JP2570264Y2 - Spinneret for conjugate - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinneret for a conjugate in a melt spinning apparatus for thermoplastic synthetic fibers such as polyamide and polyester.

[0002]

2. Description of the Related Art Generally, to obtain a conjugate fiber by bonding a thermoplastic polymer such as polyamide or polyester, JP-A-48-11417 and JP-A-52-7
As described in Japanese Patent No. 4011 and the like, a discharge hole provided with a perforated second spinning solution introduction hole or communication hole so as to join at a certain angle with respect to a vertical introduction hole for the first spinning solution. Spinnerets with holes have been used.

In such a spinneret, in order to achieve uniform distribution, the spinning solution is supplied to the communication hole of the second spinning solution by connecting an introduction hole to an annular flow path formed on the upper surface of the spinneret. I have.

[0004]

However, when the discharge holes are arranged in a plurality of rows, especially four or more rows, it is difficult to evenly distribute and supply the same amount of polymer to each communication hole.
There was a problem that distribution unevenness easily occurred.

The present invention solves such a conventional problem,
It is an object of the present invention to provide a conjugate spinneret capable of producing a good quality product over a long period of time.

[0006]

That is, the present invention provides a first aspect.
Introducing holes for the spinning solution are arranged in multiple rows around the circumference, and an annular channel for the second spinning solution is provided between the arrays, and the channel merges with the inlet for the first spinning solution. A conjugate spinneret for spinning out two or more kinds of spinning solutions in a composite state, in which a communication hole for a second spinning solution is formed, wherein a nozzle is provided in the communication hole for the second spinning solution. Is a spinneret for a conjugate.

[0007]

The second spinning solution supplied to the nozzle which merges with the first spinning solution introduction hole through the annular flow path receives a predetermined resistance when passing through the throttle hole provided in the nozzle. Since the spinning solution at the upstream of the throttle hole is maintained in a uniform pressure state, the distribution of the second spinning solution to each of the introduction holes is equalized, and a uniform conjugate fiber having no unevenness in discharge is obtained. Further, since the nozzle is inserted into the communication hole, it can be replaced as needed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG.
1A is a plan view of a main part showing an embodiment of the present invention, FIG.
FIG. 2B is an enlarged cross-sectional view taken along the line AA in FIG. 1.

In the figure, reference numeral 1 denotes a main body of a spinneret. The main body 1 has a large number of first spinning solution introduction holes 2 vertically arranged in a staggered arrangement along a concentric circumference. Has a spinning hole 3 serving as a discharge hole.

An annularly engraved second spinning solution flow path 4 is formed between the circumferences in which the introduction holes 2 are arranged, and a predetermined angle is formed between the flow path 4 and the introduction hole 2. Corresponding communication holes 5 are formed, and a joining nozzle 6 for the second spinning solution having a throttle hole 7 at the tip is inserted into these communication holes 5.

Here, the first spinning solution supplied to the introduction hole 2 is discharged from the first spinning solution through the spinning hole 3, and at this time, the second spinning solution supplied to the annular flow path 4 is It is distributed to each joining nozzle 6 via the passage 4 and is supplied to the introduction hole 2 from the throttle hole 7 at the tip thereof and joins with the first spinning solution, and is extruded from the spinning hole 3 in this state to form a conjugate fiber.

In this case, the second spinning solution is moderately throttled in the joining nozzle 6 and the resistance is increased, so that a substantially equal pressure state (formation of an equalizing chamber) from the inside of the nozzle upstream of the throttle hole 7 to the flow path 4 is achieved. Therefore, the second spinning solution supplied to the introduction hole 2 is evenly distributed, and a high-quality conjugate fiber is obtained.

When the arrangement of the introduction holes 2 is, for example, four or more, the outermost circumference and the innermost circumference are 1/1 of those arranged between them.
2, ie, the joining nozzles 6 other than the outermost and innermost positions need to discharge a spinning solution twice as much as the joining nozzles 6 at the outermost and innermost positions. However, if the spinning liquid properties or spinning conditions may cause discharge unevenness between the two, the narrowing hole and length of the joining nozzle at the outermost and innermost positions or the hole diameter of the nozzle itself may be changed to other nozzles. The resistance may be further increased by making it smaller normally.

Although the diameter d of the throttle hole of the joining nozzle depends on the joining condition, the ratio to the main body diameter D of the normal nozzle, d / D is 0.05.
It is preferably set to about 0.2. Further, the joining nozzles can be replaced as needed, for example, according to changes in spinning conditions and the like.

In the above, an example in which a throttle hole is provided at the tip of the nozzle has been described.

[0016]

As described above, according to the present invention, since the spinning solution is evenly distributed, the flow of each introduction hole after the two solutions merge is evenly distributed, and the spinning solution is discharged from the spinning solution stably. Even if the number of holes is increased, a remarkable effect that a product of excellent quality can be favorably manufactured over a long period of time is exhibited.

[Brief description of the drawings]

FIG. 1A is a plan view of a main part showing an embodiment of the present invention. (B) It is an AA cross-sectional enlarged view of FIG. 1 (a).

[Explanation of symbols]

 Reference Signs List 1 base body 2 introduction hole 3 spinning hole 4 flow path 5 communication hole 6 joining nozzle 7 throttle hole

Claims (1)

(57) [Scope of request for utility model registration] 1. An introduction hole for a first spinning solution is circumferentially arranged in multiple rows, an annular channel for a second spinning solution is provided between the arrays, and the first spinning channel is provided in the channel. A conjugate spinneret for spinning out at least two types of spinning liquids in a composite state, in which a communication hole for a second spinning liquid that merges with an introduction hole for a liquid is formed, and a communication hole for the second spinning liquid. A spinneret for a conjugate, wherein a nozzle provided with a throttle portion is inserted therein.