JPS6375106A - Spinneret for conjugate spinning - Google Patents

Abstract

PURPOSE:To stabilize the arrangement of an island component in the obtained island-in-sea type conjugate fibers, by providing passage holes communicating a distribution chamber on a conjugate plate for forming a primary core-sheath conjugate steam with a gathering chamber for forming the secondary core-sheath conjugate stream under the conjugate plate. CONSTITUTION:A distribution chamber 21 is provided between an upper plate 10 having respective inlet holes 11 and 12 for two kinds of polymers (A) and (B) and a conjugate plate 30 and the inlet holes 12 for the polymer (B) to be a sheath are communicated with the distribution chamber 21. Inlet holes 13 are provided in the upper plate 10 and pipes 14 are erected in the conjugate plate 30 or the pipes 14 are hung down from the upper plate 10 and inlet holes 33 are provided in the conjugate plate 30 to form a primary core-sheath conjugate stream, which is then made to flow in a gathering chamber 41 provided in the lower plate 40 under the conjugate plate 30 to form the secondary conjugate stream. The streams are then extruded through each discharge hole 42 below the gathering chamber 41. In the process, passage holes 32 for communicating the distribution chamber 21 with the gathering chamber 41 are provided in the conjugate plate 30.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a composite spinneret that stabilizes the arrangement of island components in a spun yarn whose cross section is seabird-shaped. .

[Prior Art] Conventionally, various composite spinnerets have been proposed for producing so-called sea-island type composite fibers in which two or more yarn components are distributed in one component or another component.

For example, the composite spinneret shown in FIG. 21 is a typical example of a known sea-island type composite spinneret, in which the flow of two components is passed through the first composite process (introduction holes 13 and pipes 14 drilled in FIG. 21). A core-sheath composite flow is formed, and then in a 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. In addition, the composite spinneret shown in Fig. 22 is
This is the mouthpiece described in the publication, and is intended to improve the stability of the arrangement of the island components by reducing disturbances in the composite flow such as bonding of the island components and distortion of the island shape. A protruding rectifying guide 50 is provided in the composite flow gathering chamber 41 shown.

[Problems to be Solved by the Invention] However, such a conventional composite spinneret has a problem in that the arrangement of the island components in the sea component is not stable. There were problems such as gathering together.

[Means for solving problems] This invention comprises at least two component polymers (A.

B) the upper plate (10) having the inflow holes (11, 12),
The composite plate (30) constitutes a distribution chamber (21) that communicates with the inflow hole (12) for the component to become a sheath of the two components, and the introduction hole ( 13) and a pipe (14) erected on the composite plate (30), or a pipe (14) suspended on the upper plate (10) and the composite plate (3).
A primary core-sheath composite flow is formed with the introduction hole (33) drilled in the composite plate (3O).
The composite spinneret flows into the composite flow gathering chamber (41>) provided in the lower plate (40) located below ) to form a secondary core-sheath composite flow, and is spun from the spinning discharge hole (42). The composite spinneret is characterized in that the composite plate (30) is provided with a passage hole (32) through which the distribution chamber (21) and the composite flow collection chamber (4) communicate with each other.

A more detailed explanation will be given below with reference to the drawings.

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

In FIGS. 1 and 2, polymer A is introduced through the polymer A inflow hole 11 and flows into the tube 14 through the introduction hole 13. In FIG. At this time, the polymer B introduced from the polymer B inflow hole 12 passes through the distribution chamber 21 and reaches the introduction hole 13, where it forms a primary core-sheath composite flow with the polymer A as the core, The core-sheath composite flow flows into the composite flow gathering chamber 41 from the lower end of the tube 14 through the pipe 14 in a group form.

On the other hand, the polymer B in the distribution chamber 21 passes through the passage hole 32 bored in the composite plate 30, which is a partition wall between the distribution chamber 21 and the composite flow gathering chamber 41, and the polymer B passes through the passage hole 32 formed in the composite plate 30, which is a partition wall between the distribution chamber 21 and the composite flow collection chamber 41, and the composite flow does not form a core-sheath composite flow. The flow flows into the flow collection chamber 41. Here, the polymer B flowing from the passage hole 32 fills around the sheath component of the plurality of core-sheath composite flows flowing from the pipe 14.

By the way, this filling component and the sheath component of the above-mentioned first-order composite flow are:
Since both are polymer B, in the composite flow collection chamber 41, a structure is formed in which core components of polymer A are scattered in polymer B, that is, a so-called seabird structure in which polymer B is a sea component and polymer A is an island component. A secondary composite stream is formed, which is spun out from the spinning discharge hole 42 as a sea-island composite fiber.

Also, in FIGS. 3 and 4, the only difference is the method of forming the primary composite flow; the core-sheath composite flow is filled with polymer B in the composite flow collecting chamber 41 to form a secondary composite flow, and the spinning The seabird composite fiber is spun out from the discharge hole 42.

Next, from FIG. 7 to FIG. 18, the composite plate 30 is
FIG. 3 is a cross-sectional view showing an example of the arrangement of the pipe 14, the passage hole 32, and the introduction hole 33. In particular, FIGS. 7 and 8 show cross-sectional views of a base for arranging the core component at the center in the thread cross section, and FIGS. 9 and 10 for arranging the island components at the outer periphery. In addition, FIGS. 11 to 18 show cross-sectional views of the cap in which the arrangement of the island components is variously changed.

In the base of the present invention configured as described above, the tube 1
4 and sea component passage holes 32 are arranged as shown in FIGS. 7 to 10, and a core-sheath component polymer flow path (introduction hole 13 and pipe 14) that forms a core-sheath composite flow and reaches the collection chamber 41. By appropriately designing the flow path resistance of the flow path and the flow path resistance of the flow path (through hole 32) through which the sea component polymer B is individually introduced into the gathering chamber 41, a core-sheath composite flow is formed and the sea component polymer B is introduced into the gathering chamber 41. The supply ratios of the core-sheath component polymer supplied to the core-sheath component polymer B and the sea component polymer B supplied separately to the collection chamber are arbitrarily adjusted.

Furthermore, by appropriately combining the arrangement of the pipe 14 and the sea component passage hole 32 and adjusting the flow path resistance of these two flow paths, the cross section of the mouthpiece illustrated in the figures from FIG. 11 to FIG. 18 can be obtained. It also becomes possible to easily spin core-sheath type composite fibers 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 gathering chamber 41, and flows into the space between 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 ultimately prevented from shifting, and the arrangement of the island component in the sea component as a composite fiber is stabilized.

As explained above, the present invention can be applied as a die for producing all types of conjugate fibers such as eccentric core-sheath conjugate fibers and bimetallic conjugate fibers, since the island components can be arranged at arbitrary positions.

[Example 1 (Example 1) When polyethylene terephthalate was used as the island component polymer and nylon was used as the sea component polymer, the yarn was spun using the spindle shown in Figure 8. Three islands were formed near the center as shown in Figure 19. Core-sheath composite ratio of collected fibers is 20/80 to 80/20%
It was possible to obtain stable results over a period of time.

(Example 2) When polyethylene terephthalate was used as the island component polymer and nylon was used as the sea component polymer, the fiber was spun using the spinneret shown in FIG. Core/sheath composite ratio 20/80~80/20
%.

[Effects of the Invention] As described above in detail), the present invention provides passage holes 3 in the composite plate 30.
2 provides an excellent effect of stabilizing the arrangement of the island components in the sea-island composite fiber.

[Brief explanation of the drawing]

1 to 4 are longitudinal cross-sectional views showing one embodiment of a composite spinneret according to the present invention, and FIGS. 5 and 6 are longitudinal cross-sectional views of a composite spinneret showing an embodiment of the present invention. , the figures from FIG. 7 to FIG. 10 are cross-sectional views taken along the arrow 2-7, corresponding to the figures from FIG. 1 to FIG. 4, respectively, and the figures from FIG. 11 to FIG. 18 are A cross-sectional view of a composite spinneret showing the Hakunomi ts mode, and furthermore, FIGS. FIG. 3 is a cross-sectional view of a spun yarn. FIGS. 21 and 22 are diagrams showing representative examples of known die for manufacturing core-sheath composite fibers. Brief description of the drawings 10...Upper flat panel 11...Polymer A inflow hole 12...Polymer B inflow hole 13.33...Introduction hole 14 ...Pipe 21 ... Distribution chamber 30 ... Composite plate 32 ... Passing hole 40 ... Lower plate 41 ... Composite flow gathering chamber 42... Spinning discharge hole 50... Rectification guide A... Island component polymer B... Sea component polymer

Claims (1)

[Claims] At least two component polymers (A, B) inflow holes (11
.
The upper plate (10) constitutes a distribution chamber (21) communicating with the upper plate (10).
an introduction hole (13) bored in the composite plate (30) and a pipe (14) erected on the composite plate (30), or a pipe (14) suspended on the upper plate (10) and the composite plate (30). A primary core-sheath composite flow is formed with the introduction hole (33) drilled in, and further,
The first core-sheath composite flow flows into a composite flow collection chamber (41) provided in a lower plate (40) located below the composite plate (30) to form a second core-sheath composite flow, In the composite spinneret for spinning from the spinning discharge hole (42), the composite plate (30
) is provided with a passage hole (32) through which the distribution chamber (21) and the composite flow collection chamber (41) communicate with each other.