KR100814226B1 - Shaped yarn - Google Patents

Abstract

A shaped synthetic fiber is provided to improve the sweat-absorbent and quick dry property and the working efficiency, thereby decreasing the dye difference after dyeing of the shaped synthetic fiber, by forming the shaped synthetic fiber to have a wide surface area and moisture transfer channels. A shaped synthetic fiber is a shaped yarn of polyethylene terephthalate or polytrimethylene terephthalate. The shaped synthetic fiber has fiber section shape having two symmetric axes. In the shaped synthetic fiber, a ratio of a minor axis part to a major axis part is 0.15-0.25, an area ratio of the smallest inscribed circle of fiber section to a circumscribed circle of fiber section is 0.02-0.10, and a length ratio of the minor axis part to the major axis part is 0.95-1.00.

Description

Shaped cross section synthetic fiber

1 is a cross-sectional view of a spinneret used to spin a cross-section synthetic fiber of the present invention.

Figure 2 is a cross-sectional photograph of a release cross-section synthetic fiber of the present invention.

Figure 3 is a photograph of a woven fabric dyed with a cross-section synthetic fiber of the present invention.

※ Explanation of code for main part of drawing

a: Long shaft length b: Long shaft thickness

c: short section length A1: fiber cross section

A2: fiber cross section

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a release cross-section synthetic fiber having excellent sweat absorption quick-drying property in which the fiber cross section has two unique axes of symmetry.

Since general synthetic fibers are hydrophobic, they have disadvantages of poor absorption and discharge of moisture and generation of static electricity. In order to compensate for the fundamental disadvantages of the synthetic fibers, the chemical method of adding or copolymerizing a hydrophilic material to the synthetic fiber or using a physical method of hollowing or releasing the cross section of the fiber is used.

Fiber cross-sections widely adopted in the method of release cross-section of the fiber is a dumbbell, W-shaped, wang-shaped, cross-shaped, etc. An important point in the production of such cross-section synthetic fibers is to produce a fiber having a high degree of release with a stable processability It is important. Many existing heteromorphic cross-sectional configurations have shorter shafts than short shafts, which means that there is no deformation of short shafts during flamming or twisting, resulting in deterioration of channel formation that can result in capillary phenomena for real quick absorption and dryness. There was.

Korean Patent Application No. 2003-78289 introduces a method for producing a quick-absorbing quick-drying polyamide fiber having four elliptical protrusions. Deformed sections based on squares with only two axes of symmetry have not been successfully developed due to poor processability, physical property deviations and poor manufacturing processability due to difficulties in cross-section formation during spinneret manufacturing and fiber manufacturing.

Therefore, according to the present invention, there is provided a cross-sectional synthetic fiber having two symmetric axes based on a square for a sweat-absorbing quick-drying material which overcomes problems such as poor physical properties, poor workability, and dyeing difference after dyeing according to the present invention. This is a technical task.

Therefore, according to the present invention, in the cross-sectional synthetic fibers, the fiber cross-section has two symmetry axes, and the ratio of the length of the short axis to the length of the major axis is 0.9 to 1.0, and the ratio of the length of the major axis to the length of the long axis is 0.15 to 0.25. The present invention provides a release cross-section synthetic fiber, characterized in that the polyethylene terephthalate or polytrimethylene terephthalate release cross section fiber having an area ratio of the circumscribed circle of the fiber cross section and the minimum inscribed circle of the fiber cross section is 0.02 to 0.10.

Hereinafter, the present invention will be described in more detail.

The release cross-section synthetic fiber of the present invention is a fiber having a fiber cross section having two axes of symmetry, and having excellent peculiarity of sweat absorption and quick drying.

In order to improve the sweat-absorbent quick-drying, the degree of release and filament of the fiber should be increased, thereby maximizing capillary phenomena by securing a water transfer channel, thereby exhibiting good sweat-absorbent quick-drying performance. The present invention therefore provides a particularly preferred synthetic fiber filament for meeting the above requirements.

The cross-sectional synthetic fiber of the present invention has a symmetrical fiber section having two symmetrical axes, and the ratio of the length of the short axis to the length of the major axis is 0.9 to 1.0, the ratio of the length of the major axis to the length of the major axis is 0.15 to 0.25, The area ratio of the circumscribed circle and the smallest circumscribed circle of the fiber cross section is 0.02 to 0.10. In addition, the release cross-section synthetic fiber is preferably a ratio of the length of the short axis portion to the length of the long axis portion is 0.95 ~ 1.00.

As described above, the release cross-section synthetic fiber of the present invention is a cross-section having two axes of symmetry in which the fiber cross section is inscribed in a square, and has a ratio of the long axis and the short axis almost equal. On the other hand, the rectangular shaped cross-sectional shape of the rectangle has a problem that the length of the short axis is short and the length of the short axis is distorted during the twisting and twisting, so that the moisture transfer channel disappears and the sweat absorption quick-drying property is deteriorated. In addition, the sectional fibers having a much higher number of leaves and blades are not only difficult to manufacture spinnerets, but also have very difficult manufacturing conditions, and have very poor variation in properties and fairness, thereby degrading their value as commodities.

The present invention is to produce a release cross-section synthetic fiber excellent in the degree of release, by controlling the back pressure between the cross-section from the design stage of the detention expresses a uniform release cross-section of uniformity and evenly arranged each cross-section expressing excellent sweat absorption quick drying performance Its feature is that the yarn can be manufactured.

The spinneret used to spin the release cross-section synthetic fiber of the present invention is a cross-type mold of square type as shown in Figure 1, the long axis length (a), the long axis thickness (c), the short axis length (b) and the fiber It is preferable to use a spinneret in accordance with the above conditions so that the area ratio of the circumscribed circle A2 of the cross section and the minimum inscribed circle A1 of the fiber cross section satisfies the cross-sectional condition of the hetero-cross section synthetic fiber.

The release cross-section synthetic fiber of the present invention is preferably any one selected from the group consisting of nylon 6, nylon 66, polyethylene terephthalate and polytrimethylene terephthalate, especially polyethylene terephthalate system having excellent cross-sectional form sweat absorption quick drying performance great.

In the present invention, by directly spinning the release cross-section fiber excellent in water absorption by increasing the voids between the fibers, excellent cross-sectional properties of the fiber excellent in physical properties, spinning processability and overcoming problems such as dyeing difference after dyeing, such as the fabric of Figure 3 It is to make the fiber industrially possible. Therefore, it was possible to produce a uniform release cross section yarn by improving the spinneret and optimizing the spinning conditions.

The following examples are given as non-limiting examples of the release cross-section synthetic fiber of the present invention.

[Examples 1 to 2 and Comparative Examples 1 to 2]

After melting the polyester (PET) resin having an intrinsic viscosity of 0.63 at a temperature of 290 ° C and spinning through 36 hole molds (cross-shaped molds) meeting the conditions shown in Table 1 below, the discharged yarns were cooled to 1500 mm in a cooling cabinet, 0.45. After cooling and solidifying at a wind speed of m / sec, and then wound at 3,200 m / min and stretched 1.68 times to prepare a 50-sided cross-sectional yarn of 50d / 36f.

The absorptivity of the tinnitus cross section yarn obtained by the above Examples and Comparative Examples was measured by the JIS L 1907 method, the dryness JIS L 1906 method, and the glossiness by the CCM measurement method.

   Physical property evaluation results of Examples and Comparative Examples are shown in Table 1.

division Example 1 Example 2 Comparative Example 1 Comparative Example 2 Polymer Melting Temperature (℃) 290 290 290 290 b / a ^{Note 1)} 0.9 0.95 1.2 1.0 c / a ^{Note 2)} 0.15 0.25 0.15 0.45 A1 / A2 ^{Note 3)} 0.02 0.06 0.02 0.20 Shaped cross section ○ ◎ × × Radiation fairness ○ ○ ○ ○ Absorbency (mm) 120 110 85 65 Dryness ○ ◎ × × Dyed tea ◎ ◎ ○ ○ Glossiness ◎ ◎ ○ ○

^{Note 1)} Ratio of shortened part length to long shaft part length

^{Note 2)} Ratio of major shaft thickness to major shaft length

^{Note 3)} Area ratio between the circumscribed circle of the fiber section and the minimum inscribed circle of the fiber section

Therefore, according to the present invention, it is possible to provide a release cross-section synthetic fiber of excellent physical properties having a large surface area and a moisture-transfer channel having excellent sweat absorption and dryness, good workability, and low dyeing difference after dyeing.

Claims (3)

In the sectioned synthetic fiber, the fiber section has two symmetry axes, the ratio of the length of the short axis to the length of the major axis is 0.9 to 1.0, the ratio of the length of the major axis to the length of the major axis is 0.15 to 0.25, and the circumscribed circle of the fiber section. And cross-sectional fibers of polyethylene terephthalate or polytrimethylene terephthalate having a minimum inscribed area ratio of 0.02 to 0.10. delete The method of claim 1, wherein the release cross-section synthetic fiber is a single-sided synthetic fiber, characterized in that the ratio of the length of the short axis portion to the length of the long axis portion is 0.95 ~ 1.00.

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