JP2590620B2 - Carbon fiber production method - Google Patents
Carbon fiber production methodInfo
- Publication number
- JP2590620B2 JP2590620B2 JP3037564A JP3756491A JP2590620B2 JP 2590620 B2 JP2590620 B2 JP 2590620B2 JP 3037564 A JP3037564 A JP 3037564A JP 3756491 A JP3756491 A JP 3756491A JP 2590620 B2 JP2590620 B2 JP 2590620B2
- Authority
- JP
- Japan
- Prior art keywords
- entangled
- connection
- yarn
- oxidation reaction
- precursor
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
- B65H69/06—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing
- B65H69/061—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing using pneumatic means
- B65H69/066—Wet splicing, i.e. adding liquid to the splicing room or to the yarn ends preparing rooms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
- B65H2701/314—Carbon fibres
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は炭素繊維の製造方法、特
に操業性ないし生産性および品質安定化に優れた炭素繊
維の連続的製造法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing carbon fiber, and more particularly to a method for continuously producing carbon fiber excellent in operability, productivity and quality stability.
【０００２】[0002]
【従来の技術】炭素繊維の製造原料としては、アクリル
系，ピッチ系，セルロース系，ポリビニルアルコール系
など各種の繊維糸条が用いられているが、これらの繊維
原料、すなわち、プレカーサはボビンやスプールに巻き
上げられたり、箱体内に折りたたみ積層して供給される
のが一般的である。従って、これらのプレカーサを連続
的に焼成し炭素繊維に転換するためには、上記巻き上げ
られたり、折りたたみ積層されているプレカーサの繊維
端部を何らかの手段で接続する必要がある。2. Description of the Related Art Various types of fiber yarns such as acrylic, pitch, cellulose and polyvinyl alcohol are used as raw materials for producing carbon fibers. These fiber raw materials, ie, precursors, are bobbins and spools. It is generally supplied by being wound up or folded and laminated in a box body. Therefore, in order to continuously bake these precursors and convert them into carbon fibers, it is necessary to connect the fiber ends of the wound or folded and laminated precursors by some means.
【０００３】このプレカーサ同士の接続部は、一般に接
続していない部分に比し糸束が太く、かつ、きつく締め
付けられた状態となり易い。このためプレカーサの耐炎
化工程では、発生する反応熱が十分放熱されず、蓄熱に
より更に激しい酸化反応が起こり、遂には焼成中の糸切
れ、焼損などの原因となるのである。[0003] The connecting portion between the precursors generally has a thicker yarn bundle and is more likely to be tightly tightened than a portion not connected. For this reason, in the flame-proofing step of the precursor, the generated reaction heat is not sufficiently dissipated, and a more intense oxidation reaction occurs due to heat storage, which eventually causes yarn breakage and burning during firing.
【０００４】そこでこのようなトラブルを回避し、操業
性を向上させるために、特公昭５３−２３４１１号公報
にはプレカーサを結び合わせて耐炎化した後、結び目を
切断除去し、改めて結び直して炭化する方法、特開昭５
６−３７３１５号公報に記載のプレカーサ両端部を予め
熱処理し、特殊な結び方で接続して焼成する方法、特公
平１−１２８５０号公報にはプレカーサ両端部を絡合に
より一体的に接続する方法、また特開昭５４−５０６２
４号公報にはプレカーサ接合部をジエステル油，シリコ
ン油，ハロゲン化炭化水素油あるいは鉱油などのような
耐熱性化合物で被覆して酸素を遮断し、酸化反応を抑制
する方法が提案されている。[0004] In order to avoid such troubles and improve operability, Japanese Patent Publication No. 53-23411 discloses a method in which a precursor is tied to make it flame-resistant, the knot is cut and removed, and the knot is re-tied and carbonized again. Method, Japanese Unexamined Patent Publication No.
No. 6-37315, a method in which both ends of the precursor are heat-treated in advance, and a method of connecting and firing in a special manner, and a method in which both ends of the precursor are integrally connected by entanglement, Also, JP-A-54-5062
Japanese Patent Application Laid-Open No. 4 (1999) -1994 proposes a method in which a precursor junction is coated with a heat-resistant compound such as a diester oil, a silicon oil, a halogenated hydrocarbon oil or a mineral oil to block oxygen and suppress an oxidation reaction.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、結び目
を一旦耐炎化した後、その結び目部分を切断除去する方
法、プレカーサ両端部を予め熱処理し、特殊な結び方で
接続して焼成する方法については、いずれもプレカーサ
を結び合わせるという手作業を必要とし、作業性が著し
く低下するばかりか、接続されたプレカーサの結び目の
大きさや形状などが不揃いになり、多数本のプレカーサ
を同時に焼成する際に一部の結び目が焼損もしくは切断
する危険性がある。However, the method of cutting and removing the knot portion after the knot is once made flame-resistant and the method of heat-treating both ends of the precursor in advance and connecting and firing by a special knotting method are as follows. Also requires manual work to combine the precursors, which not only significantly reduces the workability, but also makes the size and shape of the knots of the connected precursors uneven, so that when firing a large number of precursors at the same time, some There is a risk of the knot burning or cutting.
【０００６】またプレカーサ両端部を絡合により一体的
に接続する方法では接続部にコブ状の結び目が形成され
ることがなく、接続部の太さ（厚さ），繊維の集束密度
が小さくなり焼成時の糸条通過性が改善されるものの、
プレカーサの太デニール化にともない耐炎化時の発熱量
も増加するため、耐炎化・炭化工程を連続的に通糸する
にはプレカーサの太デニール化に限界がある。In the method of integrally connecting both ends of the precursor by entanglement, a bump-like knot is not formed at the connection portion, and the thickness (thickness) of the connection portion and the convergence density of the fiber are reduced. Although the yarn permeability during firing is improved,
Since the calorific value at the time of flame resistance increases with increasing the denier of the precursor, there is a limit in increasing the thickness of the precursor to a continuous threading in the flame resistance and carbonization step.
【０００７】一方、接続部を耐熱性化合物で被覆して酸
素を遮断し、酸化反応を抑制する方法では、耐熱性化合
物で被覆した部分は酸素が供給されないために耐炎化が
進まず、炭化工程を通過する際に焼け切れるという問題
から、プレカーサ接続部が耐炎化工程を通過した後、生
産を一次中断して炭化以降の工程を再度通糸し直さなけ
ればならないという欠点がある。On the other hand, in the method in which the connection portion is covered with a heat-resistant compound to block oxygen and suppress the oxidation reaction, the portion covered with the heat-resistant compound is not supplied with oxygen, so that the flame resistance does not progress, and the carbonization process is not performed. There is a disadvantage that after the precursor connection has passed through the flameproofing process, the production has to be temporarily interrupted and the process after carbonization has to be repeated again from the problem of burning out when passing through.
【０００８】本発明者らは上記欠点のない炭素繊維の製
造方法について鋭意検討した結果、本発明に到達したの
である。すなわち、本発明の課題はプレカーサの末端接
続部分が焼成工程において、焼切れなど断糸することな
く、連続的に耐炎化、炭化することができる、作業性な
いし生産性に優れた炭素繊維の製造方法を提供すること
にある。The inventors of the present invention have made intensive studies on a method for producing a carbon fiber free from the above-mentioned disadvantages, and as a result, have reached the present invention. That is, an object of the present invention is to produce carbon fibers excellent in workability or productivity in which the terminal connection portion of the precursor can be continuously flame-resistant and carbonized without breaking such as burnout in the firing step. It is to provide a method.
【０００９】本発明の上記課題は、 （１）炭素化可能な繊維糸条の末端を相互に絡合接続
し、次に該繊維糸条の接続部に、ホウ酸および亜硫酸ナ
トリウムから選ばれた少なくとも一種の酸化反応抑制剤
を付与し、しかる後焼成することを特徴とする炭素繊維
の製造方法、 （２）炭素化可能な糸条の末端を重ね合わせ、ホウ酸お
よび亜流酸ナトリウムから選ばれた少なくとも一種の酸
化反応抑制剤を混入した水溶液を用いて高圧水流処理に
より絡合接続し、しかる後焼成することを特徴とする炭
素繊維の製造方法によって解決することができる。The above objects of the present invention are as follows: (1) The ends of the carbonizable fiber yarns are entangled with each other, and then the connecting portion of the fiber yarns is selected from boric acid and sodium sulfite. A carbon fiber production method characterized by applying at least one kind of oxidation reaction inhibitor, followed by firing; (2) superposing the ends of the carbonizable yarn and selecting from boric acid and sodium sulfite In addition, the problem can be solved by a method for producing carbon fibers, which comprises entangled and connected by high-pressure water treatment using an aqueous solution mixed with at least one kind of oxidation reaction inhibitor, and then firing.
【００１０】すなわち、本発明におけるプレカーサと
は、アクリル系、セルロース系、ポリビニルアルコール
系繊維およびピッチ系繊維などである。That is, the precursor in the present invention includes acrylic, cellulose, polyvinyl alcohol-based fibers and pitch-based fibers.
【００１１】これらの接続方法は、プレカーサの末端を
重ね合せて，重ね合せ部分を形成させ、その重ね合せ部
分に高速流体による絡合処理を施し、プレカーサの末端
同士を互いに一体的に接続させる。この場合の絡合処理
には、例えば特公平１−１２８５０号公報に開示する絡
合処理が好ましく適用できる。すなわち、プレカーサの
末端同士を好ましくは１０〜６０cm、より好ましくは３
０〜４０cm程度互いに重ね合せ、その重ね合せ部分に２
〜６Kg／cm2 −Ｇ程度の加圧流体（たとえば，加圧エア
ー）、あるいは水または水溶液の高圧液流を０．５〜５
mmφの細孔から噴射することによって絡合接続を行な
う。この細孔は糸条の長手方向の同一部分に対して２〜
４本の高圧流体があたるように複数孔を配すると、交絡
効果を一層向上させることができる。In these connection methods, the ends of the precursors are overlapped to form an overlapped portion, and the overlapped portion is subjected to an entanglement process using a high-speed fluid, so that the ends of the precursors are integrally connected to each other. In this case, for example, the entanglement process disclosed in Japanese Patent Publication No. 1-1850 may be preferably applied. That is, the ends of the precursors are preferably 10 to 60 cm, more preferably 3 to 60 cm.
Overlap each other about 0-40cm, and 2
Pressurized fluid (for example, pressurized air) of about 6 kg / cm 2 -G, or
An entangled connection is made by injecting through a hole of mmφ. This pore is 2 to the same part in the longitudinal direction of the yarn.
When a plurality of holes are arranged so that four high-pressure fluids are applied, the confounding effect can be further improved.
【００１２】このような絡合接続手段によれば、接続部
にコブ状の結び目が形成しないことから耐炎化以降の糸
条通過性を一段と向上させることができる。According to such an entangled connecting means, since a knot-shaped knot is not formed at the connecting portion, it is possible to further improve the yarn passage property after the flame resistance.
【００１３】またプレカーサの接続部に付与する酸化反
応抑制剤には、ホウ酸、亜硫酸ナトリウムが有効であ
り、これらは単体で、あるいは数種類を組み合わせて用
いることができる。上記酸化反応抑制剤の付着量は接続
部付近の繊維重量に対して好ましくは０．１〜１５重量
％、より好ましくは０．５〜２重量％の範囲である。こ
の付着量が０．１重量％に達しないときは酸化反応抑制
効果が減少し、一方、１５重量％を越えるときは繊維同
士が融着し、炭化工程を連続して通糸することが困難に
なる場合があるので、好ましくない。[0013] Boric acid and sodium sulfite are effective as the oxidation reaction inhibitor to be applied to the connecting portion of the precursor, and these can be used alone or in combination of several kinds. The amount of the oxidation reaction inhibitor attached is preferably in the range of 0.1 to 15% by weight, more preferably 0.5 to 2% by weight, based on the weight of the fiber near the connection portion. When the amount does not reach 0.1% by weight, the effect of suppressing the oxidation reaction decreases. On the other hand, when the amount exceeds 15% by weight, the fibers are fused to each other, making it difficult to continuously pass the carbonization step. This is not preferable because it may result in
【００１４】また酸化反応抑制剤は適当な溶媒に溶かし
て任意の濃度に調整する。その調整液の接続部への付与
方法には、浸漬、塗布、スプレー等いずれの方法であっ
てもよい。The oxidation reaction inhibitor is dissolved in an appropriate solvent and adjusted to an arbitrary concentration. The method of applying the adjusting liquid to the connection portion may be any of dipping, coating, spraying, and the like.
【００１５】[0015]
【実施例】以下、本発明を実施例により、さらに詳細に
説明する。実施例１、比較例１ 単糸繊度１ｄ，フィラメント数１２，０００のアクリル
系長繊維糸条を末端同士約４０cm程度重ね合せ、図１に
示す加圧流体絡合装置を用い、エアー圧が４Kg／cm2 −
Ｇのもとで、エアー交絡による接続サンプルを作製した
（図中１，１´は被処理糸条、２は絡合処理空間、３は
糸条挿入口、４は加圧流体（本例ではエアー）噴出口で
ある）。The present invention will be described below in more detail with reference to examples. Example 1, Comparative Example 1 Acrylic long fiber yarns having a single yarn fineness of 1d and a filament number of 12,000 were overlapped with each other by about 40 cm at each end, and the air pressure was 4 kg using the pressurized fluid entanglement apparatus shown in FIG. / Cm 2 −
Under G, a connection sample was produced by air entanglement (in the figure, 1 and 1 ′ are yarns to be processed, 2 is an entangled space, 3 is a yarn insertion port, 4 is a pressurized fluid (in this example, Air) is the spout).
【００１６】この接続サンプルを表１に示す酸化反応抑
制剤の５重量％水溶液に浸漬した後、熱風が循環してい
る耐炎化炉に１．０ｍ／分でフィードしながら炉内温度
を徐々にアップし、接続部が焼け切れるときの炉内温度
を測定した。After this connection sample was immersed in a 5% by weight aqueous solution of an oxidation reaction inhibitor shown in Table 1, the temperature inside the furnace was gradually increased while being fed at 1.0 m / min to an oxidizing furnace in which hot air was circulating. The furnace temperature was measured when the connection was burned out.
【００１７】なお比較のため、上記接続サンプルに酸化
反応抑制剤処理を施さなかった以外は、同様に耐炎化炉
で接続部が焼け切れるときの炉内温度を測定した。これ
らの結果を表１に示す。For comparison, the furnace temperature when the connection was burned out in the oxidizing furnace was measured in the same manner except that the above-mentioned connection sample was not subjected to the oxidation reaction inhibitor treatment. Table 1 shows the results.
【００１８】[0018]
【表１】 [Table 1]
【００１９】実施例２ 実施例１におけるエアー絡合処理した接続サンプルをホ
ウ酸濃度の異なるホウ酸水溶液中に夫々浸漬し、表２に
示すようにホウ酸付着量の異なる接続サンプルを作製し
た。Example 2 The connection samples subjected to the air entanglement treatment in Example 1 were immersed in boric acid aqueous solutions having different concentrations of boric acid, respectively, to produce connection samples having different amounts of boric acid as shown in Table 2.
【００２０】次に、そのホウ酸処理した各接続サンプル
を、熱風が循環している耐炎化炉に１．０ｍ／分でフィ
ードしながら炉内温度を徐々にアップし、接続部が焼け
切れるときの炉内温度を測定した。これらの結果を表２
に示す。Next, while the boric acid-treated connection samples are fed at 1.0 m / min to a stabilization furnace in which hot air is circulating, the furnace temperature is gradually increased, and the connection portion is burned out. Of the furnace was measured. Table 2 shows these results.
Shown in
【００２１】[0021]
【表２】 [Table 2]
【００２２】実施例３、比較例２ 実施例１におけるエアー絡合処理した接続サンプルを常
温飽和のホウ酸水溶液中に浸漬した（ホウ酸付着量１．
５重量％）。Example 3 and Comparative Example 2 The air-entangled connection sample in Example 1 was immersed in an aqueous solution of boric acid saturated at room temperature (the amount of boric acid deposited was 1.
5% by weight).
【００２３】次に、そのホウ酸処理した接続サンプル
を、 ２４０℃の熱風が循環している耐炎化炉に１．０
ｍ／分でフィードし、炉の上下部に設置されたローラに
よってジグザグ移行させて１５０分間滞留させた後連続
的に取り出し、耐炎化工程の糸条通過率を測定した。Next, the connection sample treated with boric acid was placed in a stabilization furnace in which hot air of 240 ° C. was circulated for 1.0 hour.
The feed was performed at a rate of m / min, and zigzag-transferred by rollers provided at the upper and lower portions of the furnace. After being retained for 150 minutes, it was continuously taken out, and the yarn passage rate in the oxidization process was measured.
【００２４】次に、この耐炎化処理した接続サンプルを
Ｎ2 で充満された実質的加熱部が５００〜１５００℃の
温度分布を有する炭化炉に１．０ｍ／分で導入し、１分
間の熱処理を行い炭化炉における糸条通過率を測定し
た。Next, the oxidized connection sample is introduced at 1.0 m / min into a carbonization furnace having a substantial heating section filled with N 2 and having a temperature distribution of 500 to 1500 ° C., and heat-treated for 1 minute. , And the yarn passage rate in the carbonization furnace was measured.
【００２５】ここでいう糸条通過率とは、上記耐炎化工
程，炭化工程に糸条接続部を導入、熱処理した場合にそ
れぞれの工程で切断することなしに通過した接続部の数
の百分率をもって表したものである。The yarn passing rate as used herein is defined as a percentage of the number of connecting parts that have passed without cutting in each step when a yarn connecting part is introduced and heat-treated in the above-described flame-proofing step and carbonizing step. It is a representation.
【００２６】なお比較のため、上記接続サンプルにホウ
酸処理を施さなかった以外は、上記同様にして耐炎化お
よび炭化工程における糸条通過率を測定した。それらの
結果を表３に示す。For comparison, the yarn passage rate in the flame-proofing and carbonization steps was measured in the same manner as described above, except that the connection sample was not subjected to the boric acid treatment. Table 3 shows the results.
【００２７】[0027]
【表３】 [Table 3]
【００２８】実施例４ 実施例１で用いたアクリル系長繊維糸条を末端同士約４
０cm重ね合せ、高圧ポンプにより加圧したホウ酸５％水
溶液を、５０Kg／cm2 の高圧水流として、図１に示す加
圧流体絡合装置の細孔より噴射し接続した。Example 4 Acrylic long fiber yarns used in Example 1 were applied at about 4
A 5% aqueous solution of boric acid pressurized by a 0 cm superposed and high pressure pump was injected as a high pressure water flow of 50 kg / cm 2 from the pores of the pressurized fluid entanglement apparatus shown in FIG. 1 and connected.
【００２９】得られた接続サンプルを２５０℃の熱風が
循環している耐炎化炉で処理し、引続き窒素雰囲気中１
５００℃で１分間炭化処理した。糸条の処理速度は１ｍ
／分とした。接続部分は、これらの処理工程通過上に全
く問題がなく、安定して炭素繊維製造が遂行できた。The obtained connection sample was treated in a flame stabilizing furnace in which hot air of 250 ° C. was circulated, and then the sample was placed in a nitrogen atmosphere.
Carbonization treatment was performed at 500 ° C. for 1 minute. Processing speed of yarn is 1m
/ Min. The connection portion had no problem in passing these processing steps, and carbon fiber production could be stably performed.
【００３０】[0030]
【発明の効果】本発明によれば、次のよう
な多くの優れた効果が得られる。 （１）プレカーサ同士の絡合接続部分の過度な酸化反応
が抑制されるため、接続部分の耐屈曲性の低下が小さ
く、特に炭化工程の糸条通過性が向上する。According to the present invention, many excellent effects as described below can be obtained. (1) Since the excessive oxidation reaction at the entangled connection portion between the precursors is suppressed, a decrease in the bending resistance of the connection portion is small, and in particular, the yarn passing property in the carbonization step is improved.
【００３１】（２）接続部を含む部分を連続的に耐炎化
・炭化することができるので、作業性ないし生産性が大
幅に向上する。(2) Since the portion including the connection portion can be continuously made flame-resistant and carbonized, workability and productivity are greatly improved.
【００３２】（３）プレカーサを交換する際、絡合接続
手段の採用により、接続部のあるプレカーサであっても
連続的に耐炎化・炭化工程に通糸できるため、工程条件
の変化幅が小さくなる。ひいては得られる炭素繊維の品
質、品位が著しく安定化する。(3) When the precursor is exchanged, the entanglement connection means can be used to continuously pass the flame-proofing / carbonization step even in the case of a precursor having a connection portion, so that the variation width of the process condition is small. Become. As a result, the quality and quality of the obtained carbon fiber are remarkably stabilized.
【００３３】（４）プレカーサが耐炎化炉外で糸切れし
た場合にも、直ちに本発明方法を施すことができるた
め、装置を停止することなく運転を継続することができ
る。(4) Even when the precursor breaks outside the flame-proof furnace, the method of the present invention can be performed immediately, so that the operation can be continued without stopping the apparatus.
【図１】この発明に適用し得る加圧流体交絡装置の一実
施例を示す概略斜視図である。FIG. 1 is a schematic perspective view showing an embodiment of a pressurized fluid entanglement device applicable to the present invention.
１，１´：被処理糸条 ２：絡合処理空間 ３：糸条挿入口 ４：加圧流体噴出口 1, 1 ': yarn to be processed 2: entangled processing space 3: yarn insertion port 4: pressurized fluid jet
Claims (3)
接続し、次に該繊維糸条の接続部に、ホウ酸および亜硫
酸ナトリウムから選ばれた少なくとも一種の酸化反応抑
制剤を付与し、しかる後焼成することを特徴とする炭素
繊維の製造方法。An end of carbonizable fiber yarn is entangled with each other, and boric acid and sulfurous acid are added to the connection portion of the fiber yarn.
A method for producing a carbon fiber, comprising applying at least one kind of an oxidation reaction inhibitor selected from sodium oxalate, followed by firing.
末端の絡合接続が、高圧流体処理による絡合接続である
炭素繊維の製造方法。2. The method for producing carbon fibers according to claim 1, wherein the entangled connection at the end of the fiber yarn that can be carbonized is an entangled connection by high-pressure fluid treatment.
ウ酸および亜硫酸ナトリウムから選ばれた少なくとも一
種の酸化反応抑制剤を混入した水溶液を用いて高圧水流
処理により絡合接続し、しかる後焼成することを特徴と
する炭素繊維の製造方法。3. superposed ends of carbonization possible yarn, ho
At least one selected from uric acid and sodium sulfite
What is claimed is: 1. A method for producing carbon fibers, comprising entangled and connected by high pressure water flow treatment using an aqueous solution mixed with various kinds of oxidation reaction inhibitors, followed by firing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13191190 | 1990-05-21 | ||
| JP2-131911 | 1990-05-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04214414A JPH04214414A (en) | 1992-08-05 |
| JP2590620B2 true JP2590620B2 (en) | 1997-03-12 |
Family
ID=15069065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3037564A Expired - Fee Related JP2590620B2 (en) | 1990-05-21 | 1991-03-04 | Carbon fiber production method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2590620B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020133092A (en) * | 2019-02-20 | 2020-08-31 | 帝人株式会社 | Method for manufacturing flameproof fiber bundle, method for manufacturing carbon fiber bundle and joining apparatus |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3833654B2 (en) | 2001-06-12 | 2006-10-18 | 三菱レイヨン株式会社 | Carbon fiber manufacturing apparatus and manufacturing method thereof |
| CN105970358B (en) * | 2016-03-10 | 2018-07-31 | 江苏恒神股份有限公司 | Carbon fibre precursor high steam drafting machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5450624A (en) * | 1977-09-29 | 1979-04-20 | Showa Denko Kk | Production of carbon fiber |
| US4603041A (en) * | 1984-07-19 | 1986-07-29 | E. I. Du Pont De Nemours And Company | Cyclization of acrylic fiber |
| JPS6412850A (en) * | 1987-07-03 | 1989-01-17 | Amada Co Ltd | Permanent magnet type linear pulse motor |
-
1991
- 1991-03-04 JP JP3037564A patent/JP2590620B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020133092A (en) * | 2019-02-20 | 2020-08-31 | 帝人株式会社 | Method for manufacturing flameproof fiber bundle, method for manufacturing carbon fiber bundle and joining apparatus |
| JP7408406B2 (en) | 2019-02-20 | 2024-01-05 | 帝人株式会社 | Method for manufacturing flame-resistant fiber bundle, method for manufacturing carbon fiber bundle, and connection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04214414A (en) | 1992-08-05 |
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