JP4856566B2 - Wet spinning apparatus and wet spinning method - Google Patents

Wet spinning apparatus and wet spinning method Download PDF

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JP4856566B2
JP4856566B2 JP2007042389A JP2007042389A JP4856566B2 JP 4856566 B2 JP4856566 B2 JP 4856566B2 JP 2007042389 A JP2007042389 A JP 2007042389A JP 2007042389 A JP2007042389 A JP 2007042389A JP 4856566 B2 JP4856566 B2 JP 4856566B2
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spinning
nozzle
liquid
yarn
tub
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JP2008202189A (en
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勝彦 池田
洋二 畑中
浩成 稲田
旭成 多田
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Mitsubishi Chemical Corp
Mitsubishi Rayon Co Ltd
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Description

本発明は、合成繊維を製造する湿式紡糸装置及び湿式紡糸方法に関する。   The present invention relates to a wet spinning apparatus and a wet spinning method for producing a synthetic fiber.

湿式紡糸装置は、有機系高分子重合体を溶媒に溶解して調製した紡糸原液をノズルから凝固液中に吐出して繊維状に固化させる装置である。この湿式紡糸装置により、アクリル繊維、ポリビニルアルコール繊維、その他アクリル系繊維などが製造される。
一般的にこの湿式紡糸装置は、凝固液が蓄えられる紡浴槽内の一端部にノズルが沈設され、該ノズルから吐出された紡糸原液が凝固液により凝固され凝固糸条とされ、他端部に沈設される引き上げロールを介して紡浴槽外に引き取られるよう構成されている。前記凝固液は、前記ノズルの背面側に配設された凝固液噴出し口から該紡浴槽内に吐出され、前記凝固糸条を凝固させつつ該凝固糸条の走行方向へと流されていき、他端部に配設された紡浴槽出口より凝固液回収部へと流出される。前記紡浴槽内で固化された繊維(凝固糸条)は、その後凝固液と分離して洗浄され、薬液処理、乾燥、熱処理等の後工程へと送られる。
前記凝固糸条を引き取り紡糸する速度は、一般に紡浴槽内に供給される凝固液の平均流速よりも速く設定され、そのため該凝固糸条の近傍にある凝固液は該凝固糸条に引き寄せられ随伴されて、紡糸速度に近い速さで引き取り方向へと流される(以下「随伴流」と表す)。そしてこれを補うために、前記凝固糸条から離れた紡浴槽内の底壁や側壁付近では凝固液が下流側から上流側へと逆流する現象が起こる。このように前記紡浴槽内では、随伴流と逆流との相反する方向の流れが同時に隣接して発生するために、両者が相互に干渉し合い凝固液は不規則に循環する流れとなり、局所的に渦や滞留が発生していた。そのため凝固不良により単糸切れした糸屑(ネスト)が紡浴槽内に浮遊し糸屑溜りが繊維に接触し製品の品質・性能の低下をもたらすという問題があった。又生産性を向上させるために紡糸速度を上げた場合にも、前記凝固液の乱流がより顕著に発生し、前記凝固糸条が槽の内で揺さぶられて繊度斑や単糸切れなどを引き起こし安定した生産を行う妨げとなっていた。
上記問題の解決策として、例えば特許文献1に記載された湿式紡糸装置が知られている。これは紡浴槽内の凝固液の乱流を抑制するために、凝固糸条と紡浴槽の長手方向の壁面との間に凝固液仕切り側板(整流板)を設置し凝固液流を制御するように構成されている。そして上記随伴流と逆流とが該凝固液仕切り側板により内槽とその両側の外槽とに夫々流れを分けられ、随伴流は内槽を下流側へ流され、逆流は外槽を上流側へ流されて前記ノズル近傍へと復流され新たに供給される凝固液と混合されるようになっている。
特開平9−67714号公報
The wet spinning apparatus is an apparatus for discharging a spinning solution prepared by dissolving an organic polymer in a solvent into a coagulating liquid from a nozzle and solidifying it into a fibrous form. With this wet spinning device, acrylic fiber, polyvinyl alcohol fiber, and other acrylic fibers are produced.
In general, in this wet spinning apparatus, a nozzle is set at one end in a spinning tub in which a coagulating liquid is stored, and the spinning raw liquid discharged from the nozzle is coagulated by the coagulating liquid to form a coagulated yarn, and at the other end. It is comprised so that it may be taken out of a spinning tub through the raising roll laid. The coagulating liquid is discharged into the spinning tub from a coagulating liquid ejection port disposed on the back side of the nozzle, and is allowed to flow in the running direction of the coagulated thread while coagulating the coagulated thread. Then, it flows out from the spinning bath outlet disposed at the other end to the coagulating liquid recovery section. The fiber solidified in the spinning bath (coagulated yarn) is then separated from the coagulating liquid and washed, and sent to subsequent processes such as chemical treatment, drying, and heat treatment.
The speed at which the coagulated yarn is taken up and spun is generally set to be faster than the average flow rate of the coagulating liquid supplied into the spinning tub, so that the coagulating liquid in the vicinity of the coagulated yarn is attracted to the coagulated yarn and is accompanied. Then, it is made to flow in the take-up direction at a speed close to the spinning speed (hereinafter referred to as “associated flow”). In order to compensate for this, a phenomenon occurs in which the coagulating liquid flows backward from the downstream side to the upstream side in the vicinity of the bottom wall and the side wall in the spinning bath away from the coagulated yarn. In this manner, in the spinning tub, the flow in the opposite directions of the accompanying flow and the reverse flow is generated adjacent to each other at the same time, so that they interfere with each other and the coagulation liquid circulates irregularly. There were vortices and stagnation. For this reason, there is a problem in that single yarn breakage (nest) due to poor solidification floats in the spinning tub and the yarn waste reservoir comes into contact with the fibers, resulting in deterioration of product quality and performance. Even when the spinning speed is increased in order to improve productivity, the turbulent flow of the coagulating liquid occurs more remarkably, and the coagulated yarn is shaken in the tank to cause fineness spots and single yarn breakage. It was a hindrance to stable production.
As a solution to the above problem, for example, a wet spinning apparatus described in Patent Document 1 is known. In order to suppress the turbulent flow of the coagulating liquid in the spinning tub, a coagulating liquid partition side plate (rectifier plate) is installed between the coagulated yarn and the longitudinal wall surface of the spinning tub to control the coagulating liquid flow. It is configured. The accompanying flow and the backflow are divided into the inner tank and the outer tank on both sides thereof by the coagulating liquid partition side plate, respectively, and the accompanying flow flows from the inner tank to the downstream side, and the counterflow flows from the outer tank to the upstream side. It is made to flow, is returned to the vicinity of the nozzle, and is mixed with newly supplied coagulating liquid.
JP-A-9-67714

ノズルから紡糸原液が吐出された直後の凝固過程は、この湿式紡糸装置によって得られる繊維の品質・性能に非常に大きく影響することが知られている。そのため前記ノズル近傍で凝固液の乱流が起きたり、該凝固液の濃度・温度に斑があると単糸切れや異常繊維を生じさせる原因となる。
しかしながら上記湿式紡糸装置では、凝固糸条から搾出された濃度・温度の異なる逆流液をノズル近傍に復流させ、供給される新鮮な凝固液と混合させて再び供給するようになっているため、得られる繊維の品質に斑(特に断面形状斑)を生じさせてしまう虞がある。又生産性を向上させるために紡糸速度を上げて上記随伴流量が増大した場合には、上記復流液量もそれに連れて増大し、ノズル近傍の流速が早くなりさらに大きな乱流を引き起こす虞がある。
It is known that the coagulation process immediately after the spinning stock solution is discharged from the nozzle has a great influence on the quality and performance of the fiber obtained by this wet spinning apparatus. For this reason, if the turbulent flow of the coagulating liquid occurs in the vicinity of the nozzle, or if the concentration / temperature of the coagulating liquid is uneven, it may cause single yarn breakage or abnormal fibers.
However, in the above-described wet spinning device, the backflow liquids with different concentrations and temperatures squeezed from the coagulated yarn are returned to the vicinity of the nozzle, mixed with the fresh coagulation liquid supplied, and then supplied again. In addition, there is a risk of causing spots (particularly cross-sectional shape spots) in the quality of the obtained fiber. In addition, when the spinning speed is increased in order to improve productivity and the accompanying flow rate increases, the amount of the returning liquid also increases accordingly, and the flow velocity in the vicinity of the nozzle may increase to cause a larger turbulent flow. is there.

本発明は、このような事情を考慮してなされたもので、紡浴槽内での凝固液流を制御することで該紡浴槽内における凝固液の濃度・温度を均一化し、前記凝固液の乱流によって生じる単糸切れや滞留によって発生し浮遊する糸屑(ネスト)の生成を防止し、良好な品質の繊維を製造可能とし、更に凝固液の流れを均一にすることにより高速紡糸(高速引取り)を可能とする湿式紡糸装置及び湿式紡糸方法を提供することを目的とする。   The present invention has been made in consideration of such circumstances. By controlling the flow of the coagulation liquid in the spinning tub, the concentration and temperature of the coagulation liquid in the spinning tub are made uniform, and the coagulation liquid is disturbed. It prevents the generation of floating yarn waste (nesting) caused by breakage or retention of single yarn caused by the flow, makes it possible to produce fibers of good quality, and makes the flow of the coagulation liquid uniform to achieve high speed spinning (high speed drawing). An object of the present invention is to provide a wet spinning apparatus and a wet spinning method that enable the take-up).

前記目的を達成するために、本発明は以下の手段を提案している。すなわち本発明は、紡糸原液を凝固させ凝固糸条にして紡糸する湿式紡糸装置において、凝固液を貯留する紡浴槽の一端部に、紡糸原液を前記紡浴槽の他端部に向けて吐出するノズルと、前記ノズルの背面側から前記凝固液を吐出する凝固液噴出し口とが、前記凝固液噴出し口から吐出される前記凝固液が前記ノズルの背面に衝突しないよう配設されており、前記紡浴槽の他端部に、凝固糸条を巻き回して該紡浴槽から引き上げるための引き上げロールが設けられ、前記引き上げロールよりも後方側に、前記凝固液が流出させられる凝固液回収部が設けられ、前記紡浴槽の内部が、ノズルから送り出される紡糸原液を凝固させ凝固糸条にする凝固浴部と、前記凝固糸条が走行させられる糸条走行部とに区画されるとともに、その一端部から他端部へと伸びる二つの整流板により、前記凝固糸条が走行する内槽と、その両側の外槽とに分けられ、前記両整流板は、その前記凝固浴部に形成される部分の側面に開口部を有さず、その前記糸条走行部に形成される部分の側面に開口部を有し、前記ノズルの吐出面の中心と前記引き上げロールの凝固糸条巻き回し面とが前記紡浴槽の液深の上下方向の中心位置になるよう配設され、前記ノズルの上端から前記紡浴槽の液面までの距離と、前記ノズルの下端から前記紡浴槽の底面までの距離とが、夫々10mm以上40mm以下となるように構成されることを特徴とする。  In order to achieve the above object, the present invention proposes the following means. That is, the present invention relates to a nozzle that discharges the spinning dope toward one end of the spinning tub for storing the coagulating liquid and the other end of the spinning tub in a wet spinning apparatus that coagulates and spins the spinning dope into a coagulated yarn. And a coagulating liquid ejection port for discharging the coagulating liquid from the back side of the nozzle is disposed so that the coagulating liquid discharged from the coagulating liquid ejection port does not collide with the back surface of the nozzle, The other end of the spinning tub is provided with a pulling roll for winding the coagulated yarn and pulling it up from the spinning tub, and a coagulating liquid recovery section for allowing the coagulating liquid to flow out behind the pulling roll. The spinning tub is divided into a coagulation bath part that coagulates the spinning solution fed from the nozzle to make a coagulated yarn, and a yarn traveling part that runs the coagulated yarn, and one end thereof From the other The two rectifying plates extending into the section are divided into an inner tub in which the coagulated yarn travels and an outer tub on both sides thereof, and both the rectifying plates are formed on the side surface of the portion formed in the coagulating bath portion. There is no opening, the opening is formed on the side surface of the portion formed in the yarn running portion, and the center of the discharge surface of the nozzle and the solidified yarn winding surface of the pulling roll are the spinning tub. The distance from the upper end of the nozzle to the liquid level of the spinning tub and the distance from the lower end of the nozzle to the bottom of the spinning tub are each 10 mm. It is characterized by being comprised so that it may become 40 mm or less.

この発明に係る湿式紡糸装置によれば、前記凝固液噴出し口は前記ノズルの背面側へ配設され、該凝固液噴出し口から吐出される凝固液が該ノズルの背面に衝突しないよう配設されているので、該ノズルから送り出される前記凝固糸条と前記凝固液との液抵抗を極力小さくすることが出来、又凝固液流の乱れによる前記凝固糸条の走行揺れを防止する。又前記両整流板は、その前記凝固浴部に形成される部分の側面に開口部を有さず、その前記糸条走行部に形成される部分の側面に開口部を有しているので、前記凝固糸条から搾出された凝固液及び該凝固糸条の走行によって生じる凝固液の随伴流は、前記糸条走行部に設けられる前記両整流板に備える複数の前記開口部を介して内槽からその両側の外槽へと流され、内槽・外槽夫々から下流側の前記凝固液回収部へと流出される。すなわち凝固に使用された前記凝固液は、前記ノズルの近傍に復流として戻されることなく上流側から下流側へと一定方向に流されて装置から排出されるようになっている。又前記ノズルの吐出面の中心と前記引き上げロールの凝固糸条巻き回し面とが前記紡浴槽の液深の上下方向の中心位置になるよう配設されているので、前記ノズルの先端面に掛かる前記凝固糸条の引き取り張力は該凝固糸条の中心部から外周部まで略同一の張力とする事が出来る。又前記ノズルの上端から前記紡浴槽の液面までの距離と、前記ノズルの下端から前記紡浴槽の底面までの距離とが夫々10mm以上40mm以下となるように構成されるので、前記ノズル先端面へ供給する凝固液の供給不足を起こしたりノズル近傍に凝固液の乱流や滞留を発生したりすることを極力防止することが出来る。  According to the wet spinning device of the present invention, the coagulating liquid ejection port is disposed on the back side of the nozzle, and the coagulating liquid discharged from the coagulating liquid ejection port is arranged so as not to collide with the back surface of the nozzle. Therefore, the resistance of the coagulated yarn fed from the nozzle and the coagulated liquid can be made as small as possible, and the run of the coagulated yarn caused by disturbance of the coagulated liquid flow can be prevented. Further, both the rectifying plates have no opening on the side surface of the portion formed in the coagulation bath portion, and have the opening portion on the side surface of the portion formed in the yarn running portion. The coagulated liquid squeezed from the coagulated yarn and the accompanying flow of the coagulated liquid generated by the running of the coagulated yarn are internally passed through the openings provided in the both rectifying plates provided in the yarn running portion. It flows from the tank to the outer tank on both sides, and flows out from the inner tank and the outer tank to the coagulating liquid recovery section on the downstream side. That is, the coagulation liquid used for coagulation is discharged from the apparatus by flowing in a fixed direction from the upstream side to the downstream side without returning as a return flow in the vicinity of the nozzle. Further, since the center of the discharge surface of the nozzle and the winding surface of the pulling roll on which the coagulated yarn is wound are arranged at the center position in the vertical direction of the liquid depth of the spinning tub, it is applied to the tip surface of the nozzle. The take-up tension of the solidified yarn can be made substantially the same from the center to the outer periphery of the solidified yarn. Further, since the distance from the upper end of the nozzle to the liquid surface of the spinning tub and the distance from the lower end of the nozzle to the bottom surface of the spinning tub are 10 mm or more and 40 mm or less, respectively, the nozzle tip surface It is possible to prevent the occurrence of insufficient supply of the coagulating liquid supplied to the nozzle or the occurrence of turbulent flow or stagnation of the coagulating liquid in the vicinity of the nozzle.

本発明の湿式紡糸装置を用いて合成繊維を紡糸する方法において、前記凝固液噴出し口から吐出される前記凝固液を、前記凝固糸条の走行方向と略平行に1m3/h〜3m3/hで吐出させるようにしてもよい。これにより、該凝固液の流れが前記ノズル近傍へ逆流したり乱流を起こしたりするのを極力防止することが出来る。 In the method of spinning synthetic fibers using the wet spinning device of the present invention, the coagulating liquid discharged from the coagulating liquid ejection port is used in an amount of 1 m 3 / h to 3 m 3 substantially parallel to the traveling direction of the coagulated yarn. / H may be discharged. Thereby, it is possible to prevent the flow of the coagulating liquid from flowing back to the vicinity of the nozzle or causing turbulence as much as possible.

本発明に係る湿式紡糸装置及び湿式紡糸方法によれば、紡浴槽内での凝固液流が制御され該紡浴槽内における前記凝固液の濃度・温度が均一化され、前記ノズル先端面へ供給する凝固液の供給不足を防止し、該凝固液の乱流によって生じる単糸切れや滞留によって発生する糸屑(ネスト)の生成が防止されるので、良好な品質の繊維が製造可能である。又前記凝固液の流れが均一にされるため、高速紡糸においても品質の良い繊維を安定して製造することが出来る。  According to the wet spinning device and the wet spinning method of the present invention, the coagulation liquid flow in the spinning tub is controlled, the concentration and temperature of the coagulating liquid in the spinning tub are made uniform, and supplied to the nozzle tip surface. Since insufficient supply of the coagulation liquid is prevented, and generation of yarn waste (nest) generated by single yarn breakage or stagnation caused by the turbulent flow of the coagulation liquid is prevented, it is possible to produce fibers of good quality. In addition, since the flow of the coagulation liquid is made uniform, high-quality fibers can be stably produced even in high-speed spinning.

以下、図面を参照し、この発明の実施の形態について説明する。
図1は、本発明の一実施形態の湿式紡糸装置の概略構成を示す側面図である。図2は、本発明の一実施形態の湿式紡糸装置の概略構成を示す平面図である。図1に示すようにこの湿式紡糸装置1は、凝固液Cを貯留可能に構成される紡浴槽2と、該紡浴槽2の長手方向の下流側(図1における右側)に配設され流出された前記凝固液Cを回収する凝固液回収部3とを備えている。前記紡浴槽2は、該紡浴槽2内を仕切らずに槽を形成する凝固浴部2aと糸条走行部2bとに区画されて構成されている。前記凝固浴部2aは前記紡浴槽2の上流側に配設され前記糸条走行部2bは前記紡浴槽2の下流側に配設されて、前記凝固液Cを貯留及び流通可能に構成されている。
前記凝固浴部2aは、該凝固浴部2a内の一端部に配設され前記凝固液Cを吐出する二つの凝固液噴出し口4a,4bと該凝固浴部2a内に沈設され紡糸原液を他端部へ向けて吐出させる円柱形状のノズル5とを備えている。又前記糸条走行部2bには、該糸条走行部2b内の他端部に沈設されるローラー形状の引き上げロール10が備えられている。又前記凝固液Cの液面CUと底面CBとは、略平行になるよう槽が形成されている。
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view showing a schematic configuration of a wet spinning apparatus according to an embodiment of the present invention. FIG. 2 is a plan view showing a schematic configuration of a wet spinning apparatus according to an embodiment of the present invention. As shown in FIG. 1, the wet spinning apparatus 1 is disposed on and out of a spinning tub 2 configured to be able to store a coagulating liquid C, and a downstream side in the longitudinal direction of the spinning tub 2 (right side in FIG. 1). And a coagulating liquid recovery unit 3 for recovering the coagulating liquid C. The spinning tub 2 is divided into a coagulation bath portion 2a and a yarn traveling portion 2b that form a tank without partitioning the spinning tub 2. The coagulation bath portion 2a is disposed on the upstream side of the spinning tub 2, and the yarn traveling portion 2b is disposed on the downstream side of the spinning tub 2, so that the coagulating liquid C can be stored and distributed. Yes.
The coagulation bath part 2a is disposed at one end of the coagulation bath part 2a and is disposed in two coagulation liquid outlets 4a and 4b for discharging the coagulation liquid C and the coagulation bath part 2a. And a columnar nozzle 5 for discharging toward the other end. In addition, the yarn traveling portion 2b is provided with a roller-shaped pulling roll 10 that is sunk at the other end of the yarn traveling portion 2b. A tank is formed so that the liquid surface CU and the bottom surface CB of the coagulating liquid C are substantially parallel.

図2に示すように、前記凝固液噴出し口4a,4bは、前記ノズル5の背面側へ配設されており、両凝固液噴出し口4a,4bの前記ノズル5側の壁面には多数の微細吐出孔(不図示)が夫々備えられ、該微細吐出孔より前記凝固液Cを下流側へ向けて吐出可能に構成されている。又前記凝固液噴出し口4a,4bは、両凝固液噴出し口4a,4b間を前記ノズル5の平面視外径幅と略同一寸法の幅M1だけ隔てて配設されている。そして凝固液噴出し口4aは前記紡浴槽2の槽壁面の長手方向の面を形成する紡浴槽側板21に接して設けられ、凝固液噴出し口4bも前記紡浴槽2の槽壁面の長手方向の面を形成するもう一つの紡浴槽側板22に接して設けられている。そして両凝固液噴出し口4a,4bの間には、前記の幅M1の寸法を有する補助板12が設けられている。前記補助板12は、凝固液Cの吐出孔を有さず凝固液Cを貯留可能に前記紡浴槽2の短手方向の槽壁面の一部を形成し、その両端を前記凝固液噴出し口4a,4bに支持されて形成されている。  As shown in FIG. 2, the coagulating liquid ejection ports 4a and 4b are disposed on the back side of the nozzle 5, and a large number of coagulating liquid ejection ports 4a and 4b are provided on the wall surface on the nozzle 5 side. The fine discharge holes (not shown) are respectively provided, and the coagulating liquid C can be discharged downstream from the fine discharge holes. The coagulating liquid ejection ports 4a and 4b are disposed such that the coagulating liquid ejection ports 4a and 4b are separated from each other by a width M1 having substantially the same size as the outer diameter width in a plan view of the nozzle 5. The coagulating liquid outlet 4 a is provided in contact with the spinning tub side plate 21 that forms the longitudinal surface of the tank wall surface of the spinning tub 2, and the coagulating liquid outlet 4 b is also provided in the longitudinal direction of the tank wall surface of the spinning tub 2. It is provided in contact with another spinning tub side plate 22 that forms the surface. An auxiliary plate 12 having the width M1 is provided between the coagulating liquid ejection ports 4a and 4b. The auxiliary plate 12 does not have a discharge hole for the coagulating liquid C and forms part of the tank wall surface in the short direction of the spinning tub 2 so that the coagulating liquid C can be stored. It is formed to be supported by 4a and 4b.

前記ノズル5の背面側の面を形成するノズル裏面51には、原液供給管11が接続されている。前記ノズル裏面51は、前記ノズル5と前記原液供給管11とを接続し、それらの内部に紡糸原液を流通可能に構成される。前記ノズル5の吐出面(下流側の面)には、紡出口金52が備えられている。該紡出口金52は、前記紡浴槽2内で凝固されて繊維となる前記紡糸原液を槽内へと吐出するための多数の微細送出孔(不図示)をその面に備えている。前記紡糸原液は槽内へ吐出された直後に前記凝固液Cにより凝固されて凝固糸条13となり下流側へ向かって送り出される。図1に示すように、前記ノズル5の中心軸C1は前記ノズル5の吐出面の中心を通り前記紡浴槽2の液深の上下方向の中心位置を通って前記液面CU・底面CBと略平行に該紡浴槽2の長手方向に伸びている。前記凝固糸条13は前記紡出口金52から送出されて装置の長手方向の上流側から下流側へと前記中心軸C1上に沿うように走行される。そして前記中心軸C1を通る前記引き上げロール10の凝固糸条巻き回し面30を経由して巻き回されながら矢印Fの向きに方向を変え、装置の外部に配設される引取り装置(不図示)によって引き取られるよう構成されている。
又前記ノズル5の上端から前記紡浴槽2の液面CUまでの距離L2と、前記ノズル5の下端から前記紡浴槽2の底面CBまでの距離L3とは、夫々10mm以上40mm以下となるように構成されている。
又前記凝固液噴出し口4a,4bから夫々吐出される前記凝固液Cの吐出方向は、上記凝固糸条13の走行方向と略平行になるよう構成されている。
A stock solution supply pipe 11 is connected to a nozzle back surface 51 that forms a surface on the back side of the nozzle 5. The nozzle back surface 51 is configured to connect the nozzle 5 and the stock solution supply pipe 11 so that the spinning stock solution can be circulated therein. A spout gold 52 is provided on the discharge surface (downstream surface) of the nozzle 5. The spinneret 52 is provided with a large number of fine feed holes (not shown) on its surface for discharging the spinning dope that is solidified in the spinning bath 2 into fibers. Immediately after being discharged into the tank, the spinning solution is solidified by the coagulating liquid C to become a coagulated yarn 13 and is sent downstream. As shown in FIG. 1, the central axis C <b> 1 of the nozzle 5 passes through the center of the discharge surface of the nozzle 5, passes through the center position in the vertical direction of the liquid depth of the spinning tub 2, and is substantially the same as the liquid level CU / bottom surface CB. It extends in the longitudinal direction of the spinning tub 2 in parallel. The coagulated yarn 13 is fed from the spout gold 52 and travels along the central axis C1 from the upstream side to the downstream side in the longitudinal direction of the apparatus. A take-up device (not shown) disposed outside the device changes its direction in the direction of arrow F while being wound through the coagulated yarn winding surface 30 of the pulling roll 10 passing through the central axis C1. ).
The distance L2 from the upper end of the nozzle 5 to the liquid level CU of the spinning tub 2 and the distance L3 from the lower end of the nozzle 5 to the bottom surface CB of the spinning tub 2 are 10 mm or more and 40 mm or less, respectively. It is configured.
The discharging direction of the coagulating liquid C discharged from the coagulating liquid ejection ports 4a and 4b is configured to be substantially parallel to the traveling direction of the coagulating yarn 13.

図2に示すように、前記紡浴槽2は、その槽内の一端部から他端部までに亘り形成される二つの整流板14a,14bを備えている。前記紡浴槽2は、前記整流板14a,14bの間隔により形成され前記凝固糸条13を走行させる内槽23と該内槽23の両側の部分に形成される二つの外槽24とに分けられて構成されている。又整流板14aはその一端部が前記紡浴槽側板21と前記凝固液噴出し口4aとの当接部付近に接して形成されており、他端部が前記糸条走行部2bの他端部の槽壁面を形成する紡浴槽出口15へ当接されて形成されている。又整流板14bも同様にその一端部が前記紡浴槽側板22と前記凝固液噴出し口4bとの当接部付近に接して形成され、他端部が前記紡浴槽出口15に当接されて形成されている。  As shown in FIG. 2, the spinning tub 2 includes two rectifying plates 14a and 14b formed from one end to the other end in the tank. The spinning tub 2 is divided into an inner tub 23 that is formed by an interval between the rectifying plates 14a and 14b and travels the coagulated yarn 13, and two outer tubs 24 that are formed on both sides of the inner tub 23. Configured. Further, the rectifying plate 14a is formed such that one end thereof is in contact with the vicinity of the contact portion between the spinning tub side plate 21 and the coagulating liquid ejection port 4a, and the other end is the other end of the yarn traveling portion 2b. It is formed in contact with the spinning bath outlet 15 forming the tank wall surface. Similarly, the rectifying plate 14b is formed so that one end thereof is in contact with the vicinity of the contact portion between the spinning tub side plate 22 and the coagulating liquid outlet 4b, and the other end is contacted with the spinning tub outlet 15. Is formed.

前記整流板14a,14bの前記凝固浴部2a内に形成される部分は、その該整流板14a,14bの間隔により形成される内槽23の幅を該凝固浴部2a内の一端部から他端部へと向かって滑らかに徐々にその形状を窄ませるように、又前記凝固糸条13に極力近接されて配設されている。ここで前記整流板14a,14bの側面の形状は、前記凝固液Cを滑らかに前記ノズル5近傍へと供給可能であれば特にその形状を限定されるものではないが、例えば流線型を有した曲面形状とすることが好ましい。又前記整流板14a,14bの前記糸条走行部2b内に形成される部分も、前記凝固糸条13に極力近接され該凝固糸条13と略平行に該糸条走行部2b内の一端部から他端部へと配設されている。そして前記凝固浴部2a内の他端部に形成される内槽の幅と前記糸条走行部2bの一端部に形成される内槽の幅とが同一とされて接続され、その接続部の形状は滑らかに形成されている。
図1に示すように前記整流板14a,14bは、その高さ方向を前記紡浴槽2の底面CBから液面CUの上部に亘り形成されている。又前記整流板14a,14bは、その前記凝固浴部2a内に形成される部分の側面に開口部を有さず、その前記糸条走行部2b内に形成される部分の側面に複数の開口部25を有している。又前記開口部25も、前記底面CB付近から前記液面CUの上部に亘り開口されて形成されている。前記開口部25は、図に示す縦型矩形孔(スリット)の他横型矩形孔としても良く、又図5の一例に示すように多孔パンチング孔でも良く、又楕円孔や多角形孔等でも良く、その開口形状を限定されるものではない。ただし開口面積を極端に増やした場合は整流作用本来の目的を失してしまうため適宜開けられることとし、前記糸条走行部2b内に配される前記整流板14a,14bの部分の側面に略均等に複数分布されて形成されることが好ましい。
The portion of the rectifying plates 14a, 14b formed in the coagulation bath portion 2a is different from the end of the coagulation bath portion 2a in the width of the inner tank 23 formed by the interval between the rectifying plates 14a, 14b. It is arranged as close as possible to the coagulated yarn 13 so as to smoothly and gradually narrow its shape toward the end. Here, the shape of the side surfaces of the rectifying plates 14a and 14b is not particularly limited as long as the coagulating liquid C can be smoothly supplied to the vicinity of the nozzle 5, but for example, a curved surface having a streamline shape. A shape is preferable. Further, the portion of the straightening plates 14a, 14b formed in the yarn running portion 2b is also as close as possible to the coagulated yarn 13 and one end portion in the yarn running portion 2b substantially parallel to the coagulated yarn 13. To the other end. And the width of the inner tub formed at the other end in the coagulation bath portion 2a and the width of the inner tub formed at one end of the yarn traveling portion 2b are made the same and connected, The shape is formed smoothly.
As shown in FIG. 1, the rectifying plates 14 a and 14 b are formed in the height direction from the bottom surface CB of the spinning tub 2 to the upper portion of the liquid level CU. The rectifying plates 14a and 14b do not have an opening on the side surface of the portion formed in the coagulation bath portion 2a, and have a plurality of openings on the side surface of the portion formed in the yarn traveling portion 2b. Part 25. The opening 25 is also formed to open from the vicinity of the bottom surface CB to the top of the liquid level CU. The opening 25 may be a horizontal rectangular hole other than the vertical rectangular hole (slit) shown in the drawing, may be a perforated punching hole as shown in an example of FIG. 5, or may be an elliptical hole or a polygonal hole. The opening shape is not limited. However, if the opening area is extremely increased, the original purpose of the rectifying action is lost, so that it can be opened as appropriate, and the rectifying plates 14a and 14b arranged in the yarn traveling portion 2b are substantially disposed on the side surfaces. It is preferable that a plurality of them are uniformly distributed.

図3は図2におけるX−X線断面図を示し、図4は図2におけるY−Y線断面図を示す。前記X−X線断面図は、図2における前記紡出口金52の面(ノズル5吐出面)における装置の断面を示している。又前記Y−Y線断面図は、図2における糸条走行部2bの任意の面における装置の断面を示している。又図3における前記内槽23の幅を幅M2とし、図4における前記内槽23の幅を幅M3とする。ここで前記幅M3は、前記幅M2に対して30%〜80%の範囲となるように形成されるのが好ましい。  3 shows a cross-sectional view taken along line XX in FIG. 2, and FIG. 4 shows a cross-sectional view taken along line YY in FIG. The XX sectional view shows a section of the apparatus on the surface (nozzle 5 discharge surface) of the spinning nozzle 52 in FIG. The YY sectional view shows a section of the device on an arbitrary surface of the yarn traveling portion 2b in FIG. Further, the width of the inner tank 23 in FIG. 3 is defined as a width M2, and the width of the inner tank 23 in FIG. 4 is defined as a width M3. Here, the width M3 is preferably formed to be in a range of 30% to 80% with respect to the width M2.

図6は、前記糸条走行部2bの他端部に設けられる紡浴槽出口15の出口孔形状を示す図である。前記紡浴槽出口15に複数備えられる出口孔30は、該紡浴槽出口15の全体から凝固液Cを略均等に排出可能な横型矩形孔に形成されている。ただし該出口孔30の形状は、前記凝固液Cを前記紡浴槽出口15の全体から略均等に排出可能な形状であればその形状を限定されるものではなく、図に示す以外に多孔パンチング孔、楕円孔、多角形孔等でも良い。ただし開口面積を極端に増やした場合は凝固液Cを均等排出させるという本来の目的を失してしまうため、適宜開けられることとし前記紡浴槽出口15に略均等に複数分布されて形成されることが好ましい。  FIG. 6 is a view showing the shape of the outlet hole of the spinning tub outlet 15 provided at the other end of the yarn traveling portion 2b. A plurality of outlet holes 30 provided in the spinning tub outlet 15 are formed as horizontal rectangular holes that can discharge the coagulating liquid C from the entire spinning tub outlet 15 substantially uniformly. However, the shape of the outlet hole 30 is not limited as long as the coagulating liquid C can be discharged from the entire spinning tub outlet 15 substantially uniformly. An elliptical hole, a polygonal hole, or the like may be used. However, when the opening area is extremely increased, the original purpose of uniformly discharging the coagulating liquid C is lost, and therefore, it should be opened as appropriate, and a plurality of the tub outlets 15 should be formed so as to be distributed substantially evenly. Is preferred.

図2に示すように前記凝固糸条13を前記紡浴槽2の長手方向に浸漬させる浸漬長L1(凝固浴部長+糸条走行部長)は、引き取られる該凝固糸条13が十分に凝固可能であれば特に限定されるものではないが、300mmから1100mmの間に設定されるのが好ましい。又前記凝固浴部2aと前記糸条走行部2bの長手方向の各長さは、装置の生産速度(凝固糸条引取り速度)、ノズルサイズ、トウ(凝固糸条)サイズ、随伴流量、逆流液量、凝固条件等によって夫々最適な比率により設定する事が出来るが、該凝固浴部2aと該糸条走行部2bとの長さの比率を1対1〜1対5の間で設定することが好ましい。  As shown in FIG. 2, the immersion length L1 (coagulation bath portion length + thread running portion length) in which the coagulated yarn 13 is immersed in the longitudinal direction of the spinning tub 2 is such that the coagulated yarn 13 to be taken can be sufficiently solidified. Although it will not specifically limit if it exists, it is preferable to set between 300 mm and 1100 mm. The lengths of the coagulation bath portion 2a and the yarn running portion 2b in the longitudinal direction are the production speed of the device (coagulation yarn take-up speed), nozzle size, tow (coagulation yarn) size, associated flow rate, back flow. Although it can be set at an optimum ratio depending on the liquid amount, coagulation conditions, etc., the ratio of the length of the coagulation bath portion 2a and the yarn running portion 2b is set between 1: 1 to 1: 5. It is preferable.

次に、以上のように構成された湿式紡糸装置1を用いて合成繊維を紡糸する方法について説明する。図1において、紡糸原液が原液供給管11に原液供給装置(不図示)により供給されると、該紡糸原液は該原液供給管11から前記ノズル裏面51を介し前記ノズル5へと送られる。該紡糸原液は該ノズル5の吐出面である前記紡糸口金52より前記凝固液C内へと送り出され凝固されて前記凝固糸条13となる。
該凝固糸条13は前記糸条走行部2b内の長手方向の他端部に沈設される引き上げロール10を介し装置外部の引取り装置(不図示)に引き取られながら、前記紡浴槽2内を上流側から下流側へ向かって走行する。該凝固糸条13の走行方向は、装置の底面CB・液面CUと略平行に配される前記ノズル5の中心軸C1上に沿うように設定されており、該凝固糸条13は前記引き上げロール10の凝固糸条巻き回し面30に巻き回された後に矢印Fの方向に向きを変更されて装置から排出され、その後の洗浄・延伸工程へと送られるようになっている。
ここで前記ノズル5の吐出面の中心と前記凝固糸条巻き回し面30の位置とが前記紡浴槽2の液深の上下方向の中心位置になるよう配設されているので、前記ノズル5の先端面に掛かる前記凝固糸条13の引き取り張力は該凝固糸条13の中心部から外周部まで略同一の張力とする事が出来、局所的に生じる過剰な引き取り張力に起因する単糸切れを極力低減する事が可能となる。又前記凝固糸条13の凝固化が均一に行われる。
又前記ノズル5の上端から前記紡浴槽2の液面CUまでの距離L2と、前記ノズル5の下端から前記紡浴槽2の底面CBまでの距離L3とが夫々10mm以上40mm以下となるように構成されているので、前記ノズル5の吐出面へ供給する凝固液Cの供給不足を防止し、前記ノズル5近傍に凝固液Cの乱流や滞留を発生したりすることを防止することが出来る。仮に前記距離L2及び距離L3を10mmより小さい値とした場合は、前記ノズル5の吐出面に供給される凝固液Cの供給不足により前記凝固糸条13へ均一な凝固を行うことが難しく、特に前記ノズル5の上部付近の液面CUにおいては上記供給不足による渦巻きも発生して乱流が起きる。又前記距離L2及び距離L3を40mmより大きい値とした場合も、前記凝固糸条13から離れた位置で前記凝固液Cの滞留が発生するようになり、特に前記ノズル5の上部付近の液面CUにおいて単糸切れした糸屑(ネスト)が浮遊するようになる。そしてその後の洗浄・延伸工程でのトラブルの原因にもなる。
Next, a method for spinning synthetic fibers using the wet spinning apparatus 1 configured as described above will be described. In FIG. 1, when a spinning solution is supplied to a stock solution supply pipe 11 by a stock solution supply device (not shown), the spinning solution is sent from the stock solution supply pipe 11 to the nozzle 5 through the nozzle back surface 51. The spinning dope is fed into the coagulating liquid C from the spinneret 52 which is the discharge surface of the nozzle 5 and coagulated to form the coagulated yarn 13.
The coagulated yarn 13 is taken up in the spinning tub 2 while being taken up by a take-up device (not shown) outside the device through a pulling roll 10 that is set at the other end in the longitudinal direction in the yarn running portion 2b. Travel from the upstream side toward the downstream side. The direction of travel of the solidified yarn 13 is set along the central axis C1 of the nozzle 5 arranged substantially parallel to the bottom surface CB and the liquid level CU of the apparatus. After being wound around the coagulated yarn winding surface 30 of the roll 10, the direction is changed in the direction of arrow F, the sheet is discharged from the apparatus, and sent to the subsequent cleaning / stretching process.
Here, since the center of the discharge surface of the nozzle 5 and the position of the coagulated yarn winding surface 30 are arranged so as to be the center position in the vertical direction of the liquid depth of the spinning tub 2, The take-up tension of the coagulated yarn 13 applied to the front end surface can be made substantially the same from the center to the outer periphery of the coagulated yarn 13, and single yarn breakage caused by excessive take-up tension generated locally can be prevented. It is possible to reduce as much as possible. Further, the coagulated yarn 13 is uniformly solidified.
The distance L2 from the upper end of the nozzle 5 to the liquid level CU of the spinning tub 2 and the distance L3 from the lower end of the nozzle 5 to the bottom surface CB of the spinning tub 2 are configured to be 10 mm or more and 40 mm or less, respectively. Therefore, it is possible to prevent insufficient supply of the coagulating liquid C supplied to the discharge surface of the nozzle 5 and to prevent the coagulating liquid C from being turbulent or staying in the vicinity of the nozzle 5. If the distance L2 and the distance L3 are smaller than 10 mm, it is difficult to uniformly solidify the solidified yarn 13 due to insufficient supply of the solidified liquid C supplied to the discharge surface of the nozzle 5, At the liquid level CU near the upper part of the nozzle 5, vortexes are also generated due to the above-mentioned insufficient supply, resulting in turbulent flow. Further, even when the distance L2 and the distance L3 are set to values larger than 40 mm, the coagulation liquid C stays at a position away from the coagulated yarn 13, and particularly the liquid surface near the upper portion of the nozzle 5. In the CU, single thread breakage (nesting) comes to float. And it becomes a cause of trouble in the subsequent cleaning / stretching process.

前記凝固液Cは、前記凝固液噴出し口4a,4bのノズル5側の面に備えられる多数の微細吐出孔(不図示)から下流側へ向かって前記凝固糸条13の走行方向と略平行になるように吐出される。図2において符号無しの矢印は該凝固液Cの対流方向を示す。前記凝固液噴出し口4a,4bから吐出される前記凝固液Cは前記凝固糸条13が引取り装置(不図示)により引き取られて走行する際に発生する随伴流に伴い前記紡浴槽2内の上流側から下流側へ向かって流されていく。前記凝固液Cが前記凝固液噴出し口4a,4bから吐出される方向は前記凝固糸条13の進行方向と略平行とされているので前記凝固糸条13と該凝固液Cとの液抵抗を極力小さくすることが出来、凝固液流の乱れによる凝固糸条13の走行揺れを防止して繊維の均一な凝固化を可能としている。
又前記凝固液噴出し口4a,4bは、該凝固液噴出し口4a,4bから吐出される前記凝固液Cが前記ノズル裏面51に衝突しないように夫々間隔を開けて配設されており、前記紡出口金52から送出された直後の凝固糸条13周囲において凝固液流が極力乱されないように構成されている。又前記凝固液Cの吐出量は、紡糸原液送出量、ノズル孔数、ノズル径、引取り速度に合わせ設定変更されることが必要であるが、1錘(1槽)あたり1m3/h〜3m3/hの範囲とされる事が好ましい。仮に前記凝固液Cの吐出量が1m3/hより少ない場合には、該凝固液Cの供給量不足を補充するため凝固液流がノズル5近傍に逆流し紡浴槽2内の凝固液流全体の乱流や浴液抵抗の増大を引き起こす原因となる。又仮に吐出量が3m3/hより多い場合には、走行する前記凝固糸条13と随伴する凝固液Cの流速とのバランスが崩れ凝固液流の乱流が発生し該凝固糸条13の接着や単糸切れを生じさせる原因となる。
The coagulating liquid C is substantially parallel to the traveling direction of the coagulated yarn 13 from a plurality of fine discharge holes (not shown) provided on the nozzle 5 side surface of the coagulating liquid ejection ports 4a and 4b toward the downstream side. It is discharged to become. In FIG. 2, the arrow without a symbol indicates the convection direction of the coagulating liquid C. The coagulating liquid C discharged from the coagulating liquid ejection ports 4a and 4b is generated in the spinning tub 2 along with an accompanying flow generated when the coagulated yarn 13 travels by being taken up by a take-up device (not shown). From the upstream side to the downstream side. The direction in which the coagulated liquid C is discharged from the coagulated liquid ejection ports 4a and 4b is substantially parallel to the traveling direction of the coagulated thread 13, so that the liquid resistance between the coagulated thread 13 and the coagulated liquid C is the same. Can be made as small as possible, and the running fluctuation of the coagulated yarn 13 due to the disturbance of the coagulating liquid flow can be prevented, and the fibers can be coagulated uniformly.
The coagulating liquid ejection ports 4a and 4b are spaced apart from each other so that the coagulating liquid C discharged from the coagulating liquid ejection ports 4a and 4b does not collide with the nozzle back surface 51. The coagulating liquid flow is configured not to be disturbed as much as possible around the coagulated yarn 13 immediately after being delivered from the spinning nozzle 52. The discharge amount of the coagulation liquid C needs to be set and changed in accordance with the spinning raw material feed amount, the number of nozzle holes, the nozzle diameter, and the take-up speed, but from 1 m 3 / h per spindle (one tank) The range is preferably 3 m 3 / h. If the discharge amount of the coagulating liquid C is less than 1 m 3 / h, the coagulating liquid flow reversely flows in the vicinity of the nozzle 5 in order to make up for the insufficient supply amount of the coagulating liquid C, and the entire coagulating liquid flow in the spinning bath 2 Cause turbulent flow and increased bath fluid resistance. If the discharge rate is larger than 3 m 3 / h, the balance between the traveling coagulated yarn 13 and the flow velocity of the coagulating liquid C accompanying it is lost, and a turbulent flow of the coagulating liquid flow is generated. This can cause adhesion or single yarn breakage.

前記凝固液噴出し口4a,4bから吐出された前記凝固液Cは、前記凝固浴部2a内に配設される前記両整流板14a,14bの間隔により形成される内槽23の幅が該凝固浴部2a内の一端部から他端部へと向かって滑らかに徐々にその形状を窄ませるよう変化するのに伴い前記ノズル5近傍に滑らかに極力乱流を起こすことなく供給されるようになっている。又前記ノズル5近傍に供給された前記凝固液Cは、前記凝固糸条13に略均一に吸入された後、該凝固糸条13が引き上げロール10へ向かって走行されていくに従って徐々に浴槽内へと搾出される。そして該凝固糸条13から搾出された前記凝固液C及び前記凝固糸条13の走行によって生じる前記凝固液Cの随伴流は、前記糸条走行部2b内に設けられる前記整流板14a,14bの部分の側面に備えられる複数の前記開口部25を介して内槽23からその両側の外槽24へと流されていく。そして前記凝固液Cは、前記内槽23及びその両側の外槽24の夫々より前記紡浴槽出口15に配される複数の前記出口孔30を介して該紡浴槽出口15全体から略均等になるよう前記凝固液回収部3へと流出される。
すなわち前記凝固液噴出し口4a,4bから吐出された前記凝固液Cは、凝固に使用された後従来の装置のように前記ノズル5の近傍に復流として戻されることなく、前記出口孔30を介して前記凝固液回収部3へと流出されるまでの間前記紡浴槽2内を上流側から下流側へと一定方向に前記凝固糸条13が走行する方向と略平行に流された後、前記紡浴槽出口15全体から略均等に流出されるようになっている。
尚図示しないが装置から排出された前記凝固液Cは、回収タンクにより回収され紡糸条件に適した凝固濃度となるようDI水を添加・調整されて、再びポンプにより前記凝固液噴出し口4a,4bへと供給されるよう循環されて構成されている。
The coagulating liquid C discharged from the coagulating liquid ejection ports 4a and 4b has a width of the inner tank 23 formed by the interval between the both rectifying plates 14a and 14b disposed in the coagulating bath portion 2a. As the shape changes smoothly and gradually from one end to the other end in the coagulation bath portion 2a, it is supplied smoothly in the vicinity of the nozzle 5 without causing turbulence as much as possible. It has become. The coagulated liquid C supplied to the vicinity of the nozzle 5 is sucked into the coagulated yarn 13 substantially uniformly, and then gradually moves into the bathtub as the coagulated yarn 13 travels toward the pulling roll 10. Squeezed into. The coagulated liquid C squeezed from the coagulated yarn 13 and the accompanying flow of the coagulated liquid C generated by the running of the coagulated yarn 13 are the rectifying plates 14a and 14b provided in the yarn running portion 2b. It flows from the inner tub 23 to the outer tubs 24 on both sides thereof through the plurality of openings 25 provided on the side of this portion. The coagulating liquid C becomes substantially uniform from the entire spinning tub outlet 15 through the plurality of outlet holes 30 arranged in the spinning tub outlet 15 from the inner tub 23 and the outer tubs 24 on both sides thereof. The coagulated liquid recovery unit 3 flows out.
That is, the coagulating liquid C discharged from the coagulating liquid ejection ports 4a and 4b is used for coagulation and is not returned as a return flow in the vicinity of the nozzle 5 as in the conventional apparatus, but the outlet hole 30 is used. After flowing through the spinning tub 2 from the upstream side to the downstream side in a certain direction until it flows out to the coagulating liquid recovery unit 3 through the slag, the coagulated yarn 13 travels in a direction substantially parallel to the direction. The spout tub outlet 15 is allowed to flow out almost uniformly.
Although not shown, the coagulating liquid C discharged from the apparatus is recovered by a recovery tank, DI water is added and adjusted so as to have a coagulation concentration suitable for the spinning conditions, and the coagulating liquid outlet 4a, It is circulated so that it may be supplied to 4b.

又前記整流板14a,14bの前記糸条走行部2bの部分に形成される複数の前記開口部25は、底面CB付近から液面CUの上部に亘りその開口孔が形成されている。通常、紡浴槽2内に発生する凝固液Cの逆流や滞留は、主に凝固糸条13が走行される箇所から離れた随伴流が届かない箇所で発生する。仮に前記整流板14a,14bが液面CUに開口部25を有しない場合には、前記凝固糸条13から離れた位置にある液面付近の凝固液Cが該凝固糸条13の走行方向と逆流する現象が生じるため、上記開口形状によりこれを防止可能とされている。又前記糸条走行部2bに配設される前記整流板14a,14bの部分はその側面を前記凝固糸条13に極力近接されるよう構成されているため、平面視前記凝固糸条13が走行する前記内槽23の幅方向についても上記の逆流現象を極力防止可能に構成されている。又同様に、前記凝固糸条13と前記底面CB間及び該凝固糸条13と前記液面CU間の距離も可能な限り近接させて構成されることが逆流防止のためにより好ましい。   The plurality of openings 25 formed in the yarn traveling portion 2b of the rectifying plates 14a and 14b have opening holes extending from the vicinity of the bottom surface CB to the top of the liquid level CU. Usually, the backflow or stagnation of the coagulating liquid C generated in the spinning tub 2 is mainly generated at a location where the accompanying flow away from the location where the coagulated yarn 13 travels does not reach. If the rectifying plates 14a and 14b do not have the opening 25 in the liquid level CU, the coagulated liquid C near the liquid surface at a position away from the coagulated yarn 13 is moved in the traveling direction of the coagulated yarn 13. Since a reverse flow phenomenon occurs, this can be prevented by the opening shape. Further, the portions of the rectifying plates 14a and 14b disposed in the yarn running portion 2b are configured such that the side surfaces thereof are as close as possible to the coagulated yarn 13, so that the coagulated yarn 13 runs in plan view. In the width direction of the inner tub 23, the backflow phenomenon is configured to be prevented as much as possible. Similarly, it is more preferable that the distance between the coagulated yarn 13 and the bottom surface CB and the distance between the coagulated yarn 13 and the liquid surface CU be as close as possible to prevent backflow.

又前記糸条走行部2bに形成される前記内槽の幅M3は、前記紡出口金52の面(ノズル5吐出面)に形成される前記内槽の幅M2の30%〜80%の範囲とされることが好ましい。仮に前記幅M3を前記幅M2の30%未満とすると、走行する前記凝固糸条13が前記整流板14a,14bに接触する虞があり、安定した生産が不可能となる。又逆に前記幅M3を前記幅M2の80%より大きくした場合には、前記凝固糸条13と前記整流板14a,14bとに生じる隙間が大きくなり、隙間に沿って凝固液Cが逆流するため良好な繊維の生産を行うことが不可能となる。又前記両整流板14a,14bの間隔はその生産品種、生産量、トウボリュウム等によって上記範囲の間において必要に応じ変更されることが好ましい。
又万一前記凝固糸条13が前記整流板14a,14bに接触した場合に起こる単糸切れを防止するため、該整流板14a,14bの該凝固糸条13側の面は極力平滑に形成され突起等を存在させないことが好ましい。又前記整流板14a,14bの側面にハードクロムメッキを施したステンレス板を用いたり、フッ素樹脂などの摩擦係数の小さい材料をコーティングしたりすることがより望ましい。
The width M3 of the inner tub formed in the yarn traveling portion 2b is in the range of 30% to 80% of the width M2 of the inner tub formed on the surface of the spinning nozzle 52 (nozzle 5 discharge surface). It is preferable that If the width M3 is less than 30% of the width M2, the traveling solidified yarn 13 may come into contact with the rectifying plates 14a and 14b, and stable production becomes impossible. On the contrary, when the width M3 is larger than 80% of the width M2, a gap generated between the solidified yarn 13 and the rectifying plates 14a and 14b becomes large, and the coagulating liquid C flows backward along the gap. Therefore, it becomes impossible to produce a good fiber. Moreover, it is preferable that the space | interval of both the said baffle plates 14a and 14b is changed as needed between the said ranges with the production kind, production amount, tow volume, etc.
In addition, in order to prevent breakage of the single yarn that occurs when the coagulated yarn 13 contacts the rectifying plates 14a and 14b, the surface of the rectifying plates 14a and 14b on the coagulated yarn 13 side is formed as smooth as possible. It is preferable that no protrusions exist. Further, it is more preferable to use a stainless steel plate with hard chrome plating on the side surfaces of the rectifying plates 14a and 14b, or to coat a material having a small friction coefficient such as a fluororesin.

以上説明した通り、本実施形態による湿式紡糸装置及び湿式紡糸方法によれば、前記凝固液Cは前記凝固液噴出し口4a,4bから夫々前記凝固糸条13の走行方向と略平行になる様に吐出され、前記凝固液噴出し口4a,4bは吐出された凝固液流が前記ノズル裏面51に衝突しないよう補助板12の幅M1だけ隔てて配設されている。これにより前記凝固糸条13と凝固液Cとの液抵抗を極力小さくすることが出来、凝固液流の乱れによる凝固糸条13の走行揺れを防止することが出来る。すなわち紡糸される繊維の品質・性能に非常に大きく影響するといわれる紡糸原液から吐出された直後の凝固過程において、該凝固液Cに極力乱流を起こしにくいようになっているため、繊維の接着や単糸切れ、繊度斑や異常繊維の発生を極力防止することが可能である。
又前記ノズル5の吐出面の中心と前記引き上げロール10の凝固糸条巻き回し面30の位置とが前記紡浴槽2の液深の上下方向の中心位置になるよう配設されているので、前記ノズル5の吐出面に掛かる前記凝固糸条13の引き取り張力は該凝固糸条13の中心部から外周部まで略同一の張力とする事が出来、局所的に生じる過剰な引き取り張力に起因する単糸切れを低減する事が可能となり、又前記凝固糸条13の凝固化が均一に行われる。
又前記ノズル5の上端から前記紡浴槽2の液面CUまでの距離L2と、前記ノズル5の下端から前記紡浴槽2の底面CBまでの距離L3とが夫々10mm以上40mm以下となるように構成されているので、前記ノズル5の吐出面へ供給する凝固液Cの供給不足を起こしたり前記ノズル5近傍に凝固液Cの乱流や滞留を発生したりすることを極力防止することが出来る。よって前記紡浴槽2内における凝固液Cの濃度・温度斑を防止し、前記凝固液Cが滞留して単糸切れした糸屑(ネスト)が浮遊し、繊維に付着して繊維不良を発生させるのを防止し、良好で安定した繊維の製造を行うことが可能である。
又前記凝固液Cの吐出量は、1錘(1槽)あたり1m3/h〜3m3/hの範囲に設定されているため、該凝固液Cの流れが前記ノズル5近傍へ逆流したり乱流を起こしたりすることを極力防止することが出来る。
As described above, according to the wet spinning apparatus and the wet spinning method according to the present embodiment, the coagulating liquid C is substantially parallel to the traveling direction of the coagulated yarn 13 from the coagulating liquid ejection ports 4a and 4b. The coagulating liquid ejection ports 4a and 4b are disposed with a width M1 of the auxiliary plate 12 so that the discharged coagulating liquid flow does not collide with the nozzle back surface 51. As a result, the liquid resistance between the coagulated yarn 13 and the coagulated liquid C can be made as small as possible, and the running fluctuation of the coagulated yarn 13 due to the disturbance of the coagulated liquid flow can be prevented. In other words, in the coagulation process immediately after being discharged from the spinning dope, which is said to have a great influence on the quality and performance of the fiber to be spun, the coagulation liquid C is less likely to cause turbulent flow. It is possible to prevent the occurrence of single yarn breakage, fineness spots and abnormal fibers as much as possible.
The center of the discharge surface of the nozzle 5 and the position of the coagulated yarn winding surface 30 of the pulling roll 10 are arranged so as to be the center position in the vertical direction of the liquid depth of the spinning tub 2. The take-up tension of the coagulated yarn 13 applied to the discharge surface of the nozzle 5 can be made substantially the same from the center to the outer peripheral portion of the coagulated yarn 13 and is simply caused by excessive take-up tension generated locally. It is possible to reduce yarn breakage, and the coagulated yarn 13 is uniformly solidified.
The distance L2 from the upper end of the nozzle 5 to the liquid level CU of the spinning tub 2 and the distance L3 from the lower end of the nozzle 5 to the bottom surface CB of the spinning tub 2 are configured to be 10 mm or more and 40 mm or less, respectively. Therefore, it is possible to prevent the occurrence of insufficient supply of the coagulating liquid C supplied to the discharge surface of the nozzle 5 or the occurrence of turbulent flow or stagnation of the coagulating liquid C in the vicinity of the nozzle 5 as much as possible. Therefore, the concentration / temperature spots of the coagulating liquid C in the spinning tub 2 are prevented, and the coagulating liquid C stays and single yarn breakage (nest) floats and adheres to the fiber to generate a fiber defect. It is possible to produce a good and stable fiber.
The discharge amount of the solidifying solution C, because they are set in the range of 1 weight (1 tank) per 1m 3 / h~3m 3 / h, or the flow of the coagulating solution C flows back into the nozzle 5 near It is possible to prevent turbulent flow as much as possible.

又前記凝固液噴出し口4a,4bから吐出された前記凝固液Cは、前記凝固浴部2a内に配設される両整流板14a,14bの間隔により形成される内槽23の幅が該凝固浴部2a内の一端部から他端部へと向かって滑らかに徐々にその形状を窄ませるよう変化するのに伴って、前記ノズル5近傍に滑らかに極力乱流を起こすことなく供給されるようになっている。よって新鮮な凝固液Cが前記ノズル5近傍に滑らかに供給されるため、凝固液置換効率を向上させることが可能となり良好な繊維の製造が可能となる。
又前記凝固糸条13から搾出された前記凝固液C及び該凝固糸条13の走行によって生じる前記凝固液Cの随伴流は、前記糸条走行部2b内に設けられる前記整流板14a,14bの部分の複数の前記開口部25を介して内槽23からその両側の外槽24へと流され、前記内槽23と外槽24との夫々から前記紡浴槽出口15の複数の前記出口孔30を介して該紡浴槽出口15の全体から略均等に前記凝固液回収部3へと流出される。従来の一般的な装置のように前記紡浴槽出口15の上部より凝固液Cを溢れさせて流出させる構成と比較し、本発明の構成によれば前記出口孔30を介して紡浴槽出口15の全体から前記凝固液Cを略均等に流出させられるようになっているため、前記紡浴槽2内の他端部付近における乱流の発生も防止出来、より安定した一定方向の対流とすることが可能である。
すなわち前記凝固液Cは前記紡浴槽2内を前記凝固糸条13が走行する方向と略平行に上流側から下流側へと一定方向に流されて、前記ノズル5の近傍に復流として戻されることなく装置から排出されるようになっているため紡浴槽2内に逆流・滞留などの乱流を起こすことなく、前記凝固液Cの濃度・温度斑に起因する前記凝固糸条13の接着や単糸切れや異常繊維の発生を防止し、良好な品質の繊維を安定して製造することが可能である。
The coagulating liquid C discharged from the coagulating liquid ejection ports 4a and 4b has a width of the inner tub 23 formed by the distance between the rectifying plates 14a and 14b disposed in the coagulating bath portion 2a. As the shape changes smoothly and gradually from one end to the other end in the coagulation bath 2a, it is supplied in the vicinity of the nozzle 5 without causing turbulence as smoothly as possible. It is like that. Therefore, since the fresh coagulation liquid C is smoothly supplied in the vicinity of the nozzle 5, the coagulation liquid replacement efficiency can be improved and good fibers can be produced.
The coagulated liquid C squeezed from the coagulated yarn 13 and the accompanying flow of the coagulated liquid C generated by the running of the coagulated yarn 13 are the rectifying plates 14a and 14b provided in the yarn running portion 2b. From the inner tank 23 to the outer tanks 24 on both sides thereof through the plurality of openings 25, the plurality of outlet holes of the spinning tub outlet 15 from each of the inner tank 23 and the outer tank 24. Through 30, the whole of the spinning bath outlet 15 flows out to the coagulating liquid recovery section 3 substantially evenly. Compared with the configuration in which the coagulation liquid C overflows and flows out from the upper part of the spinning tub outlet 15 as in the conventional general apparatus, according to the configuration of the present invention, the spinning tub outlet 15 is connected via the outlet hole 30. Since the coagulating liquid C is allowed to flow out almost uniformly from the whole, it is possible to prevent the occurrence of turbulent flow in the vicinity of the other end in the spinning tub 2 and to make the convection in a more stable and constant direction. Is possible.
That is, the coagulation liquid C is caused to flow in a fixed direction from the upstream side to the downstream side in the spinning tub 2 substantially in parallel with the direction in which the coagulated yarn 13 travels, and is returned to the vicinity of the nozzle 5 as a return flow. Without causing turbulent flow such as backflow or stagnation in the spinning tub 2, without causing turbulent flow in the spinning tub 2, It is possible to stably produce good quality fibers by preventing single yarn breakage and abnormal fibers.

又前記糸条走行部2bに形成される前記内槽の幅M3は、前記紡出口金52の面(ノズル5吐出面)に形成される前記内槽の幅M2の30%〜80%の範囲とされているため、走行する前記凝固糸条13が前記整流板14a,14bに近接され過ぎて接触し単糸切れを起こしたり、又前記凝固糸条13と前記整流板14a,14bとに生じる隙間に前記凝固液Cが逆流したりすることなく、良好な繊維の生産を安定して行うことが出来る。  The width M3 of the inner tub formed in the yarn traveling portion 2b is in the range of 30% to 80% of the width M2 of the inner tub formed on the surface of the spinning nozzle 52 (nozzle 5 discharge surface). Therefore, the traveling coagulated yarn 13 is too close to the rectifying plates 14a and 14b to come into contact with each other to cause a single yarn breakage, or occurs in the coagulated yarn 13 and the rectifying plates 14a and 14b. Good fiber production can be stably performed without the coagulating liquid C flowing back into the gap.

又この湿式紡糸装置1は、その生産性を向上させるために紡糸速度を上げて上記随伴流量が増大した場合にも、前記凝固液Cの流れを上記構成により上流側から下流側へと一定方向へ均一に制御することが出来るため、高速紡糸(高速引取り)においても前記凝固液Cに乱流を起こしにくく、乱流によって生じる単糸切れや滞留により発生し浮遊する糸屑(ネスト)の生成を防止し、良好な品質の繊維を安定して製造することが可能である。  In addition, the wet spinning apparatus 1 is configured so that the flow of the coagulation liquid C is increased from the upstream side to the downstream side by the above configuration even when the accompanying flow rate is increased by increasing the spinning speed in order to improve the productivity. Since the coagulating liquid C is less likely to cause turbulence even during high speed spinning (high speed take-up), the yarn waste (nesting) that is generated and floats due to single yarn breakage or stagnation caused by the turbulent flow. It is possible to prevent production and stably produce a fiber of good quality.

以下、本発明を実施例により具体的に説明する。ただし本発明はこれら実施例に限定されるものではない。
本実施例における評価方法は以下の通りである。
Hereinafter, the present invention will be specifically described by way of examples. However, the present invention is not limited to these examples.
The evaluation method in the present example is as follows.

アクリロニトリル、アクリルアミド、メタクリル酸を、過硫酸アンモニウム−亜硫酸水素アンモニウムおよび硫酸鉄の存在下、水系懸濁重合により共重合し、アクリロニトリル単位/アクリルアミド/メタクリル酸単位=96/3/1(質量%比)からなるアクリロニトリル系重合体を得た。このアクリロニトリル系重合体をジメチルアセトアミドに溶解し21質量%の紡糸原液を調製した。  Acrylonitrile, acrylamide and methacrylic acid are copolymerized by aqueous suspension polymerization in the presence of ammonium persulfate-ammonium hydrogen sulfite and iron sulfate, and from acrylonitrile units / acrylamide / methacrylic acid units = 96/3/1 (mass% ratio). An acrylonitrile-based polymer was obtained. This acrylonitrile-based polymer was dissolved in dimethylacetamide to prepare a 21% by mass spinning dope.

前記紡糸原液を孔数24,000、孔径60μmの紡糸口金52を通して、濃度60質量%、温度35℃のジメチルアセトアミド水溶液からなる凝固液C中へ吐出し、図1、図2の諸元として表1に示す値の湿式紡糸装置1にて湿式紡糸し、吐出され凝固された凝固糸条13を紡糸原液の吐出線速度の0.45倍の引き取り速度で引き取った。
ついでこの繊維に対して水洗と同時に3倍の延伸を行い、1.5質量%に調製したアミノシリコン系油剤の第一油浴槽に導き第一油剤を付与した後、この繊維を熱ロールを用いて乾燥し熱ロール間による乾熱二次延伸を2.0倍行った。その後タッチロールにて繊維の水分率を調整し、単繊維繊度1.2dtexの炭素繊維前駆体繊維をワインダーで捲き採った。
The spinning dope is discharged through a spinneret 52 having a pore number of 24,000 and a pore diameter of 60 μm into a coagulating liquid C composed of a dimethylacetamide aqueous solution having a concentration of 60% by mass and a temperature of 35 ° C. The coagulated yarn 13 which was wet-spun by the wet-spinning apparatus 1 having a value of 1 and discharged and solidified was taken up at a take-up speed 0.45 times the discharge linear speed of the spinning dope.
Next, the fiber was stretched 3 times at the same time as washing with water, and the fiber was guided to the first oil bath of the aminosilicone-based oil prepared to 1.5% by mass. Then, dry heat secondary stretching between hot rolls was performed 2.0 times. Thereafter, the moisture content of the fibers was adjusted with a touch roll, and carbon fiber precursor fibers having a single fiber fineness of 1.2 dtex were collected with a winder.

(凝固液流動状況)
紡浴槽2内にDI水をスポイトで滴下し、その流動状況を目視にて確認した。
(滞留部有無)
滞留状況を目視にて確認した。
(Coagulation fluid flow situation)
DI water was dropped into the spinning tub 2 with a dropper, and the flow state was visually confirmed.
(With or without retention part)
The state of residence was confirmed visually.

(濃度・温度の測定方法)
紡出口金52の面の3箇所(図3におけるa,b,c)、凝固浴部2aの一端部の液面CU付近(図1におけるd)、糸条走行部2bの他端部の液面CU付近(図1におけるe)の各箇所において凝固液Cをスポイトで5ml採取し、屈折計(京都電子工業株式会社製RA−520)を用いて濃度を測定した。また温度についても同様の箇所を水銀温度計で測定した。
(Measurement method of concentration and temperature)
Three portions (a, b, c in FIG. 3) on the surface of the spout gold 52, the vicinity of the liquid surface CU at one end of the coagulation bath portion 2a (d in FIG. 1), and the liquid at the other end of the yarn running portion 2b 5 ml of the coagulation liquid C was collected with a dropper at each location near the surface CU (e in FIG. 1), and the concentration was measured using a refractometer (RA-520 manufactured by Kyoto Electronics Industry Co., Ltd.). The temperature was also measured with a mercury thermometer.

(繊維断面形状)
内径1mmの塩化ビニル樹脂製のチューブ内に測定用のアクリロニトリル系重合体の繊維を通した後、これをナイフで輪切りにして試料を準備した。ついで、該試料をアクリロニトリル系重合体の繊維断面が上を向くようにしてSEM試料台に接着し、さらにAuを約10nmの厚さにスパッタリングしてから、PHILIPS社製XL20走査型電子顕微鏡により、加速電圧7.00kV、作動距離31mmの条件で繊維断面を観察し、単繊維の繊維断面の長径および短径を測定し、長径/短径の比率を求めた。また変動率(CV値)は長径/短径の測定をn=400で測定し、変動率CVを算出した。
(Fiber cross-sectional shape)
An acrylonitrile polymer fiber for measurement was passed through a tube made of vinyl chloride resin having an inner diameter of 1 mm, and this was cut into a ring with a knife to prepare a sample. Next, the sample was adhered to the SEM sample stage so that the fiber cross section of the acrylonitrile polymer was facing upward, and Au was further sputtered to a thickness of about 10 nm, and then with a XL20 scanning electron microscope manufactured by PHILIPS, The fiber cross section was observed under the conditions of an acceleration voltage of 7.00 kV and a working distance of 31 mm, the major axis and minor axis of the fiber section of the single fiber were measured, and the ratio of major axis / minor axis was determined. The variation rate (CV value) was determined by measuring the major axis / minor axis at n = 400 and calculating the variation rate CV.

(接着糸本数)
単糸間接着の判定は、巻き取った前駆体繊維を約5mmにカットし100mLの水中に分散させ、100rpmで1分間攪拌後、黒色濾紙にて濾過し、単糸繊維の接着個数を測定した。
(Number of adhesive yarns)
For the determination of the adhesion between single yarns, the wound precursor fiber was cut to about 5 mm, dispersed in 100 mL of water, stirred at 100 rpm for 1 minute, filtered through black filter paper, and the number of single yarn fibers adhered was measured. .

(引取り破断倍率)
凝固糸条の引き取り速度を、紡糸原液の吐出線速度の0.45倍とする条件を標準引き取り速度とする。そして紡糸原液の吐出線速度を変えることなく凝固糸条の引き取り速度を上げていき、ノズルの吐出面において凝固糸条が破断したときの凝固糸条の引き取り速度を破断引き取り速度とする。
引取り破断倍率=破断引き取り速度/標準引き取り速度
(Take-off fracture ratio)
The standard take-up speed is a condition in which the take-up speed of the coagulated yarn is 0.45 times the discharge linear speed of the spinning dope. Then, the take-up speed of the coagulated yarn is increased without changing the discharge linear velocity of the spinning dope, and the take-up speed of the coagulated yarn when the coagulated yarn breaks on the discharge surface of the nozzle is set as the break take-up speed.
Take-up breaking ratio = breaking take-up speed / standard take-up speed

[実施例1]
図2における浸漬長(凝固浴部長+糸条走行部長)L1:1100mm、整流板14a,14bに複数備えられる開口部25の開口形状:多孔パンチング孔(図5に示す)、整流板14a,14bの糸条走行部2b内の部分に形成される内槽23の幅W(M3):50mm、凝固液C循環量:2m/h、図1におけるノズル5上端〜液面CUまでの距離L2:20mm、ノズル5下端〜底面CBまでの距離L3:20mmを各諸元とし、評価を行った。
[実施例2]
実施例1の整流板14a,14bに複数備えられる開口部25の開口形状:縦型矩形孔(スリット)とした以外は、実施例1と同様にして評価を行った。
[実施例3]
実施例1の整流板14a,14bの糸条走行部2b内の部分に形成される内槽23の幅W(M3):100mmとした以外は、実施例1と同様にして評価を行った。
[実施例4]
実施例1の浸漬長(凝固浴部長+糸条走行部長)L1:550mmとした以外は、実施例1と同様にして評価を行った。
[比較例1]
従来例として、整流板14a,14bを備えず、ノズル5上端〜液面CUまでの距離L2:80mm、ノズル5下端〜底面CBまでの距離L3:150mmとし、ノズル5の背面側に備えられる凝固液噴出し口から凝固液Cをノズル裏面51へ衝突させるように吐出した以外は、実施例1と同様にして評価を行った。
[Example 1]
In FIG. 2, the immersion length (coagulation bath length + yarn running length) L1: 1100 mm, opening shape of openings 25 provided in a plurality of current plates 14a, 14b: perforated punching holes (shown in FIG. 5), current plates 14a, 14b The width W (M3) of the inner tub 23 formed in the portion of the yarn traveling portion 2b: 50 mm, the circulation amount of the coagulating liquid C: 2 m 3 / h, the distance L2 from the upper end of the nozzle 5 to the liquid level CU in FIG. : 20 mm, and the distance L3 from the lower end of the nozzle 5 to the bottom surface CB: 20 mm.
[Example 2]
Evaluation was performed in the same manner as in Example 1 except that the shape of the opening 25 provided in the rectifying plates 14a and 14b of Example 1 was a vertical rectangular hole (slit).
[Example 3]
Evaluation was performed in the same manner as in Example 1 except that the width W (M3) of the inner tub 23 formed in the portion of the yarn running portion 2b of the rectifying plates 14a and 14b of Example 1 was set to 100 mm.
[Example 4]
Evaluation was performed in the same manner as in Example 1 except that the immersion length (coagulation bath part length + yarn running part length) L1: 550 mm in Example 1 was used.
[Comparative Example 1]
As a conventional example, the rectifying plates 14a and 14b are not provided, the distance L2 from the upper end of the nozzle 5 to the liquid level CU is 80 mm, the distance L3 from the lower end of the nozzle 5 to the bottom surface CB is 150 mm, and the solidification provided on the back side of the nozzle 5 Evaluation was performed in the same manner as in Example 1 except that the coagulating liquid C was discharged from the liquid ejection port so as to collide with the nozzle back surface 51.

Figure 0004856566
Figure 0004856566

Figure 0004856566
Figure 0004856566

表2に示す通り実施例1〜4において凝固液Cは、その流動状況を図2の矢印に示すように紡浴槽2内を上流側から下流側へと向かって凝固糸条13の進行方向へと流されていき、前記進行方向と逆流したり滞留したりすることなく、糸条走行部2b内の整流板14a,14bの部分の複数の開口部25を介して内槽23からその両側の外槽24へとスムースに略均等に流され、紡浴槽2の他端部に備えられる紡浴槽出口15から凝固液回収部3へと略均等に流出されることがわかった。すなわち前記凝固液Cの流れは、紡浴槽2の上流側から下流側へと向かって全体に亘り均一に整流された対流となることを確認出来た。又紡浴槽2内に貯留される前記凝固液Cは、装置の外部から供給される凝固液Cの濃度・温度の設定に対しても紡浴槽2内のa〜eの各箇所における濃度・温度の測定値に大きな差を生じさせず、又その結果得られる製品繊維の断面形状斑(CV値)は数値が低くなり、接着糸本数も減少することがわかった。そして引き取り破断倍率も向上し、更なる生産性向上が可能であることがわかった。
又紡出口金52の吐出面(ノズル5吐出面)より破断し単糸切れした糸屑(ネスト)も、上記のように整流された凝固液流によって一定方向へと流され、紡浴槽出口15から凝固液回収部3へと流出されることが確認された。その結果前記紡浴槽2内に糸屑(ネスト)が浮遊したりすることによる繊維への接着等が無くなり、紡糸の品質の安定性が大きく向上されることがわかった。
As shown in Table 2, in Examples 1 to 4, the coagulating liquid C in the traveling directions of the coagulated yarn 13 in the spinning bath 2 from the upstream side to the downstream side as shown by the arrows in FIG. Without flowing backward or staying in the direction of travel, the inner tub 23 is disposed on both sides of the rectifying plates 14a and 14b in the yarn traveling portion 2b via the plurality of openings 25. It was found that the water flowed smoothly and evenly into the outer tub 24 and flowed out almost uniformly from the spinning bath outlet 15 provided at the other end of the spinning bath 2 to the coagulation liquid recovery unit 3. In other words, it was confirmed that the flow of the coagulating liquid C became a convection uniformly rectified over the whole from the upstream side to the downstream side of the spinning bath 2. Further, the coagulating liquid C stored in the spinning tub 2 has a concentration / temperature at each position a to e in the spinning tub 2 with respect to the setting of the concentration / temperature of the coagulating liquid C supplied from the outside of the apparatus. As a result, it was found that the cross-sectional shape unevenness (CV value) of the product fiber obtained was low and the number of adhesive yarns was reduced. It was also found that the take-up breakage ratio was improved and further productivity improvement was possible.
Further, the yarn waste (nest) which is broken from the discharge surface (nozzle 5 discharge surface) of the spinning nozzle 52 and is broken by a single yarn is also caused to flow in a certain direction by the coagulated liquid flow rectified as described above, and the spinning bath outlet 15 From this, it was confirmed that the liquid was discharged to the coagulation liquid recovery unit 3. As a result, it was found that there is no adhesion to the fiber due to floating of yarn waste (nest) in the spinning bath 2, and the stability of spinning quality is greatly improved.

一方従来の紡浴槽で紡糸した比較例1においては、図7の矢印に示すように凝固液は走行する凝固糸条から離れた位置で該凝固糸条の走行方向と逆向きの対流(逆流)を起こしたり滞留を起こしたりして、全体的な凝固液の乱流が発生させられた。その結果、わずか数時間の紡糸評価にも関わらず紡浴槽の滞留部に糸屑(ネスト)が浮遊し、また凝固液抵抗の影響を受け引き取り破断倍率も前記実施例1〜4と比較し低い値となった。
又紡出口金の吐出面(ノズル吐出面)付近の濃度・温度も供給される凝固液濃度・温度に対し高く、紡浴槽内の濃度・温度斑も大きくなり、結果得られる繊維の断面形状斑(CV値)も高くなり接着糸本数も数多く確認された。
On the other hand, in Comparative Example 1 spun in a conventional spinning tub, the coagulating liquid is convected in the direction opposite to the traveling direction of the coagulated yarn (reverse flow) at a position away from the traveling coagulated yarn as shown by the arrow in FIG. As a result, turbulence of the entire coagulating liquid was generated. As a result, the yarn waste (nesting) floats in the staying portion of the spinning tub in spite of the spinning evaluation of only a few hours, and the take-up breakage factor is lower than in Examples 1 to 4 due to the influence of the coagulation liquid resistance. Value.
Also, the concentration and temperature near the discharge surface (nozzle discharge surface) of the spinning outlet are higher than the supplied coagulating liquid concentration and temperature, and the concentration and temperature spots in the spinning bath also increase, resulting in uneven cross-sectional shape of the resulting fiber. (CV value) also increased, and many adhesive yarns were confirmed.

本発明の一実施形態の湿式紡糸装置の概略構成を示す側面図である。It is a side view showing a schematic structure of a wet spinning device of one embodiment of the present invention. 本発明の一実施形態の湿式紡糸装置の概略構成を示す平面図である。It is a top view which shows schematic structure of the wet spinning apparatus of one Embodiment of this invention. 図2に示すX−X線断面図である。FIG. 3 is a sectional view taken along line XX shown in FIG. 2. 図2に示すY−Y線断面図である。It is the YY sectional view taken on the line shown in FIG. 整流板の開口部形状の一例を示す図である。It is a figure which shows an example of the opening part shape of a baffle plate. 紡浴槽出口の出口孔形状を示す図である。It is a figure which shows the exit hole shape of a spinning tub exit. 従来の湿式紡糸装置(比較例1)の凝固液の対流を示す平面図である。It is a top view which shows the convection of the coagulating liquid of the conventional wet spinning apparatus (comparative example 1).

符号の説明Explanation of symbols

1 本発明の一実施形態における湿式紡糸装置
2 紡浴槽
2a 凝固浴部
2b 糸条走行部
3 凝固液回収部
4a,4b 凝固液噴出し口
5 ノズル
10 引き上げロール
13 凝固糸条
14a,14b 整流板
23 内槽
24 外槽
25 開口部
30 凝固糸条巻き回し面
51 ノズル裏面
52 紡出口金
C 凝固液
C1 中心軸
CB 底面
CU 液面
L2 ノズル上端から液面までの距離
L3 ノズル下端から底面までの距離
DESCRIPTION OF SYMBOLS 1 Wet spinning apparatus in one Embodiment of this invention 2 Spinning tub 2a Coagulation bath part 2b Thread running part 3 Coagulated liquid collection | recovery part 4a, 4b Coagulated liquid ejection port 5 Nozzle 10 Pull-up roll 13 Coagulated yarn 14a, 14b Current plate 23 Inner tank 24 Outer tank 25 Opening 30 Coagulated yarn winding surface 51 Nozzle back surface 52 Spout gold C Coagulated liquid C1 Central axis CB Bottom surface CU Liquid surface L2 Distance from nozzle top to liquid surface L3 Nozzle bottom to bottom distance

Claims (2)

紡糸原液を凝固させ凝固糸条にして紡糸する湿式紡糸装置において、
凝固液を貯留する紡浴槽の一端部に、紡糸原液を前記紡浴槽の他端部に向けて吐出するノズルと、前記ノズルの背面側から前記凝固液を吐出する凝固液噴出し口とが、前記凝固液噴出し口から吐出される前記凝固液が前記ノズルの背面に衝突しないよう配設されており、
前記紡浴槽の他端部に、凝固糸条を巻き回して該紡浴槽から引き上げるための引き上げロールが設けられ、
前記引き上げロールよりも後方側に、前記凝固液が流出させられる凝固液回収部が設けられ、
前記紡浴槽の内部が、ノズルから吐出される紡糸原液を凝固させ凝固糸条にする凝固浴部と、前記凝固糸条が走行させられる糸条走行部とに区画されるとともに、その一端部から他端部へと伸びる二つの整流板により、前記凝固糸条が走行する内槽と、その両側の外槽とに分けられ、
前記両整流板は、その前記凝固浴部に形成される部分の側面に開口部を有さず、その前記糸条走行部に形成される部分の側面に開口部を有し、
前記ノズルの吐出面の中心と前記引き上げロールの凝固糸条巻き回し面とが前記紡浴槽の液深の上下方向の中心位置になるよう配設され、
前記ノズルの上端から前記紡浴槽の液面までの距離と、前記ノズルの下端から前記紡浴槽の底面までの距離とが、夫々10mm以上40mm以下となるように構成されることを特徴とする湿式紡糸装置。
In a wet spinning apparatus that coagulates a spinning dope and spins it into a coagulated yarn,
A nozzle that discharges the spinning solution toward the other end of the spinning tub at one end of the spinning tub that stores the coagulating liquid, and a coagulating liquid ejection port that discharges the coagulating liquid from the back side of the nozzle. The coagulating liquid discharged from the coagulating liquid ejection port is disposed so as not to collide with the back surface of the nozzle,
The other end of the spinning tub is provided with a pulling roll for winding the coagulated yarn and pulling it up from the spinning tub,
A coagulation liquid recovery part from which the coagulation liquid is allowed to flow out is provided behind the pulling roll,
The inside of the spinning tub is divided into a coagulation bath part that coagulates the spinning dope discharged from the nozzle to make a coagulated yarn, and a yarn running part that runs the coagulated yarn, and from one end thereof By two baffle plates extending to the other end, it is divided into an inner tub in which the coagulated yarn travels, and an outer tub on both sides thereof,
The both rectifying plates do not have an opening on the side surface of the part formed in the coagulation bath part, and have an opening on the side surface of the part formed on the yarn traveling part,
The center of the discharge surface of the nozzle and the coagulated yarn winding surface of the pulling roll are disposed so as to be the center position in the vertical direction of the liquid depth of the spinning tub,
The wet type characterized in that the distance from the upper end of the nozzle to the liquid level of the spinning tub and the distance from the lower end of the nozzle to the bottom surface of the spinning tub are 10 mm or more and 40 mm or less, respectively. Spinning device.
請求項1に記載の湿式紡糸装置を用いて合成繊維を紡糸する方法であって、
前記凝固液噴出し口から吐出される前記凝固液を、前記凝固糸条の走行方向と略平行に1m3/h〜3m3/hで吐出させ、前記凝固液回収部へ流出させ装置から排出させることを特徴とする湿式紡糸方法。

A method for spinning synthetic fibers using the wet spinning device according to claim 1,
Discharging the coagulation liquid discharged from the coagulation liquid blowing mouth, from the substantially the running direction of the coagulated yarn parallel ejected in 1m 3 / h~3m 3 / h, drained into the coagulating liquid recovery section apparatus A wet spinning method characterized in that

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JP3483070B2 (en) * 1995-08-30 2004-01-06 日本エクスラン工業株式会社 Wet spinning device
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CN103774253B (en) * 2012-10-26 2016-09-28 中国石油化工集团公司 A kind of wet spinning shaped device

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