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메조페이스/등방성 핏치의 방사성 판단을 위한 점탄성거동
김용중,김보혜,이동훈,김창효,양갑승,이웅의,Kim, Yong-Joong,Kim, Bo-Hye,Lee, Dong-Hun,Kim, Chang-Hyo,Yang, Kap-Seung,Lee, Woong-Eui 한국섬유공학회 2010 한국섬유공학회지 Vol.47 No.4
The rheological behavior of mesophase and isotropic pitch blends were examined using capillary and coneplate viscometers to determine the spinnability. The mesophase synthesized from naphthalene and coal tar pitch modified with benzoquinone were used. The individual component of the mesophase pitch or the isotropic phase pitch showed excellent spinnability but the spinnability of the blends decreased as the composition approached 50 wt.%. The variations of the spinnability were explained based on the mechanisms of capillary break-up and cohesive brittle fracture. The fracture of the spin line was caused mainly by capillary break-up originating from the high interfacial tension between the two separated phases; the behavior was more severe in the lower shear rate region, i.e. the elasticity dominant area. The spinnability of the two phase blends could be improved by maintaining the melts under the viscosity dominant condition by adjusting the shear rate and temperature.
박창규,이대훈,이웅의 한국의류학회 2003 한국의류학회지 Vol.27 No.3,4
In this research, an internet-based fabric information system has been developed. Recently, the numbers of textile industries which have their own homepages to advertise their product fabrics for apparel through the Internet and textile e-Commerce web sites rapidly increase. Unfortunately, traditional fabric information systems based on direct meeting and trust cannot give sufficient information to numerous visitors of the Internet sites including fabric buyers for apparel. They can just view 2-dimensional fabric images and text-based specifications such as fabric density, composition, colors, weight, etc. To solve these problems, the new fabric information system for apparel has been developed. The web-based fabric information system is composed of the following six modules; ① fabric database management system, ② a 3-D fabric drape image viewer to illustrate fabric appearances, ③ a virtual wearing system to apply a fabric to garment designs, ④ a fabric property viewer to confirm fabric characteristics, ⑤ a QC (quality control) document generator to manufacture high quality garments with a fabric, and ⑥ a virtual display mall to view actual fabrics. The fabric information system is simply performed by visitors clicking the buttons hyper-linked with JAVA applets on web browser. The web-based fabric information system enables the web site visitors to understand fabric shown on the Internet in more details.