JPS63105106A - Spinneret for hollow fiber spinning - Google Patents

Abstract

PURPOSE:To provide the titled spinneret capable of spinning hollow fiber free of core deviation, by fitting a special chuck between the delivery pipe for feeding a liquid or gas into the core portion and delivery hole for feeding the skin portion with a skin-forming material. CONSTITUTION:The objective spinneret is constructed with an upper nozzle 6, a lower nozzle 3 and a flexible chuck 8. For the upper nozzle 6, a number of spinning solution feed holes 5 are performed circumferentially, at the center being set a delivery pipe 4 for feeding the core portion with a liquid or gas. The lower nozzle 3 is superposed beneath the upper nozzle 6, being provided with spinning solution charge hole 1 and funnellike spinning solution delivery hole 2 following the hole 1 downward. The flexible chuck 8 is fitted between the delivery pipe 4 and the funnellike delivery hole 2 of truncated conical shape and the outer peripheral surface provided with front-closed channels 9 and slit spinning solution passages 10 alterately, whereas the inner peripheral surface with spinning solution passage 11.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to improvements in hollow fiber spinnerets.

(Prior Art) Conventionally, in order to spin hollow fibers, as shown in FIG. A discharge pipe 4 for the core liquid or core gas is inserted and held through an upper nozzle 6 around which a spinning solution supply hole 5 is bored, and the discharge pipe 4 is passed through the funnel-shaped spinning solution discharge hole 2. A hollow fiber spinning die 7 is used.

That is, the spinning solution is supplied to the spinning solution introduction hole 1 of the lower nozzle 3 through the spinning solution supply hole 5 of the upper nozzle 6, and a hollow fiber is spun from the spinning solution discharge hole 2, while the core liquid or core gas is supplied to the upper nozzle 6.
The hollow fibers are discharged from the discharge pipe 4 held at the hollow fibers to maintain the hollow shape of the hollow fibers.

(Problems to be Solved by the Invention) However, in the hollow fiber spinning die 7, the upper nozzle 6 and the lower nozzle 3 are made separately and these are polymerized. The core liquid or core gas discharge pipe 4 and the spinning solution discharge hole 2 do not align with each other.
When a hollow fiber is spun using this hollow fiber spinning nozzle 7, there is a problem in that the centers of the inner and outer circumferential circles of the hollow fiber are biased and the wall thickness changes in the circumferential direction, resulting in a so-called misaligned hollow fiber. Ta.

(Object of the Invention) The present invention has been made to solve the above-mentioned problems, and aims to provide a hollow fiber spinneret that can spin hollow fibers without core misalignment.

(Means for Solving the Problems) In order to solve the above problems, the hollow fiber spinning nozzle of the present invention has an inner circumferential wall of the funnel-shaped spinning solution discharge hole of the lower nozzle and a core liquid or core gas of the upper nozzle. A flexible chuck, which has a truncated conical shape and has alternating radially stopping grooves and slit-like spinning solution passages on its outer circumferential surface and radial spinning solution passages on its inner circumferential surface, is fitted between the discharge pipe and the chuck. It is characterized by the fact that

(Function) The hollow fiber spinning die of the present invention has a flexible chuck fitted between the inner circumferential wall of the spinning solution discharge hole and the discharge pipe as described above, so that the discharge pipe of the upper nozzle is automatically moved by this flexible chuck. The core is aligned and fixed, and the spinning solution discharge hole and the core match. Therefore, when hollow fibers are spun using this hollow fiber spinning nozzle, the centers of the inner circumferential circle and outer circumferential circle of the hollow fibers coincide with each other, and a hollow fiber having a uniform wall thickness in the circumferential direction and no center deviation can be obtained.

(Example) An example of the hollow fiber spinning die of the present invention will be described with reference to FIG. 1121 and FIG. In FIG. 1, the same reference numerals as those in FIG. 3 indicate the same parts, so the explanation thereof will be omitted. 8 is a flexible tilt chuck fitted between the inner peripheral wall of the funnel-shaped spinning solution discharge hole 2 of the lower nozzle 3 and the core liquid or core gas discharge pipe 4 of the upper nozzle 6; As shown in FIG. 2, it has a truncated conical shape, and has radially stopped grooves 9 and slit-shaped spinning solution passages 10 alternately radially on the outer circumferential surface, and radially slit-shaped spinning solution passages 11 on the inner circumferential surface.
have.

When a spinning solution is supplied to the spinning solution introduction hole 1 of the lower nozzle 3 through the spinning solution supply hole 5 of the upper nozzle 6 in order to spin a hollow fiber using the hollow fiber spinning nozzle 7' of the present invention configured as described above, The spinning solution is discharged through the slit-shaped spinning solution passages 10 and 11 on the outer and inner circumferential surfaces of the flexible chuck 8 between the inner peripheral wall of the spinning solution discharge hole 2 and the discharge pipe 4 of the upper nozzle 6. A hollow fiber is discharged from the tip of the hole 2. - The core liquid or core gas is discharged from the discharge pipe 4 held in the sumo wrestler nozzle 6 to maintain the hollow shape of the hollow fiber.

The hollow fiber spun in this way has its core aligned with the spinning solution discharge hole 2 of the lower nozzle 3 by the flexible chuck 8 of the discharge pipe 4 held by the upper nozzle 6.
The centers of the inner circumferential circle and the outer circumferential circle coincide, and the wall thickness is uniform in the circumferential direction and there is no misalignment.

(Effect of the invention) As can be seen from the above explanation, the hollow fiber spinning die of the present invention has
Since the core of the spinning solution discharge hole matches the core of the core liquid or core gas discharge pipe, it is possible to spin a hollow fiber with high dimensional accuracy and uniform wall thickness in the circumferential direction without center deviation. .

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of the main part of the hollow fiber spinneret of the present invention, and FIG.
The figure is a perspective view of a flexible chuck in the hollow fiber spinning nozzle, FIG. 3 is a vertical sectional view of the main part of the conventional hollow fiber spinning nozzle, and FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 3. It is a diagram. Applicant Tanaka Kikinzoku Kogyo Co., Ltd. Fig. 1 Fig. 2 Fig. 5... Gikari Kou 10, 11... Xu Wanji λ
Route Figure 3 Figure 4

Claims (1)

[Claims] A discharge pipe for the core liquid or core gas is inserted and held through the lower nozzle, which has a spinning solution introduction hole and a funnel-shaped spinning solution discharge hole following this, and a spinning solution supply hole is bored around it. In a hollow fiber spinning spinneret formed by polymerizing a nozzle and penetrating a discharge pipe into a funnel-shaped spinning solution discharge hole, a truncated conical shape is provided between the discharge pipe and the funnel-shaped spinning solution discharge hole. What is claimed is: 1. A spinneret for hollow fiber spinning, characterized in that a flexible chuck is fitted on the outer circumferential surface of which alternately has stopper grooves and slit-like spinning liquid passages, and has a radial spinning liquid passage on the inner circumferential surface thereof.