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http://dx.doi.org/10.12940/jfb.2019.23.2.1

Comparisons of Electrical Conductivity between Polyester/Polyurethane and Nylon/Polyurethane Woven or Knitted Fabrics with Silver Paste Patterns in Elongation-Strain test  

Kim, Hyejin (Dept. of Fashion Industry, Ewha Womans University)
Yun, Changsang (Dept. of Fashion Industry, Ewha Womans University)
Kim, Jongjun (Dept. of Fashion Industry, Ewha Womans University)
Publication Information
Journal of Fashion Business / v.23, no.2, 2019 , pp. 1-17 More about this Journal
Abstract
The objective of this study was to investigate electrical conductivity of fabrics from polyester (PET) and Nylon (N) containing polyurethane (PU), with silver paste patterns screen-stenciled in three directions. The PET/PU and N/PU fabrics knitted or woven were uniaxially strain-recovered up to 22.5% in three times when each change in electrical resistance was simultaneously measured. This study established four variables that complexly affected electrical conductivity of these specimens; fabric structures, components, cover factors, and the percolation of silver particles. The woven or knitted fabric structures did not distinctively cause the changes in electrical resistance, however, the woven fabrics with the diagonal patterns showed their relatively high electrical resistance. The PET/PU fabrics with increasing the PET proportion generally presented the opposite propensity to its electrical conductivity. The changes in electric resistance of the PET/PU 85/15 2/1 twill and double plain fabrics instantaneously responded to the rate of elongation. The PET/PU group exhibited a reverse correlation between its cover factor and electrical resistivity. The highest electrical conductivity of the PET/PU 95/5 interlock fabric, with very few fluctuations, was attributed to the deep percolation of the silver particles that bridged the gaps between one loop and another. On the other hand, the occurrence of the silver cracks along with the elongated direction led to the immeasurably high change in electrical resistance as the strain increased.
Keywords
polyurethane; polyester; nylon; electrical resistance; elongation-strain;
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