JPH08158150A - In-bath drawing treatment of acrylic fiber - Google Patents

In-bath drawing treatment of acrylic fiber

Info

Publication number
JPH08158150A
JPH08158150A JP29122594A JP29122594A JPH08158150A JP H08158150 A JPH08158150 A JP H08158150A JP 29122594 A JP29122594 A JP 29122594A JP 29122594 A JP29122594 A JP 29122594A JP H08158150 A JPH08158150 A JP H08158150A
Authority
JP
Japan
Prior art keywords
bath
fiber bundle
temperature
showering
fiber
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.)
Pending
Application number
JP29122594A
Other languages
Japanese (ja)
Inventor
Yoshikazu Tokuoka
義和 徳岡
Takahiro Ogushi
隆浩 大串
Yasutaka Yoshimura
恭隆 吉村
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.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP29122594A priority Critical patent/JPH08158150A/en
Publication of JPH08158150A publication Critical patent/JPH08158150A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To raise the drawability of an acrylic fiber bundle and improve the productivity of acrylic fiber by preheating the fiber bundle through showering of a bath liquor prior to introducing into the drawing bath. CONSTITUTION: When an acrylic fiber bundle is to be drawn at two stages or more in a bath, at the 2nd stage or thereafter, a before the acrylic fiber bundle 1 is introduced into a drawing bath 4 and immersed in the bath liquor at t deg.C, a part of the bath liquor is fed via a circulating pump 5 to a showering liquid temperature regulator 7 to control the showering liquid temperature Ts deg.C so as to satisfy the relationship: t<=Ts <=(t+10) followed by showering the bath liquor 1 from a showering device 10 to preheat the fiber bundle 1 so that its temperature Tf deg.C satisfies the relationship: (t-30)<=Tf <=t to effect the improvement of the drawability of the fiber bundle 1.

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、アクリル系繊維を浴中
で延伸処理する方法に関し、より詳しくは、アクリル系
繊維の延伸性を向上させ得る浴中延伸処理方法に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drawing an acrylic fiber in a bath, and more particularly to a method for drawing a fiber in a bath which can improve the drawability of the acrylic fiber.

【0002】[0002]

【従来の技術】アクリル系繊維の製造において、生産効
率を高め、製造原価を低減することは極めて重要な問題
である。かかる問題に対して、アクリル系繊維の製造に
際して、ホール数を多くした大型紡糸口金を使用した
り、口金の錘数の増加、さらには、糸条走行速度を大き
くするなどの手段が採用されることが多い。
2. Description of the Related Art In the production of acrylic fibers, increasing production efficiency and reducing production cost are extremely important problems. To solve this problem, a large spinneret with a large number of holes is used in the production of acrylic fibers, the number of spindles in the spinneret is increased, and the yarn running speed is increased. Often.

【0003】その中で糸条走行速度を大きくする方法
は、設備の大幅な変更を伴わず工業的に実施できる利点
があるが、その反面、同一設備で糸条走行速度を大きく
すると、延伸工程で延伸処理される時間が短くなるため
に、速度の上昇幅が相当に大きい場合には、繊維束が均
一に延伸される温度になる前に延伸されることになるの
で延伸性が低下する。これにより、単繊維切れやロール
への巻付きが起こり、生産性や製品の品質品位が低下す
る問題があった。特に、炭素繊維製造用のアクリル系繊
維を製造する場合においては、得られる炭素繊維の品質
に影響し、例えば得られる炭素繊維の強度低下を引き起
こす。
Among them, the method of increasing the yarn running speed has an advantage that it can be industrially carried out without drastically changing the equipment, but on the other hand, if the yarn running speed is increased with the same equipment, the drawing process is performed. In the case where the speed increase width is considerably large, the stretching time is shortened, so that the fiber bundle is stretched before the temperature reaches a temperature at which the fiber bundle is uniformly stretched. As a result, there is a problem that single fiber breakage or winding around a roll occurs, which lowers productivity and product quality. In particular, in the case of producing an acrylic fiber for producing carbon fiber, the quality of the obtained carbon fiber is affected, and the strength of the obtained carbon fiber is reduced.

【0004】このような問題を解決するには、糸条走行
速度の上昇に伴い延伸処理時間が短くなるのを実質的に
補う必要がある。設備上、延伸浴の長さを長くしたり、
延伸段数を増加することで解決することも可能である
が、かかる場合には、設備拡張のためのスペースおよび
多額の費用を要し、工業的には不利である。
In order to solve such a problem, it is necessary to substantially compensate for the shortening of the drawing treatment time as the yarn running speed increases. Due to the equipment, lengthening the drawing bath,
It is possible to solve the problem by increasing the number of drawing stages, but in such a case, a space for expanding the equipment and a large amount of cost are required, which is industrially disadvantageous.

【0005】特開昭64−85306号公報には、浴中
延伸処理に関して、紡糸口金から吐出された繊維束を浴
中延伸する前に空気中または浴中で該浴液よりも5〜3
0℃低い熱水を繊維束に噴射することにより糸条をほぐ
して繊維間の膠着を防止することが提案されている。し
かしながら、この方法により繊維束をある程度予熱して
実質的な延伸処理時間の短縮化を補うことはできるが、
延伸性を十分に高める温度まで予熱するには不十分であ
る。また、繊維束に噴射する熱水の量を増やして予熱を
大きくしようとすれば、相当量の熱水を噴射しなければ
ならず、その場合、繊維束のばらけが大きくなって、多
糸条で走行する隣の繊維束との混繊を起こし、単繊維切
れして逆に延伸性が低下する問題が生じるという欠点が
ある。
Japanese Unexamined Patent Publication (Kokai) No. 64-85306 discloses a drawing process in a bath which is performed in the air or in the bath before the drawing of the fiber bundle discharged from the spinneret in the bath by 5 to 3 times more than the bath liquid.
It has been proposed to spray hot water at 0 ° C. lower on the fiber bundles to loosen the yarns and prevent the fibers from sticking together. However, although it is possible to preheat the fiber bundle to some extent by this method to compensate for the substantial shortening of the drawing treatment time,
It is insufficient to preheat to a temperature at which the stretchability is sufficiently increased. Further, if it is attempted to increase the preheating by increasing the amount of hot water sprayed on the fiber bundle, a considerable amount of hot water must be sprayed, in which case the fiber bundle will become loose and the multiple yarn However, there is a problem in that the fibers are mixed with the adjacent fiber bundle that runs in, causing breakage of the single fibers and conversely a decrease in drawability.

【0006】特開昭62−90310号公報には、アク
リル系繊維トウを延伸浴中で延伸処理した後引取るに際
して、引き取りロールとトウとの接触面に該延伸浴液を
シャワーリングして、トウの引取りロールへの巻付きを
防止する方法の提案がなされている。しかしながら、こ
の方法では浴中延伸処理後にシャワーリングを行うため
に、アクリル系繊維トウの延伸性には影響を及ぼさず、
製造速度の上昇に伴うアクリル系繊維トウの延伸性の低
下という問題を解決することはできない。
In JP-A-62-90310, when the acrylic fiber tow is drawn in a drawing bath and then taken off, the drawing bath solution is showered on the contact surface between the take-up roll and the tow. A method of preventing the tow from being wound around the take-up roll has been proposed. However, in this method, since showering is performed after the drawing treatment in the bath, it does not affect the drawability of the acrylic fiber tow,
It is not possible to solve the problem that the stretchability of the acrylic fiber tow decreases as the production speed increases.

【0007】本発明者らは、アクリル系繊維の延伸工程
における浴中延伸処理方法に関して、製造速度を大きく
しても設備を改造することなく、また、生産性や製品の
品質品位の低下を起こすことなく延伸し得る方法につい
て鋭意検討した結果、本発明に到達した。
The inventors of the present invention, regarding the in-bath drawing treatment method in the drawing step of the acrylic fiber, do not modify the equipment even if the production speed is increased, and cause a decrease in productivity and product quality. The present invention has been achieved as a result of earnestly investigating a method capable of stretching without any treatment.

【0008】[0008]

【発明が解決しようとする課題】本発明の目的は、生産
性の向上のための紡糸速度の上昇に際して、既存の設備
を転用しつつ、かつ前記したような問題を生じることな
く、繊維束の延伸性を向上せしめ得るアクリル系繊維の
浴中延伸処理方法を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to use a fiber bundle while increasing the spinning speed in order to improve productivity, while diverting existing equipment and without causing the above-mentioned problems. It is an object of the present invention to provide a method for drawing an acrylic fiber in a bath, which can improve drawability.

【0009】[0009]

【課題を解決するための手段】本発明は、上記課題を達
成するため、次の構成を有する。すなわち、アクリル系
繊維を浴中で延伸段数を2段以上として延伸処理するに
際し、2段目以降の延伸処理において、延伸浴に入る前
の繊維束に浴液をシャワーリングし、延伸浴に入る前の
繊維束の温度Tf (℃)と該延伸浴の浴液温度t(℃)
が次の式を満足するように、繊維束を予熱することを特
徴とするアクリル系繊維の浴中延伸処理方法である。
The present invention has the following constitution in order to achieve the above object. That is, when the acrylic fiber is stretched in the bath with two or more stretching stages, in the second and subsequent stretching treatments, the bath solution is showered on the fiber bundle before entering the stretching bath to enter the stretching bath. The temperature T f (° C.) of the previous fiber bundle and the bath liquid temperature t (° C.) of the drawing bath
Is to preheat the fiber bundle so as to satisfy the following equation.

【0010】t−30≦Tf ≦t 以下、本発明について詳細に説明する。T-30 ≦ T f ≦ t The present invention will be described in detail below.

【0011】本発明者らは、アクリル系繊維の延伸処理
において、延伸浴に入る糸条の温度と延伸性との関係を
詳細に検討した結果、2段目以降の延伸浴に入る前の糸
条が前段の延伸浴から出て、ロールを介して空気中を通
過して来る際に、繊維束の温度が空気中への放熱や浴液
が蒸発する時の潜熱のために延伸浴の温度よりかなり低
くなっていることを見出した。それにより、紡糸速度が
遅い場合には、前段の延伸浴中で十分に昇温される時間
を確保できるので問題が生じないが、紡糸速度を上昇し
た場合には、延伸処理時間が短くなるのでその分昇温が
不十分になり延伸性が低下するのである。そこで、延伸
浴中での昇温時間不足を補うべく、2段目以降の延伸浴
に入る前の繊維束に浴液をシャワーリングして繊維束を
予熱すれば、延伸性が向上して紡糸速度を大きくしても
問題なく延伸できることを見出したのである。
The inventors of the present invention have studied in detail the relationship between the temperature of the yarn in the drawing bath and the drawability in the drawing treatment of the acrylic fiber, and as a result, the yarn before entering the drawing bath after the second stage. When the strip comes out of the drawing bath in the previous stage and passes through the air through the roll, the temperature of the fiber bundle causes the heat of the fiber bundle to radiate into the air and the latent heat when the bath liquid evaporates. I found that it was much lower. As a result, when the spinning speed is slow, there is no problem because a sufficient heating time can be secured in the drawing bath in the previous stage, but when the spinning speed is increased, the drawing treatment time becomes short. Therefore, the temperature rise becomes insufficient and the stretchability deteriorates. Therefore, in order to make up for the insufficient heating time in the drawing bath, if the bath solution is showered to the fiber bundle before entering the drawing bath after the second stage to preheat the fiber bundle, the drawability is improved. It was found that even if the speed was increased, the film could be stretched without any problem.

【0012】本発明は延伸段数が2段以上からなる延伸
装置において、2段目以降での延伸処理に適用するもの
である。1段目の延伸位置では糸条走行速度がさほど早
くないので、最終の糸条走行速度を上昇しても延伸性へ
の影響がほとんどない。しかも1段目の延伸浴入りの繊
維束は、凝固出糸または凝固出後水洗処理された糸条で
あって実質的に未延伸の糸条であるために、過度の熱を
受けると繊維の単繊維間の膠着を起こし易く、かかる糸
条にシャワーリングすると浴液の熱に加えロールとの圧
着により単繊維間の膠着が生じ、延伸性がかえって低く
なる問題が生じる。
The present invention is applied to the stretching treatment in the second and subsequent stages in a stretching device having two or more stretching stages. Since the yarn running speed is not so high at the drawing position of the first stage, even if the final yarn running speed is increased, the drawability is hardly affected. Moreover, since the fiber bundle in the first-stage drawing bath is a coagulated yarn or a yarn that has been washed with water after coagulation and is a substantially unstretched yarn, the fiber bundle is not exposed to excessive heat. Sticking between single fibers is likely to occur, and when showering on such a yarn, sticking between single fibers occurs due to the heat of the bath liquid and pressure bonding with the roll, which causes a problem that the stretchability is rather lowered.

【0013】図1は、本発明におけるアクリル系繊維の
浴中延伸処理方法の一実施態様を示す概略側面図であ
る。図1に示すように、アクリル系繊維束は、供給ロー
ル2,2’によって延伸浴4に導入、浸漬され、該供給
ロール2’と対をなし、回転速度を異にする引き取りロ
ール3によって引き取られ、その間に延伸される。
FIG. 1 is a schematic side view showing one embodiment of a method for drawing an acrylic fiber in a bath according to the present invention. As shown in FIG. 1, the acrylic fiber bundle is introduced into the drawing bath 4 by the supply rolls 2 and 2 ′ and immersed therein, and is paired with the supply roll 2 ′ and taken up by the take-up roll 3 having a different rotation speed. And stretched in the meantime.

【0014】本発明の特徴は、供給ロール2,2’によ
って延伸浴3に導入、浸漬される前の繊維束に浴液をシ
ャワーリングして繊維束を特定の温度範囲内に予熱する
ところにある。シャワーリングは、延伸浴4の浴液を循
環ポンプ5により、シャワーリング装置10からシャワ
ーすることにより行われ、シャワーリング液の温度は温
度調節装置7により、液量は流量調節装置8と流量計9
によって、延伸浴に入る前の繊維束が特定の温度範囲内
に入るように制御される。
The feature of the present invention is that the bath liquid is showered to the fiber bundle before being introduced and dipped in the drawing bath 3 by the supply rolls 2 and 2'to preheat the fiber bundle within a specific temperature range. is there. The showering is performed by showering the bath liquid of the stretching bath 4 from the showering device 10 by the circulation pump 5, the temperature of the showering liquid is controlled by the temperature control device 7, and the amount of the showering liquid is controlled by the flow control device 8 and the flow meter. 9
The fiber bundle before entering the drawing bath is controlled to fall within a specific temperature range.

【0015】延伸浴に入る前の繊維束の温度Tf (℃)
と該延伸浴の浴液温度t(℃)が次式を満足するように
繊維束が予熱されている必要がある。
Temperature of the fiber bundle before entering the drawing bath T f (° C.)
And the fiber bundle must be preheated so that the bath liquid temperature t (° C.) of the drawing bath satisfies the following equation.

【0016】t−30≦Tf ≦t より好ましくは、延伸浴に入る前の繊維束の温度と該延
伸浴の浴液温度が次式を満足するように繊維束が予熱さ
れているのが良い。
[0016] More preferably t-30 ≦ T f ≦ t , that the fiber bundle as the bath temperature of the temperature and the draw bath of the fiber bundle before entering the drawing bath to satisfy the following equation is preheated good.

【0017】t−25≦Tf ≦t−5 延伸浴に入る前の繊維束の温度が上記温度範囲より低い
場合には本発明の効果が現れず、繊維束の温度が上記温
度範囲より高い場合には繊維束とロールとの圧着により
単繊維間に膠着が生じ、しかも、延伸されない状態で延
伸浴温度より高温の浴液に曝されることにより繊維内部
のボイドが大きくなり構造が粗になるために延伸性が低
下する。
T-25 ≦ T f ≦ t-5 When the temperature of the fiber bundle before entering the drawing bath is lower than the above temperature range, the effect of the present invention is not exhibited and the temperature of the fiber bundle is higher than the above temperature range. In this case, the fiber bundles and rolls are pressed together to cause sticking between the single fibers, and moreover, when they are not stretched and exposed to a bath liquid at a temperature higher than the stretching bath temperature, voids inside the fibers become large and the structure becomes rough. Therefore, the stretchability decreases.

【0018】延伸浴に入る前の繊維束の温度を上記範囲
内とするためには、シャワーリングする浴液の温度Ts
(℃)として次式が満足するように設定することが好ま
しい。
In order to keep the temperature of the fiber bundle before entering the drawing bath within the above range, the temperature of the bath liquid for showering T s
It is preferable to set (° C.) so that the following expression is satisfied.

【0019】t≦Ts ≦t+10 より好ましくは、シャワーリングする浴液の温度として
次式が満足するように設定するのが良い。
T ≦ T s ≦ t + 10 More preferably, the temperature of the bath liquid for showering should be set so that the following equation is satisfied.

【0020】t≦Ts ≦t+5 シャワーリングする浴液の温度が上記温度範囲より低い
場合には繊維束の温度を前記特定の温度範囲に予熱する
ことが難しい場合があり、またシャワーリングの液量を
多くして温度範囲内に予熱しようとすると浴液の飛散に
よる作業環境の悪化や繊維束がばらけて隣の繊維束と混
繊し延伸性が低下する問題が生じる場合がある。また、
作業環境の面からはシャワーリングの液量は少ない方が
よい。シャワーリング液の温度が上記温度範囲より高い
場合にはシャワーリング液の液量が少なくてすむので、
浴液の飛散が小さいメリットはあるが、液温が高いため
に繊維束の一部分にロールとの圧着により単繊維間に膠
着が生じ、しかも繊維内部のボイドが大きくなって延伸
性が低下する場合がある。
T ≦ T s ≦ t + 5 If the temperature of the bath liquid for showering is lower than the above temperature range, it may be difficult to preheat the temperature of the fiber bundle to the above specific temperature range, and the showering liquid If the amount is increased and preheating is performed within the temperature range, the work environment may be deteriorated due to the scattering of the bath liquid, or the fiber bundles may be separated and mixed with the adjacent fiber bundles, resulting in a problem that the stretchability is deteriorated. Also,
From the standpoint of work environment, it is better that the shower ring has less liquid. If the temperature of the showering liquid is higher than the above temperature range, the amount of the showering liquid can be small,
Although there is a merit that the scattering of the bath liquid is small, when the liquid temperature is high, a part of the fiber bundle is stuck to the single fibers by pressure bonding with the roll, and further voids inside the fiber become large and the stretchability deteriorates. There is.

【0021】シャワーリングする延伸工程中の場所につ
いては、延伸浴入りの繊維束上であれば特に限定するも
のではなく、供給ロール、たとえば図1中の2あるいは
2’上の繊維束でも、または供給ロール間の繊維束でも
よいが、予熱の効率の面から供給ロール上の繊維束の方
が好ましい。
The location of the showering during the drawing step is not particularly limited as long as it is on the fiber bundle containing the drawing bath, and may be on the supply roll, for example, the fiber bundle on 2 or 2'in FIG. 1, or Although the fiber bundle between the supply rolls may be used, the fiber bundle on the supply roll is preferable from the viewpoint of preheating efficiency.

【0022】本発明の方法を適用するに最も好ましいア
クリル系繊維としては、特に品質,性能においてより厳
格な製造条件の制御が要求される、炭素繊維製造用原料
としてのアクリル系繊維が挙げられる。
The most preferable acrylic fiber to which the method of the present invention is applied is acrylic fiber as a raw material for carbon fiber production, which requires stricter control of production conditions particularly in terms of quality and performance.

【0023】[0023]

【実施例】以下、実施例により本発明をより詳細に説明
する。
The present invention will be described in more detail with reference to the following examples.

【0024】なお実施例中における特性値は次の方法に
より求めたものである。
The characteristic values in the examples are obtained by the following method.

【0025】(1)限界延伸倍率 浴中延伸処理において被処理繊維束の供給ロール速度
(A)を一定にしておき、引き取りロール速度を上げて
いった時に繊維束が切断する最高速度(B)を測定し、
下記式から求めた数値を限界延伸倍率とする。
(1) Limiting draw ratio In the drawing process in the bath, the feed roll speed (A) of the fiber bundle to be treated is kept constant and the maximum speed (B) at which the fiber bundle is cut when the take-up roll speed is increased. Is measured
The value obtained from the following formula is used as the limit draw ratio.

【0026】限界延伸倍率=A/B (2)延伸浴入り前の繊維束の温度 図1の供給ロール2’上の延伸浴に入る直前の繊維束に
接触式の表面温度計を押し当てて測定した。
Limiting draw ratio = A / B (2) Temperature of fiber bundle before entering the drawing bath A contact type surface thermometer is pressed against the fiber bundle on the supply roll 2'in FIG. 1 immediately before entering the drawing bath. It was measured.

【0027】(3)延伸2浴出糸の膠着評価 延伸2浴出糸をトータル倍率(延伸1浴倍率×延伸2浴
倍率)が4.5倍の条件で採取した。
(3) Sticking Evaluation of Stretched 2-Bath Delivered Thread The drawn 2-bath stretched yarn was sampled under the condition that the total ratio (stretching 1-bath ratio × stretching 2-bath ratio) was 4.5 times.

【0028】サンプルを片刃剃刀で約5mmに切断し、
ノイゲンSSの0.1重量%水溶液に分散させ、スター
ラーで60rpm ×1分間撹拌後黒色ろ紙でろ過し、実体
顕微鏡で4倍の倍率で観察して膠着している個数を数え
て次の基準により等級判定する。
The sample was cut into about 5 mm with a single-edged razor,
Disperse in a 0.1 wt% aqueous solution of Neugen SS, stir with a stirrer at 60 rpm for 1 minute, filter with black filter paper, and observe with a stereoscopic microscope at a magnification of 4 times to count the number of sticky substances according to the following criteria Determine the grade.

【0029】 膠着個数 等級 0〜 5個 : 1級 6〜10個 : 2級 11〜15個 : 3級 16〜20個 : 4級 21個以上 : 5級 (実施例1〜3)アクリルニトリル(以下ANと略称す
る)99.5モル%、イタコン酸0.5モル%からなる
AN共重合体を20重量%含むジメチルスルホキシド
(以下DMSOと略称する)溶液を紡糸原液として、孔
数3000ホールの口金を通して60℃に温調された5
5%DMSO水溶液中に紡出して凝固糸を得た。この凝
固糸を65℃の浴中で水洗した後、延伸1浴で75℃の
浴中で2.5倍の延伸処理を行い、延伸2浴への糸条供
給速度を40m/分とし、延伸2浴の延伸浴温度を85
℃として、図1に示すような延伸2浴装置で延伸して限
界延伸倍率を求めた。この際、シャワーリング液の温度
を85、95、98℃と変更して図1の供給ロール2’
上の繊維束に対してシャワーリングを行った。結果を表
1に示す。
Aggregation number Grade 0 to 5: 1st grade 6 to 10: 2nd grade 11 to 15: 3rd grade 16 to 20: 4th grade 21 or more: 5th grade (Examples 1 to 3) Acrylonitrile ( A dimethyl sulfoxide (hereinafter abbreviated as DMSO) solution containing 20% by weight of an AN copolymer composed of 99.5 mol% of AN) and 0.5 mol% of itaconic acid is used as a spinning stock solution and has a hole number of 3000 holes. Temperature controlled to 60 ° C through the base 5
A coagulated yarn was obtained by spinning in a 5% DMSO aqueous solution. This coagulated yarn was washed with water in a bath at 65 ° C., and then stretched 1 time in a bath at 75 ° C. by a factor of 2.5, and the yarn supply speed to the draw 2 bath was 40 m / min. The drawing bath temperature of 2 baths is 85
The temperature was set at 0 ° C and the limiting draw ratio was determined by drawing with a drawing 2 bath apparatus as shown in Fig. 1. At this time, the temperature of the showering liquid is changed to 85, 95 and 98 ° C. and the supply roll 2 ′ of FIG.
The upper fiber bundle was showered. The results are shown in Table 1.

【0030】(比較例1)実施例3において、シャワー
リング液の流量を増加させて限界延伸倍率を求めた。結
果を表1に示す。
Comparative Example 1 In Example 3, the limiting draw ratio was determined by increasing the flow rate of the showering liquid. The results are shown in Table 1.

【0031】(比較例2)シャワーリングを行なわなか
った以外は、実施例1と同様にして、限界延伸倍率を求
めた。結果を表1に示す。
Comparative Example 2 The limiting draw ratio was determined in the same manner as in Example 1 except that showering was not performed. The results are shown in Table 1.

【0032】(実施例4)延伸2浴の温度を95℃に変
更し、シャワーリング液の温度を95℃に変更した以外
は、実施例1と同様にして、限界延伸倍率を測定した。
結果を表1に示す。
(Example 4) The limiting draw ratio was measured in the same manner as in Example 1 except that the temperature of the stretching 2 bath was changed to 95 ° C and the temperature of the showering liquid was changed to 95 ° C.
The results are shown in Table 1.

【0033】(比較例3)シャワーリング液の温度を7
5℃に変更した以外は、実施例4と同様にして、限界延
伸倍率を測定した。結果を表1に示す。
(Comparative Example 3) The temperature of the showering liquid was set to 7
The limiting stretch ratio was measured in the same manner as in Example 4 except that the temperature was changed to 5 ° C. The results are shown in Table 1.

【0034】(比較例4)シャワーリングを行なわなか
った以外は、実施例4と同様にして、限界延伸倍率を求
めた。結果を表1に示す。
Comparative Example 4 The limiting draw ratio was determined in the same manner as in Example 4 except that showering was not performed. The results are shown in Table 1.

【0035】(実施例5、6)延伸2浴の糸条供給速度
を60m/分に変更し、シャワーリング液の温度を8
5、93℃と変更した以外は、実施例1と同様にして、
限界延伸倍率を測定した。結果を表1に示す。
(Examples 5 and 6) The yarn feeding rate of the drawing 2 bath was changed to 60 m / min, and the temperature of the showering liquid was changed to 8
5, in the same manner as in Example 1 except that the temperature was changed to 93 ° C.
The limit draw ratio was measured. The results are shown in Table 1.

【0036】(比較例5)シャワーリングを行なわなか
った以外は、実施例5と同様にして、限界延伸倍率を求
めた。結果を表1に示す。
Comparative Example 5 The limiting draw ratio was determined in the same manner as in Example 5 except that showering was not performed. The results are shown in Table 1.

【0037】(実施例7)延伸2浴の温度を95℃に変
更し、シャワーリング液の温度を95℃に変更した以外
は、実施例5と同様にして、限界延伸倍率を測定した。
結果を表1に示す。
(Example 7) The limiting draw ratio was measured in the same manner as in Example 5 except that the temperature of the stretching 2 bath was changed to 95 ° C and the temperature of the showering liquid was changed to 95 ° C.
The results are shown in Table 1.

【0038】(比較例6)実施例7においてシャワーリ
ング液の流量を減少させて限界延伸倍率を求めた。結果
を表1に示す。
(Comparative Example 6) In Example 7, the flow rate of the showering liquid was reduced to determine the limiting draw ratio. The results are shown in Table 1.

【0039】(比較例7)シャワーリングを行なわなか
った以外は、実施例7と同様にして、限界延伸倍率を求
めた。結果を表1に示す。
Comparative Example 7 The limiting draw ratio was determined in the same manner as in Example 7 except that showering was not performed. The results are shown in Table 1.

【0040】[0040]

【表1】 表1において、シャワーリング液温度欄、繊維束温度欄
の()内は、延伸2浴温度に対する温度差である。
[Table 1] In Table 1, the values in parentheses in the showering liquid temperature column and the fiber bundle temperature column are the temperature differences with respect to the drawing two bath temperature.

【0041】本発明によれば、延伸浴入り前の繊維束を
本発明の範囲内に予熱した場合には、速度をアップして
もトータル限界倍率はあまり低下せず、延伸性が良好で
あることが分かる。
According to the present invention, when the fiber bundle before entering the drawing bath is preheated within the range of the present invention, the total limit magnification does not decrease much even if the speed is increased, and the drawability is good. I understand.

【0042】[0042]

【発明の効果】本発明によれば、アクリル系繊維の浴中
延伸処理に際して、延伸性の向上により生産性向上のた
め紡糸速度をアップしても、延伸性低下を起こすことな
く安定して延伸処理することができる。したがって、多
額の設備投資を要することなく紡糸速度をアップでき、
生産性の向上による合成繊維の製造原価の低減が可能と
なり、その産業上の効果はきわめて大きい。
EFFECTS OF THE INVENTION According to the present invention, in the drawing treatment of acrylic fiber in a bath, even if the spinning speed is increased to improve the productivity by improving the drawability, the drawability is stably maintained without lowering the drawability. Can be processed. Therefore, the spinning speed can be increased without requiring a large capital investment,
It is possible to reduce the manufacturing cost of synthetic fiber by improving productivity, and its industrial effect is extremely large.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明におけるアクリル系繊維の浴中延伸処理
の一実施態様を示すモデル図である。
FIG. 1 is a model diagram showing one embodiment of a drawing treatment of an acrylic fiber in a bath according to the present invention.

【符号の説明】[Explanation of symbols]

1:繊維束 2:供給ロール 3:引き取りロール 4:延伸浴 5:循環ポンプ 6:延伸浴液温度調節装置 7:シャワーリング液温度調節装置 8:流量調節装置 9:流量計 10:シャワーリング装置 1: Fiber bundle 2: Supply roll 3: Take-up roll 4: Stretching bath 5: Circulating pump 6: Stretching bath liquid temperature control device 7: Shower ring liquid temperature control device 8: Flow rate control device 9: Flow meter 10: Shower ring device

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】アクリル系繊維を浴中で延伸段数を2段以
上として延伸処理するに際し、2段目以降の延伸処理に
おいて、延伸浴に入る前の繊維束に浴液をシャワーリン
グし、延伸浴に入る前の繊維束の温度Tf (℃)と該延
伸浴の浴液温度t(℃)が次の式を満足するように、繊
維束を予熱することを特徴とするアクリル系繊維の浴中
延伸処理方法。 t−30≦Tf ≦t
1. When the acrylic fiber is stretched in a bath with two or more stretching stages, the fiber bundle before entering the stretching bath is showered with the bath liquid in the stretching process after the second stage. The fiber bundle is preheated so that the temperature T f (° C.) of the fiber bundle before entering the bath and the bath liquid temperature t (° C.) of the drawing bath satisfy the following equation: Method of stretching treatment in bath. t-30 ≦ T f ≦ t
【請求項2】シャワーリングする浴液の温度Ts (℃)
が次の式を満足することを特徴とする請求項1に記載の
アクリル系繊維の浴中延伸処理方法。 t≦Ts ≦t+10
2. The temperature T s (° C.) of the bath liquid for showering
Satisfies the following formula: The method for drawing an acrylic fiber in a bath according to claim 1. t ≦ T s ≦ t + 10
JP29122594A 1994-11-25 1994-11-25 In-bath drawing treatment of acrylic fiber Pending JPH08158150A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29122594A JPH08158150A (en) 1994-11-25 1994-11-25 In-bath drawing treatment of acrylic fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29122594A JPH08158150A (en) 1994-11-25 1994-11-25 In-bath drawing treatment of acrylic fiber

Publications (1)

Publication Number Publication Date
JPH08158150A true JPH08158150A (en) 1996-06-18

Family

ID=17766099

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29122594A Pending JPH08158150A (en) 1994-11-25 1994-11-25 In-bath drawing treatment of acrylic fiber

Country Status (1)

Country Link
JP (1) JPH08158150A (en)

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