Original scientific article
Published Online 29 January 2019
Measurement of electrical resistance of textile materials, fiber and fabrics included, remains always an engaging task due to sensitivities to interference of multiple factors. Difficulty stands on both finding a method of measurements that fits the requirements of samples to be tested and the most appropriate indicator describing this property. Actually, numerous methods and indicators are used for different sample content and shape (fibers, roving, yarn or fabric, etc.), even when material tested is the same. Different methods usually use indicators that produce results difficult to compare with each other or to interpret or do not express intrinsic qualities of their constituent materials. The same situation stands for leather materials. In this paper, we propose a new method and indicator, multiple steps method and electrical resistivity, which takes in consideration compressional properties of leather sample and produce results independent from the amount and form of the sample. Electrical resistivity of conductive leather, as defined below is shown to be an inherent indicator of bulk conductivity of leather assembly and is not influenced by sample form or the way it is placed within the measuring cell. The method is used for the first time to evaluate changes in electrical resistivity leather after different chemical processing to make it electro-conductive. The taken data provide important information about the evolution of electro-conductive properties of leather at different stages of processing and influence of environmental conditions on it.
Conductive leather, electrical resistivity, multiple step method
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