KR100198735B1 - Perforated multiple spinneret for mono-filament - Google Patents

Abstract

The present invention relates to a multi-spinning spinneret device for monofilament, which is a spinneret device capable of producing a monofilament with a small diameter deviation with good workability.

In the present invention, the molten polymer inlet, the porous dispensing plate and the primary leisure bore are sequentially arranged, and a monolithic nozzle having two or more discharge holes in the lower portion of the primary leisure bore is arranged in a multi-row linear shape in the spinneret. It is a porous multiple spinneret device for filament.

The present invention is suitable for the production of monofilaments having a fiber diameter of 50 to 200 microns.

Description

Porous multi-layer spinneret for monofilament

1 is a longitudinal cross-sectional view of a conventional spinneret for monofilament.

Figure 2 is a longitudinal cross-sectional view of the multi-spinning spinneret device for fine-grained monofilament of the present invention.

3 is an exemplary view when there is no secondary leisure bore of the small nozzle in the spinneret of the present invention.

3 (a) is a top partial perspective view.

Fig. 3 (b) is a longitudinal sectional view thereof.

4 is an exemplary view in which the small nozzle of the spinneret of the present invention is arranged in a thermally insulated line.

4 (a) is a detailed view of a small nozzle part.

Figure 4 (b) is an illustration of the arrangement of the multi-linear line.

* Explanation of symbols for main parts of the drawings

1: molten polymer spinneret 2: porous distribution plate

3: primary leisure boa 4: normal spinneret

5: small nozzle part 6: radiation discharge hole

7: Second leisure bore by small nozzle C: Center line of small nozzle

The present invention relates to a porous multiple spinneret device used in the manufacture of fine-grained monofilament as a fiber monofilament used for industrial purposes. More specifically, the polyester micro-fine fine-grained microfilament is mainly used for industrial textile materials such as high-quality artificial hair, printing screens, air filtration filters, etc. The present invention relates to a multi-spinning spinneret device arranged in multiple.

In general, when the monofilament is manufactured using a polyester polymer, the fineness of the fiber, that is, the thickness of the fiber perol is about 50 microns or more in diameter, that is, when the fineness is about 30 denier or more, the fineness is too large for spinning. Since cooling and solidification are difficult, it is difficult to manufacture by air-cooling, which is a conventional method for producing polyester fibers.

In addition, when the fiber thickness is 200 microns or less, that is, the fineness is 400 denier or less, the manufacturing method of industrial monofilament is so small that the workability such as elongation and winding is poor or the adjustment thereof is very difficult. Even if this well harmonized good fiber is produced, there is a problem that the production cost is very low due to the low productivity due to the characteristics of the equipment such as low winding speed and limited production harvest.

Therefore, the present inventors have invented the spinneret device of the present invention as a result of intensive studies and experiments on how to improve such a problem and at the same time improve productivity without the fundamental object or modification of the equipment.

In the present invention, in consideration of the cooling solidification behavior of the polyester polymer melt, a series of spinning equipments capable of providing a water cooling process in a cooling water tank installed directly below the extrusion spinning apparatus and subsequently performing heat drawing and heat setting are arranged horizontally. In order to utilize the monofilament manufacturing equipment, it is possible to modify the conventional monofilament spinnerets to improve the poor workability and to improve the uniformity of the fiber and the homogenization of the fiber material. By placing a large number of small nozzles (similar in shape to the shape of the small nozzles disposed in the large spinneret or integrated with the spinneret) in the spinneret device, the total number of filaments of the extruded and spun fiber is increased. The total fineness of the spinning fiber is to be increased.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is an illustration of a conventional spinneret for producing monofilaments.

2 is an exemplary view of the porous multi-spinning device of the present invention, the molten polymer polymer is passed through the inlet (1) through the distribution plate (2) of the porous while the uniform pressure is distributed to the leisure bore (3) do. To the leisure boa (3), the components in the normal spinneret are utilized in consideration of the equalization and the mixing efficiency, and then the molten polymer is introduced into each of the small nozzles (5), and the secondary for the equalization and distribution in the small nozzles (5). After filling the leisure bore 7 is extruded into the discharge hole (6).

At this time, the position and size of the porous small nozzle (5) can be determined in consideration of the number and pore size of the porous discharge hole, but the arrangement of the small nozzle (5) is limited for a continuous series of processes, such as separation winding process after stretching Therefore, spinnerets were manufactured such that the arrangement of the plurality of fiber bundles discharged from each molding nozzle 5 was arranged in a straight line in a direction perpendicular to the process progress direction of the whole yarn strand. In the general spinneret design, the arrangement of the discharge holes 6 is generally known as a multi-concentric circle and a multi-linear arrangement in consideration of an air cooling method and a direction, but the present inventors pay attention to the spinnerets of a multi-row linear arrangement and separate guides. Effective batching solves the problem of separation winding in the post process. The extruded spun fiber enters a water tank with a medium of water installed directly below the spinneret in the form of a tow in which a plurality of fiber bundles are aggregated, and the temperature of the water tank is controlled to be higher than the glass transition temperature of the polyester. Inside the tank, two or more rod-shaped guides are installed to adjust tension, slope and separation. In the subsequent process, it goes through the manufacturing process of general monofilament such as heating, multi-stretching, heat setting, etc., and passes through a plurality of multi-stage separation guides installed on the way, so-called fibers of several fibers corresponding to the discharge labor of each small nozzle (5). The monofilament fibers of different properties and better physical properties are obtained.

When the monofilament spinneret of the present invention is used, not only the spinning and drawing workability is improved when the fine-grained polyester-based monofilament is manufactured, but also the manufacturing productivity is increased several times, and at the same time, the uniformity of the fiber and the homogenization of the fiber are achieved. do.

The final product form obtained in the present invention is a form in which several fine-grained monofilaments are uniformly wound, and such polyester monofilaments are divided into individual monofilaments or reshaped into fiber bundles for the next application process. Since it must be a conventional injection process or rewinding process.

In particular, in the case of artificial hair fibers, the winding process may be omitted after the final heat treatment process according to the form required by the consumer, and may be commercialized in the form of continuous tow.

Hereinafter, the present invention will be described in more detail with reference to Examples.

Brief description of the manufacturing process of monofilaments

The fillet-like polyester polymer for fiber formation obtained by a conventional manufacturing method was crystallized at 100 to 140 ° C. and dried at 100 to 180 ° C. for at least 5 hours, dried to a moisture content of 0.003% or less, and used as a raw material.

Spinning temperature is carried out at 280 to 300 ℃ and in particular two or more static mixers are installed in the polymer inlet line in order to improve the workability of the monofilament of the fineness and the homogeneity of the molten polymer.

The melted bonofilament extruded from the spinneret passes through a cooling water tank maintained at 60 to 90 ° C. to become a sufficiently hardened unstretched fiber, and is then finished in stepwise stretching and heat treatment step by step. Wind up the filament. The winding speed is usually wound at a speed of 120 to 200 meters per minute, and the feed speed of the undrawn monofilament toward the first roller is set in consideration of workability at the level of several tens of meters per minute.

The stretching ratio up to the final stretching is carried out about 4 to 6 and the heat treatment temperature is carried out step by step from 80 ℃ to 200 ℃. The products thus obtained are capable of producing monofilament products having a fineness of 30 to 400 denier and a fiber thickness of 50 to 200 microns in diameter.

[Workability Assessment]

Workability in the spinning and stretching process was evaluated as follows. If it is difficult for the radiating or drawing work itself with the result of working for 10 hours, it is impossible to do it. If the work is interrupted more than once due to severe partial trimming or total trimming, it is 'bad' and partial trimming. However, it was evaluated as 'Normal' for the degree that does not affect the work, and 'Good' if the work continued well without partial trimming.

[Evaluation of Fiber Diameter]

Five monofilament fiber samples were randomly taken by weight, and the thickness of the fibers was measured 19 times or more at intervals of 10 meters or more for each sample using a micrometer, and the average value was taken. The diameter deviation indicates the range of deviation of the measured values with respect to the average value as a percentage, and the product is generally good when the value is less than 2%, and is usually 2 or more and 3 or less, and usually larger than 3 and cannot be used as a product.

Example 1

Spun fine polyester monofilament was spun using a spinneret as illustrated in FIG. As shown in FIG. 4 (b), the spinnerets were arranged with 44 small nozzles arranged in a multi-row, and the discharge nozzles constituting the small nozzles were manufactured with a pore diameter of 0.4 mm and a small number of 10 per nozzle. At this time, the target fineness of the monofilament was 50 microns in fiber diameter and about 30 deniers in the fineness of the monofilament.

Example 2

The radial discharge hole constituting the small nozzle was prepared in the same manner as in Example 1 except that the diameter of each small nozzle was set to 0.6 mm in diameter and 7 in number, and the target fineness was 70 microns in fiber diameter.

Example 3

Spinning discharge hole constituting the small nozzle was carried out in the same manner as in Example 1, with the diameter of 0.8 mm and the number of air 5 per small nozzle, and the target fineness of 200 microns in fiber diameter.

Example 4

As shown in FIG. 3 (b) of FIG. 3, only a plurality of spinning discharge holes were disposed in any small nozzle portion without providing a secondary leisure bore in the small nozzle. The specifications of the spinning discharge hole were 0.6 mm in diameter and 7 in number, and the target fineness was 70 microns in fiber diameter.

Comparative Example 1

Comparison was carried out using a conventional polyester spinner. The spinnerets used were ordinary spinnerets having a pore diameter of 0.5 mm and a number of times 36, and the cooling method was air cooled at 20 ° C. and a wind speed of 1.5 m / sec. There is no additional device, and the winding speed was adjusted by winding at a relatively low speed of 200 to 300 meters in consideration of spinning workability, and the final target fineness was about 50 microns in fiber diameter.

Comparative Example 2

Spinning was carried out using a conventional spinneret for monofilament. Spinnerets were used with a diameter of 0.6 mm and a number of airborne 60, and the target fineness was 200 microns to prepare monofilaments in a conventional manner.

Comparative Example 3

As in Comparative Example 2, but using a spinneret of 0.4mm in diameter, a number of airborne 60, a target fineness of 70 microns was prepared in a conventional manner.

The results of Examples 1 to 4 and Comparative Examples 1 to 3 are shown in Table 1.

Claims (3)

In the molten polymer inlet (1) and the porous distribution plate (2) and the primary leisure bore (3) formed in the lower portion and the small nozzle (5) is arranged in a multi-row linear, the small nozzle (5) Porous multi-spinning spinneret for monofilament, characterized in that it comprises 2 to 10 spinneret (6) inside. 2. The multi-spinning spinneret for monofilaments according to claim 1, wherein the small nozzle (5) has a spinneret and a body. 2. The multi-spinning spinneret for monofilaments according to claim 1, characterized in that a secondary leisure bore (7) communicating with the spinning discharge hole (6) is formed on the top of the spinning discharge hole (6).