Development of 3D Life Jackets Made of Neoprene Considering Extension Properties of the Product
Vol. 53, No. 3, pp. 189-198,
Jun. 2016
10.12772/TSE.2016.53.189
PDF
Abstract
As people spend more time on water leisure activities, the importance of safe and comfortable life jackets that fit the wearer is being emphasized. If a life jacket is designed using neoprene, which lacks elasticity, the coverage ratio may be low considering consumer size; therefore, various sizes of life jackets should be produced to fit the human body to maintain comfort and function. In this research, the method of designing a comfortable life jacket with an extended extension ratio and optimal grading rule was investigated to minimize the size category. In addition, Ziegert and Keil’s method was modified and applied to investigate the stretch characteristics of thick neoprene and double jersey materials and those of the end product. According to the observed extension value of neoprene and double jersey, they were allocated the patterns of a life jacket to cover wider ranges of human body sizes. The results showed that extension properties of materials and products measured using Ziegert and Keil's experimental condition matched satisfactorily to the actual wear condition of the product made of stretch fabric. Grading rules were suggested according to the extension properties of the life jacket and clothing pressure as well as the Size Korea database.
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