A metallised coating onto the surface of the fibre or yarn, or within a bi component yarn (Fig. 13.2) has an antimicrobial effect. Complexing compounds, based on metals such as silver, copper or mercury cause inhibition of the active enzyme in the pathogen, effecting the bacteria's metabolic rate, thus rendering it unable to replicate or function.
The most popular coated yarns use silver or copper. These remain flexible and usable in the textile structure and are generally noted as having permanent functionality.
13.2 Yarns with S and Z twist.
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