JPH0756083B2 - Compound spinneret - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a composite spinneret in which the arrangement of the island components in a yarn in which the cross section of the spun yarn is sea-island type is stabilized. .

[Prior Art] Conventionally, various composite spinnerets for producing so-called sea-island type composite fibers in which the yarn component is composed of two components and one component is distributed in a plurality of other components have been proposed.

For example, the composite spinneret shown in Fig. 21 is a typical example of a known sea-island type composite spinneret, and the flow of two components is cored in the first composite process (introduction hole 13, pipe 14 in Fig. 21). In the second composite process (composite flow collecting chamber 41 in FIG. 21), the core-sheath composite flow is collected and spun from the spinning discharge hole 42. Further, the composite spinneret shown in FIG. 22 is a spinneret described in Japanese Patent Publication No. 56-52122, which reduces the disturbance of the composite flow such as the joining of island components and the distortion of the island shape, and the arrangement of island components This is intended to improve the stability, and for that purpose, a projecting flow straightening guide 50 is provided in the composite flow collecting chamber 41 shown in FIG.

[Problems to be Solved by the Invention] However, in such a conventional composite spinneret, there is a problem that the arrangement of island components in the sea component is not stable, for example, the island components in the sea component are hard on the outer peripheral portion or in the central portion. There were problems such as gathering.

The present invention has been made in view of the above problems, and spins a composite fiber composed of two core-sheath components having excellent quality in which the island component in the sea component is not hardened in the outer peripheral portion or collected in the central portion. The object is to provide a composite spinneret which can be drawn.

[Means for Solving the Problems] In the composite spinneret according to the present invention, the upper plate (10) having the inflow holes (11, 12) of at least two components of the core-sheath polymer (A, B) is provided. The composite plate (30) constitutes a distribution chamber (21) communicating with the inflow hole (12) of the component (B) of the two components, which is to be the sheath, and is formed in the upper plate (10). The introduction hole (13) and the pipe (14) erected on the composite plate (30) or the pipe (14) suspended on the upper plate (10) and the composite plate (30) are drilled. A primary core-sheath composite flow is formed with the introduction hole (33), and the primary core-sheath composite flow is further combined with the composite plate (30).
In the composite spinneret in which the secondary core-sheath composite flow is formed by flowing into the composite flow collecting chamber (41) provided in the lower plate (40) located below the A passage hole (32) communicating with the distribution chamber (21) and the composite flow collecting chamber (41) in the composite plate (30), the pipe (14)
Alternatively, it is characterized in that it is provided independently of the introduction hole (33).

Hereinafter, it will be described in more detail with reference to the drawings.

1 to 4 are longitudinal sectional views showing one embodiment of the composite spinneret according to the present invention, and FIGS. 5 and 6 are longitudinal sectional views of the composite spinneret showing other embodiments. FIG. 7 to FIG. 10 are transverse cross-sectional views taken along the line ZZ corresponding to the views of FIG. 1 to FIG. 4, respectively.

In FIGS. 1 and 2, the polymer A is introduced through the inflow hole 11 of the polymer A and flows into the pipe 14 through the introduction hole 13.
At this time, the polymer B introduced from the inflow hole 12 of the poimer B reaches the introduction hole 13 through the distribution chamber 21, and forms a primary core-sheath composite flow having the polymer A as a core, The core-sheath composite flow flows through the pipe 14 from the lower end of the pipe 14 into the composite flow collecting chamber 41 as a group.

On the other hand, the polymer B in the distribution chamber 21 is compounded without forming a core-sheath composite flow through the distribution chamber 21 and the passage hole 32 formed in the composite plate 30 which is a partition wall of the composite flow collecting chamber 41. It flows into the flow collecting chamber 41. Here, the polymer B flowing in from the passage hole 32 is filled around the sheath component of the plurality of core-sheath composite flows flowing in from the pipe 14.

The filling component and the sheath component of the first composite flow are
Since both are polymers B, a structure in which the core component of the polymer A is scattered in the polymer B in the composite flow collecting chamber 41, that is, a so-called sea-island structure in which the polymer B is a sea component and the polymer A is an island component A secondary composite flow is formed, and this is spun out from the spinning discharge hole 42 as sea-island composite fiber.

Also in FIGS. 3 and 4, only the method of forming the first-order composite flow is different, and the core-sheath composite flow is filled with the polymer B in the composite-flow collecting chamber 41 to form the second-order composite flow. It is spun out as a sea-island composite fiber from the discharge hole 42.

Next, FIGS. 7 to 18 show the pipes in the composite plate 30.
FIG. 14 is a cross-sectional view showing an arrangement example of 14, passage holes 32, and introduction holes 33. In particular, FIGS. 7 and 8 are cross-sectional views of the die for arranging the core component in the central portion and the island component in the outer peripheral portion in the yarn cross section.

In addition, FIGS. 11 to 18 show cross-sectional views of the die when the arrangement of the island components is variously changed.

In the mouthpiece of the present invention constructed in this manner, the pipe 14
And the sea component passage hole 32 is arranged as shown in FIGS. 7 to 10, and further, the core-sheath component polymer flow path (the introduction hole 13 and the pipe 14) which reaches the collecting chamber 41 as a core-sheath composite flow. By appropriately designing the flow path resistance and the flow path resistance of the flow path (passage hole 32) through which the sea component polymer B is independently introduced into the collecting chamber 41,
The respective supply ratios of the core-sheath component polymer that is supplied to the collecting chamber as a core-sheath composite flow and the sea component polymer B that is separately supplied to the collecting chamber are adjusted.

Further, by appropriately combining the arrangements of the pipe 14 and the sea component passage hole 32, and adjusting the flow resistance of the flow passages of these two systems, the cross-section of the die illustrated in FIGS. 11 to 18 is illustrated. It is also possible to easily spin a core-sheath type composite fiber having a cross section corresponding to.

[Operation] The sea component polymer B supplied from the passage hole 32 becomes a filling component that fills the space between the core-sheath composite flow formed in the composite flow collecting chamber 41 and flows into the core-sheath composite flow. Since it is integrated with the sheath component polymer in the core-sheath component polymer, the core component, that is, the island component is finally prevented from being displaced, and the arrangement of the island component in the sea component as the composite fiber is stabilized.

INDUSTRIAL APPLICABILITY As described above, the present invention allows the island components to be arranged at arbitrary positions, and is therefore applicable as a spinneret for producing conjugate fibers in all forms such as eccentric core-sheath conjugate fibers and bimetal type conjugate fibers.

[Example] (Example 1) Polyethylene terephthalate was used as the island component polymer and nylon was used as the sea component polymer, and spinning was performed using a spinneret shown in Fig. 8. As a result, three islands were found near the center as shown in Fig. 19. The collected fibers could be stably obtained over the core-sheath composite ratio of 20/80 to 80/20%.

(Example 2) Polyethylene terephthalate was used as the island component polymer and nylon was used as the sea component polymer, and spinning was performed using a spinneret shown in Fig. 10. As a result, fibers having 12 islands arranged on the outer periphery as shown in Fig. 20 were obtained. The core-sheath composite ratio could be stably obtained over 20/80 to 80/20%.

EFFECTS OF THE INVENTION The present invention has the excellent effect that the arrangement of the island components in the sea-island composite fiber is stabilized because the through holes 32 are provided in the composite plate 30 as described in detail above.

[Brief description of drawings]

1 to 4 are longitudinal sectional views showing an embodiment of a composite spinneret according to the present invention, and FIGS. 5 and 6 are longitudinal sectional views of a composite spinneret showing other embodiments. , FIG. 7 to FIG. 10 are cross-sectional views taken along the line ZZ corresponding to the views of FIG. 1 to FIG. 4, and FIG. 11 to FIG. A cross-sectional view of a composite spinneret showing another embodiment, further, FIGS. 19 and 20 show spinning using the spinneret shown in FIG. 3 (FIG. 8) and FIG. 4 (FIG. 10), respectively. It is a transverse cross-sectional view of the yarn. FIG. 21 and FIG. 22 are diagrams showing typical examples of known spinneret for producing core-sheath composite fiber. DESCRIPTION OF SYMBOLS IN THE DRAWING 10 …… Upper plate 11 …… Polymer A inflow hole 12 …… Polymer B inflow hole 13,33 …… Introduction hole 14 …… Pipe 21 …… Distribution chamber 30 …… Composite plate 32… … Passage hole 40 …… Lower plate 41 …… Complex flow collecting chamber 42 …… Spinning discharge hole 50 …… Rectification guide A …… Island component polymer B …… Sea component polymer

Continuation of the front page (56) Reference JP-A-56-148906 (JP, A) JP-A-54-101913 (JP, A) JP-B 47-5445 (JP, B1) JP-B 57-30165 (JP , B2)

Claims (1)

[Claims] 1. An upper plate (10) having an inflow hole (11, 12) for at least two components of a polymer (A, B) which is a core-sheath component, and a composite plate (30), among the two components. A distribution chamber (21) that communicates with the inflow hole (12) for the component (B) to be the sheath of the above is formed in the introduction hole (13) and the composite plate (30) formed in the upper plate (10). A primary core sheath with an upright pipe (14) or with a pipe (14) suspended on the upper plate (10) and an introduction hole (33) bored in the composite plate (30). Forming a composite flow, and further, the primary core-sheath composite flow flows into the composite flow collecting chamber (41) provided in the lower plate (40) located below the composite plate (30) and the secondary flow In a composite spinneret that forms a core-sheath composite flow and is spun from a spinning discharge hole (42), the distribution chamber (21) and the composite flow collecting chamber (41) communicate with the composite plate (30). Pass the through hole (32) through the pipe (14).
Alternatively, a composite spinneret is provided independently of the introduction hole (33).