Innovative UV barrier materials made of organic cotton dyed with natural dyestuffs

The paper presents the results of research works on ecological materials that protect humans against the harmful effects of ultraviolet (UV) radiation, made of organic cotton, obtained through the application of selected natural dyes and a new reactive UV absorber with high molar absorption. These materials are intended for clothing, in particular for children and people with photosensitive skin. Instrumental evaluation of obtained colours and barrier properties of textile products for UV radiation were performed, expressed in the UPF (Ultraviolet Protection Factor) value, determined on the basis of measurements of UV transmittance by a textile product. Due to the application area of the new materials, the colour fastness to washing, perspiration, friction and artificial light. For selected newly developed organic cotton products containing in their structure a natural dye and a new UV organic absorber, specialized irritation tests according to OECD were carried out. In addition, the results of studies on antimicrobial properties are presented on the basis of the assessment of antibacterial activity against Gram (+) Staphylococcus aureus and Gram (-) Escherichia coli.