• Proceedings of the Korean Society of Dyers and Finishers Conference
• /
• 한국염색가공학회 2009년도 제41차 학술발표회
• /
• pp.145-146
• /
• 2009

This is studies about development of light nylon fabric and development of low denier NCD/nylon6 filament using mixed spinning technique of nylon6 and NCD(Nylon Cation Dyeable) polymer. We study how the manufactured fabrics effect on downproof & windproof properties according to conditions of low denier N/NCD filament yarn, fabrication, and dyeing and finishing.

• Proceedings of the Korean Fiber Society Conference
• /
• 한국섬유공학회 2003년도 가을 학술발표회 논문집
• /
• pp.92-95
• /
• 2003

스포츠웨어는 착용 중의 쾌적함을 위하여 자연환경의 변화, 인체의 운동 및 활동 상황에 맞추어 그 기능을 적절히 조절할 수 있어야 한다. 인체는 체온 조절을 위해 땀을 흘리고 이 땀이 의복 밖으로 원활히 방출되지 못하면 덥고 습한 온열 생리적 불쾌감이 유발된다. 그러므로 온열적 불쾌감을 발생시키지 않도록 하는 것이 스포츠웨어가 가져야 할 중요한 기능이다. 이러한 환경 및 인체변화에 대응하여 투습ㆍ발수 소재가 일상 스포츠 웨어의 소재로 널리 쓰이고 있다. (중략)

• Proceedings of the Korean Fiber Society Conference
• /
• 한국섬유공학회 2001년도 가을 학술발표회 논문집
• /
• pp.21-24
• /
• 2001

Polyurethane are used for a wide range of commercial applications such as adhesives or coatings for various substrates including textile fabric, plastic, wood, glass fiber, and metals. The types of polyurethane ionomers have been reported according to the ionic charges on the polymer main chain, i.e. anionomer, cationomer, and zwitterconomers. (omitted)

• Proceedings of the Korean Society For Composite Materials Conference
• /
• 한국복합재료학회 2000년도 추계학술발표대회 논문집
• /
• pp.257-260
• /
• 2000

The composite composed of glass fabric and BMI resin was fabricated using resin transfer molding(RTM) process. it will be used as a supporting plate of transformer coil for high speed train. To develop a RTM process, permeability of preform was measured and resin properties like a viscosity and gellation time were checked. A resin pre-heating system and a mold system were also designed and developed. Using a vacuum-assisted RTM process, the composite supporting plate was successfully fabricated.

• Fibers and Polymers
• /
• 제7권4호
• /
• pp.450-456
• /
• 2006

The objectives of this study were to investigate physiological and psychological responses to the rustling sound of Korean traditional silk fabrics and to figure out objective measurements such as sound parameters and mechanical properties determining the human responses. Five different traditional silk fabrics were selected by cluster analysis and their sound characteristics were observed in terms of FFT spectra and some calculated sound parameters including level pressure of total sound (LPT), Zwicker's psychoacoustic parameters - loudness(Z), sharpness(Z), roughness(Z), and fluctuation strength(Z), and sound color factors such as ${\Delta}L\;and\;{\Delta}f$. As physiological signals, the ratio of low frequency to high frequency (LF/HF) from the power spectrum of heart rate variability, pulse volume (PV), heart rate (HR), and skin conductance level (SCL) evoked by the fabric sounds were measured from thirty participants. Also, seven aspects of psychological state including softness, loudness, sharpness, roughness, clearness, highness, and pleasantness were evaluated when each sound was presented. The traditional silk fabric sounds were likely to be felt as soft and pleasant rather than clear and high, which seemed to evoke less change of both LF/HF and SCL indicating a negative sensation than other fabrics previously reported. As fluctuation strength(Z) were higher and bending rigidity (B) values lower, the fabrics tended to be perceived as sounding softer, which resulted in increase of PV changes. The higher LPT was concerned with higher rating for subjective loudness so that HR was more increased. Also, compression linearity (LC) affected subjective pleasantness positively, which caused less changes of HR. Therefore, we concluded that such objective measurements as LPT, fluctuation strength(Z), bending rigidity (B), and compression linearity (LC) were significant factors affecting physiological and psychological responses to the sounds of Korean traditional silk fabrics.

• Computers and Concrete
• /
• 제8권2호
• /
• pp.193-206
• /
• 2011

The use of Carbon Fiber Reinforced Polymers (CFRP) to strengthen reinforced concrete beams under bending and shear has gained rapid growth in recent years. The performance of shear strengthened beams with externally bonded CFRP laminate or fabric strips is raising many concerns when the beam is loaded under cyclic loading. Such concerns warrant experimental, analytical and numerical investigation of such beams under cyclic loading. To date, limited investigations have been carried out to address this concern. This paper presents a numerical investigation by developing a nonlinear finite element (FE) model to study the response of a cantilever reinforced concrete T-beam strengthened in shear with side bonded CFRP fabric strips and subjected to cyclic loading. A detailed 3D nonlinear finite element model that takes into account the orthotropic nature of the polymer's fibers is developed. In order to simulate the bond between the CFRP sheets and concrete, a layer having the material properties of the adhesive epoxy resin is introduced in the model as an interface between the CFRP sheets and concrete surface. Appropriate numerical modeling strategies were used and the response envelope and the load-displacement hysteresis loops of the FE model were compared with the experimental response at all stages of the cyclic loading. It is observed that the responses of the FE beam model are in good agreement with those of the experimental test. A parametric study was conducted using the validated FE model to investigate the effect of spacing between CFRP sheets, number of CFRP layers, and fiber orientation on the overall performance of the T-beam. It is concluded that successful FE modeling provides a practical and economical tool to investigate the behavior of such strengthened beams when subjected to cyclic loading.

• The Research Journal of the Costume Culture
• /
• 제9권4호
• /
• pp.616-628
• /
• 2001

The purpose of this research is to create a polyester sample book that serves as a point of reference that exporters in the Taegu area can allude to when exporting to the U.S. By getting this project off the ground, we can expect to make a worthy contribution to the manufacture of high-quality, value-added fashion & textile goods. The research was conducted as follows. First, a study was carried out in the local market ensued by consumer surveys with regards to consumer attitude on man-made fibers, market researches, and interviews with experts, all in conjunction with the Color Association of the U.S. Also, a diverse array of fabric swatches were collected from Manhattans fabric wholesalers and then classified by color and fabric type fur the sample book. In short, this research found that man-made fibers have full marketability in the U.S. Thus, in order for Taegus synthetic textile firms to be successful in exporting to the US, it is essential that they come up with fabrics that have properties resembling natural fibers such as having a soft hand, natural sheen, smooth draping, and diverse textures as well as being in line with the current trends. In addition, it is also necessary to develop fabrications that are versatile and functional. Thus, by developing innovative fabrications, the synthetic textile business will turn toward the production of high-quality synthetics and will also provide a platfrom for strengthening the competitive edge of Koreas textile & fashion business.

• Fashion & Textile Research Journal
• /
• 제18권3호
• /
• pp.380-386
• /
• 2016

This study examined the stainability and functionality of cotton dyed with the extract of Salvia Plebia R. Br. as a research preceding the development of health functional materials and fashion products with a healing motif. The CIELAB measurements of the cotton fabric dyed with the extract of Salvia Plebia R. Br. showed 73.32 for $L^*$, 1.7 for $a^*$, and 37.78 for $b^*$, while the Munsell measurements exhibited 2.63Y in color, 7.18 of brightness, and 5.49 of chroma. The degree of staining resulting from color fastness to laundering, and that resulting from color fastness to perspiration (acid and alkaline), as well as the level of color fastness to crocking (wet and dry) all stayed between relatively higher levels of 4 and 5. The fabric dyed also exhibited SPF 50+, an outstanding sun blocking performance. The deodorization rate was also excellent, rising from 97% to over 99% when the time elapsed increased from 30 minutes to 120 minutes. The fabric dyed also showed a 99.6% antimicrobial activity against staphylococcus aureus ATCC 6538, and a 71.4% antimicrobial activity against Klebsiella pneumoniae ATCC 4352. The aforementioned findings indicate that fabrics dyed with the extract of Salvia Plebia R. Br. contain the potential to be developed for use as health-related materials and fashion products that promote healing.

• Journal of Adhesion and Interface
• /
• 제7권3호
• /
• pp.16-25
• /
• 2006

Water vapour permeable and water resistant film was laminated to made footwear woven fabric and non-woven fabrics by screen type with thermosetting reactive hot melt adhesive. Optimum conditions of each process were investigated, and the properties of film laminated fabric with optimum conditions are evaluated. The results are as follows. Thermosetting reactive polyurethane hot melt is retain proper heat resistance differently thermoplastic hot melt. Optimum melting adhesive process conditions are as follows ; drum temperature $95^{\circ}C$, hose temperature $97^{\circ}C$, feeding pipe temperature $100^{\circ}C$, screen temperature $105^{\circ}C$, pressure of opposite roller $1kgf/cm^2$, pressure of laminating roller $3kgf/cm^2$, finishing speed 15 m/min, melting temperature $120^{\circ}C$, cooling time 20 s, pressing temperature $130^{\circ}C$, pressing time 30 s. As the thickness of film was increased, the water vapour permeability was decreased but water resistance was increased, and the effect of film is dominant over all the others in the air permeability.

• Journal of the Korea Institute of Building Construction
• /
• 제16권6호
• /
• pp.545-551
• /
• 2016

Membrane structures which can be used large spatial structure are being expanded because of various advantages. However, despite the diverse membrane structure buildings and materials, the standard for membrane material performance that considering fire safety is still inadequate. Therefore, this study applied basalt or glass woven fabric with flame resistance on architectural membrane, and report the fire safety for architectural membrane using the strength properties, flammability and incombustibility. From the test result, the architectural membrane using basalt or glass woven fabric showed a low heat release rate and total heat release. Therefore, it was confirmed that the fire safety is relatively high.