Abstract
In this paper, we measured the temperature-dependent electrical resistance of five kinds of conductive yarns for temperature-sensitive textiles. Conductive yarns for temperature-sensitive textiles are multilayered and contain copper filaments. Krifi Cu-1, 2, 3, 4, and 5 are composed of 2, 3, 4, 7, and 14 strands of the copper filament, respectively. Krifi Cu-3, 4, and 5 were covered with polyethylene terephthalate (PET) fiber for insulation. It was determined that the electrical resistance of Krifi Cu-1 and 2 increased by <TEX>$40m{\Omega}$</TEX> and <TEX>$27.1m{\Omega}$</TEX>, respectively, with each <TEX>$5^{\circ}C$</TEX> increase over the temperature range of <TEX>$30-100^{\circ}C$</TEX>. In addition, it was found that the temperature-dependent electrical resistance did not increase with increasing number of copper filaments. Temperature-sensitive textiles were manufactured by patterning two conductive yarns with high increment and determining the linearity of the temperature-dependent electrical resistance. For the temperature-sensitive textile patterned with Krifi Cu-2, the average electrical resistance was <TEX>$71.4m{\Omega}$</TEX> but the electrical resistance was not linear with temperature. The temperature-sensitive textile patterned with Krifi Cu-2 showed an average electrical resistance of <TEX>$68.6m{\Omega}$</TEX> and good linearity with temperature.
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