KR100853709B1 - Air-texturing synthetic multifilament with fine denier and method of manufacturing the same - Google Patents

Abstract

An air-texturing synthetic multi-filament with fine denier and a manufacturing method thereof are provided to obtain highly uniform and stable textile by preventing the streak of textile from generating, and to realize light weight by using textured yarn with low denier, and to lower the manufacture cost. A textured yarn is formed by air-texturing a single strand of the synthetic multi-filament. The instability of the air-texturing synthetic multi-filament is 0.1-1.0 %. The increment rate of total fineness of the synthetic multi-filament after air-texturing is 1-8 % compared with that of the synthetic multi-filament before air-texturing. The non-uniformity rate(U%) of the air-texturing synthetic multi-filament having fine denier is 1.5-3.5%. The total fineness of the air-texturing synthetic multi-filament with fine denier is 20-75 denier. The fineness of the air-texturing synthetic multi-filament having fine denier is 0.5-1.5 denier. The synthetic multi-filament is formed of one of the polyamide multi-filament and the polyester. The air-texturing synthetic multi-filament having fine denier is formed by supplying one strand of the synthetic multi-filament into the air-texturing nozzle, and by air-texturing with air of 6-15 kgf/cm^2 pressure, and by heat treating.

Description

Semdodo synthetic multifilament yarn and its manufacturing method {air-texturing synthetic multifilament with fine denier and method of manufacturing the same}

1 is a schematic view of another air processing process in the present invention.

Figure 2 is an electron micrograph of a conventional air working yarn (air texturing processing yarn).

Figure 3 is an electron micrograph of a fine-grained synthetic multifilament yarn according to the present invention.

* Explanation of symbols on the main parts of the drawings

1: synthetic multifilament (yarn) 2: first feed roller

3: air processing nozzle 4: water supply device

5: 2nd supply roller 6: hollow heater

7: winding roller

The present invention relates to a fine-grained synthetic multifilament yarn and its manufacturing method, and more particularly, the present invention is excellent in the stability of the loop, the loop is uniform, it is used as a weft yarn as well as warp yarns in the fabric manufacturing fabric with a cotton-like yarn. The present invention relates to a fine-grained synthetic multifilament yarn and a method for producing the same, which have a low cutting ratio during air processing and are excellent in manufacturing processability.

Many efforts have been made to give synthetic fibers the same effect as natural fibers. Among them, a method for reducing the smooth surface characteristics of synthetic filaments is a method of compositing biaxial intertwined yarns having different flammability and shrinkage characteristics, and an air texuring method for producing a cotton-like effect. Representative. A general filament is used in the warp direction of the fabric, and a fabric made of the weft yarn of the air-texturing yarn is usually referred to as Taslan (trade name). Taslan fabric has a surface with a loop formed on the surface like cotton, so it is mainly used in sportswear such as ski suits, jackets, and casual outerwear due to the thermal insulation effect by the loop, increase in friction coefficient, and similar texture to cotton. It is a fabric.

In general, air texturing processing supplies two yarns to the nozzle at different speeds by feeding the yarn with two different overfeed rates. Looping in and judging is the principle by which such yarns can be entangled to give stability to the yarn. Basically, since the air texturing processing method supplies two yarns and is supplied in an overfeed state, the final air texturing processing yarn is usually 20 denier or more higher than the denier sum of the two yarns.

Recently, the preference trend of the fabric is increasing interest in the light weight and soft touch of the fabric by the finer finer as the other types of fabric. When the fabric is woven using the yarn of fineness, the thickness of the fabric becomes thinner and the paper becomes thin, and the weight of the fabric can be satisfied, which can satisfy the lightweight required in recent sportswear. In addition, in the case of foil rather than Fuji, it feels much softer and feels cooler, so for the fabrication of the fabric, we prefer to use yarn of fine fineness in the direction of inclined filament and use air fine-textured yarn of low fineness in the weft direction at the same time. Should be used. In addition, if the use of air fine-textured yarn of low fineness to the inclination can exhibit the thermal insulation effect by the loop, the increase of the coefficient of friction, and the texture similar to that of the conventional Taslan fabric.

Conventionally, the technique of using the fine filament in the inclined direction has been progressed a lot, but the conventional air texturing processing yarn had a problem of poor weaving when using the inclined furnace because of the loop formed in the surface of the processing yarn as shown in FIG. .

Figure 2 is an electron micrograph of a conventional air texturing process.

In general, when manufacturing a fine-grained fine air-textured yarn of 100 denier or less, two strands of 40 or less denier should be air-processed. However, when processing by this method, since the production per unit time is basically small, the manufacturing cost is high. In addition, there is a problem of rising manufacturing costs from the yarn introduction stage, since the finer yarn is used. When processing two fine yarns of fine-grained yarns, the stability of the processed yarn may be high due to the structure of the screening / weaving yarn. In addition, there is a problem that can not increase the processing speed due to frequent mechanical cutting due to low strength.

In order to solve the above problems, the present invention has excellent loop stability and uniform loops, so that weaving fabrics can be used as a weft yarn as well as a ramp when fabricating a paper fabric having a touch such as cotton spinning yarn. It is excellent in manufacturing processability, and only one strand of fineness yarn (filament) is air-processed to provide a synthetic filament processed yarn having fineness and its manufacturing method.

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

First, the manufacturing method of the fine-grain synthetic multifilament yarn according to the present invention is 1 to 8% overfeed rate of the synthetic multifilament 1 strand into the air processing nozzle (3) through the first feed roller (2) as shown in FIG. At the same time as supplying the air to the air processing nozzle 3, the air pressure of 6 ~ 15kgf / ㎠ to supply air to the synthetic multifilament passing through the air processing nozzle (3) synthetic multifilament air processing Then, it is characterized in that the heat treatment continuously.

1 is a schematic diagram of an airtexturing process according to the present invention.

Specifically, one fine strand of fine multi-filament (yarn) is supplied through the first feed roller 2 into the air processing nozzle 3 at an overfeed rate of 1 to 8%.

The overfeed rate is adjusted by changing the rotational linear speeds of the first supply roller 2 and the second supply roller 5.

If the overfeed rate is out of the above range, the loop becomes uneven or the loop stability deteriorates.

The rotational linear speed of the first supply roller 2 is preferably 200 to 800 m / min.

Before supplying the fine-grained synthetic multifilament 1 into the air processing nozzle 3 as described above, water is supplied to the fine-grained synthetic multifilament 1 by the water supply device 4, more preferably, deionized water. It is good to supply.

The fine-grained synthetic multifilament 1 has a total fineness of 20 to 70 denier and a single yarn fineness of 0.5 to 1.5 denier is preferable for use as a warp cloth for fabric after air processing.

The fine-grained synthetic multifilament 1 is polyamide multifilament or polyester multifilament.

Next, as described above, one strand of fine-grained synthetic multifilament (1) is supplied into the air processing nozzle (3), and at the same time, the air pressure of 6-15 kgf / cm2 is supplied into the air processing nozzle (3). The fine fine particles passing through the air processing nozzle 3 are injected into the synthetic multifilament 1 to perform air processing.

When the air pressure is out of the above range, the vibration phenomenon becomes severe and a loop is unevenly generated, the trimming occurs frequently during air processing, or the air processing is not sufficient.

Next, as described above, the air-treated yarn 1 is heat-treated in a heat treatment apparatus such as a hollow heater 6 to produce a fine-grain synthetic multifilament yarn according to the present invention.

The heat treatment is preferably carried out at a temperature of 160 ~ 200 ℃, below 160 ℃ the stability of the loop is lowered, if exceeding in 200 ℃ may cause problems such as the strength of the processed yarn is reduced and the color changes (yellowing) have.

The fine-grained synthetic multifilament yarn manufactured as described above is one of the fine-grained fine-grained multifilament air-processed alone, and has an instability of 0.1 to 1.0%.

If the instability is less than 0.1%, the stability is excellent, but there is almost no loop generation, and the improvement effect such as touch is low. If the instability exceeds 1.0%, the loop is formed unstable and the weaving efficiency is lowered when the ramp is used.

In addition, the fine-grained synthetic multifilament yarn of the present invention has a total fineness of 20 to 75 denier, an increase in the total fineness of the air-processed yarn is 1 to 8% compared to the total fineness of the synthetic multifilament before air processing, the single yarn fineness is 0.5 ~ 1.5 denier level, and unevenness (U%) is 1.5 ~ 3.5%.

3 is an electron micrograph of a fine-grained synthetic multifilament yarn according to the present invention.

In the present invention, the instability, inhomogeneity (U%) and weaving efficiency of the fine-grained synthetic multifilament yarn were evaluated by the following method.

Instability

Semdodo multi-filament yarn (hereinafter abbreviated as "work") is wound 10 times in yarn krill to make a skein, and after measuring the length after 1 minute with the weight of 0.01 cN / dtex, the length is defined as L1, 0.5 L1 is defined as the length of the weight of cN / dtex weighed for 1 minute and then measured by the weight of 0.01 cN / dtex of initial tension.

Next, the measured instability is calculated by substituting the measured L1 and L2 into the following equation.

The lower the instability, the better the stability.

· Inhomogeneity (U%)

Using a tester 80 (type C) manufactured by Keisokki Co., Ltd., Japan, the test was carried out at a speed of 25 m / min in normal mode.

· Weaving efficiency (%)

The weaving yarn is used as a warp, and when weaving 100 yards in weaving, we calculate the percentage rate of being united without cutting and then weaving it.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

However, the present invention is not limited by the following examples.

Example  One

After feeding the ionized water to the nylon 6 multifilament 1 strand of 50 denier / 48 filament in the water supply device 4 as shown in Figure 1, the nylon 6 filament 1 strand through the first feed roller (2) The nylon 6 multifilament is subjected to air processing (air entanglement) by supplying air into the air processing nozzle 3 at an overfeed rate of%, and simultaneously supplying air having an air pressure of 12 kgf / cm 2 into the air processing nozzle 3, The air-processed yarn was heat-treated at 190 ° C. in the hollow heater 6 to prepare an air-processed (air-texturing) processed yarn.

The results of evaluating the denier (total fineness), instability, and unevenness (U%) of the manufactured air-processing (air-texturing) processor are shown in Table 2.

Next, the results of evaluating the weaving efficiency while weaving the woven fabric using the air processing (air-texturing) processed yarn manufactured as described above as warp and weft are shown in Table 2.

Example  2 to Example  5 and Comparative Example  1 to Comparative Example  3

When manufacturing the air processing (air texturing) yarn, change the type of yarn, overfeed rate, air pressure, and heat treatment temperature supplied to the air processing nozzle (3) as shown in Table 1, and the structure and weft type when weaving the table. Except for the change as described in Example 1, the same process as in Example 1 was prepared by the air processing (air-texturing) processing yarn and fabric comprising the same.

The results of evaluating the denier (total fineness), instability, and unevenness (U%) of the manufactured air-processing (air-texturing) processor are shown in Table 2.

Manufacture conditions division Manufacturing Conditions of Air-Texuring Machine Weaving condition Type of supplier Overfeed rate (%) Air pressure (kgf / ㎠) Heat treatment temperature (℃) group Slope Type Weft type Example 1 Nylon 6 multifilament with 50 denier / 48 filaments 4 12 190 Plain weave Processed sand of Example 1 Processed sand of Example 1 Example 2 30 denier / 34 filament nylon 6 multifilament 6 13 180 Plain weave Processed sand of Example 2 Processed sand of Example 1 Example 3 70 denier / 68 filament nylon 6 multifilament 5 12 190 Plain weave Processed sand of Example 3 Processed sand of Example 1 Example 4 50 denier / 72 filament polyester multifilament 7 12 190 Plain weave Processed sand of Example 4 Processed sand of Example 1 Example 5 30 denier / 24 filament polyester multifilament 6 13 180 Plain weave Processed sand of Example 5 Processed sand of Example 1 Comparative Example 1 Nylon 6 multifilament with 50 denier / 48 filaments 15 12 190 Plain weave Processed yarn of Comparative Example 1 Processed sand of Example 1 Comparative Example 2 Nylon 6 multifilament with 50 denier / 48 filaments 4 4 190 Plain weave Processed yarn of Comparative Example 2 Processed sand of Example 1 Comparative Example 3 Nylon 6 multifilament with 50 denier / 48 filaments 4 17 190 Plain weave Processed yarn of Comparative Example 3 Processed sand of Example 1

Comparative Example  4

One of the two strands of 20 denier / 13 filament nylon 6 multifilament is used as the screening and the remaining one is used as the superfine yarn.The above screening is 12% overfeed rate, and the superfiber yarn is processed at 26% overfeed rate. The nozzles were supplied to the nozzles, respectively, and the air-interlaced yarns were heat-treated at 190 ° C. at an air pressure of 10 kfg / cm 2 to prepare an air-textured yarn.

The results of evaluating the denier (total fineness), instability, and unevenness (U%) of the manufactured air-processing (air-texturing) processor are shown in Table 2.

The results of evaluating the weaving efficiency while weaving the woven fabric of the plain weave using the air-textured processed yarn manufactured as described above and using the weft yarn manufactured in Example 1 are shown in Table 2.

Evaluation of Physical Properties and Weaving Efficiency of Fine-grained Multifilament Yarn division Processor Denier Instability (%) Inhomogeneity (%) Weaving efficiency (%) Example 1 52.7 0.54 2.37 94 Example 2 32.1 0.67 2.14 87 Example 3 75.4 0.53 1.97 95 Example 4 53.6 0.72 2.54 85 Example 5 32.2 0.54 2.73 79 Comparative Example 1 56.8 1.22 3.82 40 Comparative Example 2 51.8 2.14 2.62 37 Comparative Example 3 52.8 1.72 3.77 16 Comparative Example 4 49.6 1.84 3.93 14

Since the present invention manufactures a fine-grained synthetic multifilament yarn by air-processing one strand of synthetic multifilament in the air processing nozzle (3), the three-fiber yarn for air processing is fine compared to the case of air-processing two strands of synthetic multifilament. It does not need to be drawn, and the processed yarn is useful as a warp for foil fabrics because the loops are formed uniformly and fineness, expresses the same feel as cotton spun yarns during fabrication of fabrics and is excellent in lightness and refreshing feeling.

The manufacturing method of the processing according to the present invention is not only to reduce the cost of high fineness yarn that was a problem in the production of fine-grained processing yarn, but also low cutting rate during processing, even loop is uniformly used three Fineness of the processed sand can be produced. When the fabric is manufactured using this processed yarn, the denier of the processed yarn can be felt to be light, and the uniformity and stability of the loop can be maintained to maintain the touch by the loop, and the loop is released due to uneven tension. The occurrence of streaky caused by non-uniformity is suppressed to enable the manufacture of fabric of excellent quality.

Claims (12)

Single thread of synthetic multifilament is air processed by itself, and instability is 0.1 ~ 1.0%, and the total fineness increase rate of air processed yarn is 1 ~ 8% compared to the total fineness of synthetic multifilament before air processing. Fine-grained synthetic multifilament yarn. delete The fine-grained synthetic multifilament yarn of claim 1, wherein the unevenness (U%) is 1.5 to 3.5%. The fineness composite multifilament yarn of claim 1, wherein the total fineness of the fineness composite multifilament yarn is 20 to 75 denier. The fine fine synthetic multifilament yarn of claim 1, wherein the single fineness of the fine fine synthetic multifilament yarn is 0.5 to 1.5 denier. The fine-grained synthetic multifilament yarn of claim 1, wherein the synthetic multifilament is one selected from polyamide multifilament and polyester. While supplying one strand of the synthetic multifilament at an overfeed rate of 1 to 8% through the first feed roller 2 having a rotational speed of 200 to 800 m / min, the air processing nozzle 3 Manufacturing the fine-grained synthetic multifilament yarn, characterized in that for air processing the synthetic multifilament passing through the air processing nozzle (3) by supplying air with an air pressure of 6 ~ 15kgf / ㎠, and subsequently heat treatment it Way. delete 8. A method according to claim 7, characterized in that water is supplied to the synthetic multifilament with a water supply device (4) before the synthetic multifilament is supplied into the air processing nozzle (3). The method for producing a fine-grained synthetic multifilament yarn according to claim 7, wherein the water supplied to the synthetic multifilament is deionized. The method for producing a fine-grained synthetic multifilament yarn of claim 7, wherein the heat treatment is performed at a temperature of 160 to 200 ° C. delete

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