KR100667623B1 - A polyamide yarn with excellent dry and absorption for sweat, and a process of preparing the same - Google Patents

Abstract

The present invention relates to a sweat-absorbent quick-drying polyamide fiber and a method for producing the same, the sweat-absorbing quick-drying polyamide fiber of the present invention has four elliptical protrusions on the fiber cross-section, the circumscribed circle (S3) of the fiber cross-section and the minimum inscribed circle ( The area ratio (area of S3 / area of S1) of S1) is 5-30, and the area ratio (area of S3 / area of S2) of the circumscribed circle S3 of the fiber cross section and the maximum inscribed circle S2 of the fiber cross section is 5-20. It is characterized by that.

In the present invention, the two pieces of straight protrusion slits (2) are formed at the angle (θ) of 110 to 140 ° at the both ends of the straight center slit (1), respectively. (1) The length is produced by melt spinning into a spinneret hole (Hole) of 1 ~ 1.5 times the length of the protrusion slit (2).

Sweat-absorbent quick-drying, mold cross section, polyamide, fiber, mold release degree, detention.

Description

Absorbent quick-drying polyamide fiber and its manufacturing method {A polyamide yarn with excellent dry and absorption for sweat, and a process of preparing the same}             

1 is a cross-sectional schematic diagram of a sweat-absorbent quick-drying polyamide fiber according to the present invention.

2 to 4 are schematic diagrams showing the form of spinneret holes (Hole) used to produce the sweat-absorbing quick-drying polyamide fibers of the present invention.

※ Explanation of main parts in drawings

Y: fiber cross section S1: minimum inscribed circle of fiber cross section

S2: Maximum inscribed circle of fiber cross section S3: Outlined circle of fiber cross section

1: center slit of the spinneret hole 2: protrusion slit of the spinneret hole

3: wing slit of the spinneret hole

The present invention relates to a polyamide fiber having a property of absorbing sweat quickly and drying quickly (hereinafter referred to as "absorbing quick drying") and a method for producing the same.                         

Polyamide fiber is widely used as a yarn for clothing because of its excellent physical and chemical properties, but it lacks the property of absorbing moisture or sweat (absorbency) compared to natural fiber, resulting in lowered comfort or static electricity in winter. It causes a problem such as a high quality clothing material has a somewhat insufficient disadvantage.

In the case of the garment fibers, it is desirable to have a quick-drying moisture absorption so that good comfort can be expressed in the production of knitted fabrics.

BACKGROUND ART [0002] As a conventional technique for producing sweat-absorbent quick-drying fibers, a chemical method of modifying a polymer by adding a hydrophilic polymer during chip manufacturing, and a physical method of changing a cross section of a fiber or compounding a fiber have been used.

Representative chemical methods for producing quick-drying fibers absorbed by polymer modification include forming hollow portions in the fibers and forming micropores on the fiber surface.

The method was designed to form fine pores on the fiber side or inside the fiber and to connect these micropores to the fiber surface to absorb and disperse sweat well by capillary action of the fiber. To this end, a microporous modifier is added in the polymerization step to form a polymerization composition, and a hollow fiber is produced during spinning, followed by eluting the microporous forming agent in an alkaline weight loss step to form a fine through channel to the inside of the hollow part so that the water on the surface of the fiber It can be easily moved into the hollow portion.

For example, Japanese Patent Publication No. 85-194116 describes a method of post-processing hollow fiber mixed with metal sulfonate to form micropores on the fiber surface, and Japanese Patent Publication No. 55-107510 and Japanese Patent Publication No. 61-231221 describes alkali-reduced modified polyester fibers containing a certain amount of polyoxyalkylene glycol or derivatives thereof to form micropores that penetrate from the fiber surface to the hollow portion, thereby absorbing the fibers by capillary action. A method of improving is proposed.

However, the hollow modified fiber manufacturing method has a difficulty in the process of modifying the micropores on the fiber surface to the hollow portion, and because the polymer modifier is used, the production process is more complicated than the physical method using a special release section material. In addition, cost reduction and environmental pollution can occur due to the essential reduction process during post-processing.

On the other hand, as a physical method of imparting quick-drying moisture absorption by the cross-sectional change of the fiber and various complexes, Japanese Patent Laid-Open Nos. 81-112535 and 85-259618 include a method using a special release cross-section yarn, No. 59-1708 discloses a technique for producing a heterogeneous cross-section yarn by discharging yarns having different cross-sectional shapes and fineness from different molds and then combining them in a spinning process.

However, as described above, the method for producing a special shaped cross-section yarn has a problem that it is difficult to apply to a polyamide fiber having a relatively poor cross-sectional shape, although it is suitable for a polyester fiber having a complicated cross-sectional shape and easy cross-section.

An object of the present invention is to provide a polyamide fiber having a release cross-sectional shape that is easy to manufacture even with a polyamide resin having a relatively poor cross-sectional property, and at the same time excellent in water absorption and quick-drying in order to solve such problems.

The present invention is to provide a cross-sectional shape of the polyamide fiber that can easily improve the absorption quick-drying of the polyamide fiber while relatively easy to form a cross section.

In addition, the present invention is to provide a method for producing the absorbent quick-drying polyamide fibers having the above cross-sectional shape.

The sweat-absorbing quick-drying polyamide fiber of this invention for achieving such a subject has four elliptical protrusions on a fiber cross section, and the area ratio (S3) of the area of the circumscribed circle S3 of a fiber cross section and the minimum inscribed circle S1 of a fiber cross section. / S1) is 5 to 30, and the area ratio (area of S3 / area of S2) of the circumscribed circle S3 of the fiber cross section and the maximum inscribed circle S2 of the fiber cross section is 5 to 20.

In addition, according to the present invention, in the method for producing the sweat-absorbing quick-drying polyamide fiber, two linear protrusion slits (2) are formed at the angle (θ) of 110 to 140 ° at each of both end portions of the straight center slit (1). It is characterized in that the central slit (1) is melt-spun into a spinneret hole (Hole) of 1 ~ 1.5 times the length of the protrusion slit (2).

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

1 is a cross-sectional schematic view of a sweat-absorbing quick-drying polyamide fiber according to the present invention.                     

The polyamide fiber of the present invention has the same cross-sectional shape as the Y portion of FIG.

In other words, the polyamide fiber of the present invention (the portion Y in Fig. 1) has four elliptical protrusions formed on its cross section.

Moreover, the polyamide fiber of this invention has the area ratio (area of S3 / area of S1) of the circumscribed circle S3 of a fiber cross section, and the minimum inscribed circle S1 of a fiber cross section, 5-30, More preferably, it is 10-20.

If the area ratio is less than 5, the rate of water migration decreases and the absorbency of the fiber is decreased, and if it exceeds 30, the absorbency is improved, but cross-sectional formation is difficult, unevenness (u%) increases, and dyeing is uneven. Done.

Moreover, the polyamide fiber of this invention has the area ratio (area of S3 / area of S2) of the circumscribed circle S3 of a fiber cross section, and the largest inscribed circle S2 of a fiber cross section, 5-20, More preferably, it is 10-20.

If the area ratio (area of S3 / area of S2) is less than 5, the water movement speed is reduced to reduce the absorbency of the fiber, and if it exceeds 30, the absorbency is improved, but cross-sectional formation is difficult, and unevenness (Uneveness, u%) increases and staining becomes uneven.

In particular, the area ratio (area of S3 / area of S1) of the circumscribed circle S3 of the fiber cross section and the minimum inscribed circle S1 of the fiber cross section, and the area ratio (S3) of the circumscribed circle S3 of the fiber cross section and the maximum inscribed circle S2 of the fiber cross section. It is more preferable that the area / area of S2) is all 10-20.

As shown in FIG. 1, the circumscribed circle S3 of the fiber cross section is a circle passing through all of the other circular protrusion vertices of the fiber cross section.

On the other hand, the minimum inscribed circle S1 of the fiber cross section is a circle whose diameter is the minimum height of the fiber cross section.

In other words, the minimum inscribed circle (S1) of the fiber cross section is a circle having a diameter of a straight line having a relatively short length among two straight lines connecting two concave portions formed when the protrusions of the fiber cross section meet each other in the vertical and horizontal directions. to be.

On the other hand, the maximum inscribed circle (S2) of the fiber cross section is a circle having a diameter of a straight line having a relatively long length among two straight lines connecting two concave portions formed when the protrusions of the fiber cross section meet each other in the vertical and horizontal directions. to be.

The area ratio (area of S3 / area of S1) of the circumscribed circle (S3) and the minimum inscribed circle (S1) and the area ratio (area of S3 / area of S2) of the circumscribed circle (S3) and the maximum inscribed circle (S2) are polyamide polymers. The viscosity, winding speed, cooling air temperature and speed, and spinning temperature can be properly managed and controlled.

When the polyamide fibers (monofilaments) of the present invention described above are concentrated in bundle form to produce polyamide multifilament, the mono-focused monofilaments are cross-sectional shape of the fibers (monofilament) having four elliptical protrusions. The flow path of fine water is formed between the filaments to increase the water moving speed, thereby greatly improving the water absorption of the polyamide multi-filament.

In the sweat-absorbing quick-drying polyamide fiber of the present invention described above, as shown in Fig. 2, two straight protrusion slits 2 are formed at the angle θ of 110 to 140 ° at each end of the straight center slit 1. It is produced by melt spinning a polyamide polymer with a spinneret hole (Hole), or two straight projection slits (2) in each of the two ends of the center slit (1) of the straight line as shown in Figs. and a spinneret hole (Hole) formed of (θ) and having linear wing slits 3 formed at a point between the distal end of the protruding slits 2 or the longitudinal center point of the protruding slits 2. The amide polymer is prepared by melt spinning.

It is more preferable to arrange the wing slit 3 as above in the protrusion slit 2 to form an elliptical protrusion on the fiber cross section.

When the wing slits 3 are disposed inward of the length center point of the protrusion slit 2, cross-sectional formation of fibers is difficult due to the die swell of the polymer.

The length of the center slit 1 of the spinneret hole (Hole) is 1 ~ 1.5 times the length of the protrusion slit (2).

If the length of the center slit 1 is smaller than the length of the protrusion slit 2, the area ratio (area of S3 / area of S1) between the circumscribed circle S3 of the fiber cross section and the minimum inscribed circle S1 of the fiber cross section is reduced, so that the absorbency is deteriorated. do.

On the other hand, when the length of the center slit 1 exceeds 1.5 times the length of the protrusion slit 2, the area ratio of the circumscribed circle S3 of the fiber cross section and the minimum inscribed circle S1 of the fiber cross section (area of S3 / area of S1) Excessively increased, making it difficult to form a fine passage of moisture, and thus absorbency is lowered.

Further, the width of the center slit 1, the projection slit 2 and the wing slit 3 is preferably 0.08 mm, and the length of the wing slit 3 is more preferably 0.25 mm.

Hereinafter, the present invention will be described in detail through Examples and Comparative Examples. However, the present invention is not limited only to the following examples.

Example 1

The polyamide 6 polymer was melt spun into a spinneret hole (Hole) as shown in FIG. 2 to have a fiber cross section as shown in FIG. 1, and an area ratio (S3) of the circumscribed circle S3 of the fiber cross section and the minimum inscribed circle S1 of the fiber cross section. A quick-drying quick-drying polyamide fiber having an area ratio of (area / area of S1) is 5 and an area ratio (area of S3 / area of S3) of the circumscribed circle S3 of the fiber cross section and the maximum inscribed circle S2 of the fiber cross section is produced.

The results obtained by measuring the absorption area, absorption time and absorption height of the polyamide fibers thus prepared are shown in Table 2.

Examples 2 to 3 and Comparative Example 1

Shape of spinneret hole (Hole), area ratio of circumscribed circle (S3) of fiber cross section and minimum inscribed circle (S1) of fiber cross section and circumscribed circle (S3) of fiber cross section and maximum inscribed circle of fiber cross section A quick-absorbing quick-drying polyamide fiber was prepared in the same manner as in Example 1 except that the area ratio (area of S3 / area of S2) of (S2) was changed as shown in Table 1.

The results obtained by measuring the absorption area, absorption time and absorption height of the polyamide fibers thus prepared are shown in Table 2.

Manufacture conditions division Form of spinneret hole Area of S3 / area of S1 Area of S3 / area of S2 Example 1 2 5 5 Example 2 3 15 10 Example 3 4 25 20 Comparative Example 1 Rotunda One One

Property evaluation result division Absorption Area (㎠) Absorption time (second) Absorption Height (cm) Example 1 4 48 5.2 Example 2 5 40 7.3 Example 3 7 35 9.2 Comparative Example 1 2 60 4.4

Absorption area and absorption time of Table 2 were measured by dropping method to find the area and time until 0.1 ml of water droplets are absorbed by dropping the sample (20 × 20cm), and the absorption height is a part of specimen (20 × 9cm). (2.5㎝) was soaked in water and left for 10 minutes, and then measured by the Byrec method to find the height of the water up the specimen.

The polyamide fiber of the present invention is excellent in sweat-absorbent quick-drying can greatly improve the comfort of the garment during garment manufacturing.                     

In addition, the present invention can easily and easily produce the moisture-absorbing quick-drying polyamide fibers.

Claims (6)

It has four elliptical protrusions on the fiber cross section, and the area ratio (area of S3 / area of S1) of the circumscribed circle S3 of the fiber cross section and the minimum inscribed circle S1 of the fiber cross section is 5 to 30, and the circumscribed circle S3 of the fiber cross section. ) And the area ratio (area of S3 / area of S2) of the maximum inscribed circle S2 of the fiber cross section is 5 to 20, characterized in that the quick-drying polyamide fiber. The sweat absorption quick-drying polyamide fiber according to claim 1, wherein the area ratio (area of S3 / area of S1) of the circumscribed circle S3 of the fiber cross section and the minimum inscribed circle S1 of the fiber cross section is 10 to 20. The sweat absorption quick-drying polyamide fiber according to claim 1, wherein the area ratio (area of S3 / area of S2) of the circumscribed circle S3 of the fiber cross section and the maximum inscribed circle S2 of the fiber cross section is 10 to 20. In the polyamide polymer, two straight protrusion slits (2) are formed at each end of a straight center slit (1) at an angle (θ) of 110 to 140 °, and the length of the center slit (1) is a protrusion slit (2). A method for producing the sweat-absorbing quick-drying polyamide fiber of claim 1, characterized in that it is melt-spun into a spinneret hole (Hole) 1 to 1.5 times the length. The method for producing the quick-absorbing quick-drying polyamide fiber according to claim 4, wherein straight wing slits (3) are formed at each of the distal ends of the projection slits (2) of the spinneret. The process for producing the quick-absorbing quick-drying polyamide fiber according to claim 4, wherein straight wing slits (3) are formed between the length center point and the distal end of the projection slits (2) of the spinneret.

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