JP2008031610A - Method and apparatus for yarn doubling of polymer fibers - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To double polymer fibers made by an electronic spinning system into an excellent yarn free from thickness unevenness in good productivity. <P>SOLUTION: An electrically-charged polymer fibers 1 produced from an electronic spinning system 100 are fed forward as a polymer fiber bundle 3 while being recovered by a circumferential surface 2 having a potential difference from the fibers, drawn out and doubled to give a yarn 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a spinning method and apparatus for polymer fibers, and more particularly to a spinning method and apparatus for charged polymer fibers produced by an electrospinning method.

  In order to spin a polymer melt or solution as a material, a charge-induced spinning method (electrospinning method) or an electrospinning method (for example, Patent Literature 1, 2) is already known. In the electrospinning method, a polymer solution is supplied to the nozzle and the polymer solution flowing out linearly is charged through the nozzle, and the distance between the charged charges is reduced as the solvent of the polymer solution evaporates. When the force increases and the Coulomb force overcomes the surface tension of the linear polymer solution, the phenomenon that the linear polymer solution is stretched explosively is obtained. This phenomenon is repeated as primary, secondary, and tertiary to create a polymer fiber having a submicron diameter, so-called nanofiber.

  In Patent Document 1, a polymer solution stored in a barrel is supplied to and discharged from a number of needle-shaped nozzles charged by a pump to produce a large amount of polymer fiber, which is charged to a polarity different from that of the nozzle. A highly porous polymer web with a very high porosity in which polymer fibers with a diameter of several nanometers to several thousand nanometers are laminated in a three-dimensional network structure by collecting and transporting them on the circumference of the collector. The technology that can be manufactured is disclosed, and the practical level is increased from the conventional experimental level.

On the other hand, in Patent Document 2, nanofibers by electrospinning have been produced as conventional webs, and are used in various ways such as artificial leather, filters, diapers, sanitary napkins, adhesive spinning agents, wiping cloths, artificial blood vessels, and bone fixation devices. However, it is difficult to obtain a mechanical property of 10 MPa or more, and there is a limit to the use in a wide range of applications. When an attempt is made to improve the mechanical property by making the nanofiber web manufactured in this way into a continuous filament, The nanofiber produced by electrospinning is pointed out that there is a problem in that a short fiber is produced by cutting the fiber into a certain length and a separate spinning process is required to produce spun yarn from this short fiber. Disclosed is a technique capable of continuously producing filaments using a web of fibers. Specifically, the polymer fibers are spun on a static surface of water or an organic solvent in a collector charged in the opposite polarity from the nozzles charged in a row and deposited to form a web. While spinning, the web deposited by spinning is pulled up by a rotating roller rotating at a constant linear speed from a point 1 cm or more away from the one end side seen in the nozzle row direction, and is compressed and stretched while being made into a continuous filament. , Drying and winding. The continuous filament obtained in this way is used to obtain a web with high mechanical properties and further expand its application range. The continuous filament can be twisted.
JP 2002-201559 A JP 2006-507428 A

  However, the technique described in Patent Document 2 is such that a polymer fiber is spun directly from each nozzle and statically deposited on multiple points corresponding to the nozzles on the collector, while the height from each nozzle is increased due to the spread of the deposition area. Utilizing the fact that molecular fibers are entangled with each other in a series of webs, the polymer fibers are drawn from the end of the web and focused on a continuous filament while continuously following the polymer fibers. While the deposition of polymer fibers spun from each nozzle on multiple points is static and almost the same, the draw area is close to the draw side because the draw-out action tends to concentrate on the draw area close to the draw side. There is a difference in the amount of polymer fiber drawn between the thick and the far deposition area, and it is difficult and unstable to properly control the thickness and mechanical properties of the continuous filament.Further, the difference in consumption accompanying the drawing of the polymer fiber deposited in a multipoint region also increases the difference in the amount deposited. Furthermore, it is necessary to suppress the drawing speed in order to make the drawing action as easy as possible to the deposition area far from the drawing side, and it is difficult to manufacture in large quantities.

  Therefore, the present inventors repeatedly conducted various experiments and studied, while collecting the polymer fiber produced by the electrospinning system on the moving collector surface and drawing it in the feeding direction while feeding it forward, the unit time Based on the relationship between the amount of spinning per unit and the moving speed of the collector surface, the amount of polymer fiber deposited on the moving surface is made constant, and the direction of the polymer fiber collected and deposited on the collector surface is the moving direction of the collector surface. The effect of aligning is obtained, and as it is pulled out in the moving direction and the feeding direction as it is, the degree of fiber alignment is high. Therefore, the continuous filament referred to in Patent Document 2 has high alignment degree and high thickness controllability. We have found that we can mix with excellent yarns, and we have realized a combined yarn technology that can improve the continuity and productivity of combined yarn.

  The object of the present invention is that, based on such development results, it is possible to obtain an excellent yarn without uneven thickness from a polymer fiber produced by an electrospinning system with high productivity and at a low cost. It is to provide a method and apparatus.

  In order to achieve the above object, according to the first aspect of the present invention, a charged polymer fiber produced from an electrospinning system is connected to this and a circumferential surface having a potential difference due to charging or connection to ground. It is characterized in that it is pulled out from the loop surface and combined with the yarn while being collected and fed to the tip.

  In such a spinning method, electrostatic recovery using the potential difference of the polymer fiber produced from the electrospinning system can be repeatedly performed almost uniformly and continuously in each part of the circumferential surface. In this way, the continuously collected polymer fiber is deposited while being oriented in the moving direction on the circumferential surface, and is fed to a certain extent as a bundle of polymer fibers that are converged to some extent and are not easily separated, and can be reliably pulled out from the circumferential surface. Like that. The polymer fiber bundle drawn from the circumferential surface can further be focused by the tension at the time of drawing, and can be combined with a yarn having excellent mechanical properties without uneven thickness and high degree of alignment.

  According to the tenth aspect of the present invention, the above method comprises a circulating means for feeding the charged polymer fiber produced from the electrospinning system to the front while collecting the charged polymer fiber at a circulating surface having a potential difference from the charged polymer fiber. It is achieved automatically by a polymer fiber synthesizing apparatus comprising a pulling and synthesizing means for pulling a polymer web collected by the circulatory means and sent to the destination from the circulatory surface to the drawn yarn. Can do.

  According to the second aspect of the present invention, the combined yarn includes a twist yarn treatment. As a result, the degree of convergence and mechanical properties of the combined yarns can be enhanced.

  According to the twelfth aspect of the present invention, the drawing and spinning means is realized as a polymer fiber spinning device provided with twisting means on the upstream side of the conveying section or winding section for drawing the polymer fiber. By using the fact that the yarn conveyed or taken up by the pulling and conveying unit from the circumferential surface is constrained to the combined yarn state, the yarn can be twisted together with the combined yarn only by giving a twist unconstrained.

  According to the eleventh aspect, the drawing and spinning means in this device is a polymer fiber spinning device characterized in that the polymer web is drawn from the circumferential surface and conveyed or wound with converging. Realize by applying.

  According to the third aspect of the present invention, the collection of the polymer fiber is performed on the polymer fiber produced corresponding to the continuous region or the plurality of regions arranged in the circumferential direction of the circumferential surface. As a result, the simultaneous collection area of the polymer fiber on the circumferential surface increases in the circumferential direction of the circumferential surface, and the amount of polymer fiber deposited on the circumferential surface to be collected and sent to the destination is increased and sent out. The number of polymer fibers can be increased.

  According to the fourth aspect of the present invention, the polymer fibers created in a wide area in the direction orthogonal to the moving direction of the circumferential surface from one or a plurality of electrospinning systems are individually formed on the circumferential surfaces arranged in parallel. It is characterized by collecting and drawing out combined yarn. As a result, in one or a plurality of electrospinning systems, it is possible to expand the production area of the polymer fiber without expanding the electrospinning system by simply expanding the production area of the polymer fiber in a direction perpendicular to the direction of movement of the circumferential surface. Therefore, it is possible to divide and collect and send them individually by electrostatic induction onto the circumferential surfaces, and simultaneously thread them into a plurality of yarns.

  According to the fourteenth aspect of the present invention, such a method is realized by a polymer fiber spinning device characterized in that a plurality of looping means and draw-out spinning means are installed side by side. .

  According to the fifth aspect of the present invention, the combined yarn is wound up. As a result, the combined yarn can be easily handled as a primary product, and can be used for manufacturing secondary products such as twisted yarns, braids, webs, woven fabrics, knitted fabrics, and the like.

  According to the sixth aspect of the present invention, the initial drawing from the circumferential surface of the polymer fiber is performed by following the lead material drawn in advance around the circumferential surface. As a result, the lead material has the same electrostatic characteristics as the circumferential surface or increases the affinity with the polymer fiber, so that the polymer fiber on the circumferential surface adheres and follows, so that Drawing can be achieved easily and reliably.

  According to the seventh aspect of the present invention, the circumferential surface is the outer circumferential surface of the rotating body. As a result, the circumferential surface can be practically used and continuously collected as a disc having a minimum size capable of obtaining a circumferential surface area suitable for collecting a group of polymer fibers that can be combined with a single yarn.

  According to the thirteenth aspect of the present invention, this method can be realized as a spinning device in which the circulating means is a rotating body that is rotationally driven.

  According to an eighth aspect of the present invention, a plurality of combined yarns are twisted into a twisted yarn. As a result, the thickness and mechanical properties of the combined yarn are increased in proportion to the number of yarns.

  According to the fifteenth aspect of the present invention, such a method includes a twisting means that twists a plurality of yarns combined in each set of the looping means and the drawing and combining means into one yarn. This is realized by a polymer fiber spinning device characterized by the above.

  According to the ninth aspect of the present invention, the twisted yarn is also wound. As a result, the twisted yarn can be easily handled as a primary product as it is, and can be used for secondary products such as ropes, braids, webs, woven fabrics, knitted fabrics, and can be easily used.

  According to the sixteenth aspect of the present invention, such a method is realized by a polymer fiber synthesizing apparatus provided with winding means for winding a twisted yarn.

  Furthermore, according to the seventeenth aspect, any one of the polymer fiber spinning devices of the tenth to fifteenth aspects can be a yarn making device combined with an electrospinning system.

In this spinning apparatus, according to the seventeenth aspect, the electrospinning system has a large number of spinning holes or spinning nozzles on a rotationally driven peripheral surface, and the supplied polymer spinning solution is charged with the spinning hole. Or a spinning vessel that drains from the spinning nozzle,
From a large number of spinning holes or spinning nozzles provided in the spinning container, the linear flowability and stretchability are enhanced by the supply pressure of the spinning solution and the centrifugal force when the container rotates, the amount of spinning per unit time, and the polymer to be spun Miniaturization of the fiber diameter can be increased.

  Moreover, the various kinds of yarns having the characteristic features as described above can be provided by the methods of the first to ninth aspects.

  Further objects and features of the present invention will become apparent from the following specific description and drawings.

  According to the present invention, a group of polymer fibers produced from an electrospinning system is continuously collected on the circumference surface, and they are aligned and converged to a certain degree, and then sent as a high-tracking polymer fiber bundle. Yarns that can be surely combined with each other even after being drawn, have uniform thickness, have a high degree of alignment, and have excellent mechanical properties can be obtained easily and at low cost with high productivity.

  Hereinafter, a method and an apparatus for combining polymer fibers according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8 for understanding of the present invention.

  The polymer fiber merging method and apparatus according to the present invention are intended for all polymer fibers produced by the above-described electrospinning, and merging into continuous yarns using the recovery process. Therefore, various polymer materials for electrospinning already known from Patent Documents 1 and 2, such as polyvinylidene fluoride (FVDF), poly (vinylidene fluoride-co-hexafluoropropylene), polyacrylonitrile, poly (acrylonitrile- Nylon series such as co-methacrylate, polymethyl methacrylate, polyvinyl chloride, poly (vinylidene chloride-co-acrylate), polyethylene, polypropylene, nylon 12, nylon-4,6, aramid, polybenzimidazole, polyvinyl alcohol, Cellulose, cellulose acetate, cellulose acetate butyrate, polyvinylpyrrolidone-vinyl acetate, poly (bis- (2-methoxy-ethoxyethoxy)) phosphazene (MEEP)), polyethyleneimide (PEI), poly (succinic acid) Ethylene), poly (ethylene sulfide), Li (oxymethylene-oligo-oxyethylene), poly (propylene oxide), poly (vinyl acetate), polyaniline, (polyethylene terephthalate), poly (hydroxybutyric acid), poly (ethylene oxide), SBS copolymer, polylactic acid, Various polymers such as biopolymers such as polypeptides and proteins, pitch systems such as coal tar pitch and petroleum pitch can be applied, and copolymers and mixtures thereof can also be applied. As the solvent, any solvent that dissolves these polymers can be used.

  The spinning method of the polymer fiber of the present embodiment includes the electrospinning system 100 illustrated in the schematic diagram of FIG. 1, the electrospinning system 200 illustrated in the schematic diagram of FIG. 2, and the electron illustrated in the schematic diagram of FIG. The spinning system 300, the electrospinning system 400 illustrated in the schematic diagram of FIG. 4, the electrospinning system 500 illustrated in the schematic diagram of FIG. 5, and the electrospinning system 600 illustrated in the schematic diagram of FIG. Basically, the polymer fiber 1 is collected from the circumferential surface 2 having a potential difference by being connected to this and charged or grounded, and sent to the destination while being fed to the drawn yarn. It is a feature. As a result, electrostatic recovery using the potential difference of the polymer fiber 1 produced from the electrospinning systems 100, 200, 300, 400, 500, 600, etc. is repeatedly performed almost uniformly and continuously in each part of the circumferential surface 2. be able to. In this way, the continuously collected polymer fiber 1 is deposited while facing the moving direction in the shape of a claw on the circumferential surface 2, and is converged to a certain extent and continuously as a polymer fiber bundle 3 that is not easily divided. So that it can be reliably pulled out from the circumference 2. The polymer fiber bundle 3 drawn from the circumferential surface 2 can further be focused by the tension at the time of drawing, and can be combined with the yarn 4 having excellent mechanical properties without uneven thickness and high degree of alignment. As a result, a group of polymer fibers produced from the electrospinning systems 100, 200, 300, 400, 500, 600, etc. are continuously collected at the circumferential surface 2 while they are gathered to some extent with an aligning action. A high-strength polymer fiber bundle 3 is sent to the tip, and even if it is pulled out at a high speed as it is, it is possible to produce a yarn 4 with excellent mechanical properties, which can be surely combined without splitting, has no uneven thickness, and has a high degree of alignment. It can be obtained easily and at low cost.

  The basic characteristics of such a method for merging the polymer fibers 1 are the electrospinning systems 100, 200, 300, 400, 500, 600, etc., as in the examples schematically shown in FIGS. The circulating means 101, 201, 301, 401, 501 and 601 for feeding the charged polymer fiber 1 produced by the electrospinning method to the front while electrostatically collecting the charged polymer fiber 1 with the surrounding surface 2 having a potential difference from the charged polymer fiber 1 Then, the polymer fiber bundle 3 sent by each of the circulating means 101, 201, 301, 401, 501, 601 is pulled out from the circulating surface 2 of each of the circulating means 101, 201, 301, 401, 501, 601 to 1 Polymer fiber spinning device 103, 203, 303, which is basically characterized by comprising pulling and joining means 102, 202, 302, 402, 502, 602 for joining the yarn 4 of the book. 403, 503, 603, etc., and these spinning devices 103, 203, 303, 403, 503, 603 and the corresponding electrospinning systems 100, 200, 300, 400, 500, 600 The yarn making apparatuses 104, 204, 304, 404, 504, and 604 are combined with the above.

  Here, the recovery of the polymer fiber 1 is performed in the continuous area A arranged in the circumferential direction of the circumferential surface 2 as in the examples of FIGS. 1 and 3 to 6 or in the circumferential direction of the circumferential surface 2 as shown in FIG. This is performed for the polymer fiber 1 produced corresponding to the plurality of regions B arranged. In this way, the simultaneous collection area of the polymer fiber 1 on the circumferential surface 2 increases in the circumferential direction of the circumferential surface 2, and the polymer of the polymer fiber bundle 3 that is collected on the circumferential surface 2 and fed to the destination is drawn out. It is possible to increase the deposition amount and overlap amount of the fibers 1 and increase the number of focusing of the polymer fibers 1 in the polymer fiber bundle 3 to be collected and sent out. Therefore, the denier value can be sufficiently increased even for high-speed recovery and withdrawal, and the mechanical properties can be increased accordingly. In addition, if the width C representatively shown in the example of FIG. 1 of the circumferential surface 2 is excessive with respect to the denier of the yarn 4 to be combined, a group of polymer fibers collected widely is a yarn having a predetermined denier value. The difficulty of focusing to 4 is increased, and if it is too small, the continuous area A or the plurality of areas B in the circulation direction of the circumferential surface 2 may be increased to increase the deposition amount and the overlap amount, but the difficulty of stably sending out is high. Therefore, after the width C of the circumferential surface 2 is made larger than the thickness of the yarn 4 to be combined in a range where the converging can be performed or in an easy range, the amount of spinning per unit time and the collector surface It is preferable to set the continuous area A or the plurality of areas B as a necessary range based on the relationship with the moving speed of the above.

  Here, the rotating means 101, 201, 301, 401, 501, and 601 forming the rotating surface 2 may be an outer peripheral surface of a belt that is driven to rotate or an outer peripheral surface of a rotating body that is driven to rotate. 1 to 6, by using a rotating body as in each example, the circumferential surface 2 is a circumferential surface suitable for collecting a group of polymer fibers that can only be combined with one yarn 4. It is practically used as a disk having a minimum size that can provide a region, and can be continuously collected in a very small space even if it includes a motor that is driven to rotate.

  On the other hand, the smaller the width C of the circumferential surface 2 is, the easier it is to increase the deposition amount and the overlapping amount of the polymer fiber 1 that is electrostatically recovered. Therefore, the potential difference between the polymer fiber 1 side to be electrospun and the circumferential surface 2 side is Usually, it is set to be between the opposite polarities by applying a high voltage of 1 to 100 kV between them, but it is set so as to have as high a potential difference as possible, and the amount of polymer fiber 1 deposited to be recovered, It is preferable to increase the amount of overlap and the stability of delivery, and it is more preferable to set it to 10 kV or more, and this has the advantage of improving the stability against high speed. However, the potential difference between the polymer fiber 1 to be electrospun and the circumferential surface 2 is determined by charging power sources 108, 208, 308, 408, 508, 608 as charging means in each example shown in FIGS. The charging may be performed by charging with charging power sources 109, 209, 309, 409, 509, and 609 as means. In this case, charging is not performed with reverse polarity as shown in the example in the figure, but even with the same polarity or grounding. Even when connected to, the charged polymer fiber 1 can be electrostatically recovered to the charged circumferential surface 2 side by giving a predetermined potential difference.

  The polymer fiber 1 to be electrospun can be charged, for example, indirectly by charging a metal container or nozzle for producing the polymer fiber 1 from a polymer material, or charging on the circumferential surface 2 side. For example, the metal plates 101a, 201a, 301a, 401a, in which the rotating surface 2 of the rotating means 101, 201, 301, 401, 501, 601 is supported by a resin rotating body 101b, 201b, 301b, 401b, 501b, 601b, 501a, 601a can be formed and charged, and electrostatic recovery of the polymer fiber 1 in the circulation means 101, 201, 301, 401, 501, 601 is concentrated on the circumference surface 2 and others. Can be prevented from being collected. However, it is also possible to charge the area between the collection area of the circumferential surface 2 with respect to the polymer fiber 1 to the delivery point used for drawing, and to neutralize or erase the charge in other areas to limit the charging area to the required range. it can. For this purpose, the metal plates 101a, 201a, 301a, 401a, 501a, 601a are provided with an insulation interval in the circulation direction within a range that does not impair the continuity of the delivery accompanied by the collection and focusing of the polymer fiber 1 by the circumferential surface 2. It is only necessary to dispose and charge only the metal plate portion in the necessary circumferential position range. In addition, it can respond also by comprising the surrounding surface 2 by the dielectric material which can carry out partial charge holding and charge removal. In this case, backing up the dielectric with a metal member is effective for maintaining the charge, and the arrangement of the metal and dielectric is opposite to that in the illustrated example. It should be noted that the surface of the non-recovery area of the circulation means 101, 201, 301, 401, 501, 601 is covered with a metal plate insulated from the circulation surface 2 and charged with a polarity opposite to the recovery polarity of the polymer fiber 1. By neutralizing or neutralizing the charge, the polymer fiber 1 can be prevented from adhering to the surface of the non-recovery area, and the recovery rate can be increased. Troubles due to the polymer fiber 1 adhering to the surface of the non-recovery area can be avoided.

  1, the example of FIG. 2, the example of FIG. 6, the example of FIG. 6, each of the spinning means 101, 201, 601 having one circumferential surface 2, It is assumed that the drawing and spinning means 102, 202, and 602 corresponding to this are provided, and in the spinning device 103 in the example of FIG. 1 and the spinning device 603 in the example of FIG. 6, one electrospinning system 100, 600 itself circulates. In contrast to the configuration in which the polymer fibers 1 are formed through a number of spinning holes or spinning nozzles (not shown), for example, arranged at intervals of 1 mm (not shown) toward the range corresponding to the continuous area A aligned in the circumferential direction of the surface 2, In the example spinning device 203, a plurality of nozzle-type electrospinning systems 200 are arranged in the circumferential direction of the circumferential surface 2 and are produced through the individual electrospinning systems 200 toward a plurality of zones B arranged in the circumferential direction. Have

  On the other hand, the spinning devices 303, 403, and 503 of the examples shown in FIGS. 3 to 5 are created from a single electrospinning system 300, 400, and 500, respectively, in a wide area in a direction orthogonal to the circumferential direction of the circumferential surface 2. A group of polymer fibers is collected on a plurality of circumferential surfaces 2 arranged in parallel and individually drawn and combined. As a result, the production area of the polymer fiber 1 from the electrospinning systems 300, 400, 500, etc. is simply expanded in the direction perpendicular to the circumferential direction of the circumferential surface 2, and therefore the arrangement area of the spinning holes and spinning nozzles is expanded. Only by arranging the circumferential surfaces 2 corresponding to the expanded production area in parallel as shown in FIGS. 2 to 5 without increasing the number of electrospinning systems 300, 400, 500, on the circumferential surfaces 2 Can be divided and collected by electrostatic charge induction to the individual yarns, individually fed, and combined with a plurality of yarns 4 individually. For this reason, all of the synthesizing devices 303, 403, and 503 shown in FIGS. 3 to 5 correspond to the circulating means 101, 201, 301, 401, 501, and 601 having the rotating surface 2 and these. It is assumed that the drawing and combining means 102, 202, 302, 402, 502, and 602 are provided. However, the nozzle-type electrospinning system 200 as in the example of FIG. 2 can be individually arranged in a direction orthogonal to the circumferential direction in correspondence with each of the plurality of circumferential surfaces 2 arranged.

  The electrospinning system 400 of the example shown in FIG. 4 continuously supplies a polymer solution to a rotating drum 400b having spinning holes 400a having a diameter of about 0.1 to 2 mm on the peripheral surface at a pitch of several mm by a pump (not shown). However, the supply pressure and the centrifugal force generated by the rotation of the rotating drum 400b as the spinning container produce a narrower polymer fiber 1 such as nanofibers more smoothly in a wider area, and each continuous area A of the plurality of circumferential surfaces 2 It is possible to supply enough.

  Moreover, the mechanical properties of the combined yarn 4 can be further enhanced by the fact that the combined yarn in each of the above cases includes twisting treatment. For this purpose, the drawing and spinning means 102, 202, 302, 402, 502, 602 of each of the spinning devices 103, 203, 303, 403, 503, 603 shown in FIGS. 1 to FIG. 4 and FIG. 6 for pulling and joining the rotationally driven winding portions 105, 205, 305, 405 and 605, or the rotationally driven examples shown in FIG. The twisting means 106, 206, 306, 406, 506, and 606 may be provided on the upstream side of the transport unit 507, respectively. Here, the twisting means 106, 206, 306, 406, 506, 606 is the yarn 4 that is conveyed from the circumferential surface 2 by the drawing / conveying unit 507 or wound by the winding units 105, 205, 305, 405, 605. Can be twisted together with the combined yarn only by giving a twist to the unconstrained. Accordingly, it is only necessary to twist the polymer fiber bundle 3 drawn from the circumferential surface 2 by rotation from the surroundings, and for example, it can be passed through a hollow shaft 700a of a hollow shaft motor 700 as shown in FIG. As shown in FIGS. 1 to 7, the rotation by the hollow shaft 700 a connects the drawing position from the winding surface 2 and the winding point by the winding units 105, 205, 305, 405, 605, or the conveyance point by the conveyance unit 507. By simply disposing at least one end side with respect to the wire, the rotating inner peripheral surface can be slid in contact with the polymer fiber bundle 3 through which the inner peripheral surface passes, and twisted and combined.

  1 to 4 and FIG. 6, the combined yarn 4 is wound up with winding portions 105, 205, 305, 405, 605 as in the drawing and combining devices 103, 203, 303, 403, 603 of the examples. The combined yarn 4 can be easily handled as a primary product by being wound by the above, and can be used for secondary products such as twisted yarns, braids, webs, woven fabrics, knitted fabrics, and can be easily used. it can.

  Further, in the drawing and combining device 503 of the example shown in FIG. 5, a plurality of polymer fiber bundles 3 drawn out from a plurality of arranged circumferential surfaces 2 are formed into a plurality of yarns 4 twisted by individual twisting means 506 and conveyed. A second twisting means 14 is passed through the next twisting means 511 upstream of the winding part 505 via the part 507, and the secondary twisted yarn 14 is wound and wound by the winding part 505. . In this way, by twisting a plurality of combined yarns into a twisted yarn 14, the mechanical properties are increased in combination with denier in proportion to the number of yarns 4. The twisting means 511 in this case can similarly use the hollow shaft 700a of the hollow shaft motor 700 as shown in FIG. 8 as in the case of the previous twisting means 506. Further, by winding the twisted yarn 14, it can be easily handled as a primary product as it is, and can be used for manufacturing secondary products such as ropes, braids, webs, woven fabrics, knitted fabrics, and can be easily used. .

  In particular, in the example of FIG. 6, a thin metal wire or a thread is wound around the circumferential surface 2 in advance as the lead material 21, and the polymer fiber recovered on the circumferential surface 2 and sent to the destination is followed by drawing out the lead material 21. Thus, the initial drawing of the polymer fiber 1 collected on the circumferential surface 2 is performed. As a result, the lead material 21 has the same electrostatic characteristics as that of the circumferential surface 2 or increases the affinity and catching property with the polymer fiber 1 to adhere the recovered polymer fiber 1 on the circumferential surface 2. The initial drawing of the polymer fiber 1 can be achieved easily and reliably.

  It is practically used for combining yarns from polymer fibers produced by electrospinning systems, and excellent yarns with no uneven thickness can be obtained with high productivity.

1 is a schematic diagram showing one example of a method and apparatus for combining polymer fibers according to an embodiment of the present invention. It is a model diagram which shows another example of the method and apparatus for combining polymer fibers according to the embodiment of the present invention. It is a model diagram which shows the other example of the fiber yarn combining method and apparatus of embodiment which concerns on this invention. It is a model which shows another example of the method and apparatus for combining polymer fibers according to the embodiment of the present invention. FIG. 6 is a schematic diagram showing still another example of a polymer fiber spinning method and apparatus according to an embodiment of the present invention. FIG. 6 is a schematic diagram showing still another example of a polymer fiber spinning method and apparatus according to an embodiment of the present invention. It is a perspective view which shows the twisted state by the twisting means in the example shown in FIGS. It is a perspective view which shows the twisted state of the some thread | yarn by the twisting means of the example shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Polymer fiber 2 Circumference surface 3 Polymer fiber bundle 4 Thread 14 Twist yarn 21 Lead material 100, 200, 300, 400, 500, 600 Electrospinning system 101, 201, 301, 401, 501, 601 Circulation means 101a 201a, 301a, 401a, 501a, 601a Metal plates 101b, 201b, 301b, 401b, 501b, 601b Rotating bodies 102, 202, 302, 402, 502, 602 Pull-out spinning means 103, 203, 303, 403, 503, 603 Yarning device 104, 204, 304, 404, 504, 604 Yarn making device 105, 205, 305, 405, 505, 605 Winding unit 106, 206, 306, 406, 506, 606 Twisting means 507 Conveying unit 108, 208 , 308, 408, 508, 608 109,209,309,409,509,609 charged power 511 twisted means

Claims (19)

A polymer characterized in that a charged polymer fiber produced from an electrospinning system is collected on a circumferential surface having a potential difference from the charged fiber and sent to the destination while being drawn into a drawn yarn from the circumferential surface. Fiber knitting method. The method for combining polymer fibers according to claim 1, wherein the combining yarn includes twisting treatment. The method of spinning a polymer fiber according to any one of claims 1 and 2, wherein the recovery of the polymer fiber is performed for a polymer fiber produced corresponding to a continuous region or a plurality of regions arranged in the circumferential direction of the circumferential surface. . The polymer fibers produced in a wide area in a direction orthogonal to the moving direction of the circumferential surface from one or a plurality of electrospinning systems are individually collected on a plurality of circumferential surfaces arranged in parallel and drawn and combined. 4. The method for combining polymer fibers according to any one of 3 above. The method for merging a polymer fiber according to any one of claims 1 to 4, wherein the yarn is wound up. 6. The method according to claim 1, wherein the initial drawing from the circumferential surface of the polymer fiber is performed by following the lead material drawn around the circumferential surface in advance. The spinning method according to any one of claims 1 to 6, wherein the circumferential surface is an outer circumferential surface of the rotating body. The method for combining polymer fibers according to any one of claims 1 to 7, wherein a plurality of individually combined yarns are twisted into a twisted yarn. The method for merging polymer fibers according to claim 8, wherein the twisted yarn is wound up. Circulating means for feeding the charged polymer fiber produced from the electrospinning system to the front while collecting it on the circumferential surface having a potential difference from this, and the polymer web collected by the circulating means and sent to the destination from the circumferential surface A polymer fiber-spinning device, comprising: a draw-spinning means for stitching the drawn yarn. 11. The polymer fiber spinning device according to claim 10, wherein the drawing and spinning means pulls the polymer web from the circumferential surface, condenses it, and feeds or winds the polymer web to the destination. 12. The polymer fiber spinning device according to claim 10, wherein the drawing and spinning unit includes a twisting unit on an upstream side of a transport unit or a winding unit that draws the polymer fiber. The polymer fiber spinning device according to any one of claims 10 to 12, wherein the circulating means is a rotating body that is rotationally driven. The polymer fiber spinning device according to any one of claims 10 to 13, wherein a plurality of sets of the circulating means and the drawing and spinning means are arranged side by side in a direction orthogonal to the moving direction of the circulating means. 15. The polymer fiber spinning device according to claim 14, further comprising a twisting means for twisting a plurality of yarns combined by each set of the looping means and the drawing and spinning means into one twisted yarn. The polymer fiber combining device according to claim 15, further comprising winding means for winding the twisted yarn. A spinning device comprising an electrospinning system and the polymer fiber spinning device according to any one of claims 10 to 16. The electrospinning system includes a spinning container having a large number of spinning holes or spinning nozzles on a peripheral surface driven to rotate, and discharging a polymer spinning solution supplied from the spinning holes or spinning nozzles while being charged. Item 18. The yarn making apparatus according to Item 17. A yarn combined by the polymer fiber combining method according to any one of claims 1 to 9.

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