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Evaluation of Thermoregulatory Properties of Thermal Underwear Named as 'Heating Underwear' using Thermal Manikin and Human Performance Test

'발열내복'이라 광고되는 시판 기능성 보온내복의 써멀 마네킹과 인체 착용 실험을 통한 체온조절 성능 평가

  • Lee, Hyo-Hyun (Research Institute of Human Ecology, Seoul National University) ;
  • Lee, Young-Ran (Dept. of Textiles, Merchandising and Fashion Design, Seoul National University) ;
  • Kim, Ji-Eun (Dept. of Textiles, Merchandising and Fashion Design, Seoul National University) ;
  • Kim, Siyeon (Dept. of Textiles, Merchandising and Fashion Design, Seoul National University) ;
  • Lee, Joo-Young (Research Institute of Human Ecology, Seoul National University)
  • 이효현 (서울대학교 생활과학연구소) ;
  • 이영란 (서울대학교 의류학과) ;
  • 김지은 (서울대학교 의류학과) ;
  • 김시연 (서울대학교 의류학과) ;
  • 이주영 (서울대학교 생활과학연구소)
  • Received : 2015.06.02
  • Accepted : 2015.08.05
  • Published : 2015.08.31

Abstract

This study evaluated the thermoregulatory properties of functional thermal underwear ('heating underwear') in markets using a thermal manikin and human wear trials. One ordinary thermal underwear (ORD) and two functional thermal underwear (HEAT1 and HEAT2; manufactured goods, HEAT1: moisture absorbing heat release mechanism, HEAT2: heat storage, release mechanism) were chosen. Thermo-physiological and subjective responses were evaluated at an air temperature of $5.0{\pm}0.5^{\circ}C$ and air humidity of $30{\pm}5%RH$ with five male subjects ($21.6{\pm}1.3yr$ in age, $178.0{\pm}5.9cm$ in height, $68.2{\pm}5.9kg$ in body mass). Experimental conditions consisted of four ensembles that included winter clothes (Control: no underwear, ORD, HEAT1, HEAT2). Water-vapor resistance was greater in fabric of HEAT1 than others. The results were: 1) Total thermal insulation (IT) using a thermal manikin were not greater for HEAT1 (0.860clo) and HEAT 2 (0.873clo) than for ORD (0.886clo). 2) There were no significant differences in rectal temperature, mean skin temperature, heart rate and total body mass loss between the four conditions. Microclimate clothing temperature on the back was greater for ORD than for HEAT1 and HEAT2. Subjects felt more comfortable with HEAT1 than for others at rest. HEAT2 was higher in microclimate humidity when compared to other conditions. The results suggest that thermoregulatory properties of 'heating underwear' in market did not differ from those of ordinary thermal underwear in terms of total thermal insulation and thermoregulatory responses in a cold environment.

Keywords

thermal underwear;thermal manikin;thermal insulation;thermal comfort;physiological responses

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