JPS622045B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for spinning multicomponent fibers. In particular, the present invention relates to a spinning device that is excellent for spinning polymeric interlayer array fibers, which are a type of multicomponent fibers.

A known method for spinning multi-component fibers is commonly referred to as polymer blend kneading spinning or mixed spinning, in which peas or chips of two or more types of polymers are mixed, melted and kneaded, and then discharged. There is. According to this method, ultrafine fibers of 0.01 d or less can be obtained relatively easily. However, this method has problems with spinning stability due to factors such as polymer viscosity, viscosity ratio, polymer interfacial properties, mixing ratio, degree of mixing, spinning temperature, viscosity change due to degree of drying, shape of mixing kneading machine, shape of discharge nozzle, etc. It is a method that is extremely problematic for industrial production as it is greatly influenced by On the other hand, as a method superior in terms of spinning stability,
An example is a composite spinning method as described in Japanese Patent No. 18369. However, this method also has drawbacks in terms of creating a large number of islands, especially multiple discharge holes, and miniaturizing the die in order to obtain ultrafine fibers. It is true that according to this method, by increasing the number of pipes, it was possible to spin fibers having 5 islands, 100 islands, or even 1000 islands. However, as the number of islands increases, it becomes difficult to downsize the nozzle and increase the number of discharge holes. This is because the pressure drop that accompanies the flow of the polymer between the cap plates (the fluid pressure of the polymer decreases as it leaves the introduction section) must be taken into account. For example, as can be seen in the example of a method using pipes to flow one component into the space between the base plates where the pipes stand, the more pipes there are, the more they become an obstacle to the flow of the polymer, resulting in a drop in pressure. becomes larger. Furthermore, since the pipe occupies that much space, it becomes difficult to miniaturize the cap, which makes the pressure distribution of the polymer even more uneven. In this method, it is necessary to reduce the number of pipes as much as possible to ensure spinning stability.
There is a multi-island type multi-component fiber spinning apparatus as described in Japanese Patent No. 54-125718. however,
Even with this method, there is a limit to the number of islands that can be formed to obtain ultrafine fibers. The fiber produced by this method has a structure in which one component is divided into a plurality of islands by another component, and the number of divisions is as follows:
10 or more is extremely difficult due to the mechanism of the spinning device. 1
This is because even if you try to divide a polymer flow of one component into 10 or more components and flow them in combination with other components, mechanically the divided flows will end up merging together.

In this way, even if the spinning stability is good and the number of pipes is reduced, the number of islands is 100 or more, 1000 or more.
If we can create an extremely large number of fibers that can reach up to 10,000 fibers, it can be called a revolutionary ultra-fine fiber spinning method.

An object of the present invention is to provide a spinning device that is effective as a means for obtaining ultrafine fibers and has good spinning stability. Another object of the present invention is to provide a spinning apparatus capable of producing a sea-island type composite multicomponent fiber having an extremely large number of islands in which one component is dispersed in a striped manner with good spinning stability. Still another object of the present invention is to provide a fiber spinning device in which a core component having a sea-island structure is surrounded by other sheath components. Other objects of the present invention are that not only can the number of islands be extremely large, but also that it is possible to have multiple discharge holes per unit area of the spinning pack or nozzle holder, and that the nozzle can be disassembled in fixed units, allowing repeated industrial use. The purpose of the present invention is to provide a spinning device.

In order to achieve this object, the present invention takes the configuration as described in the claims.

The fiber obtained by the spinning device of the present invention is
It is processed into threads, strings, and sheets, and some components are dissolved and removed as necessary to create fabrics,
It is preferably used for towels, various microfilters, polishing cloths, wiping cloths, wicks for stoves and lamps, artificial blood vessels, artificial skin, gauze, base fabrics for artificial fur, etc. Densely woven textiles allow water vapor and air to pass through, but water and water droplets do not easily pass through them, so they are preferably used for applications that take advantage of these functions. In particular, the fibers obtained by the apparatus of the present invention have a structure very similar to collagen fibers, and are therefore extremely useful as fibers for various artificial leathers. The present invention includes silver-finished artificial leather with a silver surface that feels like a high-quality calf that sticks to the hand, high-quality nubuck-like artificial leather with dense short piles, and suede-like artificial leather with a soft feel and elegant appearance. It can be obtained by using fibers obtained by a spinning device. In addition, when the fibers obtained by the spinning device of the present invention are bombarded with a high-speed fluid stream such as a water jet, fibrillation is easily and extremely finely formed. Preferably applied to forming. In addition, many useful products with new properties can be made, and the uses of fibers can be further expanded.

The present invention will be specifically explained below based on the drawings.

Each drawing shows a preferred embodiment of the present invention, and the present invention is not limited to such embodiment.

FIG. 1 is a cross-sectional example of a fiber to be spun by the spinning apparatus of the present invention. A, b, c, and d are all cross-sectional views of fibers obtained by the two-fluid system, and are usually composed of two components. However, 2
The components (1 and 2 in the figure) do not necessarily mean that they are composed of two types of polymers. It is also possible to consider a mixture of two or more polymers as one component. That is, it is possible that the polymer is composed of three or more components. e, f, g, and h are the cross sections of the fiber obtained by the three-fluid method, and are usually 3
It consists of ingredients. However, as in the case of two components, three components (1, 2, and 3 in the figure) do not necessarily mean that the polymer is composed of three types of polymers. It is also possible that the polymer consists of two or three or more components. Here, a, b, c,
The following description will be made assuming that d consists of two components, and e, f, g, and h consist of three components.

In the multicomponent fiber shown in Figure 1, a,
b, c, d are composed of island 1 and sea 2,
e, f, g, and h are composed of a core consisting of an island 1 and a sea 2, and a sheath consisting of a sea 3. This island is 1
The structure is such that one component stream 1 is divided into a very large number (more than 100 or more than 1000 or even 10000) and merges with other component streams 2.

Regarding the shape of such islands, the thinner the island, the more circular it becomes, but it may also be scaly, crescent-shaped, spindle-shaped, polygonal, or shaped like Celebes Island in the Republic of Indonesia. There is no change in the gist of the present invention. Furthermore, FIG. 1b shows a sea-island structure within the island. That is, it has a structure in which two ocean components exist as islands within one island component.

The cross-sectional shape of the multicomponent fiber can be circular, polygonal, rod-shaped, starfish-shaped, etc. depending on the purpose by changing the shape of the discharge holes.

The spinning principle of the present invention will be explained based on the spinning apparatus shown in FIG. FIG. 2 is a longitudinal sectional view of the spinning device. To make it easier to understand, the spinning equipment is referred to as W, Y,
We will divide Z into three elements and explain each one.

First, W will be explained. The flow of polymer A, which is a component of the island, is guided through the hole 4 and distributed into a plurality of flows. Furthermore, this distributed flow flows down in the pipe 7 via the hole 5 and reaches the funnel-shaped part 10. On the way to the funnel-shaped part 10, the distributed stream is coated by the polymer B introduced from the space 8 into the annular part formed between the pipe 7 and the hole 9. Here, the annular portion restricts the flow of the polymer B, making it possible to form a uniform covering flow between each hole.

In FIG. 2, 4, 5, and 7 form a supply path for one island component (polymer A), and 9 forms a supply path for another component (polymer B).

The composite flow reaches a funnel-shaped convergence section, where it is converged into one flow and introduced into the dividing element 11. Note that the convergence part does not necessarily have to be funnel-shaped, and it is sufficient that it has the function of converging a composite flow into one flow.

The main function of the holes 4 provided in the hard plate is to distribute the flow of the polymer A, but this is not necessarily necessary since the pipe 7 itself also has a distribution function. However, since the polymer A can be distributed more uniformly by providing a restriction in a part of the hole 4 (most preferably at the bottom), it is often preferable to have a hot hole. The hole 5 provided in the hard plate serves to connect the hole 4 and the pipe 7, and does not necessarily need to be provided. However, in the case where the pipe 7 is set by being fitted into a hard plate, it is often preferable to have an effect of preventing the pipe 7 from slipping upward. For the pipe 7 provided on the hard plate, it is preferable to use a pipe with steps 6 as shown in the figure to prevent the pipe from slipping downward. The method for setting the pipe 7 includes a fitting method as shown in the figure, screwing, fusing, adhesion, welding, and other methods, and is not particularly limited. Of course, it may also be formed integrally with the hard board.

A space 8 is partitioned between the hard plate in which the pipe 7 is fitted and the hard plate in which the hole 9 is bored. Space 8 becomes a passage for the polymer (polymer B) which becomes the sea component. The route for introducing the polymer B into the space 8 is not particularly limited, and is therefore omitted in FIG. A pipe 7 is inserted into the hole 9, and the pipe 7 is inserted into the hole 9.
An annular portion is formed between the pipe 7 and the pipe 7. This annular portion regulates the fluid flow of the polymer B, and effectively envelops the polymer passing through the pipe 7.

Next, Y will be explained. While the composite flow of polymer A and polymer B that has been converged into one flow passes through the dividing element 11, it undergoes the following steps: "dividing → position movement →
The "superposition" is repeated to form a polymer flow consisting of a large number of subdivided phases in a direction parallel to the flow direction. Here, the dividing element 11 is
Stationary splitting elements, which do not require any known drive parts, can optionally be employed. Namely, the ``Statistic Mixer'' by Kenics Corporation of America, the ``Scare Mixer'' by Sakura Seisakusho, and the ``Honeycomb Mixer'' by Tatsumi Kogyo.
Mixer", Tokushu Kika Kogyo Co., Ltd.'s "TK-ROSSISG mixer", Toray Engineering Co., Ltd.'s "High Mixer", and the multi-layer laminate described in Japanese Patent Application Laid-open No. 154127/1983. It goes without saying that the present invention is not limited to this, and that different types of stationary splitting elements may be used in combination. By such a stationary splitting element, polymer A
Since the flow of polymer B and B is divided in a direction parallel to the flow direction, two-dimensional fine dispersion is inevitably achieved, and it takes the form of a substantially infinite stripe in the length direction. Become.

In FIG. 2, the divided and finely divided flow is immediately guided to the funnel-shaped convergence part 12, but the divided and finely divided flow is further guided into a wire mesh, a sand grain layer, a sintered metal porous layer, or a honeycomb structure. It may be guided to the funnel-shaped convergence section 12 after passing through a porous layer or the like.

Although there is no particular limitation on the number of dividing elements, if it is less than 2, the number of divided streams will be small, resulting in a decrease in the number of islands in the multicomponent fiber, making it difficult to obtain ultrafine fibers. FIG. 2 shows a stack of eight dividing elements. In addition, these divided elements may form one flow path as a whole, or may be configured to have two or more flow paths in parallel, and it is not necessary that the number of elements in all flow paths is the same. .

Next, Z will be explained. The polymer stream divided and finely divided by the dividing element 11 reaches the converging section 12 where it is converged, and is discharged from the discharge hole 13 as a single fiber. As mentioned above, the cross-sectional shape of the discharge hole 13 is not only circular, but also Y,
Any shape can be adopted depending on the purpose, such as T, L, -, +, *, donut shape, etc.

Furthermore, the spinning principle of the present invention will be explained based on the spinning apparatus shown in FIG. As in Figure 2, for ease of understanding, the spinning device is
We will divide it into two elements and explain each one.

However, W in Figure 2 and W' in Figure 3, Y in Figure 2 and Y' in Figure 3 have the same structure, and W
Since all the matters explained regarding W' and Y' also apply to W' and Y', a re-explanation of W' and Y' will be omitted here. Therefore,
Only Z' will be explained. The polymer flow divided and finely divided by the dividing element 11 is guided to the funnel-shaped part 14,
Further, it flows down inside the pipe 16 and reaches the convergence section 20 . Until reaching the convergence part 20, the divided and finely divided flow (core component) is caused by the polymer C (sheath component) introduced from the space 17 into the annular part formed between the pipe 16 and the hole 18. covered. Here, the annular portion regulates the flow of the polymer C, and in the core-sheath composite flow forming section 19, the core component flow that has flowed down inside the pipe 16 is surrounded by the sheath component flow that has flowed down the annular portion. This makes it possible to form a core-sheath composite flow. As mentioned above, at Z′, 1
4 and 16 form a composite core component supply path, and 18 forms a sheath component supply path. However, dividing element 1
If the diameter of the pipe 16 is slightly larger than or equal to the diameter of the outlet of the pipe 1, the funnel-shaped portion 14 is not necessarily required. On the other hand, if the diameter of the pipe 16 is considerably larger, it is preferable to form it into a truss-like shape.

The core-sheath composite flow reaches the convergence section 20, is converged, and is discharged from the discharge hole 21 as a single fiber. As the pipe 16 provided on the hard board, it is preferable to use a pipe with steps 15 as shown in the figure in order to prevent the pipe from slipping downward. As shown in the figure, the method for setting the pipe 16 is not particularly limited, and includes methods such as fitting, screwing, fusing, adhesion, and welding. Of course, it may also be formed integrally with the hard board.

The above is the basis of the present invention. However, on this basis many variations are possible which are included in the invention. I will mention some of them.

In W, as shown in FIG. 4, in place of at least some of the pipes 7, a pipe 23 having a cut in the middle may be used. This cut 2
The polymer B flowing into the pipe 23 from the pipe 23 merges with the distribution flow (polymer A) flowing from above, forming a combined flow and reaching the funnel-shaped portion. In this case, the outer wall of the pipe 23 and the hole 9 are brought into close contact.

Alternatively, as shown in FIG. 5, the pipe 24 may be installed so that the tip 25 of the pipe 24 is located directly below the hole 4 with a slight gap therebetween.
A pipe 24 is inserted into the hole 26 , and the pipe 24 is inserted into the hole 26 .
An annular portion is formed between the pipe 24 and the pipe 24 .
A space 27 is partitioned between the hard plate in which the hole 26 is drilled and the hard plate in which the other end of the pipe 24 is set. The space 27 becomes a passage for the polymer B. Polymer B flows from the space 27 to the hole 26 and the pipe 24
It rises up the annular part between the pipes 24, meets the distributed flow (polymer A) that has flowed down from the hole 4 at the tip 25 of the pipe 24, envelops it, flows down inside the pipe 24, and reaches the funnel-shaped part. Alternatively, a cut 28 or a small hole 29 may be made in the tip 25 of the pipe 24 as shown in FIGS. In this case, polymer B passes through the cut or the small hole into the pipe 2.
4, meets the distribution flow (polymer A), forms a combined flow, and flows down to the funnel-shaped portion.

In addition, in the configuration shown in FIGS. 2 and 3, when it is desired to further strengthen the fluid regulation function of the annular portion formed between the pipe 7 and the hole 9, the seventh
As shown in FIG. 8 and FIG. 8, it is preferable to provide a narrower part of the hole. Examples are shown in FIGS. 7 and 8. FIGS. 7 and 8 are enlarged views of the annular portion, where C is a cross-sectional view and D is a longitudinal cross-sectional view, respectively. In FIG. 7, a portion of the hole is narrowed so that the pipe does not come into contact with the hole wall. In FIG. 8, a portion has come into contact with the hole wall. There are two methods for forming the narrow portion, but it goes without saying that the specific shape thereof is not limited to those shown in FIGS. 7 and 8. Such a narrow portion may be located anywhere in the hole, but it is preferably located near the entrance.

The length of the pipe 7 is not particularly limited as long as it is long enough to form an annular portion with the hole 9. However, if the pipe 7 is long enough to protrude into the funnel-shaped part 10, the pipe will often get in the way when removing the hard plate with the funnel-shaped part 10 for cleaning, etc.; is preferable.

Further, W may be further configured as shown in FIG. 9, FIG. 10, FIG. 11, or FIG. 12. In each figure, A is a plan view and B is a longitudinal sectional view.

In W, the supply path for the polymer B to the composite flow forming portion may not be an annular portion, and a hole may be provided separately from the supply path for the polymer A. An example is shown in FIG. In FIG. 9, polymer B flows into the funnel-shaped part 10 through the hole 30, merges with the polymer A that has flowed down inside the pipe 7, and forms a bonding flow to form the dividing element 11.
will be introduced in Also, as shown in Figure 10,
A slit 32 is provided to divide a large number of holes 31, and the flow of polymer A distributed through the holes 31 is sandwiched between the slit flow of polymer B flowing down from the slit 32 and introduced into the dividing element 11 as a bonding flow. It may be configured as follows. Alternatively, as shown in FIG. 11, the holes 33 and 34 may be arranged every other hole, and the outlets of these channels may be arranged in one place. Polymer A and polymer B are distributed into holes 33 and 34, respectively, forming a composite flow forming section,
That is, they merge at the outlet 35 of the flow path of each hole and are introduced into the dividing element 11 as a bonded flow. Alternatively, as shown in FIG. 12, a large number of holes 36 may be provided so that the polymer A distributed and flowing down is surrounded by polymer B and introduced into the dividing element 11.

As can be understood from the above explanation, the role of the unit W is to distribute one island component flow led to the spinning device into many parts, combine it with other component flows, and form a covering flow or a bonding flow. , to converge into one flow and guide it to the dividing element 11. When introducing into the dividing element 11 a two-phase flow that is simply a composite of one component flow (polymer A) and one component flow (polymer B), the dividing element 11 At the outlet of the flow, polymer A and polymer B tend to form a mica-like flow in which polymers A and B are layered alternately, and it is difficult to form a flow in which one polymer is finely dispersed in the form of streaks in the other polymer. Therefore, in order to make a mica-like polymer flow into a fine streak-like polymer flow, the polymer flow is further passed through a subdivision layer such as a wire mesh, a sand grain layer, a porous sintered metal layer, or a porous layer of a honeycomb structure to separate the polymers from each other. It is necessary to change the form.

On the other hand, in the case of the present invention, in which one component stream (polymer A) is divided into many other component streams (polymer B) by the element W before being guided to the dividing element 11 and converged into one stream, At the exit of the element 11, one polymer has already become a stream dispersed in the other polymer, so even if the flow is immediately led to the convergence section 12 without passing through the repartition layer, one component This results in fibers having a structure in which the fibers are dispersed in a striped manner. Of course, it goes without saying that the light may be further passed through a re-division layer.
Here, in element W, one island component is present in many other island components (5 or more, preferably 10 or more).
The more the fibers are distributed, the more the number of streaks will be at the exit of the dividing element 11, and the finer the ultra-fine fibers will be. The degree of fragmentation of the polymer flow at the exit of the dividing element 11 is such that the larger the number of distributed polymer flows in the element W and the larger the number of dividing elements in the element Y, the finer the fragmentation becomes. Decreasing the number of elements and increasing the number of polymer flow distributions in the element W is a preferable direction for further stabilizing spinning.

The variations of element W in FIG. 2 and the matters regarding element Y described above are the same as those of elements W′ and
It will be easily understood that this is also applicable to Y'.

As shown in FIG.
The discharge hole 1 is connected to the dividing element 11 in which a flow path is formed.
3 or more may be matched and combined. The present invention also includes a device configured by arranging two or more of these combinations in parallel. Furthermore, as shown in FIG.
On the other hand, a plurality or more discharge holes 21 may be combined in correspondence with each other. The present invention also includes a device configured by arranging two or more of these combinations in parallel. Or one discharge hole 1 for one flow path of the dividing element 11.
3 (or discharge holes 21) in a corresponding manner,
The present invention also includes a device configured by arranging two or more of these combinations in parallel.

In the cap element Z', the mechanism for creating a composite flow is not necessarily limited to the system shown in FIG. The sheathing flow formation method shown in FIG. 5 may be used to form a core-sheath flow at Z'. Further, as shown in FIG. 15, the first passage of the covering flow forming method of element W in FIG. 2 may be used for forming the core-sheath flow at Z'.
Furthermore, as shown in FIGS. 16 and 17, a method that does not use pipes may be used.

In the device of the present invention, the cross-sectional shape of each hole (including the discharge holes 13 and 21), pipe, and funnel-shaped portion is most preferably circular, but it does not have to be circular; Needless to say, you can choose as appropriate. The same applies to the diameters of the holes and pipes.

The device of the present invention consists of one or more hard plates. The number of hardboards is not limited. This can be made as a single piece depending on the need, or conversely, it can be made by piling up several pieces of hardboard, but in either case, the final product is a single piece. The effects of the invention are exhibited. Second
The figures and FIG. 3 show examples of preferred moderate divisions. From the viewpoint of ease of cleaning and processing, it can be said that a split type is preferable.

There is no limitation to the overall shape of the spinning device, and it may be cylindrical, prismatic, or other shapes.

A variety of materials can be used for hardboard.
Examples include various types of stainless steel such as SUS-304, 316, and 630, iron, titanium, chrome steel, glass, quartz, ceramic materials, gold, platinum, and special synthetic polymers. Of course, it is also possible to combine two or more types of materials.

This spinning device can be used for all kinds of things such as melt spinning (including when spinning large items such as cuts that are immediately cooled in water), dry spinning, and wet spinning, and can be used for all known fibers, including the polymers used. Formable polymers can be used, and various combinations can be employed depending on the purpose.

The yarn obtained in this way is drawn continuously or discontinuously several times as necessary to adjust the strength and elongation, or is further subjected to appropriate heat treatment or shaping to become processed yarn, etc. All conventionally known high-order processing techniques such as deforming, processing into knitted fabrics, non-woven fabrics, etc., applying resin, removing some components, coating, dyeing, and chemical treatment can be applied.

Although the above description has been about fibers and their manufacturing equipment, the invention can also be applied to the production of molded products other than fibers.
For example, in the case of a film, any desired molded product can be obtained by changing the shape of the discharge hole 13 or 21 or by connecting an appropriate mold to the funnel-shaped part, and the above-mentioned apparatus is merely an example. Of course, the invention is not limited thereby.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a typical fiber spun by the spinning apparatus of the present invention. 2 and 3 are longitudinal sectional views of the spinning device according to the present invention. 4 and 5 are partial cross-sectional views of the upper part of the spinning device (element W or W') according to the present invention, showing mechanisms that can be used in addition to those shown in FIGS. 2 and 3. It is. FIG. 6 is a perspective view of the tip of the pipe 24 shown in FIG. 5, where l indicates a cut and m a small hole. 7 and 8 show the upper part of the spinning device (element W) according to the present invention.
or W′), where C is a cross-sectional view and D is a longitudinal cross-sectional view. 9, 10, 11 and 12 are a front view and a vertical sectional view of the upper part of the spinning device (element W or W') according to the present invention, and FIGS. This shows mechanisms that can be used in addition to those shown in . 13 and 14 are longitudinal sectional views of the lower part of the spinning device (elements Z and Z') according to the present invention, showing mechanisms that can be used in addition to those shown in FIGS. 2 and 3. It is. 15, 16, and 17 are longitudinal cross-sectional views of the lower part of the spinning device (element Z') according to the present invention, and show mechanisms that can be used in addition to those shown in FIG. 3. .

Claims (1)

[Scope of Claims] 1. A device for spinning a multicomponent fiber made of a composite of polymers A and B, characterized in that it has at least the spindle elements of ○A to ○C below. Textile spinning equipment. ○B A distribution section that distributes the polymer A guided into the spinning device into a plurality of channels, a composite flow formation section that combines the distribution flow and polymer B, and a composite flow formation section that engages with the distribution section and the composite flow formation section. a polymer A supply path, a polymer B supply section and a polymer A supply section engaged with the polymer B supply source and the composite flow forming section;
A cap element having a converging portion that converges a distributed flow and a composite flow consisting of polymer B into one flow. ○B In the flow process, the above converged composite flow is divided by ``splitting → position movement → superposition''.
A cap element having a stationary dividing element that forms a polymer flow consisting of a large number of finely divided phases in the flow direction by repeating this multiple times as one unit. C. A cap element having a convergence part and a discharge hole for converging and discharging the polymer flow multiphased by the stationary dividing element. 2 An apparatus for spinning a multicomponent fiber in which a core component of a composite of polymers A and B is coated with a sheath component made of polymer C, and has at least the spindle elements of ○A to ○C below. A spinning device for multi-component fibers characterized by: ○B A distribution section that distributes the polymer A guided into the spinning device into a plurality of channels, a composite flow formation section that combines the distribution flow and polymer B, and a composite flow formation section that engages with the distribution section and the composite flow formation section. a polymer B supply path and a polymer A supply path engaged with the polymer B supply source and the composite flow forming section;
A cap element having a converging portion that converges a distributed flow and a composite flow consisting of polymer B into one flow. ○B In the flow process, the above converged composite flow is divided by ``splitting → position movement → superposition''.
A cap element having a stationary dividing element that forms a polymer flow consisting of a large number of finely divided phases in the flow direction by repeating this multiple times as one unit. ○C A composite flow forming part that combines the polymer flow multiphased by the stationary dividing element and the sheath component (polymer C), and a composite core engaged with the stationary dividing element and the composite flow forming part. a composite supply path, a sheath component supply path opened to the composite flow forming section and engaged with a sheath component (polymer C) supply source, a convergence section and a discharge hole for converging and discharging the composite flow. and a cap element having.