JP3673812B2 - Method for producing composite polymer fiber and spinneret therefor - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a novel optical functional fiber having a visible ray, ultraviolet ray, infrared ray reflection and interference function, a spinneret for producing the fiber, and a method for producing the same.
[0002]
[Prior art]
In recent years, due to the appeal for the high-quality texture of fabrics, sensation fibers such as bulges have been developed by using simple round cross-section yarns and deformed cross-sections, and by combining two or more types of fibers, and flowered as new synthetic fibers. Recently, fibers having higher sensitivity and function have been demanded. One of them is deep color and gloss. However, if you try to satisfy both deep color and luster at the same time, you can get deep colors, but the colors become dull and you lose vividness. In the past, there was no technology that was compatible. The cause is that in the prior art, the color is developed by dyes and pigments, and the color is developed by absorption of light, so the more you try to obtain deep colors, the less reflected light, and the gloss has been lost. . However, when looking at the natural world, for example, beetles and morpho butterflies satisfy deep color and luster at the same time. Unlike dyes and pigments, they have deep color and luster simultaneously. As the coloring mechanism, light reflection and interference are utilized, and various studies have been conducted on whether this mechanism can be utilized even in synthetic fibers. For example, Japanese Patent Publication No. 43-14185 discloses a coated composite fiber having a pearly luster composed of three layers. However, when the number of layers is three at most, the coloration is surely seen by reflection and interference, but the degree is limited, and it is insufficient for the demand for high sensitivity.
[0003]
Multilayer fibers having substantially parallel interfaces are obtained by alternately joining different polymers in a spinning pack having a static mixer as described in, for example, Japanese Patent Publication No. 60-1048. It can be obtained by discharging the polymer from the discharge hole. An example of a composite fiber composed of polyethylene terephthalate and nylon 6 laminated with components on a multilayer film using this static mixer is shown, and a woven fabric having a pearly luster is obtained. However, when trying to obtain a multi-layer fiber by the method described in Japanese Patent Publication No. 60-1048, laminar flow is turbulent little by little during the joining of two polymers, and a moderate multi-layer is obtained, but optical accuracy is obtained. It was insufficient to obtain a multilayer with controlled layer thickness. In particular, when trying to obtain a multilayer of 10 layers or more, the number of times of joining is required to be repeated several times or more, and interference light can be obtained due to the disturbance of the interlayer thickness, but the strength is insufficient. In addition, interference light of various wavelengths, that is, color turbidity was observed, and only a color insufficient in sensitivity was obtained.
[0004]
Further, Japanese Patent Publication No. 57-20842 discloses a static fluid mixing apparatus, Japanese Patent Publication No. 53-8806, and Japanese Patent Publication No. 53-8807, which show a mixed spinning method and apparatus. These repeated joining and separation of two types of polymers, and due to the complexity of the polymer flow, they were not sufficient to produce optically sized multilayers where mixing occurred.
Further, Japanese Patent Application Laid-Open No. 62-170510 discloses a method for obtaining an interference color by providing fine irregularities on the fiber surface. This method is intended to form a diffraction grating on a fiber. A similar method is also disclosed in Japanese Patent Laid-Open No. 4-202805. In these fibers, although coloration due to interference is recognized, the interference wavelength is easily different depending on the viewing angle, i.e., the color of the fabric is changed, so that only low sensitivity is obtained. Absent.
[0005]
On the other hand, in Japanese Laid-Open Patent Publication Nos. 59-228042, 60-24847, 63-64535, etc., the morpho of South America is famous for having a vivid color effect by changing the color tone according to the viewing angle. Coloring fibers and fabrics inspired by butterflies have been proposed. However, the fibers used in these inventions are flat yarns in which different polymers are laminated, and even if they are laminated, it is difficult to obtain a thickness that interferes with light. It plays only the role of restraint.
On the other hand, JP-A-54-42421 discloses a multi-layer laminated fiber of different polymers. However, the method described in the publication is to arrange the multilayer portion in a hollow ring shape, and to obtain ultrafine fibers by dissolving one component, and the interference effect is obtained by matching the multilayer stack with the optical dimensions. It does not give any suggestion for the fiber obtained.
[0006]
Furthermore, as the fiber, those disclosed in JP-A-7-34320, JP-A-7-195603, and JP-A-7-331532 have been proposed that develop color without using ordinary dyes and pigments. A fiber structure has been proposed in which two types of different polymers are alternately laminated and the optical thickness thereof is controlled to realize non-dyed fibers and to add an ultraviolet / infrared reflecting function.
[0007]
On the other hand, a material that develops color by making a molecularly oriented anisotropic film a sandwich structure with a polarizing film has also been published (for example, Journal of Textile Machinery Society Vol.42, No.2, P55 (1989), Vol. 42, No. 10, P160 (1989)). Further, in JP-A-7-97766 and JP-A-7-97786, light having a substantially transparent thin film layer that can be colored by reflected light incident on the surface of the fabric from the front side and reflected light on the back side. The interference caused by these thin films in which a fiber fabric provided with an interference film is disclosed has an interference wavelength that varies easily depending on the viewing angle, that is, the color of the fabric changes, and only an inexpensive sensibility is obtained.
[0008]
[Problems to be solved by the invention]
As described above, a method for producing a fiber having a multilayered laminated structure having optical accuracy, having a uniform reflected light wavelength, that is, producing a single color and having a sufficient light interference effect, and a die suitable for it Is not disclosed yet. Therefore, the present invention provides a method for producing a multilayer laminated yarn of two types of polymers having a multilayer for obtaining a single color, having a uniform layer thickness, and expressing an effective interference color, and a die suitable for the method. It is to provide.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the composite polymer fiber spinning die of the present invention is a spinning die for spinning a composite polymer fiber from two or more kinds of polymer compounds. And a molten polymer component composed of a series of openings opened in a row in a direction intersecting the flow direction of the flow path is discharged to the belt-like flow path. The strip-shaped channel has a discharge hole, and the thickness of the strip-shaped channel increases on the downstream side from the installation point of the continuous row of openings, and the width of the strip-shaped channel gradually decreases. A funnel-shaped part is formed, and the tip of the funnel-shaped part is a composite polymer fiber discharge hole (Claim 1).
[0010]
In still another composite polymer fiber spinning base of the present invention, the band-shaped channel becomes a comb-shaped channel on the upstream side from the installation point of the row-shaped opening crossing the band-shaped channel, and the band-shaped ( The column-shaped openings intersecting the comb-shaped flow paths are disposed between the flow paths of the comb-shaped flow paths (claim 2).
[0011]
Further, the composite polymer fiber spinning base of the present invention is characterized in that the row-shaped openings intersecting the belt-like channel are provided only at both ends or the center of the belt-like channel. (Claim 3).
[0012]
Furthermore, the composite polymer fiber spinning die of the present invention is characterized in that another flow path surrounds the periphery of the tip portion at the funnel-shaped tip portion, and thereafter the same flow channel is formed (claim). Item 4).
[0013]
The spinning method of the composite polymer fiber of the present invention is characterized by using the above spinneret and spinning with two or more kinds of polymer compounds (Claim 5).
[0014]
In the composite polymer fiber spinning die having the above-described configuration (Claim 1), the continuous openings in a row intersect with the belt-like channel through which one component of the molten polymer compound flows. Since it is opened, the other molten polymer compound component flowing out from the continuation of the opening is introduced in a layered manner into the band-like flow of the polymer compound component. Thereafter, the band-shaped channel is expanded in the thickness direction of the band (direction perpendicular to the direction in which the plurality of polymers are laminated in multiple layers), and then the width direction of the band (the direction in which the plurality of polymers are laminated in multiple layers) is reduced. Since it flows to the funnel-shaped part, the flow in which the molten polymer of two or more components is layered compresses the multi-layer multi-layer stacking direction and expands the direction perpendicular to the multi-polymer multi-layer stacking direction. Therefore, the obtained composite polymer fiber becomes a fiber (flat yarn) having a cross section in which thin films are alternately laminated as shown in FIG. 6 and exhibits a good optical function.
[0015]
The inventors of the present invention have studied in detail a method for producing a multi-layered fiber in which each layer is substantially parallel at the interface, and in particular, as a result of studying the number of layer joining and layer disturbance, In order to control the thickness, it was found that it is important to produce a multilayer by only one bonding.
If a composite polymer fiber spinning die as described above is used, the resulting fiber is formed into a multilayer by a single bonding, and therefore the thickness of each layer can be controlled with high accuracy. Furthermore, if the composite polymer fiber spinneret of the present invention is used, the above-described flat yarn can be obtained, and such a flat yarn can increase the thickness of the fiber by increasing the flatness ratio. The yarn can be easily manufactured, and the lamination direction can be reduced. Therefore, the thickness of the layer can be easily reduced to the optical distance, that is, about 0.05 to 0.2 microns. Furthermore, when the flat yarn is made into a woven fabric, the multilayer direction can be easily aligned perpendicularly to the woven fabric surface, and the light interference effect can be greatly extracted. The long / short axis ratio of the rectangular slit serving as the composite polymer fiber discharge hole is preferably 10 times or more. At this time, fibers having a sufficient flatness ratio can be taken out.
As described above, according to the composite polymer fiber spinning die of the present invention, by creating a multilayer structure of the polymer by the number of times of joining once, by performing compression and further expansion in the direction perpendicular to the multilayer direction at the same time, Fabrics that can create flat yarns with polymers with different refractive indexes laminated on the short axis side, and when used as woven or knitted fabrics, can efficiently use light interference and have high-quality deep color and gloss It can be.
[0016]
Further, in the composite polymer fiber spinning base according to claim 2, the band-shaped channel through which one molten polymer compound flows becomes a comb-shaped channel upstream from the installation point of the continuous row of openings, and the other Since the continuous openings through which the molten polymer compound flows out are installed between the channels of the comb-shaped channel, each of the molten polymer compounds becomes a clean layer without being mixed, so it is better It expresses optical functions.
[0017]
Further, in the composite polymer fiber spinning die according to claim 3, the obtained composite polymer fiber is in a thin film alternately laminated state at both ends or the center as shown in FIGS. 7 (a) and 7 (b). Since a one-component core 1102 is formed in the part, a fiber with improved strength can be obtained.
[0018]
Furthermore, in the composite polymer fiber spinning die according to claim 4, the obtained polymer fiber is surrounded by a polymer compound in a sheath shape as shown in FIG. A fiber in which the part does not peel is obtained.
[0019]
The number of openings in the row of openings that intersect with the belt-like channel is preferably 3 or more. When the number is less than 3, the number of layers to be generated is less than 3, and it is not only impossible to obtain sufficient light reflection intensity, but also the color changes depending on the angle of incidence and reflection of light on the fiber, resulting in a high-class feeling. This is not preferable because a certain color cannot be obtained. Furthermore, 15 layers or more are preferable. The number of openings is preferably 120 or less. When the number of openings exceeds 120, an increase in the amount of reflected light can no longer be expected, and the base structure becomes complicated, spinning becomes difficult, and the base becomes expensive.
[0020]
Further, the aperture diameter is preferably 0.05 mmφ or more and 5.0 mmφ or less. When the opening is less than 0.05 mmφ, it is difficult to work with high accuracy, and foreign matter is easily caught in the opening during spinning, resulting in a decrease in the discharge amount, and the thickness of the layer tends to decrease. On the other hand, if the opening has a large diameter exceeding 5.0 mmφ, the amount of polymer passing through the opening is small, so that discharge spots are likely to occur.In addition, the width of the array of openings becomes large, and the number of layers is limited. It is not preferable because it becomes difficult to create the inside.
[0021]
Further, the distance (pitch) between the centers of the openings is preferably 0.2 mm or more and 15 mm or less. When the center-to-center distance is less than 0.2 mm, a gap cannot be secured for the polymer compound that cuts between the openings, and the layer forming property is not sufficient. On the other hand, when the center-to-center distance exceeds 15 mm, there is a restriction that the opening becomes too large and the device becomes large.
[0022]
The method for producing a composite polymer fiber of the present invention (Claim 5) is a method of spinning a composite polymer fiber using the spinneret as described above, and having a desired optical function and strength. Can be easily manufactured.
The row of openings described above does not necessarily have to be opened in a straight line. For ease of workability when opening minute holes close to each other, the staggered pattern as shown in FIG. They may be arranged in a shape, or may be arranged with a slight step as shown in FIG.
[0023]
At this time, if the polymer compound flowing through the belt-like channel is the polymer 1, and the polymer compound discharged from the row of openings intersecting with the polymer compound is the polymer 2, the polymer 2 penetrates into the polymer 1. For this, the flow rate of the polymer 2 needs to be at least twice as high as that of the polymer 1, and more preferably 4 times or more. When the flow rate ratio exceeds 20, it is not preferable because the discharge amount of the polymer 2 is too large and the flow rate of the polymer 1 is too slow.
Furthermore, the viscosity ratio of polymer 1 and polymer 2 is important. A preferable range of the viscosity ratio of the polymer 2 to the polymer 1 is 0.7 or more and 5.0 or less. Furthermore, a viscosity ratio of 1.0 or more and 3.0 or less is preferable. When the viscosity ratio is below 0.7, the layer formation becomes difficult even if the flow rate ratio is lowered to a range below 2. On the other hand, when the viscosity ratio of the polymer exceeds 5.0, the viscosity of the polymer 2 is too high, so that the fluidity is not sufficient, and the layer is unbalanced, which is not preferable.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the composite polymer fiber of the present invention will be described below with reference to the drawings.
[0025]
1 is a perspective view in which a part of a composite polymer fiber spinning base of the present invention is broken, FIG. 2 is an enlarged perspective view of a funnel-shaped portion of FIG. 1, and FIG. FIG. 3 (b) is an elevational view as seen in a form in which the row-like openings 7 are cut longitudinally. It consists of four disk-shaped parts, ie, a distribution plate 1, an upper base 2, an intermediate base 3, and a lower base 4, and the distribution plate 1 is divided into two polymer compounds A and B, respectively. Flow paths 5 and 6 are provided for supplying via the above path.
[0026]
The upper base 2 is provided with a flow path for guiding the polymer compound A to the row of openings 7, and a flow path 6 'for guiding the high molecular compound B to the center of the base. The polymer compound B guided to the center of the middle cap 3 passes through the flow path 8 provided radially on the upper surface of the middle cap 3 and further reaches the funnel-shaped portion 9 provided in parallel with the flow path 8. It passes through the upper surface of the shaped part 10 as a belt-like flow.
[0027]
Thus, the polymer compound A flowing out from the row-shaped openings 7 enters the polymer compound B passing through the upper surface of the weir 10 in a strip shape, and the polymer compound A and the polymer compound B alternate in layers. (See the arrow in FIG. 2), the funnel-shaped portion 9 expands the cross-sectional shape of the flow path in the direction perpendicular to the direction in which many polymers are stacked, The direction in which a large number of polymers are laminated gradually becomes shorter, and after passing therethrough, the polymer is discharged from the discharge port 11. Further, the polymer compound discharged from the discharge port 11 is spun through a final spinning port 12 opened in the lower nozzle 4.
[0028]
In this way, the polymer compound A and the polymer compound B laminated on the weir 10 are expanded in the direction perpendicular to the direction in which many polymers are laminated in the funnel-shaped part 9, and many polymers are laminated. Since the direction in which the film is compressed is compressed, a clean layer state is maintained, and the obtained composite polymer fiber can exhibit an excellent optical function. Further, by adjusting the apertures, intervals, etc. of the row of openings 7, a composite polymer fiber having a desired layer thickness can be obtained, and light having a desired color tone can be emitted.
[0029]
In FIG. 1, a composite polymer fiber as shown in FIG. 7A is provided with a row of openings 7 only at both ends of the belt-like channel and a core portion of the polymer compound B at the center. However, if the row-like openings 7 are provided over the entire length, a fiber as shown in FIG. 6 is obtained.
[0030]
In the spinneret of FIGS. 1 to 3, the opening 110 is not provided, and the core part 1102 may simply use the portion where the polymer compound B overflows from the flow path 8, but it is shown in FIGS. 3 (a) and 3 (b). As shown, when the core material discharge hole 13 is provided and the polymer compound B is supplied from a separate flow path, the material supply to the core 1102 proceeds smoothly.
[0031]
FIG. 4 shows another embodiment of the present invention. Here, the weir 10 'has a comb shape as shown in FIG. 4, and the upper surface of the convex portion is in contact with the upper base 2. Therefore, the polymer compound B is provided only in the channel 14 between the convex portions. pass. After that, the row-like openings 7 are opened at the point where the weir-like portion 10 ′ is cut, and the row-like openings 7 are located on the extension lines of the convex portions of the weir-like portion. The polymer compound B does not mix and forms a laminated structure better.
[0032]
FIG. 5 shows another embodiment of the present invention. In FIG. 5, part of the polymer compound A that has passed through the flow path 5 opened in the distribution plate 1 passes through the flow path 15, and the flow path 17 provided concentrically around the final spinneret inlet 19 on the lower base 4. Further, the polymer compound A passes through the upper surface of the circular weir 18 and flows into the final spinneret inlet 19. At this time, since the thin film alternate laminate that flows out from the discharge port 11 simultaneously flows into the center of the final spinneret inlet 19, the periphery of the thin film alternate laminate is surrounded by the polymer compound A, as shown in FIG. A fiber having a simple structure is obtained.
[0033]
Furthermore, as another embodiment of the present invention, a spinneret row as shown in FIG. 14 which is a combination of FIGS. 1 and 5 is shown. By using such a spinneret, a fiber having a structure as shown in FIG. 15, which is a structure in which FIGS. 7 and 8 are combined, is obtained.
[0034]
[Example 1]
The composite polymer fiber was spun using the spinneret shown in FIG. The aperture 7 has a diameter of 0.15 mmφ and a pitch of 0.4 mm, and 15 openings 7 are provided at both ends of the upper part of the belt-like channel. The core outlet 13 has a diameter of 0.28 mmφ and is provided upstream of the row of openings 7 as shown in FIG. The distance between the upper surface of the weir 10 and the plate in which the opening 7 is opened is 0.15 mm. Further, linear compression was performed with the width W of the funnel-shaped portion 9 being 2.5 mm and the compression rate at the funnel-shaped portion 9 being 90. The final spinneret 12 had a size of 0.14 mm × 2.1 mm, and the direction (stacking direction) perpendicular to each thin film was 0.14 mm.
[0035]
Nylon 6 ([η] = 1.3) was used as the polymer compound B to be supplied to the flow path 6, and the supply amount was 4 g / min. Polyethylene terephthalate ([η] = 0.48) copolymerized with 1.5 mol% of sodium sulfoisophthalic acid component was used as the polymer compound A to be supplied to the flow path 5, and the supply amount was 12 g / min. Winding was performed at a die temperature of 280 ° C. and a spinning speed of 1200 m / min. The flatness of the fiber at this time was 4. This was supplied to a roller heated to 80 ° C. and stretched at a stretching ratio of 20 times. The fineness at this time was 60 denier, the cross section thereof was as shown in FIG. 9, and the core part was about 30% of the thickness in the thin direction. The resulting fibers showed red to green color development and had sufficient strength with no problem even on knitting machines and looms.
[0036]
[Example 2]
The composite polymer fiber was spun using the spinneret shown in FIG. The diameter of the opening 7 was 0.15 mmφ, and the pitch was 0.4 mm, and 35 holes were opened in one row. Polymethyl methacrylate (MFR = 14 at 230 ° C.) is supplied at a supply rate of 4 g / min as polymer compound B, and polycarbonate (viscosity at 280 ° C. = 900 poise) is supplied at a supply rate of 12 g / min as polymer compound A. The yarn was fed and spun at a base temperature of 280 ° C. at 2000 m / min. The fineness at this time was 72 deniers, and had a cross-sectional structure as shown in FIG. 10, and a clear green color was recognized.
[0037]
[Comparative example]
As the spinneret used in the first embodiment, the core discharge port 13 is not used, and 35 openings 7 are continuously opened in a straight line. Otherwise, the cross-sectional structure as shown in FIG. The composite polymer fiber was obtained.
[0038]
The results of measuring the tensile strength of the fiber thus obtained and the fiber obtained in Example 1 are shown in FIG. a is the fiber obtained in the comparative example, and b is the fiber obtained in Example 1. Thus, the thin-film alternating laminated fiber of Example 1 having a core part was much higher in strength than that having no core part.
[0039]
[Example 3]
Spinning with three kinds of polymers was performed using the spinneret shown in FIG. In this example, another upper distribution plate is prepared on the distribution plate, and a flow path for supplying the third polymer C is provided and led to the opening 14.
The aperture 7 had a diameter of 0.15 mmφ and a pitch of 0.4 mm, and 15 openings 7 were provided at both upper ends of the belt-shaped channel. The core outlets 13 have a diameter of 0.38 mmφ, and four are provided as shown in FIG. The distance between the upper surface of the weir 10 and the plate in which the opening 7 was opened was 0.15 mm. Further, the compression was performed linearly with the compression ratio at the funnel-shaped portion 9 being 90. The dimensions of the spinneret 12 were 0.125 mm × 2.5 mm and the straight length was 0.4 mm.
The polymer compound B supplied to the flow path 6 through the upper distribution plate 20 and a flow path (not shown) provided in the distribution plate is polyethylene naphthalate, and the polymer supplied to the flow path 5 at a supply rate of 5 g / min. Compound A as nylon was supplied at a supply rate of 15 g / min, and polymer compound C supplied to the opening 13 was supplied as a mixture of oxides dispersed in polyethylene terephthalate at a supply rate of 10 g / min. The die temperature was 278 ° C., the winding speed was 1500 m / min, and the draw ratio was 2.1 times.
The obtained fiber has a structure as shown in FIG. 15 and has a core portion made of a mixture of polyethylene terephthalate and oxide at the center and a sheath-like portion made of nylon around, and a thin film of nylon and polyethylene naphthalate therebetween. A fiber having an interlaminate was obtained. A bright red color was observed on this fiber.
[0040]
【The invention's effect】
As described above, the composite polymer fiber of the present invention has a thin film alternating laminated portion composed of two or more different polymer components and a core portion serving as a reinforcing portion at the same time. Practical strength that can be applied to knitting and looms.
[0041]
Further, according to the spinneret and the spinning method of the present invention, the above fibers can be easily obtained with high accuracy.
[Brief description of the drawings]
FIG. 1 is a partially cut perspective view showing an example of a composite polymer fiber spinneret of the present invention.
FIG. 2 is an enlarged perspective view of a main part of FIG.
3A is a plan view cut along a plane crossing the row-like openings 7 in FIG. 2; FIG.
(B) It is the elevation which cut | disconnected the row-like opening part 7 of FIG.
FIG. 4 is a perspective view in which a main part of another example of the composite polymer fiber spinneret of the present invention is enlarged and partially broken.
FIG. 5 is a partially broken perspective view of another example of the composite polymer fiber spinneret of the present invention.
6A and 6B are a cross-sectional view and a perspective view of a composite polymer fiber having a cross section in which thin films are alternately stacked.
FIGS. 7A and 7B are perspective views of a composite polymer fiber having both thin-film alternating laminated portions and a core portion, where FIG. 7A shows an example in which the core portion is formed at the center and FIG.
FIG. 8 is a perspective view of a composite polymer fiber having a sheath portion around the fiber.
9 is a cross-sectional view of the fiber obtained in Example 1. FIG.
10 is a cross-sectional view of the fiber obtained in Example 2. FIG.
FIG. 11 is a cross-sectional view of fibers obtained in a comparative example.
12 shows the tensile strength measurement results of the fiber obtained in Example 1 and the fiber obtained in Comparative Example. FIG.
FIG. 13 shows another example of an opening opened in a nozzle plate.
FIG. 14 is a partially broken perspective view of an example of the composite polymer fiber spinneret of the present invention.
FIG. 15 is a perspective view of a composite polymer fiber having a core part at the center of the fiber and a sheath part around the fiber part.
FIG. 16 is a partially broken perspective view of a composite polymer fiber spinneret used in Examples.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Distribution plate 2 Upper nozzle | cap | die 3 Middle nozzle | cap | die 4 Lower nozzle | cap | die 7 Row-shaped opening 9 Funnel-shaped part 10 Weir-shaped part 12 Final spinning port 17 Flow path 18 Circular weir-shaped part 19 Final spinning port inlet 20 Upper distribution plate

Claims (5)

In a spinneret for spinning composite polymer fibers from two or more kinds of polymer compounds, a band-shaped channel through which one component of the molten polymer compound passes, and the flow direction of the channel in the middle of the channel Having a plurality of openings that are opened in a row in a direction intersecting with each other, and having discharge holes for discharging other molten polymer compound components to the strip-shaped channel, the strip-shaped channel having a plurality of rows of openings The thickness of the band-shaped channel (the direction perpendicular to the direction in which the plurality of polymers are laminated in multiple layers) is expanded on the downstream side from the installation point of the section, and the width of the band-shaped channel (the plurality of polymers are laminated in the multilayer) A funnel-shaped part is formed such that the direction in which it is gradually reduced, and the flow path cross section at the tip of the funnel-shaped part has a multi-layer stacking direction of a plurality of polymers as a short axis, and a direction perpendicular thereto is long. It becomes a rectangular slit with a shaft and a composite polymer fiber discharge hole Composite polymer fiber spinning die, characterized by that. The band-shaped channel becomes a comb-shaped channel upstream from the installation point of the column-shaped opening that intersects the band-shaped channel, and the column-shaped opening that intersects the band-shaped (comb-shaped) channel 2. The composite polymer fiber spinning die according to claim 1, wherein the die is disposed between the channels of the comb-shaped channel. 2. The composite polymer fiber spinning die according to claim 1, wherein the row-shaped openings intersecting the band-shaped channel are provided only at both ends or the center of the band-shaped channel. 4. The composite polymer fiber spinning base according to claim 1, wherein another end of the funnel-shaped front end surrounds the end of the funnel-shaped front end, and then the same flow path is formed. . A spinning method for a composite polymer fiber, wherein the composite polymer fiber spinning die according to any one of claims 1 to 3 is used to spin with two or more kinds of polymer compounds.

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