• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2003.11a
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• pp.1351-1355
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• 2003

최근 의류용 감성소재가 다양해지면서 소재의 특성에 따른 최적 설계가 data-base에서 빨리 공급 될 수 있다면 시행착오에 따른 시간과 경비가 적게 소비되면서 소비자의 요구에 빨리 대응할 수 있는 소위 Q.R.도 가능하게 될 것이다. 이러한 감성 의류용 직물의 data base화를 위해서는 rapier, water-jet, air-jet 등 직기에 따른 소재의 설계분포 그리고 직기의 종류에 따라서 직물 설계 data의 분포가 어떠한지를 우선 조사하여야 한다. 본 연구에서는 국내 3개 업체의 실제 현장에서 생산되고 있는 PET 소재의 감성의류용 직물소재의 설계 Data를 직기별로 구분하고 직물 설계 조건들을 조사ㆍ분석하여 경사, 위사 번수별 조직계수를 계산하여 이들 data를 data-base화하고 도시하였다. 또한 이들 분석된 그래프에서 직기 종류별, 직물 조직별, 소재 item별 조직계수와 직물밀도를 예측할 수 있는 방법을 제시함과 더불어 조직에 따른 이들 직물의 설계조건을 제안함으로서 실제 현장에서 쉽게 사용할 수 있는 연구자료를 업체에 제공하고자 한다.

• Magazine of the Korean Society of Agricultural Engineers
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• v.45 no.6
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• pp.162-171
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• 2003

Traditional methods of earth reinforcement consist of introducing strips, fabrics, or grids into an earth mass. Recently, discrete fibers are simply added and mixed with the soil, much the same as cement, lime or other additives. The advantages of randomly distributed fibers is the maintenance of strength isotropy, low decrease in post-peak shear strength and high stability at failure. In this study, new composite reinforcement structures which consist of geotextile and randomly distributed discrete fibers were examined their engineering properties, such as shear strength of the composite reinforced soil and permeability of short fiber reinforced soil. The increments of shear strength of composite reinforced soils were the sum of increments by fiber and woven geotextile, respectively. The permeability of short fiber reinforced soil was increased with fiber mixing ratio.

• Fibers and Polymers
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• v.2 no.1
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• pp.157-162
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• 2001

Dyebath used for metal complex dyeing of nylon microfiber was recycled to reduce the overall amounts of metal complex dyeing effluents. Instead of discharging the dyebath after each dyeing cycle, the residual dyebath was analyzed spectrophotometrically and reconstituted to the required concentration of dyes and auxiliaries. Dyebaths were reused eight times and the CIELAB coordinates of dyed samples were measured after each recycling. Color difference($\Delta$E*) between the sample dyed in the fresh bath and that from reused dyebath was maintained below 1.5. The levelness and fastness of dyed fabrics from recycled dyebath were not impaired either. Chromium content of each recycled dyebath was similar to that of the first residual dyebath.

• Proceedings of the Korean Society For Composite Materials Conference
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• 2003.10a
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• pp.99-102
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• 2003

This paper aims to observe the micro-mechanical behaviour of tow geometry during deformation of dry woven carbon-fiber fabric. With the increment of shear angle fabric experiences 'lock-up'phenomenon. In this paper, deformation of micro-mechanical parameters such as tow interval, change in tow amplitude and wavelength are investigated. To observe the micro-deformation of the fabric structure, appropriate specimens from bias extension and biaxial tests are sectioned and observed under the microscope. It was found that different loading conditions cause geometric deferences in the tow architecture.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2002.04a
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• pp.70-73
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• 2002

노지고추는 재배면적이 2001년도에 74,471 ha 로서 원예작물 가운데 가장 많은 재배 면적을 가지고 있으며, 국민 식생활에 필수적인 양념채소이다. 이러한 고추는 최근 중국과 동남아 일대에서 값싼 노동력을 이용하여 국내 반입을 목적으로 재배되고 있다. 따라서 이들과 경쟁하기 위해서는 단위면적당 수량을 올리거나 고품질의 고추를 생산하지 않으면 재배와 판매 차원에서 어렵게 되어가고 있다. (중략)

• Fibers and Polymers
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• v.6 no.2
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• pp.162-168
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• 2005

A methodology for the objective evaluation of water repellency is studied using image analysis of the sprayed pattern on woven fabrics according to a standard spray test (AATCC Test Method 22-2001). The wet area ratio obtained from the spray standard test ranking is found to be exponentially related with its water repellency rating. Mean filtering is used to remove the effect of weave texture and the transmitted light through interyarn spaces. The ring frame of the instrument and wet region are recognized using Otsu thresholding technique. And Hough transform and outline operation are used to obtain the size and position of the ring frame. The objective assessment of the water repellency using image processing can reduce unnecessary confusion in the subjective determination of the water repellency.

• Advances in materials Research
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• v.3 no.3
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• pp.151-161
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• 2014

Geopolymer composites reinforced with different layers of woven flax fabric are fabricated using lay- up technique. Mechanical properties, such as flexural strength, flexural modulus and fracture toughness of geopolymer composites reinforced with 2.4, 3 and 4.1 wt% flax fibres are studied. The fracture surfaces of the composites are also examined using scanning electron microscopy. The results show that all the mechanical properties of the composites are improved by increasing the flax fibre contents. It is also found that the mechanical properties of flax fabric reinforced geopolymer composites are superior to pure geopolymer matrix. Micro-structural analysis of fracture surface of the composites indicated evidence of various toughening mechanisms by flax fabrics in the composites.

• Journal of Fashion Business
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• v.10 no.6
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• pp.16-27
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• 2006

The purpose of this study was to examine the effects of chemical finishes on performance characteristics of microfiber blend fabrics. A 60% polyester microfiber /40% cotton blend woven fabric was finished by ten chemicals: three silicone softeners, one fluorochemical, and their mixtures. Performance characteristics examined were fabric hand attributes. Fabric hand was evaluated by instrumental measures using Kawabata KES-F system instruments. Silicone-only finishes did not change the bending properties significantly from those of the control fabric. The fluorochemical-only finish made the fabric stiffer and crisper. When the two chemicals were mixed they tended to offset this adversary effect. Most of the chemical finishes made the surface finer and smoother. Fluorochemical-only finish improved fabric strength. Likewise, dimethylpolysiloxane silicone improved fabric strength. Amino-functional hydrophilic and diamino-functional silicone softeners, on the other hand, reduced fabric strength. However, when mixed with the fluorochemical, the adversary effect was diminished.

• Textile Coloration and Finishing
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• v.15 no.3
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• pp.168-175
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• 2003

Ultramicrofiber(UMF) PET knitted fabric and regular PET plain woven fabric as reference sample were impregnated with waterborne polyurethane(PU) in a two-step process with dyeing/PU treatment and PU treatment/dyeing to investigate the effect of the treatment sequence. The waterborne PU impregnated fabrics were dyed with two kinds of vat and disperse dyes to investigate the dyeing properties and the dyeing fastnesses. In vat dyeing the rank of color strength(K/S) was in order of dyeing/PU impregnation > dyeing only > PU impregnation/dyeing, whereas in case of disperse dyeing, the order was dyeing/PU impregnation > PU impregnation/dyeing >dyeing only. Wash fastness of vat dyeing showed a higher 2-3 grade than disperse dyeing, while rubbing and light fastnesses were not good for disperse dyes.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.34 no.5
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• pp.49-55
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• 2002

A new method is proposed for the on-line measurement of the fiber orientation of sheet materials. The measurement of fiber orientation is very important in manufacturing paper sheets, non-woven fabrics, and glass sheets, because fiber orientation strongly affects product properties represented by, for example, dimensional stability of paper. A method developed in this research utilizes anisotropy of dielectric constants of sheet materials as a key characteristic to determine the fiber orientation. The new on-line sensor, consisting of 5 microwave dielectric resonators set in different directions, was designed to detect the fiber orientation while paper is running with high speed on a paper machine. This sensor can determine the direction and the degree of fiber orientation from the measured direction of the maximal dielectric constant and its variation, respectively. The fundamental performance of this system was examined by the static measurement of printing grade paper, which gave a satisfactory result. Then, the dynamic measurements were done at a speed of 1,000 m/min by using a high-speed test-coating machine.