의류제품의 세탁조건과 지속가능성: 세탁온도와 세탁시간을 중심으로

윤창상 ( Changsang Yun ),류한나 ( Hanna Ryu ),박소현 ( Sohyun Park ) 대한가정학회 2018 Human Ecology Research(HER) Vol.56 No.5

The use stage of a textile product impacts sustainability more significantly than other stages of the product’s life cycle due to repeated washing and drying. This study determines efficient washing conditions, with high detergency, to reduce energy consumption from excessive washing and improve the washing process sustainability. Detergency was measured at various washing temperatures (20°C, 40°C, and 60°C) and time (10 min, 20 min, and 30 min) using standardized soiled fabrics, i.e., 100% cotton, polyester/cotton (65%/35%), and 100% polyester woven fabric soiled with pigment/sebum, carbon black/mineral oil, soot/mineral oil, cocoa, blood, and red wine. Detergency at the washing condition of 20 ℃ and 30 min was higher than that at 40 ℃ and 10 min. In addition, detergency at the condition of 40 ℃ and 30 min was also higher than that at 60 ℃ and 10 minutes. This may be because a reduced washing effect at low washing temperatures was complemented by increased mechanical action over a long time. Further, washing temperature and time, with the same detergency, differed based on the type of fiber and soil. Also, the influence of a detergent on the detergency depends on the type of soil. The results suggest that energy and detergent have been consumed more than necessary in actual laundry. According to each type of fiber and soil, washing conditions designed to reduce the energy consumption of the washing process while maintaining the same detergency, were determined.

세탁 및 건조과정에 의한 스판덱스 혼방 직물의 변형 비교

윤창상 ( Changsang Yun ),고예린 ( Yerin Ko ),송경희 ( Gyeong Hee Song ),신효담 ( Hyodam Shim ),박정희 ( Chung Hee Park ) 한국의류학회 2017 한국의류학회지 Vol.41 No.3

There is increased interest in clothes dryers and garments made of spandex-blend woven fabrics; however, there is limited information available for the laundering and drying these clothes. This study investigates the effects of washing and drying on shrinkage, skewness, and wrinkle for woven fabrics with and without spandex. When spandex with good elastic recovery was blended, the deformed shape from washing and drying improved skewness and wrinkle by easily returning to its original shape. However, these properties had a negative effect on shrinkage in terms of length and area change. When the influence of clothes maintenance was classified, the drying process had the biggest influence of 58%, followed by spinning-rinsing-washing. Tumble drying, in which the fabric is exposed to mechanical force and heat for a long period, had more negative effects on the dimensional stability than line drying. The spandex blend had the effect of preventing skewness and wrinkle in garments, but it was also shown to accelerate shrinkage by garment main-tenance cycles. It was important to control drying in order to reduce shrinkage during the maintenance pro-cess; consequently, this had the greatest influence on the dimensional stability of fabrics. Therefore, line dry-ing was more advantageous for spandex-blend fabrics than tumble drying in terms of management for shrin-kage, skewness, and wrinkle.

Development of digitized evaluation methods for fabric shrinkage and damage using image analysis

Eunbi Yun,Sungmin Kim,윤창상 한국의류학회 2023 Fashion and Textiles Vol.10 No.1

The aim of this study is to develop digitalized evaluation methods for fabric shrinkage and damage using image analysis. To develop the shrinkage assessment method, 81 grid dots (nine horizontal lines and nine vertical lines) are introduced into the test fabric. This allows the shrinkage to be verified based on the change in distance between neighboring dots, which not only presents the shrinkage in the warp and weft directions, but also the area shrinkage and skewness. The developed evaluation method yields a value that differs from the actual measured value by less than 1 mm, which confirms its significance. To develop a damage evaluation method using the Original Danish MA test fabric, the change in area caused by loosening threads in five holes is evaluated. The area change in the developed method and the number of loosened threads in the conventional method has a high correlation. Comparing the number of dots in the Poka-Dot test fabric before and after washing enables one to distinguish incorrectly created dots during the manufacturing process and to accurately measure the number of missing dots such that the result is similar to the actual measurement. The accuracy and reproducibility of the developed measurement method are confirmed using various verification such as error rate, washing cycle, and washing time. Digitizing the evaluation method can contribute to the digital transformation of apparel quality evaluation by reducing labor and errors between evaluators.

Development of a test method for the dynamic drapability of fabrics using reciprocating motion

Eunbi Yun,윤창상 한국의류학회 2023 Fashion and Textiles Vol.10 No.1

This study aimed to develop a method for measuring the dynamic drapability of fabrics using a reciprocating motion device that mimics the movement created by shaking a piece of fabric. Five types of fabrics were selected based on their drape coefficients and weights, and the lengths of fabrics were determined based on skirt length (50 cm) and dress length (100 cm). The width and speed of the reciprocating motion were considered as the experimental variables. Results of reciprocating motion-based fabric movement analysis revealed that the number of nodes, the position of the first node, amplitude, total length, and area are significant factors for measuring dynamic drapability. It was found that the longer fabrics had more nodes, enabling measurement of various types of fabrics. Furthermore, it was found that a wider reciprocation width under the same speed and a faster reciprocation speed with the same width favorably demonstrated dynamic drapability, resulting in proportionality between the reciprocating motion and the force transmitted to the fabric. Movement analysis of seven selected conditions and additional samples showed that the optimal condition was a 100-mm reciprocation width and a 150-rpm speed and that the first node’s position is the most significant factor for a dynamic drapability. To verify the proposed measurement method, measuring four pairs of fabrics with similar drape coefficients but different shapes showed that as fabric weight increased, the node moved downward, despite similar drape coefficient values. This confirms that the proposed method can overcome the limitations of the existing drape coefficient.

웨어러블 디바이스를 위한 은 나노와이어 코팅 전도사 개발

김지민 ( Jimin Kim ),윤창상 ( Changsang Yun ) 한국의류학회 2021 한국의류학회지 Vol.45 No.4

Recent advances in electronic technology have engendered a need for research on the use of smart materials in clothing. Electro-conductive fibers are expected to be a crucial element of wearable devices. Therefore, in this study, we have attempted to develop electro-conductive threads and cables using silver nanowires. Based on the characteristics of silver nanowire, in which electro-conductivity can be imparted via heat treatment, we prepared conductive threads by coating nylon yarn with silver nanowires and curing at temperatures of 140°C, 150°C, and 160°C. Conductive threads cured at 140°C had the highest conductivity, followed by threads cured at 160°C and 150°C respectively. The order of the electrical conductivity of the threads after tensile testing was consistent with the original order of the conductivity of the threads. When we evaluated the sensing performance of electro-conductive cables fabricated from these threads, the cables manufactured from threads cured at 140°C and 160°C were found to function normally within temperature and humidity sensors. All the cables operated normally in illuminance and electrocardiogram sensors. Thus, we believe that threads made of silver nanowire have sufficient electrical conductivity to be utilized as wearable sensors.

하절기 및 간절기용 셀룰로오스섬유 교직물의 특성

배영희(Bea, Young Hiee),윤창상(Yun, Chang Sang),정운선(Jeong, Woon Seon) 한국지역사회생활과학회 2015 한국지역사회생활과학회 학술대회 자료집 Vol.2015 No.11

보문 : 웨트클리닝이 양모, 레이온 직물의 치수 안정성과 세탁성능에 미치는 영향

정승은 ( Seung Eun Chung ),윤창상 ( Chang Sang Yun ),박정희 ( Chung Hee Park ),김현숙 ( Hyun Sook Kim ) 한국의류학회 2012 한국의류학회지 Vol.36 No.2

This study focuses on the optimal washing conditions for dry cleaning recommended fabrics to minimize dimensional changes using wet cleaning. We suggest water-based alternatives to a perchloroethylene based cleaning process. Wool and rayon fabrics were laundered under various washing conditions and then airdried for 24hrs. All specimens were extended after spinning and shrunk after drying. This is probably because the fibers were swollen and extended by wetting. The wool fabrics were shown to be acutely influenced by washing temperature and mechanical force. The optimal washing conditions for wool fabric to minimize the dimensional change implied a normal washing temperature and minimized mechanical force. For rayon specimens, dimensional change by a hand wash showed a remarkable decrease compared with a machine wash. Rayon fabric seemed to be influenced by the quantity of water contained in the fabric after spinning and washing time. Therefore, the desirable washing conditions for rayon fabric are to reduce the time required for washing and to increase the spin speed.

견ㆍ인견과 셀룰로오스섬유 교직물의 쾌적성능 평가

배영희(Young Hee Bae),윤창상(Chang Sang Yun),정운선(Woon Seon Jeong) 한국지역사회생활과학회 2016 한국지역사회생활과학회지 Vol.27 No.4

의류관리기 내 직물거동이 구김 제거에 미치는 영향

유동주 ( Dongjoo Yu ),윤주희 ( Juhee Yoon ),이상욱 ( Sang Wook Lee ),윤창상 ( Changsang Yun ) 한국의류학회 2021 한국의류학회지 Vol.45 No.2

The purpose of this study was to examine the effect of fabric movement on wrinkle recovery in a clothing care system and to propose an algorithm to improve wrinkle removal performance by adjusting fabric movements. With an increase in the reciprocating speed of the movement system, the number and amplitude of curves on the fabric also increased. This allowed the fabric to be applied to a larger tension, resulting in better wrinkle removal performance at higher speeds. However, even at high reciprocating speeds, wrinkles could not be removed effectively because of nodes at a few specific locations. Based on the results of fabric movement and wrinkle recovery, a complex movement algorithm was proposed with a mixture of various reciprocation speeds. It showed a 41%p (24%→65%) improvement of wrinkle recovery when compared with the conventional algorithm that showed simple fabric movement at 180 rpm. This was because the positions of nodes and antinodes changed continuously and the force by the reciprocating motion could be applied evenly to the fabric.

보문 : 드럼세탁기 사용시 세탁물의 변,퇴색 방지에 관한 연구

유효선 ( Hyo Seon Ryu ),김은아 ( Eun Ah Kim ),윤창상 ( Chang Sang Yun ) 韓國衣類學會 2008 한국의류학회지 Vol.32 No.6