KR0146570B1 - Polyester fiber - Google Patents

Polyester fiber

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Publication number
KR0146570B1
KR0146570B1 KR1019950061200A KR19950061200A KR0146570B1 KR 0146570 B1 KR0146570 B1 KR 0146570B1 KR 1019950061200 A KR1019950061200 A KR 1019950061200A KR 19950061200 A KR19950061200 A KR 19950061200A KR 0146570 B1 KR0146570 B1 KR 0146570B1
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KR
South Korea
Prior art keywords
peak
tanδ
temperature
polyester fiber
speed
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KR1019950061200A
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Korean (ko)
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KR970043402A (en
Inventor
황영남
Original Assignee
이웅열
주식회사코오롱
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Priority to KR1019950061200A priority Critical patent/KR0146570B1/en
Publication of KR970043402A publication Critical patent/KR970043402A/en
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Publication of KR0146570B1 publication Critical patent/KR0146570B1/en

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/02—Heat treatment
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]

Abstract

본 발명의 측정주파수 110Hz에서 tanδ값이 다음과 같은 온도 범위에서 피크를 발현하고,In the measurement frequency 110Hz of the present invention, the tanδ value expresses a peak in the following temperature range,

각 피크의 tanδ값이 다음의 범위를 가지는 폴리에스테르 섬유에 관한 것으로서,The tanδ value of each peak relates to a polyester fiber having the following range,

상기 특성을 만족하는 본 발명의 폴리에스테르 섬유는 5,000mpm 이상의 고속방사에 의해 제조되면서도 일단계 방사공정법으로 제조된 사와 물성이 유사한 장점을 가진다.The polyester fiber of the present invention that satisfies the above characteristics has similar advantages to the yarns produced by the one-stage spinning process method while being manufactured by high speed spinning of 5,000 mpm or more.

Description

폴리에스테르섬유Polyester fiber

도면은 주파수 110Hz에서 피크값을 나타낸 그래프이다.The figure is a graph showing peak values at a frequency of 110 Hz.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

α:1차 전이 피크 β:2차 전이 피크α: first-order transition peak β: second-order transition peak

β':2차 전이의 우측 어깨 피크β ': right shoulder peak of secondary transition

본 발명은 폴리에스테르 섬유에 관한 것으로서, 상세하게는 고속 일단계 방사(high speed one step draw-spinning process)를 이용해 제조된 폴리에스테르 섬유로서 그 물성이 일반적인 일단계 방사연신공정(one step spin draw process)이나 이단계 방사연신공정(two step process)에 의해 제조된 섬유의 물성에 필적하는 물성을 갖는 폴리에스테르 섬유에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester fiber, and in particular, a polyester fiber manufactured by using a high speed one step draw-spinning process, the physical property of which is a general one step spin draw process. The present invention relates to a polyester fiber having physical properties comparable to those of the fiber produced by a two step process.

종래에 범용성의 폴리에스테르 섬유를 제조하는 방법중 상기 2단계 공정법(two strop process)은 미연신사(Undrawn Yarn)나 부분배향사(Partially Oriented Yarn)를 먼저 방사공정에서 제조한 다음, 연신공정에서 연신과 열처리를 동시에 실시하여 소정의 물성을 가지는 폴리에스테르 필라멘트사를 제조하는 방법이다.Conventionally, the two strop process of producing polyester fibers of general purpose is to produce undrawn yarn or partially oriented yarn first in a spinning process, and then in the stretching process. Stretching and heat treatment are performed at the same time to produce a polyester filament yarn having a predetermined physical property.

이렇게 제조된 폴리에스테르 필라멘트사는 강도와 신도가 각각 4.5g/d 이상, 30∼40%를 유지하며, 비등수수축율(Boiling Water Shrinkage)이 7∼10%내에 들고 원사의 균제도(Uster Uneveness)도 0.3∼0.6%이므로 품질이 우수하다.The polyester filament yarn thus prepared has a strength and elongation of 4.5 g / d or more and 30 to 40%, respectively, with a boiling water shrinkage of 7 to 10%, and a yarn uneveness of 0.3. As it is -0.6%, the quality is excellent.

그러나 이와 같은 2단계 공정법을 이용할 경우, 공정이 두단계로 나뉘어지므로 설비투자비가 상승하고, 공정의 제조속도도 느리므로 생산성이 낮고 제조원가가 높아지는 단점이 있다.However, when using such a two-step process method, the process is divided into two stages, the equipment investment cost increases, and the manufacturing speed of the process is slow, there is a disadvantage that the productivity is low and the manufacturing cost increases.

이러한 단점을 극복하기 위하여 직접방사연신법(Direct Spin Draw Process)이 개발되었다. 이 공정은 방사와 연신 및 열처리가 모두 같은 장치에서 이루어지게 되므로 1단계의 공정만으로 폴리에스테르 원사를 제조할 수 있다.In order to overcome this drawback, a direct spin draw process has been developed. Since this process is performed in the same apparatus, spinning, drawing, and heat treatment, polyester yarns can be manufactured in only one step.

상기 1단계 공정법은 폴리에스테르 섬유를 1,000∼2,000 m/분의 속도로 방사시킨 다음 온도범위가 70∼120℃의 제1고뎃롤러상에 5∼12회 정도 감아서, 방사된 폴리에스테르 섬유가 연신되기 쉽도록 유리전이온도(Tg) 이상으로 가열시킨다.In the one-step process, the polyester fiber is spun at a speed of 1,000 to 2,000 m / min and then wound about 5 to 12 times on a first gourd roller having a temperature range of 70 to 120 ° C. Heat above glass transition temperature (Tg) to be easily stretched.

이어서 온도가 100∼150℃이고, 속도가 3,000∼5,000 m/분인 제2고뎃롤러에 역시 5∼10회 정도 감아주어서, 연신과 열처리를 동시에 실시한 후 권취기에 3,000∼5000m/분의 속도로 권취하여 폴리에스테르 섬유를 1단계 공정(One Step Process)으로 제조하는 방법이다.Subsequently, a second gourd roller having a temperature of 100 to 150 ° C. and a speed of 3,000 to 5,000 m / min was also wound about 5 to 10 times. It is a method for producing polyester fibers in a one step process.

그러나 상기 1단계 공정법의 직접방사연신법은 제조공정의 특성상 그 최고제조속도가 5,000m/분 이하로 제한을 받게 된다.However, the direct radiation drawing method of the first step process method is limited by the maximum manufacturing speed of 5,000m / min or less due to the nature of the manufacturing process.

그 이유는 속도의 증가에 맞추어 원사의 연신성을 좋게 하고, 균일한 열처리를 실시하기 위하여 제1고뎃롤러와 제2고뎃롤러에 감아주는 권회수를 증가시켜야 하고, 또 고뎃롤러의 온도는 높여야하기 때문에 주행하는 폴리에스테르 섬유가 고온에서 매우 큰 연신 작용을 받게 되고, 그 결과 고뎃롤러상에서 떨림현상이 일어나 폴리에스테르 섬유가 고뎃롤러에 말려서 절사가 많이 일어나고 또 열처리가 불균일하게 되어 염색결점이 많이 발생하게 되거나 급격한 배향결정화로 인한 물성결함 및 사절이 발생하므로 고속방사를 행하는 데 한계가 있게 된다.The reason is that in order to improve the elongation of the yarn in accordance with the increase in speed, and to perform uniform heat treatment, the number of windings to be wound around the first roller and the second roller should be increased, and the temperature of the roller should be increased. As a result, the running polyester fiber is subjected to a very large stretching effect at a high temperature, and as a result, the shaking phenomenon occurs on the high roller, and the polyester fiber is rolled up on the high roller, resulting in a lot of cutting and uneven heat treatment. Or the occurrence of physical defects and trimming due to rapid orientation crystallization, which leads to limitations in performing high-speed spinning.

아울러, 매우 큰 연신작용을 받게 되므로 비등수수축율도 4∼6% 줄어들어서, 제직 및 염색시에 적당한 수축이 일어나지 않게 되므로 최종 제품인 직물의 품위가 떨어져 버린다.In addition, the boiling shrinkage rate is also reduced by 4-6% because it is subjected to a very large stretching action, so that the proper shrinkage does not occur during weaving and dyeing, the quality of the final product fabric is dropped.

따라서 본 발명은 1단계 공정으로 제조된 섬유의 물성이 2단계 공정법으로 제조된 원사와 유사한 물성을 갖는 폴리에스테르 섬유를 제공함을 목적으로 한다.Accordingly, an object of the present invention is to provide a polyester fiber having physical properties similar to that of yarns produced by a two-step process.

종래기술의 문제점을 해결하기 위한 방법으로서 스피너렛(spinneret)과 와인더(winder) 사이에 Tg 이상, 융점이하의 온도로 열처리시스템을 적용한다.As a method for solving the problems of the prior art, a heat treatment system is applied at a temperature above Tg and below the melting point between the spinneret and the winder.

이렇게 열처리 존(zone)을 거쳐 고속방사된 섬유의 경우에는 열처리하지 않고 고속방사하는 경우의 문제점인 무정형영역 저배향의 문제점, 즉 수축율이 낮아지는 문제점이 해결된다.In the case of the high-speed spinning fibers through the heat treatment zone (zone), the problem of low orientation of the amorphous region, that is, the problem of high-speed spinning without heat treatment, that is, the problem that the shrinkage is reduced.

즉, 일단계공정에서 방사속도 5,000 mpm 이상으로 고속방사할 경우에는 충분히 분자쇄가 이완할 시간 및 분자유동을 갖고 있기 때문에 원사의 수축율을 좌우하는 무정형 영역이 잘 배향되지 않는다.That is, in the one-step process, when spinning at 5,000 mpm or more, the amorphous region that determines the shrinkage of the yarn is not oriented because the molecular chain has sufficient time and molecular flow to relax.

이처럼 무정형 영역이 잘 배향되지 않을 경우는 수축율이 낮게 되어 일반 원사와 같은 정도의 수축율을 갖는 원사를 얻기 어렵다.In this case, when the amorphous region is not oriented well, the shrinkage rate is low, and it is difficult to obtain a yarn having the same shrinkage rate as that of ordinary yarns.

그러므로 일반사 정도의 수축율을 갖기 위해 스피너렛과 와인더 사이에 Tg 이상, 융점이하의 온도로 열처리하는 열처리시스템을 적용한다. 이처럼 열처리시스템을 적용하면 수축율과 관계있는 무정형 영역이 충분히 배향될 수 있는 분자유동을 부여하기 때문에 고속으로 방사하여도 무정형 영역이 충분히 배향되어 일반사 정도의 수축율을 갖는 원사를 제조할 수 있다.Therefore, in order to have the shrinkage of general yarns, a heat treatment system is applied between the spinneret and the winder at a temperature above Tg and below the melting point. In this way, the application of the heat treatment system provides a molecular flow in which the amorphous region related to the shrinkage ratio can be sufficiently oriented, so that even when spun at high speed, the amorphous region is sufficiently oriented to produce a yarn having a shrinkage of general yarns.

이렇게 열처리 과정을 통해 고속방사된 섬유는 특이한 tanδ피크를 갖는다. 유리전이온도에서 1차 전이를 나타내는 α-피크와 그 보다 저온에서 2차 전이를 나타내는 β-피크가 발현되며 α-피크와 β-피크의 사이온도에서 β-피크의 어깨(shoulder)라 할 수 있는 β'-피크를 발현한다.The fiber spun at high speed through the heat treatment process has an unusual tan δ peak. Α-peak, which represents the primary transition at the glass transition temperature, and β-peak, which represents the secondary transition at lower temperatures, are expressed, and it is the shoulder of the β-peak at the temperature between the α-peak and the β-peak. Expressing β′-peak.

tanδ는 내부마찰(internal friction) 혹은 제동(damping)을 나타내며 손실정접(loss tangent)이라 일컬어지고, 그 값은 레오바이브론(Rheovibron)기기 등을 이용해 측정할 수 있다.tan δ represents internal friction or damping and is referred to as loss tangent, and its value can be measured using a Leovibron device or the like.

tanδ 플롯(plot)에서 일차전이를 나타내는 α-피크는 무정형영역의 운동이 활발해지는 유리전이온도 영역에서 발생한다. 또 2차 전이를 위해 나타내는 β-피크는 측쇄운동이나 국소 세그멘트의 운동에 기인한 것으로서 유리전이온도보다 훨씬 낮은 온도에서 발생한다. 일반적인 방법으로 제조된 섬유는 위에서 말한 α,β-피크 이외에는 다른 피크의 발현이 어렵다.The α-peak, which represents the first transition in the tanδ plot, occurs in the glass transition temperature region where the movement of the amorphous region becomes active. In addition, β-peak for secondary transition is caused by side chain movement or local segment movement and occurs at much lower temperature than glass transition temperature. Fibers produced by the general method are difficult to express other peaks than the above-mentioned α, β-peak.

그러나 본 발명에서와 같이 열처리과정을 거쳐 고속방사 방식으로 제조된 섬유는 α,β-피크 이외의 β'-피크의 발현을 특징으로 한다. β'-피크는 β-피크의 약간 오른쪽 어깨부위의 온도에서 발현된다. 그 양상은 제1도를 참고한다.However, the fiber produced by the high-speed spinning method through the heat treatment process as in the present invention is characterized by the expression of β'-peak other than α, β-peak. β-peak is expressed at the temperature of the slightly right shoulder region of β-peak. See Figure 1 for that aspect.

본 발명의 효과는 다음과 같다.The effects of the present invention are as follows.

β'-피크는 배향된 무정영역에서 국소 세그멘트 운동으로 추정된다. 이는 무배향 무정영역과는 다른 구조로서 무배향 무정영역과 결정영역의 중간상으로서 제3상으로 일컬어질 수 있다. 고분자 불질이 β'-피크를 발현하는 경우에 그렇지 않은 경우보다 물성이 더 좋아진다. 왜냐하면 방사된 원사를 후가공하는 과정에서 열처리를 하게 되면 이때 배향되어 있던 무정영역이 결정으로의 전이가 쉽게 일어난다.β'-peak is estimated as local segment motion in the oriented amorphous region. This structure is different from the non-oriented amorphous region and may be referred to as a third phase as an intermediate phase between the non-oriented amorphous region and the crystal region. If the polymer defect expresses β'-peak, the physical properties are better than otherwise. Because heat treatment is performed in the process of post-processing the spun yarn, the amorphous region oriented at this time easily transitions to the crystal.

또한 무정영역이 배향이 잘 되어 있다는 것을 나타내므로 수축율이 7∼10% 정도로 정규 폴리에스테르사와 유사하게 된다. 이는 일반적인 원스텝(one step)방사를 고속화하는 경우에 발생할 수 있는 물성결함이 열처리시스템을 도입함으로써 해결될 수 있고 더욱이 방속의 증가로 인한 생산성의 향상을 가져온다.In addition, since the amorphous region is well-oriented, the shrinkage ratio is about 7 to 10%, which is similar to that of a normal polyester yarn. This can be solved by introducing a heat treatment system, which can be solved when the general one-step radiation is accelerated, and furthermore, productivity is increased due to the increase in the speed of discharge.

이렇게 제조된 원사의 각 피크의 발현온도와 그 때의 tanδ 값은 다음과 같은 범위를 만족한다.The expression temperature of each peak and thus the tan δ value of the yarn thus prepared satisfy the following ranges.

측정주파수 110Hz에서 tanδ 값이 다음과 같은 온도범위에서 피크를 발현한다.At the measurement frequency 110Hz, the tanδ value shows a peak in the following temperature range.

측정주파수 110Hz에서 각 피크의 tanδ 값은 다음과 같은 범위를 갖는다.At the measurement frequency 110Hz, the tanδ value of each peak has the following range.

이처럼 고속방사한 원사의 물성이 상기 값을 동시에 만족하지 않으면 무정형 영역이 충분히 배향되어 있지 않다는 것을 의미하며 이는 고속으로 방사하지 않은 정규사와 다른 물성을 갖는다는 것을 의미한다.If the properties of the yarn spun at high speed do not satisfy the above values at the same time, it means that the amorphous region is not sufficiently oriented, which means that it has different properties from the normal yarn not spun at high speed.

그러므로 생산성을 높이기 위해 방사속도를 높이게 되면 물성상에 변동이 생기게 되므로 물성변동이 없이 생산성을 높이기 위해서는 상기 물성을 동시에 만족하는 원사를 제조해야 한다.Therefore, if the spinning speed is increased to increase the productivity, there is a change in the physical properties, so in order to increase the productivity without changing the physical properties, it is necessary to manufacture a yarn satisfying the above properties at the same time.

또한 상기 물성의 범위를 어느 하나라도 벗어날 경우는 결정형성이 미약하거나 배향이 미약한 상태를 갖게 되어 고속방사하지 않은 원사의 물성과 상이하게 된다.In addition, if any of the range of the physical properties is out of the state of the crystal formation is weak or the orientation is weak is different from the physical properties of the yarn that is not high-speed spinning.

이하, 실시예를 통하여 본 발명을 더욱 구체적으로 설명하겠는 바, 본 발명이 실시예로 인하여 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the Examples.

[실시예1]Example 1

고유점도 0.6의 폴리에틸렌테레프탈레이트 폴리머를 290℃의 방사팩으로 방사속도 5,000mpm으로 방사하고 냉각한 후 열처리시스템에서 140℃으로 열처리한 후 제1고뎃롤러와 제2고뎃롤러에서 안정화 시키고 4,800mpm으로 권취하여 제조하였다.The polyethylene terephthalate polymer with an intrinsic viscosity of 0.6 was spun at a spinning speed of 5,000 mpm with a spin pack at 290 ° C, cooled, and then heat treated at 140 ° C in a heat treatment system. Was prepared.

이렇게 하여 제조된 원사의 물성을 측정, 표에 나타내었다.The physical properties of the yarn thus produced were measured and shown in the table.

[실시예 2∼7]EXAMPLES 2-7

실시예1과 동일하게 제조하되 방사속도 및 열처리온도를 표와 같이 변경하여 제조하였다.Prepared in the same manner as in Example 1, but prepared by changing the spinning speed and heat treatment temperature as shown in the table.

[비교예 1∼5]Comparative Examples 1 to 5

실시예1과 동일하게 제조하되 방사속도를 표와 같이 변경하여 제조하였으며 열처리를 행하지 않았다.Prepared in the same manner as in Example 1, but prepared by changing the spinning speed as shown in the table and did not perform a heat treatment.

Claims (3)

측정주파수 110Hz에서 1차 전이피크온도(α-peak, Tα)가 120∼150℃, 2차 전이피크온도(β-peak, Tβ)가 -50∼20℃, β-피크의 우측어깨피크온도(β'-peak, Tβ')가 Tβ∼0.2Tα범위이고, α-피크의 tanδ(tanδα)이 0.10∼0.25, β-피크의 tanδ값(tanδβ)이 0.03∼0.10, β'-피크의 tanδ값의 2배수(2tanδβ')가 tanδβ∼tanδα범위임을 특징으로 하는 폴리에스테르 섬유.The first transition peak temperature (α-peak, T α ) is 120 ~ 150 ℃, the second transition peak temperature (β-peak, T β ) is -50 ~ 20 ℃ at the measurement frequency 110Hz, and the right shoulder peak of β-peak The temperature (β'-peak, T β ' ) ranges from T β to 0.2T α , the tanδ (tanδ α ) of α -peak is 0.10 to 0.25, the tanδ value of tan peak (tanδ β ) is 0.03 to 0.10, 2 multiple of the value of the tanδ peak β'- (2tanδ β ') is a polyester fiber, it characterized in that the tanδ β ~tanδ α range. 폴리에스테르 섬유의 제조에 있어서, 폴리에스테르 폴리머를 고속방사후 스피너렛(Spinneret)과 와인더(Winder) 사이에서 유리전이 온도 이상, 융점이하의 온도로 열처리하는 것을 포함하는 특징으로 하는 폴리에스테르 섬유의 제조방법.In the production of polyester fibers, the polyester polymer is characterized by comprising heat treatment of the polyester polymer after the high-speed spinning at a temperature above the glass transition temperature, below the melting point between the spinneret and the winder (Winder) Manufacturing method. 제2항에 있어서, 방사속도를 5,000m/분 이상으로 함을 특징으로 하는 폴리에스테르 섬유의 제조방법.The method for producing a polyester fiber according to claim 2, wherein the spinning speed is 5,000 m / min or more.
KR1019950061200A 1995-12-28 1995-12-28 Polyester fiber KR0146570B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101721384B1 (en) * 2016-09-27 2017-03-29 손승근 High elasticity polyester composite yarn having antibacterial activity from natural extract, and preparation method of fabric using the same
KR101721385B1 (en) * 2016-09-27 2017-03-29 손승근 High elastic polyester composite yarn having antibacterial activity and preparation method of fabric using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101721384B1 (en) * 2016-09-27 2017-03-29 손승근 High elasticity polyester composite yarn having antibacterial activity from natural extract, and preparation method of fabric using the same
KR101721385B1 (en) * 2016-09-27 2017-03-29 손승근 High elastic polyester composite yarn having antibacterial activity and preparation method of fabric using the same

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