JP6672861B2 - Composite die, method for producing multilayer laminated fiber using the same, and multilayer laminated fiber - Google Patents

Description

  The present invention relates to a composite die, a method for producing a multilayer laminated fiber using the same, and a multilayer laminated fiber.

  Fibers made of thermoplastic polymers such as polyesters and polyamides have excellent mechanical properties and dimensional stability, and are therefore widely used not only for clothing but also for interiors, vehicle interiors, and industrial applications. For example, in clothing applications, improvements have been made such as modifying polymers for the purpose of imparting new functionality such as realizing dyeing with excellent clarity. In addition, in industrial material applications, improvements such as modification of polymers aiming at increasing strength and elasticity and imparting new functions such as weather resistance and flame retardancy are being made. Furthermore, in addition to the above-mentioned improvements, the development of conjugate fibers that provide completely new functions by combining two or more types of polymers to complement the insufficient performance of a single-component polymer has been actively performed. I have. One of its functions is to use a structure in which multiple polymers with different refractive indices are alternately laminated in a conjugate fiber without using dyes such as dyes and pigments, so that light reflection and interference, Optically functional fibers that exhibit structural coloring and heat ray reflection by actively utilizing physical phenomena such as diffraction and scattering have been proposed. Fibers containing colorants and color formers show the aging of color development due to their deterioration, whereas structural coloring has the merit that almost no aging of the color development is seen because the principle of color development is in the structure itself. There is. In addition, since the laminated structure is multilayered and the thickness of the layer is inclined, it can reflect ultraviolet rays and infrared rays with high efficiency, so it has sensitive effects such as coloring, aesthetics, and highly efficient reflection characteristics Functional effects can be obtained. As a result, developments have been made to impart materials to clothing, interiors, vehicle interiors, and the like.

  As a composite die for obtaining a multilayer laminated fiber, for example, Patent Literature 1 discloses a composite die as shown in FIG. 9A and a cross section of the composite fiber obtained thereby. In the figure, A and B are two kinds of polymers having different refractive indices, C is a protective layer polymer, 28 is a polymer A introduction channel, 29 is a polymer B introduction channel, and 30 is an opening for supplying the polymer A. A hole group row, 31 is a lamination forming flow path, 32 is a funnel-shaped flow path, 33 is a core-sheath forming flow path, and 27 is a composite polymer discharge hole.

  In the composite mouthpiece of Patent Document 1, the polymer A is guided from the introduction channel 28 to the group of apertures 30 and flows down to the lamination forming channel 31 at the same time as not shown here. A part of the polymer A introduced from 28 is diverted to a diversion channel for forming the protective layer polymer C. Further, the polymer B flows from the introduction channel 29 into the lamination forming channel 31 provided on the downstream side of the group of apertures 30, forms a polymer pool, and on the other hand, flows down the group of apertures 30. A and polymer A and polymer B form an alternating laminar flow. Thereafter, the protective layer polymer C and the core-sheath forming flow formed by the polymer A that has passed through the funnel-shaped flow path 32 having a rectangular cross section in a direction perpendicular to the flow direction of the polymer and passed through the branch flow path described above. They merge at the path 33 and are discharged from the composite polymer discharge hole 27. As a result, as shown in FIG. 9B, a composite fiber in which two types of polymers A and B having different refractive indices are alternately laminated in parallel with the long axis direction of the fiber is surrounded by the protective polymer layer C. Can be formed. The interference of the reflected light between the layers of this alternate layered product can provide a structural coloring effect.

  By the way, in the composite fiber obtained by using the composite die of Patent Document 1, since the direction of the resin layer to be laminated is one direction, structural coloring is confirmed in directions other than the direction perpendicular to the lamination surface of the resin layer. When applying to the above-mentioned materials, the incident direction of light must be considered. Therefore, in order to sufficiently exert the aesthetic effect, there has been a strong demand for a multilayer laminated fiber that develops a color without depending on the incident direction of light.

  In Patent Literature 2, a multilayer laminated fiber that develops a color in the entire circumferential direction around the longitudinal direction of the fiber as shown in FIG. 10B using a composite die as shown in FIG. A method is disclosed. In the figure, 34 is a multilayer laminated fiber, 35 is a core component resin layer, 36 is a first component resin layer, 37 is a second component resin layer, 38 is a channel for introducing the core component polymer, and 39a, 39b, and 39c are the first. The component polymer introduction flow paths, 40a, 40b, and 40c indicate the second component polymer introduction flow paths, 41 indicates a guide pipe, and 42 indicates an introduction plate constituting each introduction flow path.

  In the composite mouthpiece of Patent Document 2, each introduction flow path is composed of an annular flow path capable of forming one layer separated from an introduction hole and an adjacent introduction flow path. The first component polymer is introduced into the introduction channels 38a, 39b, and 39c in the introduction channel 38, and the second component polymer is introduced into the introduction channels 40a, 40b, and 40c in such a manner that the respective polymers have a predetermined thickness. After being supplied and sequentially laminated to form a multilayer structure, the liquid is discharged from the guide pipe 41. Thereby, the first component resin layer 36 and the second component resin whose cross-sectional shapes perpendicular to the length direction are substantially annular are provided on the core component resin layer 35 whose cross-sectional shape perpendicular to the fiber length direction is substantially circular. A multilayer laminated fiber 34 in which a plurality of layers 37 are laminated can be obtained. Thereby, an effect of structural coloring can be obtained in the entire circumferential direction around the longitudinal direction of the fiber.

  Patent Document 3 does not describe the structure of the spin pack in detail, but discloses a method for producing a multilayer laminated fiber. As a result of repeated studies of the pack structure by the present inventors, it is presumed that a multilayer laminated fiber is manufactured using a spinning pack as shown in FIG. FIG. 11A is an overall view of the spinning pack, and FIG. 11B is a partially enlarged view of mixer elements 45a and 45b arranged inside the static mixer 43. FIGS. 12A to 12G sequentially show the flow of forming a cross section of a multilayer laminated fiber when the spinning pack of Patent Document 3 predicted by the present inventors is used. 12 (a) to 12 (c) show cross sections in the static mixer 43 of FIG. 11, FIGS. 12 (d) to 12 (e) show cross sections in the flow dividing plate 44, and FIG. , And FIG. 12 (g) shows a cross section of the obtained multilayer laminated fiber. In the figure, reference numeral 43 denotes a static mixer, 44 denotes a flow dividing plate, 10 denotes a discharge plate, and 45a and 45b denote mixer elements, respectively.

  In the spin pack of Patent Document 3, the two components of the polymers A and B supplied from the introduction channels 28 and 29 of the respective polymers are supplied into a cylindrical static mixer 43 and are inside the static mixer 43. The rectangular plate is sequentially passed through a plurality of mixer elements 45a and 45b each having a shape twisted by 180 °. Thereby, after the polymer A and the polymer B are divided into right and left, by repeating the lamination up and down a plurality of times, it is possible to form a parallel and alternately laminated composite polymer flow (FIG. 12A )-(C)). Next, as shown in FIGS. 12D to 12E, after the composite polymer flow is guided to a flat shape in the flow dividing plate 44 on the downstream side of the static mixer 43 (FIG. 12E). Then, by discharging from the discharge plate 10 in which the annular slit hole with a part missing is formed (FIG. 12 (f)), the multi-layer laminated fiber 34 (where two different polymer components are alternately laminated concentrically. FIG. 12G can be obtained.

JP 2008-111205 A JP 2009-174068 A JP-A-11-181630

  However, in the composite ferrule disclosed in Patent Document 1, since the polymer A is supplied from the introduction channel 28 to the group of apertures 30 in one direction, the pressure of the polymer flowing on the side near and far from the introduction channel 28 is increased. Since the loss is different, a difference occurs in the amount of the polymer discharged from the aperture group 30 on the side closer to the introduction flow path 28 and on the side farther from the introduction flow path 28, so that it is difficult to form a uniform layer thickness. is there. For example, the pressure loss of each hole can be adjusted by increasing the hole diameter of the hole group row 30 toward the outer peripheral side, and the single-hole discharge amount can be kept constant. Adjustment of the hole diameter is required every time, which causes difficulty in design and complicated processing. Similarly, since the polymer B is also supplied from the introduction channel 29 to the lamination forming channel 31 in one direction, the supply unevenness of the polymer B (in the layer near the introduction channel 29 and the layer far from the introduction channel 29). (The layer on the near side is thick and the layer on the far side is thin). Therefore, it is considered that the supply may be performed in two directions (one direction in FIG. 9) from both sides of the introduction path 29. In this case, the supply unevenness (the outer side is on the near side (outside) and the center side layer of the introduction flow path 29). (Thick and thin on the center side), and the supply unevenness becomes more prominent as the number of layers increases.

  In addition, as described above, in the composite fiber obtained using this composite die, since the direction of the laminated resin layer is one direction, structural coloring is confirmed in directions other than the direction perpendicular to the lamination surface of the resin layer. Can not do it.

  In addition, when the composite die disclosed in Patent Document 2 is used, a multilayer laminated fiber that develops a color without depending on the incident direction of light can be obtained. However, in order to maximize the structural coloring effect, it is necessary to use each layer. In order to increase the difference in the refractive index of the polymer constituting, and to reflect the incident light with high efficiency, it is necessary to arrange a large number of layers. Here, the difference in the refractive index is uniquely determined by the type of the selected polymer. However, in order to manufacture a multi-layer laminated fiber having a large number of laminated layers using the composite die of Patent Document 2, each introduction flow path is configured. The number of the introduction plates 42 to be used is required at least as many as the number of the stacks. For this reason, the structure of the flow path becomes extremely complicated, and the manufacturing cost of the base may be excessive. The first component polymer introduction flow paths 39a, 39b, 39c and the second component polymer introduction flow paths 40a, 40b, 40c finally connected to the annular flow path are connected to the annular flow path from one direction. Therefore, unevenness in the supply of the polymer is likely to occur on the connecting side and the opposite side, leading to unevenness in the thickness of the multilayer laminated fiber. Further, in the technique of Patent Document 2, one multi-layer laminated fiber (monofilament) can be produced from one composite die, but in order to produce a plurality of multi-layer laminated fibers (multi-filament) from one composite die, a composite fiber is required. The size of the base is increased, and unfavorable problems in productivity and operability may occur in multi-spindle type equipment in the field of textiles. In addition, in order to make the thickness of each layer of the multilayer laminated fiber inclined, the width and plate thickness of the annular flow path can be adjusted to obtain a desired layer thickness. It is necessary to prepare the plate 42 separately, which leads to an increase in cost.

  Further, since the composite mouthpiece disclosed in Patent Document 3 uses a static mixer, the equipment cost may increase due to the complexity and lengthening of the apparatus configuration. In addition, since the static mixer has a flow path configuration in which the layered composite polymer flow is divided into two portions on the left and right, and then merged again in a layered manner, the flow becomes unstable when the composite polymer is divided or merged. As a result, unevenness may occur in the single layer thickness, and it is difficult to produce a multilayer laminated fiber having a uniform layer thickness. Furthermore, it is not possible to form a multilayer laminated fiber structure in which the thickness of each layer of the obtained fiber is inclined. Also, changing the shape of the flat composite polymer flow into an annular composite polymer flow partially lacking in the flow dividing plate 44 requires an ordinary processing method (machine It is presumed that the production is difficult by the electric discharge machining. Even if it can be manufactured, the flow dividing plate 44 itself becomes very long, so that the equipment cost becomes excessive. Further, since the composite polymer flow discharged from the annular slit hole has a C-shape, the polymer does not exist in the inner gap. Therefore, by merely discharging from the annular slit hole, the polymer on the inner peripheral side of the C-shape gradually moves toward the center direction of the fiber cross-section to form a concentrically laminated fiber cross-section. There is a possibility that the polymers are merged first, so that air does not escape inside the laminated fiber and remains, or a deviation of a lamination position at the time of merging and a variation in thickness. As a means for suppressing these, for example, a channel for actively discharging air from the outside from a portion where a part of the annular shape is missing, or a channel for discharging the core component polymer to the inner peripheral side of the annular slit hole serving as a void. Although it can be improved by providing it separately, it also leads to complication of the device. In addition, when the two ends of the C-shape merge, each layer does not merge well, and thickness unevenness of each layer may occur at the junction.

  As described above, in order to have a highly efficient structural coloring property and heat ray reflection property without depending on the incident angle of light, it is an important element to produce a multi-layer multi-layered fiber having an extremely large number of layers. Although it is a technology, the conventional technology has various problems. Therefore, solving this problem has important industrial significance.

  Therefore, an object of the present invention is to provide a composite die for producing a multilayer laminated fiber in which a cross section orthogonal to the length direction of the fiber is alternately laminated in a substantially annular shape, even when the number of layers is extremely large, An object of the present invention is to provide a composite die capable of producing a multifilament multilayer laminated fiber having a high uniformity of a single layer thickness while reducing the number of components constituting the composite die.

A composite die according to the present invention for solving the above-mentioned problems is a composite die for discharging a composite polymer stream composed of a first component polymer and a second component polymer,
One or more distribution plates in which distribution holes and / or distribution grooves for distributing each polymer component are formed; and a plurality of first component polymer ejections positioned downstream of the distribution plate in the direction of the polymer spinning path. A lowermost distribution plate formed with holes and a plurality of second component polymer ejection holes; and a first component polymer ejection hole positioned downstream of the lowermost distribution plate in the direction of polymer spinning. A discharge plate formed with a composite polymer discharge hole communicating with the component polymer discharge hole,
In the lowermost distribution plate, a first component polymer ejection hole array in which at least a part of the first component polymer ejection holes are arranged in a ring, and at least a part of the second component polymer ejection holes are arranged in a ring. And the second component polymer ejection hole array alternately surrounds the ejection hole group, and the ejection plate is provided with at least two or more of the composite polymer ejection holes communicating with the ejection hole group. .

  The method for producing a multilayer laminated fiber of the present invention is a method for producing a multilayer laminated fiber by a composite spinning machine using the composite die of the present invention.

  In the multilayer laminated fiber of the present invention, the first component resin layer formed of the first component polymer and the second component resin layer formed of the second component polymer are alternately laminated concentrically, and the thickness of each layer varies. Is 1 to 20%, respectively.

  In the present invention, the “distribution hole” means a hole that is formed by a combination of a plurality of distribution plates and plays a role of distributing the polymer in the direction of the spinning path of the polymer. Here, the distribution hole may penetrate the distribution plate, and, in the thickness direction of the distribution plate, a part of the thickness forms a distribution groove, and the distribution hole is formed so as to be continuous with the distribution groove. May be penetrated.

  The “distribution groove” refers to a groove formed by a combination of a plurality of distribution plates, and serves to distribute the polymer in a direction perpendicular to the direction of the spinning path of the polymer. Here, the distribution groove may be an elongated hole (slit) or an elongated groove may be dug.

  "Polymer spinning direction" refers to the main direction in which the polymer of each component flows from the discharge holes arranged on the uppermost distribution plate to the composite polymer discharge holes arranged on the discharge plate.

  The “composite polymer discharge hole” refers to a discharge hole from which a composite polymer is discharged in a state where the first component polymer and the second component polymer are alternately laminated in a layered manner.

The “hourglass shape” is a quadrilateral, and refers to a shape in which a line segment connecting the end points of two parallel line segments is connected to the center line by an arc-shaped line. Here, the two parallel line segments may have the same length or different lengths.
“Flat shape” is a quadrilateral, and refers to a shape surrounded by two long sides and two short sides. Here, both the long side and the short side may be straight lines, and some of them may be curved lines.

  By using the composite die according to the present invention, it is possible to obtain a multi-layer laminated fiber having high uniformity of the thickness of each layer with multiple yarns from one die. Further, it is possible to obtain multi-layer laminated fibers having various laminated constitutions only by changing only the distribution plate which is a part of the composite base.

FIG. 3 is a cross-sectional view of a lowermost distribution plate for producing one multilayer laminated fiber used in the embodiment of the present invention. FIG. 7 is a partially enlarged cross-sectional view of a lowermost distribution plate for producing one multilayer laminated fiber used in another embodiment of the present invention. It is an outline sectional view of a compound mouthpiece used for an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of a composite spinneret used in an embodiment of the present invention, a spin pack, and a periphery of a cooling device. FIG. 4 is a view taken along the line XX in the composite base of FIG. 3. FIG. 3 is a schematic partial development view of a distribution plate and a lowermost distribution plate used in the embodiment of the present invention. It is an outline sectional view of a compound mouthpiece used for another embodiment of the present invention. It is a schematic sectional drawing in the embodiment of the present invention which shows the formation order of one multilayer laminated fiber. (A) is a schematic perspective view of a composite die used in the embodiment of Patent Document 1, and (b) is a schematic diagram showing a cross-sectional form of a composite fiber manufactured by the composite die of (a). (A) is a schematic cross-sectional view of a composite die used in the embodiment of Patent Document 2, and (b) is a schematic diagram showing a cross-sectional configuration of a multilayer laminated fiber manufactured by the composite die of (a). (A) is a schematic sectional view of a spin pack used in the embodiment of Patent Document 3, and (b) is a schematic view showing a mixer element used in the spin pack of (a). (A)-(g) is a schematic diagram explaining the formation order of the multilayer laminated fiber manufactured by the spinning pack of FIG. 11 (a). It is a schematic sectional drawing of the discharge plate used for another embodiment of this invention. (A)-(h) is schematic sectional drawing of the composite polymer discharge hole used for another embodiment of this invention. (I)-(n) is a schematic sectional view of a composite polymer ejection hole used in another embodiment of the present invention. (A)-(c) is schematic sectional drawing of the composite polymer discharge hole used for another embodiment of this invention. It is the schematic diagram which showed the multilayer laminated fiber of the elliptical shape manufactured by the composite die of this invention. FIG. 2 is a schematic view showing a triangular multilayer laminated fiber manufactured by the composite die according to the present invention.

  Hereinafter, with reference to the drawings, embodiments of a composite mouthpiece and a multilayer laminated fiber manufactured using the composite mouthpiece of the present invention will be described in detail.

  FIG. 3 is a schematic cross-sectional view of a composite die used in the embodiment of the present invention, and FIG. 4 is a schematic cross-sectional view of a composite die used in the embodiment of the present invention, a spin pack, and a cooling device. FIG. 4 is a view on arrow XX in the composite base of FIG. 3. Since FIG. 3 is a vertical cross-sectional view, only two discharge hole groups in which the first component polymer discharge holes 1 and the second component polymer discharge holes 2 are gathered are described. In this case, there are four ejection hole groups 46, the number of ejection hole groups 46 is not limited, and a plurality of ejection hole groups 46 may be provided. FIG. 6 is a schematic partial sectional view of the distribution plate and the lowermost distribution plate used in the embodiment of the present invention. These are schematic diagrams for accurately conveying the gist of the present invention, and the drawings are simplified. The composite mouthpiece of the present invention is not particularly limited, and the number of holes and grooves and the dimensional ratio thereof are described. Can be changed according to the embodiment.

  As shown in FIG. 4, the composite spinneret 16 used in the embodiment of the present invention is mounted on a spin pack 13 and fixed in a spin block 14, and a cooling device 15 is configured immediately below the composite spinneret 16. Therefore, the two-component polymer guided to the composite base 16 passes through the measuring plate 9, the distribution plate 6, and the lowermost distribution plate 5, and is discharged from the composite polymer discharge hole 27 of the discharge plate 10, respectively. After being cooled by the airflow blown out by the cooling device 15 and being provided with the oil agent, it is wound up as a multilayer laminated fiber. In FIG. 4, the annular cooling device 15 that blows out the airflow in the annular inward direction is employed, but a cooling device that blows out the airflow from one direction may be used. Further, as for the members provided on the upstream side of the weighing plate 9, the flow path used in the existing spinning pack 13 may be used, and it is not necessary to specially occupy the same.

  In addition, as shown in FIG. 3, the composite base 16 used in the embodiment of the present invention is formed by sequentially stacking the measuring plate 9, at least one or more distribution plates 6, the lowermost distribution plate 5, and the discharge plate 10. Preferably, the distribution plate 6 and the lowermost distribution plate 5 are formed of thin plates. In this case, the weighing plate 9 and the distribution plate 6, the distribution plate 6 and the lowermost distribution plate 5, and the lowermost distribution plate 5 and the discharge plate 10 are positioned by the positioning pins so that the center position (core) of the spinning pack 13 is aligned. After positioning and lamination, they may be fixed with screws or bolts, or may be metal bonded (diffusion bonded) by thermocompression bonding. In particular, since the distribution plates 6 and the distribution plate 6 and the lowermost distribution plate 5 use thin plates, it is preferable to perform metal bonding (diffusion bonding) by thermocompression bonding.

  Here, as a method for manufacturing the distribution plate 6 and the lowermost distribution plate 5, an etching process which is usually used for processing an electric / electronic component is preferable. Specifically, the thickness of the thin plate used for etching is preferably in the range of 0.01 to 1 mm, and more preferably in the range of 0.1 to 0.5 mm. By reducing the thickness of the thin plate, the diameter of the distribution holes 7 that can be formed in the distribution plate 6, the groove width of the distribution grooves 8, and the pitch between the holes and between the grooves can be reduced. Can be arranged densely.

  In addition, the discharge introduction hole 11 is provided with a constant approaching section from the lower surface of the lowermost distribution plate 5 in the direction of the spinning path of the polymer, so as to reduce the flow velocity difference immediately after the first component polymer and the second component polymer merge. To stabilize the composite polymer stream. Also, the contraction hole 12 in the present invention can reduce the size of the composite base 16 by setting the reduction angle α of the flow path from the discharge introduction hole 11 to the composite polymer discharge hole 27 in the range of 50 to 90 °, In addition, an unstable phenomenon such as draw resonance of the composite polymer stream can be suppressed, and the composite polymer stream can be stably supplied.

  As shown in FIG. 6, a plurality of distribution plates 6 are stacked in the composite base of the present invention. Each distribution plate 6 is provided with a distribution hole 7 for guiding the polymer in the direction of the spinning path of the polymer or a distribution groove 8 for guiding the polymer in a direction perpendicular to the direction of the spinning path of the polymer. Then, the distribution holes 7 located on the upstream side in the direction of the spinning path of the polymer and the distribution holes 7 located on the downstream side in the direction of the spinning path of the polymer communicate with each other through the distribution groove 8, and are formed in the distribution plate 6. The distribution plates 6 are stacked such that the number of distribution holes 7 increases toward the downstream side in the direction of the spinning path of the polymer. Further, a distribution hole 7 penetrating the distribution plate 6 and a distribution groove 8 penetrating the distribution plate 6 may be formed in one distribution plate 6, and the distribution holes 7 are formed in one surface of the distribution plate 6. However, the distribution groove 8 may be formed on the other surface, and the distribution hole 7 and the distribution groove 8 may be in communication. As described above, the distribution holes 6 and / or the distribution grooves 8 can be formed in the distribution plate 6 in various forms.

  First, an important point of the present invention, a multi-layer laminated fiber that does not depend on the incident angle of light, that is, a principle capable of obtaining a multi-layer laminated fiber having excellent uniformity in thickness of a single layer and having an extremely large number of layers will be described. I do.

  As described above, when the composite die of Patent Document 1 is used, a flat multilayered fiber laminated in one direction can be obtained. However, in this die structure, each layer does not depend on the incident angle of light. Cannot be obtained in a multilayer laminated fiber. In addition, since each polymer is supplied to the lamination forming channel 31 from one direction, unevenness in the supply of the polymer is likely to occur, which leads to unevenness in the thickness of the single layer. Therefore, as a method for forming a multilayer laminated fiber that does not depend on the incident angle of light, as shown in Patent Document 2, a plurality of introduction plates 42 are stacked, There is a method of alternately arranging annular flow paths for discharging two different polymers concentrically. However, as the number of layers of the multilayer laminated fiber increases, the number of introduction plates 42 constituting the base increases, and the whole base becomes large, which may deteriorate the handleability. In addition, when the present invention is applied to an existing die size, there is a limit in an annular flow path that can be arranged, so that it is not possible to manufacture a multi-layer laminated fiber having a very large number of layers. Since the introduction flow path is connected to the annular flow path from one direction, uneven supply of the polymer is likely to occur, which leads to uneven thickness of a single layer. In addition, if the composite base of Patent Document 3 is used, a multi-layer laminated fiber having a very large number of laminations may be obtained without depending on the incident angle of light. Problem has not been solved.

  Therefore, it is a very important technique to manufacture a multilayer laminated fiber having a uniform single-layer thickness and excellent independence on the incident angle of light, while suppressing the number of components constituting the base. Therefore, the present inventors have conducted intensive studies on the above-mentioned problem, which was not considered in the conventional technology, and as a result, have found a new technology of the present invention.

  That is, the composite mouthpiece according to the present invention includes one or more distribution plates 6 in which distribution holes 7 and / or distribution grooves 8 for distributing each polymer component are formed, and a downstream side of the distribution plates in the direction of the polymer spinning path. , A lowermost distribution plate 5 in which a plurality of first component polymer ejection holes 1 and a plurality of second component polymer ejection holes 2 are formed, a first component polymer ejection hole 1 and a second component polymer ejection hole 2 And a discharge plate 10 in which a composite polymer discharge hole 27 communicating with the discharge plate 10 is formed. Further, as shown in FIG. 1, the lowermost distribution plate 5 includes a first component polymer ejection hole array 3 in which at least a part of the first component polymer ejection holes 1 is arranged in a ring, and a second component polymer ejection hole 2. Are arranged so as to alternately surround the second component polymer ejection hole array 4 in which at least a part of the second component polymer is arranged in a ring shape.

  The composite die of the present invention employs a distribution type die using a distribution plate and a lowermost distribution plate. As shown in FIG. 6, different two-component polymers (first component polymer) introduced from the measuring plate 9 are used. And the second component polymer) by alternately stacking distribution plates 6 having distribution holes 7 and / or distribution grooves 8 for guiding the polymer in a direction perpendicular to the downstream of the spinning path of the polymer. The hole density of the first component polymer ejection holes 1 or the second component polymer ejection holes 2 that can be arranged in the lower layer distribution plate 5 can be increased in each stage, and by arranging these polymer ejection holes alternately in rows. The number of layers can be very large. Further, since the hole density of the lowermost distribution plate is very high, one discharge hole group 46 in which the first component polymer discharge holes 1 and the second component polymer discharge holes 2 are put together is formed into one composite base 16 (one sheet). A plurality of composite polymer discharge holes 27 communicating with the respective discharge hole groups 46 in one composite base 16 (one discharge plate 10). Since they can be arranged, a multifilament can be formed. In addition, since each layer of the multilayer laminated fiber forms one ring-shaped layer by an aggregate of discharge holes that can easily achieve a uniform discharge amount, a multilayer laminated fiber excellent in uniformity of the thickness of each layer is obtained. I can do it. Hereinafter, a layer formed of the first component polymer of the multilayer laminated fiber is referred to as a first component resin layer, and a layer formed of the second component polymer is referred to as a second component resin layer.

  In FIG. 1, the first component polymer ejection hole array 3 and the second component polymer ejection hole array 4 have a first polymer ejection hole 1 and a second component polymer ejection hole 2 arranged on the same circumferential line of each layer. However, the present invention is not limited to this, and as shown in FIGS. 2A and 2B, even if the center position of the polymer ejection hole is shifted from the same circumferential line in the outer circumferential direction or the inner circumferential direction. It does not matter, and the polymer ejection hole array may have a two-row configuration.

  In the present invention, the formation of the fiber structure laminated concentrically in multiples can be achieved by employing a distribution system base using the distribution plate 6 and the lowermost distribution plate 5. As described above, since the number of the first component polymer ejection holes 1 and the number of the second component polymer ejection holes 2 that can be arranged in the lowermost distribution plate 5 can be increased to the maximum, the configuration of the measuring plate 9 and the ejection plate 10 can be increased. A lowermost distribution plate in which the number and arrangement of the first component polymer ejection holes 1 and the second component polymer ejection holes 2 forming each layer are changed according to the desired specification of the multilayer laminated fiber while using the same material. 5 is determined, and only the flow path (the diameter and length of the distribution hole 7 of the distribution plate 6 and the width and length of the distribution groove 8) leading to the polymer discharge hole is designed to reduce the number of laminations. Various forms of multi-layer laminated fibers can be obtained, for example, by changing the thickness or by inclining the thickness of each layer. Further, since the distribution plate 6 and the lowermost distribution plate 5 are thin plates each having a thickness in the range of 0.01 to 0.5 mm, the total thickness is at most 3 to 5 mm even if the number of distribution plates 6 is increased. This makes it possible to obtain a multi-layer laminated fiber having an enormous number of laminations, while keeping the total length of the base substantially equal to that of the existing base.

Further, as another embodiment of the lowermost distribution plate 5 of the present invention, all the adjacent polymer ejection hole arrays formed on the lowermost distribution plate 5 are polymer ejection hole arrays forming the m-th layer from the innermost layer side. When the number of holes is Nm and the number of holes in the polymer ejection hole array forming the (m + 1) th layer is Nm + 1, it is preferable that the arrangement is made so as to satisfy the following expression (1).
(1) Nm + 1 / Nm = (2m + 1) / (2m-1) (where m is a natural number)
By arranging the polymer ejection holes so as to satisfy the formula (1), it is possible to obtain a multilayer laminated fiber having a uniform thickness of each layer.

Here, the derivation of equation (1) will be described in detail. When the diameters of the polymer discharge holes in the lowermost distribution plate 5 are all the same, the volume discharge amount Qm of the polymer forming the m-th layer is determined by the area of the discharge holes to the number Nm of the discharge holes constituting the m-th layer. Multiplied by. Further, since the cross-sectional area ratio of each layer becomes equal to the volume discharge ratio of the polymer forming each layer, the following equation (i) is established.
・ R1 ^ 2: (R2 ^ 2-R1 ^ 2) :( R3 ^ 2-R2 ^ 2): ... :( Rm ^ 2-Rm-1 ^ 2)
= Q1: Q2: Q3: ...: Qm
= N1: N2: N3: ...: Nm (i)
Here, Rm indicates the radius of the laminated fiber up to the m-th layer.

In order to obtain a multi-layer laminated fiber having a constant thickness of each layer, the radius Rm of the laminated fiber up to the m-th layer is given by: Rm = m × R1 (where m is a natural number)
It is necessary to

Substituting the expression (ii) into the left side of the expression (i) and rearranging the expression, the ratio of the number of holes forming each layer becomes
N1: N2: N3: ...: Nm = 1: 3: 5: ...: 2m-1 (iii)
Therefore, when the number of holes in the polymer discharge hole array forming the innermost layer is Na, the number Nm of polymer discharge holes for forming the m-th layer can be expressed by the formula (iv). .
Nm = (2m-1) × Na (iv).

  By taking the ratio of the number of polymer discharge holes Nm for forming the m-th layer to the number of polymer discharge holes Nm + 1 for forming the (m + 1) -th layer from the formula (iv), formula (1) is derived. can do. Therefore, when the polymer ejection holes are arranged so as to satisfy the expression (1), it is possible to obtain a multilayer laminated fiber in which the thickness of the adjacent layer is uniform.

Next, a description will be given of an example of the arrangement of polymer ejection holes when the layer thickness is increased or decreased toward the outer layer. First, when the die size and the fiber diameter and the number of layers of the desired multilayer laminated fiber are determined, if the diameter of the polymer discharge hole and the outer diameter of the discharge introduction hole are constant, it is necessary to form one discharge hole group. The total number _NL of the polymer discharge holes can be roughly determined. When the hole number _{N L} constituting the discharge hole groups is determined, relation of the ratio of the sectional area _{S L} and its discharge amount _{Q L} of the multi-layer laminated fiber _{(Q L: Qn = S L} × N L: S n × N n ) from, in one optional layer, it is possible to obtain the number of pores n _n of the polymer discharge holes required to obtain the cross-sectional area S _n as a layer thickness for the desired. Based on this idea, when increasing or decreasing the thickness of the layer toward the outer layer, the number of holes required to form the next layer is determined in order based on the thickness of the innermost layer. The number and arrangement of the polymer discharge holes can be easily determined.

  According to a preferred embodiment of the present invention, it is preferable that the mass flow rates discharged from the respective polymer discharge holes 1 and 2 are the same. Therefore, it is preferable that the diameter and length of the distribution hole 7 formed in each distribution plate 6 and the width and length of the distribution groove 8 be the same for each polymer component. With such a configuration, the flow path pressure loss from the measuring plate 9 to each of the polymer discharge holes 1 and 2 can be equalized. As a result, the difference in the discharge amount from each polymer discharge hole is reduced, and the uniformity of the single layer thickness of the multilayer laminated fiber can be improved. Here, the flow path pressure loss occurs over the entire length of the flow path until the polymer of each component is supplied from the extruder and discharged through the composite polymer discharge hole 27. Since the flow path pressure loss generated on the downstream side is dominant, the flow path pressure loss from the distribution plate 6 to the discharge plate 10 may be equalized.

  Here, the thickness of each layer of the multilayer laminated fiber tends to increase as the number of layers in which two resin layers are alternately laminated increases, but the variation in the thickness of each layer tends to increase. A multilayer laminated fiber having a thickness variation of 1 to 20% can be produced.

  In the multilayer laminated fiber obtained by the composite mouthpiece 16 of the present invention, the thickness of each of the adjacent first component resin layer and second component resin layer is increased at an arbitrary ratio from the center of the multilayer laminated fiber toward the outer layer side. Or, it is also effective in the case of producing a thin multilayer laminated fiber. By gradually increasing or decreasing the layer thickness, incident light can be reflected not only at an arbitrary wavelength but also over a wide area. Further, setting the ratio of the thickness of the thinnest layer to the thickness of the thickest layer to be between 1.1 and 3.0 is preferable because the wavelength range of visible light can be covered in a wide range. In this case, the peak wavelength of the interference light does not occur, and a broad wavelength is generated. In order to increase the reflection efficiency of the obtained multilayer laminated fiber, it is effective to reduce the thickness of the single layer and increase the number of layers.

  Regarding the number of laminations, it is preferable that the total number of layers including the first component resin layer and the second component resin layer is 40 or more, but more preferably 60 or more. With 60 or more layers, the reflectance of incident light can be made almost 100%. However, if the thickness of the single layer is reduced, separation between the layers of the laminated fiber is likely to occur. Therefore, in order to suppress delamination, the outermost layer of the laminated fiber is preferably thicker than the other layers.

  Further, the shape of the multilayer laminated fiber 34 is preferably an elliptical shape as shown in FIG. By making the shape oval, that is, by aligning the orientation with the multilayer laminated structure, the reflection efficiency of the obtained multilayer laminated fiber can be enhanced, and a fiber having a higher coloring property can be obtained. Here, the ratio d1 / d2 of the major axis d1 and the minor axis d2 of the multilayer laminated fiber is preferably 1 or more and 10 or less. It is more preferably 5 or less, and particularly preferably 2 or less from the viewpoint of the texture and the degree of freedom of higher-order processing.

Next, another embodiment of the present invention will be described with reference to FIGS.
FIG. 7 is a schematic sectional view of a composite die used in another embodiment of the present invention. FIG. 8 shows a composite polymer flow in the YY and ZZ cross sections when the composite die of FIG. 7 is used. FIG. 3 is a schematic arrow view showing a cross-sectional state of a polymer discharge hole. The two-component polymer guided to the composite base 16 is separately introduced into two streams of an upper part and a lower part. The component polymer streams supplied to the upper section pass through the upper metering plate 17, the upper distributor 18 and the upper lowermost distributor 19 and merge to form a composite polymer stream having an annular multilayer laminated structure. The cross section is reduced through the upper contraction hole 21 of the upper contraction plate 20 and flows down the upper introduction hole 23 communicating with the upper contraction hole 21 of the lower measurement plate 22 (Y-Y section in FIG. 8). . On the other hand, the component polymer flows supplied to the lower portion through the lower introduction holes 24 penetrating the upper weighing plate 17, the upper distribution plate 18, and the upper lowermost distribution plate 19 pass through the lower weighing plate 22 and the lower distribution plate 25. Then, the liquid is discharged from the lowermost lowermost distribution plate 26 to the contraction holes 12. At this time, the polymer of each component discharged through the lower lowermost layer distribution plate 26 joins in a state where an annular layer is formed so as to surround the annular composite polymer flow flowing down the upper introduction hole 23 (see FIG. 8). ZZ section). The composite polymer flow that has merged is discharged from the composite polymer discharge holes 27 of the discharge plate 10, whereby a multilayer laminated fiber can be obtained.

  As described above, by forming the composite base 16 in a two-stage configuration, the composite polymer flow having the multilayered laminated structure formed in the upper part is once reduced by the upper-stage contraction plate 20, so that the space in the base of the base is reduced. The distribution hole and the distribution groove can be arranged in the lower distribution plate 25 by utilizing the created space. Thereby, since the polymer discharge holes 1 or 2 can be arranged in the lowermost lowermost layer distribution plate 26, more multi-layer laminated fibers can be obtained. In other words, once the annular polymer stream formed in the upper part is contracted, a cyclic polymer stream is formed around it, and this is repeated, whereby a composite polymer stream having an extremely large layer structure can be formed. . In FIG. 7, the composite ferrule has a two-stage structure, but may have a multi-stage structure having three or more stages.

Next, each member and the shape of each member common to the composite base 16 of the embodiment of the present invention shown in FIGS. 3, 4, and 7 will be described in detail.
The composite base 16 in the present invention is not limited to a circular shape, but may be a quadrangle or a polygon. The arrangement of the composite polymer discharge holes 27 in the composite die 16 may be appropriately determined according to the number of multifilament yarns, the number of yarns, and the cooling device 15.

  The cross section of the composite polymer discharge hole 27 in the direction perpendicular to the direction of the spinning path of the polymer is not limited to a round shape, and may be a cross sectional shape other than a round shape. For example, FIG. 13 is a schematic cross-sectional view of the discharge plate 10 according to the present invention as viewed from a direction perpendicular to the direction of the spinning path of the polymer. The uniformity improves the reflection efficiency of the multi-layer laminated fiber, so that a fiber having a higher coloring property can be obtained.

  The cross section of the composite polymer discharge hole 27 in the direction perpendicular to the direction of the spinning path of the polymer has at least two types of at least one type selected from the group consisting of an elliptical shape, a rectangular shape, an hourglass shape, and a flat shape. A shape in which only one end is overlapped may be used. For example, in FIGS. 14A (a) to (h) and FIGS. 14B (e) to (n), the shape of the composite polymer discharge hole 27 is selected from the group consisting of an ellipse 47, a rectangle 48, an hourglass 49, and a flat shape 50. A case is shown in which four of at least one type are selected and one ends thereof are overlapped with each other to form a cross shape. 14A (a) to 14 (d) show a shape in which only one of the ellipse 47, the rectangle 48, the hourglass 49, and the flat shape 50 is selected, and only one end of each is overlapped. FIGS. 14A (e) to 14 (h) and FIGS. 14B (i) to 14 (m) show four or more shapes selected from two or more of an ellipse 47, a rectangle 48, an hourglass 49, and a flat shape 50. Is a shape in which only one end is overlapped. FIG. 14B (n) shows a shape in which an ellipse 47, a rectangle 48, an hourglass 49, and a flat shape 50 are selected one by one, and only one end of each is overlapped. By adopting such a discharge hole shape, a multi-layer laminated fiber having a cross-shaped cross section can be obtained, whereby a fiber having a structural coloring property in an arbitrary direction can be obtained. In the present embodiment, the example in which the composite polymer ejection hole has a cross shape has been described.

  The cross section of the composite polymer discharge hole 27 in the direction perpendicular to the direction of the spinning path of the polymer may be polygonal. 15A to 15C show examples in which the shape of the composite polymer discharge hole 27 is triangular, quadrangular, or pentagonal. Even if the shape of the composite polymer discharge hole 27 is polygonal, it is possible to obtain a multilayer laminated fiber having a structural coloring property in an arbitrary direction. For example, FIG. 17 shows a multilayer laminated fiber having a triangular cross-sectional shape. It is preferable that the outer edge line of the fiber is a straight line parallel to a line segment 52 connecting the center points of the circles 51 inscribed at the corners of the fiber, but the outer peripheral side (FIG. 17A) or the center of the fiber It may be curved to the side (FIG. 17B).

  When the composite polymer discharge hole 27 has a cross-sectional shape other than the round shape, it is preferable to increase the length of the composite polymer discharge hole 27 in order to ensure the polymer measurement performance. The first component polymer ejection hole 1 and the second component polymer ejection hole 2 in the present invention are not limited to a circular cross section in a direction perpendicular to the direction of the spinning path of the polymer, but may have a cross section other than the round shape. You may.

  Next, the multilayer laminated fiber obtained by the composite mouthpiece 16 of the present invention means a fiber in which two different polymer components are combined, and resin layers of different components are alternately arranged in a ring in a fiber cross section. Fiber in a certain form. Here, it is preferable to select a polymer having a large difference in refractive index between the two polymers. By increasing the difference in refractive index, it is possible to enhance the structural coloring effect due to light interference. As a combination of polymers having a difference in refractive index, a combination of polylactic acid and polybutylene terephthalate, and a combination of nylon 6 and low amorphous / copolymerized polyethylene terephthalate are considered, but if there is a difference in refractive index between the two polymers, It is not limited to this. The single yarn cross section of the fiber obtained by the composite die 16 of the present invention may be not only a round shape but also a shape other than a round shape such as a triangle or a flat shape or a hollow shape. In addition, the present invention is a highly versatile invention, and is not particularly limited by the single yarn fineness of the fiber, and is not particularly limited by the number of yarns of the conjugate fiber, and is one yarn. Alternatively, a multifilament having two or more yarns may be used. However, the effect of the present invention becomes more remarkable when the single yarn fineness is small and when the number of yarns is large. The effect of the present invention is more remarkable when the number of the multilayer laminated fibers obtained from one composite die 16 is plural.

  Hereinafter, the effects of the composite mouthpiece of the present embodiment will be specifically described with reference to examples.

(1) Single layer thickness of multilayer laminated fiber and variation in single layer thickness (CV%)
The obtained multifilament composed of the multilayer laminated fiber is embedded in an epoxy resin, frozen with a Reichert FC / 4E cryosectioning system, and cut with a Reichert-Nissei ultracut N (ultramicrotome) equipped with a diamond knife. The cut surface was photographed at a magnification of 5000 with a VE-7800 scanning electron microscope (SEM) manufactured by Keyence Corporation. Ten randomly selected fibers are extracted from the obtained photograph, and are located on a line obtained by drawing eight straight lines every 45 degrees through the center of the fiber cross section using image processing software (WINROOF). The thickness of each layer was measured (at eight locations per layer). The average single-layer thickness and the standard deviation of the single-layer thickness at eight points in the circumferential direction were calculated for each layer, and the variation CV% (coefficient of variation) of the single-layer thickness was calculated from these results based on the following equation.
-Single layer thickness variation (CV%) = (Single layer thickness standard deviation / Average single layer thickness) x 100.

(2) Measurement of peak wavelength of interference light The peak wavelength of interference light in a cross section orthogonal to the length direction of the obtained multilayer laminated fiber was measured with a visible ultraviolet absorption spectrometer (V-570 manufactured by JASCO Corporation). .

(3) Fineness The multifilament composed of the multi-layered laminated fiber was extracted, the weight of 1 m was measured, and the fineness was calculated by multiplying 10,000 times. This was repeated 10 times, and the value obtained by rounding off the second decimal place of the simple average value was defined as fineness.

(4) Melt Viscosity of Polymer Melt viscosity of the chip-shaped polymer was measured with a vacuum drier at a moisture content of 200 ppm or less and the strain rate was changed stepwise by “Capillograph 1B” manufactured by Toyo Seiki Co., Ltd. The measurement temperature is the same as the spinning temperature, and the melt viscosity of 1216 s ^-1 is described in Examples and Comparative Examples. Incidentally, the measurement was carried out in a nitrogen atmosphere by setting the sample to 5 minutes from the time the sample was put into the heating furnace to the start of the measurement.

(5) Intrinsic viscosity [η]
The measurement was performed at 25 ° C. using orthochlorophenol as a solvent.

(6) 98% sulfuric acid relative viscosity [ηr]
(A) A sample is weighed and dissolved in 98% by weight concentrated sulfuric acid so that the sample viscosity C is 1 g / 100 ml.
(B) The solution of item (a) is dropped at 25 ° C. using an Ostwald viscometer and the number of drops T1 is measured.
(C) Measure the number of seconds T2 of falling at 25 ° C. of 98% by weight concentrated sulfuric acid in which the sample is not dissolved.
(D) The relative viscosity ηr of 98% sulfuric acid of the sample is calculated by the following equation. The measurement temperature is 25 ° C.
ηr = (T1 / T2) + {1.891 × (1.000−C)}.

[Example 1]
After melting a polyethylene terephthalate (PET) having an intrinsic viscosity [η] of 0.65 as a first component polymer and a chip (nylon 6) having a 98% sulfuric acid relative viscosity ηr of 2.8 as a second component polymer at 280 ° C. , Weighed, and flowed into the composite die according to the present embodiment shown in FIG. 2 to discharge a composite polymer stream from the die discharge hole. The volume ratio of the first component polymer and the second component polymer was set to 50/50, and after cooling and solidifying the discharged composite polymer stream, an oil agent was applied and wound at a spinning speed of 1500 m / min, and 168 dtex-18 filament (single) Undrawn fibers having a hole discharge rate of 4 g / min) were collected. The wound undrawn fiber was drawn 3.0 times between rollers heated to 90 ° C. and 130 ° C. to obtain a multi-layer laminated fiber of 56 dtex-18 filaments.

  Here, the composite base used in Example 1 has a distribution plate in which distribution holes are perforated and a distribution plate in which distribution grooves are perforated, which are alternately stacked, and the downstream side of the distribution plate as shown in FIG. A lower distribution plate is laminated. In the lowermost distribution plate, the first component polymer ejection holes and the second component polymer ejection holes are alternately arranged in an annular shape, and a 40-layer annular row (40 rows in the center with one row toward the outer periphery). Annular rows) are formed. The number of polymer ejection holes is 1 in the first row, 3 in the second row, 5 in the third row, and 79 in the 40th row (2m-1 in the mth row). (M is a natural number)), and these form one ejection hole group. Eighteen composite polymer discharge holes communicating with the discharge hole group are formed. The thickness of the lowermost distribution plate is 0.1 mm, and the first component polymer ejection holes and the second component polymer ejection holes are arranged with a hole diameter of 0.2 mm and a minimum inter-hole pitch of 0.4 mm. As shown in Table 1, the fiber diameter of the obtained multifilament was 14 μm, the variation in the single layer thickness of the resin layer was 10.4%, the peak wavelength of the interference light of the multilayer laminated fiber was 320 nm, and the structural coloring was obtained. was gotten.

[Example 2]
This example was performed to confirm the effect of increasing the thickness of the resin layer of the multilayer laminated fiber from the center toward the outer periphery. The annular row was composed of 36 layers, and the first row was 1, the second row was 4, the third row was 8, the fourth row was 12, and the 36th row was 140 polymer discharge holes. The number of polymer discharge holes in each row was such that the thickness of each layer became thicker toward the outer layer. Otherwise, the same composite spinneret and spinning conditions as in Example 1 were used. As described in Table 1, the fiber diameter of the obtained multifilament was 14.4 μm, the variation of the single layer thickness of the resin layer was 16.2%, and the peak wavelength of the interference light of the multilayer laminated fiber did not occur. A color development effect of iridescent color was obtained.

[Example 3]
This example was performed to confirm the effect of the thickness of the resin layer of the multilayer laminated fiber. The ring example has 60 layers, 1 in the first column, 3 in the second column, 5 in the third column, and 119 in the 60th column (2m-1 (m is a natural number) in the mth column) 2), and the same composite spinneret and spinning conditions as in Example 1 were used. As shown in Table 1, the fiber diameter of the obtained multifilament was 14.4 μm, the variation of the single layer thickness of the resin layer was 18.0%, and the peak wavelength of the interference light of the multilayer laminated fiber was 210 nm, and the structure was Sexual coloring was obtained.
[Example 4]
In order to confirm the effect of flattening the multilayer laminated fiber, the present example was implemented. A discharge plate having a composite polymer discharge hole having an elliptical cross section was used, and the same composite spinneret and spinning conditions as in Example 1 were used except for that. As described in Table 1, the major axis d1 of the obtained multifilament was 22.9 μm, the minor axis d2 was 15.3 μm, the single layer thickness variation of the resin layer was 13.3%, and the interference light of the multilayer laminated fiber was The peak wavelength was 330 nm, and deep structural coloring was obtained.
[Example 5]
This example was performed to confirm the effect of deforming the multilayer laminated fiber. A discharge plate having a composite polymer discharge hole having a triangular shape was used, and the same composite spinneret and spinning conditions as in Example 1 were used except for that. As shown in Table 1, the circumscribed circle diameter of the obtained multifilament was 22.1 μm, the variation in the single-layer thickness of the resin layer was 14.8%, and the peak wavelength of the interference light of the multilayer laminated fiber was 310 nm, which was high. A structural color was obtained.

[Comparative Example 1]
As shown in FIG. 10, the introduction plate was configured so that 15 annular flow paths could be formed, and the introduction flow path was formed from one circumferential direction in the annular flow path. The same spinning conditions were used. With the same spinneret size as in Example 1, it was limited to arrange 15 annular channels. As shown in Table 1, the fiber diameter of the obtained multifilament was 14 μm, and the variation in the single-layer thickness of the resin layer was deteriorated to 28.8%. The peak wavelength of the interference light of the multilayer laminated fiber was 800 nm, and no structural coloring was obtained.

  The present invention is not limited to the composite spinneret used in the general solution spinning method, but can be applied to the melt blow method and the spunbond method, and can also be applied to the wet spinning method and the spinneret used in the dry-wet spinning method. However, the application range is not limited to these.

1: First component polymer ejection hole 2: Second component polymer ejection hole 3: First component polymer ejection hole array 4: Second component polymer ejection hole array 5: Lowermost distribution plate 6: Distribution plate 7: Distribution hole 8: Distribution groove 9: Measuring plate 10: Discharge plate 11: Discharge introduction hole 12: Shrinkage hole 13: Spinning pack 14: Spin block 15: Cooling device 16: Composite base 17: Upper measuring plate 18: Upper distributing plate 19: Uppermost Lower distributing plate 20: Upper contracting plate 21: Upper contracting hole 22: Lower measuring plate 23: Upper introducing hole 24: Lower introducing hole 25: Lower distributing plate 26: Lower lowermost distributing plate 27: Composite polymer discharge hole 28: Polymer A introduction channel 29: Polymer B introduction channel 30: Group of apertures 31 for supplying polymer A: Laminate forming channel 32: Funnel-shaped channel 33: Core-sheath forming channel 34: Multi-layer laminated fiber 35 : Core component resin layer 36: first component resin layer 37: first Component resin layer 38: Core component polymer introduction channels 39a, 39b, 39c: First component polymer introduction channels 40a, 40b, 40c: Second component polymer introduction channel 41: Guide pipe 42: Introduction plate 43: Static mixer 44: Dividing plates 45a, 45b: Mixer element 46: Discharge hole group 47: Oval shape 48: Rectangular shape 49: Hourglass shape 50: Flat shape 51: Inscribed circle 52: Line segment 53: Outer line A: Polymer A
B: Polymer B
C: protective layer polymer d1: major axis of multilayer laminated fiber d2: minor axis of multilayer laminated fiber

Claims (13)

A composite mouthpiece for discharging a composite polymer stream composed of a first component polymer and a second component polymer,
One or more distribution plates formed with distribution holes and / or distribution grooves for distributing each polymer component;
A lowermost distribution plate which is located downstream of the distribution plate in the direction of the polymer spinning path and in which a plurality of first component polymer ejection holes and a plurality of second component polymer ejection holes are formed;
A discharge plate, which is located downstream of the lowermost distribution plate in the direction of polymer spinning, and has a composite polymer discharge hole formed in communication with the first component polymer discharge hole and the second component polymer discharge hole. Has been
In the lowermost distribution plate, a first component polymer ejection hole array in which at least a part of the first component polymer ejection holes are arranged in a ring, and at least a part of the second component polymer ejection holes are arranged in a ring. And a discharge hole group alternately surrounded by the second component polymer discharge hole array.
The discharge plate is formed with two or more composite polymer discharge holes communicating with the discharge hole group ,
A composite mouthpiece wherein the shape of the composite polymer discharge hole is elliptical . A composite mouthpiece for discharging a composite polymer stream composed of a first component polymer and a second component polymer,
One or more distribution plates formed with distribution holes and / or distribution grooves for distributing each polymer component;
A lowermost distribution plate which is located downstream of the distribution plate in the direction of the polymer spinning path and in which a plurality of first component polymer ejection holes and a plurality of second component polymer ejection holes are formed;
A discharge plate, which is located downstream of the lowermost distribution plate in the direction of polymer spinning, and has a composite polymer discharge hole formed in communication with the first component polymer discharge hole and the second component polymer discharge hole. Has been
In the lowermost distribution plate, a first component polymer ejection hole array in which at least a part of the first component polymer ejection holes are arranged in a ring, and at least a part of the second component polymer ejection holes are arranged in a ring. And a discharge hole group alternately surrounded by the second component polymer discharge hole array.
The discharge plate is formed with two or more composite polymer discharge holes communicating with the discharge hole group,
Wherein the shape of the composite polymer discharge hole, oval, rectangular, two or more of at least one kind of shape selected from the group consisting of hourglass and flat shaped, Ru shape der superimposed each end only complex Base. A composite mouthpiece for discharging a composite polymer stream composed of a first component polymer and a second component polymer,
One or more distribution plates formed with distribution holes and / or distribution grooves for distributing each polymer component;
A lowermost distribution plate which is located downstream of the distribution plate in the direction of the polymer spinning path and in which a plurality of first component polymer ejection holes and a plurality of second component polymer ejection holes are formed;
A discharge plate, which is located downstream of the lowermost distribution plate in the direction of polymer spinning, and has a composite polymer discharge hole formed in communication with the first component polymer discharge hole and the second component polymer discharge hole. Has been
In the lowermost distribution plate, a first component polymer ejection hole array in which at least a part of the first component polymer ejection holes are arranged in a ring, and at least a part of the second component polymer ejection holes are arranged in a ring. And a discharge hole group alternately surrounded by the second component polymer discharge hole array.
The discharge plate is formed with two or more composite polymer discharge holes communicating with the discharge hole group,
The composite spinneret shape of the composite polymer discharge holes Ru polygonal der A method for producing a multilayer laminated fiber by using a composite spinning machine using the composite die according to any one of claims 1 to 3 . A first component resin layer formed of a first component polymer and a second component resin layer formed of a second component polymer are alternately laminated concentrically, and the thickness of each layer varies from 1 to 20% . A laminated fiber,
The multilayer laminated fiber, wherein the total number of the first component resin layer and the second component resin layer of the multilayer laminated fiber is 60 or more . The thickness of each layer adjacent to the multilayer laminated fiber is thicker or thinner at an arbitrary ratio from the center of the fiber toward the outer layer, and the ratio of the thickness of the thinnest layer to the thickness of the thickest layer is 1.1 to 1.0. 6. The multilayer laminated fiber of claim 5 , wherein the fiber is 3.0. 7. The multilayer laminated fiber according to claim 5 , wherein a fiber cross section of the multilayer laminated fiber is elliptical, and a ratio of a major axis d1 to a minor axis d2 of the fiber section satisfies 1 <d1 / d2 <10. The fiber cross section of the multilayer laminated fiber is a polygon, and each side constituting the outer edge of the polygon is more polygonal than a line parallel to a line connecting the center points of circles inscribed at each corner of the polygon. The multilayer laminated fiber according to claim 5 , wherein the multilayer laminated fiber is curved toward the center side or the outer peripheral side. A first component resin layer formed of a first component polymer and a second component resin layer formed of a second component polymer are alternately laminated concentrically, and the thickness of each layer varies from 1 to 20%. A laminated fiber,
The thickness of each layer adjacent to the multilayer laminated fiber is thicker or thinner at an arbitrary ratio from the center of the fiber toward the outer layer, and the ratio of the thickness of the thinnest layer to the thickness of the thickest layer is 1.1 to 1.0. A multilayer laminated fiber that is 3.0. The multilayer laminated fiber according to claim 9, wherein a fiber cross section of the multilayer laminated fiber is elliptical, and a ratio of a major axis d1 to a minor axis d2 of the fiber section satisfies 1 <d1 / d2 <10. The fiber cross section of the multilayer laminated fiber is a polygon, and each side constituting the outer edge of the polygon is more polygonal than a line parallel to a line connecting the center points of circles inscribed at each corner of the polygon. The multilayer laminated fiber according to claim 9, which is curved toward the center side or the outer peripheral side of the multilayer fiber. A first component resin layer formed of a first component polymer and a second component resin layer formed of a second component polymer are alternately laminated concentrically, and the thickness of each layer varies from 1 to 20%. A laminated fiber,
  A multilayer laminated fiber in which the fiber cross section of the multilayer laminated fiber is elliptical, and the ratio of the major axis d1 to the minor axis d2 of the fiber section satisfies 1 <d1 / d2 <10. A first component resin layer formed of a first component polymer and a second component resin layer formed of a second component polymer are alternately laminated concentrically, and the thickness of each layer varies from 1 to 20%. A laminated fiber,
  The fiber cross section of the multilayer laminated fiber is a polygon, and each side constituting the outer edge of the polygon is more polygonal than a line parallel to a line connecting the center points of circles inscribed at each corner of the polygon. Multi-layer laminated fiber that is curved toward the center or outer periphery of the fiber.

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