• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 1999.11a
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• pp.208-212
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• 1999

In the use of glass fiber reinforced plastics(GFRP), cutting is often necessary. But the most of past studies have been interested in the effect of fiber orientation on tool wear. In this study, the effects of fiber contents on tool wear were investigated experimentally. By proper selection of cutting tool, the variables are cutting speed and fiber contents of 10, 20, 30wt% with fixed feed rate and depth of cut.

• Elastomers and Composites
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• v.51 no.4
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• pp.317-341
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• 2016

Polyamide (PA) is one of five engineering plastic materials which has good mechanical properties and competitive price compared to other engineering plastics and it has various applications including in the areas of automotives, electronics and aerospace industry. Even though PA market grows fast compared to other engineering plastics, it has few organized literatures regarding researches and applications. In this paper, we review overall background, characteristics, formulation, current market trends and technology development of PA resins and their composites.

• KSBB Journal
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• v.10 no.4
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• pp.406-420
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• 1995

Polyhydroxyalkanoates[PHAs] are the polyester of hydroxyalkanoates(HAs) synthesized by numerous bacteria as an intracellular carbon and energy storage compound and accumulated as granules in the cytoplasm of the cells under unbalanced growth condition in the presence of excess carbon source. Even though PHAs have been recognized as good candidates for biodegradable plastics, their high price compared with conventional plastics has limited their use in a wide mange of applications. To reduce the high production cost of PHAs, many group of scientists have devoted much efforts to improve productivity by employing various microorganisms and by developing efficient culture techniques. The strategies of producing PHAs to a high concentration with high productivity and their potential applications are reviewed.

• Journal of the Korea Furniture Society
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• v.14 no.2
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• pp.87-96
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• 2003

This study explores aesthetics and materials used in domestic and international hanger designs from 1850 to 2003. At the second half of the nineteenth century, most hangers were handmade and made of wood and metal. At the first half of the twentieth century, such diverse materials as paper, plastics, and leather began to use other than such typical materials as wood and metal at the previous decades. However, from the second half of the twentieth century the use of different types of plastics led to artistic abnormal shapes within typical triangular types. Moreover, this study also examines hangers by its functions: primary, portable, and multi-functional types.

• The monthly packaging world
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• s.92
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• pp.186-206
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• 2000

• The monthly packaging world
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• s.130
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• pp.109-117
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• 2004

• JOURNAL OF ELECTRICAL WORLD
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• no.12 s.72
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• pp.24-27
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• 1982

• The monthly packaging world
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• s.102
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• pp.208-213
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• 2001

• The monthly packaging world
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• s.102
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• pp.214-218
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• 2001

• The monthly packaging world
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• s.226
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• pp.58-71
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• 2012