JP4922144B2 - Nanofiber compounding method and apparatus - Google Patents

Description

  The present invention relates to a nanofiber combination method and apparatus for producing nanofibers by a charge-induced spinning method and using them as yarns.

  Conventionally, a charge-induced spinning method (also referred to as an electrospinning method) is known as a method for producing a nanofiber having a submicron-scale diameter made of a polymer material. In the conventional charge-induced spinning method, a polymer solution is supplied to a needle-like nozzle to which a high voltage is applied, and the charge is charged to the polymer solution that flows out linearly from the needle-like nozzle. As the solvent in the charged linear polymer solution evaporates, the distance between the charged charges is reduced, the Coulomb force acting between the charged charges is increased, and the Coulomb force is linear polymer solution. The phenomenon that the linear polymer solution is stretched explosively at the time of surpassing the surface tension of this, the phenomenon called this electrostatic explosion is repeated as primary, secondary, and in some cases tertiary, Nanofibers made of macromolecules of submicron diameter are produced.

  Also, conventionally, webs were manufactured with nanofibers produced by the charge-induced spinning method, and a variety of products such as artificial leather, filters, diapers, sanitary napkins, adhesive spinning agents, wiping cloths, artificial blood vessels, bone fixation devices, etc. Although it is utilized, it is difficult to obtain mechanical properties of 10 MPa or more, and there is a limit to the use in a wide range of applications. The nanofiber web manufactured in this way is used as a continuous thread to enhance the mechanical properties. In doing so, it was pointed out that there was a problem in that the web had to be cut into a certain length to produce short fibers, and a separate spinning process was required to produce spun yarn from the short fibers. There has been proposed a technique for continuously producing a yarn using a nanofiber web produced by a spinning method (see, for example, Patent Document 1). In this Patent Document 1, nanofibers are spun from nozzles charged in a row, and deposited so as to form a web on a static surface of water or an organic solvent in a collector charged to a polarity opposite to that of the nozzles. The web to be deposited is pulled up by a rotating roller rotating at a constant linear speed from a point 1 cm or more away from one end side viewed in the nozzle row direction to form a continuous yarn, which is compressed, stretched, dried and wound. A continuous yarn is obtained by taking off. In addition, continuous yarn can be twisted.

Also known is a method in which nanofibers spun from a nozzle by a charge-induced spinning method are deposited on a collector to produce a ribbon-shaped nanofiber web, and the ribbon-shaped web is passed through an air twist device to produce a twisted yarn. (For example, refer to Patent Document 2).
JP-T-2006-507428 Special Table 2007-518891

  However, the technique described in Patent Document 1 is generated from each nozzle due to the spread of the deposition area while generating nanofibers directly from each nozzle and statically depositing them at positions corresponding to the nozzles on the collector. Nanofibers are entangled with each other to form a thin web, and the nanofibers are pulled out from one end of the web, and then the continuous nanofibers are pulled out to the other end of the web and converged into a continuous yarn. Therefore, while the deposition of nanofibers spun from each nozzle is static and almost equivalent, the deposition is close to the pulling side because the pulling action tends to concentrate in the deposition area close to the pulling side. There may be a difference in the extraction amount of the nanofiber between the deposition area and the distant deposition area. There is a problem that a non stable difficult to properly control the thickness and mechanical properties of continuous yarn by being drawn in a state that caused the difference in. Further, there is a problem that it is necessary to suppress the drawing speed to make the drawing action evenly extend to the deposition area far from the drawing side, and it is difficult to manufacture in large quantities.

  Moreover, although the technique of patent document 2 differs from patent document 1 by the point which twists with air and manufactures a twisted yarn, it shares the basic composition with patent document 1, and has the same problem, There is a problem that it is impossible to produce a yarn having a uniform shape and mechanical properties. Further, since the twisted yarn is produced by passing through the air twisting device, the stability of the action in the air twisting device also becomes a problem.

  The present invention solves the above-described conventional problems, and can stably produce a high-strength yarn having uniform morphology and mechanical properties made of nanofibers produced by a charge-induced spinning method. It is an object of the present invention to provide a method and apparatus for combining yarns.

  The nanofiber combining method of the present invention includes a core yarn supplying step of supplying a core yarn through a predetermined linear path, and a raw material solution flowing out and flowing out of at least one small hole rotating around the linear path. A nanofiber generation process in which an electric charge is charged and stretched by electrostatic explosion to generate a nanofiber, and a small hole with a linear path applied between a grounded electrode or a voltage of a polarity opposite to the charged charge of the raw material solution Rotating in synchronism with the small hole at a position almost opposite to, collecting the nanofibers collected by the electrode and entwining them with the core yarn, and collecting the nanofibers entangled with the core yarn together with the core yarn And a recovery step.

  The raw material solution includes various synthetic resin materials and high-molecular substances such as biopolymers such as nucleic acids and proteins (in the present invention, not only general high-molecular substances having a molecular weight of 10,000 or more, but a molecular weight of 1000 to A solution in which a quasi-polymer substance of 10,000 is also dissolved in a solvent is preferably applied. The polymer substance is not limited to a single substance, and may be a mixture of various polymer substances.

  According to the above configuration, while moving the core yarn along a predetermined linear path, the raw material solution is caused to flow out from a small hole rotating around the linear path, and the nanofiber is generated by the charge-induced spinning method. By making the nanofiber flow toward the electrode rotating in synchronization with the small hole at a position almost opposite to the small hole across the straight path, the generated nanofiber is linear or in the space of a small cross section around it. To entangle with the core yarn in order to get entangled with the core yarn while flowing toward the electrode with almost no disturbance, thereby stably producing a high-strength yarn with uniform morphology and mechanical properties composed of nanofibers Can do.

  In addition, in the nanofiber generation process, if the raw material solution is caused to flow out from a plurality of small holes arranged closer to each other than the distance between the small holes and the straight path, the above-mentioned effects are impaired. In addition, the productivity of the yarn can be improved by increasing the production amount of the nanofiber.

  In addition, it is preferable to adjust and set the raw material solution outflow direction of the small hole and the position of the electrode so that the nanofibers that are generated and collected by the electrode and flow in the joining step involve the core yarn. By carrying out like this, the effect | action in which the produced | generated nanofiber is entangled with a core yarn can be acquired reliably and stably.

  In addition, when the core yarn is rotated in the direction opposite to the direction of rotation of the small hole in the synthesizing step, the nanofibers are tightly wound by the core yarn, so that a higher strength yarn can be manufactured.

  The nanofiber synthesizing device of the present invention has a core yarn supplying means for supplying the core yarn through a predetermined linear path, and at least one small hole rotating around the linear path, and the raw material solution flows out from the small hole. And a nanofiber generating means for charging the flowing raw material solution with a charge, an electrode which is grounded or applied with a voltage of a polarity opposite to the charged charge of the raw material solution, and the electrode is substantially opposite to the small hole with a straight path interposed An electrode rotating means for rotating in synchronization with the small hole at the position on the side and a collecting means for collecting the core yarn entangled with the nanofiber are provided.

  According to this configuration, a nanofiber is generated from a small hole that rotates around a straight path in the nanofiber generating means, and the nanofiber is substantially opposite to the straight path by an electrode that rotates in synchronization with the small hole by the electrode rotating means. It is possible to produce a yarn by entwining nanofibers with a core yarn that is sucked on the side and moving along a straight path by the core yarn supply means, and performing the above-described nanofiber combination method, It is possible to stably produce a yarn that is strong and has uniform morphology and mechanical properties.

  Further, the distance in the longitudinal direction of the straight path between the small hole and the electrode is preferably set to 1 to 10 times the distance between the small hole and the straight path. Between the small hole and the electrode, it is necessary to provide a distance (for example, about 100 to 1000 mm) necessary for generating a nanofiber in which the raw material solution flowing out from the small hole is drawn by the charge induction spinning method. On the other hand, if the distance is taken in the radial direction, the winding angle with respect to the core yarn becomes close to 90 degrees, and it becomes difficult to secure the tensile strength of the yarn, and the direction in which the nanofibers are orthogonal to the direction of gravity action Since the fluid flows for a long distance, the flow state becomes unstable and the winding state may be non-uniform. On the other hand, if the distance in the longitudinal direction of the straight path is increased and the radial distance is too small, the wrapping angle with respect to the core yarn is reduced, and the degree of entanglement of the nanofiber with respect to the core yarn is reduced, thereby functioning as a thread. May be damaged, and the nanofiber and the core yarn that are being produced may interfere with each other. Therefore, it is preferable to set the distance as described above.

  In addition, the small holes of the nanofiber generating means can be arranged on the side of the electrode arrangement side of the rotating body rotating around the straight path, or on the outer peripheral surface or the inner peripheral surface, and the composition, concentration, outflow amount of the raw material solution It is preferable to select an optimum one according to various manufacturing conditions such as the arrangement position and rotation speed of the small holes, the arrangement position of the electrodes, and the moving speed of the core yarn.

  Further, when the small holes of the nanofiber generating means are constituted by a plurality of small holes arranged at a short distance from each other compared to the distance between the small holes and the linear path, the nanofiber can be manufactured without impairing the above-described effects. The amount can be increased to improve yarn productivity.

  In addition, when a core yarn rotating means for rotating the core yarn in the direction opposite to the rotation direction of the small hole is provided, the nanofibers are tightly wound by the core yarn, so that a higher strength yarn can be manufactured.

  Moreover, it is preferable that the distance between the electrode and the straight path is set to 50 mm or less because nanofibers that are sucked and flowed toward the electrode can be reliably entangled with the core yarn.

  According to the nanofiber combination method and apparatus of the present invention, a nanofiber is generated from a small hole rotating around a straight path, and the nanofiber is substantially opposite to the straight path by an electrode rotating in synchronization with the small hole. To produce a yarn with high strength and uniform morphology and mechanical properties by nanofibers entangled with a core yarn that is collected in a straight path and manufactured. Can do.

  Hereinafter, each embodiment of the nanofiber combination method and apparatus of the present invention will be described with reference to FIGS.

(First embodiment)
1st Embodiment of the nanofiber spinning device of this invention is described with reference to FIGS.

  First, the nanofiber spinning method in this embodiment will be described with reference to FIGS. 1 and 2. In FIG. 1, the nozzle member 4 having the small hole 3 is rotated around the linear path 2 as indicated by an arrow b while the core yarn 1 is supplied and moved through the predetermined linear path 2 as indicated by an arrow a. Then, the nanofiber material solution is charged and discharged from the small hole 3, and the electrode 5 for sucking the generated nanofiber 7 is placed at the position opposite to the small hole and 3 across the straight path 2. It is rotated in synchronism with the small hole 3 as shown in c. In order to charge the raw material solution flowing out from the small hole 3 and suck the nanofibers 7 with the electrode 5, in this embodiment, the nozzle member 4 is grounded and the high voltage generating means 6 is connected to the electrode 5 with 1 kV to 100 kV. A positive (or negative, positive in the illustrated example) high voltage of 10 kV to 100 kV is preferably applied. Thereby, an electric field is generated between the nozzle member 4 and the electrode 5, and the raw material solution flowing out from the small hole 3 is charged with a negative (or positive) charge, and the negatively (or positively charged) nanofiber 7 is It is attracted to the electrode 5 to which a high voltage of reverse polarity is applied. In addition, a negative (or positive) high voltage is applied to the nozzle member 4 by a high voltage generating means (not shown) so that the raw material solution and the nanofiber flowing out are charged with a negative (or positive) charge. In this case, the electrode 5 may be grounded, or a positive (or negative) high voltage may be applied to the electrode 5 by the high voltage generating means 6.

  According to this configuration, the charged raw material solution flows out from the small hole 3 that rotates around the linear path 2 while the core yarn 1 is moving along the predetermined linear path 2. The nanofibers 7 are generated by the induction spinning method, and the generated nanofibers 7 are rotated on the electrode 5 rotating in synchronism with the small holes 3 at a position substantially opposite to the small holes 3 across the straight path 2. It flows in the space of a small cross-section around the line or its surroundings with little disturbance. Thus, the nanofibers 7 flowing toward the electrode 5 are entangled with the core yarn 1 at a position intersecting the core yarn 1 by the rotation of the small hole 3 and the electrode 5, so that the nanofiber 7 is regularly wound around the core yarn 1, thereby A high-strength yarn 8 composed of nanofibers 7 with uniform morphology and mechanical properties is stably produced.

  As the core yarn 1, the kind of fiber is not limited, and natural fibers such as cotton and synthetic fibers such as nylon can be exemplified. Although it is preferable to use a monofilament having a wire diameter of 1 μm or less, a multifilament in which a plurality of fibers are bundled can be used. The diameter of the fiber at that time is not particularly limited, but a twisted yarn composed of fibers of 500 nm or less can be used.

  As the raw material solution, a solution obtained by dissolving a polymer substance in a solvent is suitable. Examples of the polymer substance include polypropylene, polyethylene, polystyrene, polyethylene oxide, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, poly-m-phenylene terephthalate, poly-p-phenylene isophthalate, polyvinylidene fluoride, and polyvinylidene fluoride. Hexafluoropropylene copolymer, polyvinyl chloride, polyvinylidene chloride-acrylate copolymer, polyacrylonitrile, polyacrylonitrile-methacrylate copolymer, polycarbonate, polyarylate, polyester carbonate, nylon, aramid, polycaprolactone, polylactic acid, polylactic acid Glycolic acid, collagen, polyhydroxybutyric acid, polyvinyl acetate, polypeptide, etc. can be exemplified as suitable ones And even can be exemplified such as biopolymers such as nucleic acids or proteins, at least one selected from these are used, but the invention is not particularly limited thereto.

  Examples of the solvent that can be used include methanol, ethanol, 1-propanol, 2-propanol, hexafluoroisopropanol, tetraethylene glycol, triethylene glycol, dibenzyl alcohol, 1,3-dioxolane, 1,4-dioxane, methyl ethyl ketone, Methyl isobutyl ketone, methyl n-hexyl ketone, methyl n-propyl ketone, diisopropyl ketone, diisobutyl ketone, acetone, hexafluoroacetone, phenol, formic acid, methyl formate, ethyl formate, propyl formate, methyl benzoate, ethyl benzoate , Propyl benzoate, methyl acetate, ethyl acetate, propyl acetate, dimethyl phthalate, diethyl phthalate, dipropyl phthalate, methyl chloride, ethyl chloride, methylene chloride, chloroform, o Chlorotoluene, p-chlorotoluene, carbon tetrachloride, 1,1-dichloroethane, 1,2-dichloroethane, trichloroethane, dichloropropane, dibromoethane, dibromopropane, methyl bromide, ethyl bromide, propyl bromide, acetic acid, benzene , Toluene, hexane, cyclohexane, cyclohexanone, cyclopentane, o-xylene, p-xylene, m-xylene, acetonitrile, tetrahydrofuran, N, N-dimethylformamide, pyridine, water, etc., and at least one selected from these Although used, it is not particularly limited to these. The proportion of the solvent in the raw material solution is preferably about 60% to about 98%, and is appropriately determined according to the type of the polymer substance to be used, the type of the solvent, the diameter of the produced fiber, and the like.

  In the illustrated example of FIG. 1, as shown in FIG. 1B, the direction of the small hole 3 of the nozzle member 4 is directed to the straight path 2, and the small hole 3 and the electrode 5 are substantially diametrically about the straight path 2. In order to stably entangle the nanofiber 7 that is generated by flowing out from the small hole 3 and sucked toward the electrode 5 with the core yarn 1, for example, FIG. In particular, as shown in FIG. 2 (b), the nozzle member 4 is disposed to be inclined backward in the rotational direction by an angle α with respect to the diametrical center line intersecting the linear path 2, and the electrode 5 is disposed at the center. By disposing the nanofiber 7 in the state where the small hole 3 and the electrode 5 are not rotating by being arranged at an angle β with respect to the line in the rotation direction rear side, the nanofiber 7 flows as shown by a virtual line. 3 and the flow of the electrode 5 as indicated by the solid line as the electrode 5 rotates. It is preferable to ensure that the moving nanofibers 7 are reliably entangled with the core yarn 1 and the generated nanofibers 7 are entangled with the core yarn 1 reliably and stably.

  Further, the core yarn 1 may be rotated in the direction opposite to the rotation direction of the small hole 3 (arrow b direction) as indicated by an arrow d in FIG. Then, although the configuration is somewhat complicated, since the nanofibers 7 are tightly wound around the core yarn 1, a higher strength yarn can be manufactured, which is preferable.

  Next, a more specific configuration will be described with reference to FIGS. 3 to 5, reference numeral 10 denotes a nanofiber spinning device, which includes a spinning head 11 that generates nanofibers 7, a rotating electrode unit 12, a core yarn supplying unit 13, and a collecting unit 14. .

  A spinning head 11 as a nanofiber generating means is provided with a nozzle member 4 having a small hole 3 at the tip at one place on the lower surface of a cylindrical container-like rotating body 15 rotatably supported around a vertical axis. It is configured. A lower end portion of the upper rotating cylinder 16 having electrical insulation is integrally fixed to the upper wall of the rotating body 15, and an intermediate portion of the upper rotating cylinder 16 is interposed at the upper support frame 17 via a bearing 18. While being rotatably supported, the upper part of the upper rotary cylinder 16 is connected to a rotating means 19. The rotating body 15 or at least the nozzle member 4 has conductivity, and the nozzle member 4 is electrically grounded via a conductive member 16 a provided on the upper rotating cylinder 16 and a bearing 18. Instead of forming the small hole 3 with the nozzle member 4, the small hole 3 may be formed directly in the rotating body 15. The rotating means 19 includes a driven pulley 19a fixed to the outer periphery of the upper rotating cylinder 16, a motor 19d installed on the upper support frame 17, a drive pulley 19c fixed to the output shaft of the motor 19d, a pulley 19a, The belt 19b is wound between 19c, and the motor 19d is configured to rotate the small hole 3 via the rotating body 15. The rotation speed of the small hole 3 is set to several hundred to 10,000 rpm.

  The upper part of the inner cylindrical wall 20 that forms a through-opening at the center of the rotator 15 is opened over the entire circumference, and the raw material solution is supplied to the annular housing space 20 a between the outer peripheral wall of the rotator 15 and the inner cylindrical wall 20. The raw material solution 21 supplied by the means 22 is accommodated and flows out from the small hole 3 through the nozzle member 4. The raw material solution supply means 22 takes out the raw material solution 21 in the storage container 23 with the supply pump 24, penetrates the upper rotary cylinder 16, and is L-shaped at the tip of the solution supply pipe 25 inserted and arranged in the rotary body 15. The raw material solution 21 is supplied from the bent portion 25a into the annular housing space 20a. In the illustrated example, the raw material solution 21 is caused to flow out from the small hole 3 by the action of the gravity acting on the raw material solution 21, the centrifugal force due to the rotation of the rotating body 15, and the electric field between the small hole 3 and the electrode 5. As a configuration capable of pressurizing the space 20a, the raw material solution 21 may be pushed out by pressure and allowed to flow out.

  The rotating electrode portion 12 is provided with a short electrode 5 whose upper end portion is formed in a substantially hemispherical shape at one place on the upper surface of the ring-shaped conductive rotating plate 26. The rotating plate 26 has electrical insulation. The lower rotary cylinder 29 is integrally fixed to the upper end of the lower rotary cylinder 29, the intermediate part of the lower rotary cylinder 29 is rotatably supported by the lower support frame 27 via the bearing 28, and the lower part of the lower rotary cylinder 29 is the rotation driving means. 30. A high voltage generated by the high voltage generating means 6 is applied to the electrode 5 via a conductive member 29 a provided on the rotating plate 26 and the lower rotating cylinder 29 and a bearing 28. The rotation driving means 30 includes a driven pulley 30a fixed to the outer periphery of the lower rotating cylinder 29, a motor 30d installed on the lower support frame 27, a driving pulley 30c fixed to the output shaft of the motor 30d, and a pulley 30a. And 30c. The electrode 30 is configured to be driven to rotate by the motor 30d via the rotating plate 26. The electrode 5 is rotationally driven so as to rotate in synchronization with the small hole 3. The electrode 5 is preferably a hemispherical shape having a radius of about several millimeters to 10 mm or a shape similar to that of the electrode 5 and having no sharp portion. This is because if there is a pointed portion, an ion wind is generated from the portion, which causes abnormal discharge.

  The core yarn supply means 13 is disposed on the upper support frame 17, a core yarn supply reel 31 that supplies the core yarn 1 at a predetermined speed, and a guide roller that positions the supply position of the core yarn 1 at the upper end of the linear path 2. 32. The collecting means 14 is disposed on the lower support frame 27, and a yarn take-up reel 33 that winds and collects the yarn 8 produced by winding the nanofiber 7 around the core yarn 1 and the lower end of the linear path 2. It is constituted by a guide roller 34 for positioning and taking out the manufactured yarn 8 from the straight path 2 to the side. Thus, the linear path 2 is set between the guide rollers 32 and 34, and the upper rotating cylinder 16, the rotating body 15, and the lower rotating cylinder 29 are in the same axial state with respect to the linear path 2. It is arranged like this. In order to rotate the core yarn 1 as shown by an arrow d in FIG. 2B, a core yarn supplying means 13 and a collecting means 14, or means for rotating at least the collecting means 14 around the linear path 2 as a rotation center is provided. Can be implemented.

  The arrangement relationship among the straight path 2, the small hole 3, and the electrode 5 will be described with reference to FIG. The distance L1 in the radial direction between the straight path 2 and the electrode 5 is preferably set to 50 mm or less in order to surely entangle the nanofiber 7 sucked and flowing toward the electrode 5 with the core yarn 1. However, depending on the direction of the small hole 3 and the arrangement position, it may be better to set it. The radial distance L2 between the straight path 2 and the small hole 3 is not particularly limited, but is set in correlation with the longitudinal distance L3 of the straight path 2 between the small hole 3 and the electrode 5. That is, it is necessary to secure a distance (for example, about 100 to 1000 mm) necessary for generating nanofibers between the small hole 3 and the electrode 5, and then the distance L3 is set to 1 to 10 times the distance L2. It is preferable to do this. When the distance L2 is increased and the distance L3 is decreased, the wrapping angle of the nanofiber 7 around the core yarn 1 becomes close to 90 degrees, and it becomes difficult to ensure the tensile strength of the yarn 8, and the nanofiber 7 Since it flows for a long distance in the direction perpendicular to the direction of gravity, the flow state becomes unstable and the winding state may become uneven. On the other hand, if the distance L3 is increased and the distance L2 is decreased too much, the core The wrapping angle of the nanofiber 7 with respect to the yarn 1 is reduced, the degree of entanglement of the nanofiber 7 with respect to the core yarn 1 is reduced, the function as the yarn 8 may be impaired, and the nanofiber 7 being generated is This is because there is a possibility of interference with the yarn 1.

  Next, the control configuration will be described with reference to FIG. In FIG. 6, the rotating means 19 for rotating the rotating body 15 at a predetermined rotational speed, and the electrode 5 are synchronized with the small hole 3 of the rotating body 15 and the relative position in the rotating direction positioned at a predetermined position and maintaining the positioning state. The control unit 41 includes a rotation driving unit 30 that rotates the rotation unit 30, a high voltage generation unit 6 that applies a high voltage to the electrode 5, and a supply pump 24 of a raw material solution supply unit 22 that supplies the raw material solution 21 to the rotating body 15. Is configured to control. The control unit 41 controls the operation based on the operation program stored in the storage unit 42 and the various data input and stored from the operation unit 43 according to the work command from the operation unit 43, and the operation state and various types The data is displayed on the display unit 44.

  According to the present embodiment, while moving the core yarn 1 along the predetermined linear path 2, the raw material solution 21 is caused to flow out from the small hole 3 rotating around the linear path 2, and the nanofibers 7 are formed by the charge induction spinning method. The generated nanofiber 7 is made to flow toward the electrode 5 rotating in synchronization with the small hole 3 at a position substantially opposite to the small hole 3 with the straight path 2 interposed therebetween. The nanofibers 7 flow toward the electrode 5 with little disturbance in the linear or surrounding space of the small cross section, and the nanofibers 7 that have flowed along with the synchronous rotation of the small hole 3 and the electrode 5 are core yarns. The yarn 8 is entangled with the core yarn 1 and regularly wound around the core yarn 1, thereby stably producing the yarn 8 composed of nanofibers 7 wound around the core yarn 1 and having uniform shape and mechanical properties. It can be.

  As a specific numerical example, the distance L1 is 50 mm, the distance L2 is 100 mm, the distance L3 is 300 mm, the rotational speed T1 of the rotating body 15 (small hole 3), and the rotational speed T2 of the rotating plate 26 (electrode 5) are both The rotation speed is set to 3000 rpm, the rotating body 15 is grounded, a voltage of 50 kV is applied to the electrode 5 by the high voltage generating means 6, and the core yarn 1 is supplied to the linear path 2 at a speed of 10 mm / sec. A high-strength yarn 8 in which the nanofibers 7 were regularly wound and tightly entangled with the core yarn 1 could be produced. The moving speed of the core yarn 1 varies depending on the amount of the nanofiber 7 to be generated and the amount wound around the core yarn 1.

(Second Embodiment)
Next, a second embodiment of the nanofiber spinning device of the present invention will be described with reference to FIG. In the following description of the embodiment, the same components as those in the preceding embodiment are denoted by the same reference numerals, description thereof is omitted, and only differences will be mainly described.

  In the said 1st Embodiment, although the single nozzle member 4 was arrange | positioned on the lower surface of the rotary body 15, and the nanofiber 7 was produced | generated from the single small hole 3, the example was shown, Is configured such that a plurality of nozzle members 4 are arranged close to each other on the lower surface of the rotating body 15, and nanofibers 7 are generated from the small holes 3. These small holes 3 are disposed within a range of distances smaller than the distance L2 between the small holes 3 and the straight path 2. 7A and 7B, the plurality of small holes 3 may be arranged in the radial direction as shown in FIG. 7C even if they are arranged in the radial direction at the same position in the circumferential direction. They may be arranged in the circumferential direction at the same position, or may be further distributed in the circumferential direction and radial direction.

  According to this embodiment, since the nanofibers 7 are generated from the plurality of small holes 3, the production amount of the nanofibers 7 can be increased, and the plurality of small holes 3 are arranged close to each other. Since the operational effect that the nanofibers 7 can be regularly wound around the yarn 1 is not impaired, the productivity of the yarn 8 can be improved.

(Third embodiment)
Next, a third embodiment of the nanofiber spinning device of the present invention will be described with reference to FIGS.

  In the first embodiment, the example in which the nozzle member 4 and its small hole 3 are arranged on the lower surface of the rotating body 15 is shown. However, in the present embodiment, as shown in FIG. The member 4 and its small hole 3 are arranged. Even if the small holes 3 are arranged on the outer periphery of the rotating body 15 in this way, as shown in FIG. 9, the small holes 3 and the electrodes 5 are arranged on the opposite side of the linear path 2 and are rotated synchronously. The nanofibers 7 that flow from the small hole 3 toward the electrode 5 as the electrode 5 rotates can be entangled around the core yarn 1 and regularly wound, so that a high-strength and uniform yarn 8 can be manufactured. . As described in the second embodiment, a plurality of nozzle members 4 may be provided close to the outer peripheral surface of the rotating body 15.

(Fourth embodiment)
Next, a fourth embodiment of the nanofiber spinning device of the present invention will be described with reference to FIG.

  In the first embodiment, the example in which the nozzle member 4 and its small hole 3 are arranged on the lower surface of the rotating body 15 is shown. However, in this embodiment, as shown in FIG. A portion 15a is formed, and the nozzle member 4 and its small hole 3 are disposed on the tapered portion 15a obliquely downward and outward. Even in the configuration in which the small holes 3 are arranged in this manner, the nanofibers 7 are entangled with the core yarn 1 regularly by arranging the small holes 3 and the electrodes 5 on the opposite side of the linear path 2 and rotating them in the same manner as described above. It is possible to produce a high-strength and uniform yarn 8. As described in the second embodiment, a plurality of nozzle members 4 may be provided close to the outer peripheral surface of the rotating body 15.

(Fifth embodiment)
Next, a fifth embodiment of the nanofiber spinning device of the present invention will be described with reference to FIGS.

  In the said 1st Embodiment, although the example which has arrange | positioned the nozzle member 4 and its small hole 3 in the lower surface of the rotary body 15 was shown, in this embodiment, as shown to FIG. 11, FIG. The rotating body 15 is applied, and the nozzle member 4 and the small hole 3 thereof are disposed in the lower part of the inner peripheral surface of the rotating body 15 toward the obliquely downward inner side. Even in the configuration in which the small holes 3 are arranged in this manner, the nanofibers 7 are entangled with the core yarn 1 regularly by arranging the small holes 3 and the electrodes 5 on the opposite side of the linear path 2 and rotating them in the same manner as described above. It is possible to produce a high-strength and uniform yarn 8. In the case of the present embodiment, since the raw material solution 21 flows out to the inner peripheral side of the rotator 15, the inside of the rotator 15 is configured to be pressurized, and pressure is applied to the liquid surface of the raw material solution 21. It is preferable that the raw material solution 21 flows out of the small hole 3.

  Moreover, as shown in FIG. 12, not only the structure which has arrange | positioned the single nozzle member 4 and the small hole 3 in the internal peripheral surface of the rotary body 15, but as shown in FIG. It can also be set as the structure which has arrange | positioned the several nozzle member 4 and the small hole 3, and when it does so, the manufacturing amount of the nanofiber 7 can be increased and the productivity of the thread | yarn 8 can be improved.

  According to the nanofiber combination method and apparatus of the present invention, a nanofiber is generated from a small hole rotating around a straight path, and the nanofiber is substantially opposite to the straight path by an electrode rotating in synchronization with the small hole. To produce a yarn with high strength and uniform morphology and mechanical properties by nanofibers entangled with a core yarn that is collected in a straight path and manufactured. Therefore, it can be suitably used for producing a high-strength and uniform yarn made of nanofibers.

The basic composition of the nanofiber spinning method in the 1st embodiment of the present invention is shown, (a) is a front view and (b) is a top view. The other arrangement composition in the basic composition is shown, (a) is a front view and (b) is a top view. The longitudinal section front view showing the schematic structure of the nanofiber spinning device concerning the embodiment. The perspective view which shows schematic structure of the nanofiber spinning device. The perspective view which shows the arrangement configuration of the main components of the nanofiber spinning device. The block diagram which shows the control structure of the nanofiber spinning device. The nanofiber spinning device which concerns on the 2nd Embodiment of this invention is shown, (a) is a perspective view which shows a principal part structure, (b) is a bottom view of a rotary body, (c) is the rotation in another structural example. The bottom view of a body. The perspective view which shows schematic structure of the nanofiber spinning device which concerns on the 3rd Embodiment of this invention. FIG. 3 is a plan layout view of main components in the embodiment. The perspective view which shows schematic structure of the nanofiber spinning device which concerns on the 4th Embodiment of this invention. The perspective view which shows schematic structure of the nanofiber spinning device which concerns on the 5th Embodiment of this invention. The longitudinal front view which shows the principal part structure in the nanofiber spinning device. The longitudinal cross-sectional front view which shows the other principal part structure in the nanofiber spinning device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Core thread 2 Straight path 3 Small hole 4 Nozzle member 5 Electrode 6 High voltage generation means 7 Nanofiber 8 Yarn 10 Nanofiber combination apparatus 11 Spinning head (nanofiber generation means)
DESCRIPTION OF SYMBOLS 12 Rotating electrode part 13 Core thread supply means 14 Recovery means 15 Rotating body 19 Rotating means 21 Raw material solution 30 Rotation drive means

Claims (10)

  A core yarn supplying step for supplying the core yarn through a predetermined linear path, and the raw material solution is discharged from at least one small hole rotating around the linear path, and the discharged raw material solution is charged, and stretched by electrostatic explosion. The nanofiber generation process for generating nanofibers, and the grounded or applied electrode of a polarity opposite to the charged charge of the raw material solution is synchronized with the small hole at a position substantially opposite to the small hole across the straight path And spinning the collected nanofibers with an electrode to entangle them with the core yarn, and collecting the nanofibers entangled with the core yarn together with the core yarn. Nanofiber combination method.   2. The nanofiber is produced by causing the raw material solution to flow out from a plurality of small holes arranged at a short distance relative to the distance between the small hole and the straight path in the nanofiber generating step. Of nanofibers.   3. The flow direction of the raw material solution in the small hole and the position of the electrode are adjusted and set so that the nanofibers that are generated and collected by the electrode and flow in the compounding step involve the core yarn. The nanofiber combination method according to the description.   The nanofiber combination method according to any one of claims 1 to 3, wherein the core yarn is rotated in a direction opposite to the rotation direction of the small hole in the combination step.   A nanofiber having a core yarn supplying means for supplying a core yarn through a predetermined linear path and at least one small hole rotating around the linear path, and discharging the raw material solution from the small hole and charging the discharged raw material solution with electric charge The generation means, the electrode that is grounded or applied with a voltage of the opposite polarity to the charged charge of the raw material solution, and the electrode rotation that rotates the electrode in synchronization with the small hole at a position substantially opposite to the small hole across the straight path A nanofiber synthesizing apparatus comprising: means; and collecting means for collecting the core yarn in which the nanofiber is entangled.   6. The nanofiber spinning device according to claim 5, wherein the distance in the longitudinal direction of the linear path between the small hole and the electrode is set to 1 to 10 times the distance between the small hole and the linear path.   7. The nanofiber according to claim 5 or 6, wherein the small holes of the nanofiber generating means are arranged on the side surface on the electrode arrangement side of the rotating body rotating around the linear path, on the outer circumferential surface, or on the inner circumferential surface. Synthetic yarn device.   7. The nanofiber according to claim 5 or 6, wherein the small hole of the nanofiber generating means is composed of a plurality of small holes arranged close to each other as compared with a distance between the small hole and the straight path. Synthetic yarn device.   The nanofiber spinning device according to any one of claims 5 to 8, further comprising a core yarn rotating means for rotating the core yarn in a direction opposite to the rotation direction of the small hole.   The nanofiber spinning device according to any one of claims 5 to 9, wherein a distance between the electrode and the straight path is set to 50 mm or less.

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