KR20010056613A - Process for preparing polyester/polyamide composit yarn having the property of drawn yarn - Google Patents

Abstract

PURPOSE: A process for preparing a polyester/polyamide composite yarn capable of expressing physical properties of a drawn yarn by only first-stage process without passing through separate drawing processes is provided, which has the advantages of reduction of manufacturing costs, increase of yield and reduction of installation costs of a drawing machine. CONSTITUTION: In manufacturing a composite yarn by composite-spinning polyamide and polyester in a weight ratio of 15:85 to 85:15, filaments are heat-treated by passing through a hot tube(4) in the range of 100 to 200deg.C before winding at a speed of 3,000 to 4,500m/min after spinning. The hot tube having an inner diameter of 20 to 100mm is installed between a spinning nozzle(1) and an oiling guide(6).

Description

Process for preparing polyester / polyamide composite yarn expressing physical properties of stretched yarn and its device {Process for preparing polyester / polyamide composit yarn having the property of drawn yarn}

The present invention provides a partial orientation of yarn properties by mounting a hot tube between a spinning nozzle and a winder for POY (Partially Oriented Yarn) in composite spinning with polyamide and polyester as raw materials. It relates to a method and a device for producing a polyester / polyamide composite yarn in which the physical properties of the drawn yarn is expressed in a one step process.

In general, when polyamide and polyester are wound by composite spinning, an undrawn yarn or a partially oriented yarn is obtained.

The composite fiber thus obtained will have the properties of the drawn yarn only through a separate drawing process or a twisting process.

However, undrawn yarn or partial oriented yarn produced by the conventional method becomes vulnerable over time, so it cannot be stored for a long time and requires a separate drawing process, which leads to an increase in manufacturing cost and a decrease in yield.

An object of the present invention is to solve the above problems, in the production of polyamide / polyester composite yarns, polyester / polyamide composites to express the physical properties of the stretched yarn in a one-step process only without a separate stretching process It is to provide a method and apparatus for manufacturing the yarn.

1 is a manufacturing process schematic diagram of the present invention.

Explanation of symbols on the main parts of the drawings

1: spinning nozzle, 2: cooling wind, 3: composite yarn filament, 4: hot tube,

4 ': hot tube inlet, 5: Heat Source, 6: oiling guide,

7: winder

The present invention is a composite spinning of polyamide and polyester at a weight ratio of 15: 85 to 85: 15 to pass through the nozzle cap (1) to have a cross-section of the composite yarn and to solidify with a cooling wind (2) heat of 100 ~ 200 ℃ The present invention relates to a method and an apparatus for causing physical properties of a stretched yarn to be expressed by winding the applied hot tube 4 and then winding it in the winder 7 at a speed of 3000 to 4500 m / min.

In the present invention, if the position of the hot tube inlet 4 'is set higher than the filament's solidification point, fusion occurs between the filaments, and the desired result cannot be obtained. If the internal temperature of the hot tube 4 is less than 100 ° C, When the expression is insufficient, fusing of filament occurs inside the hot tube 4 when it exceeds 200 ° C.

The higher the internal temperature of the hot tube 4 was, the closer the physical properties of the drawn yarn were. However, if the temperature is raised above a certain level, the filament is fused in the hot tube 4, so the temperature rise is limited. Will be.

In addition, the higher the winding speed in the present invention was able to obtain a result that can be closer to the physical properties of the drawn yarn.

However, if the winding speed is less than 3000m / min, the elongation is high, the physical properties of the stretched yarn is not expressed, and if it is larger than 4500m / min, strength and elongation fall at the same time, the physical properties are vulnerable.

In the present invention, the inner diameter of the hot tube 4 can be adjusted according to the thickness and the number of filaments of the fiber spun as 20 to 100mm.

However, if less than 20mm, the filament fusion occurs in the hot tube (4), and if it exceeds 100mm, the distance between the filament passing through the center of the hot tube (4) and the inner wall of the hot tube (4) is rapidly Since the heat transfer is not made, it is difficult to express the physical properties of the drawn yarn.

Example 1

A hot tube (4) installed under the spinneret (1), in which the polyester and polyamide are spun at a ratio of 8: 2 (weight ratio) and wound at a speed of 3200 m / min to be a composite yarn of 75 denier / 36 filaments. The change in physical properties according to the temperature change of and the results are shown in Table 1.

The inner diameter of the hot tube 4 used at this time was 30 mm, and the position of the hot tube inlet 4 'was installed at a point 100 cm below the nozzle.

Example 2

Physical properties of the polyester and polyamide in the ratio of 8: 2 and wound through the hot tube 4 having an inner diameter of 30 mm set at 180 ° C. to wind the composite yarn of 75 denier / 36 filaments The change was evaluated and the results are shown in Table 2.

Example 3

Physical properties according to the change of winding speed in winding the composite yarn of polyester and polyamide at a ratio of 8: 2 and passing them through a hot tube 4 having an inner diameter of 60 mm set at 170 ° C. to composite yarn of 150 denier / 72 filaments. The change was evaluated and the results are shown in Table 3.

Comparative Example 1

Except that the hot tube was not used, the same as in Example 1 and the results are shown in Table 1 together.

Comparative Example 2

Polyester and polyamide were spun at a ratio of 8: 2 to be wound at 3200 m / min to be a composite yarn of 230 denier / 72 filaments, and finally, a composite yarn of 150 denier / 72 filaments was finally manufactured through a separate drawing process.

The results are shown in Table 3 together.

Table 1

Example 1 Comparative Example 1 Hot tube temperature (℃) 140 160 180 Unapplied Strength (g / d) 3.5 3.7 4.1 3.1 Shinto () 65 59 65 131 10 intensity (g / d) 1.41 1.81 1.88 0.44

TABLE 2

Example 2 Winding speed (m / min) 3400 3700 3900 4500 Strength (g / d) 3.49 3.56 3.52 3.14 Shinto () 48 42 38 26 10 intensity (g / d) 1.98 2.06 2.26 2.38

TABLE 3

Example 3 Comparative Example 2 Winding speed (m / min) 3900 4000 4100 4200 3200 Hot tube temperature (℃) 170 170 170 170 Unapplied Drawing process Unnecessary Unnecessary Unnecessary Unnecessary Separately applied Strength (g / d) 3.81 3.78 3.86 3.87 4.6 Shinto () 54 51 50 49 43 10 intensity (g / d) 1.99 2.04 2.19 2.19 2.38

The composite yarn according to the present invention obtains the properties of the stretched yarn at the same time as spinning, which can solve the problem of long-term preservation that is a problem in the unstretched or partially oriented yarn. There are advantages such as rising, reducing the installation cost of the drawing machine.

Claims (4)

In manufacturing composite fiber by composite spinning polyamide and polyester at a weight ratio of 15: 85 to 85: 15, the filament in a hot tube (4) having a temperature range of 100 to 200 ℃ before winding after spinning Method for producing a polyester / polyamide composite yarn characterized in that the physical properties of the drawn yarn characterized in that the heat treatment by passing through. The method for producing a polyester / polyamide composite yarn according to claim 1, wherein the winding speed is 3000 to 4500 m / min. An apparatus for producing a polyester / polyamide composite yarn, comprising: a polyester / polyamide composite having a physical property of a drawn yarn characterized in that a hot tube (4) is provided between a spinning nozzle (1) and an oil ring guide (6). Manufacturing equipment. 4. The apparatus for producing polyester / polyamide composite yarn according to claim 3, wherein the physical properties of the drawn yarns are characterized in that the inner diameter of the hot tube (4) is 20 to 100 mm.