• Textile Coloration and Finishing
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• v.16 no.4
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• pp.36-44
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• 2004

This research surveys the differences of fabric mechanical properties according to the different looms and the fabric positions with relation to warp and weft weaving tensions on the Picanol and Omega looms respectively. For this purpose, the grey fabrics woven in the previous paper are processed in dyeing and finishing processes, and the processing shrinkages are measured on each processes such as dryer, scouring, pre-set, dyeing and final-set using the fabric density and width. The mechanical properties of the finished fabrics are measured and discussed with relation to the warp and weft weaving tensions of the two looms and the variations of the fabric mechanical properties according to the fabric positions are also discussed. In addition, the fabric thickness according to the fabric positions such as right, left selvedges and center of the fabrics is also measured and discussed with the characteristics of the Picanol and Omega looms.

• Textile Coloration and Finishing
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• v.18 no.5 s.90
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• pp.61-71
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• 2006

This paper addresses the factors hindering the image quality of lines in inkjet printed on polyester fabric as printing media. Lines were printed onto different types of polyester fabrics in warp and filling directions. Line image quality including line width, edge blurriness, and edge raggedness was assessed. The effect of capillary wicking on line image quality of printed spun polyester fabric is discussed. The factors on the image quality include printing position(top of the yam or between the yarn), printing direction(warp or filling), yarn structures(filament or spun), thread size(yam or fiber), finishing, and ink properties(evaporation rate). More than 30% differences in image quality results were observed by changing the printing location on the spun polyester fabric. The best results of the image quality were obtained with the printed plain and spun polyester fabrics. The fiber sizes may affect capillary size; therefore, the image quality can be dissimilar. Types of finishing materials and inks greatly improve the line image quality on spun polyester fabrics.

• Bulletin of the Korean Space Science Society
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• 2008.10a
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• pp.30.1-30.1
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• 2008

We investigate the evolution of the initially tilted, self-gravitating disks in a live axisymmetric or triaxial halo. Our study shows how the axisymmetric and triaxiaility of the halo alters the evolution of the warp compared to the spherical case. We attribute the development of warps to the torque between a halo and disk and that between the inner and outer regions of the disk. We discuss if the triaxial halo can be responsible for the formation and maintenance of the warp phenomena even in the presence of dynamical friction between the disk and the halo.

• Journal of the Korea Fashion and Costume Design Association
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• v.5 no.2
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• pp.65-74
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• 2003

The Purpose of this study is to investigate the jeogori included in the buddist statue in 1748. The jeogori was similar in shape to excavated costume of Andong Kwon, Papyung Yoon, and Chungyeongunju in 18th century. This jeogori was useful to estimate the interesting process of shape change of jeogori in 18th century. Four different silk fabrics were used in the jeogori. Outer fabrics were satin weave with floral, lattice strip, dragon, and cloud patterns. The ground area was 5-harness warp faced satin and the patterned area was 5-harness filling faced satin. An inner fabric was simple plain weave. Warp and filling yarns of all fabrics in this jeogori had no twist.

• Fibers and Polymers
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• v.7 no.1
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• pp.51-56
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• 2006

Power net fabric is one of the highly extensible two-way fabrics. Power net structure shows special characteristics in the wearing of final functional clothes. This research evaluated effects of treatment temperature on proportional extensibility and shrinkage ratio of spandex at a given wale length. As treatment temperature increased, extensibility increased proportionally to the standard length of the sample and the shrinkage ratio in the direction of course and wale increased. The pulling-out length increased proportionally to the standard length of the sample. However it was affected by the effect of treatment time and temperature due to the thermal properties of spandex filament yarn.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1998.11a
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• pp.446-449
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• 1998

향후 인터넷의 개방형 접속 및 유료화에 대비하여 한국통신에서는 개방형 인터넷 접속과 PC 통신의 과금 회수 대행 서비스인 인포샵 서비스를 인터넷상에서도 실현하기 위한 웹 인포샵 서비스 기능을 대용량 통신처리시스템에 개발하고 있다. 웹 인포샵 서비스는 사용자 ID 없어도 전화망을 통하여 누구나 인터넷을 사용할 수 있고, 유료 웹 사이트에 접속한 시간 또는 정보 이용량에 따라 과금하여 이를 전화번호에 통합 과금하는 서비스이다. 웹 인포샵 서비스는 proxy를 기반으로 개발 중이기 때문에 사용자가 웹 인포샵 서비스를 이용하기 위해서는 사전에 반드시 사용하는 웹 브라우저의 proxy 서버 주소를 사용자 인증 및 과금 대행을 처리하는 WARP(Web Authentication Resolving Processor) 서버 주소로 설정해야 되는 불편함이 있다. 본 논문에서는 이러한 불편함을 해소하여 사용자가 쉽게 웹 인포샵 서비스를 이용할 수 있도록 웹 브라우저 상의 proxy configuration에 영향을 주지 않는 플러그인 소프트웨어를 이용함으로써 단축 아이콘의 클릭만으로 자동적 WARP 서버에 접속하는 방법에 관한 내용을 기술하고 있다.

• Proceedings of the Korean Society For Composite Materials Conference
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• 2004.10a
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• pp.198-202
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• 2004

An analytical model using expanded bridging model was proposed to predict the elastic properties and behaviors of stitched multi-axial warp knitted (MWK) fabric composites, The characteristics of MWK fabric composites are the assemblage of multi-layers of fiber bundles for in-plane reinforcement and stitch yams for the through-the-thickness reinforcement. In the analysis, a representative volume of the MWK fabric composite was identified, The geometric limitations, effects of stitching yams and design parameters of MWK fabric composites were considered in the model. Then, the elastic properties and behaviors of MWK fabric composites were predicted, Finally, the results of proposed model of the composites were verified through the experiments, The predicted results were in fair agreement with the experimental results

• Proceedings of the Korean Society For Composite Materials Conference
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• 2004.10a
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• pp.216-219
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• 2004

The stitching process has been widely utilized for the improvement of through-thickness property of the conventional laminated composites. This paper rep0l1s the effects of stitching on the flexural and interlaminar shear properties of multiaxial warp knitted composites in order to examine the performance improvements. Considered parameters are as follows: the stacking regularity of the multiaxial warp knits, the stitch spacings, the stitching types, the stitching location, and the location of compression fixture nose. These parameters have little effect on the flexural and interlaminar shear properties, except for the case of stitching location. Stitching on the $0^{\circ}$ fibers showed the lowest flexural strength and modulus ($12\%$reduction for both properties). The stitch spacing of 5mm resulted 8% reduction in interlaminar strength compared with 10mm spacing.

• Proceedings of the Korean Society For Composite Materials Conference
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• 2002.10a
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• pp.280-283
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• 2002

In the manufacturing of large scale composite structures, the cost-effective processing and the enhancement of structural performance are critical. One of the most effective ways for this purpose is to use stitched multiaxial warp knitted (MWK) perform in the resin transfer molding process. This study reports the effect of stitching on the mechanical properties of MWK composites, and the feasibility processing of the thick U-beam structure utilizing the stitched preforms. Permeability of the preform, viscosity and cure property of the epoxy resin have been measured. The results of resin flow analysis has been used in determining the gate/vent locations of the RTM mold. Cross-sectional observation of the channel beam prototype demonstrated that the resin impregnation was almost complete, except for some surrounding area of stitched yarns.

• Proceedings of the Korean Society For Composite Materials Conference
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• 2005.11a
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• pp.107-110
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• 2005

In this study we investigated the shear and forming behavior of chain stitched multi-axial warp knitted fabric preform, so called non-crimp fabric (NCF). The picture frame test was performed to characterize the shear behavior of NCF and also provide material properties for the numerical simulation of its deformation behavior. The forming behavior of NCF with chain stitch were investigated using hemispherical forming tools. The experimental results show that processing conditions such as blank holder force (BHF) and preform shape are crucial to determining the forming behavior of NCF. For instance, an asymmetric formed shape, which is due to the stitches introduced to NCF, turns into a symmetric one as BHF increases. Furthermore the in-plane and out-of buckling (wrinkle), the severance of which were quantified using image processing method, decreases significantly as BHF increases.