JPH05140815A - Method for drawing acrylic yarn in bath - Google Patents
Method for drawing acrylic yarn in bathInfo
- Publication number
- JPH05140815A JPH05140815A JP30778791A JP30778791A JPH05140815A JP H05140815 A JPH05140815 A JP H05140815A JP 30778791 A JP30778791 A JP 30778791A JP 30778791 A JP30778791 A JP 30778791A JP H05140815 A JPH05140815 A JP H05140815A
- Authority
- JP
- Japan
- Prior art keywords
- yarn
- bath
- give
- acrylonitrile
- drawn
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はアクリル系糸条の浴中延
伸方法、さらに詳しくは、高い生産性で延伸することが
可能なアクリル系糸条の浴中延伸方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drawing an acrylic yarn in a bath, and more particularly to a method for drawing an acrylic yarn in a bath which can be drawn with high productivity.
【０００２】[0002]
【従来の技術】従来より、性能の優れた炭素繊維を得る
ために、原糸（プリカーサ）であるポリアクリロニトリ
ル系繊維に関する多くの改善技術が開示されている。炭
素繊維は、その前駆体であるポリアクリロニトリル系繊
維を紡糸する製糸工程、２００〜４００℃の空気雰囲気
中で該繊維を加熱焼成して酸化繊維に転換する耐炎化工
程、窒素・ヘリウム・アルゴン等の不活性雰囲気中でさ
らに３００〜２５００℃に加熱して炭化する炭化工程
（耐炎化工程と炭化工程を合わせて焼成工程と呼ぶ）を
経ることで得られ、複合材料用強化繊維として航空・宇
宙用途やスポーツ用途、一般産業用途などに幅広く利用
されている。2. Description of the Related Art Heretofore, in order to obtain carbon fibers having excellent performance, many improvements have been disclosed for polyacrylonitrile fiber which is a raw yarn (precursor). Carbon fiber is a spinning process of spinning a polyacrylonitrile-based fiber which is a precursor thereof, a flame-proofing process of heating the fiber in an air atmosphere of 200 to 400 ° C. to convert it into an oxidized fiber, nitrogen, helium, argon, etc. Obtained by going through a carbonization process (heating treatment process and carbonization process are collectively called a firing process) of further heating and carbonizing at 300 to 2500 ° C. in an inert atmosphere of aerospace. Widely used for applications, sports, general industrial applications, etc.
【０００３】これら炭素繊維の用途の中で、一般産業分
野への用途拡大の要求に応えるためには、製造原価を軽
減して、廉価な炭素繊維を提供することが最も重要であ
る。製造原価を低減させるため、設備生産性の向上すな
わち単位設備当たりの生産量を増大させることを狙っ
て、処理する糸条を太く（太糸条化）するとともに、処
理する糸条が延伸装置において占有する幅を狭く（高密
度化）すると、次のような問題点が生じるのであった。Among these uses of carbon fiber, it is most important to reduce the manufacturing cost and provide a low-priced carbon fiber in order to meet the demand for expanding the use to general industrial fields. To reduce the manufacturing cost, the yarn to be processed is thickened (thickened) in order to improve the productivity of the equipment, that is, to increase the production amount per unit equipment. If the occupied width is narrowed (increased in density), the following problems occur.
【０００４】糸条単位を太糸条化あるいは高密度化する
と、製糸工程の浴中延伸工程において、糸条内部への溶
液浸透性が悪くなり、そして昇温の際には各単繊維に熱
が伝わりにくくなる。そのため、単糸間接着の発生、延
伸性の低下、毛羽や断糸あるいは水洗不足といった問題
が発生し、工程通過性が低下する。また、次の焼成工程
においても断糸や毛羽の発生が起こるようになり、工程
通過性が低下するとともに、得られる炭素繊維の物性も
低下する。When the yarn unit is thickened or densified, the solution permeability into the yarn becomes poor in the drawing process in the bath during the yarn making process, and the individual filaments are heated when the temperature rises. Is difficult to reach. Therefore, problems such as occurrence of adhesion between single yarns, deterioration of drawability, fluff, yarn breakage, or insufficient washing with water occur, and process passability decreases. Also, in the subsequent firing step, yarn breakage and fluffing will occur, and the process passability will decrease, and the physical properties of the resulting carbon fiber will also decrease.
【０００５】浴中延伸工程での熱水延伸を安定に行う手
段として、特開昭５０−１５４５３１号公報で多段延伸
法が提案されている。しかしながら、太糸条、高密度の
糸条の延伸に採用しても、糸条内部への溶液浸透性は悪
く、単糸間接着の発生は抑制できず工程通過性が低下
し、また得られる繊維物性も十分でなく、満足な延伸処
理を行なうことはできなかった。As a means for stably performing hot water drawing in the drawing step in a bath, Japanese Patent Application Laid-Open No. 50-154531 proposes a multi-step drawing method. However, even if it is adopted for the drawing of thick yarns and high-density yarns, the solution permeability into the yarns is poor, the occurrence of adhesion between single yarns cannot be suppressed, and the process passability is reduced. The physical properties of the fiber were not sufficient, and a satisfactory stretching treatment could not be performed.
【０００６】また、特開昭６４−８５３０６号公報に
は、延伸のために張力が高くなることで互いに接触状態
にある繊維束を、方向転換ガイドから浴液を噴出させる
ことによりほぐすことで、単糸間接着を防止する技術が
提案されている。しかしながら、太糸条の場合には、方
向転換ガイドにかかる糸条の張力が大きくなり、糸束内
部の単糸が相互に拘束されてしまう。そのため、浴液が
糸条の内部に浸透しにくく、単糸間接着を防止すること
ができない、また十分な延伸ができず物性の良好な繊維
を得ることができなかった。Further, in Japanese Patent Laid-Open No. 64-85306, fiber bundles that are in contact with each other due to increased tension due to stretching are loosened by ejecting a bath liquid from a direction changing guide. Techniques for preventing adhesion between single yarns have been proposed. However, in the case of a thick yarn, the tension of the yarn applied to the direction change guide increases, and the single yarns inside the yarn bundle are mutually restrained. For this reason, the bath liquid is difficult to penetrate into the yarn, the adhesion between the single yarns cannot be prevented, and the fibers having good physical properties cannot be obtained due to insufficient stretching.
【０００７】[0007]
【発明が解決しようとする課題】本発明の目的は、太糸
条、高密度の糸条を浴中延伸する工程において、前記し
たような問題点を解消できるアクリル系糸条の浴中延伸
方法を提供することにある。DISCLOSURE OF THE INVENTION An object of the present invention is to provide a method for drawing an acrylic yarn in a bath, which can solve the above problems in a process of drawing a thick yarn or a high density yarn in a bath. To provide.
【０００８】[0008]
【課題を解決するための手段】前記した本発明の目的
は、主としてアクリロニトリルからなるアクリル系重合
体の溶液を紡糸後、下記に示す糸条密度指数Ｍが２００
０以上の糸条を浴中で延伸する浴中延伸において、周波
数１Ｈｚ以上１０００Ｈｚ以下、かつ振幅０．１ｍｍ以
上５０ｍｍ以下で該糸条を振動させることを特徴とする
アクリル系糸条の浴中延伸方法 Ｍ＝（浴中延伸に供される１糸条当りの実質トータルデ
ニール［ｄ］）／（１糸条当り糸幅［ｍｍ］） によって達成することができる。The above-mentioned object of the present invention is to spin a solution of an acrylic polymer mainly consisting of acrylonitrile, and then, after spinning, obtain a yarn density index M of 200.
In the in-bath drawing in which 0 or more yarns are drawn in the bath, the yarn is vibrated at a frequency of 1 Hz or more and 1000 Hz or less and an amplitude of 0.1 mm or more and 50 mm or less, and the acrylic yarn is drawn in the bath. Method M = (substantial total denier [d] per yarn to be subjected to drawing in the bath) / (yarn width per yarn [mm]).
【０００９】以下、詳細に本発明を説明する。本発明に
使用するアクリル系重合体は、主としてアクリロニトリ
ルからなる重合体であって、具体的にはアクリロニトリ
ル９０重量％以上からなる重合体であり、１０重量％以
内で他のコモノマーと共重合されていてもよい。コモノ
マーとしてはアクリル酸、メタアクリル酸、イタコン酸
等、及びそれらのメチルエステル、エチルエステル、プ
ロピルエステル、ブチルエステル等のアルキルエステ
ル、アルカリ金属塩、アンモニウム塩、あるいはアリル
スルホン酸、メタリルスルホン酸、スチレンスルホン酸
等及びそれらのアルカリ金属塩、などをあげることがで
きるが、特に限定されるものではない。コモノマーの量
が１０重量％を越えると、最終的に得られる炭素繊維の
物性が低下するので好ましくない。アクリル系重合体は
通常の乳化重合、塊状重合、溶液重合等の重合法を用い
て重合される。The present invention will be described in detail below. The acrylic polymer used in the present invention is a polymer mainly composed of acrylonitrile, specifically, a polymer composed of 90% by weight or more of acrylonitrile, and is copolymerized with another comonomer within 10% by weight. May be. As comonomers, acrylic acid, methacrylic acid, itaconic acid, and the like, and their alkyl esters such as methyl ester, ethyl ester, propyl ester, butyl ester, alkali metal salts, ammonium salts, or allyl sulfonic acid, methallyl sulfonic acid, Examples thereof include styrene sulfonic acid and the like and alkali metal salts thereof, but are not particularly limited. When the amount of the comonomer exceeds 10% by weight, the physical properties of the finally obtained carbon fiber deteriorate, which is not preferable. The acrylic polymer is polymerized by a usual polymerization method such as emulsion polymerization, bulk polymerization and solution polymerization.
【００１０】該アクリル系重合体と、ジメチルアセトア
ミド、ジメチルスルホキシド、ジメチルホルムアミド、
硝酸、ロダンソーダ水溶液等とからなる重合体溶液を紡
糸原液として、通常の湿式紡糸法、乾湿式紡糸法によっ
て紡糸し、アクリル系繊維を得ることができる。The acrylic polymer, dimethylacetamide, dimethylsulfoxide, dimethylformamide,
An acrylic fiber can be obtained by spinning using a polymer solution composed of nitric acid, an aqueous solution of rhodanese, etc. as a spinning dope by a usual wet spinning method or a dry wet spinning method.
【００１１】設備生産性を向上させる目的から、下記の
式で定義される糸条密度指数Ｍが２０００ｄ／ｍｍ以
上、好ましくは３０００ｄ／ｍｍ以上である場合に本発
明が効果的に適用できる。また、該糸条を構成する単糸
の数が、４０００以上であることが好ましく、６０００
以上であれば生産性向上効果がさらに大きくなるのでよ
り好ましい。 Ｍ＝（浴中延伸に供される１糸条当りの実質トータルデ
ニール［ｄ］）／（１糸条当り糸幅［ｍｍ］） ここで１糸条当りの実質トータルデニールとは、溶液で
膨潤した状態の糸条のデニールではなく、アクリル系重
合体のみからなる糸条としてのデニールであって、糸条
を構成する単糸デニールに糸条を構成する単糸の数を乗
じた数である。また、１糸条当りの糸幅とは、浴中延伸
工程において延伸に供される該１糸条の占める糸幅のこ
とであり、浴中延伸におけるフィードローラー上におい
て１糸条が占める糸幅から求められる。For the purpose of improving equipment productivity, the present invention can be effectively applied when the yarn density index M defined by the following formula is 2000 d / mm or more, preferably 3000 d / mm or more. The number of single yarns constituting the yarn is preferably 4000 or more, and 6000
The above is more preferable because the effect of improving productivity is further increased. M = (substantial total denier per yarn used for drawing in the bath [d]) / (yarn width per yarn [mm]) Here, “substantial total denier per yarn” means swelling with a solution. It is not a denier of the yarn in the state of being a denier, but a denier as a yarn consisting only of an acrylic polymer, and is a number obtained by multiplying the single yarn denier constituting the yarn by the number of single yarns constituting the yarn. .. Further, the yarn width per yarn means the yarn width occupied by the one yarn provided for drawing in the drawing process in the bath, and the yarn width occupied by one yarn on the feed roller during drawing in the bath. Required from.
【００１２】糸条密度指数Ｍが２０００未満の場合に
は、本発明を用いなくても前記したような浴中延伸工程
での単糸間接着はさほど顕著ではないが、設備生産性を
向上させることができないので好ましくない。When the yarn density index M is less than 2000, the adhesion between single yarns in the drawing process in the bath as described above is not so remarkable without using the present invention, but the equipment productivity is improved. It is not possible because it cannot be done.
【００１３】なお、複数の浴槽を用いて浴中延伸する場
合には、最初の延伸浴槽に供される１糸条当りの実質ト
ータルデニールとフィードローラー上において１糸条が
占める糸幅から求められる糸条密度指数Ｍが２０００以
上であればよい。In the case of drawing in a plurality of baths in the bath, it is determined from the substantial total denier per yarn provided in the first drawing bath and the yarn width occupied by one yarn on the feed roller. The yarn density index M may be 2000 or more.
【００１４】本発明で最も特徴的な点は、浴中で糸条を
延伸する際において、特定の条件で該糸条を浴中で振動
させることにある。糸条に強制的に振動を与える方法と
しては特に限定されないが、例えば往復運動をしている
ガイドバーを糸条の走行方向に直角に接触させる方法が
一例として挙げられる。往復運動をするガイドバーと
は、例えば電磁式あるいはエアー式の加振器にガイドバ
ーを接続することによって構成されているものである。
この場合、該ガイドバーは浴液中で糸条に直接接触する
ので、材質は腐蝕しにくく、かつ処理糸条との摩耗に耐
えるステンレス材などが好ましい。また、処理糸条との
接触面は、処理糸条表面のキズ防止の点から、表面最大
粗度が７μｍ以下、より好ましくは４μｍ以下、さらに
好ましくは１μｍ以下の、鏡面または梨地仕上げである
のが好ましい。The most characteristic feature of the present invention is that when the yarn is drawn in the bath, the yarn is vibrated in the bath under specific conditions. The method of forcibly applying vibration to the yarn is not particularly limited, but for example, a method of bringing a reciprocating guide bar into contact with the yarn at a right angle may be mentioned as an example. The reciprocating guide bar is constituted by connecting the guide bar to an electromagnetic or air type vibrator, for example.
In this case, since the guide bar comes into direct contact with the yarn in the bath solution, the material is preferably not corroded, and is preferably a stainless material or the like that is resistant to abrasion with the treated yarn. Further, the contact surface with the treated yarn has a mirror-finished or satin finish with a maximum surface roughness of 7 μm or less, more preferably 4 μm or less, and further preferably 1 μm or less from the viewpoint of preventing scratches on the surface of the treated yarn. Is preferred.
【００１５】図１は、振動を与える方法としてガイドバ
ーを採用した場合の本発明の一実施例に係る概略図であ
る。被処理糸条３は、フィードローラー群４、４′を介
して熱水延伸浴１中に導かれ、ドローローラー５′とフ
ィードローラー４′との速度差により延伸される。浴液
２中にはガイドバー６があり、加振源である加振器７に
よって加振される。そして、このガイドバー６が走行糸
条３と直角に接触し、浴液中で糸条を振動させるのであ
る。FIG. 1 is a schematic diagram according to an embodiment of the present invention in which a guide bar is adopted as a method of applying vibration. The yarn 3 to be treated is introduced into the hot water drawing bath 1 through the feed roller groups 4 and 4 ', and drawn by the speed difference between the draw roller 5'and the feed roller 4'. The bath liquid 2 has a guide bar 6 and is vibrated by a vibrating device 7 which is a vibrating source. Then, the guide bar 6 contacts the traveling yarn 3 at a right angle, and vibrates the yarn in the bath liquid.
【００１６】糸条は、フィードローラーの前、浴中、ド
ローローラー後、浴間などの位置に設けられた糸道ガイ
ドを用いて糸幅が規制されている。また、延伸工程の前
に行なわれる水洗工程における水洗浴中、浴間等の位置
に、糸道ガイドを設けることによっても糸幅を規制する
ことができる。The yarn width is regulated using a yarn guide provided at positions such as before the feed roller, during the bath, after the draw roller, and between the baths. The yarn width can also be regulated by providing a yarn guide at a position such as between baths during a washing bath in a washing process performed before the drawing process.
【００１７】また、複数の浴からなる浴中延伸工程にお
いて、各浴中の糸幅が広がる場合には、浴中に例えば図
２に示したような棒状の糸道ガイド８を設けることで、
糸幅を規制することができ、必要に応じて全浴中に糸道
ガイドを設けることで糸幅を規制することができる。When the yarn width in each bath is widened in the in-bath drawing process comprising a plurality of baths, a rod-shaped yarn path guide 8 as shown in FIG. 2, for example, is provided in the bath.
The yarn width can be regulated, and the yarn width can be regulated by providing a yarn path guide in the whole bath, if necessary.
【００１８】糸条密度指数Ｍは、図１の場合、フィード
ローラー４（または４′）に供される１糸条当りの実質
トータルデニールと、該１糸条がフィードローラー４
（または４′）上において占める糸幅から求められる。In the case of FIG. 1, the yarn density index M is a substantial total denier per yarn provided to the feed roller 4 (or 4 '), and the one yarn is the feed roller 4
(Or 4 ') is determined from the yarn width occupied on the top.
【００１９】糸条に与える振動の周波数は、１Ｈｚ以上
１０００Ｈｚ以下である。１Ｈｚ未満では、振動の作用
が不均一となり部分的に単糸間接着が発生するようにな
るので好ましくない。１０００Ｈｚを越えるようになる
と、振動速度に糸条振動が追従できなくなり、実質的に
糸条を振動させることができなくなる。また、装置の都
合上、振動の周波数が高くなるほど振幅を小さくせざる
を得ず、十分な振動を付与できなくなり、単糸間接着の
防止効果は小さくなるので好ましくない。振動の周波数
が５Ｈｚ以上５００Ｈｚ以下であることは、より好まし
い。The frequency of vibration applied to the yarn is 1 Hz or more and 1000 Hz or less. If it is less than 1 Hz, the action of vibration becomes non-uniform and adhesion between the single yarns occurs partially, which is not preferable. If the frequency exceeds 1000 Hz, the yarn vibration cannot follow the vibration speed, and the yarn cannot be substantially vibrated. Further, for the convenience of the device, the higher the frequency of vibration, the smaller the amplitude must be reduced, so that sufficient vibration cannot be applied, and the effect of preventing the adhesion between single yarns becomes small, which is not preferable. It is more preferable that the frequency of vibration is 5 Hz or more and 500 Hz or less.
【００２０】振動の全振幅は０．１ｍｍ以上５０ｍｍ以
下である。０．１ｍｍ未満では、糸条内部への浴液浸透
効果が小さくなり好ましくない。５０ｍｍを越えるよう
になると、糸条へのダメージが大きくなり糸切れを起こ
すようになって工程通過性が悪くなるし、また得られる
繊維の物性が低下するようになるので好ましくない。振
動の全振幅が１ｍｍ以上３０ｍｍ以下であると、より好
ましい。The total amplitude of vibration is 0.1 mm or more and 50 mm or less. If it is less than 0.1 mm, the effect of permeating the bath liquid into the yarn becomes small, which is not preferable. If it exceeds 50 mm, damage to the yarn becomes large, yarn breakage occurs, the process passability deteriorates, and the physical properties of the obtained fiber deteriorate, which is not preferable. More preferably, the total amplitude of vibration is 1 mm or more and 30 mm or less.
【００２１】図２は、本発明の他の実施例に係る概略図
である。図２に示したように、ラダー状のフリーローラ
ー９を浴中に設け、浴中で走行する糸条に接触せしめ、
糸条の走行に伴なって自由回転するフリーローラーのラ
ダー部分９′を周期的に糸条に衝突せしめることによっ
ても、糸条に振動を付与することができ、前記したガイ
ドバーと同様の効果を得ることができる。また、フリー
ローラーはラダー状でなくとも、多角形のものであって
も同様の効果を得ることができる。FIG. 2 is a schematic diagram according to another embodiment of the present invention. As shown in FIG. 2, a ladder-shaped free roller 9 is provided in the bath to bring it into contact with a yarn running in the bath,
Vibration can also be imparted to the yarn by periodically causing the ladder portion 9'of the free roller, which freely rotates as the yarn runs, to collide with the yarn, and the same effect as that of the guide bar described above can be obtained. Can be obtained. Further, the same effect can be obtained even if the free roller has a polygonal shape instead of the ladder shape.
【００２２】一方、本発明の浴中延伸において、延伸に
関与するローラーの数を少なくする方が、延伸張力によ
る延伸ローラへの圧着から起こり得る単糸間接着を回避
できるので、より好ましい。また、複数の浴で延伸処理
する場合、浴と浴の間のローラーは、一般的な駆動方式
よりも非駆動方式（フリー回転方式）を採用する方が、
延伸張力を均一化することができ、本発明の浴中延伸方
法の効果をより顕著に得ることができるので好ましい。On the other hand, in the drawing in the bath of the present invention, it is more preferable to reduce the number of rollers involved in the drawing, because it is possible to avoid the adhesion between the single yarns which can be caused by the pressure applied to the drawing roller due to the drawing tension. Further, in the case of stretching treatment with a plurality of baths, it is better to adopt a non-driving method (free rotation method) for the rollers between the baths than a general driving method.
It is preferable because the drawing tension can be made uniform and the effect of the drawing method in the bath of the present invention can be more remarkably obtained.
【００２３】[0023]
【実施例】以下、実施例により本発明をさらに具体的に
説明する。実施例中に示す浴中延伸糸の接着判定は、油
剤付与前の膨潤糸を約５ｍｍに切断しノイゲンＳＳの
０．１重量％水溶液に分散させ、スタラーで６０rpm で
１分間撹拌後、黒色ろ紙でろ過し、接着状態を５段階で
視感判定した。接着の全く認められない状態を１級、ほ
とんどの単糸が接着している状態を５級とした。４級以
上の場合、工程通過性が阻害されたり炭素繊維の物性を
低下させるなどの問題が生じる。The present invention will be described in more detail with reference to the following examples. To determine the adhesion of the drawn yarn in the bath shown in the examples, the swollen yarn before applying the oil agent is cut into about 5 mm, dispersed in a 0.1 wt% aqueous solution of Neugen SS, stirred with a stirrer at 60 rpm for 1 minute, and then filtered with black filter paper. The adhesive state was visually evaluated on a scale of 5 levels. The state in which no adhesion was observed was rated as class 1, and the state in which most of the single yarns were bonded was grade 5. When the grade is 4 or higher, problems such as impeding process passability and deteriorating the physical properties of carbon fiber occur.
【００２４】実施例１〜７、比較例１〜４ アクリロニトリル９９．５モル％、イタコン酸０．５モ
ル％からなるアクリル系重合体（固有粘度［η］＝１．
８０）を２０重量％含むジメチルスルホキシド（ＤＭＳ
Ｏ）溶液を紡糸原液として、ＤＭＳＯと水から構成され
る凝固浴中に、２４０００Ｈの口金から紡出し、単糸の
実質デニールが１２ｄで２４０００フィラメントの凝固
糸（実質トータルデニール：２８８０００ｄ）を得た。Examples 1 to 7, Comparative Examples 1 to 4 Acrylic polymer consisting of 99.5 mol% of acrylonitrile and 0.5 mol% of itaconic acid (intrinsic viscosity [η] = 1.
Dimethyl sulfoxide (DMS) containing 20% by weight of 80)
O) was used as a spinning stock solution and spun from a spinneret of 24000H into a coagulation bath composed of DMSO and water to obtain a coagulated yarn (substantial total denier: 288000d) of 24000 filaments with a substantial denier of 12d. ..
【００２５】この凝固糸を熱水中で水洗し、ついで、５
槽からなる浴中延伸工程に導き、９０℃の熱水中で合計
５倍の延伸を行なった。The coagulated yarn is washed with hot water and then 5
The drawing was conducted to a drawing process in a bath consisting of a tank, and drawing was carried out 5 times in total in hot water at 90 ° C.
【００２６】延伸の際、図１に示すようにエアー式の加
振器に接続したガイドバーを、延伸浴中で走行糸条に直
角に接触させながら表１に示した条件で振動させ、延伸
を行なった。この時、図示はしてないが、水洗工程の水
洗浴中に棒状の糸道ガイドを用いて、浴中延伸工程に入
る糸条の糸幅を規制することでフィードローラー４上の
糸幅を変え、浴中延伸工程での糸条密度指数Ｍを表１に
示したように変更した。 こうして延伸した糸条を膨潤
状態のまま採取し、前述の方法で単糸間接着を測定し、
その結果を表１に併記した。At the time of stretching, as shown in FIG. 1, a guide bar connected to an air type vibrator was vibrated under the conditions shown in Table 1 while contacting the running yarn at right angles in the stretching bath, and stretching. Was done. At this time, although not shown, a rod-shaped yarn path guide is used during the washing bath in the washing process to regulate the yarn width of the yarn entering the drawing process in the bath, thereby controlling the yarn width on the feed roller 4. Instead, the yarn density index M in the drawing process in the bath was changed as shown in Table 1. The yarn thus drawn is collected in a swollen state, the adhesion between single yarns is measured by the above-mentioned method,
The results are also shown in Table 1.
【００２７】[0027]
【表１】 [Table 1]
【００２８】本発明の範囲である実施例１〜７は、糸条
密度が高い状態でも単糸間接着を起こすことなく、安定
して均一に延伸処理を行なうことが可能となり、高い設
備生産性を有しながら、高品質のアクリル系糸条を得る
ことができた。それに対し、糸条を規制しない状態（比
較例１）では単糸間接着に問題はないが、設備生産性を
向上させることができないので、低原価で製造すること
ができず好ましくない。また、単に糸幅を狭め糸条密度
を高くするだけでは、単糸間接着が起こり、ほとんどの
単糸が接着していた（比較例２）。振動の周波数が本発
明の範囲を越えたところでは、本発明の効果が顕著では
なく、単糸間接着が起こるので好ましくない（比較例
３）。振動の振幅が本発明の範囲を越えたところでは、
糸切れが頻発し安定して延伸処理を行なうことができな
かった（比較例４）。In Examples 1 to 7, which are within the scope of the present invention, even when the yarn density is high, it is possible to stably and uniformly perform the stretching treatment without causing the inter-single yarn adhesion, and thus the high equipment productivity is achieved. It was possible to obtain a high-quality acrylic yarn while having On the other hand, in the state where the yarns are not regulated (Comparative Example 1), there is no problem in the bonding between single yarns, but since the equipment productivity cannot be improved, it is not possible to manufacture at low cost, which is not preferable. Further, by simply narrowing the yarn width and increasing the yarn density, single yarn-to-single yarn adhesion occurred, and most single yarns were bonded (Comparative Example 2). When the vibration frequency exceeds the range of the present invention, the effect of the present invention is not remarkable, and adhesion between single yarns occurs, which is not preferable (Comparative Example 3). Where the amplitude of vibration exceeds the scope of the present invention,
Frequent yarn breakage prevented stable stretching treatment (Comparative Example 4).
【００２９】[0029]
【発明の効果】本発明の方法は、太糸条、高密度の糸条
を浴中延伸処理するにおいて、浴中で処理糸条を一定条
件下で積極的に振動させることにより、糸束内部まで浴
液の浸透性を高め、また、加熱の際には各単糸の昇温を
均一にすることができる。そのため、単糸間接着が起こ
らず、斑のない良好な延伸処理を行なうことができる。
また、すでに接着を起こしている単糸どうしがあったと
しても、振動によりそれを分離する効果もあるため、優
れた延伸性、工程通過性を有する。さらに、本発明の方
法により、均一に安定して太糸条、高密度の糸条を浴中
延伸処理できることから、設備生産性を飛躍的に向上さ
せることができ、高品質・高性能の炭素繊維を低原価で
製造することが可能となり、その産業上の効果は極めて
大きい。INDUSTRIAL APPLICABILITY In the method of the present invention, when a thick yarn or a high-density yarn is drawn in a bath, the treated yarn is actively vibrated under a certain condition in the bath, so that the inside of the yarn bundle is Further, the permeability of the bath liquid can be increased, and the temperature of each single yarn can be made uniform during heating. Therefore, adhesion between single yarns does not occur, and good stretching treatment without spots can be performed.
Further, even if there are single yarns that have already adhered to each other, they have the effect of separating them by vibration, so that they have excellent drawability and process passability. Furthermore, since the method of the present invention can uniformly and stably perform the thick yarn and the high-density yarn in the bath, the productivity of the equipment can be dramatically improved, and high-quality and high-performance carbon can be obtained. Since fibers can be manufactured at low cost, the industrial effect is extremely large.
【図１】本発明の一実施例に係る概略図である。FIG. 1 is a schematic diagram according to an embodiment of the present invention.
【図２】本発明の他の実施例に係る概略図である。FIG. 2 is a schematic view according to another embodiment of the present invention.
１：延伸浴 ２：延伸浴液 ３：被処理糸条 ４，４′：フィードローラー群 ５，５′：ドローローラー群 ６：ガイドバー ７：加振器 ８：糸道ガイド ９：ラダー状のフリーローラー ９′（斜線部分）：ラダー部分 1: Drawing bath 2: Drawing bath liquid 3: Treated yarn 4,4 ': Feed roller group 5,5': Draw roller group 6: Guide bar 7: Vibrator 8: Thread guide 9: Ladder-like Free roller 9 '(hatched part): Ladder part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 奥田 章 愛媛県伊予郡松前町大字筒井1515 東レ株 式会社愛媛工場内 (72)発明者 猿山 秀夫 愛媛県伊予郡松前町大字筒井1515 東レ株 式会社愛媛工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Okuda 1515 Tsutsui, Matsumae-cho, Iyo-gun, Ehime Toray Co., Ltd. Ehime factory (72) Hideo Saruyama 1515 Tsutsui, Matsumae, Iyo-gun, Ehime Toray Co., Ltd. Ehime factory
Claims (2)
ル系重合体の溶液を紡糸後、下記に示す糸条密度指数Ｍ
が２０００以上の糸条を浴中で延伸する浴中延伸におい
て、周波数１Ｈｚ以上１０００Ｈｚ以下、かつ振幅０．
１ｍｍ以上５０ｍｍ以下で該糸条を振動させることを特
徴とするアクリル系糸条の浴中延伸方法。 Ｍ＝（浴中延伸に供される１糸条当りの実質トータルデ
ニール［ｄ］）／（１糸条当り糸幅［ｍｍ］）1. A yarn density index M shown below after spinning a solution of an acrylic polymer mainly composed of acrylonitrile.
No. 2000 or more, in the drawing in the bath, the frequency is 1 Hz or more and 1000 Hz or less, and the amplitude is 0.
A method for drawing an acrylic yarn in a bath, which comprises vibrating the yarn at a distance of 1 mm or more and 50 mm or less. M = (substantial total denier [d] per yarn used for drawing in the bath) / (thread width [mm] per yarn)
あることを特徴とする請求項１記載のアクリル系糸条の
浴中延伸方法。2. The method for drawing an acrylic yarn in a bath according to claim 1, wherein the number of single yarns constituting the yarn is 4000 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3307787A JP2875667B2 (en) | 1991-11-22 | 1991-11-22 | Method of stretching acrylic yarn for carbon fiber precursor in bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3307787A JP2875667B2 (en) | 1991-11-22 | 1991-11-22 | Method of stretching acrylic yarn for carbon fiber precursor in bath |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05140815A true JPH05140815A (en) | 1993-06-08 |
| JP2875667B2 JP2875667B2 (en) | 1999-03-31 |
Family
ID=17973250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3307787A Expired - Fee Related JP2875667B2 (en) | 1991-11-22 | 1991-11-22 | Method of stretching acrylic yarn for carbon fiber precursor in bath |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2875667B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998045515A1 (en) * | 1997-04-10 | 1998-10-15 | Toray Industries, Inc. | Method and apparatus for opening reinforced fiber bundle and method of manufacturing prepreg |
| WO2000077282A1 (en) * | 1999-06-15 | 2000-12-21 | Mitsubishi Rayon Co., Ltd. | Acrylic yarn as thick carbon fiber precursor and method for producing the same |
| EP1172191A4 (en) * | 2000-01-12 | 2002-09-18 | Toray Industries | Production device and method for opened fiber bundle and prepreg production method |
| JP2016017229A (en) * | 2014-07-04 | 2016-02-01 | 三菱レイヨン株式会社 | Method for producing carbon fiber precursor acrylic fiber bundle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6021907A (en) * | 1983-07-18 | 1985-02-04 | Toyobo Co Ltd | Manufacture of polyamide fiber having high strength and elastic modulus |
| JPS61215708A (en) * | 1985-03-19 | 1986-09-25 | Toray Ind Inc | Production of multifilament yarn |
| JPS62141111A (en) * | 1985-12-13 | 1987-06-24 | Toray Ind Inc | Dry jet-wet spinning |
| JPS6485306A (en) * | 1987-09-24 | 1989-03-30 | Nikkiso Co Ltd | Method for drawing with hot water and guide therefor |
-
1991
- 1991-11-22 JP JP3307787A patent/JP2875667B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6021907A (en) * | 1983-07-18 | 1985-02-04 | Toyobo Co Ltd | Manufacture of polyamide fiber having high strength and elastic modulus |
| JPS61215708A (en) * | 1985-03-19 | 1986-09-25 | Toray Ind Inc | Production of multifilament yarn |
| JPS62141111A (en) * | 1985-12-13 | 1987-06-24 | Toray Ind Inc | Dry jet-wet spinning |
| JPS6485306A (en) * | 1987-09-24 | 1989-03-30 | Nikkiso Co Ltd | Method for drawing with hot water and guide therefor |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998045515A1 (en) * | 1997-04-10 | 1998-10-15 | Toray Industries, Inc. | Method and apparatus for opening reinforced fiber bundle and method of manufacturing prepreg |
| US6094791A (en) * | 1997-04-10 | 2000-08-01 | Toray Industries, Inc. | Method and apparatus for opening reinforcing fiber bundle and method of manufacturing prepreg |
| WO2000077282A1 (en) * | 1999-06-15 | 2000-12-21 | Mitsubishi Rayon Co., Ltd. | Acrylic yarn as thick carbon fiber precursor and method for producing the same |
| US6245423B1 (en) | 1999-06-15 | 2001-06-12 | Mitsubishi Rayon Co., Ltd. | Thick acrylic fiber tows for carbon fiber production and methods of producing and using the same |
| GB2367031A (en) * | 1999-06-15 | 2002-03-27 | Mitsubishi Rayon Co | Acrylic yarn as thick carbon fiber precursor and method for producing the same |
| GB2367031B (en) * | 1999-06-15 | 2003-09-03 | Mitsubishi Rayon Co | Acrylic yarn as thick carbon fiber precursor and method for producing the same |
| EP1172191A4 (en) * | 2000-01-12 | 2002-09-18 | Toray Industries | Production device and method for opened fiber bundle and prepreg production method |
| US6743392B2 (en) | 2000-01-12 | 2004-06-01 | Toray Industries, Inc. | Production device and method for opened fiber bundle and prepreg production method |
| JP2016017229A (en) * | 2014-07-04 | 2016-02-01 | 三菱レイヨン株式会社 | Method for producing carbon fiber precursor acrylic fiber bundle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2875667B2 (en) | 1999-03-31 |
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