The results of investigating composite materials based on polypropylene and polyethylene terephthalate that contain different bioactive silver-containing additives developed for the production of bioactive synthetic fibres are presented. Investigations of the migration of silver from polymer fibre materials into water showed that the lowest silver concentration in aqueous abstracts is observed when cluster nanosilver is used as the bioactive additive, which provides the fibre with prolonged bioactivity at low toxicity.
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