JPH0465508A - Spinneret for three-component sheath-core structure spinning - Google Patents

Abstract

PURPOSE:To obtain a three-component sheath-core structure fiber having a sheath part divided into two parts by forming a small recess and introduction groove in a specific state on the lower face of a main distribution plate or the upper face of a spinneret plate. CONSTITUTION:A small recess 30 and introduction grooves 32, 33 are formed on the lower face of a main distribution plate 3 or upper face of a spinneret plate. The main distribution plate is provided with vertical holes 31, 34. Two sheath-component dopes B, C are joined with each other immediately before entering into a spinning nozzle in a sheath-joining small recess 30 around the perpendicular hole 31 for the introduction of a core component dope A.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a sheath section consisting of two sheath sections having different components and dividing the fiber surface into two, and a core section consisting of one core component force 1. The present invention relates to a three-component sheath-core type composite spinneret device which has a simple structure and is difficult to damage, for spinning a three-component sheath-core type composite fiber consisting of the following.

[Conventional technology]

Composite fibers have many useful properties and are used in a variety of applications. A three-component sheath-core type conjugate fiber, which consists of a sheath section consisting of two sheath zones that have different components and divide the fiber surface into two, and a core section consisting of one core component, constitutes the sheath section. By combining various components of the two sheath zones, the properties of the surface of the composite fiber, such as feel, color, and thermal properties, can be varied to expand the range of uses. However, because the structure of the cap device for forming a composite structure is complicated, most of the fibers in practical use are bicomponent composite fibers.

A conventional spinneret device known for using three components and similar to a sheath-core type composite fiber is
The one described in No. 123406 is shown. This product can have various composite structures, but in cases similar to the sheath-core type, the resulting composite structure is a sheath.

In addition to the normal sheath-core structure consisting of two core components, there is a third component.
It has a unique structure in which the components fit together in a cross shape (the four tips of the cross appear on the fiber surface), and the sheath-core structure consisting of the above two components is divided into four parts, and its spinnability is also poor. It is. The spinneret device has a lower plate and an upper plate overlaid on a spinneret plate having spinning holes in the subsequent portion, and the spinneret device is designed so that each component stock solution is supplied independently. It has a structure in which an inverted T-shaped cylindrical tube with a bottom is fitted into a hole whose center is the same as the spinning hole. Such a cap device has one
Two cylindrical tubes are inserted, making it extremely difficult to handle when dividing, cleaning, and assembling.

It often causes damage. Furthermore, since the inverted T-shaped cylindrical tube with a bottom is provided with many slits and pores, its manufacture requires precise machining and is very expensive.

[Problem to be solved by the invention]

The present invention solves the above-mentioned drawbacks of the prior art, and provides a spinneret device which has a simple structure and is difficult to damage, and which can obtain a three-component sheath-core type composite fiber which is a normal sheath-core type and has a sheath section divided into two zones. The challenge is to configure it in such a way.

[Means to solve the problem]

As a result of various studies, the inventor of the present invention has found that small chambers are provided in a concave shape on the lower surface of the main distribution plate that is placed on the spinneret plate at positions facing the spinning holes, and two sheath component stock solutions are allowed to flow into these small chambers facing each other. After joining, an introduction groove is placed in the main distribution plate itself, which is arranged so as to surround the core component stock solution and flow it into the spinning hole together with it, and at this time, so as not to disturb the formation state of the desired composite structure. The present invention was completed by determining that the above-mentioned problem could be solved by providing it on the lower surface.

Hereinafter, the present invention will be explained with reference to the drawings.

Fig. 1 is a partial bottom view showing an arrangement example of the joining chamber and introduction groove group for the sheath component stock solution provided on the lower surface of the main distribution plate of the device of the present invention, and Fig. 2 is an enlarged view of the main part of another arrangement example. Figure 3 is an enlarged view of the main parts of another arrangement example, Figure 4 is a partial top view of the main distribution plate in Figure 1, and Figure 5 is a partial top view of the upper structure above the main distribution plate. A partial top view of the first distribution plate as a member constituting one example, FIG. 6 is a partial top view of the second distribution plate,
FIG. 7 is a cross-sectional explanatory diagram of one example of the device of the present invention, and FIG.
A diagram corresponding to the figure and showing a different arrangement from the present invention, FIG. 9 (
A) to (F) are cross-sectional views of various ternary composite fibers mainly of sheath-core type.

For example, as shown in FIG. 9(a), the present invention provides a sheath consisting of two sheath sections having different components and dividing the fiber surface into two. A spinneret device 1 as shown in FIG. 7 is used for spinning a three-component sheath-core type composite fiber consisting of a core component A and a core component A. The components of the main distribution plate 3 and the upper structure 4 are sequentially stacked on top of each other. A plurality of rows of spinning holes 20 are arranged in parallel on the spinneret plate 2, and the main distribution plate 3 predetermines a total of three component stock solutions, two sheath component stock solutions B and C and one core component stock solution A. The upper structure 4 contains the stock solutions A and B of each component.

It has a mechanism to adjust the pressure of C through nine independent paths and supply it to the vertical holes for introducing the stock solution of each component which are opened on the upper surface of the distribution plate 3. The shape of the spinning holes 20 of the spinneret plate 2 may be of any commonly used shape, including irregular shapes and hollow shapes, as long as the arrangement of the spinning holes 20 is compatible with the apparatus of the present invention. The structure and its constituent members can also be applied to known ones, or modified versions of known ones as shown in examples later.

The feature of the present invention lies in the structure of the main distribution plate 3. That is, on the lower surface of the main distribution plate 3, as shown in FIG. 7, sheath component stock solution bonding chambers 30 are formed in a concave shape at each position facing the spinning hole 20 in the state where it overlaps with the spinneret plate 2, as shown in FIG. They are arranged in rows as shown. The shape of the sheath component stock solution joining chamber 30 is preferably circular, like an inverted shape, but an elliptical shape is also acceptable.

As shown in FIG. 2, the core component stock solution A
A vertical hole 31 for introducing the stock solution of the core component is provided to penetrate between the upper surface and the top surface (therefore, in each of Figures 1, 2, and 3, the vertical hole 31 for introducing the stock solution of the core component is located at the center of the chamber. (It also shows the location of the part). As shown in FIG. 1, a sheath component stock solution introducing groove 32 for each sheath component stock solution is sandwiched between the rows of the sheath component stock solution joining chambers 30 (hereinafter, in the specification and drawings as necessary, the sheath component stock solution introduction groove 32 is for the sheath component stock solution B). 32B and for sheath component stock solution C may be distinguished by adding B and C, such as 32C.The same applies to other members and core component stock solution A). Each sheath component stock solution introduction groove 32B
, 32G has a vertical hole 34B for introducing the sheath component stock solution to receive the sheath component stock solutions B and C from the upper structure.
, 34C penetrate between the upper surface and the lower end thereof to open into the sheath component stock solution introduction grooves 32B and 32C. Sheath component stock solution joining chamber 32B.

32C and the center of the small chamber are preferably approximately equidistant (each α in FIG. 1 is approximately equal). The number of spinning hole rows, and therefore the number of rows of sheath component stock solution joining chambers 30, is generally plural, and the sheath component stock solution introduction grooves 32 sandwich them except for the outermost one as shown in FIG. It is shared by the rows of sheath component stock solution joining chambers 30 on both sides. As shown in FIG. 1, between the sheath component stock solution introducing groove 32 and the sheath component stock solution joining chamber 30, there is a sheath component stock solution introduction section for flowing each sheath component stock solution into the sheath component stock solution joining chamber 30, as shown in FIG. There are four branch grooves (hereinafter simply referred to as branch grooves) 33, two for each sheath component stock solution in each sheath component stock solution joining chamber 30.

It is provided so that the inflow direction X is directed outward from the center of the small chamber from the side position.

There are various arrangements of the branch grooves 33. - For boat fishing, the four branch grooves 33 are directed outward from the center of the chamber as described above, but preferably each inflow direction X is directed toward the center of the chamber as shown in FIG. It is deviated by an angle θ equal to the direction. In this case, when the shape of the sheath component stock solution joining chamber 30 is circular or elliptical (the long axis or the short axis is parallel to the sheath component stock solution introduction groove 32), the inflow port of each branch groove 33 to the sheath component stock solution joining chamber 30 P, Q,
The branch grooves 33 can be arranged so that the rectangle with R and S as vertices becomes a right-angled quadrilateral with the center of the chamber as the intersection of diagonals. With this arrangement, direct collision of the sheath component stock solutions B and C with the core component stock solution A in the sheath component stock solution joining chamber 30 is avoided, and the flow state is stable, and the core component stock solution A is spinning hole 2 with almost no eccentricity.
0, a concentric sheath-core type composite fiber is obtained. Different from the above, when there is only one branch groove 33 on each side as shown in Fig. 8, or when the inflow direction X of any one of the branch grooves 33 is directed toward the center of the chamber. In this case, the flow state in the sheath component stock solution joining chamber 30 becomes unstable, or the sheath component stock solution B or C directly collides with the core component stock solution A, resulting in large eccentricity and fluctuations.

As a special case in the case of FIG. 2, each branch groove 33 is
They may be arranged in parallel as shown in the figure. Further, the sheath component stock solution introduction vertical hole 34 that opens into the sheath component stock solution introduction groove 32 is the first
In the figure, vertical holes 34 for introducing the stock solution of the core component and vertical holes 31 for introducing the stock solution of the core component are provided on the upper surface of the main distribution plate 3, as shown in FIG.
The vertical holes 34 for introducing the sheath component are opened for each vertical hole 31 for introducing the stock solution for the core component.
It is not necessary to provide the sheath component stock solution B, depending on the amount of spinning bath.
As long as a sufficient amount of C can be supplied, the interval may be widened.

In the device of the present invention, the sheath component stock solution introduction hole 32 is not provided, but instead of the sheath component stock solution introduction hole 34 as shown in FIG.
may be directly connected to the end of the branch groove 33. in this case,
The number of sheath component stock solution introduction vertical holes 34 is equal to the number of ends of the branch grooves 33, but as shown in FIG. 34 can be reduced.

In addition, in the device of the present invention, the sheath component stock solution bonding chamber 30.
Sheath component stock solution introduction groove 32. and sheath component stock solution introduction branch groove 33
It is also possible to provide a device having the same function and effect by providing part or all of it on the upper surface of the base plate 2 without changing the positional relationship of each part explained above.

The vertical hole 31 for introducing the core component stock solution is opened on the top surface of the main distribution plate 3. Sheath component stock solution introduction vertical holes 34B and 34
Add each component stock solution A, B, and C to C at a pressure of 11! ! As the structure of the upper structure 4 for independently supplying spinnerets, a known one can be applied, but the following will be described below, which is an improved version of a known two-component composite spinneret device for three-component spinnerets. I'll keep it.

As shown in FIG. 7, this upper structure 4 has a cap 40.
．． It consists of a first distribution plate 41 and a second distribution plate 42 stacked one on top of the other in order.

The cap 40 is provided with two partition walls 402 that partition the space between it and the first distribution plate 41 into three stock solution storage chambers 401, each of which contains stock solution storage chambers 401A, 401B, and 40.
1C has stock solution supply holes 403 (403
A, 403B, and 403C) are provided.

As shown in FIG. 5, the first distribution plate 41 has stock solution storage chambers 401 A and 40 which are overlapped with the cap 40.
1B.

401C and corresponding parts 41OA, 410B,
In 410C, stock solution distribution holes 411A, 411B, 41 for guiding each stock solution A, B, and C to the second distribution plate 42 are provided.
Each stock solution distribution groove 420A, 420B, 4 in a state in which 1C is overlapped with a second distribution plate 42, which will be described next.
They are provided at positions corresponding to 20C. Usually, the filter 5 is held between the cap 40 and the first distribution plate 41 as a support.

The second distribution plate 42 has a stock solution distribution groove 42 as shown in FIG.
0A, 420B, 420C are provided,
In each groove, there are vertical holes 31 for introducing the core component stock solution in a state where the main distribution plate 3 is overlapped with the main distribution plate 3. Sheath component stock solution introduction vertical hole 34B
and each stock solution pressure adjustment hole 421A at the position connected to 34C.
, 421B and 421C are provided therethrough. Therefore, when rotating, each stock liquid pressure adjustment hole 4 in FIG.
The arrangement of 21A, 421B, 421C is the fourth
The arrangement of the stock solution introduction vertical holes 31, 34B and 34C in the figure corresponds to each stock solution A, B, and C, respectively. The stock solution distribution groove 420 on the upper surface of the second distribution plate 42 receives each stock solution A in the stock solution pressure so-called adjustment holes 421 arranged as described above.

There is a common stock solution distribution groove 420 for supplying each stock solution to each of the groups arranged in rows B and C. Each stock solution distribution hole 411A of the plate 41.

411B and 411C are provided.

Therefore, cap 40. First distribution plate 41. Second distribution plate 42
are sequentially stacked from above to each stock solution supply hole 403A.
, 403B, and each stock solution A supplied from 403C
, B, and C are stock solution storage chambers 401 for each stock solution A, B, and C,
M liquid distribution hole 411, stock liquid distribution groove 420. Stock liquid pressure iI
! The stock solution is supplied to each of the stock solution introduction vertical holes 31, 34B and 34C that are opened on the upper surface of the main distribution plate 3 independently by stacking the adjustment holes 421 one after another without mixing with each other.

The device 11 according to the invention has one or more base plates 2. The components of the main distribution plate 3° and the upper structure 4 are stacked one after another in a case 6 from the bottom as shown in FIG. 7, and are fastened together with bolts 7.

[For production]

Each of the component stock solutions A, B, and C is pressure-adjusted through the upper structure 4, and is independently supplied to each stock solution introduction vertical hole 31, 34B, 34C that opens on the upper surface of the main distribution plate 3. The core component stock solution A passes through the core component stock solution introduction vertical hole 31, passes through the center of the sheath component stock solution joining chamber 30, and is guided to the spinning hole 20. The sheath component stock solutions B and C pass through the sheath component stock solution introduction vertical holes 34B and 34C, respectively, and enter the sheath component stock solution distribution groove 32.
B and 32C (as shown in Fig. 3, there are cases where the flow is directly without passing through this), and as shown in Fig. 2, 2
It flows into the sheath component stock solution junction chamber 30 through successive branch grooves 33B and 33C. Their inflow direction or facing each other and avoiding the center and flowing widely to the outside.

It does not directly collide with the core component stock solution A passing through the center and push it to one side or fluctuate and disturb the flow state, and in particular, θ shown in Figure 2 is the same for all four inflow directions X. And the inlet P.

When Q, R, and S form a right-angled quadrilateral and the intersection point T of their diagonals is in the center of the chamber, the flow and bonding state of both component stock solutions B and C in the sheath component stock solution joining compartment 30, that is, B, It is very stable at the boundary of C. Then, a sheath-core composite structure is formed by surrounding the core component stock solution A in the center of the chamber, and the spinning hole 20 is formed by forming a sheath-core composite structure.
The raw solution flows down to the spinning hole 21 and is spun out from the spinning hole 20 without changing its composite structure.

The cross section of the composite fiber obtained in this way is similar to that of a standard composite fiber as shown in Fig. 9 (a) if the supplied amounts of sheath component stock solutions B and C are the same (composition ratio between components is 1 = 1). When the hollow base plate 2 is used, the structure becomes as shown in Fig. 9 (b).
Therefore, even if the supply amounts of sheath component stock solutions B and C are varied and the composite ratio between the components is set to other than 1:1, a composite structure in which the sheath and core are concentric as shown in Figure 9 (c) can be obtained. If the shape of the spinning hole 20 is modified, it will be as shown in FIG. 9(d), for example. In addition to the above, by arranging the core component stock solution introduction vertical hole 31 and the spinning hole 20 not coaxially but slightly offset, it is also possible to obtain a three-component sheath-core type composite structure with an eccentric assembly structure. For example, if the inflow direction X of the sheath component stock solutions B and C into the sheath component stock solution joining chamber 30 as shown in FIG. If the shell component is facing toward the
The internal flow may circulate and become unstable, or the flow of the core component stock solution may be pushed to one side, resulting in something like Figure 9 (e) and (e).

〔Effect of the invention〕

The three-component sheath-core type composite spinneret device according to the present invention is as follows.

In order to combine each component stock solution to form the desired composite structure, small chambers and introduction grooves are provided in the lower surface of one main distribution plate in a concave shape (sometimes provided on the upper surface of the base plate), and vertical holes are provided through the main distribution plate. This is possible due to the simple structure provided with the sheath component, and furthermore, it is possible to prevent the two sheath component stock solutions from directly colliding with the flow of the core component stock solution in the sheath component joining chamber just before flowing into the spinning hole, and to maintain the bonding state of both components. By configuring it to be stable, it has the following effects.

First, only one main distribution plate or the same number of members is required to adjust each component stock solution to the desired composite structure, and this main distribution plate does not have any complicated structure. Therefore, the cap device constructed with the exemplified upper structure and the cap plate is very easy to handle during various operations such as disassembly, cleaning, and assembly, and will not be damaged. In addition, since it can be manufactured by relatively simple cutting and drilling processes, high-density processing such as increasing the number of spinning holes is possible, and the manufacturing cost is low.

Second, the overall flow of the two sheath component stock solutions in the sheath component stock solution joining chamber is very stable with respect to the flow of the core component stock solution, so the vertical hole for introducing the core component stock solution and the spinning hole should be aligned coaxially. If they are arranged, a composite structure in which the sheath and core are concentric can be obtained even when the composite ratio between components is 1: or other than 1.Thirdly, for the same reason as the second, the vertical hole for introducing the core component stock solution and the spinning hole can be obtained. By arranging them on different axes, an eccentric sheath-core structure can be consistently obtained.

Fourthly, for the same reason, the sheath-core composite ratio.

Even when composite structures are formed with various composition ratios, irregular shapes, eccentricities, etc., stable spinning can be achieved for a long period of time.

[Brief explanation of the drawing]

Fig. 1 is a partial bottom view showing an arrangement example of the joining chamber and introduction groove group for the sheath component stock solution provided on the lower surface of the main distribution plate of the device of the present invention, and Fig. 2 is an enlarged view of the main part of another arrangement example. Figure 3 is an enlarged view of the main parts of another arrangement example, Figure 4 is a partial top view of the main distribution plate in Figure 1, and Figure 5 is a partial top view of the upper structure above the main distribution plate. A partial top view of the first distribution plate as a member constituting one example, FIG. 6 is a partial top view of the second distribution plate,
FIG. 7 is a cross-sectional explanatory diagram of one example of the device of the present invention, and FIG.
A diagram corresponding to the figure and showing a different arrangement from the present invention, FIG. 9 (
A) to (F) are cross-sectional views of various ternary composite fibers mainly of sheath-core type. 1... Three-component sheath-core composite spinneret device according to the present invention 2... Spinneret plate 20... Spinning hole 21... Stock solution inlet 3... Main distribution plate 30... ... Sheath component stock solution joining chamber 31 ... Core component stock solution introduction vertical hole 32 ... Sheath component stock solution introduction groove 33 ... Sheath component stock solution introduction branch groove 34 ... Sheath component stock solution introduction vertical hole 4... Upper structure 40... Cap 401... Stock solution storage chamber 402... Partition wall 403... Stock solution supply hole 41... First distribution plate 410... Area 41 corresponding to each stock solution storage chamber of the cap
1... Raw solution distribution hole 42... Second distribution plate 420... Raw solution distribution groove 421... Raw solution pressure WI4W hole 5... Filter 6... Case 7...・Bolt A...Core component stock solution B, C...Sheath component stock solution a...Core S, C...Sheath segment bands P, Q, R, S...Double solution flow Inlet T...Intersection of diagonals X...Sheath component inflow direction

Claims (1)

[Scope of Claims] 1. A three-dimensional sheath consisting of two sheath zones (b) and (c) having different components and dividing the fiber surface into two, and a core (a) consisting of one core component. A spinneret plate (2) with multiple spinning hole rows arranged in parallel for spinning component sheath-core composite fibers.
, three component stock solutions (A), (B), (
A main distribution plate (3) for supplying C) to form a predetermined composite structure, and vertical holes (31), (34B), (34B), ( 34C)
A spinneret device consisting of sequentially stacking each constituent member of an upper structure (4) having a mechanism for independently supplying the component stock solutions (A), (B), and (C) to a main distribution plate. (
3) On the lower surface, sheath component stock solution bonding chambers (30) are provided in a concave row at each position facing the spinning hole (20), and the center of each sheath component stock solution bonding chamber (30) is provided at each position facing the spinning hole (20). A core component stock solution introduction vertical hole (31) for introducing the core component stock solution (A) is provided to penetrate between the top surface and the core component stock solution (A). Sheath component stock solution (B
), (C) are provided with sheath component stock solution introduction grooves (32), and the sheath component stock solution (B) is introduced from each sheath component stock solution introduction groove (32B), (32C) into the sheath component stock solution joining chamber (30). ,(C
A total of four sheath component stock solution introduction branch grooves (33), two for each sheath component stock solution (B) and (C), are inserted into each joint chamber (30) for inflowing the sheath component stock solution (30). 30)
The inflow direction (X) is directed outward from the center of the chamber from the side position of the sheath component stock solution introduction groove (3).
2) A three-component sheath-core type composite spinneret device (1) characterized in that a vertical hole (34) for introducing a sheath component stock solution, which is open at the lower end, is provided to penetrate between the upper surface and the upper surface. 2. The three-component sheath-core composite spinneret device according to claim 1 (
In 1), the sheath component undiluted solution joining chamber (30), the sheath component undiluted solution introduction groove (32), and the sheath component undiluted solution introduction branch groove (33)
A three-component sheath-core composite spinneret device (1) characterized in that a part or all of the
). 3. In the three-component sheath-core type composite spinneret device (1) according to claim 1 or 2, the sheath component undiluted solution introduction vertical hole (34) is used to introduce the sheath component undiluted solution without providing the sheath component undiluted solution introduction groove (32). A three-component sheath-core composite spinneret device (1) characterized in that it is directly connected to the end of the branch groove (33).
). 4. Claim 1, wherein the sheath component stock solution joining chamber (30) is circular.
The three-component sheath-core type composite spinneret device (1) according to any one of items 3 to 3. 5. The three-component sheath-core type composite spinneret device (1) according to claim 4, wherein the inflow direction (X) of the sheath component stock solution introduction branch groove is spaced equiangularly from the center of the sheath component stock solution joining chamber (30). ). 6 Inflow ports (P), (Q), (R), (S
The three-component sheath-core type composite spinneret device (1) according to claim 5, wherein the 3-component sheath-core type composite spinneret device (1) according to claim 5, wherein the 3-component sheath-core type composite spinneret device (1) forms the apex of a right-angled quadrilateral with the center of the chamber as the intersection point (T) of the diagonals. 7. The three-component sheath-core type composite spinneret device (1) according to claim 6, wherein the branch grooves (33) for introducing each sheath component stock solution are parallel.