KR870001366B1 - Hollow mixed fiber's spinnert apparatus - Google Patents

Abstract

This invention relates to the spinneret apparatus of hollow composite fiber which makes a joing of segments uniform and has an excellent spinning and elongating operation. In this apparatus, the dividing hole (3) is arranged circularly, and the polymer (A) is distributed along the slit (6) and another polymer (B) is distributed along the slit (8). Polymers (A) and (B) are alternated in the joining hole (5). At this time the ratio of the dia. of joining hole to the dia. of dividing hole is 0.2-0.8.

Description

Hollow composite fiber spinning cap

1 is a cross-sectional view of the present invention.

2 is a cross-sectional view taken along the line I-I of FIG.

3 is a cross-sectional view taken along the line II-II of FIG.

Figure 4 is an exemplary cross-sectional view of the hollow composite yarn spun by the present invention.

5 is a cross-sectional view of a conventional multilayer spliced fiber (composite yarn).

* Explanation of symbols for main parts of the drawings

1: Distribution Plate 2: Storage Room

3: distribution hole 4: spinneret

5: confluence 6

7: distribution hole 8: three

9: Spinner Ball 9 ': Thrit

D ₁ : diameter of the distribution hole (3) row D ₂ : diameter of the distribution hole confluence hole

T: Width of the slit 9 'W: Spacing between the slit 9'

P: Slit diameter

The present invention is a multilayer bonded hollow composite fiber in which two or more polymer melts (hereinafter, referred to as polymers), such as polyester and nylon, are divided into a plurality of segments in a spinning process and hollow is formed at the center of the fiber. It relates to a hollow composite fiber spinneret device for spinning, in particular, the present invention relates to a spinneret device having a characteristic of uniformly divided division of the segments, simple separation and excellent spinning, stretching.

Recently, various manufacturing methods have been proposed as interest in the development of ultrafine spring oil, for example, 0.01-0.1 denier (ultrafine fiber) as a yarn necessary for manufacturing artificial leather or high density fabrics.

However, in the conventionally proposed method, many problems have yet appeared to be practically used industrially, and it is very difficult to actualize.

)의 효과를 기대하기가 어려운 결함이 나타나고 있었다.For example, in the case of the island-in-the-sea fiber composited with nylon and polyate in the island-in-the-sea phase, the spinning device is complicated and requires a lot of equipment cost. Since the nylon component must be removed by solvent treatment, it shows various economical defects such as being very separated from the manufacturing cost, and is also a non-porous type manufactured by a known technique as shown in FIG. In the case of the composite fiber, the manufacturing method has a simple advantage, but since the separation of the composite fiber is difficult and the fineness after separation is very fine

It was hard to expect the effect of).

The present invention has been made in order to solve the above-mentioned defects, the present invention can effectively manufacture microfiber yarns and its purpose is to provide a simple spinneret, and the division of each segment during spinning, As the bonding state is uniform, the separation operation is simple, and the spinning and drawing workability is excellent to provide an excellent quality microfiber, which will be described in detail with reference to the accompanying drawings and examples.

FIG. 1 shows an overall longitudinal cross-sectional view of the spinneret apparatus of the present invention, and FIG. 2 shows a cross-sectional view taken along the line I-I of FIG.

As shown in FIGS. 1 and 2, the distribution plate 1 forms a storage chamber 2 into which the polymer A flows in a central portion thereof, and communicates a plurality of distribution holes 3 to the lower portion of the storage chamber 2. They are laid in an annular shape, and each of the distribution holes 3 is arranged in an annular manner at intervals of the diameter D ₁ .

Below the distribution holes 3 arranged in an annular shape, horizontally narrow slits 6 are radially installed toward the center of the confluence hole 5 of the spinneret 4, and are horizontally and radially installed narrowly. Between the slits 6 a narrow throat 8 communicating with the lower part of the distribution hole 7, into which another polymer B of the upper distribution plate 1 flows, also faces the center of the confluence hole 5. As shown in FIG. 2, radially disposed and disposed.

The polymer (A) thus enters the cylindrical polymer (2) reservoir above the distribution plate (1) and then opens a plurality of annular distribution holes (3) (8 in FIG. 2). Through the relatively narrow slit 6 and flows in a high speed in the horizontal direction, and then merges in the confluence hole 5 of the spinneret 4. Another polymer (B) is introduced at a low speed through the distribution hole (7), and then at a high speed in the radial narrow throat (8).

Segments of polymers (A) and (B), which are alternately divided at each slit (6) (8) and flowed in at high speed, have a diameter (D ₁ ) smaller than the diameter (D ₁ ) of a plurality of rows of distribution holes (3) arranged in an annular fashion. _{Since the} joints are joined at the joining holes 5 having ₂ ), the segments of the polymers (A) and (B) do not mix with each other or cause phase change.

D₂/D₁

0.8의 범위가 가장 바람직하다.In this case, it is important that the diameter D ₂ of the joining holes 5 is smaller than the diameter D _{1 of the} row of distribution holes 3 in which the distribution holes 3 are arranged in an annular shape. For example, when the diameter (D ₂ ) of the confluence hole (5) is larger than the diameter (D ₁ ) of the row of distribution holes (3), the segments of the homogeneous polymer (A) or (B) are bonded to each other and the size of the segment is uniform. In the severe case, the phase change occurs in the same shape as the above-mentioned island-in-the-sea island shape, and the diameter D ₂ of the joining holes 5 should be smaller than the diameter D _{1 of the} row of distribution holes 3. One 0.2

D ₂ / D ₁

The range of 0.8 is most preferred.

In addition, the research results prove that the number of segments bonded to a single strand of fibers in the present invention is also one of the very important factors. Get mad.

In the present invention, the heterogeneous polymers having no compatibility are physically bonded to each other, and the heterogeneous polymers that are easily bonded even with a small impact are divided in the fiber state. Therefore, the joining force between these segments has a direct correlation with the number of segments. Accordingly, when the number of segments is small, the joining force is lowered because the length of the relative joint surface (the length of the segment section divided by the segment section) is reduced. Accordingly, if the bonding force is small, problems such as wool, looping, roller winding, and trimming occur due to unnecessary splitting in the spinning or stretching process. For example, when two pieces of nylon and polyester are spun. In case of spinning, 100% splitting resulted in the problem of poor spinning and impossible stretching.

Therefore, in consideration of two problems of dispensing polymer dissimilarity and manufacturing workability, it can be seen that the number of segments in the present invention is most preferably in the range of 12 to 32.

In addition, the size of the hollow portion (Hollow) formed in the fiber center portion determines the segmentability of the segment, the larger the hollow ratio showed a result that the splitability is increased. In fact, in the case of the non-porous composite fiber by the conventional spinneret as shown in FIG.

On the other hand, in the case of the hollow composite fiber according to the present invention, since the segments are joined in a completely divided state, the separation process is very simple and the separation state is also perfect.

However, when the hollow part is too large, as mentioned above, since the relative bonding length between the segments is small and the bonding force is lowered, there is a problem that separation occurs during yarn manufacturing, that is, spinning or drawing.

On the contrary, when the hollow ratio is too small, it becomes difficult to form a hollow or a non-porous shape becomes impossible to separate.

Therefore, about 0.5 to 2% is most preferable with respect to the cross-sectional area of the hollow fiber composite (F) of this invention shown in FIG.

FIG. 3 is a cross-sectional view of the hollow forming spinneret 9 as a cross-sectional view taken along line II-II of FIG. 1, and the adjustment of the hollow ratio of the composite fiber F is performed by the slit 9 'of the spinneret 9; Ratio (W / T) of the spacing (W) between the width (T) and the slit (9 ') and the ratio (P /) of the width (T) and the slit pore diameter (P) of the slit (9'). Determined by the combination of T), the formula for calculating the hollow ratio is as follows.

(expression)

The two or more polymers of the present invention as described above are divided and divided into a plurality of segments by a distribution plate 1 alternately provided with radial slits 6 and 8, respectively, and then a spinneret 4 By joining and joining in the confluence hole 5, the phase change of each segment does not occur, and accordingly, the spinning and drawing property is excellent and the separation (miniaturization) operation can be easily performed as a simple facility.

It demonstrates concretely based on an Example and a comparative example below.

Example 1

Conventional melt extrusion apparatus and metering feeder introduce molten polyester and nylon polymer into the distribution plate 1 at a rate of 20 g / min, respectively, and count the number of slits 6 and 8 of the distribution plate 1, respectively. A total of 16 pieces each of 8 pieces are divided and divided into 16 segments, and then the space W between the width T of the slit 9 'of the spinneret 9 of the spinneret 4 and each slit 9'. ) Ratio (W / T) of (W / T = 1) and the ratio of the slit pore diameter (P) to the width (T) of the slit (9 ') is 9 (P / T = 9). The non-drawn yarn with a hollow ratio of 1.5% was spun through the type 4 hollow mold 9. The spun unstretched yarn was stretched 3.25 times, stretched and woven at a fineness of 90d / 48f strength 4.2g / d and 35% elongation, and then relaxed and heat treated with hot water at about 100C to separate and finely separate each segment.

D₂/D₁

0.8의 조건으로 실시하였다.The emission ratio is 0.2 when the joining ball (5), the diameter (D ₂₎ and the dispensing column ball diameter (D ₁₎ of the spinneret (4)

D ₂ / D ₁

It carried out on the conditions of 0.8.

Phase change and division did not occur in the spinning process in this embodiment, the elongation and weaving was very good and separation of each segment was also perfect.

The results are shown in Table 1.

Comparative Example 1

When spinning, the diameter (D ₂ ) of the confluence hole (5) of the spinneret (4) and the diameter (D ₁ ) of the distribution column were the same, and were carried out in the same manner as in Example 1.

As a result, two segments of polyester were joined at the joining part of the spinneret, and the fineness of the fine particles appeared after each segment separation, and the drawing operation was poor because the segment separation was poor. same.

Comparative Example 2

The spin hole 9 of the spinneret 4 was formed in the same manner as in Example 1 except that W / T = 1.1 and P / T = 12 were used to obtain an undrawn yarn having a hollow ratio of 5%.

As a result, separation occurs during spinning and drawing, and the results are shown in Table 1.

Comparative Example 3

It carried out similarly to Example 1, having four segments. As a result, all the undrawn yarn segments were separated and the drawing operation was impossible. The results are shown in Table 1.

Comparative Example 4

Eight segments were performed in the same manner as in Example 1, and most of the spun yarns of the unstretched yarn separated were not softened. The result is shown in (Table 1).

Comparative Example 5

The spinneret 4 was formed in a circular rather than hollow shape under the same conditions as in Example 1, but excellent in spinning, stretching, and weaving, but hardly split during heat shrinkage treatment. Because the segments are bonded, the effect of the microfibers on the final product could not be expected.

The results are shown in Table 1.

TABLE 1

Claims (2)

In the spinneret of a multilayer bonded hollow composite fiber in which two or more kinds of polymers such as polyester and nylon are divided into a plurality of segments in a fiber cross section and arranged radially, a plurality of distribution holes 3 are arranged in an annular manner, A narrow throat 6 is radially drilled between the lower end outlet of the distribution hole 3 and the center of the confluence hole 5 of the spinneret to distribute the polymer A, and another polymer between the throat 6. A hollow composite characterized in that the throat 8 is radially drilled between the centers of the joining holes 5 to distribute different polymers B so that different polymers A and B are alternately separated and distributed. Fiber spinning caps. 2. The hollow according to claim 1, wherein the size of the diameter D ₂ of the joining holes 5 and the diameter D _{1 of the} row of distribution holes 3 is in the range of 0.2 = D ₂ / D ₁ = 0.8. Composite fiber spinneret device.

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