JP2006057206A - Apparatus and method for producing fiber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for producing a fiber, capable of preventing the reduction of the yield and the quality of the product caused by the influence of solid salt deposits derived from a neutralizing agent remaining on the surface or in the inside of the fiber in a drying step of the fiber produced by a wet spinning method; and to provide a method for producing the fiber. <P>SOLUTION: The apparatus for producing the fiber having ≥50 GPa modulus by the wet spinning method has rollers 2, 2' for conveying the fiber, arranged on a conveying passage for conveying the fiber taken out from a coagulating liquid to the drying step, a fiber guide 3 for compulsorily and reciprocatively moving the fiber to which tension is imparted by the rollers 2, 2' in the roller axis direction, and removing means 4, 4' for removing the liquid excessively attached to the fiber by contacting with the fiber, and installed at least in one of an upstream side and a downstream side of the fiber guide 3 in the fiber-conveying direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an apparatus and a manufacturing method for manufacturing a fiber having a high elastic modulus (for example, an elastic modulus of 50 GPa or more) by a wet spinning method.

  Super fibers with excellent properties such as strength, elastic modulus, heat resistance and flame resistance are used in a wide range of fields such as civil engineering, agriculture, forestry and fisheries, and industrial materials. Examples of such super fibers include para-aramid fibers, polybenzazole fibers (PBO fibers), ultrahigh strength polyethylene fibers, and polyarylate fibers.

  Some of these fibers are manufactured by a wet spinning method. For example, Patent Document 1 discloses a method for producing polybenzazole fibers. Here, a polybenzazole dope consisting of a polymer of benzazole and a solvent such as polyphosphoric acid is extruded from the spinneret pores into a coagulating liquid such as an aqueous phosphoric acid solution to form a fiber, which is washed to be contained in the fiber. A method is described in which the solvent and the coagulating liquid are removed, and the acid ions remaining in the fiber are neutralized by contacting with an alkaline aqueous solution (neutralizing agent) and then dried.

Patent Document 2 discloses a method for producing aramid fibers, and here, as in Patent Document 1, a wet spinning method is adopted, and the fibers before drying that have undergone coagulation, washing, and neutralization steps are conveyed. A method of winding around a roller and blowing superheated steam onto the fiber and drying with heating means provided inside the roller is described.
US Pat. No. 5,525,638 US Pat. No. 5,174,046

  In the above-described wet spinning method, in order to complete the neutralization step in a short time, the alkaline aqueous solution brought into contact with the fiber contains an excess of alkali ions relative to the acid ions remaining inside the fiber. Then, in the drying step subsequent to the neutralization step, the alkaline aqueous solution (which may contain a coagulating liquid component) used in the washing and neutralization step is formed on the surface of the fiber bundle (yarn or tow) and the fiber gap. The fibers in the state of being held (entrained) will be introduced.

  Therefore, in the drying device, the entrained liquid of the fiber spreads on the fiber transport roller, and when this is heated, the water is evaporated and concentrated, and the reaction between the components in the entrained liquid and carbon dioxide in the air is generated. The solid salt that is a thing may precipitate on the conveyance roller surface. For example, in the case of producing polybenzazole fiber, sodium phosphate or sodium carbonate is precipitated as a salt derived from phosphoric acid contained in the coagulation liquid or sodium contained in the neutralizing agent. Such a solid salt has a problem in that the smoothness of the roller surface is lowered to cause yarn breakage and the like, resulting in a reduction in operability and a reduction in product quality such as fuzz defects. In particular, fibers with a rigid molecular structure such as polybenzazole and para-aramid that have a high modulus of elasticity compared to acrylic fibers with a flexible molecular structure of the polymer have a higher strength in the fiber axis direction (length direction). Although excellent, the strength against compression and twisting from the side surface is inferior, and when contacted with the solid salt as described above, the surface of the single fiber tends to be rolled up and easily damaged.

  The present invention has been made paying attention to the above circumstances, and in the drying process of the fiber produced by the wet spinning method, the yield due to the influence of the solid salt deposit derived from the neutralizing agent remaining on or inside the fiber. It is an object of the present invention to provide a fiber manufacturing apparatus and a manufacturing method that can prevent a decrease in product quality and product quality.

  The fiber manufacturing apparatus of the present invention that has solved the above problems is an apparatus for manufacturing a fiber having an elastic modulus of 50 GPa or more by a wet spinning method, and transports the fiber pulled up from the coagulating liquid to the drying step. A roller that is arranged on the conveyance path and conveys the fiber, a fiber guide that forcibly reciprocates the fiber tensioned by the roller in the roller axial direction, and upstream and downstream of the fiber guide in the fiber conveyance direction It has a gist in that at least one of the sides is provided with a removing means for removing liquid excessively attached to the fiber by contacting the fiber.

  As a result of investigations to solve the above problems, the inventors of the present invention have found that the operability and product quality degradation due to the solid salt deposited on the surface of the transport roller is the same as that of the fiber introduced into the drying apparatus on the roller. I found out that it was to pass the passage. That is, the entrained liquid that exudes from the fiber in the drying process spreads on the roller, but in the region where the fiber on the roller passes, the surface of the roller is always wiped off by the fiber passing through the region. In the region where the upper fibers do not pass, the entrained liquid that exudes from the fibers accumulates. The entrained liquid collected in the fiber non-passing region is heated and concentrated, and finally precipitates as a solid salt and deposits on the roller surface. The precipitation of the solid salt causes the fiber passage region on the roller to be in a so-called wrinkle state, and it is considered that when the fiber moves in the roller axial direction by some kind of elasticity and comes into contact with the solid salt, a defect occurs in the fiber.

  Therefore, the present inventors have made further studies. As a result, when the fiber is conveyed while reciprocating in the roller axis direction, the surface of the roller is wiped off by the fiber conveyed by the roller, and the fibers exude from the fiber. It has been found that the entrained liquid and the like can be conveyed together with the fibers to suppress precipitation of solid salt on the roller surface. Further, if the amount of the entrained liquid flowing into the drying apparatus together with the fibers is reduced in advance, the salt precipitation suppressing effect can be further enhanced.

  The removing means is a rod-shaped member that can contact at least one of the upper surface and the lower surface of the conveyed fiber, and it is preferable that a plurality of the rod-shaped members are arranged in parallel with the roller.

  Furthermore, it is desirable that the fiber guide has comb teeth, and when there are a plurality of fibers to be conveyed, the amplitude of the reciprocating motion of the fiber guide is determined between the fiber and the fiber traveling on the roller. It is recommended that the width be greater than.

  The present invention also provides a method for producing a fiber that can solve the above-mentioned problems, and the production method of the present invention is a method for producing a fiber having an elastic modulus of 50 GPa or more by a wet spinning method, A place where tension is applied to the fiber by a roller arranged on the transport path for transporting the fiber pulled up from the liquid to the drying process, and the fiber tensioned by the roller is forcibly reciprocated in the roller axis direction. It has the characteristics.

  Further, the production method of the present invention includes a liquid that is in contact with at least one of the upper surface and the lower surface of the fiber conveyed by the roller and is excessively attached to the fiber by a rod-shaped member disposed in parallel with the roller. Is preferably removed.

  The reciprocating movement of the fiber is desirably performed at an initial stage of the drying process. This is because the amount of water contained in the fiber is the highest in the initial stage of the drying process, and it is considered that salt is likely to precipitate.

  By using the production apparatus and production method of the present invention, it becomes possible to suppress the precipitation of the solid salt due to the influence of the neutralizing agent in the drying process, so that the operability of the production process is reduced due to the precipitation of the solid salt. Is suppressed, and the yield of the textile product is improved. Further, since the amount of heat during drying can be suppressed by reducing the amount of the aqueous solution introduced into the drying process in advance, it also has the effect of reducing the cost by energy saving and reducing the generation of carbon dioxide gas.

  The fiber manufacturing apparatus of the present invention is an apparatus for manufacturing a fiber having an elastic modulus of 50 GPa or more by a wet spinning method, and a transport path for transporting a fiber that has been contacted with a coagulation liquid and further extracted with a solvent to a drying process. A fiber guide disposed on the fiber, a fiber guide forcing the fiber tensioned by the roller to reciprocate in the axial direction of the roller, and an upstream side and a downstream side of the fiber guide in the fiber transport direction. It is characterized in that at least one of them is provided with a removing means for removing the liquid excessively attached to the fiber by contacting the fiber.

  FIG. 1 shows a typical schematic diagram of a fiber production apparatus of the present invention. In FIG. 1, 1 is a fiber, 2 and 2 'are rollers, 3 is a fiber guide, and 4 and 4' are liquid removal means (scrapers).

  A dope filament (fiber 1) obtained by extruding a spinning dope composed of a raw material polymer and a solvent into a coagulation bath is subjected to a washing and neutralization step (not shown), and the roller 2 and 2 ′ are used to rotate the roller 2 , 2 ′, the fiber guide 3 and the liquid removing means 4, 4 ′, and then conveyed to a drying device (not shown).

  The rollers 2 and 2 'function as means for applying tension to the fiber 1 and transporting it. Therefore, it is preferable that the rollers 2 and 2 'are provided with driving means. In addition, although the aspect provided with two rollers 2 and 2 'was shown in FIG. 1, this invention is not limited to this example, One roller may be sufficient and two or more rollers are sufficient. An aspect provided with a roller may be sufficient.

  The roller 2 (2 ') is preferably resistant to the entrained liquid contained in the fiber 1, and is made of stainless steel or a material obtained by performing chromium oxide plating or ceramic coating on the surface of the steel. Is preferred. In order to prevent corrosion due to the entrained liquid, it is also preferable that the roller surface is subjected to a plating treatment such as a nickel plating layer base treatment or a chromium oxide multilayer treatment. In the case of ceramic coating, it is more preferable that a sealing treatment is applied.

  The fiber 1 applied with tension by the roller 2 (2 ') is then sent to a fiber guide 3 provided between the rollers 2 and 2'. The fiber guide 3 is provided to reciprocate the fiber 1 in the axial direction of the roller 2 (2 '). By adopting such a configuration, the fibers 1 can be reciprocated (oscillated) in the axial direction of the transport roller in the subsequent drying apparatus. In the present invention, the fiber 1 is reciprocated as described above, so that the entrained liquid spreading on the surface of the conveying roller in the drying device is wiped off by the fiber 1 to suppress the precipitation of the solid salt. The fiber transport roller surface inside is kept smooth and clean.

  The installation position of the fiber guide 3 is not particularly limited as long as the fiber 1 can be reciprocated at the initial stage of the drying process, and is provided at an arbitrary position on the conveyance path until the fiber 1 reaches the drying device. Can do. The fiber guide 3 is preferably provided on the same plane as the roller 2 (2 '). This is because if the fiber 1 is bent at an acute angle by the fiber guide 3, unnecessary tension or friction is generated in the fiber 1 and thread breakage may occur.

  Since the fiber guide 3 comes into contact with the fiber 1, it is preferable that the surface thereof has a smooth finish in which the fiber 1 containing the aqueous solution derived from the cleaning / neutralization step slides well. Examples of the material of the fiber guide 3 include stainless steel and pore-free (dense without fine pores) ceramics finished in a mirror surface. This is because if the portion in contact with the fiber 1 is finished smoothly, the fiber 1 can be guided without being worn by the hydroplane phenomenon.

  The form of the fiber guide 3 is not particularly limited as long as the fiber 1 can reciprocate the fiber 1 in the roller axis direction, but a comb-shaped guide, a rod-shaped guide provided with a guide groove (U type, V type), or the like. Can be mentioned. In addition, it is preferable that the said fiber guide 3 has a comb tooth from a viewpoint of preventing the contact of the fibers 1 conveyed and making the fiber 1 reciprocate reliably. When the fiber guide 3 has comb teeth, it is preferable to adjust the interval between adjacent comb teeth so that the fiber 1 itself moves by reciprocating movement of the fiber guide 3.

  The reciprocating movement (swing) of the fiber 1 by the fiber guide 3 may be continuous or performed intermittently. However, in order to keep the roller surface clean at all times, it is preferable to move the fiber guide 3 continuously.

  What is necessary is just to set suitably the time period of a reciprocating movement according to the quantity of the entrainment liquid contained in the fiber 1 surface and fiber space | interval, the roller peripheral length in a drying apparatus, and the distance between the fibers which drive | work on this roller. For example, when increasing the spinning speed or increasing the concentration of the neutralizing solution used in the neutralization step, it is preferable to shorten the cycle of the reciprocating movement, and when the roller diameter is small or the interfiber distance is small. Even when the amount of aqueous solution (solid salt forming component amount) accompanying the fiber 1 per unit area of the roller is large, it is preferable to shorten the period of reciprocation. However, if the reciprocating period becomes too short, the fiber may be damaged by friction depending on the contact mode between the roller and the fiber in the drying apparatus. Therefore, it is desirable to set the cycle of the reciprocating movement so as to slowly reciprocate with a long period in a range where the generation of solid salt is not recognized by the naked eye while observing the roller surface state in the drying apparatus. Practically, it is preferably 3 to 300 minutes.

  The amplitude of the reciprocating movement may be appropriately determined according to the number of traveling fibers and the threading type in the drying device. For example, when the drying device uses a one-way method to pass a large number of fibers through multiple rollers, if the amplitude of the reciprocating movement is set to the interval between adjacent fibers, the fibers 1 move evenly in the roller axis direction. Can be made. In the actual traveling fiber in the fiber manufacturing process, uncontrolled swinging that does not depend on the fiber guide 3 also occurs. Therefore, although it is not necessary to move the fiber strictly with the amplitude, it is preferable to move the fiber 1 in the axial direction of the roller surface in the drying apparatus in order to suppress the precipitation of the solid salt. Therefore, it is preferable that the amplitude of the reciprocating movement is large. Moreover, although it is difficult to obtain the wiping effect by the fiber 1 at the end portion in the roller axial direction (region where the running fiber does not exist), if the amplitude of the reciprocating movement of the fiber guide is increased, the yarn path between the rolls sandwiching the fiber guide As a result, a force (restoring force) that relaxes the tension received by the movement of the fiber guide acts on the traveling fiber, so that the frequency with which the fiber travels in the end portion in the roller axial direction decreases. Moreover, since the vibration of the traveling fiber is reduced by this tension, the frequency of the fiber traveling in the end portion in the roller axial direction is reduced in the drying device downstream of the fiber guide. It is preferable that the amplitude of the reciprocating movement is not less than the distance between adjacent fibers, and more preferably not less than 1.2 times the distance between adjacent fibers. However, if the amplitude is too large, the width of the drying apparatus becomes unnecessarily large and the drying apparatus itself is enlarged, so the upper limit of the amplitude is preferably 5 times or less the distance between adjacent fibers. More preferably, it is 2.0 times or less.

  The reciprocating pattern is not particularly limited, and may be arbitrarily set using a scroll cam, a heart cam, or the like.

  Next, the fiber 1 reciprocated by the fiber guide 3 is sent to the liquid removing means 4 (4 '). This removing means 4 (4 ') reduces the amount of entrained liquid contained in the surface of the fiber 1 and the fiber gap. In the present invention, the fiber guide 3 is used to swing the fiber 1 and move it on the conveying roller in the drying apparatus, and the fiber 1 itself keeps the roller surface clean, and the removing means 4 Thus, the precipitation of solid salt in the drying apparatus is also suppressed by reducing the amount of entrained liquid that flows along with the fibers and flows into the drying apparatus.

  The removing means 4 (4 ') is preferably configured to come into contact with the fiber 1 and allow the aqueous solution accompanying the fiber 1 to drop off. For example, the removing means 4 (4') is preferably in contact with the fiber. Specifically, the removal means 4 (4 ') is preferably disposed in contact with at least one of the upper and lower surfaces of the fiber and in parallel with the roller 2 (2'). It is also preferable that a plurality of the removing means 4 (4 ') are installed in parallel with the roller 2 (2') to sandwich the fibers. If it is this aspect, the fiber 1 is expanded and the accompanying liquid contained in a fiber gap | interval can be removed more efficiently. Moreover, the change of the assembly state of the fibers 1 due to the contact with the fiber guide 3 can be reduced. When such an aspect is adopted, the removal means 4 (4 ′) on either the upper side or the lower side of the fiber 1 is movable or adjacent to the removal means 4 so as not to hinder the threading operation. , 4 ′... Is preferably long enough.

  Examples of the removing means 4 (4 ′) include a rod-shaped member that makes contact with the fiber 1 at a point and a plate-like member that makes contact with the fiber 1 on the surface (hereinafter, these may be referred to as a scraper). .

  The scraper 4 (4 ′) is preferably made of a material that has corrosion resistance to the aqueous solution used in the washing process and the neutralization process and has a small chemical weight loss. It is preferable to have a hardness equal to or higher than that and with little physical wear. For example, there may be mentioned glass, ceramics, stainless steel and the like subjected to nitriding treatment or coating treatment.

  The scraper 4 (4 ') preferably has a smooth surface so as not to damage the fibers. The cross-sectional shape of the scraper 4 (4 ′) is not particularly limited as long as it can rapidly drop the accompanying liquid exuded from the inside of the fiber, and various shapes such as a circle, an ellipse, a polygon such as a triangle, a quadrangle, etc. Shape can be adopted.

  The number of the scrapers 4 (4 ') to be installed is not limited, and may be appropriately set by observing the amount of liquid dropped from the scraper 4 (4') provided in the immediate vicinity of the drying apparatus. In addition, from the viewpoint of efficiently removing the entrained liquid contained in the fiber, it is preferable to install a plurality of the rod-shaped members continuously. Further, the installation position of the scraper 4 (4 ') is not limited, and may be provided on the upstream side, the downstream side, or both the upstream side and the downstream side of the fiber guide 3 in the fiber conveyance direction.

  Adoption of the scraper 4 (4 ') reduces the amount of moisture adhering to and from the surface of the fiber 1, but the standard for the amount of reduction is 50% or more of the fiber mass. For example, when the moisture content is 250% relative to the fiber mass, the moisture content after passing through the scraper is preferably 200% or less, more preferably 170% or less, and even more preferably 150% or less.

  In this way, the scraper 4 (4 ′) removes the entrained liquid contained in the fiber and reduces the amount of moisture brought into the drying device in advance, in addition to the effect of suppressing solid salt precipitation in the drying device. Thus, effects such as energy saving of the drying device heat source and improvement of the life of the rollers in the drying device can be obtained. Normally, when the water adhering to the fibers is evaporated, 2257 kJ of energy is consumed as heat of evaporation per kg of water. Accordingly, the less entrained liquid brought into the dryer, the lower the energy consumption. Therefore, reducing the amount of entrained liquid can contribute to energy saving in the drying process.

  In addition, since the entrained liquid contained in the fiber 1 according to the present invention contains a large amount of solid salt forming components derived from the neutralization step, the roller surface is coated when the entrained liquid adheres to the roller surface. There is a possibility that salt penetrates into the roller from the gap of the plating to reach the base material and corrosion proceeds. Therefore, by reducing the amount of entrained liquid contained in the fiber, the amount of salt supplied onto the roller is reduced, and corrosion of the roller base material can be suppressed.

  The fiber 1 whose water content has been reduced by the removing means 4 (4 ') is sent to the drying device. The drying apparatus that can be used in the present invention is not particularly limited, but a drying apparatus that elevates the temperature of the fiber traveling in the apparatus and evaporates the moisture on the fiber surface and inside the fiber is suitable.

  In the drying step, not only the fiber surface but also the moisture inside the fiber is evaporated, so that it is required to ensure a sufficient stay time of the fiber in the drying apparatus as well as a high temperature. Accordingly, the yarn path (yarn path) in the drying device is not limited as long as it can satisfy the above requirements. For example, a method of winding a fiber around a conveying roller a plurality of times, a large number of the same drying device. One-way threading through a multi-roller capable of processing the fibers is one example.

  The heating method of the drying apparatus is not particularly limited, and any conventionally known heating method can be adopted. For example, any of the system which heats a roller with the heating means provided in the roller and raises fiber temperature, the system which contacts high temperature gas with a fiber, or the form which uses these together may be sufficient. However, at the initial stage of drying, the fiber moisture content is high, and the amount of evaporated water is large and the heat load is high. Therefore, in order to increase the time efficiency in the drying process, it is preferable to strengthen the heat source in the initial stage of drying.

  Examples of the method for strengthening the heat source include a method for increasing the temperature or flow rate of the drying hot gas, a method for increasing the energy supplied to the roller (for example, a method for enhancing the capacity of the induction heating coil), and the like.

  In the fiber manufacturing apparatus and fiber manufacturing method according to the present invention, for example, the polymer in the fiber is highly oriented in the fiber axis direction until the modulus of elasticity measured according to ASTM D 885M is 50 GPa or more. It can utilize suitably for manufacture of a fiber. For example, fibers with a rigid molecular structure such as polybenzazole and paraamide are superior in strength in the axial direction (length direction) of the fiber compared to acrylic fibers with a flexible polymer structure, but compressed from the side. It is weak against twisting and twisting, and the surface of the single fiber tends to flutter and tends to cause defects. This tendency becomes more conspicuous for fibers having an elastic modulus of 90 GPa or more, and further an elastic modulus of 110 GPa or more, and specific examples thereof include aramid fibers, polybenzazole fibers, and polyarylate fibers. The present invention can be suitably used for producing such fibers.

  Hereinafter, the present invention will be described in detail based on examples. However, the following examples are not intended to limit the present invention, and all modifications made without departing from the spirit of the preceding and following descriptions are included in the technical scope of the present invention.

[Measurement of amount of attached water by centrifugal dehydration method]
The bottom of the centrifuge tube for a hand-centrifuge is filled with 0.5 g of absorbent cotton, dried at 80 ° C. for 2 hours, cooled in a desiccator, and then tared. Next, the dried and cooled centrifuge tube is filled with 10 mg of the sample cut out from the fiber immediately after discharging the neutralization tank or before the entrance of the drying apparatus, and after rotating the sample for 5 minutes to remove the sample, the centrifuge tube weight is measured, The ratio between the increase in the weight of the centrifuge tube and the weight of the dried sample was determined as a percentage and used as the amount of water adhering to the fiber.

[Experiment 1]
A traverse device (amplitude) provided with a pair of drive rollers for conveying fibers at a speed of 450 m / min on the fiber conveyance path from the neutralization tank to the drying device, and a fiber guide having comb teeth between the drive rollers. : 9 mm, reciprocating cycle: 15 minutes), and further, a rod-shaped member (made of SUS304) having a diameter of 10 mm and a length of 350 mm on the downstream side in the transport direction (drying device side) is 5 on the upper and lower sides of the fiber, respectively. Each book was placed in contact with the fiber.

  Polybenz bisoxazole fibers (tensile elastic modulus: 180 GPa, fineness: 555 dtex, distance between fibers: 6 mm, number of running: 16) discharged from the neutralization tank (sodium ion concentration: 250 ppm) are made into fibers by the rod-like member. The entrained liquid contained in the interior was removed, and the fiber guide was conveyed to a hot air circulation dryer (250 ° C.) while reciprocating the fiber in the roller axis direction.

  The amount of water adhering to the running fibers measured by the centrifugal dehydration method was reduced from 210% (immediately after the neutralization layer was discharged) to 105% (before the inlet of the drying device). Further, no precipitate was observed on the roller surface in the dryer. The frequency of yarn breakage in the drying process of Experiment 1 was 1 per 1 billion meters.

[Experiment 2]
Polybenz bisoxazole fibers were produced in the same manner as in Experiment 1 except that the traverse device and the rod-shaped member for removing the entrained liquid were not installed.

  The amount of water adhering to the running fiber measured by the centrifugal dehydration method was 215% (before the entrance of the drying device). Sodium salt was deposited in a ring shape on the roller surface in the drying apparatus used in Experiment 2. The frequency of yarn breakage in the drying process was 36 cases per 1 billion meters.

[Experiment 3]
Polybenz-bisoxazole fibers were produced in the same manner as in Experiment 1 except that the entrained liquid was not removed by the rod-shaped member.

  The amount of water adhered to the traveling fiber before the entrance of the drying apparatus measured by the centrifugal dehydration method was 198%. In this experiment 3, there were places where precipitation of white salt was often observed on the roller surface in the drying apparatus. In addition, the frequency of yarn breakage in the drying process was 15 cases per 1 billion meters.

[Experiment 4]
Polybenz-bisoxazole fibers were produced in the same manner as in Experiment 1 except that no traverse device was provided.

  The amount of water adhering to the traveling fiber before the entrance of the drying apparatus measured by the centrifugal dehydration method was 108%. In Experiment 4, clear white salt deposition was observed along the running fibers on the roller surface in the drying apparatus. The occurrence frequency of yarn breakage in the drying process was 9 cases per 1 billion meters.

  From Experiments 1 to 4, if the fiber guide and the production apparatus and production method of the present invention are adopted, a solid salt deposit derived from the neutralizing agent is generated in the drying process of the high modulus fiber produced by the wet spinning method. Since it can suppress, it turns out that the operativity by the influence of this deposit, a yield, and also the fall of product quality can be prevented effectively.

It is a schematic diagram which shows an example of the manufacturing apparatus of the fiber of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fiber 2, 2 'roller 3 Fiber guide 4, 4' Removal means (scraper)

Claims (7)

An apparatus for producing a fiber having an elastic modulus of 50 GPa or more by a wet spinning method,
A roller disposed on a transport path for transporting the fiber pulled up from the coagulation liquid to the drying step, and a roller for transporting the fiber;
A fiber guide that forcibly reciprocates the fiber tensioned by the roller in the roller axis direction;
A fiber production comprising a removal means for removing a liquid excessively attached to the fiber by contacting the fiber on at least one of the upstream side and the downstream side in the fiber conveying direction of the fiber guide apparatus.   The said removal means is a rod-shaped member which can contact at least one of the upper surface and lower surface of the conveyed fiber, The manufacturing of the fiber of Claim 1 with which two or more this rod-shaped members are arrange | positioned in parallel with the said roller. apparatus.   The fiber manufacturing apparatus according to claim 1 or 2, wherein the fiber guide has comb teeth.   The fiber according to any one of claims 1 to 3, wherein when there are a plurality of fibers to be conveyed, the amplitude of the reciprocating motion of the fiber guide is equal to or greater than the width between fibers traveling on the roller. Manufacturing equipment. A method for producing a fiber having an elastic modulus of 50 GPa or more by a wet spinning method,
Tension is given to the fiber by a roller arranged on the conveyance path for conveying the fiber pulled up from the coagulation liquid to the drying process,
A method for producing a fiber, comprising forcibly reciprocating a fiber to which a tension is applied by the roller in a roller axial direction.   The liquid which adhered to the said fiber excessively is removed by the rod-shaped member which contacted at least one of the upper surface and lower surface of the fiber conveyed with the said roller, and was arrange | positioned in parallel with the said roller. A method for producing fibers.   The method for producing a fiber according to claim 5 or 6, wherein the reciprocating movement of the fiber is performed in an initial stage of a drying process.

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