KR20040049035A - Method of producing polyester interlaced yarn with high-thermal- insulation and light-weight - Google Patents

Abstract

PURPOSE: A manufacturing method of polyester composite air confounded yarn is characterized by controlling pneumatics in interlacing and reducing a change of hollow ratio of hollow fiber. The composite air confounded yarn is characterized by weaving fabric having bulkiness, having excellent strength and elongation, having excellent thermo-keeping property and being lightweight. CONSTITUTION: Polyester composite air confounded yarn is obtained by: preparing polyester hollow fiber and high shrinkage polyester fiber; and then interlacing the fibers at 3-4 bar of pneumatics at 400-450m/min. of discharge velocity.

Description

Method for producing polyester composite air interlock yarn with excellent heat insulation and lightness {Method of producing polyester interlaced yarn with high-thermal- insulation and light-weight}

The present invention relates to a method for producing a polyester composite air entangled yarn having a bulky structure with excellent thermal insulation and lightness by interlacing a polyester hollow fiber and a high shrink polyester fiber.

Hollow yarn is recommended as a material that can be manufactured with light weight and soft fabric as a material having excellent heat insulation and lightness due to hollow inside and excellent resilience and bulkiness after processing. It is important to maintain the hollowness of the state. In general, hollow yarns are broken or shrunk under tension and heat while processing, weaving, weaving, and dyeing. In the entanglement by the common entanglement method, the hollow fiber disappears due to high heat heater temperature. Korean Patent No. 1998-0000013 has the core of the invention to provide bulky blended yarns by entanglement and to enable two-tone expression. However, this also has a disadvantage that is difficult to maintain the hollow form of the hollow yarns and inadequate in providing lightness or softness.

In addition, in order to maintain the hollow ratio of the hollow yarn to the maximum, and to manufacture a fabric having a bulky structure by combining with other companies, the complexation using the interlace method is an appropriate method. Interlacing is a method of interlacing two or more types of yarns to impart a certain knot by air-interlacing the filament yarns. In general, filament yarns are sensitive to the tension during the process, and the yarn's low focusing force tends to cause defects during the weaving process. In order to improve the method was used to give the protection (grass feed) or kink. However, since care needs to be removed after weaving, environmental and cost problems arise. In addition, it is costly to increase the focusing power by twisting the yarn, it is difficult to express the desired touch because the characteristics of the yarn is modified. In addition, when the yarn or protection is subjected to a lot of heat and tension, the hollow ratio of the hollow yarn is likely to decrease.

Therefore, the present invention solves all the problems of the prior art as described above by using the interlacing method can maintain the hollowness and the filament is loosened during weaving to maintain the original yarn properties in the final fabric state It is a technical problem to provide a manufacturing method of polyester composite air entangled yarn which is excellent in lightness and lightness.

In order to solve the above problems, the present inventors use the contraction force difference of semi-stretched hollow fibers having high spontaneous extension and high shrinkage yarns, and improve the existing air entanglement to adjust the air pressure during interlacing to interlace the hollow strain of the hollow yarns. While reducing to the maximum, the present invention has been found to have a bulky structure in fabric manufacturing and improve the feeling of lightness and softness.

Figure 1 is an enlarged photograph of the side of the polyester composite air interlock manufactured by interlacing with the bar pressure 3 bar of the present invention.

2 is an electron scanning microscope photograph of a cross section of a polyester composite air interlock manufactured by interlacing with pneumatic pressure 3 bar of the present invention.

3 is an electron scanning microscope photograph of a cross section of a polyester composite air interlock manufactured by interlacing with 4 bar air pressure according to the present invention.

4 is an electron scanning microscope photograph of a cross section of a polyester composite air interlock manufactured by interlacing with 5 bar of air pressure.

5 is an electron scanning microscope photograph of a cross section of a polyester composite air interlock manufactured by interlacing at 6 bar air pressure.

6 is an electron scanning microscope photograph of a cross section of a hollow yarn not subjected to an interlacing process.

Therefore, according to the present invention, in the method for producing a polyester composite air entangled yarn, interlacing the polyester hollow fiber and the high shrink polyester fiber at an air pressure of 3-4 bar and a release rate of 400-450 m / min. Provided is a method for producing a polyester composite air entangled yarn having excellent heat retention and lightness.

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

In the present invention, the polyester hollow fiber and the high shrink polyester fiber are supplied at the same time to form a knot by air dispersed in the interlace nozzle, so that the two yarns are focused to produce the blended yarn. The polyester hollow fiber, which is a raw material fiber, may be either fully stretched or semi-stretched, but it is preferable to use semi-stretched in order to highlight the bulky structure by expressing a difference in shrinkage force with the high shrink polyester fiber. The high shrink polyester fiber is enclosed by air close to the angle perpendicular to the longitudinal direction of the polyester hollow fiber and to express a knot shape as shown in FIG. In this case, the manufactured interlaced yarn may be heat treated to stabilize the shape in the heat setting zone, but in this case, the hollow ratio tends to decrease, so in the process of the present invention, the heat setting is performed to maintain the hollow ratio. It is preferable not to do this.

In the interlacing process, the air pressure is preferably 3 to 4 bar. The air pressure is less than 3 bar, so the knot of yarn is not formed. When the knot does not loosen, the desired touch is not expressed. However, when the air pressure is 5 bi phase, the hollow ratio tends to decrease rapidly, so it is better to set it to less than 5 bar to maintain the hollow ratio. As shown in FIG. 6, the hollow yarns not interlaced remain intact in the interior of the company, but when interlaced at 6 bar air pressure as shown in FIG. In the present invention, when the air pressure is 3 bar, as shown in FIG. 1, the change of the hollow ratio due to the interlace is small.

The composite entangled yarn produced by the above method is excellent in strength and elongation, and the entanglement of the filament is released during weaving, thereby maintaining the original yarn properties well in the final fabric state.

In the following examples, non-limiting examples of preparing a polyester composite air entangled yarn are given.

Example 1

The polyester POY (semi-stretched) hollow filament 75d / 24f and the high shrink polyester filament 40d / 24f with a non-shrinkage ratio of 30% were interlaced with an interlacer (Murada, Japan) at a speed of 400 m / min and an air pressure of 3 bars. To prepare a 115d / 48f polyester composite air entangled yarn.

Cut the interlaced portion of the manufactured polyester composite air entangled yarn, take a cross section of the hollow fiber and the high shrink polyester filament using an electron scanning microscope (SEM), and measure the area of the hollow yarn and the hollow part using an area meter. The hollow ratio was calculated by (1).

* Hollow rate = (hollow area / section area) × 100

In addition, the strength and elongation of the composite air entanglement were measured using a sinusoidal strength tester (Ziegler Oster, Switzerland), and the dry heat shrinkage and the non-shrinkage rate were measured using a dryer and a thermostatic bath. In addition, the number of entanglements of the composite air entanglement was measured using a entanglement measuring device (Lerson-Hempil, USA).

[Examples 2-3 and Comparative Examples 1-4]

A composite air entangled yarn was prepared in the same manner as in Example 1 except that the air pressure and the release rate of the composite air entangled interlaced were changed as shown in Table 1, and the hollow ratio, strength, elongation, dry shrinkage ratio, and non-shrinkage ratio were measured. 2 is shown.

Air pressure (bar) Release rate (m / min) Example 2 4 400 Example 3 3 450 Example 4 4 450 Comparative Example 1 5 400 Comparative Example 2 6 400 Comparative Example 3 5 450 Comparative Example 4 6 450

Hollow rate (%) Strength (gf / d) Elongation (%) Dry Shrinkage (%) Non-shrinkage rate (%) Number of intersections (per 1 m) Example 1 19.9 2.08 32.2 23.4 31.1 31.8 Example 2 16.3 2.14 32.9 24.6 30.3 36.2 Example 3 19.0 2.07 33.3 23.3 30.3 41.7 Example 4 14.2 2.02 33.2 23.1 29.6 50.9 Comparative Example 1 19.7 1.99 29.9 24.0 33.2 28.8 Comparative Example 2 18.5 2.01 29.7 24.8 30.6 36.0 Comparative Example 3 13.3 1.98 29.5 23.7 29.7 41.1 Comparative Example 4 13.2 2.03 31.7 24.6 29.1 50.8

As described above, according to the present invention, the air pressure at the time of interlacing is adjusted to reduce the change in the hollow ratio of the hollow fiber, and the bulky structure is produced during fabric manufacturing due to the difference in contraction force of the hollow fiber yarn and the high shrink yarn. Since the entanglement of the medium shrinkage polyester filament is released, it is possible to manufacture a composite air entangled yarn having excellent heat insulation and light weight which maintains the original yarn properties well in the final fabric state.

Claims (1)

In the method for producing a polyester composite air entangled yarn, A method for producing a polyester composite air entangled yarn having excellent heat retention and lightness, characterized by interlacing a polyester hollow fiber and a high shrink polyester fiber at an air pressure of 3 to 4 bars and a discharge rate of 400 to 450 m / min.