JP2006336152A - Dry-wet spinning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus capable of producing a fiber having stabilized performances free from dispersion of quality while raising productivity in dry and wet type spinning. <P>SOLUTION: The dry-wet spinning apparatus comprises a coagulating bath 2a, a spinneret 1 in which many spinning hole groups arranged at a fixed air gap G from a liquid level S in which a coagulating liquid L packed in the coagulating bath 2a is formed are bored, a flow pipe 3 installed in a state immersed in the coagulating liquid L and a take-off means 4 of yarn installed below the flow pipe 3. In the dry-wet spinning apparatus, the flow pipe 3 has a funnel-shaped bent pipe part 3a formed in a state spreading toward the upstream side in which the coagulating liquid L flows and a cylindrical straight pipe part 3b provided in the lower part of the bent pipe part 3a and the flow pipe 3 is equipped with a flow rate regulator 5 for feeding the coagulating liquid from all round directions without reducing inside diameter of pipe of the straight pipe part 3b in succession to the straight pipe part 3b and controls flow rate and flow amount of the coagulating liquid which flows down through the flow pipe 3 by a coagulating liquid fed from the flow rate regulator 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a dry-wet spinning apparatus in which a spinning dope is once spun into air from a spinneret having a large number of spinning holes, and then the spun dope is introduced into a coagulation bath to be fiberized.

  As a conventional technique for spinning wholly aromatic polyamide fibers having both high strength and high modulus, a dope containing a wholly aromatic polyamide polymer is once spun into the air from a spinneret and the spun dope stream is solidified. It is well known that it is introduced into a liquid and solidified to form a fiber.

  However, when the spinning dope is introduced into the stationary coagulating liquid as it is, it receives a large passage resistance from the coagulating liquid and causes a single fiber breakage when the spinning dope exceeds a certain speed. For this reason, the spinning speed of the spinning dope could not be increased, and the spinning speed had to be lowered. In particular, there is a problem that as the fineness of the fiber to be manufactured becomes thinner, it becomes more difficult to perform stable spinning so that no single fiber breakage occurs.

  Therefore, as a method for solving this problem, in order to reduce the resistance received from the coagulation liquid by causing the coagulation liquid to flow together with the dope to be spun, a technique of introducing the spinning dope into the flow tube through which the coagulation liquid flows and spinning Is proposed in, for example, Japanese Patent Laid-Open No. 60-52610. Certainly, according to this prior art, the flow velocity of the coagulating liquid flowing in the flow tube can be increased, but it is difficult to match the velocity of the fiber traveling in the flow tube with the flow velocity of the coagulating liquid flowing in the flow tube. Therefore, even if this conventional technique is used, the occurrence of single fiber breakage has not been sufficiently suppressed.

  Japanese Patent Application Laid-Open No. 56-128312 discloses that a dope once spun into air from a spinneret is introduced into a flow tube, and in the initial stage, a coagulating liquid is fed into the flow tube from a plurality of small diameter nozzles or slits. A dry-wet spinning method has been proposed in which a dope to be fiberized is spun in a flow tube and spun in the running direction. Certainly, by adopting such a dry-wet spinning method, it is possible to accelerate the flow rate of the dope that is fiberized with the help of the coagulation liquid flow that is accelerated and introduced into the flow tube in the initial stage. This makes it possible to perform high speed spinning while reducing the resistance acting on the yarn.

  However, in this prior art, since it is necessary to flow the coagulation liquid as a forced propulsion flow along the dope spun in the initial stage, an abrupt speed change is given to the unsolidified dope. If it does so, the problem that a single fiber piece will generate | occur | produce by the change of the liquid resistance by the speed change will arise.

  In addition, this conventional technique has a problem that the flow of coagulation liquid introduced from the coagulation bath to the upper part of the flow tube is disturbed, and when the coagulation liquid flow is disturbed, the liquid level of the coagulation bath is also disturbed thereby. End up. In this way, when the flow rate of the coagulation liquid flow rate changes suddenly and the liquid level of the coagulation bath is disturbed, the resulting fiber quality varies greatly, and single fiber breakage is likely to occur at the inlet to the flow tube. Problems arise. In particular, as the single fiber fineness becomes thinner, the problem of single fiber breakage becomes more prominent.

  In order to solve this problem, in Japanese Patent Application Laid-Open No. 57-106707, the flow rate (speed) of the coagulating liquid flowing in the flow tube is adjusted by providing a throttle in the flow tube and adjusting the area of the throttle. A method has been proposed. Certainly, when this conventional technique is adopted, it is easy to create conditions in which the coagulation bath is less likely to be disturbed and the liquid level is less likely to be disturbed.

  However, if there is a constriction part in the middle of the flow tube, the flow rate of the coagulation liquid suddenly changes in the constriction part, a flow rate difference occurs in the flow tube, the fibers in the middle of solidification are stretched, and the physical properties decrease, A single fiber breakage may occur. Furthermore, when the fiber passes through the drawn portion, the fiber is damaged because it contacts the wall surface of the drawn portion.

JP 60-52610 A JP-A-56-128312 JP-A-57-106707

  In view of the above-described problems of the prior art, the object of the present invention is to “spin the spinning dope into the air from the spinneret having a large number of spinning holes and store the coagulating liquid. In dry-wet spinning that guides the dope into fibers, we provide a device that can produce a single fiber that forms a yarn and a fiber that has stable performance without variations in quality between single fiber groups while increasing productivity. To do.

Here, as the present invention for solving the above problems,
(1) A coagulation bath filled with a coagulation liquid, and a spinneret having a plurality of spinning hole groups provided with a certain air gap from the liquid surface formed by the coagulation liquid filled in the coagulation bath And a wet and wet spinning apparatus comprising a flow tube immersed in the coagulation liquid and a yarn take-up means provided below the flow tube, wherein the flow tube has a solidified upper inner wall surface. It has a funnel-shaped curved pipe portion formed so as to widen toward the upstream side into which the liquid flows, and its lower inner wall surface has a cylindrical straight pipe portion, and the straight pipe portion following the straight pipe portion. A flow rate regulator for supplying the coagulating liquid from all around without reducing the inner diameter of the pipe, and controlling the flow rate and flow rate of the coagulating liquid flowing down in the flow tube by the coagulating liquid supplied from the flow rate regulator. Dry-wet spinning equipment,
(2) The dry and wet spinning device according to (1), wherein the curved pipe portion and the straight pipe portion of the flow pipe are gently connected without causing a step.
(3) The flow rate regulator includes a liquid storage part and a liquid injection part for injecting and supplying the coagulating liquid from the liquid storage part into the flow tube, and the liquid injection part equalizes the coagulated liquid supplied to the liquid storage part. The dry-wet spinning apparatus according to (1), which also serves as a pressure equalizing member to be compressed and / or a rectifying member that injects the rectified coagulating liquid into the coagulating liquid flowing down the flow tube,
(4) The dry and wet spinning device according to (3), wherein the liquid injection portion inner diameter of the flow rate regulator is formed in a conical shape spreading toward the downstream side,
(5) The dry and wet spinning apparatus according to (1), wherein the distance from the liquid level to the upper end of the flow tube is 2 to 100 mm,
(6) The dry and wet spinning device according to (1), wherein the inner diameter of the straight pipe portion of the flow pipe is 2 to 30 mm, and
(7) The dry / wet spinning apparatus according to (1), wherein a fiber take-up speed obtained by the above method is 10 to 300 m / min.

  As described above, according to the dry and wet spinning method and apparatus of the present invention, a desired amount of coagulating liquid can be smoothly supplied without disturbing the coagulating liquid flow flowing down the flow pipe, The flow rate and flow rate of the flowing coagulating liquid can be controlled very well. In addition, in the present invention, in order to control the flow rate and flow velocity of the coagulating liquid flowing down in the flow tube, the throttle section is not provided as in the prior art, so that the flow passage cross-sectional area of the coagulating liquid passing therethrough changes suddenly. In addition, the speed difference of the coagulation liquid does not occur in the flow tube. In addition, since the coagulating liquid is not forcibly ejected directly into the flow tube by the nozzle, the flow rate of the coagulating liquid does not change abruptly in the flow tube.

  Therefore, the dope discharged from the spinneret can reduce the change in the flow rate of the coagulating liquid flowing in the flow tube in the process of fiberizing with the coagulating bath liquid. For this reason, the dope spun in the flow tube can be made into fiber while stably suppressing the occurrence of single fiber breakage as much as possible, and the yarn obtained by making into fiber is stable with little variation in quality. There is an extremely remarkable effect of having quality.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram schematically illustrating one embodiment of a dry / wet spinning apparatus according to the present invention. In FIG. 1, D represents a dope containing a polymer made of wholly aromatic polyamide, and Y represents a yarn obtained by extracting a solvent from such a dope and fiberized. Reference numeral 1 denotes a spinneret having a large number of spinning holes, 2 denotes a coagulating device, 3 denotes a flow tube, and 4 denotes a rotating body for taking up the yarn. The coagulation apparatus 2 includes a coagulation bath 2a, a coagulation liquid supply pipe 2b, a coagulation liquid discharge pipe 2c, a coagulation liquid recovery means 2d, and a weir 2e. Symbol S represents the liquid level formed in the coagulation bath 2a by the coagulation liquid L, respectively.

  In the embodiment of the dry / wet spinning apparatus according to the present invention configured as described above, the coagulation liquid L is supplied from the supply pipe 2b of the coagulation liquid L to the coagulation bath 2a while being controlled at a constant flow rate. Next, the coagulating liquid L supplied to the coagulation bath 2a in this way overflows and flows out from the weir 2e provided in the coagulation bath 2a. In this way, the weir 2e serves to maintain the level of the liquid surface S of the coagulating liquid stored in the coagulating bath 2a at a constant level. The excessive coagulating liquid L overflowed is recovered by the recovery means 2d and discharged from the discharge pipe 2c connected to the recovery means 2d.

  On the other hand, the coagulation liquid L supplied to the coagulation bath 2 a flows into the flow tube 3 provided below the level of the liquid surface S of the coagulation liquid, and flows along with the dope D spun from the spinneret 1. Flow down in 3. The flow tube 3 is composed of a bent tube portion 3a having an upper funnel shape and a straight tube portion 3b having a lower tubular shape. At this time, the straight pipe portion 3b of the flow tube 3 is provided with a flow rate adjuster 5 for adjusting the flow rate and flow rate of the coagulating liquid L flowing down the flow tube 3 as shown in the figure. Here, the present invention is characterized by having the flow rate regulator 5, and the flow rate regulator 5 will be described in detail below.

  The flow rate regulator 5 of the present invention described above includes a supply pipe 5a for supplying the coagulating liquid L, a liquid storage part 5b for storing the supplied coagulating liquid L, and the stored coagulating liquid in the flow tube 3. It is at least comprised from the liquid injection | pouring part 5c injected and supplied in the straight pipe | tube part 3b. Therefore, the coagulating liquid L supplied from the upper curved pipe part 3a through the coagulation bath 2a and the coagulating liquid L supplied to the liquid injection part 5c through the liquid storage part 5b are injected into the flow tube 3. Is done.

  As described above, in this example, the coagulating liquid L flowing down in the flow pipe 3 is resisted against the coagulating liquid flowing down by injecting the coagulating liquid L supplied from the flow rate regulator 5 from the liquid injection unit 5c. Can be given. Therefore, the flow rate and flow rate of the coagulating liquid flowing down in the straight pipe portion 3b can be adjusted to desired values by the flow rate of the coagulating liquid L from the flow rate adjuster 5.

  In the present invention, as described above, the flow velocity and flow rate of the coagulating liquid L flowing down in the flow tube 3 can be adjusted to desired values. For this reason, the spinning speed of the dope D can be controlled to a desired value by running the spinning stock solution (spun dope D) spun from the spinneret 1 together with the coagulating liquid L flowing in the flow tube 3.

  In order to fiberize the adjusted dope D, first, a metering means such as a gear pump is used to distribute and supply the dope to the spin block (not shown) while continuously metering the dope supply amount. Spinning as a dope D from the spinneret 1 provided. However, with respect to the embodiment of the spinneret 1, for example, 1000 spinning hole groups having a hole diameter of 0.5 mm are drilled in a disk having an outer diameter of 100 mm, and the dope D is produced from these many spinning hole groups. Can be mentioned.

  In the present invention, the dope D spun from the spinneret 1 as described above is air formed between the dope discharge surface of the spinneret 1 and the liquid surface S of the coagulating liquid, as illustrated in FIG. Once spun into the gap G, it is then introduced into the coagulation liquid L.

  If the air gap G is too small, the coagulation liquid L may come into contact with the dope discharge surface of the spinneret 1, and the dope D discharged from the spinneret 1 is solidified immediately below the spinneret 1. Therefore, it is not preferable because a single fiber breakage occurs. On the other hand, if the size is too large, adjacent yarns spun from the spinning hole group are brought into close contact with each other, and an independent single fiber group cannot be obtained. For this reason, the air gap G is suitably 1 mm or more and 50 mm or less in the spinneret 1, for example.

  As described above, the dope D discharged from the numerous spinning holes drilled in the spinneret 1 is once spun into the air and then introduced into the coagulation liquid L filled in the coagulation bath 2a. Then, it is introduced into the curved pipe portion 3a of the flow pipe 3.

  Here, if the distance from the liquid level S of the coagulation bath 2a to the upper end of the flow tube 3 is small, the flow of the coagulated liquid L flowing into the upper curved pipe portion 3a of the flow tube 3 is disturbed, and this is caused by the liquid surface S. And the liquid level S is disturbed. On the other hand, when this distance is increased, the effect of increasing the speed until the speed of the coagulating liquid L in the vicinity of the liquid surface S due to the installation of the flow tube 3 reaches a predetermined speed is lost. ) And the flow velocity difference between the coagulating liquid L and the single fiber breakage occurs. Therefore, in order to stabilize the liquid surface S of the coagulation bath 2a and suppress the occurrence of single fiber breakage, the distance from the liquid surface S to the upper end of the flow tube 3 is a length of 2 mm or more and 100 mm or less, preferably It is necessary to make it 5 mm or more and 50 mm or less.

  At this time, although not shown in FIG. 1, a rectifying member for rectifying the flow of the coagulating liquid L is installed in the coagulating bath 2a to form a stable flow so that the flow of the coagulating liquid L is not disturbed. Is a preferred embodiment in the present invention. Here, examples of such a preferable rectifying member include a screen excellent in the passage of the coagulating liquid L such as a perforated plate, a honeycomb plate, and a woven or knitted fabric. In addition, regarding the installation position of these rectification members, it is desirable to provide especially in the vicinity of the introduction part of the coagulating liquid L which flows into the flow tube 3.

  Next, the preferable shape of the flow tube 3 used in the present invention will be described. The shape is the amount of the solidified liquid L brought into the flow tube 3 by the dope D discharged from the spinneret 1 and the flow of the dope D itself. It is determined by various conditions such as the amount of inflow into the pipe 3 or the take-up speed of the fiberized yarn Y. For this reason, ultimately, it is necessary to determine an optimum shape by performing experiments so as to meet these conditions. However, in order to smooth the speed increase of the coagulating liquid L in the flow tube 3, the curved pipe portion 3a above the flow tube 3 has a gently divergent shape toward the upstream side where the coagulating liquid L flows down. It must be a curved surface.

  At this time, as a process in which the dope D is solidified in the flow tube 3 to be fiberized, the dope D spun with the coagulation liquid L existing in the coagulation bath 2a, the curved pipe portion 3a and the straight pipe portion 3b of the flow tube. And the organic solvent contained in the dope D is extracted into the coagulation liquid L to form a yarn Y composed of a number of single fiber groups (multifilaments) made of, for example, a para-type wholly aromatic polyamide polymer. It is well known to do.

  Next, as illustrated in FIG. 1, the yarn Y formed in this way is taken up by a rotating body 4 such as a take-up roller, and a water washing step and a water washing step for removing the coagulating liquid L attached to the yarn Y. A series of yarn-making processes including a drying step of drying the moisture adhering to the above and a step of hot-drawing the yarn subjected to dry and wet spinning are performed. It is also well known that a fiber having high performance and / or high function is finally obtained by this series of yarn forming processes.

  In the dry-wet spinning process in the series of yarn forming processes as described above, the present invention is characterized by a mechanism capable of adjusting the flow rate of the coagulating liquid L in the flow tube 3 as described above. Is required. Therefore, the flow rate regulator 5 of the present invention will be described in more detail below with reference to FIG.

  In the flow rate adjuster 5, in order not to change the flow rate and flow rate of the coagulating liquid L flowing in the flow tube 3 abruptly, a connection portion at the upper part of the flow tube 3 and the flow rate adjuster 5 is a sudden portion such as a throttle portion. It is desirable that there is no change in diameter, and it is preferable that the connection is made so that no change in diameter occurs.

  At that time, a part of the straight pipe portion 3b of the flow pipe 3 is surrounded inside the flow rate adjuster 5, and a rectifying member or pressure equalization capable of stably supplying the coagulating liquid L from the entire circumferential direction thereof. It is preferable to install each member and supply the coagulating liquid L flowing in the straight pipe portion 3b without greatly disturbing. In the example shown in FIGS. 1 and 2, the member constituting the liquid injection part 5c itself is made of a porous sintered metal so as to function as a rectifying member and / or a pressure equalizing member.

  As another example of the member constituting the liquid injection portion 5c, it is preferable to form a stable flow so that the flow of the coagulating liquid L is not disturbed. Therefore, the rectifying member and / or the pressure equalizing member As a preferable example, a filtration medium such as a porous plate such as a porous sintered metal, a screen having excellent fluid passage properties such as a honeycomb plate and a woven or knitted fabric can be used.

  Furthermore, in order to supply the coagulation liquid L stably and uniformly from the liquid injection part 5c, the passage resistance of the coagulation liquid L is required to some extent. For example, when a woven or knitted fabric made of fine metal wires is used as a material, one or a plurality of woven or knitted fabrics having a mesh size of 20 to 2000 mesh may be used. Of course, in the present invention, it is needless to say that the present invention is not limited to the woven or knitted fabric, and any similar effect can be obtained.

  Here, the shape of the liquid injecting portion 5c is such that the solidified liquid L flowing down the flow tube 3 is gently connected to the straight tube portion 3b of the flow tube 3 without causing a diameter change or a step so as not to be disturbed as much as possible. Needless to say, it is good to have no sudden shape change. Furthermore, it is preferable that the inner diameter of the coagulating liquid L flowing down the liquid injecting portion 5c is constant without expanding the inner diameter of the coagulating liquid L.

  The flow rate regulator 5 described above is provided connected to the lower portion of the straight pipe portion 3b of the flow tube 3, and here, the coagulating liquid L is smoothly injected and supplied to the straight pipe portion 3b of the flow pipe 3. . Therefore, the coagulation liquid L flowing down from the coagulation bath 2a to the flow rate regulator 5 through the flow pipe 3 does not cause a rapid change in speed. In addition, the flow rate and flow rate of the coagulating liquid L flowing in the flow tube 3 can be arbitrarily adjusted by changing the flow rate of the coagulating liquid L supplied from the flow rate regulator 5.

  At this time, the flow rate of the coagulation liquid L supplied from the supply pipe 2b to the coagulation bath 2a and the flow rate of the coagulation liquid L supplied from the flow rate regulator 5 are matters to be appropriately selected according to the yarn production conditions. However, it goes without saying that the liquid level S of the coagulation bath 2a is not disturbed, and that the flow velocity flowing in the flow tube 3 is preferably close to the speed at which the dope D and yarn Y travel in the flow tube 3. Therefore, for example, when the take-up speed of the yarn Y by the take-up means 4 is 70 to 100 m / min, the amount of the coagulating liquid L supplied from the supply pipe 2b of the coagulation bath 2a is 2 to 10 l / min ( Liter / minute), and the amount of the coagulating liquid L supplied from the coagulating liquid supply pipe 5a of the flow rate regulator 5 is preferably 3 to 5 l / min (liter / min).

  At that time, the pipe inner diameter of the straight pipe portion 3b is preferably 2 mm or more and 30 mm or less. This is because, in order to efficiently produce the yarn Y, 10 to 5000 fibers are required as the number of single fiber groups (multifilaments) constituting the yarn Y, and this point is taken into consideration. This is because the equivalent diameter of the yarn is 1 mm or more and 20 mm or less. Therefore, in order to allow the dope D or the fiberized yarn Y traveling in the flow tube 3 to travel with sufficient margin so as not to be damaged due to excessive contact with the flow tube wall, the lower portion of the flow tube 3 is used. The cylindrical inner diameter d of the straight pipe portion 3b is preferably 2 mm or more and 30 mm or less.

  The cylindrical length L of the lower straight pipe portion 3b of the flow tube 3 is preferably 100 mm or more and 5000 mm or less, although it depends on the spinning conditions such as the spinning speed. This is because, on the other hand, in order to make the dope D spun from the spinneret 1 into a fiber, the time required for solidification is required, so the length of the flow tube 3 increases the time required for this solidification. This is because it is necessary to have a length that can be used.

  However, on the other hand, when the length of the straight pipe portion 3b at the lower part of the flow tube 3 is increased, the inner wall surface of the flow tube and the running dope D or yarn Y come into contact with each other, and excessive frictional resistance acts. In this case, the dope D or the yarn Y is strongly abraded to cause a single fiber breakage or a thread breakage. Therefore, when these conditions are satisfied, the length L of the straight pipe portion 3b is preferably 100 mm or more and 5000 mm or less.

  Next, the dry / wet spinning device of the present invention can be used as a spinning device for polyacrylonitrile or the like. Preferably, a dope D containing a polymer made of wholly aromatic polyamide is made into a fiber to form a yarn Y. It is preferable to use it in the process.

  For example, in this embodiment, first, as “dope”, N-methyl-2-pyrrolidone (hereinafter referred to as NMP) having a moisture content of 100 ppm or less 112.9 parts, paraphenylenediamine 1.506 parts, 3,4′-diamino 2.789 parts of diphenyl ether are put in a reaction vessel at room temperature, dissolved in nitrogen, and 5.658 parts of terephthalic acid chloride is added with stirring. And finally, it is made to react at 85 degreeC for 60 minutes, and a transparent viscous polymer solution is obtained. Next, 9.174 parts of NMP slurry containing 22.5% by weight of calcium hydroxide is added and a neutralization reaction is performed to obtain the necessary “dope”.

It is the schematic block diagram which illustrated typically one Embodiment of the dry-wet spinning apparatus which concerns on this invention. It is the expanded sectional view which expanded and displayed the principal part (flow pipe part) of this invention typically.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spinneret 2 Coagulation apparatus 2a Coagulation bath 2b Coagulation liquid supply pipe 2c Coagulation liquid discharge pipe 2d Coagulation liquid recovery means 2e Weir 3 Flow pipe 3a Flow pipe curved pipe section 3b Flow pipe straight pipe section 4 Take-up means 5 Flow rate regulator 5b Coagulating liquid storage section 5a Coagulating liquid supply pipe 5c Liquid injection section D Dope G Air gap L Coagulating liquid S Coagulating bath liquid surface Y Yarn

Claims (7)

A coagulation bath filled with a coagulation liquid, a spinneret in which a plurality of spinning hole groups provided with a constant air gap and a liquid surface formed by the coagulation liquid filled in the coagulation bath are formed; In a dry-wet spinning apparatus including a flow tube immersed in a coagulation liquid and a yarn take-up means provided below the flow tube,
The flow tube has a funnel-shaped curved pipe portion whose upper inner wall surface is formed to expand toward the upstream side where the coagulating liquid flows, and a lower inner wall surface thereof has a cylindrical straight pipe portion, A flow rate regulator that supplies a coagulating liquid from the entire circumference without reducing the pipe inner diameter of the straight pipe part following the straight pipe part, and a coagulation that flows down in the flow pipe by the coagulating liquid supplied from the flow rate regulator A dry-wet spinning apparatus characterized by controlling the flow rate and flow rate of a liquid.   The dry-wet spinning apparatus according to claim 1, wherein the bent pipe portion and the straight pipe portion of the flow pipe are smoothly connected without causing a step.   The flow rate regulator includes a liquid storage unit and a liquid injection unit that injects and supplies the coagulating liquid from the liquid storage unit into the flow tube, and the liquid injection unit equalizes the coagulated liquid supplied to the liquid storage unit. The dry-wet spinning apparatus according to claim 1, which also serves as a pressure equalizing member and / or a rectifying member for injecting the rectified coagulating liquid into the coagulating liquid flowing down the flow tube.   The dry / wet spinning apparatus according to claim 3, wherein an inner diameter of the liquid injection portion of the flow rate regulator is formed in a conical shape so as to widen toward the downstream side.   The dry-wet spinning apparatus according to claim 1, wherein a distance from the liquid level to the upper end of the flow tube is 2 to 100 mm.   The dry-wet spinning apparatus according to claim 1, wherein the straight pipe portion of the flow pipe has an inner diameter of 2 to 30 mm.   The dry-wet spinning apparatus according to claim 1, wherein a take-up speed of the fiber obtained by the method is 10 to 300 m / min.

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