Thermal insulation valure(TIV) was calculated by the following equation, based on the device for measuring heat keeping property of the Thermal Labo II type.The measuring conditions were 55%, 65%, 75%, 85%, and 95%RH, and air movement lOcm/sec, respectively,
with a constant temperature of 20°C. The temperature of the hot plate was 30°C, and air space between the hot plate and the knitted fabrics were 0 ,1, 2 , 4 , 6 , and 8mm.Fig.1 shows the principle used by the Thermo Labo device to measure the TIV of knitted fabrics.All properties including tensile, shearing, compression, bending, surface and thickness were measured under the knit condition(high sensitivity condition) of KES-F system's mechanical property.
図1はThermo Labo 装置によるニット繊維のTIV 測定の原理を示す。張力、せん断応力、圧縮応力、曲げ強度、表面および厚さなど、すべての特性はKES-Fシステムの機械的特性の下でのニット条件(高感度条件) で測定した。