JPS6344464Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Technical Field of the Invention The present invention relates to a die for sea-island composite fibers that has excellent spinnability and is inexpensive.

B. Prior art and its problems Conventionally, sea-island composite fibers, which have multiple filaments that are substantially continuous in the fiber axis direction in one fiber, have been effectively used as synthetic leather and synthetic leather-like textile materials. Various spinnerets have also been proposed for producing these sea-island composite fibers.

As is well known, the most common and excellent method for producing sea-island type composite fibers is to first substantially form a core-sheath type composite flow, then aggregate a large number of these fibers in a molten state, and then spin the fibers. The cap has a flow path for the sea component between at least two upper and lower cap plates, and is combined with a group of tubular bodies for introducing the island component.

However, conventionally, in order to determine the fineness distribution of multiple island fibers present in one fiber, the die for such sea-island type composite fibers is first measured by weighing the island component polymer with a weighing plate, and then measuring the inner diameter and Since it is necessary to introduce the island component into a tubular body with the same outer diameter, the number of caps such as measuring plates for the island component becomes large, making the production cost of the cap extremely high.Also, when changing the fineness distribution of the island fiber, It was necessary to have a separate polymer metering plate, which was expensive. In addition, a large number of tubular bodies are planted in the sea component channel constructed between the two upper and lower cap plates, and the group of tubular bodies that constitute one sea-island type fiber is composed of tubular bodies with the same outer diameter. As a result, it was difficult to introduce sea components into the center of each group, which caused abnormalities in the cross-section of the fibers, leading to yarn breakage and other operational defects.

C. Purpose of the present invention The purpose of the present invention is to provide an island-in-the-sea type composite fiber die that improves the drawbacks of the prior art described above.

D. Structure of the present invention In a sea-island type composite fiber spinneret consisting of two or more die plates and a plurality of tubular body groups serving as flow paths for island components, the inner diameter of the tubular body located on the outer peripheral side of the tubular body group and This is an island-in-the-sea type composite fiber cap characterized in that its outer diameter is smaller than the inner and outer diameters of the tubular body located on the inner side.

The present invention will be explained in detail below using drawings.
It goes without saying that the present invention is not limited to the following embodiments.

FIG. 1 is a sectional view of a conventionally used die for sea-island composite fibers. In FIG. 1, the island component A is discharged from the metering hole 6 through the introduction hole 5 provided in the No. 1 plate 1, and flows into the inside of the tubular body 7 implanted in the No. 2 plate 2. On the other hand, the sea component B is completely separated from the island component A by the packing grooves 14 and 14' provided in an annular shape. The water is guided through the introduction hole 15 into the ocean current path 8 formed between the No. 2 plate 2 and the No. 3 plate 3. Next, the tubular body 7 is weighed through the slit 9 formed between the tubular body 7 and the No. 3 plate 3.
One core-sheath type composite flow is formed in the flow path 10, surrounding the island component A flowing out from inside the flow path 10. The composite flow flows through the collecting section 11 provided on the No. 4 plate 4.
The discharge hole 12 collects a large number of core-sheath type composite flows guided from other channels formed in a similar manner.
A single sea-island composite fiber is formed. Here, 13 is an annular ring provided in the space between the second plate 2 and the third plate 3. As described above, by uniformly arranging the tubular bodies of the sea component introduction holes and the island component introduction holes, the sea-island type composite fiber die is constructed.
In such conventional caps, the island component A is measured through a measuring hole 6 provided in the No. 1 plate 1, and then introduced into a tubular body having an equal inner diameter and an outer diameter.
There are drawbacks such as the need for a large number of caps (measuring plates) and high production costs.

FIG. 2 is a sectional view taken along the line X-Y in FIG. 1. Second
In the figure, the sea component is introduced from the outer periphery toward the center of the group of tubular bodies forming one sea-island composite fiber, as shown by the arrow, so in a cap using tubular bodies with equal inner and outer diameters, Since the distance between the tubular bodies, for example 16, becomes narrow, it is difficult to introduce the fiber into the center of the tubular bodies, which causes an abnormality in the shape of the sea-island composite fiber and causes operational disadvantages such as yarn breakage.

In order to eliminate these drawbacks, a tubular body with a small inner diameter and an outer diameter may be arranged on the outer peripheral side of a group of tubular bodies for forming island components of one sea-island composite fiber. At this time, it is preferable to change the inner diameter of the tubular body without measuring the conventional island component A using the metering hole 6 provided in the No. 1 plate 1 to provide a difference in metering function of the polymer.

FIG. 3 is a sectional view of the sea-island type composite fiber base according to the present invention, and FIG. 4 is a sectional view taken along the line X-Y in FIG. 3. The same reference numerals as in FIGS. shows.

In FIG. 3, the island component A is introduced into tubular bodies 7 and 7' having different inner diameters, which are installed in the No. 2 plate 2, and after being metered, is discharged from the discharge hole 17. On the other hand, the sea component B is an annular packing groove 14,1.
It is completely separated from the island component A by the packing of No. 4', and is formed between No. 2 plate 2 and No. 3 plate 3 through an introduction hole 15 that is circumferentially bored on the outer periphery of No. 2 plate 2. It is guided to the ocean current channel 8. Then tubular bodies 7 and 3
A single core-sheath type composite flow is formed in the channel 10 by surrounding the island component A that is metered by the slit 9 formed in the pocket with the number plate 3 and flows out from the discharge hole 17. The composite flow is guided to a gathering part 11 provided on the No. 4 plate 4, and a large number of core-sheath type composite flows guided from other channels formed in the same manner are collected and discharged from the discharge hole 12. A single sea-island composite fiber is formed. Here, 13 is an annular ring provided in the space between the second plate 2 and the third plate 3.

As shown in FIG. 4, the inner diameter and outer diameter of the tubular body 7' located on the outer peripheral side of the tubular body group forming the sea-island composite flow are smaller than the inner diameter and outer diameter of the tubular body 7 located on the inner side, respectively. Therefore, the mutual spacing 16' between the tubular bodies located on the outer circumferential side becomes large,
The sea component is easily introduced to the center of the tubular body, and a stable sea-island type composite flow is formed. In addition, since the outer periphery of the sea-island composite flow discharged from the discharge hole 12 is composed of island components that are thinner than the center, yarn bending of the composite flow discharged from the discharge hole 12 is eliminated, and there is no spun yarn breakage. It becomes possible to obtain stable operability.

In addition, in the present invention, since the island component is measured by changing the inner diameter of the tubular body 7, even when changing the island fineness distribution, it can be freely changed by replacing the tubular body, which has many advantages.

E. Effects of the present invention Since the present invention is constructed as described above, the mutual spacing between the tubular bodies located on the outer periphery side is large, and the sea component is easily introduced to the center of the tubular bodies, and the sea component is stabilized. A sea-island type complex flow is formed.
In addition, since the outer periphery of the sea-island composite flow discharged from the discharge hole is composed of island components that are thinner than the center, the yarn bending of the composite flow discharged from the discharge hole is reduced, resulting in stable spun yarn without breakage. It is possible to obtain high operability.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventionally used sea-island type composite fiber die, Fig. 2 is a sectional view taken along the line X-Y of Fig. 1, Fig. 3 is a schematic sectional view according to the present invention, and Fig. 4 is FIG. 4 is a sectional view taken along the line X-Y in FIG. 3; 1, 2, 3, 4: base plate, 5, 15: introduction hole,
6, 12, 17: discharge hole, 7: tubular body, 8: sea flow path, 9: slit, 10: flow path, 11: gathering part,
13: Annular ring, 14, 14': Packing groove, 16: Distance between tubular bodies.

Claims (1)

[Scope of utility model registration request] In an island-in-the-sea type composite fiber cap consisting of two or more cap plates and a plurality of tubular body groups serving as flow paths for island components, the inner diameter and outer diameter of the tubular body located on the outer peripheral side of the tubular body group are inward. An island-in-the-sea type composite fiber cap characterized in that the inner and outer diameters are smaller than the inner and outer diameters of the tubular body located on the side.