KR100522897B1 - Manufacturing method of polyester fiber for high gloss sewing - Google Patents
Manufacturing method of polyester fiber for high gloss sewing Download PDFInfo
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- KR100522897B1 KR100522897B1 KR1019980038819A KR19980038819A KR100522897B1 KR 100522897 B1 KR100522897 B1 KR 100522897B1 KR 1019980038819 A KR1019980038819 A KR 1019980038819A KR 19980038819 A KR19980038819 A KR 19980038819A KR 100522897 B1 KR100522897 B1 KR 100522897B1
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- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
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- 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
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
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- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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Abstract
본 발명은 고광택의 재봉사용 폴리에스테르 섬유의 제조방법에 관한 것으로, 테레프탈산과 에틸렌글리콜을 주된 원료로 하는 폴리에스테르 섬유를 제조함에 있어서, 중축합반응 초기에 입자의 크기가 16∼150㎚인 하기 일반식의 금속화합물의 1종 또는 2종 이상을 생성 폴리머에 대하여 0.005∼0.10중량%를 첨가하고, 산화실리콘과 혼합한후 폴리머를 방사하는 과정에서 다수개의 캡스탄롤러의 직경변화에 따라 섬유의 장력을 조절하여 슬립발생을 방지하는 방사성과 연신성이 뛰어난 고광택 재봉사용 폴리에스테르 섬유의 제조방법The present invention relates to a method for producing a high-gloss sewing polyester fiber, in the production of polyester fibers containing terephthalic acid and ethylene glycol as the main raw material, the particle size is 16 to 150nm at the beginning of the polycondensation reaction Tension of the fiber according to the change of the diameter of the plurality of capstan rollers in the process of spinning the polymer after adding 0.005 to 0.10% by weight to the polymer produced by producing one or two or more kinds of the metal compounds of the formula. Method of manufacturing polyester fibers for high gloss sewing with excellent spinning and stretching properties to prevent slip
M-X ................. 일반식M-X .....
(상기식중 M은 주기율표 ⅡA, ⅢB, ⅣB의 원소이며, X는 SO4, CO3이다.)(Wherein M is an element of Periodic Tables IIA, IIIB, and IVB, and X is SO 4 , CO 3 ).
Description
본 발명은 고광택 재봉사용 폴리에스테르 섬유의 제조방법에 관한 것으로서, 특히 제면과정중 뛰어난 방사성과 연신성을 가짐과 동시에 광택성이 우수한 재봉사 용 폴리에스테르 섬유의 제조방법에 관한 것이다.The present invention relates to a method for producing a polyester fiber for sewing with high gloss, and more particularly to a method for producing a polyester fiber for sewing yarn having excellent glossiness while having excellent spinning and stretching properties during the noodle making process.
일반적으로 테레프탈산과 에틸렌 글리콜을 주원료로하여 재봉사용 폴리에스테르 섬유를 제조함에 있어서, 소광제로 쓰이는 이산화 티탄은 방사와 연신작업성을 향상시키게 되나, 고광택의 폴리에스테르 재봉사를 제조하는데는 그 첨가가 필요없게 되므로 방사와 연신제조공정에 있어서 여러 가지 품질상의 문제를 야기 시켜왔다. 특히 방사, 연신 공정에서 사의 가닥수가 많은 제면공정에서 화이바와 롤러의 마찰 또는 화이바(FIBER)와 화이바의 마찰로 인해 섬유의 데니어(Denier)와 단면 변동율이 심하게 변하여(슬립현상에 의함) 연신공정에서 부분적인 미연신부가 발생되어 신도와 염색불균일등 치명적인 결함이 발생되어 왔다.Generally, in manufacturing polyester fibers for sewing using terephthalic acid and ethylene glycol as main ingredients, titanium dioxide, which is used as a matting agent, improves spinning and drawing work, but does not need to be added to prepare a high-gloss polyester sewing thread. Therefore, it has caused various quality problems in spinning and stretching manufacturing process. In particular, in the spinning and drawing process, the denier and cross-sectional variation of fibers are severely changed (due to the slip phenomenon) due to the friction between fibers and rollers or the friction between fibers and rollers. Partial unstretched areas have been developed, resulting in fatal defects such as elongation and uneven dyeing.
종래에 일반적으로 사용하는 중합촉매 존재하에서 테레프탈산과 에틸렌 글리콜을 반응시켜 섬유를 제조하거나, 또는 산화실리콘을 소량 첨가하여 일반적인 방법으로 섬유를 제조하는 방법은 필라멘트 제조에는 큰 어려움이 없으나, 제면공정에서는 앞에서 언급한 바와같이 섬유의 데니어와 단면변동이 심하여 방사시 캡스탄 롤러의 설비 개조 없이는 소기의 목적을 달성할 수 없었다. In the presence of a polymerization catalyst generally used in the prior art, a fiber is prepared by reacting terephthalic acid and ethylene glycol, or a fiber is prepared in a general manner by adding a small amount of silicon oxide. As mentioned, the denier and cross-sectional variation of the fibers were so great that the desired purpose could not be achieved without retrofitting the capstan roller during spinning.
종래에 고강력 전신도의 폴리에스테르 단섬유를 제조하기 위하여 미연신사를 온도와 연신배율을 다단으로 변경하는 방법이 우리나라 특허 공고번호 제89-1836호에서 제안되고 있으나, 온도에 의한 조절은 화이바의 데니어가 높은 단섬유에서는 슬립에 의해 부분 미연신사를 발생시킬 가능성이 높아 실제 제조에는 한계가 있다.Conventionally, in order to manufacture polyester short fibers of high strength whole body diagram, a method of changing the unstretched yarn to multiple stages in temperature and draw ratio has been proposed in Korean Patent Publication No. 89-1836, but the control by temperature is In short fibers with a high denier, there is a high possibility of generating partial undrawn yarn due to slip, and thus there is a limit in actual manufacturing.
또한, 우리나라 특허공개 제93-012870호에서는 고강도 고광택 섬유를 형성하기 위해 금속화합물과 산화실리콘을 생성폴리머에 대해 일정량 첨가하여 생성된 폴리머로 고강도 섬유를 얻고 있으나, 이 방법 또한 미연신 토우의 섬도가 높은 제면공정에서는 슬립현상에 의한 섬도변화에 의해 연신공정에서 미연신사가 발생되므로 균일 염색성을 얻는데는 한계가 있다.In addition, Korean Patent Publication No. 93-012870 obtains a high strength fiber as a polymer produced by adding a certain amount of a metal compound and silicon oxide to a produced polymer to form a high strength high gloss fiber, but this method also has a fineness of unstretched tow. In the high noodle process, undrawn yarn is generated in the stretching process due to the change of the fineness due to the slip phenomenon, so there is a limit in obtaining uniform dyeing property.
본 발명은 상기와 같은 문제점을 해결하기 위한 것으로서, 본 발명의 목적은 The present invention is to solve the above problems, the object of the present invention is
중합공정에서 입자를 첨가하고, 방사공정에서 캡스탄 롤러의 장력을 조절하여 방사공정에서 슬립발생을 방지함으로써 섬도가 균일하고 연신성이 우수한 고광택 재봉사용 폴리에스테르 섬유를 얻는 것을 그 목적으로 한다.The purpose of the present invention is to obtain high gloss sewing polyester fibers with uniform fineness and excellent stretchability by adding particles in the polymerization process and adjusting the tension of the capstan roller in the spinning process to prevent slip in the spinning process.
또한, 본 발명의 다른 목적은 방사와 연신의 주행속도를 높여서 섬유제조과정의 고정비를 줄여 원가를 절감 하는데 있다.In addition, another object of the present invention is to reduce the fixed cost of the fiber manufacturing process by increasing the running speed of spinning and stretching to reduce the cost.
이에 본 발명자들은 상기의 목적을 달성하기 위해 테레프탈산과 에틸렌글리콜을 주원료로 하는 고광택 재봉사용 폴리에스테르 섬유를 제조하는데 있어서, 중합반응 초기에 입자크기가 16∼150nm의 범위를 가지며, 아래 일반식으로 표시되는 금속화합물의 1종 또는 2종 이상을 생성폴리머에 대하여 0.005∼0.10중량%를 첨가하고 산화 실리콘과 혼합한 후, 폴리머를 방사하는 과정에서 캡스탄 내에서의 롤러 직경 변화에 따라 섬유의 장력을 조절하여 방사성과 연신성이 우수한 고광택 재봉사용 폴리에스테르 섬유를 얻게된다.In order to achieve the above object, the present inventors have prepared a polyester fiber for sewing high-gloss sewing materials based on terephthalic acid and ethylene glycol, and has a particle size ranging from 16 to 150 nm at the beginning of the polymerization reaction, and is represented by the following general formula. One or two or more kinds of metal compounds are added in an amount of 0.005 to 0.10% by weight based on the resulting polymer, mixed with silicon oxide, and the tension of the fiber is changed according to the roller diameter change in the capstan during the spinning of the polymer. Adjusting to obtain a high-gloss sewing polyester fiber excellent in spinning and stretching.
M-X ................일반식M-X ................ General formula
(상기식중 M은 주기율표 ⅡA, ⅢB, ⅣB의 원소이며, X는 SO4, CO3이다.)(Wherein M is an element of Periodic Tables IIA, IIIB, and IVB, and X is SO 4 , CO 3 ).
이하 본 발명을 첨부도면에 의해 상세하게 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 사용되는 캡스탄 롤러의 공정 개략도이고, 도 2는 캡스탄 롤러의 직경변화에 따르는 장력변화 및 섬도를 나타내는 그래프로서, 섬유의 슬립이 없고, 섬도가 균일하기 위해서는 중합공정에서 마찰계수를 낮추는 미세 입자의 첨가가 필요하다. 입자를 첨가 사용하지 않고 제조하는 종래의 기술들이 많이 있으나, 이러한 방법은 섬도가 낮은 제사공정에서는 가능하나 제면과 같이 화이버끼리의 마찰이 많은 공정에서는 소기의 목적을 달성할 수 없을뿐 아니라, 방사속도를 높일 수 없는 단점이 있다. 따라서 본 발명에서는 중합공정에서 상기 일반식으로 표시되는 첨가제를 생성 폴리머에 대해 0.005∼0.10중량%를 첨가하였는데, 첨가량이 0.005중량% 이하이면 효과가 적고 0.10중량% 이상이면 헤이즈가 높아져서 투명성이 저하되고 중합공정에서 입자응집이 발생하여 방사의 팩압이 급격히 상승하는 문제점이 있다.1 is a process schematic diagram of the capstan roller used in the present invention, Figure 2 is a graph showing the tension change and the fineness according to the diameter change of the capstan roller, there is no slip of the fiber, in order to have a fineness in the polymerization process The addition of fine particles that lowers the coefficient of friction is necessary. Although there are many conventional techniques for manufacturing without the addition of particles, such a method is possible in the spinning process with low fineness, but in a process with high friction between fibers such as noodle, the desired purpose is not achieved, and the spinning speed There is a disadvantage that can not increase. Therefore, in the present invention, the additive represented by the above general formula in the polymerization step was added 0.005 to 0.10% by weight relative to the resulting polymer, but if the amount is 0.005% by weight or less, the effect is low, and if the content is 0.10% by weight or more, the haze becomes high and transparency is lowered. Particle agglomeration occurs in the polymerization process, and there is a problem in that the pack pressure of spinning is rapidly increased.
중축합 반응은 270∼295℃ 범위에서 통상적인 방법으로 실시하였으며, 얻어진 중합체의 극한점도는 오르토클로로 페놀 용매에 용해한 후 오스트발드 점도계로 The polycondensation reaction was carried out by a conventional method in the range of 270 to 295 ° C., and the ultimate viscosity of the obtained polymer was dissolved in an orthochloro phenol solvent, followed by the Ostwald viscometer.
25℃에서 측정하였다.Measured at 25 ° C.
또한 폴리머의 투명성은 용액 헤이즈(HAZE)로 나타내는데 그 방법은 페놀/테트라클로로에탄(60/40 중량비) 혼합용액에 120℃로 용해시킨 후 헤이즈 측정기로 상온에서 측정하였다.In addition, the transparency of the polymer is expressed as a solution haze (HAZE) method was dissolved at 120 ℃ in a phenol / tetrachloroethane (60/40 weight ratio) mixed solution was measured at room temperature with a haze meter.
도 1에서 캡스탄 롤러의 직경설계는 제1롤러에서부터 제6롤러까지의 각 단계를 균일하게 증가시키는 것이 좋다. 또한 각 롤러의 직경 증가율은 최대 2.0%를 넘지 않게 설계하는 것이 바람직하다. 직경증가율이 2.0%를 초과하는 경우에는 롤러간의 장력 증가로 인하여 부분적인 연신이 일어나 연신공정에서 미연신사(U/Y)를 발생시키는 원인이 된다.The diameter design of the capstan roller in FIG. 1 preferably increases uniformly each step from the first roller to the sixth roller. In addition, the diameter increase rate of each roller is preferably designed not to exceed the maximum 2.0%. When the diameter increase rate exceeds 2.0%, partial stretching occurs due to an increase in tension between rollers, which causes undrawn yarn (U / Y) in the stretching process.
또한 방사시 캡스탄 롤러의 직경 토탈증가율(A)과 섬유의 장력증가율(B)이 1∼50의 범위인 경우, 방사에 따르는 미연신 토우의 편차가 없고 연신성이 균일하여 저신도 제조가 가능한 고광택사를 제조할 수 있다. In addition, when the total diameter increase rate (A) of the capstan roller and the fiber increase rate (B) of the fiber during the spinning are in the range of 1 to 50, there is no deviation of the unstretched toe due to spinning, and the elongation is uniform, so that low elongation can be produced. High gloss yarns can be produced.
본 발명의 방사연신공정에서의 각각의 성질 및 제반 물성의 측정은 하기와 같은 방법으로 측정하였다.Measurement of each property and physical properties in the radial drawing step of the present invention was measured by the following method.
(1) 강,신도는 인장시험기(인스트롱사 제작)로 시료를 200m/분의 인장속도로 절단점까지 신장할때의 절단강력(g)을 측정한 다음 이 강력을 총 섬도로 나누어 절단강도를 구한다. 또한 절단점까지 신장한 원사의 길이에 대해 신도(%)를 구한다. (1) The strength and elongation is measured by the tensile tester (manufactured by Instron Co., Ltd.) and measuring the cutting force (g) when the sample is stretched to the cutting point at a tensile speed of 200 m / min. Obtain In addition, the elongation (%) is obtained for the length of the yarn stretched to the cutting point.
(2) 방사한 미연신 토우의 섬도변화 여부는 한추를 기준으로 측정하였으며, 섬도의 변화는 ±%로 나타내었다.(2) The degree of fineness of the unstretched tow was measured on the basis of the pendulum, and the degree of fineness was expressed as ±%.
이하 실시예와 비교실시예를 들어 본 발명을 상세히 설명하면 다음과 같다. Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples.
실시예 1Example 1
테레프탈산 1729㎏, 에틸렌글리콜 774㎏을 직접 에스테르화한 다음 반응율이 97.5% 되는 시점에서 중축합반응기에 이행시키고 이행된 반응물에 인산 300g을 투입한 다음 5분 후에 삼산화안티몬 600g, 코발트아세테이트 200g과 입자 첨가제로 1729 kg terephthalic acid and 774 kg ethylene glycol were directly esterified and then transferred to a polycondensation reactor at a reaction rate of 97.5%. 300 g of phosphoric acid was added to the reacted reactants, and after 5 minutes, 600 g of antimony trioxide, 200 g of cobalt acetate and particle additives were added. in
BaSO4 2㎏ 및 SiO2 1㎏을 첨가하여 50분간에 걸쳐 서서히 감압을 걸면서 승온하여 최종 중합종료온도를 288℃로 하였다. 중축합 반응시간은 170분이었으며 그때의 압력은 0.6토르이었다. 여기서 얻은 폴리머는 극한점도[η]가 0.652, 헤이즈는 4.0으로 양호하였다.2 kg of BaSO 4 and 1 kg of SiO 2 were added, and the temperature was gradually increased while gradually reducing the pressure over 50 minutes to obtain a final polymerization termination temperature of 288 ° C. The polycondensation reaction time was 170 minutes and the pressure was 0.6 Torr. The polymer obtained here had an intrinsic viscosity [?] Of 0.652 and a haze of 4.0.
동일한 방법으로 제조한 폴리머 6000㎏을 280℃에서 1500m/분 속도로 용융 방사하였는데, 이때 캡스탄 롤러의 직경증가율은 토탈 0.5%로 결정하여 방사하였다. 방사한 결과 미연신 토우의 섬도변동은 +0.2%로 양호하였으며, 미연신사는 24시간 숙성시킨후 연신, 열처리, 절단과정을 거쳐 1.2데니어 38㎜의 스테이플 화아버를 제조하였다. 얻어진 섬유의 물성은 강도 7.2g/d,신도 20% 이었으며 그 결과를 표 1에 나타내었다.6000 kg of the polymer prepared by the same method was melt spun at 280 ° C. at a rate of 1500 m / min, wherein the rate of increase of the diameter of the capstan roller was determined to be total 0.5% and spun. As a result of the spinning, the fineness variation of the undrawn tow was good at + 0.2%, and the unstretched yarn was aged for 24 hours to produce 1.2 denier 38 mm staple arbors after stretching, heat treatment, and cutting. Physical properties of the obtained fiber was 7.2g / d, elongation 20% and the results are shown in Table 1.
실시예 2Example 2
실시예 1에서 입자 첨가제로 BaSO4 3㎏ 투입하는것 이외에는 동일한 방법으로 중축합반응을 실시하였다. 얻은 폴리머는 극한점도[η]가 0.652, 헤이즈는 4.5로 양호하였다. 방사, 연신은 실시예 1과 동일한 방법으로 실시하여 그 결과를 표 1에 나타내었다.The polycondensation reaction was carried out in the same manner as in Example 1 except that 3kg of BaSO 4 was added as the particle additive. The obtained polymer had good intrinsic viscosity [?] Of 0.652 and haze of 4.5. Spinning and stretching were carried out in the same manner as in Example 1, the results are shown in Table 1.
실시예 3Example 3
실시예 1에서 BaSO4는 투입하지 않고, SiO2 3㎏를 투입하는것 이외에는 동일한 방법으로 중축합 반응을 실시하였다. 얻은 폴리머의 극한점도[η]는 0.651, 헤이즈는 5.5로 양호하였다. 방사, 연신은 실시예 1과 동일한 방법으로 실시하여 그 결과를 표 1에 나타내었다.BaSO 4 was not added in Example 1, and polycondensation reaction was performed in the same manner except adding 3 kg of SiO 2 . Intrinsic viscosity [eta] of the obtained polymer was 0.651, and haze was 5.5 that was favorable. Spinning and stretching were carried out in the same manner as in Example 1, the results are shown in Table 1.
비교실시예 1Comparative Example 1
실시예 1과 동일한 방법으로 중합을 실시하였으며, 방사공정에서 캡스탄 롤러의 직경증가율은 토탈 0.15%로 실시한것 이외에는 실시예 1과 동일한 방법으로 실시하여 그 결과를 표 1에 나타내었다. The polymerization was carried out in the same manner as in Example 1, the diameter increase rate of the capstan roller in the spinning process was carried out in the same manner as in Example 1 except that the total growth rate was 0.15%, and the results are shown in Table 1.
비교실시예 2Comparative Example 2
실시예 3에서 SiO2의 입자크기를 150nm로 변경하여 실시한것 이외에는 실시예 3과 동일한 방법으로 실시하여 그 결과를 표 1에 나타내었다.Example 3 was carried out in the same manner as in Example 3, except that the particle size of SiO 2 was changed to 150 nm, and the results are shown in Table 1.
표 1Table 1
본 발명은 중합공정에서 광택 성을 저하시키지 않는 입자를 사용하고 이에 따른 방사공정에서 섬도의 변화가 없도록 섬유장력을 조절함으로써 고광택성과 저신도의 균일한 폴리에스테르 섬유를 얻을수 있게 된다.In the present invention, it is possible to obtain uniform polyester fibers of high gloss and low elongation by using particles which do not degrade glossiness in the polymerization process and controlling fiber tension so that there is no change in fineness in the spinning process.
도 1은 본 발명에 사용되는 캡스탄 롤러의 공정 개략도,1 is a process schematic diagram of a capstan roller used in the present invention,
도 2는 캡스탄 롤러의 직경증가율과 섬도, 장력변화에 관한 상관관계를 나타내는 그래프이다.2 is a graph showing the correlation between the diameter increase rate, the fineness, and the tension change of the capstan roller.
〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>
1 : 캡스탄 제1롤러 2 : 캡스탄 제2롤러1: capstan first roller 2: capstan second roller
3 : 캡스탄 제3롤러 4 : 캡스탄 제4롤러3: capstan third roller 4: capstan fourth roller
5 : 캡스탄 제5롤러 6 : 캡스탄 제6롤러5: capstan fifth roller 6: capstan sixth roller
7 : 기어 휠 8 : 미연신토우 수납통 7: gear wheel 8: unexpanded tow storage
9 : 미연신토우 9: unstretched tow
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| KR1019980038819A KR100522897B1 (en) | 1998-09-19 | 1998-09-19 | Manufacturing method of polyester fiber for high gloss sewing |
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| KR100522897B1 true KR100522897B1 (en) | 2006-01-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR850000848A (en) * | 1983-07-27 | 1985-03-09 | 유진 에스 짐머 | Advanced Digital PSK Modulator for Modems |
| KR900001945A (en) * | 1988-07-21 | 1990-02-27 | 서경석 | Electronic door key control circuit |
| KR930012870A (en) * | 1991-12-16 | 1993-07-21 | 하기주 | Method for producing high strength, high-gloss fiber-forming polyester |
| KR980009570A (en) * | 1996-07-15 | 1998-04-30 | 김상응 | A method for producing a highly absorbent polyester fabric excellent in feel and feel |
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1998
- 1998-09-19 KR KR1019980038819A patent/KR100522897B1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR850000848A (en) * | 1983-07-27 | 1985-03-09 | 유진 에스 짐머 | Advanced Digital PSK Modulator for Modems |
| KR900001945A (en) * | 1988-07-21 | 1990-02-27 | 서경석 | Electronic door key control circuit |
| KR930012870A (en) * | 1991-12-16 | 1993-07-21 | 하기주 | Method for producing high strength, high-gloss fiber-forming polyester |
| KR980009570A (en) * | 1996-07-15 | 1998-04-30 | 김상응 | A method for producing a highly absorbent polyester fabric excellent in feel and feel |
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