KR100394137B1 - Method of high-speed spinning polyester - Google Patents

Abstract

PURPOSE: Provided is a method of high-speed spinning a polyester yarn which prevents the deterioration of a solvent, and enhances the productivity with uniform tenacity and elongation. CONSTITUTION: With the method of high-speed spinning polyester, a high-speed spun polyester is quenched in a quenching chamber(4) directly placed under a spinneret, and before the oiling treatment, heat-treated by a line heater(11), and cooled by a line quencher(12). The length of the line heater is 1.2-3.0m, and the temperature thereof is 130-180 deg.C. The length of the line quencher is 0.5-2.0m, and the temperature thereof is 15-25 deg.C.

Description

High Speed Spinning Method of Polyester

The present invention relates to the production of polyester yarns by a high-speed spinning method.

In general, high-speed spinning is known as the spinning speed is more than 5,000m per minute.In the process of producing polyester yarn, the first method of producing unstretched yarn and the second process of stretching after spinning and the process of stretching simultaneously with spinning There is this. The method of performing the stretching treatment after the production of the unstretched yarn is low in productivity, but it is mainly used for small quantity production of various kinds due to the differentiation of products. In addition, the method of performing the stretching process at the same time as spinning has the advantage of high price competitiveness due to the low production cost. Therefore, many companies are applying this method now.

The method of performing the stretching process simultaneously with spinning can increase the unit productivity by speeding up the production speed. The developed countries are currently conducting R & D at speeds up to 12,000 m / min, but the commercialized production speeds around the world range from 5,000 to 7,000 m / min. However, it is not possible to increase the speed indefinitely in order to increase the production efficiency, that is, the adverse effect of improving the spinning speed may occur. As a result of deterioration of workability and deterioration of physical properties as well as the expression of specific properties due to high-speed spinning, post-processing should be performed under different processing conditions than existing regular products, resulting in additional cost increase and quality unevenness.

In the conventional high speed spinning method, the high speed spun polyester as shown in FIG. 1 is quenched in a quenching chamber 4 directly under the detention, and after emulsifying, the yarns are concentrated and wound and the high speed spun polyester as shown in FIG. Is quenched in the quenching chamber 4 directly under the detention, and subsequently heat treated with the line heating device 11, and then tanned. However, such a conventional high-speed spinning method has a disadvantage in that the bactericidal system is lowered due to friction between yarns, and the operability is deteriorated due to problems such as deterioration of heat resistance of the emulsion due to deterioration of the emulsion due to air flow and decrease in lubrication performance.

The present invention improves productivity by preventing deterioration of an oil agent, which is a cause of deterioration of physical properties and poor operability during high-speed spinning, and manufactures a polyester yarn having excellent physical properties such as a general garment yarn.

1 and 2 are process schematic diagrams of conventional polyester high-speed spinning

3 is a fixed schematic view of the polyester high-speed spinning of the present invention.

In Figures 1 to 3, 1 is spin block, 2 is detention, 3 is accident, 4 is quenching chamber, 5 is oiling device, 6 is primary high control, 7 is secondary high control and 8 is guide 9 is a winder, 10 is a winding bobbin, 11 is a line heating device, and 12 is a line quenching device.

The present invention relates to a method for producing a polyester yarn by a high speed spinning method. More specifically, heat treatment is performed by the line heating device 11 between the quenching process and the tanning process during the spinning of the polyester, and the heat treated yarn is cooled by the line quenching device 12 to stabilize the process. It relates to a high-speed spinning method for improving the operability and producing a polyester yarn excellent in physical properties.

In the present invention, the high-speed spun polyester is quenched with a quenching chamber 4 directly under the confinement, and then heated by the line heating apparatus 11 and cooled by the line quenching apparatus 12 before oiling.

The present invention will be described in more detail with reference to the drawings. 3 is a schematic diagram of a polyester high-speed spinning process of the present invention.

The polyester yarn 3 which was spun at high speed through the detention 2 was quenched in the quenching chamber 4 and subsequently heated by the line heating device 11 and cooled by the line quenching device 12, continuously cooled. After the thread is tanned with the oiling device (5), the thread is connected to the winding bobbin (10) through the primary high troll (6), the secondary high troll (7), the guide (8) and the winder (9). Wind up on.

Here, the line heating device 11 is a cylindrical heater having a length of 1.2 to 3.0 m and a temperature of 130 to 180 ° C., and the line quenching device 12 is a cylindrical cooling device having a length of 0.5 to 2.0 m and having a temperature. It is preferable that the temperature is 15 to 25 DEG C. Further, the position of the cooling zone is positioned between the heat treatment apparatus and the tanning treatment unit to prevent hot vulcanization of the heating zone from being transferred to the tanning treatment unit by the running thread.

If the length and temperature of the line heating device 11 or the length and temperature of the line quenching device 12 are out of the scope of the present invention, the bactericidal agent and the operation are inferior, resulting in deterioration of product properties and the production of powder by post-processing. Reduces the quality of.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. At this time, the physical property measuring method of the present invention is as follows.

Strength and elongation (%)

It measured using the JIS-L1017 method. The equipment and conditions are as follows.

Tensile testing machine low speed extension type (manufactured by Instron Co., Ltd.)

Tensile Speed: 300mm / min

Sample length: 250 mm

Ambient temperature 25 ℃, 65% RH

Operability

Full Drum Rate Comparison

· Percentage occurs

Confirmation of white powder in the weaving process by post-processing

Example 1

Polyethylenetephthalate having an intrinsic viscosity of 0.64, a melting point of 261 ° C, and a glass transition temperature of 69 ° C using a spinneret having a temperature of 290 ° C, a detention hole size of 0.2 mm and a number of 36 detention holes using spinneret Melt spun.

In the quenching chamber 4 directly below the spinneret, it is cooled to a temperature of 60 ° C. with a quenching air of 25 ° C., and a line heating device located at the bottom of the quench chamber with a temperature of 180 ° C. with a temperature of 1.2 m in length. 11), the length is 0.5m, the temperature is 15 ℃, cooled by the line quenching device 12 located at the bottom of the line heating device (11) and emulsified, the yarns are concentrated to a speed of 5,000 m / min Wind up.

The measurement results of the physical properties of the polyester yarns thus prepared are shown in Table 2.

Examples 2-6

A polyester yarn was manufactured under the same conditions as in Example 1 except that the length and temperature of the line heating device 11 and the length and temperature of the line quenching device 12 were changed as shown in Table 1.

The measurement results of the physical properties of the polyester yarns thus prepared are shown in Table 2.

Comparative Example 1

A polyester yarn was manufactured under the same conditions as in Example 1 except that the length and temperature of the line heating device 11 were changed as shown in Table 1 and the line quenching device 12 was not used.

The measurement results of the physical properties of the polyester yarns thus prepared are shown in Table 2.

Comparative Example 2

A polyester yarn was manufactured under the same conditions as in Example 1 except that the line heating device 11 and the line quenching device 12 were not used.

The measurement results of the physical properties of the polyester yarns thus prepared are shown in Table 2.

[Table 1]: Processing conditions

TABLE 2 Property Measurement Results

The present invention is superior in productivity compared to the existing high-speed spinning, the productivity is excellent, the variation in strength and elongation is reduced and the bactericidal system is improved to produce a filament yarn having the same physical properties as the yarn for general clothing. In addition, the post-processability is improved by stabilization of the process, and there is no occurrence of powder. Problems such as fume generation in the winding room and air conditioning conditions due to temperature rise have been solved. In addition, it is possible to manufacture a polyester yarn of excellent physical properties with stable four-run.

Claims (5)

The high-speed spinning of the polyester, characterized in that the high-speed spun polyester is quenched with a quenching chamber (4) directly under the detention, and then heated by the line heating device (11) and cooled by the line quenching device (12) before oiling Spinning method. The method of high speed spinning of polyester according to claim 1, wherein the length of the line heating device is 1.2 to 3.0 m. The high-speed spinning method of polyester according to claim 1, wherein the temperature of the line heating device is 130 to 180 ° C. The method of high speed spinning of polyester according to claim 1, wherein the length of the line quenching device is 0.5 to 2.0 m. The high-speed spinning method of polyester according to claim 1, wherein the temperature of the line quenching device is 15 to 25 ° C.