This test method covers the determination of the durability of the electro-conductive material used to make textile electrodes, used to monitor biometric signals, when subjected to perspiration exposure. This test method covers the determination of electrical resistivity of textile materials that are generally categorized as good or moderately conductive.
KeywordsSurface resistance; accelerated ageing; smart textiles;
One of the most present examples of smart garments products, already available on the market to customers, are bio-sensing garments which allow for the heart rate and respiration monitoring among other biophysical parameters. These garments are often made of compressive knit fabric in order to ensure a good contact between the textile electrodes and the skin. Therefore, there is a high level of intimacy between the garment and the human body. Moreover, one of the main markets for these garments are sportsmen and athletes, as they could get valuable information on their physical performance. The nature and use conditions of the garments involves an extensive exposure to perspiration. Most textile electrodes achieve surface conductivity by using metallic conductive elements (silver plated or else) which can show sensitivity to some chemicals including the salts which are found in human perspiration. It is then likely to provoke some degree of degradation which will translate as a higher surface resistance and ultimately complete loss of conductivity. The test method directly relates to the durability of the garment and will serve to test and compare smart garments integrating textile electrodes. Despite commercial examples of such product, there is currently no standardized test methods to evaluate on a common and objective basis the durability of such garment in its conditions of use. It would be valuable for consumers, especially considering these products are fairly expensive, to have a clearer understanding of the durability of these garments. The test methods will be used for quality control.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
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