KR100903075B1 - Precipitating bath - Google Patents

Abstract

A precipitating bath (4) for holding a coagulation liquid for the precipitation of shaped bodies formed from a spinning solution has a bottom and at least one precipitating bath discharge nozzle (10) mounted in the bottom, the at least one discharge nozzle having an intake port and opposite it a discharge port for the passage therethrough of the shaped bodies formed from the spinning solution, the bath also having at least one inlet for the coagulation liquid (4) and at least one outlet for the coagulation liquid. The precipitating bath (4) is characterised in that it has a cover sheet (6) with at least one hole for holding the at least one precipitating bath discharge nozzle (10), the cover sheet (6) being positioned above the at least one inlet for the coagulation liquid and beneath at least one outlet for the coagulation liquid, and in that the at least one precipitating bath discharge nozzle (10) in the at least one hole in the cover sheet is arranged such that one or more orifices are formed in the cover sheet (6) in a ring around the at least one precipitating bath discharge nozzle (10). A process for the preparation of cellulosic shaped bodies is provided in which process an extruded solution of cellulose in a tertiary amine N-oxide and, optionally, water is introduced into a coagulation liquid, for example in such a precipitating bath, for coagulation, wherein during the precipitation the coagulation liquid flows in countercurrent to the direction of movement of the shaped solution, at least in the region of the inlet of the shaped solution into the coagulation liquid.

Description

Precipitating bath

The present invention relates to a coagulation bath containing a coagulating solution for coagulating a molded article formed of a spinning solution. The coagulation bath has a bottom surface with at least one coagulation bath discharge nozzle installed, the at least one coagulation bath discharge nozzle has an inlet through which molding formed from the spinning bath passes and an outlet on the opposite side, and at least one coagulation bath. Has a coagulant inlet and a coagulant outlet. Moreover, the present invention also relates to a method for producing a cellulose molding, which method is formed in a hot state of a cellulose solution in a mixture of tertiary amine N-oxide and water, and the molded solution is formed in a pre-partitioned gas zone ( Air extruded into the gas medium and the extruded solution is introduced into the coagulating liquid.

Such coagulation baths and methods for producing cellulose moldings have been disclosed, for example, in JP-A-61-19805. In this document a device for high speed wet spinning has been disclosed and according to this document the spinning liquid is spun from the nozzle into the spinning funnel. Inside the funnel, the spinning liquid was allowed to solidify into the molding in contact with the spinning fluid circulating along the walls of the spinning funnel. Inside the funnel, an increase in the rate of spinning occurs. As a result, disturbances occur at the point where the spinning liquid collides with the coagulant. Since such disturbances result in spinning defects, the coagulation bath and molding method described in JP-A-61-19805 described above can be stably used only in some cellulose spinning solutions. In addition, in JP-A-61-19805 mentioned above, the winding speed is described as 1500 m / min. However, these results are obtained only by using a large number of complex and expensive acceleration funnels. As a result, problems have arisen in starting spinning, drawing yarns, and performing stable spinning operations.

The spinning solution comprising the dissolved cellulose solution is extruded into the gas medium in the gas zone (gap) and then inserted and passed through the coagulation bath into the coagulation bath, drawing the cellulose fiber and winding it up Methods for making fibers are disclosed in EP-A-0,817,873. In this method, the extruded spinning liquid passing through the gas zone is accelerated at a set speed and introduced into the coagulating liquid flowing in the laminar flow in the same direction as the moving direction of the extruded spinning liquid. In this case, the coagulating solution is supplied to the side of the passage of the spinning solution, and the flow direction of the spinning solution and the coagulating solution is almost parallel to the entire coagulation zone, and the cellulose fibers produced leaving the coagulation zone are deflected to the side and wound up. Will be.

It is true that the method described in EP-A-0,817,873 reduces the drawbacks of JP-A-61-19805 caused by vortices in the spinning funnel and ensures a more stable method. Moreover, it is true that the apparatus used to implement the method of EP-A-0,817,873 is simpler and cheaper. However, when processing large quantities at high speed, the method of EP-A-0,817,873 shows process instability, non-uniformity in the resulting yarns and even radiation interruption. The above-mentioned instability may be due to the fact that adhesion phenomenon occurs between the moldings during the solidification process of the molding prepared from the spinning solution using the conventional method and apparatus, among other factors.

The present invention aims to provide a mechanism for use in solidifying moldings produced from spinning liquids that can overcome the drawbacks of the prior art described above.

Still another object of the present invention is to provide a method capable of achieving a high throughput and a high spinning speed, which is tacky and stable with the aid of the aforementioned mechanism.

This problem is solved by the coagulation bath of the type described above, the coagulation bath comprising a cover sheet having at least one hole for supporting at least one coagulation bath discharge nozzle, the cover sheet having at least one solution. The at least one coagulation bath discharge nozzle, installed above the solids inlet and below the at least one coagulant outlet and supported by at least one hole formed in the cover sheet, has a plurality of outlet holes in the form of a ring surrounding at least one coagulation bath discharge nozzle. It was arranged to form.

Since one coagulation bath has a plurality of coagulation bath discharge nozzles, a plurality of coagulation bath support holes are formed in one carver sheet. In the following description, there are a plurality of coagulation bath discharge nozzles, so that the principle is referred to as "coagulation bath discharge nozzles", but in the following description, only one coagulation bath is described, and the expression is also simply expressed as "coagulation bath discharge line." . Skilled artisans are skilled in the art and the function of the coagulation bath within the scope of the present invention is not specified or limited by the number of coagulation bath discharge nozzles and is not specified or limited by the number of holes in the carver sheet associated with such coagulation bath discharge nozzles. You will know it doesn't.

The coagulation bath according to the invention is usefully used when the spinning solution is a cellulose solution in a solution composed of tertiary amine N-oxides, especially N-methylmorpholine N-oxide and water. As is known, cellulose before spinning is dissolved at a high temperature of 55-130 ° C. in a suitable solvent such as tertiary amine N-oxide and water. The solution of cellulose in tertiary amine N-oxide and water is extruded hot through the spinneret and molded in the process. The thus shaped solution passes through a coagulation bath containing a substance that does not dissolve cellulose, for example an aqueous solution, which is washed away from the solution in which the tertiary amine N-oxide is formed and the cellulose is formed. Solidifies in a state. Cooling of the molded solution takes place between the spinneret and the coagulation bath, ie in the air gap. This cooling is effected by atmospheric gas, for example air alone, but may also be generally by means of additional blowing gas, for example conditioned air.

According to the invention, the coagulation bath has a so-called carver sheet, which is formed such that one or more holes are aligned so as to align with one or more coagulation bath discharge nozzles, resulting in a periphery of the coagulation bath discharge nozzle. Many holes were formed in a ring shape. The cover sheet may be composed of a metal plate. In this case, the coagulation bath discharge nozzle was arranged at its upper end, i.e., the inlet, close to the ring of the hole formed by the nozzle and the cover sheet. The cover sheet is preferably positioned so as to form a plane with the top edge of the coagulation bath discharge nozzle, and none of the coagulation bath discharge nozzles protrude above the plane formed by the cover sheet.                 

Thus, according to the present invention, one or more holes are formed in the carver sheet in the form of a ring around at least one coagulation bath discharge nozzle. This configuration is easily achieved by allowing the carver sheet to include a circular hole having a diameter larger than that of the coagulation bath discharge nozzle. With this arrangement, holes, for example ring-shaped slits, are formed in the cover sheet around the solidification bath discharge nozzle. Although not preferred, the holes surrounding the coagulation bath discharge nozzle in the carver sheet may be arranged such that small holes, such as ring-shaped holes, are densely arranged in the carver sheet around the hole closed by the coagulation bath discharge nozzle. That is, small holes were drilled in the cover sheet.

Holes formed in the shape of a ring in the cover sheet around the coagulation discharge nozzle may be continuous or discontinuous. Ring-shaped slits around the coagulation bath discharge nozzle as described above serve as, for example, continuous holes. However, the holes are more preferably in a discontinuous form. In a preferred example, the coagulation bath has a carver sheet, and the hole formed in the carver sheet has at least one land projecting inward from the edge of the hole toward the center of the hole. These holes are arranged around the coagulation bath discharge nozzle, which holes are formed circularly around the nozzle and isolated by protruding lands.

Most preferably, each of the holes in the carver sheet has six lands projecting from the periphery of the hole toward the center of the hole, with a distance of 60 ° from each other. In the case of the annular hole, the lands described above have a railing structure that forms a male diameter hole therein, for example, when all the lands have the same length. When the coagulation bath discharge nozzle is installed inside the railing so as to be centered on the railing in close contact with all lands, six circularly shaped slits are formed through the cover sheet around the coagulation bath discharge nozzle.

The cover sheet and the coagulation bath discharge nozzle are installed to be inserted into the coagulating liquid during the operation of the coagulation bath. This means that the spinning liquid is covered to a constant depth through the coagulating liquid before it reaches the inlet of the coagulation bath discharge nozzle. The coagulant outlet is located above the cover sheet. The coagulant therefore leaves the coagulation bath on the carver sheet. Of course, part of the coagulating liquid is discharged through the coagulation bath discharge nozzle. In the case of the coagulation bath according to the present invention, it is preferable that the coagulation solution is adjusted so that the water level is controlled at the discharge point having at least one discharge weir (drainage) to adjust the filling height of the coagulation solution. In a preferred embodiment of the present invention, the coagulation bath has a four-sided basic shape with four sidewalls, of which two opposing sidewalls are formed longer than the other two opposing sidewalls. For example, if two long sidewalls in the long axis are lower than the other two sidewalls, the discharge occurs through the two lower sidewalls, and the height of the two long sidewalls determines the level of coagulating liquid. That is, the two long side walls serve as the discharge weir. Of course, the overflowing coagulant is collected and reused. This is accomplished, for example, by a method of circulating the coagulating liquid back into the coagulation bath by means of a suitable overflow channel. Of course, in this case, the composition of the coagulation solution, that is, the composition of N-methylmorpholine N-oxide (NMMO) and water needs to be maintained at a set value. In some cases, one or more components of the coagulated liquor to be recycled may increase or decrease before recycling.

The height of the overflow weir can be adjusted. This adjustment is achieved, for example, by replacing the corresponding side wall. The height of the overflow weir and thus the level of coagulation liquid depends primarily on the cellulose moldings formed and the spinning conditions. Therefore, in the production of yarns or multifilaments, linear density (titration) and spinning speed are affected.

In a particular example of the coagulation bath, the overflow weir may be serrated. According to this configuration, uniform discharge occurs over the entire length of the coagulation bath.

According to the present invention, the inlet of the coagulating liquid is located under the cover sheet. The coagulant inlet is located underneath the carver sheet, the outlet is located above the carver sheet, and the position of the carver sheet can be set with the aid of an overflow weir, so that the flow of coagulant from bottom to top is made inside the coagulation bath. In this method, the flow of coagulant liquid is discharged through a hole disposed in the cover sheet in the form of a ring around the coagulation bath discharge nozzle, for example, a ring-shaped slit. The solidified molding flows back to the solidifying liquid from above, so that the molding is immersed in the solidifying liquid to a certain depth before reaching the inlet side of the solidifying bath discharge nozzle and the solidifying liquid flows over a predetermined distance with respect to the molding to be solidified. In other words, the coagulation bath according to the present invention is a countercurrent coagulation bath, and the coagulation liquid flows in a direction opposite to the moving direction of the molded product to be injected. For example, when the molding is calculated based on the moving direction of the molding moving from the inlet side to the coagulation bath discharge nozzle side, it flows in the opposite direction of 180 °. This countercurrent causes solidification to occur significantly and to significantly improve the quality of the solidified moldings. Due to such a reverse flow, it is believed that the vortex (twist) of the coagulating liquid does not appear or decrease at the inlet side where the solidified molding enters the coagulation bath, and that the monofilaments of the yarn, for example, are prevented from sticking inside the molding. This positive effect is achieved when spinning the filaments, in particular high density (titration) multifilament yarns, at high speed, in particular at 100-1,500 m / min, in particular at 500-1,000 m / min, preferably at 800-1,200 m / min. Is especially important. For this reason, the coagulation bath according to the present invention can be advantageously used in the case of spinning the filament at high speed.

The supply of the coagulation liquid to the coagulation bath is made through a distribution tube disposed at the lower portion of the cover sheet, parallel to the longitudinal side wall of the coagulation bath. This distribution tube has a number of small discharge holes formed over the entire length of the tube, through which the coagulant liquid flows into the coagulation bath. These vent holes assist in the uniform inflow of coagulant solution. Preferably, the distribution tube extends to cover the entire length of the coagulation bath, and the discharge hole is preferably formed to be uniformly distributed to cover the entire length of the tube.

In a preferred example of the invention, the distribution tubes are installed such that the discharge holes are inclined downwardly at an angle of about 45 ° towards the bottom of the coagulation bath. This configuration results in a more effective flow in the coagulation bath according to the present invention. Furthermore, the direct supply of coagulant liquid through the distribution tube over the entire length of the coagulation bath results in a coagulation solution in which temperature and additives, for example NMMO, are uniformly distributed over the entire length of the coagulation bath. In particular, this method makes it unlikely that the yarns will get tangled with each other. It is also preferable that the coagulating liquid is symmetrically supplied to the coagulation bath discharge nozzle in both directions. This supply of coagulant liquid can be achieved by allowing the two distribution tubes to be parallel to the two long sidewalls of the coagulation bath while also being symmetrical with respect to the coagulation bath discharge nozzle rows. According to the method of supplying the coagulation solution, the coagulation solution is more uniformly supplied and the vortex phenomenon is prevented.

The coagulation bath discharge nozzle of the coagulation bath according to the present invention may be connected to the bottom of the coagulation bath, and the discharge nozzle is preferably installed to be separated. The inlet of the nozzle is located in the coagulating liquid, and the outlet of the nozzle is buried in the bottom of the coagulation bath, which facilitates the discharge of the solidified molding, for example, the filament, and is easily pulled out to wind the molding. Of course, some of the coagulant is also buried in the filament, along with the solidified molding discharged from the coagulation bath. In order to regenerate or more easily dry such coagulating liquid, it is necessary to separate the coagulating liquid from the molding. Separation of such coagulating liquid is achieved by, for example, obliquely drawing the molding from the coagulation bath discharge nozzle. This discharge squeezes out the coagulation bath and allows it to circulate into the coagulation bath.

The coagulation bath discharge nozzle is made of an inert material, for example metal or ceramic. When the coagulation bath discharge nozzle according to the invention is made of high-grade (stainless) steel plated with matt chromium so as to have an orange shell structure, squeezing the coagulating solution on the molding is particularly advantageous for producing a solidified molding. It is done smoothly.                 

The bottom of the coagulation bath according to the present invention was formed unevenly. For example, when the coagulation bath discharge nozzles are arranged in rows parallel to the longitudinal sidewall of the coagulation bath at the bottom central part of the coagulation bath, it is preferable that the center part of the bottom face is positioned high. That is, it may be advantageous that the bottom center portion of the coagulation bath is formed closer to the cover sheet than to both sides. Distribution pipes are installed on both sides. This configuration is preferable in that the depth of the coagulation bath, i.e., the depth of the coagulating solution through which the molded article formed from the spinning solution can be kept low. In particular, the depth of the coagulation liquid directly below the coagulation bath discharge nozzle is about 10-40 mm, in particular about 10-20 mm. Surprisingly, the low depth of this coagulation bath reduces the formation of vortices as the molding passes through the coagulating liquid. As a result, the moldings are in better contact with the coagulating solution, which results in a significant improvement in the coagulation liquid filling. Because of the small depth of the solidification bath, friction losses are low even at high spinning speeds.

Moreover, it is preferable that the cover sheet of the coagulation bath according to the present invention further has at least one hole connected to the bottom surface of the coagulation bath by a small diameter tube (capillary tube). These holes formed in the cover sheet act as so-called "emergency outlets". This emergency outlet formed in the carver sheet was connected to a capillary tube through the coagulation bath, the upper edge of which was joined to the carver sheet. These capillaries were opened at the bottom of the coagulation bath, allowing the coagulation bath to pass freely. The holes in the carver sheet, which are connected to the capillary tube, serve to draw each thread quickly and smoothly through the whole coagulation bath at the beginning of the operation of the coagulation bath. The threads are then separated and introduced into each coagulation drain nozzle. When one or more spinnerets are not operated stably during the spinning operation, the corresponding capillary or monofilaments of the yarns may be discharged through the above-mentioned capillary outlet. According to this method, it is possible to prevent the closing of the coagulation bath discharge nozzle. When pulling out the thread or not using a capillary tube, the capillary tube can be closed by inserting a conical plug at the bottom of the capillary tube.

The invention also forms a cellulose solution in a solution of tertiary amine N-oxide and water in the hot state, extruding the shaped solution through a gas medium over a predetermined gas zone (air gap) and then solidifying the extruded molding. In the method for producing a cellulose molding by introducing into a coagulation bath for the purpose of forming, the coagulating solution flows in a direction opposite to the direction of movement of the molded solution at the point where the coagulating solution enters into the coagulation bath during solidification. It also relates to a cellulose production method characterized by the above-mentioned.

The flow of coagulating liquid countercurrent to the flow direction of the molded cellulose solution in the coagulation bath results in uniform and effective coagulation, which has an advantageous effect on the properties of the final molding. In particular, spinning of cellulose fibers or filaments using such a counterflow process is advantageous for yarn (fiber) properties.

Solidification of the aforementioned cellulose moldings can be achieved using the coagulation bath according to the invention.

In the case where the cellulose moldings produced according to the invention are cellulose fibers or filaments, it is preferred that they exit the coagulation bath and then undergo known treatments such as washing, finishing treatment, drying and winding.                 

In particular, it is preferred that the cellulose fibers or filaments from the coagulation bath such as the coagulation bath according to the present invention exit laterally in contact with the outlet edge of the at least one coagulation bath discharge nozzle and then undergo further post-treatment. Do. Moreover, it is more preferred that the lateral conversion of the molded cellulose fibers or filaments as described above allows the fibers or filaments to pass through the outlet edge of the coagulation bath discharge nozzle. In this way, the coagulant on the fiber or filament is squeezed out.

The method according to the invention provides a uniform solidification method that can be applied to all yarns, ie fibers. The resulting yarns have a high degree of homogeneity in physical, optical and fibrous properties. The process according to the invention also provides a high density density filament, in particular a multifilament of 100-1,500 m / min, in particular 500-1,000 m / min. More preferably, it is possible to spin at a high speed of 800-1,200 m / min.

An advantage of the coagulation bath according to the invention and the method according to the invention is that a product is obtained which has an excellent dyeability (absorbency) in the spinning of the filaments. In fabrics made from the filaments described above, in particular plain fabrics, this effect is evident in that it significantly reduces the tendency of streaks or streaks to form. This positive result is due to the special geometry of the coagulation bath, in particular the coagulation bath depth at the critical coagulation bath discharge nozzle position. In particular, it is believed that such low coagulation bath depth has contributed decisively to bringing the above-mentioned advantages which were not previously predicted.

Detailed Description by Drawing

Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional schematic view showing a suitable example of the coagulation bath according to the present invention, FIG. 2 is a schematic view showing a drainage weir with a tooth form viewed from the side, and FIG. 3 is a schematic view showing a plane of a carver sheet viewed from above.

The coagulation bath is located below the spinneret 1 and the air gap 2. The coagulation bath was able to adjust the height, that is, the spacing between the spinneret 1 and the coagulation bath, using the adjusting screw. According to this configuration, it is possible to adjust the width of the air gap 2, that is, the interval between the spinneret 1 and the coagulation bath.

The coagulation bath illustrated in FIG. 1 has a length of about 1000 mm and a width of 250 mm. On both sides of each coagulation bath were formed exchangeable serrated drainage banks 5 and drainage channels 12. On the narrow side of the coagulation bath, a supply pipe for supplying the coagulation solution 4 was connected. The feed tube is located in the center and connected to two distribution tubes 8 sealed with a T-piece and an O-ring to distribute the coagulating liquid over both sides of the coaxial bath. Both distribution tubes 8 had an outer diameter of 20 mm and were parallel to the long axis sidewalls of the coagulation bath. These distribution pipes 8 each have 40 discharge holes so that the coagulating liquid 4 can be uniformly distributed along the entire long axis sidewall of the coagulation bath. The distribution pipe 8 was installed so that the discharge hole may be downward at an angle of 45 ° from the horizontal. The outer end of the distribution tube corresponding to the opposite side of the T-piece was closed with a stopper and sealed with polytetrafluoroethylene tape. At the central part of the coagulation bath, a coagulation bath discharge nozzle 10 is disposed parallel to the long axis sidewall of the coagulation bath. Each fiber (thread) 10 composed of a plurality of monofilaments 3 is discharged through the discharge nozzle 10. The coagulation bath discharge nozzle 10 was separable and, when used in the coagulation bath, was supported by an O-ring and sealed to the coagulation bath side. The coagulation bath discharge nozzle 10 was made of stainless steel with matt chrome plating. Matt chrome plating allows the formation of an orange peel structure on the surface.

In the coagulation bath, a cover sheet 6 having a hole into which the coagulation bath discharge nozzle 10 is inserted and fixed is provided. This carver sheet 6 was coupled to the upper end of the coagulation bath discharge nozzle 10, and an additional six emergency discharge holes were formed in the carver sheet.

The emergency vents in the carver sheet were coupled to a capillary tube 7 installed to be inserted into the coagulation bath, and the top was joined to the carver sheet 6. The capillaries 7 are located parallel to the coagulation bath discharge nozzle 10. The bottom of the coagulation bath was formed with a hole through which the capillary tube 7 can pass freely. These capillaries 7 can be closed with conical rubber stoppers 9 when not in use. The emergency capillaries 7 were welded to the bottom of the coagulation bath.

2 is a schematic view showing the discharge weir 5 of FIG. The upper end of the weir 5 shows that the coagulated liquid is serrated so that the coagulant can overflow evenly.

Figure 3 shows the cover sheet 6 of Figure 1 in plan view. In this figure, a hole 13 for the coagulation bath discharge nozzle 10 can be seen. Each hole 10 has six lands 14 held at an angle of 60 ° to each other. These lands 14 protrude inward so that the inner end forms the inner diameter of the hole 13. Accordingly, the coagulation bath discharge nozzle 10 is accurately inserted and fixed in the inner diameter of the hole 13. Moreover, FIG. 3 shows an emergency discharge hole 15 for the emergency capillary tube 7 shown in FIG.

The upper edge of the emergency discharge hole 15 is formed to be inclined at 45 ° so that the corner is not sharp. These two holes 13, 15 shapes in the cover sheet 6 are arranged such that the emergency discharge hole 15 is positioned between the two holes 13 into which the coagulation bath discharge nozzle 10 is inserted and fixed. . The above-mentioned emergency discharge hole 15 is always prepared for the two fibers 11.

The coagulation bath shown in FIG. 1 is a countercurrent coagulation bath, in which the coagulating solution flows in a direction of 180 ° with respect to the fiber or monofilament moving direction entering the coagulating solution as indicated by the arrow in FIG.

The coagulant is circulated through the reservoir. This circulation consists of a storage vessel, a concentration controller for adjusting the components of the coagulating liquid 4, a pump, a heat exchanger for temperature control, a filtration system, a flow meter for controlling the required volume and a coagulation bath. The excess coagulant liquid composed of the coagulant liquid 12 overflowing from the coagulation bath is returned to the storage container together with the coagulant liquid 4 squeezed from the fiber 11. The coagulation bath circulation takes place at a constant temperature fixed at 5-30 ° C. The wet fibers leaving the coagulation bath squeeze out some of the coagulant that has not been squeezed and the squeeze coagulates. For example, as a result of diffusion of NMMO from the filament into the coagulation solution, the coagulation solution contains a large amount of NMMO. Supplementation of some coagulation bath components, such as water to compensate for the losses pulled with the fiber and to maintain the required NMMO concentration, is accomplished by the NMMO concentration regulator. Of course, additional coagulation bath components may be added to avoid accumulation and settling and to change the properties of the moldings.

As described above, during the operation, each filament 3 of the fiber 11 enters the coagulation bath from the top to the bottom, and the coagulating liquid 4 is squeezed from the fiber 11 and discharged from the coagulation bath discharge nozzle 10. . Moreover, the surface of the coagulation bath is stabilized by the cover sheet 6 lying in the coagulation bath so that the entire surface of the coagulation bath becomes uniform in height and no vortex appears on the surface.

Claims (15)

A coagulation bath containing a coagulation bath for coagulation of a molded product formed by spinning liquid, in which the coagulation bath is provided with at least one coagulation bath nozzle on the bottom surface, and the coagulation bath is formed of spinning liquid and the opposite end thereof. In a coagulation bath having a coagulation bath with at least one coagulation fluid inlet and coagulation fluid outlet, the coagulation bath supports a coagulation bath discharge nozzle and has a cover sheet having at least one hole. Wherein the cover sheet is located above and below the coagulant outlet, and at least one coagulation bath discharge nozzle supported by at least one hole formed in the cover sheet has at least one hole in the surrounding cover sheet. A coagulation bath characterized in that it is arranged in a ring shape. The coagulation bath according to claim 1, wherein the spinning solution is a solution of cellulose in tertiary amine N-oxides, in particular N-methylmorpholine N-oxime and the like. 3. A coagulation bath according to claim 1 or 2, wherein one coagulation bath discharge nozzle supported in at least one at least hole supported on the cover sheet is coupled such that the inlet of the coagulation bath discharge nozzle is flush with the cover sheet. The coagulation bath according to claim 1 or 2, wherein at least one hole in the cover sheet has at least one land projecting from the periphery of the hole toward the inner center side. 5. The coagulation bath of claim 4, wherein at least one hole in the cover sheet has at least one land from the periphery of the hole toward the center, the lands being formed to maintain an angle of 60 ° to each other. The coagulation bath according to claim 1 or 2, wherein the outlet of the coagulation bath described above has at least one discharge weir for controlling the level of the coagulation bath. 7. The coagulation bath according to claim 6, wherein the aforementioned discharge weir has a sawtooth shape. The coagulation bath according to claim 1 or 2, wherein at least one coagulation bath discharge nozzle is formed of matt chrome plated stainless steel. The coagulation bath according to claim 1 or 2, wherein the cover sheet has at least one hole connected to the bottom surface of the coagulation bath by a capillary tube. The coagulation bath according to claim 1 or 2, wherein the coagulation bath allows the spinning filament to pass at a speed of 100-1,500 m / min. Cellulose which is molded hot with a solution of tertiary amine N-oxide and a cellulose solution in water, extruded the molded solution into a gas medium over a set gas zone and then into a coagulation bath for solidification. In a method for producing a molded article, a method for producing a cellulose molded article characterized in that during the solidification, at least a portion of the solidified bath is injected into the coagulating solution against the direction of movement of the molded article. 12. The method of claim 11, wherein the coagulation of the cellulose moldings in the coagulation bath takes place in the coagulation bath according to one of the preceding claims. The method of claim 12, wherein the cellulose moldings are cellulose fibers or filaments that are post-processed after leaving the coagulation bath. The method of claim 13 wherein the cellulose fiber or filament leaving the coagulation bath is displaced to contact the periphery of the outlet of the coagulation bath discharge nozzle and subsequently processed. The method of claim 11 or 12, wherein the multifilament yarns are spun at a speed of 100-1,500 m / min.

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