KR930005093B1 - Method of high speed spinning of polyester fiber - Google Patents

Abstract

oiling primarily in the amount of 55-70 % against the total oiling amount at the first oiling apparatus placed at 950-1,500 mm from the spinneret; oiling secondarily in the amount of 30-45 % against the total oiling amount at the second oiling apparatus placed at 4,000-5,000 mm from the spinneret; air-interlacing-primarily at the air-pressure of 20-40 % against the total feeding air-pressure at the first air- interlacing apparatus placed at 4,200-5,200 mm from the spinneret; passing via winding roller (7); and air-interlacing secondarily at the air-pressure of 60-80 % against the total feeding air-pressure.

Description

Fast spinning method of polyester fiber

1 is a process schematic diagram illustrating the high speed spinning method of the present invention.

* Explanation of symbols for main parts of the drawings

1: spinneret 3: cooling device

4: 1st stage emulsion applying device 5: 2nd stage emulsion applying device

6: 1st stage air entanglement device 7: draw roller

8: 2 stage air entanglement device 9: Winding machine

The present invention relates to a high-speed method of polyester synthetic fibers, in particular, at the ultra-high speed of more than 6,000m / min, the appropriate emulsion and air entanglement in one and two stages of treatment by minimizing the scattering of the emulsion, and the stability The present invention relates to a high-speed spinning method of polyester fibers for obtaining a synthetic analogous tank having improved stable passability for higher order processing.

Background Art Conventionally, a method of giving the concentration of yarns once again by applying an air entanglement treatment to yarns before imparting concentration and winding to impregnate them for high-speed spinning at a speed of 3,000 m / min or more is known. For example, in Japanese Patent Application Laid-Open Nos. 56-140 and 116, or Japanese Patent Application Laid-Open Nos. 54-125 and 721, after emulsifying the discharge thread, the air passes through the Godet roller, and air treatment is performed between the final Godet roller and the winding device. Japanese Laid-Open Patent Application No. 57-27, 821 discloses a method of imparting an emulsion to the discharge thread, performing an air treatment, and then performing another air treatment between the final Godet roller and the winding device. It has been disclosed.

However, all of the above known methods are disadvantageous in that they do not satisfy both the stability of the yarn and the stable passability for the higher-order processing process. That is, oil or water is scattered when passing through the spinning detent and the first Godet roller without the emulsion, so that the amount of oil attached to the final wound part is decreased and the goddette is affected by the scattering agent. The thread is wound around the roller, resulting in poor operation. In addition, in the case of air entanglement of the insufficient oil treatment, it is difficult to maintain the oil and moisture of the final winding company properly. Therefore, in order to maintain the oil and moisture adhesion amount at a constant level, the amount of the oil agent is applied to the actual requirement. In this case, the amount of oil and water scattering during processing of the yarn or during air treatment is high.

Thus, the high-speed spinning method according to the conventional method is not applicable to ultra-fast spinning because it does not satisfy the manufacturing operation and high order operation.

The present invention has the purpose of reducing the uniformity and trimming of the yarn by minimizing emulsion scattering by improving the productivity and cost reduction effect by increasing the spinning speed 6,000m / min or more at high speeds. That is, in the present invention, in the high-speed melt spinning with a spinning speed of 6,000 m / min or more, the first stage emulsifying device is installed within a range of 950-1,500 mm from the spinneret and gives 55-70% of the total oil supply, and the second stage. The emulsion donor is installed within the range of 4,000 ~ 5,000mm from the spinneret, giving 30 ~ 45% of the total oil supply, and the first stage air entanglement is 4,200 ~ from the spinneret 100 ~ 200mm directly under the second stage emulsion donor. Achievement by high-speed spinning method characterized by processing 20-40% of total input air pressure in the range of 5,200mm, passing through take-off roller, and processing 60-80% of total input air pressure in the second stage air entrainer. It is. Since the conventional general emulsion applying device is installed in one stage under the heating table, the melt passes through the spinneret, splits into several filaments, and passes through the entrance of the heating table as it is, so the outermost filament of the filament The monofilament directly touches and causes thread trimming due to grazing, and the accompanying airflow of the yarn is generated by the high speed, and the shaking of the yarn occurs due to the accompanying airflow, and the slope becomes unstable, making it difficult to obtain a uniform yarn.

In addition, due to the shaking of the filament, constant and accurate temperature transmission by the fruit is impossible in the heating table, frequent trimming occurs, the filament is fused in the heating table to form carbides, and the carbide is joined to the filament that travels to cause the cutting. Was found.

In addition, since the oil is given immediately before the take-off roller, the excess oil is scattered by the centrifugal force of the yarn due to the roller circumferential rotation as the go-through roller rotates at high speed before the oil penetrates into the filament to some extent. Such emulsion scattering inhibits the smooth flow of the filament and deteriorates the environment of the work room, resulting in poor operation.

In order to eliminate this problem, the present inventors impart a one-step emulsion before passing through the reheat zone after cooling and solidifying the polyester polymer discharged through the spinneret at a high speed of 6,000 m / min or higher at a temperature below the thermal transition temperature. By passing through the device to improve the focusing force of the yarn, and then through the heating zone, the two-step emulsion treatment and the first stage air entanglement treatment at the same time, the emulsion easily penetrates into the fiber, minimizing the accompanying air flow of the filament by ultra-fast spinning It minimizes the temperature change in the filament and prevents the fiber from being damaged by heat.

After the first stage of tanning, the oil is slightly scattered when passing through the heating table, but after passing through the heating zone, the tanning process is performed again to obtain the optimum oil pick-up and at the same time, to minimize the scattering of the emulsion as a result of the first stage air entrainment. The present invention is completed by improving the operational problems by preventing the improvement of productivity and the deterioration of the working environment due to the improvement of quality due to emulsion uniformity of the filament and the prevention of trimming. In addition, there are various advantages such as winding tension, uniform adhesion of the oil, pick-up control of the oil, emulsion control, and ease of operation, depending on the position of the emulsion applying device.

Generally, the method of installing the emulsion directly under the cooling table is good when the winding tension is difficult to control, but when the filament passes through the emulsion applying device and passes through the heating table, the oil is vaporized by the high temperature, making it difficult to attach the emulsion into the filament. When the emulsion applying device is installed on the upper part of the take-off roller, there is an advantage of simplicity of operation, but if the spinning speed is progressed at a high speed, the emulsion contained in the filament is scattered by the centrifugal force of the take-off roller before the excess oil penetrates into the filament.

Therefore, in order to prevent these problems as much as possible, the above two methods can be adopted at the same time to install the first stage emulsion applying device at 950 ~ 1,500mm under detention and the second stage emulsion applying device at 4,000 ~ 5,000mm directly under detention. As a result, when air entanglement device was installed 100 ~ 200mm directly below and radiated, when the existing emulsion applying device was directly cooled or located above the take-off roller, the diffusion ratio of emulsion was about 40 ~ 50%, but the first and second stage emulsion giving devices And about 15% when using the first and second stage air entanglements.

As the effect of the present invention, the amount of emulsion used in the production is reduced as the emulsion scattering is reduced, so that cost saving effect and instantaneous thread trimming due to the emulsion scattering are eliminated. Appears, improving the working environment by scattering.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, Figure 1 is a schematic diagram illustrating the present invention a high-speed spinning method, the polyester filament (2) melt-spun in the spinneret (1) is cooled and solidified in the cooling device (3) After being passed through the first stage emulsion imparting device (4) is introduced into the heating table. The polyester filament (2) heated and stretched in the heating table is provided with the emulsion in the two-step oil imparting device (5), passes through the first-stage air interlock device (6), and then passes through the take-out roller (7). It is wound by the winder 9 through 8).

Example 1

The melt spinning of 36 polyester fibers with 75 denier filament number of spinning at 295 ° C. was carried out under the conditions indicated in Table 1, and was entangled with emulsion and air. The spinning speed was wound up at 6,000 m / min.

TABLE 1

Lubrication Level 1 and 2 Lubrication Unit: cc / min

Pneumatic Unit: kg / cm ²

○: Excellent ▲: Normal ×: Poor

Example 2

When melt spinning the polyester fiber with fineness of 75 denier at spinning temperature of 295 ℃ through 36 holes with spinneret diameter of 0.3mm, an emulsion imparting device and an air interlocking device are installed as shown in Table 2 and spinning speed is 6,500m. Wind up at / min.

TABLE 2

○: Excellent ▲: Normal ×: Poor

Claims (3)

In the high-speed melt spinning of synthetic fibers, the first stage emulsifier is in the range of 950-1,500 mm from the spinneret, and the second stage emulsifier is carried out in two stages within the range of 4,000 to 5,000 mm from the spinneret. Polyester fiber characterized in that the step air entanglement device is installed within the range of 4,200 to 5,200 mm from the spinneret, and the oil lubrication treatment and the air entanglement process are performed step by step, followed by the take-out roller 7, and then the second step air entanglement treatment. High speed spinning method. The polyester oil supply system according to claim 1, wherein the oil supply amount of the emulsion applying device is 55 to 70% of the total oil supply amount in the first stage oil addition device and 30 to 45% of the total oil supply amount in the second stage oil addition device. Fast spinning method of the fiber. The high speed of the polyester fiber according to claim 1, wherein the air pressure of the air entanglement device is 20 to 40% of the total input air pressure in the first stage air entanglement device, and 60 to 80% of the total input air pressure in the second stage air entanglement device. Spinning method.