Journal of the Korean Society of Clothing and Textiles (한국의류학회지)
- Volume 1 Issue 1
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- Pages.25-29
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- 1977
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- 1225-1151(pISSN)
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- 2234-0793(eISSN)
Analysis of the Waymth Retentivity of Waddings
솜의 보온특성분석
- Chang Shin Yae (Dept. of Clothing and Textiler, College of Home Economics. Yonsei University) ;
- Kahng He Won (Dept. of Clothing and Textiler, College of Home Economics. Yonsei University) ;
- Kim Sung Reon (College of Home Economics, Seoul National University)
- Published : 1977.05.01
Abstract
The warmth retentivity of natural and syntheic waddings as bedding stuff, and further, the machanism of heat transmission through conduction, radiation and convection were analysed. The materials used were cotton, silk, and wool as natural waddings, and polyamide, polyester, regular acrylic, conjugate acrylic, regular polyprepylene and conjugate polypropylene as synthetic waddings. The results of this study are as follow: 1. The warmth retentivity is highest in silk. Following silk in descending order is cotton, conjugate acrylic, polyester, regular acrylic, wool, polyamide, conjugate polypropylene and regular polypropylene. There is not any significant relationship between warmth retentivity and the conductivity of the fibers. 2. Transmission by radiation through the fiber waddings is highest in conjugate polypropylene. Following conjugate polypropylene in descending order is regular polypropylene. polyester. polyamide, conjugate acrylic, regular acrylic, wool, cotton, and silk. This is seen to be in nearly reversed order to the abovementioned order of warmth retentivity. In this respect, warmth retentivity with loose fibreous material as in the case of bedding stuff is primarily affected by the interceptive function of the fibers in heat radiation. 3. Warmth retentivity becomes lower with increasing air content of the waddings. This is because heat transmission by radiation incrases as air content increases. The air content increase is due to the fact that the air is unable to intercept heat radiation. In addition, heat transmission accelates in proportion to the increase in convection as the air gap enlarges.
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