch
A plain woven fabric with a fabric weight of 660 g/m 2 and a coverage factor of 15 was prepared. When this fabric was activated in steam at 1000℃ for 5 minutes, BET
- An activated carbon fiber fabric with an SA of 2000 m 2 /g was obtained. The tensile strength in the vertical direction was 3.7 kg/cm, and the tensile strength in the horizontal direction was 1.0 kg/cm (JIS-L-1096). The pressure loss value of one layer of this fabric was measured at a linear velocity of 0.6 m/sec and was found to be 4.2 mmH 2 O. Next, this fabric was placed in a column with a tube diameter of 36 mm and a layer height of 5 mm.
mm, bulk density 0.10g/cc, linear velocity 0.25
A gas containing 15,000 ppm of benzene was passed through the tube at m/sec, and the amount of adsorption after 2 minutes was measured, and it was found to be 77% by weight. Comparative Example 1 (Example in which polyacrylonitrile fibers were spun, but oxidized fibers were not spun) After spinning the same polyacrylonitrile fiber tow as in Example 1, it was heated at 260°C for 1.0 hour and then at 270°C for 1 hour. Oxidation treatment was performed to produce oxidized fiber single yarn (1.2 count, number of twists: 87 strands/m). Using this single yarn, a plain woven fabric similar to that in Example 1 was created;
When activated under the same activation conditions, BET-
A plain woven fabric with an SA of 2000 m 2 /g was obtained. The tensile strength in the vertical direction was 3.4 Kg/cm, and the tensile strength in the horizontal direction was 0.7 Kg/cm. Furthermore, the pressure loss is
It was 4.0mmH 2 O. Next, this fabric was placed in a column with a tube diameter of 36 mm and a layer height of 5 mm.
mm, bulk density 0.10g/cc, linear velocity 0.25
A gas containing 15,000 ppm of benzene was passed through the tube at m/sec, and the amount of adsorption measured after 2 minutes was 60% by weight. Comparative Example 2 (same as above) The same polyacrylonitrile fiber tow as in Example 1 was spun and further woven to produce a plain weave (1st count, number of yarns 77 pieces/m, number of yarns in the vertical direction 8 pieces/inch, 6 pieces/inch in the horizontal direction). inch, fabric weight 570g/m 2 ), then heated at 260℃ in air for 1.0 hour, and then heated at 270℃ for 1.0 hour.
When the oxidation treatment was carried out for a period of time, the oxidized fibers were stuck and cut during the oxidation treatment, and a plain woven fabric of oxidized fibers could not be obtained. Comparative example 3 (an example of spinning activated carbon fiber,
Example of not spinning oxidized fiber) The same polyacrylonitrile fiber tow as in Example 1 was oxidized and further activated under the same activation conditions as in Example 1 to create an activated carbon fiber tow of BET-SA 2000 m 2 /g. Furthermore, an attempt was made to create a spun yarn with a count of 1.2 from this, but it was not possible to spin it, and the desired activated carbon fiber fabric could not be obtained. Example 2 The same polyacrylonitrile fiber as in Example 1 was oxidized tow tow under the same conditions as in Example 1, and spun yarns (single yarns) with different thicknesses and twists were created. oxidized fiber fabrics with different coverage coefficients were created. Next, this fabric was activated in steam at 1000℃,
BET - An activated carbon fiber fabric with a specific surface area of approximately 2000 m 2 /g was prepared. Table 1 below summarizes the conditions during production of this fiber and the properties of the obtained activated carbon fiber fabric. In Table 1, the measurement conditions for pressure loss and adsorption amount are as shown in Table 2.

【表】 〓注〓 *〓水中差を充填目付で除した値
[Table] 〓Note〓 *〓Value obtained by dividing the difference in water by the filling weight

【表】【table】

Claims (1)

【特許請求の範囲】 1 酸化繊維を紡績して得た、太さ0.5〜5番手
で、かつ、より数50〜130ケ/mのポリアクリロ
ニトリル系酸化繊維糸を用いた被覆係数11.0〜
17.0の織物を、900〜1400℃で賦活することを特
徴とする活性炭素繊維織物の製造方法。 ただし、 被覆係数=(1/番手)×(織物中のタテ糸とヨコ糸の
インチ当りの本数の和)
[Scope of Claims] 1. A coverage factor of 11.0 to 11.0 using a polyacrylonitrile oxidized fiber yarn obtained by spinning oxidized fibers and having a thickness of 0.5 to 5 and a number of 50 to 130 threads/m.
A method for producing an activated carbon fiber fabric, which comprises activating a 17.0 fabric at 900 to 1400°C. However, coverage factor = (1/count) x (sum of the number of warp and weft yarns per inch in the fabric)
JP60268317A 1985-11-30 1985-11-30 Production of woven fabric of activated carbon fibers Granted JPS62133124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60268317A JPS62133124A (en) 1985-11-30 1985-11-30 Production of woven fabric of activated carbon fibers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60268317A JPS62133124A (en) 1985-11-30 1985-11-30 Production of woven fabric of activated carbon fibers

Publications (2)

Publication Number Publication Date
JPS62133124A JPS62133124A (en) 1987-06-16
JPH0138888B2 true JPH0138888B2 (en) 1989-08-17

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Country Link
JP (1) JPS62133124A (en)

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Publication number Priority date Publication date Assignee Title
FR2760759B1 (en) * 1997-03-14 1999-06-11 Carbone Ind PROCESS FOR PRODUCING ACTIVATED TEXTS IN CARBON FIBERS
JP6261282B2 (en) * 2013-10-21 2018-01-17 旭化成メディカル株式会社 Drug removal filter, drug removal system, and drug removal method
DE202015004713U1 (en) 2015-07-02 2015-07-17 Plamen Kravaev Continuously fiber-reinforced non-woven fabrics of activated carbon fibers

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