KR20110108815A - Spinneret for manufacturing sea-island fiber - Google Patents

Abstract

The island-in-the-sea yarn comprising a lower portion plate having a detentional partial plate in which the island component supply passage is divided into a plurality of groups and a discharge port for collecting or partially discharging the polymer passing through the plurality of island component supplies. Manufacturing spinnerets are provided.
Even if the number of islands manufactured by the island is 500 or more, even if the number of islands do not occur in the central portion of the island islands. Therefore, since more than 500 islands can be arranged in one island island, the fineness of islands can be reduced, which is very advantageous for producing microfiber yarn, and it is possible to produce more than 500 ultrafine yarns in one island island. Can be saved.
Furthermore, since the number of discharge holes included in the lower metal plate is smaller than the number of the island component supply units, the island-in-the-sea yarn having 10000 or more island components can be produced.

Description

Spinneret for manufacturing sea island yarn {Spinneret for manufacturing sea-island fiber}

The present invention relates to a spinneret for manufacturing sea island yarns, and more particularly, to prevent island-in-the-sea joints of seaweed yarns that are spun even when the number of island portions increases, and for sea island yarn production that can dramatically increase the number of island components. It relates to spinnerets.

The island-in-the-sea yarn is a yarn having a cross-sectional structure in which island components are dispersed in the sea component.Since the sea component is eluted or dissolved in the post-processing process after spinning, only the island component remains, so waste of resin and use of a solvent to elute the sea component Although there is a problem of increased cost and environmental pollution due to the production of ultra-fine yarn that can not be obtained by the conventional microfiber manufacturing method is widely used as a yarn for manufacturing industrial materials such as artificial suede, filters, cleaning products.

The sea component in the conventional islands-in-the-sea yarn is a component that elutes or dissolves in the post-processing process after spinning, and the island component is a component that continues to form fibers even after the removal of the sea component. The process must be complicated, such as weight loss, brushing, dyeing, etc. Above all, since the fineness and uniformity of fine-grained fiber components are very important for stabilization of quality, Arrangement and composition are key factors in determining quality.

Therefore, in order to maximize the utilization of island components, island-in-the-sea yarns are manufactured by complex spinning them into islands-in-sea type using alkali-soluble polymers as sea components and fiber-forming polymers as island components. It is produced for the purpose of making fibers. In other words, after preparing sea island yarn, it is treated with an alkaline solution to elute the sea component, which is an alkali-soluble polymer, thereby producing an ultrafine fiber composed only of the island component. As described above, the method of manufacturing the ultrafine fibers from the island-in-the-sea yarn has the advantages of superior spinning and stretching operations and obtains finer fibers with finer fineness compared to the method of manufacturing the ultrafine fibers by direct spinning. In the processing step, a step of eluting and removing the sea component polymer with an organic solvent or the like is necessary. Since the quality of the final agent can be improved depending on the degree of fineness of the island component fibers, it is true that many researches and developments have been conducted to further refine the fineness of the island component fibers.

The conventionally commercialized technology is that the number of island component fibers is 37 or less, and the fineness of the finely divided island component fibers remains at 0.05 denier. Therefore, it may be necessary to develop a technology capable of manufacturing fineness of the island component fibers to 0.04 denier or less while expanding the number of island component fibers to 38 or more.

However, when the number of island components is 38 or more, the cross-sectional formation structure is very important, and the arrangement of island component fibers within the island-in-the-sea yarn cross section must be designed very precisely. Specifically, FIG. 1A is a cross-sectional view of the detention part partial plate of the spinneret for producing island-in-the-sea yarn for producing a conventional island-in-the-sea yarn. Specifically, the spinneret partial plate 1 of the spinneret for manufacturing island-in-the-sea yarns has a sea component supply unit for supplying the sea component polymer to the island component supply unit 2 to which the island component polymer is supplied and the outer peripheral surface of the island component supply unit 2 ( 3) consists of. Among them, the conductive component supply unit 2 typically has a plurality of conductive component supply paths 5 formed radially about a single spinning core 4, and according to the desired number of conductive components, The number can vary. The sea component supply path 6 is formed in the sea component supply unit 3 surrounding the outer periphery of the island component supply unit 2. In the depressor partial plate of the island-in-the-sea spinning yarn spinneret of FIG. 1A, when the island component and the sea component are injected through the respective supply passages, the sea component supplied to the sea component supply passage 6 in the inside of the spinneret is the island component supply unit ( 2) is introduced into the island component supply section (2) while filling the inside of the island component supply passage (5). Through this process it is possible to produce islands with a plurality of islands formed inside the sea component.

1B and 1C are cross-sectional views of a conventional island of the island seaweed (FIG. 331 shown in FIG. 1A) radiated through the spinneret of FIG. 1A described above. ) Are concentrically arranged and the cross section occupies 60 to 70% of the total cross-sectional area of the island-in-the-sea yarn. Figure 1c also has a concave portion 14 is arranged in a concentric circle around the radiation core 13 in the inside of the island, and the cross-sectional area occupied in the cross-sectional area of the total island-in-the-sea yarn is 70 to 80%. Such a cross-sectional structure is not abnormal when the number of drawing parts is small, but when the number of drawing parts is increased (about 300 or more) or when the cross-sectional area of the drawing parts is increased, adjacent to the spinning core 11 formed at the center of the islands. In the case of the drawing part, the density becomes large, and a phenomenon of agglomeration between the coating parts located around the spinning core occurs in the spinning process. In other words, as the number of islands of sea islands increases and the cross-sectional area increases, side effects (conjugation phenomenon) of the islands of the islands of the islands agglomerate to form agglomerates. From this point of view, it is not possible to secure stable formation of the cross-section of the island-in-the-sea yarns with 37 or less island-based fibers. This was desperately needed.

The present invention has been made to solve the above-described problems of the prior art, the first problem to be solved by the present invention is to prevent the aggregation of the islands even when the number of the islands significantly increase the sea island having color development It is to provide a spinneret for the island-in-the-sea yarn manufacturing that can be prepared.

The second problem to be solved by the present invention is to provide a spinneret for manufacturing island-in-the-sea yarns that can produce island-in-the-sea yarns that do not occur when applied to the luminance-enhanced film without agglomeration of the island portion.

The present invention to achieve the first object,

A island component supply unit including a island component supply path and injecting the island component polymer and

It is formed on the outer circumferential surface of the island component supply section and includes a sea component supply passage for injecting the sea component polymer.

In the spinnerette for producing island-in-the-sea yarn comprising a depressor partial plate for island-in-the-sea manufacturing, wherein the sea component injection unit is formed, wherein the island-based component supply path is divided into a plurality of groups within the island component supply unit, And a portion of the detention part partial plate including a plurality of sea component supply parts, and a polymer formed at a lower portion of the detention part partial plate and passing through the plurality of island component supply parts and the plurality of sea component supply parts, Provided is a spinneret for manufacturing island-in-the-sea yarns including a lower stopper plate on which one or more discharge holes are discharged.

According to a preferred embodiment of the present invention, the island component supply unit may be formed at least one sea component supply passage therein.

According to another preferred embodiment of the present invention, the island component supply passage may be grouped and arranged around two or more spinning cores.

According to another preferred embodiment of the present invention, the radiation core may be one radiation reference core in the center of the island component supply unit and a plurality of radiation peripheral cores may be arranged around the radiation core.

According to another preferred embodiment of the present invention, the separation distance between the radiation reference core and the plurality of radiation peripheral cores may be substantially the same or different.

According to another preferred embodiment of the present invention, the radial peripheral core may be 3 to 20 pieces.

According to another preferred embodiment of the present invention, the radial peripheral core may be 6 to 10.

According to another preferred embodiment of the present invention, 10 to 300 island component supply paths may be arranged for one radiation reference core or one radiation peripheral core.

According to another preferred embodiment of the present invention, a sea component supply path may be formed between the radiation reference core and the radiation peripheral core.

According to another preferred embodiment of the present invention, the number of island component supply paths included in one island component supply unit may be 38 to 1500.

According to another preferred embodiment of the present invention, the number of island component supply paths included in one island component supply unit may be 500 to 1500.

According to another preferred embodiment of the present invention, the number of island component supply paths included in one island component supply unit may be 1000 to 1500.

According to another preferred embodiment of the present invention, the number of the island component supply unit may be 2 to 20.

According to another preferred embodiment of the present invention, the number of the island component supply unit may be 5 to 15.

According to another preferred embodiment of the present invention, the number of island component supply paths included in the entire island component supply unit may be 10000 to 20,000.

According to another preferred embodiment of the present invention, the shape of the grouped islands supply path may be arranged in a circular, elliptical, polygonal or heteromorphic cross section.

According to another preferred embodiment of the present invention, the shapes of the grouped islands supply paths may be identical or different.

According to another preferred embodiment of the present invention, the spinning core may be arranged based on the center of the island component supply unit.

According to another preferred embodiment of the present invention, a sea component supply passage may be formed at the center of the island component supply unit.

According to another preferred embodiment of the present invention, the number of the spinning core may be 3 to 20.

According to another preferred embodiment of the present invention, the number of the spinning core may be 6 to 10.

According to another preferred embodiment of the present invention, a sea component supply path may be formed between the spinning cores.

According to another preferred embodiment of the present invention, the diameter of the island component supply unit may be 15 ~ 50mm.

According to another preferred embodiment of the present invention, the diameter of the island component supply passage may be 0.1 ~ 0.3mm.

According to another preferred embodiment of the present invention, the diameter of the sea component supply passage may be 0.2 ~ 2.0mm.

According to another preferred embodiment of the present invention, it may include 2 to 20 of the island component supply.

According to another preferred embodiment of the present invention, in the plurality of groups, the maximum value of the center distance between adjacent island component supply paths within the same group is greater than the maximum value of the center distance between adjacent island component supply paths between neighboring groups. Can be small.

In order to achieve the above-described second technical problem, the number of the ejection openings may be preferably smaller than the number of the island component supply units, more preferably, the number of the ejection openings may be less than half the number of the island component supply units, and Preferably, the number of the discharge holes may be one.

According to another preferred embodiment of the present invention, the lower stop plate may be formed with one or more flow paths for guiding the island component polymer passed through the island component supply portion and the sea component polymer passed through the sea component supply portion to the discharge port. have.

According to another preferred embodiment of the present invention, the discharge port may be formed in an area where the flow path and the flow path intersect.

According to another preferred embodiment of the present invention, the spinning core may be formed in the group to which the spinning core belongs.

The terms used herein are briefly described.

Unless stated otherwise, the term 'spinning core' refers to the case where the island component supply paths are grouped (partitioned) and arranged around a certain point in the inner part of the spinneret. ) It means a certain point that is the center.

The term 'radiation reference core' refers to a radiation core which is a center when a plurality of radiation cores exist and the other radiation cores are arranged around one radiation core, and the 'radiation peripheral core' refers to one radiation core. It means the remaining spinning core to be arranged.

The "conductive component supply paths are grouped and arranged" means that the plurality of conductive component supply paths are partitioned and arranged in a uniform shape with respect to one spinning core, for example, inside the spinneret. In the case of two spinning cores, the island component supply paths are arranged in a predetermined shape around each spinning core, and thus, the island parts are divided into two groups within the island-in-the-sea yarn radiated therethrough.

'Photochromic fiber' refers to a fiber whose color is expressed by the interference of light due to the structural / optical design of the fiber, rather than being colored by the physical / chemical combination of a material having a color such as a dye or a pigment. Means.

'Fiber has birefringence' means that when light is irradiated on a fiber having a different refractive index according to the direction, the light incident on the polymer is refracted by two lights having different directions.

'Isotropic' means that when light passes through an object, the refractive index is constant regardless of the direction.

'Anisotropy' means that the optical properties of an object are different depending on the direction of light. Anisotropic objects have birefringence and correspond to isotropy.

'Light modulation' means that the irradiated light is reflected, refracted, scattered, or the intensity of the light, the period of the wave, or the nature of the light is changed.

The term 'morning' refers to a phenomenon in which a part of filaments are cut when several filaments are gathered together to form a single thread.

The island-in-the-sea yarn manufactured through the spinneret for manufacturing the island-in-the-sea yarn according to the present invention does not cause agglomeration of the island portion in the central portion of the island-in-the-sea island even when the island portion is divided into two or more groups. . Therefore, since more than 500 islands can be arranged in one island island, the fineness of islands can be reduced, which is very advantageous for producing microfiber yarn, and it is possible to produce more than 500 ultrafine yarns in one island island. Can be saved.

In addition, the island-in-the-sea yarn manufactured through the spinneret for manufacturing the island-in-the-sea yarn of the present invention expresses a specific color according to the sea island ratio and fiber diameter without adding a compound causing color development, such as dye due to the excellent light modulation effect as a photochromic fiber. Can be utilized. The photochromic fiber of the present invention may be colored in various colors depending on the intensity, position and viewing angle of light.

Furthermore, when the island-in-the-sea yarn manufactured through the spinneret for manufacturing the island-in-the-sea yarn of the present invention has different optical properties between the island portion and the sea portion, an optical modulation interface is formed at the interface between the island portion and the sea portion. Maximize and even if the number of parts do not increase the number of parts. Therefore, the area of the light modulation interface can be maximized as compared to the conventional islands-and-seas yarn having one spinning core, so that the light modulation effect is significantly increased. Therefore, the luminance-enhanced film including the island-in-the-sea yarn of the present invention has an excellent light modulation effect, so that the luminance is remarkably improved as compared with the case of using ordinary birefringent fibers or island-in-the-sea yarns. Furthermore, in the case of producing sea island yarns having a number of drawing portions of 10000 or more by discharging the polymers supplied through a plurality of island component supply units and sea component supply units through a small number of ejection openings, the occurrence of hair phenomena may occur when used in a luminance-enhanced film. You can prevent it.

Figure 1a is a top view of the portion of the upper portion of the spinneret in the spinnerets for manufacturing conventional islands, Figure 1b and Figure 1c is an electron micrograph of the conventional sea island cross-section prepared through this.
Figure 2a is a top view of the portion of the upper portion of the spinneret for spin island manufacturing spinneret for manufacturing according to a preferred embodiment of the present invention, Figure 2b is a cross-sectional view of the group-shaped islands produced by this.
Figure 3a is a top view of the portion of the upper portion of the spinneret for spin island manufacturing spinneret for manufacturing according to another preferred embodiment of the present invention, Figure 3b is an electron micrograph of the group-shaped islands produced by this.
Figure 4a is a top view of the upper portion of the detention part of the spinneret for producing sea island yarn according to another embodiment of the present invention, Figure 4b is a cross-sectional view of the group-shaped sea island yarn manufactured through this.
Figure 5 is a top view of the upper portion of the detention part of the spinneret for producing sea islands according to another preferred embodiment of the present invention.
Figure 6 is a photograph of the lower holding plate of the spinneret for manufacturing conventional islands.
7 is an enlarged photograph of a fabric used in a luminance-enhanced film including islands-in-the-sea yarns.
8 is a photograph of the lower holding plate of the spinneret for producing island-in-the-sea yarn manufacturing according to another preferred embodiment of the present invention, FIG. 9 is an electron micrograph of the island-in-the-sea yarn manufactured therefrom, and FIG. 10 includes the island-in-the-sea yarn of FIG. 9. This is an enlarged photograph of the fabric used for the luminance-enhanced film.
FIG. 11 is a cross-sectional view illustrating a path of light incident on a birefringent island-in-the-sea yarn manufactured through the spinneret of the present invention.

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

As described above, the island-in-the-sea yarn manufactured using the spinneret for manufacturing the island-in-the-sea yarn is arranged in a concentric shape around a single spinning core or randomly arranged without any spinning core. The structure is not abnormal when the number of drawing parts is small, but when the number of drawing parts is increased (about 300 or more), the density of the drawing parts adjacent to the spinning core formed at the center of the island is increased, Agglomeration occurs between the coating parts located around the spinning core. In other words, as the number of islands of islands in the sea island increases, there is a side effect that the islands of the island portion of the islands agglomerate to form a mass.

Accordingly, the spinneret for manufacturing island-in-the-sea yarn according to an embodiment of the present invention includes a island component supply path and is formed on an outer circumferential surface of the island component supply unit for injecting the island component polymer and injects the sea component polymer. In the spinnerette for producing island-in-the-sea yarn comprising a depressor partial plate for sea-in-the-sea production manufactured by a sea component injection unit including a furnace, the island-in-the-art supply path is partitioned into a plurality of groups within the island-component supply unit, Some or all of the polymer part formed in the lower part of the detention part plate including the powder supply part and the plurality of sea component supply parts, and passed through the plurality of island component supply parts and the plurality of sea component supply parts. It provides a spinneret for manufacturing island-in-the-sea yarn comprising a lower stopper plate having one or more discharge holes for collecting and discharging. Was prevented agreement occurs. More preferably, the island component supply path is grouped and arranged around two or more spinning cores to seek to solve the above-mentioned problems. This prevents excessive accumulation of islands in one spinning core and forms more than 500 islands inside one island, producing ultra-fine yarn and simultaneously producing hundreds of ultrafine yarns in one island. Significantly reduced.

First, the detention part partial plate formed in the upper part of the spinneret of the present invention will be described. Figure 2a is a top view of a portion of the detentional partial plate of the spinneret for producing island-in-the-sea yarn manufacturing according to a preferred embodiment of the present invention, the detentional partial plate 200 is the island component supply unit 210 for injecting the island component polymer and A wrapper is composed of a sea component supply unit 220 for injecting a sea component polymer. The island component supply unit 210 has a plurality of island component supply paths 215 grouped around four spinning cores 211, 212, 213, and 214 to form a group. Although circular is shown as a shape, it is not limited to this, and an oval, polygonal and other cross-section is possible. Also, the island component supply unit 210 may have a sea component supply path 216 formed therein, and the sea component supply path 216 is not limited to the number and location of the sea component supply path 216. It is advantageous to form a group and a group consisting of two groups. Meanwhile, one or more sea component supply paths 216 formed inside the island component supply unit 210 may be formed according to circumstances. In the sea component supply unit 220 surrounding the outer circumferential surface of the island component supply unit 210, sea component supply paths 221, 222, 223, and 224 are formed in the same manner as in the spinnerets for manufacturing sea islands. The supply paths 221, 222, 223, and 224 are not limited in number, but may be preferably formed by the number of spinning cores 211, 212, 213, and 214.

FIG. 2B is a cross-sectional view of a length of the island-in-the-sea yarn manufactured through the spinneret including the capped partial plate of FIG. 2A, wherein four spinning cores are formed in the inside of the island-in-the-sea yarn 250, and spinning cores 251 and 252. 253, 256, 257, 258 are grouped and arranged around. In other words, a plurality of drawing portions 255, 256, 257, and 258 are partitioned and arranged around each of the radiating cores 251, 252, 253, and 254. Minutes form a group and exist. In this case, the cross-sectional shape of each group of the drawing portions 255, 256, 257, and 258 arranged around the radiating cores 251, 252, 253, and 254 is composed of the drawing component supply path in the detention part partial plate of FIG. Although the cross-sectional shape of the group is circular, the arrangement of the edges of the cross-section may be disturbed due to die swelling in the spinning process of sea island. Therefore, the cross-sectional shape of the group of the island portion of the radiated islands is not limited in kind, such as semi-circular, fan-shaped, circular, elliptical, polygonal and heteromorphic cross section, the cross-sectional shape of each group may be the same or different. On the other hand, in the drawings of the present disclosure, the radiation core is shown in bold as a black point, but this is only an expression for clearly showing the radiation core, which means a point that is the center of the actual group, the point is even part It may be or may be partial, but it must be located within the group. Furthermore, the blanks inside the islands may actually be filled with islands or only sea parts.

According to one preferred embodiment of the present invention, one radiation reference core may be positioned at the center of the island component supply unit, and a plurality of radiation peripheral cores may be disposed around the same, and in the following, except for the overlapping substrates Only the technical part will be described. 3A is a top view of the detention part partial plate 300 of the spinneret for producing sea island yarn according to the present invention. Specifically, the island component supply unit 310 has a island component centered on one radiation reference core 311 in the center thereof. A supply path forms a group and seven radially peripheral cores 312, 313, 314, 315, 316, 317, and 318 are disposed at the outer side of the radiation reference core 311. Sea component supply paths 319, 320, 321, 322, 323, 324, and 325 are formed between the radiation reference core 311 and the respective radiation peripheral cores 312, 313, 314, 315, 316, 317, and 318. Is formed. The sea component supply unit 330 surrounding the outer circumferential surface of the island component supply unit 310 has a sea component supply path 331, 332, 333, 334, 335, 336, 337 as in the spinneret plate for spinnerets for manufacturing sea islands. ) Is formed, but is not limited thereto. 3B is an electron micrograph of the island-in-the-sea yarn radiated through the spinneret including the detentional partial plate of FIG. 3A, and a single radiation reference core 351 is formed at the center of the island of the islands and is centered on the radiation reference core 351. Seven radial peripheral cores (352 to 358) are formed. In this case, preferably, the separation distance between the radiation reference core 351 and the plurality of radiation peripheral cores 352 to 358 may be substantially identical or not coincident. Substantially coinciding the separation distance between the core 351 and the plurality of radiation peripheral cores 352 to 358 is effective in minimizing the effect of aggregation of the islands. On the other hand, when the cross-sectional shape is elliptical, the radiation reference core 351 so that the separation distance between the radiation reference core 351 and the plurality of radiation peripheral cores 352 to 358 is long in the long axis direction and short in the short axis direction of the ellipse. ) And a plurality of radiation peripheral cores 352 to 358 may be formed.

On the other hand, the number of the radiation peripheral core is preferably 3 to 20 may be formed, more preferably 6 to 10 may be formed, as shown in Figure 3b is arranged based on one radiation reference core 351 The effect is most effective when the number of the number of radially peripheral cores 352 to 358 is 6 to 8, and the number of islands grouped to the radial reference core 351 and the radially peripheral cores 352 to 358 is 100 to 200. great.

According to two preferred embodiments of the present invention, the spinning core may be arranged based on the center of the island component supply unit, and more preferably, the spinning core may not be formed at the center of the island component supply unit. Hereinafter, only characteristic features of the above two embodiments will be described except for overlapping descriptions. Specifically, FIG. 4A is a top view of the upper portion of the detention part of the spinneret for producing sea island yarn according to the second preferred embodiment of the present invention. Specifically, the island component supply unit 410 has a center 430 of the island component supply unit 410. Three radiation cores 411, 412, 413 are formed on the basis of the three radiation cores 411, 412, 413, and eight radiation cores 414, 415, 416, 417, 418, 419, respectively. 420 and 421 are formed. At this time, three radiation cores 411, 412, 413 formed therein and eight radiation cores 414, 415, 416, 417, 418 formed outside the three radiation cores 411, 412, 413. , 419, 420, and 421 are all arranged based on the center 430 of the island-in-the-sea yarn. In this case, the number of the spinning cores is preferably 3 to 20, more preferably 6 to 10, but is not limited thereto. Meanwhile, a sea component supply path 430 may be formed between the three radiation cores 411, 412, and 413, that is, at the center of the island component supply unit 410, and three radiation cores 411, 412, and 413. ) And a plurality of sea component supply paths (422, 423, 424, 425, 426, 427, 428, 429) between the eight external radiation cores (414, 415, 416, 417, 418, 419, 420, 421). Can be formed. In addition, a plurality of sea component supply paths 441, 442, 443, 444, 445, 4346, 447, and 448 may be formed in the sea component supply unit 440. FIG. 4B is a longitudinal cross-sectional view of the island-in-the-sea yarn spun through the spinneret including the depressor partial plate of FIG. 4A, wherein three spinning cores 452, 453, and 454 are formed based on the center 451 of the island-in-the-sea yarn. Eight radiating cores 455, 456, 457, 458, 459, 460, 461, and 462 are formed outside the three radiating cores 452, 453, and 454. In this case, three spinning cores 452, 453, and 454 formed therein and eight spinning cores 455, 456, 457, 458, and 459 that are formed outside the three spinning cores 452, 453, and 454. , 460, 461, and 462 are all arranged based on the center 451 of the island-in-the-sea yarn.

Meanwhile, in the present invention, the number of island component supply passages arranged in one island component supply unit may be 38 to 1500, and more preferably, the number of island component supply passages arranged in one island component supply unit is Although it may be 500 to 1500, if the number of the spinning core is appropriately adjusted, most preferably, the number of island component supply passages arranged in one island component supply unit may be 1000 to 1500. Furthermore, 10 to 300 island component supply paths may be arranged with respect to the one spinning core, and more preferably, 100 to 150 island component supply paths may be arranged, but is not limited thereto. As a result, the number of island component supply paths arranged around the one spinning core described above is the island-in-the-sea yarn and the fineness of the island portion, the fineness of the desired microfiber, and the light modulation efficiency to be described later within the range where the aggregation of the island portions does not occur. This can be adjusted appropriately within the range that can be maximized. On the other hand, the diameter of the island component supply passage used in the present invention is preferably 0.1 ~ 0.3mm, the diameter of the sea component supply passage may be 0.2 ~ 2.0mm. The diameter of one group formed by gathering the island component supply paths may be 5 to 20 mm, and the diameter of the island component supply part may be 15 to 50 mm, but is not limited thereto. On the other hand, the spinneret of the present invention, like the normal spinneret, the diameter of the lower billet plate, which is the portion where the actual sea island is discharged, is narrower than that of the upper billet partial plate, and the lower billet plate is smaller than the diameter of the conductive component injection part formed in the billet upper plate. The diameter of the discharge port formed in the reduction may be a cross-section of the spinneret as a whole may have a funnel shape and may have a cylindrical shape that does not reduce the diameter of the lower plate.

On the other hand, in the detentional partial distribution of the present invention, the maximum value of the center distance between adjacent island component supply paths within the same group may be smaller than the maximum value of the center distance between adjacent island component supply paths between adjacent (adjacent) groups. . That is, since the detentional partial distribution plate of the present invention may have a non-uniform spacing between adjacent groups and groups formed therein, adjacent island component supply passages (groups belonging to different groups and adjoining neighboring island components, which form a boundary between groups) The longest part of the center distance of the furnace is larger than the maximum value of the center distance of adjacent islands supply paths in the same group. As a result, there is no island component supply path between the group and the group, and there is a space that is spaced apart, which is very helpful to avoid the core junction. Meanwhile, the island-in-the-sea fineness produced through the spinneret described above satisfies the single yarn fineness of the conventional island-in-the-sea yarn, but may preferably have a single yarn fineness of 0.5 to 60 denier, and more preferably a single yarn fineness of 30 to 60 denier. Can have It is advantageous to achieve the object of the present invention that the single yarn fineness of the island portion of the island-in-the-sea yarn is 0.0001 to 1.0 denier. As a result, the group island-in-the-sea island of the present invention can be arranged to the maximum number of islands can be very useful for producing a plurality of ultra-fine yarn. Also preferably, the spinning core of the present invention is advantageously formed in the region of the group to which the spinning core belongs and meets the definition of spinning core.

In addition, the shape of the cross-section of the detention part partial plate of the present invention may be circular, but it is possible to design by deforming to various shapes of the detention part partial plate according to the shape of the island-in-the-sea yarn, if the shape of the cross-section is a detention part The diameter of the cross section of the backplate may vary depending on the diameter of the desired island-in-the-sea yarn, but may preferably be 70 to 250 mm. In addition, the thickness of the detentional partial plate may be 10 ~ 30㎜ but is not limited thereto.

Next, the lower capping plate formed below the capping partial distribution plate to discharge the island-in-the-sea yarn will be described. In the conventional spinnerets for island-in-the-sea manufacturing, in order to increase the radiation efficiency, A plurality of island component supply units were formed. In this case, the number of discharge holes formed in the lower detent plate connected to the upper portion of the deferred plate coincides with the number of the island component supply units, thereby allowing a plurality of islands to be spun from one spinneret. For example, Figure 5 is a detentional partial plate 500 in accordance with an embodiment of the present invention, the detentional partial plate 500 is formed with twelve island component supply parts (510, 511). FIG. 6 is a photograph of a lower stopper plate 600 having a discharge part corresponding to the number of island components of a conventional delimiter partial plate, and each of the 12 discharge parts 610, 630, and 650 connected to the twelve island component supply parts. This is formed through each discharge port is to be able to radiate 12 islands (FIG. 3b) at a time.

By the way, in order to improve the brightness by using the seam yarn (FIG. 3b, the number of island components 1016, diameter 19㎛) manufactured through the upper portion of the plate and the lower plate of FIG. Since mono yarn itself has low light modulation efficiency, it is actually spliced into 40 de (denier) / 12 fila (strand) and 80/24 (de / fila) and weaved into a fabric and placed inside the light modulator. Specifically, FIG. 7 is a fabric 700 including the birefringent island-in-the-sea yarn of FIG. 3B, and the fabric 700 is 80/24 (de / fila) of the birefringent island-in-the-sea yarn 710 (monosa) as a warp. Weaving the fabric by weaving the yarn and weaving the isotropic fibers 720 as the weft yarn. As a result, the light modulation efficiency was improved, but the diameter of mono yarn was small and the number of strands was spliced, resulting in trimming (A, B, C in FIG. 7) in some islands in the drawing process, resulting in the occurrence of mauve, resulting in luminance-enhanced film. It became a defect.

In order to improve this, the lower detent plate is formed under the depressed upper plate, and the lower detention plate is formed with one or more discharge ports for collecting and discharging some or all of the polymers that have passed through the plurality of island component supply units and the plurality of sea component supply units. Through this, the island-in-the-sea yarn was sought to solve the above problems. Specifically, FIG. 8 is a photograph of a lower stopper plate according to an exemplary embodiment of the present invention, unlike the conventional lower stopper plate of FIG. 6, the discharge hole 810 in which island islands are radiated to the lower stopper plate 800 of FIG. 8. Only one is formed. In other words, even in the case of using the detentional partial plate formed with the twelve island component supply parts shown in FIG. 5, the number of discharge holes formed in the lower detent plate is smaller than the number of the island component supply parts, thereby allowing each individual The plurality of polymers supplied to the powder supply unit and the sea component supply unit may be collected inside the spinneret and spun into a plurality of island-in-the-sea yarns. In case of forming only one discharge port 810 as shown in FIG. The island-in-the-sea yarn (mono yarn) of 40-80 micrometers in diameter can be manufactured. The island-in-the-sea yarn of FIG. 9 has a space in which the island portion is not dense at the central portion thereof, so that the seam-bonding phenomenon does not occur.

Through this process, when manufacturing a sea island yarn with more than 10000 islands inside a single sea island yarn (monosa yarn) and weaving it into a fabric, it prevents the seaweed phenomenon because the trimming of the island island is maintained while the brightness is maintained. have. In detail, FIG. 10 is a fabric 1000 included in the luminance-enhanced film in which the island-in-the-sea yarn of FIG. 9 is inclined 1010 in the form of mono yarn, and the isotropic fibers are woven from the weft yarn 1020. Since no trimming takes place in, it is possible to block the cattle phenomenon. As a result, the reverse polarization effect does not occur in the portion where the trimming occurs, and thus the optical modulation efficiency can be maintained, and since the defects do not occur in the luminance-enhanced film, the visibility of the optical modulation object can be dramatically improved. In addition, weaving can be improved because we do not take the fiber that is broken when the weaving machine changes and passes through the Radius Heald.

On the other hand, in order to combine the individual polymers in the spinneret, preferably, the number of discharge ports may be smaller than the number of the conductive component supply units, and more preferably, the number of discharge ports may be less than half the number of the conductive component supply units. Most preferably, the number of the discharge holes may be one.

On the other hand, according to an aspect of the present invention, the lower plate 800 is a flow path (820, 821) for allowing the polymer supplied from each island component supply portion and the sea component supply portion to flow toward one discharge port 810 It may include. In this case, the flow paths 820 and 821 may be designed in various numbers and shapes according to the arrangement of the spinneret, and the discharge holes 810 may be formed in an area where the flow path and the flow path intersect. The diameter of the lower retainer plate is typically the same as or smaller than the diameter of the upper portion of the upper plate, the diameter of the discharge port may be 0.2 ~ 1.0 mm, the length of the flow path may be 40 ~ 120 mm, the width of the flow path is 4 ~ 10 It may be mm, but is not limited thereto and may be variously designed according to the specifications of the desired island.

On the other hand, in the island-in-the-sea yarn manufactured through the spinneret for manufacturing the island-in-the-sea yarn of the present invention, the liquid crystal display luminance-enhanced film including the same may be manufactured when the sea portion is still used.

Conventional liquid crystal display devices do not necessarily have high utilization efficiency of light emitted from the backlight. This is because more than 50% of the light emitted from the backlight is absorbed by the back side optical film. Therefore, in order to increase the utilization efficiency of the backlight light in the liquid crystal display device, a brightness enhancing film is provided between the optical cavity and the liquid crystal assembly. However, in the conventional brightness enhancement film, an isotropic optical layer and an anisotropic optical layer on a plate having different refractive indices are alternately stacked, and the optical thickness and refractive index between the optical layers, which can be optimized for selective reflection and transmission of incident polarization by stretching them Since it is manufactured to have a, there is a problem that the manufacturing process of the luminance-enhanced film is complicated.

In particular, since each optical layer of the luminance-enhanced film has a flat plate structure, it is necessary to separate P-polarized light and S-polarized light in response to a wide range of incident angles of incident polarization, so that the number of optical layers is excessively increased and the production cost is exponentially increased. There was a growing problem. In addition, due to the structure in which the number of laminated layers of the optical layer is excessively formed, there is a problem in that optical performance decreases due to light loss.

Accordingly, by placing the island-in-the-sea yarn manufactured through the spinneret for manufacturing the island-in-the-sea yarn of the present invention, the light incident from the light source is reflected at the birefringent interface that is the interface between the group-type island-in-the-sea yarn and the isotropic substrate.,Scattering and refraction can cause light modulation to dramatically improve luminance. Specifically, Referring to Figure 11 Light irradiated from an external light source can be largely divided into S polarization and P polarization. When only a specific polarization is desired, P polarization passes through the luminance-enhanced film without being affected by the birefringence interface, while S polarization is generated at the birefringence interface. Refraction, Scattering, Reflection When the wavelength is modulated into a randomly shaped wavelength, i.e., S-polarized light or P-polarized light, reflected through a reflector near the light source and irradiated to the luminance-enhanced film, P-polarized light passes through the luminance-enhanced film and S-polarized light is Scattered or reflected again. If this process is repeated, the desired P polarization can be obtained. Therefore, when a plurality of group islands-in-the-sea yarns having a birefringent interface at the interface with the substrate are disposed in the substrate, the luminance can be dramatically improved even when the conventional luminance-enhanced film is not laminated.

Furthermore, the inventors of the present invention do not manufacture the multilayer birefringent fibers as the polymer having the birefringent interface, and thus, the production cost is low and the production is easy. However, the effect of brightness enhancement is insignificant. Instead, they found a problem that was difficult to apply to industrial sites.

Accordingly, the above-mentioned problem was overcome by using a birefringent island-in-the-sea yarn as a polymer having the birefringent interface. Specifically, when the birefringent island-in-the-sea yarns were used, it was confirmed that the effects of light modulation efficiency and luminance improvement were remarkably improved compared with the case of using ordinary fibers. More specifically, the island portion of the portion constituting the island-in-the-sea yarn has anisotropy, and the sea portion partitioning the island portion has isotropy. In this case, not only the interface between the island-in-the-sea yarn and the base material, but also the interface between the islands and sea portions of the island-in-the-sea yarn has a birefringent interface, so that a birefringent interface is generated only at the interface between the base material and the birefringent fibers. Compared to the fiber, the light modulation effect is significantly increased, so that it can be applied to the actual industrial site by replacing the laminated luminance-enhanced film. Therefore, the use of birefringent island-in-the-sea yarn is superior to the use of conventional birefringent fibers, and the efficiency of brightness enhancement is excellent. The luminance enhancement efficiency is remarkably improved as compared with the case where the interface can be formed. Specifically, in an island-in-the-sea island comprising an optically isotropic sea portion and an island portion having anisotropy, the magnitude of the substantial coincidence or mismatch of the refractive indices along the X, Y, and Z axes in space affects the degree of scattering of the polarized light along the axis. Crazy In general, the scattering power varies in proportion to the square of the refractive index mismatch. Thus, the greater the degree of mismatch in refractive index along a particular axis, the more strongly scattered light polarized along that axis. Conversely, when the mismatch along a particular axis is small, the light polarized along that axis is scattered to a lesser extent. If the refractive index of the sea portion along a certain axis substantially coincides with the refractive index of the island portion, the incident light polarized by an electric field parallel to this axis will not be scattered regardless of the size, shape, and density of the portion of the island. Will pass. Also, when the refractive indices along that axis are substantially coincident, the light beam passes through the object without being substantially scattered. More specifically, FIG. 5 is a cross-sectional view showing a path of light transmitted through the birefringent island-in-the-sea yarn of the present invention. In this case, the P wave (solid line) is transmitted without being affected by the interface between the birefringent island-in-the-sea yarn and the interface between the island and the sea inside the birefringent island-in-the-sea yarn, while the S-wave (dotted line) The modulation of light occurs due to the influence of the birefringence interface between the boundary surface of the island and the sea portion inside the islands of the islands and / or birefringent islands. As a result, the group type island-in-the-sea yarn of the present invention can be utilized as a photochromic fiber by expressing a specific color according to the island-in-season ratio and fiber diameter without adding a dye or the like.

In the present invention, the refractive index of the island portion and the sea portion of the island-in-the-sea yarn is preferably 0.05 or less in difference in the two axial directions and 0.1 or more in difference in the refractive index in the other one axial direction. In this case, P wave passes through the birefringent interface of island-in-the-sea yarn, but S wave can cause light modulation. More preferably, the difference in refractive index in the longitudinal direction of the sea portion and the island portion of the island-in-the-sea yarn is 0.1 or more, and the light modulation efficiency may be maximized when the refractive indexes of the sea portion and the island portion in the remaining two axial directions substantially match. have. As a result, in order to maximize the light modulation efficiency of the island-in-the-sea yarn as described above, the optical properties of the island portion and the sea portion should be different, and the area of the light modulation interface should be wide. For this purpose, the number of the drawing parts should be large, and preferably, the number of drawing parts should exceed 500. However, as described above, even if the refractive index of the island portion is anisotropic and the refractive index of the sea portion is arranged isotropically in the conventional islands and islands, when the number of the island portions exceeds 500, the island portion is agglomerated, resulting in the area of the optical modulation interface. This is reduced and there is a fatal problem that the light modulation efficiency is lowered. Thus, in the present invention, when two or more spinning cores are formed as described above, even when 500 or more, preferably 1000 or more islands are disposed, the phenomenon of bunching of islands can be prevented. As a result, the light modulation efficiency of the island-in-the-sea yarn is maximized, and when the island-in-the-sea yarn radiated through the spinneret of the present invention is added to the luminance-enhanced film, the light modulation effect and a dramatic improvement in brightness can be expected.

The sea portion and / or island portion, which may be used in the present invention, may be used in any component used as a conventional sea island material, and preferably, polyethylene naphthalate (PEN) or copolyethylene naphthalate (co-PEN). , Polyethylene terephthalate (PET), polycarbonate (PC), polycarbonate (PC) alloy, polystyrene (PS), heat-resistant polystyrene (PS), polymethyl methacrylate (PMMA), polybutylene terephthalate (PBT) , Polypropylene (PP), polyethylene (PE), acrylonitrile butadiene styrene (ABS), polyurethane (PU), polyimide (PI), polyvinyl chloride (PVC), styrene acrylonitrile mixture (SAN), Ethylene vinyl acetate (EVA), polyamide (PA), polyacetal (POM), phenol, epoxy (EP), urea (UF), melanin (MF), unsaturated polyester (UP), silicone (SI), elastomer and At least one of the cycloolefin polymer may be used. However, most preferably, a birefringent island-in-the-sea yarn uses polyethylene naphthalate (PEN) as the island portion, and copolyethylene naphthalate and a polycarbonate alloy alone or mixed to be used as a sea portion are common materials. The luminance is remarkably improved as compared with the birefringent island-in-the-sea yarn manufactured by the present invention. In particular, when the polycarbonate alloy (alloy) is used as the sea portion, it is possible to produce a birefringent island-in-the-sea yarn having the best optical modulation properties. In this case, the polycarbonate alloy may be preferably composed of polycarbonate and modified glycol polycyclohexylene dimethylene terephthalate (PCTG), and more preferably polycarbonate and modified glycol poly Cyclohexylene dimethylene terephthalate (PCTG) is a polycarbonate alloy consisting of a weight ratio of 15: 85 ~ 85: 15 is effective to increase the brightness. If the polycarbonate is added less than 15%, the viscosity of the polymer required to secure the radioactivity is high, and the ordinary spinning machine cannot be used. If the polycarbonate is more than 85%, the glass transition temperature increases, and after the nozzle discharge, the radiation tension increases to secure radioactivity. Has a difficult problem.

Most preferably, the polycarbonate and the modified glycol polycyclohexylene dimethylene terephthalate (PCTG) in a weight ratio of 4: 6 to 6: 4 exhibit the best effect on brightness enhancement. Furthermore, it is effective to improve the light modulation efficiency by selecting a material in which the refractive index in the two axial directions is substantially the same, but the difference in the refractive index in the one axial direction is large. On the other hand, a method for changing an isotropic material to birefringence is commonly known and, for example, when drawn under suitable temperature conditions, the polymer molecules are oriented so that the material becomes birefringent.

As a result, the island-in-the-sea yarn manufactured through the spinneret for manufacturing the island-in-the-sea yarn according to the present invention is arranged in groups by centering two or more spinning cores, so that the number of the islands is 500 or more. The phenomenon does not occur. Therefore, since more than 500 islands can be arranged in one island island, the fineness of islands can be reduced, which is very advantageous for producing microfiber yarn, and it is possible to produce more than 500 ultrafine yarns in one island island. Can be saved. In addition, the group type island-in-the-sea yarn according to the present invention may be utilized as a photochromic fiber by expressing a specific color according to the sea island ratio and fiber diameter without adding a compound causing color development such as dye due to the excellent light modulation effect. When used in the brightness enhancement film without dissolution can maximize the light modulation effect of the film.

Furthermore, the island portion of the island-in-the-sea yarn produced when the islands are produced by producing a bottom seam plate formed with at least one discharge port for collecting and discharging some or all of the polymers that have passed through the plurality of island component supply units and the plurality of sea component supply units. Since the number of can be more than 10,000, it is possible to solve the phenomenon occurring in the brightness enhancement film.

Hereinafter, the present invention will be described in detail by Examples and Experimental Examples. The following Examples and Experimental Examples are only illustrative of the present invention, and the scope of the present invention is not limited to the following Examples and Experimental Examples.

≪ Example 1 >

An isotropic PC alloy in which polycarbonate and modified glycol polycyclohexylene dimethylene terephthalate (PCTG) is mixed at 5: 5 as a sea component (nx = 1.57, ny = 1.57, nz = 1.57), and anisotropic PEN (nx = 1.88, ny = 1.57, nz = 1.57). In order to obtain the island-in-the-sea yarn of the same cross-section as in FIG. 3B, the spinneret having the cross-section of the upper portion of the captive portion of FIG. Through this composition, the undrawn yarn 150/24 was spun under the condition of spinning temperature of 305 ° C. and the spinning speed of 1500 M / min, and then the drawn yarn 50/24 was obtained by three times stretching. 3B is an electron micrograph of the island-in-the-sea yarn radiated through the spinneret of FIG. 3A.

<Example 2>

Isotropic PC alloy containing polycarbonate and modified glycol polycyclohexylene dimethylene terephthalate (PCTG) in a 5: 5 solution (nx = 1.57, ny = 1.57, nz = 1.57, melting temperature: 145 ° C) , Anisotropic PEN (nx = 1.88, ny = 1.57, nz = 1.57, melting start temperature: 262 ° C.). The birefringence having the cross section of FIG. 9 by supplying the island component and the sea component to the spinneret having a portion of the depressor plate including twelve island component supply parts corresponding to FIG. 5 and a lower plate having one discharge port of FIG. The island-in-the-sea yarn (mono yarn, number of island components: 12192 pieces, diameter: 66 µm) was prepared.

The birefringent island-in-the-sea yarn (monosa) was inclined (40de / 1fila), and the same isotropic PC alloy fiber (melting temperature: 145 ° C) was manufactured at 60/24, and weaved into a fabric. It was.

FIG. 10 is an SEM photograph of the surface of a fabric woven using the island-in-the-sea yarn of FIG. 9. It can be seen from the photograph that the trimming does not occur in the birefringent islands used as a slope.

Comparative Example 1

As shown in FIG. 1A, the same method as in Example 1 was performed except that the yarns were spun through a spinneret including a spinneret including one spinneret having 334 islands supply paths formed thereon. It was. FIG. 1B is an electron micrograph of the island-in-the-sea yarn radiated through the spinneret of FIG. 1A.

Comparative Example 2

After weaving 24 strands of the island-in-the-sea yarn manufactured in Example 1 (80de / 24fila), it was inclined, and an isotropic PC alloy fiber (melting temperature: 145 ° C.), which was the same as the above seaweed, was prepared at 60/24, Was woven into a fabric.

7 is a SEM photograph of the surface of the fabric prepared in Comparative Example 2. Through the above picture, it can be seen that entanglement and trimming (A, B, C) occurred between birefringent islands used as a slope.

The spinneret for manufacturing island-in-the-sea yarn of the present invention has excellent optical modulation performance without defects and does not cause defects, and therefore requires high brightness in fields such as cameras, optical devices such as cameras, and mobile phones, LCDs, and LEDs. It can be widely used to manufacture the island-in-the-sea yarn applied to the liquid crystal display device.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims. .

352, 353: spinning core

Claims (30)

Detained portion for manufacturing island-in-the-sea yarn including a island component supply passage and a sea component injection portion formed on an outer circumferential surface of the island component supply portion and a sea component injection portion including a sea component supply passage for injecting the sea component polymer. In the spinnerette for manufacturing island-in-the-sea yarn comprising a back plate,
A detention part partial plate in which the island component supply passage is partitioned into a plurality of groups, the plurality of island component supply sections and a plurality of sea component supply sections inside the island component supply section; And
A lower holding plate formed under the depressive partial plate, the lower holding plate having one or more discharge holes formed therein to collect and discharge some or all of the polymers passing through the plurality of island component supply units and the plurality of sea component supply units; Spinnerets for the manufacture. The method of claim 1,
The spinnerette for producing island-in-the-sea yarns characterized in that the number of the discharge holes is smaller than the number of the island component supply parts. The method of claim 2,
The number of the discharge port is spinneret for manufacturing island islands, characterized in that less than half of the number of the island component supply unit. The method of claim 3,
The spinneret for producing island-in-the-sea yarns, characterized in that the number of the discharge holes is one. The method of claim 1,
The lower stopper plate is a spinneret for producing island-in-the-sea yarn, characterized in that at least one flow path for guiding the island component polymer passed through the island component supply portion and the sea component polymer passed through the sea component supply portion to the discharge port is formed. The method of claim 5,
The discharge port is a spinneret for manufacturing island islands, characterized in that formed in the area where the flow path and the flow path intersects. The spinneret for manufacturing island-in-the-sea yarn of claim 1, wherein the island component supply passage is grouped and arranged around two or more spinning cores. The spinneret for manufacturing island-in-the-sea yarn according to claim 7, wherein the spinning core has one spinning reference core positioned at the center of the island component supply unit and a plurality of spinning peripheral cores are arranged around the spinning core. The spinneret for manufacturing island-in-the-sea yarn according to claim 8, wherein the spinning core is 3 to 20. The spinneret for manufacturing island-in-the-sea yarn according to claim 8, wherein the spinning core is 6 to 10. The spinneret for manufacturing island-in-the-sea yarn according to claim 8, wherein 10 to 300 islands are supplied with respect to the one spinning reference core or one spinning peripheral core. The spinneret for manufacturing island-in-the-sea yarn according to claim 8, wherein a sea component supply path is formed between the spinning reference core and the spinning peripheral core. The spinneret for manufacturing island-in-the-sea yarn according to claim 1, wherein the number of island component supply paths included in one island component supply unit is 38 to 1500. The spinnerette for manufacturing island-in-the-sea yarn according to claim 1, wherein the number of island component supply paths included in one island component supply unit is 500 to 1500. The spinneret for manufacturing island-in-the-sea yarn according to claim 1, wherein the number of island component supply paths included in one island component supply unit is 1000 to 1500. The spinnerette for manufacturing island-in-the-sea yarn according to claim 1, wherein the number of island component supply paths included in the entire island component supply unit is 10000 to 20,000. The spinneret for manufacturing island-in-the-sea yarn of claim 1, wherein the number of the island component supply units is 2 to 20. The spinnerette for manufacturing island-in-the-sea yarn of claim 1, wherein the number of the island component supply units is 5 to 15. 8. The spinneret for manufacturing island-in-the-sea yarn according to claim 7, wherein the grouped island component supply paths are identical or different. 8. The spinneret for manufacturing island-in-the-sea yarn according to claim 7, wherein the spinning core is arranged based on the center of the island component supply unit. The spinneret for manufacturing island-in-the-sea yarn according to claim 20, wherein a sea component supply path is formed at the center of the island component supply unit. The spinneret for manufacturing island-in-the-sea yarn according to claim 20, wherein a sea component supply path is formed between the spinning cores. The spinneret for manufacturing island-in-the-sea yarn according to claim 1, wherein the island component supply unit has a diameter of 15 to 50 mm. The spinneret for producing island-in-the-sea yarn according to claim 1, wherein the island component supply passage or the sea component supply passage has a diameter of 0.2 mm to 2.0 mm. The spinneret for producing island-in-the-sea yarn according to claim 1, wherein the group has a diameter of 8 to 15 mm. The spinneret for manufacturing island-in-the-sea yarn of claim 1, wherein at least one sea component supply path is formed therein. The method of claim 1, wherein the plurality of groups are characterized in that the maximum value of the center distance between adjacent island component supply paths within the same group is smaller than the maximum value of the center distance between adjacent island component supply paths between neighboring groups. Spinnerets for the manufacture of islands. The spinneret for manufacturing island-in-the-sea yarn of claim 7, wherein the spinning core is formed in a group to which the spinning core belongs. The island-in-the-sea yarn spun through the spinneret for manufacturing the island-in-the-sea yarn of claim 1. 30. The island-in-the-sea yarn of claim 29, wherein the number of island-in-the-sea yarns is 10000 to 20,000.

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