JP3358651B2 - Composite polymer fiber spinneret - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinneret for producing a fiber exhibiting a novel optical function, and to a light reflection,
When spinning sea-island fibers having an optical function of developing color by interference, diffraction, scattering, etc., especially, spinning for production of optically-functional cross-section fibers for forming islands constituting the sea-island fibers by bonding with a sea member Regarding the base.

[0002]

2. Description of the Related Art In recent years, in response to the demand for high-quality texture of fabrics, sensible fibers such as swelling have been developed by changing from a simple round cross-section yarn to an irregular cross-section, and by combining two or more fibers, and blooming as a new synthetic fiber. did. Recently, there has been a demand for fibers having higher sensitivity and function. One of them is deep color and gloss. However, if you try to satisfy the deep color and the gloss at the same time, you can get a deep color, but the color will be dull and lose vividness. In the past, there was no compatible technology. The cause is, in the prior art,
Color is developed by dyes and pigments, and it is developed by absorbing light.
The reflected light was reduced and the gloss was lost. By the way, when overlooking the natural world, for example, beetles and morpho butterflies satisfy deep color and luster at the same time, and have a color that satisfies both deep color and luster at the same time as dyes and pigments. As this coloring mechanism, light reflection and interference are used, and various studies have been made on whether this mechanism can be used for synthetic fibers.

[0003] For example, Japanese Patent Publication No. 43-14185 discloses a coated conjugate fiber having three layers of pearl luster. However, when the number of layers is at most three, coloration is surely observed due to reflection and interference, but the extent is limited, and it is insufficient for a demand for high sensitivity.

[0004] The multi-layered fibers whose interfaces are all substantially parallel can be obtained by alternately joining different kinds of polymers alternately in a spin pack having a static mixer as described in JP-B-60-1048, for example. It can be obtained by discharging the obtained polymer from a discharge hole. An example of a composite fiber composed of polyethylene terephthalate and nylon 6 which are stacked via a multi-layer film component using this static mixer is shown, and a woven fabric having a pearl luster is obtained. However, when trying to obtain a multilayer fiber by the method described in Japanese Patent Publication No. 60-1048, a laminar flow is gradually seen at the time of repetition of joining of two polymers, and although a moderate multilayer is obtained, the optical precision is obtained. Was insufficient to obtain a multilayer having a controlled thickness. Especially when trying to obtain a multilayer of 10 or more layers, as the number of bonding, it is necessary to repeat several times or more, due to the disorder of the interlayer thickness, although interference light is obtained, but its intensity is insufficient and In addition, interference light of various wavelengths, that is, turbidity of the color was observed, and only an insufficiently sensitive color was obtained.

Further, Japanese Patent Publication No. 57-20842 discloses a static fluid mixing apparatus, and Japanese Patent Publication No. 53-8806 and Japanese Patent Publication No. 53-8807 disclose a mixed spinning method and apparatus therefor. These are the joining of two polymers,
The separation was repeated and was not sufficient to produce optically sized multilayers due to mixing due to the complexity of the polymer stream.

Further, Japanese Patent Application Laid-Open No. Sho 62-170510 discloses a method for obtaining interference colors by providing fine irregularities on the fiber surface. This method seeks to form a diffraction grating on the fiber. A similar method is disclosed in Japanese Patent Application Laid-Open No. 4-202805. In these fibers, although the coloration due to interference is observed, the interference has a different interference wavelength depending on the viewing angle, that is, the color of the fabric changes as in the case of the thin film, and only inexpensive sensitivity is obtained.

On the other hand, Japanese Patent Application Laid-Open No. Sho 59-228042 discloses
JP-B-60-24847, JP-B-63-6453
No. 5 proposes coloring fibers and fabrics in which the color tone is changed according to the viewing angle and inspired by Morpho butterfly from South America, which is famous for having a vivid color tone effect. However,
The fibers used in these inventions are flat yarns in which different kinds of polymers are bonded, and even if they are laminated, it is difficult to obtain a thickness that interferes with light at all. Only play. On the other hand,
Japanese Patent Application Laid-Open No. 4-42421 discloses a method for obtaining multilayered fibers of different polymers. However, the present method is to arrange the multilayer portion in a hollow ring shape,
This is for obtaining an ultrafine fiber by dissolving one of the components, and does not give any suggestion to a fiber that obtains an interference effect by matching a multilayer laminate with optical dimensions.

On the other hand, a material which develops a color by forming a sandwich structure of a molecular orientation anisotropic film with a polarizing film has also been published (for example, VOL. 42, N
O.2, p.55 (1989), VOL.42, NO.10, p.
160 (1989)). Further, in JP-A-7-97766 and JP-A-7-97786, there is disclosed a light having a substantially transparent thin film layer that can be colored by reflected light of light incident on the surface of the fabric from the front side and reflected light on the back side. A fiber fabric provided with an interference film is disclosed. The interference of these thin films has different interference wavelengths depending on the viewing angle, that is, the color of the fabric changes, and only inexpensive sensitivity is obtained.

[0009]

SUMMARY OF THE INVENTION As described above, a fiber having a multilayer laminated structure having optical precision, having uniform wavelengths of reflected light, that is, obtaining a single color, and having a sufficient light interference effect. At present, no spinneret suitable for the production of the above has been disclosed. Therefore, the present invention enables a multilayer having more than 10 layers in order to obtain a single color, and has a uniform thickness of the layers and a thin film of two polymers alternately exhibiting an effective interference color. An object of the present invention is to provide a spinneret suitable for producing a composite polymer fiber having a laminated portion.

[0010]

Means for Solving the Problems In order to achieve the above object, a spinneret for spinning a composite polymer fiber of the present invention comprises a spinneret for spinning a composite polymer fiber from two or more polymer compounds. Two nozzle plates in which openings for discharging the components of the polymer compound are opened in a row face each other such that the openings are alternately arranged, and the nozzle plate is discharged from the nozzle plate on the downstream side of the nozzle plate. A collection chamber of two or more types of polymer compounds is formed, and a flow path is narrowed in a direction perpendicular to the direction in which the two nozzle plates face each other on the downstream side of the collection chamber. A spinneret for spinning a composite polymer fiber, wherein a funnel-shaped portion is formed (claim 1).

Further, in the spinneret for composite polymer fiber spinning of the present invention, the two nozzle plates face in parallel, and the polymer compound discharged from the opening formed in each nozzle plate is discharged in the facing direction. , Are arranged so as to gather (claim 2).

In another spinneret for spinning a conjugated polymer fiber according to the present invention, the two nozzle plates face each other so as to form a chevron portion by contacting the upstream side of the nozzle plate. The high molecular compound discharged from the opened opening is discharged obliquely to the downstream side and is arranged so as to gather (claim 3).

Still another spinneret for spinning a composite polymer fiber according to the present invention is characterized in that, in the two nozzle plates, one nozzle plate has an opening continuously formed in a row, and the other nozzle plate has an opening. Is characterized in that the openings are opened only at both ends or the center of the row of openings, and there is no opening at the center (claim 4).

In another spinneret for spinning a conjugated polymer fiber according to the present invention, another flow path surrounds the tip of the funnel-shaped part at the tip, and then the same flow path is formed to form the final spinning. It is characterized by being connected to the mouth (claim 5).

With the above-described structure, when spinning is performed using the spinneret for spinning a composite polymer fiber of the present invention, 2
Assuming that A and B are used as types of polymer compounds,
By discharging the molten polymer compound A from the row-shaped openings of one nozzle plate and discharging the molten polymer compound B from the row-shaped openings of the other nozzle plate, the openings of the nozzle plates alternate with each other. Thus, the molten polymer compounds A and B assemble in a layered manner in the collecting chamber. After that, the composite polymer fiber obtained by being compressed in the direction in which the thickness of each layer becomes thinner in the funnel-shaped portion and discharged from the discharge hole has a state in which each of the polymer compounds A and B is extremely thin as shown in FIG. Since the layers are alternately stacked, the optical function is well exhibited (claim 1).

At this time, the openings of each nozzle plate may have the same diameter and the same interval. However, depending on the structure of the finally obtained fiber (thickness of each layer—that is, desired optical function),
Different diameters and arbitrary intervals may be used. When the two nozzle plates face each other in parallel, the molten polymers A and B discharged from the openings come into immediate contact in a straight line, so that the layers are less likely to mix with each other, and the boundary is clear, so that the The composite polymer fiber which can express the function more strongly is obtained (claim 2).

[0017] By forming the two nozzle plates into a mountain shape in which the upstream sides thereof are in contact with each other, the processing at the time of manufacturing and assembling the nozzle plates is facilitated, and labor is saved (claim 3).

In the case where one of the two nozzle plates is provided with successive openings in a row and the other nozzle plate is provided with openings only at both ends of the row of openings, Since there is no opening at the center, the central portion of the obtained composite polymer fiber becomes a lump of one polymer compound, and has a structure having a core 1102 as shown in FIG. Also, of the two nozzle plates, one of the nozzle plates is continuously opened in a row,
If the other nozzle plate has an opening only at the center of the row of openings, there is no opening at both ends, so that both ends of the obtained composite polymer fiber are clumps of one polymer compound. Thus, a structure having core portions 1102 at both ends as shown in FIG. Since such a composite polymer fiber has a core 1102 at the center, the mechanical strength is improved.

Further, at the funnel-shaped tip portion, another flow path surrounds the periphery of the tip portion, and thereafter, the same flow path is connected to the final spinning hole. The polymer surrounds the laminated body of the two types of molten polymers in a sheath shape, and a composite polymer fiber having a structure as shown in FIG. 15 is obtained (Claim 5).

Since the composite polymer fiber having such a structure is surrounded by a single component in a sheath shape, peeling of each laminate can be prevented, and the strength of the fiber is improved. The row-shaped openings described above do not necessarily have to be formed in a straight line as shown in FIG. 1B, and are formed in order to facilitate workability when minute holes are formed in close proximity. , FIG.
As shown in FIG. 8 (a), they may be arranged in a slightly staggered manner, or may be arranged with some steps as shown in FIG. 18 (b).

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a state in which two nozzle plates 1, 1 'are combined. FIG. 1A is a plan view of two nozzle plates 1 and 1 'combined, FIG. 1B is a front view thereof, FIG. 1C is a sectional view taken along line XX' of FIG. 1B, FIG.
FIG. 2D is a sectional view taken along the line YY ′ of FIG. FIG. 2
2 shows a partially cutaway perspective view in a state where the two nozzle plates 1, 1 'are slightly separated from each other. Molten polymers A and B are introduced into inlet paths 3, 3 'opened above nozzle plates 1, 1'.
From the nozzle plates 1, 31 ', and is discharged from the openings 2, 2' formed in a row in the nozzle plates 1, 1 'and transferred to the collecting chamber 19. At this time, since the openings 2 and the openings 2 'are arranged alternately, the two molten polymers after ejection are in a form in which the molten polymer A and the molten polymer B are laminated as shown in FIG. It exists in the collecting room 19.

Thereafter, the flow path following the two nozzle plates 1 and 1 ′ becomes a funnel-shaped part 4 as shown in FIG. 4 and the composite polymer that has exited through the funnel-shaped part 4 and the final discharge hole 5. As shown in FIG. 3 (b), the fibers have a high optical function because the polymers A and B are alternately laminated in a thin layer.

At this time, when the rows of openings 2, 2 'to be opened in the nozzle plates 1, 1' are opened as openings 2, 2 'and 21 as shown in FIGS. A composite polymer fiber having the core 1102 as shown in FIG. 14A is obtained. At this time, the openings 2 formed in the nozzle plate 1 may have the same diameter and the same interval.
In order to smoothly supply the polymer A to the liquid crystal 02, it is more preferable to increase the diameter of the opening 21 in the center or to make the interval closer. Although the openings 2 and 21 are formed on the same straight line in the example of FIG. 4, the openings 2 and 21 may be formed stepwise as shown in FIG. 18B for ease of processing as described above. It is.

FIG. 6 shows an actual spinneret 100 incorporating such a nozzle plate 1, 1 '. Spinneret 1
Reference numeral 00 denotes a disk-shaped upper distribution plate 9, a lower distribution plate 10, an upper ferrule 6, a middle ferrule 7, and a lower ferrule 8, which are fastened by bolts 12, respectively. As shown in FIG. 7, a large number of nozzle plates 1, 1 'are set radially on the upper base 6, and in order to supply the molten polymers A and B to each of the nozzle plate 1, 1' pairs. The upper distribution plate 9 and the lower distribution plate 10 have the same number of channels 3, 3 'as the nozzle plate 1, 1' pair, and the composite polymer fibers generated by each nozzle plate 1, 1 '. In order to obtain the shape shown in FIG. 3 (b), the nozzle plate 1,
The same number of funnel-shaped portions 4 and final spinneret 11 as 1 'pairs
Is provided.

The molten polymer A is distributed to each nozzle plate 1 by the flow path 3 provided in the upper distribution plate 9 and the lower distribution plate 10, and similarly, the molten polymer B is also distributed to each nozzle plate 1 'by the flow path 3'. Distributed by Then nozzle plate 1,
The molten polymers A and B discharged from 1 ′ are laminated, and the thickness of each layer is further reduced by the funnel-shaped portion 4, and is spun from the final spinning port 11.

Next, another embodiment of the present invention will be described with reference to FIGS. 8, 9 and 10. FIG. FIG. 8 is a vertical sectional view showing another embodiment of the spinneret according to the present invention, and FIG.
9B is a plan view of the pair of nozzle plates 1 and 1 ″, FIG. 9B is a cross-sectional view of FIG. 9A taken along line WW ′, and FIG.
FIG. 10 is an enlarged perspective view showing the upper surface of the lower die 8 '. The nozzle plate 1, 1 "pair in the present embodiment is set in the base as a number of radials as illustrated in Fig. 7. One nozzle plate 1" has an opening 2 "and a molten polymer B. A supply port 13 for supplying the molten polymer B is provided at a position corresponding to the supply port 13 for supplying the molten polymer B.

Further, a ring-shaped groove 16 as shown in FIG. 10 is formed on the upper surface of the lower base 8 ′, and the middle base 7 ′.
A weir-shaped projection 17 is provided at a position corresponding to the discharge hole 5. The molten polymer B that has passed through the flow path 15 fills the ring-shaped groove 16 and further flows into the flow path 18 beyond the upper surface of the weir-shaped projection 17.

At this time, since the laminate of the molten polymers A and B flows into the center of the flow channel 18 from the discharge hole 5, the weir-shaped projection 1
The molten polymer B that has passed over the laminate 7 has a shape surrounding the laminate in a sheath shape. The composite polymer fiber finally spun from the spinning hole 11 has the molten polymer A and the molten polymer A as shown in FIG. A structure in which molecules B are alternately stacked is surrounded by a sheath-shaped frame C.

In another embodiment, the shape of the nozzle plate used can be replaced with a shape in which the openings 2 are obliquely opposed as shown in FIG. 11 instead of FIG. 1C. In the example, the nozzle plates face each other so as to contact the upstream side to form a chevron. The nozzle plate having the chevron portion is easy to manufacture and assemble, and can save labor. Further, the installation direction of the nozzle plate is not limited to the vertical one, and a two-plate combination of two nozzle plates 102 and 102 'as shown in FIG. The molecules B are respectively supplied from below, and are discharged from the openings provided alternately at the interface between the nozzle plates 102 and 102 'as described above.

As another embodiment of the present invention, a composite fiber spun from three types of polymer compounds will be described with reference to FIG. In this spinneret, the two nozzle plates 1, 1 'are vertically combined, and in this example, the upper die 6 and the lower distribution plate 10 are the nozzle plates 1 and 1', respectively. FIG. 20 is a cross-sectional view of FIG. 19 taken along line X-X, and a row of openings 2 and a row of openings 21 are provided with steps. FIG. 21 is a cross-sectional view taken along the line YY ′, and FIG. 22 is a cross-sectional view taken along the line ZZ ′ of FIG. Here, the molten polymers A and B are guided to the nozzle plates 1 and 1 'through conduits 3 and 3', respectively, and are discharged from the openings 2 and 2 ', while the molten polymer C is opened through the conduit 3'. The fibers discharged from 21 and passed through the funnel-shaped portion 4 after the three have gathered are as shown in FIG. 14 (a). Thereafter, a part of the molten polymer is guided to the ring-shaped groove 16 and flows into the flow channel 18 beyond the upper surface of the weir-shaped projection 17. Surrounding, a fiber as shown in FIG. 23 is obtained.

[0032]

Example 1 Spinning was performed using two types of polymer compounds using the spinneret shown in FIGS. The diameter of opening 2 is 0.
203 mmφ, aperture 2 'is 0.2mmφ, pitch is
0.5mm, aperture 21 diameter is 0.35mmφ, pitch is 0.75m
m, 16 + 16 openings 2 and 2 'were provided, four openings 21 were provided, and 11 pairs of nozzle plates 1 and 1' were installed in the base as 11 pairs of radials as shown in FIG. The interval between the nozzle plates 1 and 1 'is set to 0.2 mm, and the downstream side is provided with a flow path 19 (see FIG. 1c) tapered so that the interval extends from 0.2 mm to 2.5 mm. A taper 4 having a narrower flow path in the direction perpendicular to the facing directions of 1 and 1 'was provided, and the dimension of the final spinning port 11 was 0.13 mm x 2.5 mm.

Nylon 6 ([η] = 13) was used as a polymer compound to be supplied to the nozzle plate 1, and the supply amount was 12 g / min. As the other polymer compound, polyethylene terephthalate ([η] = 0.48) obtained by copolymerizing 1.5% by mole of a sodium sulfoisophthalic acid component was used, and the supply amount was 8 g / min. Spinning speed at 280 ° C
It was wound up at 1500 m / min. At this time, the flatness was 5.5, and this was supplied to a roller heated to 80 ° C., and stretched at a stretch ratio of 2.0 times. The obtained composite polymer fiber had a flat cross-sectional structure having a core D at the center of the laminated structure of the molten polymers A and B, as shown in FIG. 16, and red to green coloring was observed.

[0034]

Embodiment 2 Using the spinneret shown in FIGS.
Spinning was performed with various types of polymer compounds. The diameters of the openings 2 and 2 ″ were 0.2 mmφ, 31 openings 2 were provided, and 30 openings 2 ″ were provided in a row. Opening 2 as a polymer compound
To the same polyethylene terephthalate as in Example 1,
Nylon 6 was supplied to each opening 2 ', and the other parts were treated in the same manner as in Example 1. The composite polymer fiber obtained as a result had a flat cross-sectional structure having a sheath C around the laminated structure of the molten polymers A and B as shown in FIG. 17, and green to blue colors were observed. The nozzle plate 1 as shown in FIG.
By combining 1 'with the spinning device shown in FIG. 8, a fiber having a structure having both the core D and the sheath C can be obtained.

[0035]

Example 3 Spinning was performed from three types of polymer compounds using the spinneret shown in FIGS. The nozzle plate was 12 pairs and arranged radially to form an apparatus as shown in FIG. The opening 2 has a diameter of 0.15 mmφ, 16 × 2 holes per nozzle plate, and supplies polyethylene naphthalate. The opening 2 ′ has a diameter of 0.15 mmφ, 15 × 2 holes per nozzle plate, and supplies nylon. The opening 21 has a diameter of 0.4 mm and 4 openings, and a mixture of polyethylene terephthalate and oxide is supplied to each opening. The feed rate is 30 g / min and the die temperature 2
The film was wound at 75 ° C. at a spinning speed of 1500 mm / min. At this time, the drawing ratio was 2.0 times and the cross section of the completed fiber was 15 μm.
The fiber having the structure shown in FIG. 23 was obtained at a size of × 75 μm and an aspect ratio of 5. The resulting fiber exhibited green to blue color development, and in particular, since the oxide was mixed in the polymer serving as the core, the color was brighter than when the core was transparent.

[0036]

According to the spinneret of the present invention, it is possible to easily and accurately prepare a composite polymer fiber having a cross-sectional structure in which thin films of two or more polymer compounds are substantially alternately laminated, and the obtained composite is obtained. Polymer fibers exhibit an optical function of coloring by reflection and interference, and can be used for various purposes.

[Brief description of the drawings]

FIG. 1 is a diagram in which two examples of a nozzle plate used in the present invention are combined. 1A is a plan view, FIG. 1B is a front view, FIG. 1C is a sectional view taken along line XX ′ of FIG. 1B, and FIG. 1D is a sectional view taken along line YY ′ of FIG.

FIG. 2 is a perspective view in which two nozzle plates shown in FIG. 1 are placed in a slightly separated state, and a part thereof is cut away.

FIG. 3 is a view showing 2 nozzles discharged from two nozzle plates of FIG. 1;
It is sectional drawing which shows the state of a kind of molten polymer. (A) shows the state immediately after discharge, and (b) shows the state after passing through the upper part of the funnel.

FIG. 4 is a cross-sectional view of the two nozzle plates shown in FIG. 1 and a funnel following the nozzle plate, cut along a plane including a joining surface of the two nozzle plates.

FIG. 5 is a cross-sectional view of another embodiment of the present invention, in which two nozzle plates are cut along a plane that vertically crosses all openings formed in rows.

FIG. 6 is a vertical sectional view of the spinneret of the present invention.

FIG. 7 is a cross-sectional view of the spinneret of the present invention cut along a plane crossing the upper part of the upper die.

FIG. 8 is a vertical sectional view of a spinneret according to another embodiment of the present invention.

FIG. 9 is a view of two nozzle plates according to another embodiment of the present invention. (A) is a plan view of the nozzle plate,
(B) is a cross-sectional view of (a) cut along WW ', and (c) is a cross-sectional view cut of ZZ'.

FIG. 10 shows a middle ferrule 8 'according to another embodiment of the present invention.
FIG.

FIG. 11 is a sectional view of another example of a nozzle plate used in the present invention.

FIG. 12 is a sectional view showing another example of the spinneret of the present invention.

FIG. 13 shows an example of a composite polymer fiber obtained by the spinneret of the present invention. (A) is a longitudinal sectional view, (b) is a perspective view.

FIG. 14 shows another example of a composite polymer fiber obtained by the spinneret of the present invention. (A) shows an example having a core at the center, and (b) shows an example having a core at both ends.

FIG. 15 shows another example of the composite polymer fiber obtained by the spinneret of the present invention.

FIG. 16 is a cross-sectional view of the composite polymer fiber obtained in Example 1.

FIG. 17 is a cross-sectional view of the composite polymer fiber obtained in Example 2.

FIG. 18 shows another example of the opening formed in the nozzle plate.

FIG. 19 is a vertical sectional view of a spinneret according to another embodiment of the present invention.

FIG. 20 is a sectional view taken along line XX ′ of FIG. 19;

FIG. 21 is a sectional view taken along the line YY ′ of FIG. 19;

FIG. 22 is a sectional view taken along the line ZZ ′ of FIG. 21;

FIG. 23 shows another example of the composite polymer fiber obtained by the spinneret of the present invention.

[Explanation of symbols]

 1, 1 ', 1 "nozzle plate 2, 2', 2" Opening in nozzle plate 4 Funnel-shaped part 6, 6 'Upper ferrule 7, 7' Middle ferrule 8, 8 'Lower ferrule 9, 9' Upper distribution plate 10, 10 'Lower distribution plate 11, 11' Final spinneret A, B Molten polymer C Sheath frame D Core

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kanaya Kumazawa 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Prefecture Inside Nissan Motor Co., Ltd. (72) Inventor Hiroshi Tabata 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. Inside the company (72) Inventor Shinji Owaki 3-4-1, Amihara, Ibaraki-shi, Osaka Teijin Limited Osaka Research Center Co., Ltd. (72) Toshimasa Kuroda 3-4-1, Amihara, Ibaraki-shi, Osaka Teijin Limited Osaka Inside the Research Center (72) Inventor Susumu Shimizu 2-73, Shinmachi, Hiratsuka-shi, Kanagawa Prefecture Inside the Technology Development Center, Tanaka Kikino Kogyo Co., Ltd. (72) Inventor Akio Sakihara 26-26 Suzukawa, Isehara-shi, Kanagawa Kokino Tanaka Kogyo (56) References JP-A-11-1919 (JP, A) JP-A-9-95817 (JP, A) JP-A-8 -226012 (JP, A) JP-B-47-15531 (JP, B1) JP-B-44-26983 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) D01D 4/00- 4/08 D01D 5/32 D01F 8/00-8/18

Claims (5)

(57) [Claims] 1. A spinneret for spinning a composite polymer fiber from two or more kinds of polymer compounds, comprising two nozzle plates each having an opening for discharging a component of the polymer compound in a row. A collection chamber of two or more types of polymer compounds discharged from the nozzle plate is formed on the downstream side of the nozzle plate so that the openings thereof are alternately arranged, and on the downstream side of the collection chamber, A spinneret for spinning a composite polymer fiber, wherein a flow path is narrowed in a direction perpendicular to a direction in which two nozzle plates are opposed to each other, and a funnel-shaped portion having a fiber discharge hole is formed at a tip thereof. 2. The method according to claim 1, wherein the two nozzle plates face each other in parallel, and the polymer compounds discharged from the openings formed in the respective nozzle plates are discharged so as to face each other and are arranged so as to gather. The spinneret for spinning a composite polymer fiber according to claim 1, wherein 3. The two nozzle plates are opposed to each other so as to form a chevron portion by contacting the upstream side of the nozzle plate, and the polymer compound discharged from the opening formed in each nozzle plate is located on the downstream side. The spinneret for composite polymer fiber spinning according to claim 1, wherein the spinneret is arranged so as to be discharged obliquely and assembled. 4. In the two nozzle plates, one of the nozzle plates has a continuous opening in a row, and the other nozzle plate has a row of the openings.
4. An opening is opened only at both ends or the center, and there is no opening at the center or both ends.
The spinneret for spinning a composite polymer fiber according to any one of the above. 5. The funnel-shaped tip portion, wherein a separate flow path surrounds the periphery of the tip portion, and thereafter the same flow path is connected to a final spinning port. 5. The spinneret for spinning a composite polymer fiber according to any one of claims 1 to 4.