• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 1998년도 가을 학술발표회논문집
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• pp.402-405
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• 1998

Among the production technologies of nonwoven fabrics, a needle punching technique has one of the long history aid holds still important place. At the present time, it is used not only for scrimming with woven or knitted fabrics and other nonwoven fabrics, but also for applying the special fibers blending nonwovens at the web forming process in ender to manufacture economical and high value added-Products such as home furnishing industrial and technical purpose. (omitted)

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2001년도 가을 학술발표회 논문집
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• pp.436-436
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• 2001

최근 섬유 제품이 다양화됨에 따라 단일섬유로 된 제품보다는 두 개 이상의 원사를 혼합하여 제조하는 혼섬사의 개발이 주를 이루고 있다. 이러한 복합섬유는 단독 섬유 제품의 결점을 보완하여 새로운 감촉과 색상을 얻기 위하여 실시하기도 하고 제품의 강도를 보완하고 단가를 맞추기 위하여 생산되기도 한다. (중략)

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2001년도 가을 학술발표회 논문집
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• pp.456-458
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• 2001

PBT는 엔지니어링 플라스틱용으로 전기ㆍ전자부품, 자동차부품에 주로 사용되며 이 두 종의 용도로 약 80％정도 소비된다. 섬유로 사용하는 것은 매우 소량이다. PBT섬유는 가연가공하여 주로 사용되며 스트레치 가공사로 되었을 때 중요한 특징은 권축의 신장회복성이 PET 및 나일론 6 섬유보다 아주 우수하다는 것이다. (중략)

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2001년도 가을 학술발표회 논문집
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• pp.283-286
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• 2001

For the common drier and heaters, the heat gradually transfers from exterior to interior in the materials, as it generally adopts radiant or/and convection heat. However, by using microwave, both the interior and exterior of fiber materials can be evenly heated simultaneously. (omitted)

• 한국의류학회지
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• 제38권3호
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• pp.372-385
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• 2014

Lignin is an abundant natural polymer in the biosphere and second only to cellulose; however, it is under-utilized and considered a waste. In this study, lignin was fabricated into nanofibers via electrospinning. The critical parameters that affected the electrospinnability and morphology of the resulting fibers were examined with the aim to utilize lignin as a resource for a new textile material. Poly(vinyl alcohol) (PVA) was added as a carrier polymer to facilitate the fiber formation of lignin, and the electrospun fibers were deposited on polyester (PET) nonwoven substrate. Eleven lignin/PVA hybrid solutions with a different lignin to PVA mass ratio were prepared and then electrospun to find an optimum concentration. Lignin nano-fibers were electrospun under a variety of conditions such as various feed rates, needle gauges, electric voltage, and tip-to-collector distances in order to find an optimum spinning condition. We found that the optimum concentration for electrospinning was a 5wt% PVA precursor solution upon the addition of lignin with the mass ratio of PVA:lignin=1:5.6. The viscosity of the lignin/PVA hybrid solution was determined as an important parameter that affected the electrospinning process; in addition, the interrelation between the viscosity of hybrid solution and the electrospinnability was examined. The solution viscosity increased with lignin loading, but exhibited a shear thinning behavior beyond a certain concentration that resulted in needle clogging. A steep increase in viscosity was also noted when the electrospun system started to form fibers. Consequently, the viscosity range to produce bead-free lignin nanofibers was revealed. The energy dispersive X-ray analysis confirmed that lignin remained after being transformed into nanofibers. The results indicate the possibility of developing a new fiber material that utilizes biomass with resulting fibers that can be applied to various applications such as filtration to wound dressing.

• 한국염색가공학회지
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• 제33권2호
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• pp.87-95
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• 2021

In this study, the application of a medical compression sleeve of Moisture Responded Transformable(MRT) fibers to the treatment of lymphedema after surgery in breast cancer patients was investigated. MRT fibers were manufactured with PET and Nylon6 bi-component cross-section yarns, and compression sleeves of sleeves 1, 2, 3, and 4 were knitted in order of size, and then the physical properties and clinical tests were evaluated. As a result, the pressure of compression sleeve in wrinkle was the lowest in sleeve 1 with 3.81 kPa, and the highest in sleeve 4 with 5.22 kPa. Elastic recovery rate is that all parts except the top of the sleeve 1 exhibited 100%. The air permeability was good at 12.1 ~ 16.1 cm³/cm²/sec, and peeling was also comparatively excellent as grade 3. In addition, the weight of the compression sleeves 1, 2, and 3 decreased as 18.3 ~ 23.0 g/m² depend on size, while the compared sample was heavier with 17.39 ~ 32.61 g/m². In lymphoscintigraphy test, it was confirmed that the function of remaining lymph node was good in all patients. Although there were no differences between samples in skin irritation and tightness in wearing comfort, the manufactured sleeves showed better fit, lightness, fashion and breathability than the comparable sleeves.

• Fibers and Polymers
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• 제5권4호
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• pp.321-326
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• 2004

[ $TiO_2$ ] contents in yarns can influence color yield so that dyeing quality of industrial polyethylene terephthalate (PET) yarns can be improved through the adjustment of $TiO_2$ contents. To evaluate the dyeing performance of color yield, the chips which included the different $TiO_2$ contents of 330,550, and 1,100 ppm respectively were used to produce the yarns of different $TiO_2$ content by a spin-draft machine. The physical and structural properties of the yarns were measured to investigate effect of the $TiO_2$ contents on them. Dye uptake and dyeing rate were also evaluated using a colorimeter to compare the yarns having different TiOz contents. The experimental results showed that there were no appreciable variation in physical and structural properties among the yarn samples and no difference were observed among the dyed fabric samples with regard to dyeing uptake and dyeing rate. However, the color yield of dyed fabrics increased as $TiO_2$ contents decreased in the yarns especially when the fabric samples were dyed to pale shade. The physical reasoning could be proposed on why the yarns having low $TiO_2$ contents appeared to have higher color yield after dyeing.

• 공업화학
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• 제8권1호
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• pp.76-83
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• 1997

열방성 액정고분자(TLCP)와 폴리(에틸렌 테레프탈레이트)를 혼합용매 중에서 블렌딩하였으며, 이들 블렌드는 capillary rheometer die를 통하여 $287^{\circ}C$에서 섬유상 압출물로 가공되었다. 블렌드와 제조된 복합재료의 열적 성질, 기계적 성질, 모폴로지는 DSC, 편광현미경, SEM 및 인장시험에 의하여 조사되었다. 블렌드의 결정화 동력학은 등온 DSC 방법에 의하여 측정된 데이타로부터 Avrami식을 이용하여 결정화 속도 및 결정성장 메카니즘에 대한 정보를 얻었다. 블렌드내의 액정상은 가공온도조건하에서 거대상분킥나 열분해현상을 보이지 않았으며, 액체질소 속에서 절단된 섬유 단면의 SEM 관찰에 의하면, 섬유내 TLCP domain은 $0.1{\mu}m$에서 $0.2{\mu}m$정도의 크기로 분산되었고, 두 상 계면에서의 접착은 잘 되어있음을 알 수 있었다. TLCP/PET in-situ 섬유상 복합재료의 인장강도와 모듈러스는 TLCP 함량이 많을수록, draw ratio가 높을수록 증가됨을 알 수 있었다.

• Fibers and Polymers
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• 제2권3호
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• pp.129-134
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• 2001

Liquid crystalline (LC) poly(ethylene terephthalate-co-2(3)-chloro-1,4-phenylene terephthalate) (50/50, mole/mole) [PECPT] was synthesized and blended with polycarbonate (PC). LC properties of PECPT and thermal, morphological, and rheological behaviors of the PECPT/PC blend were studied. PECPT showed the nematic LC phase and much longer relaxation time than poly(ethylene terephthalate) (PET). The apparent melt viscosity of PECPT was one third of that of FET. An abrupt torque change was observed during the blending process due to the orientation of LC domains. For the blends containing 10~30 wt% of PECPT, the complex viscosities were higher than that of PC. As PECPT content increases above 40 wt%, shear thinning was observed. The lowest complex viscosity was obtained at 40~50 wt%. Transesterification of PECPT and PC was confirmed by the selective chemical degradation of carbonate groups in PC.

• 한국염색가공학회:학술대회논문집
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• 한국염색가공학회 2008년도 제38차 학술발표대회
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• pp.19-21
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• 2008

The quinolone antibiotics Ciprofloxacin shows broad antimicrobial spectrum, heat stability, limited water solubility, and similar structure and size to disperse dyes. The object of this study is to develop the infection-resistant medical extile material by applying Ciprofloxacin to a series of polyester materials such as PET, PDO, PLA, and PGA. All the Ciprofloxacin compound polyester materials demonstrated the superior antimicrobial activity to the organisms S. aureus and E. coli.