Pearlescent Effect Pigments for Coatings on Textiles – Part I: Protective Materials Against UV Light and IR Light
Lena Charlyn Greiler and Boris Mahltig
Niederrhein University of Applied Sciences, Faculty of Textile and Clothing Technology, Webschulstr. 31, 41065 Mönchengladbach, Germany
Abstract: For UV-light (ultraviolet light) and for IR-light (infrared light) a negative impact on human health is reported. Materials containing a decreased transmission for IR-light are often also used for applications related to heat management and thermal insulation. According to these statements, the current paper reports on coatings for textiles which can decrease the transmission for both types of light (UV-light and IR-light). To realize the demanded effect, these coatings are prepared using pearlescent effect pigments containing silica SiO2 and titania TiO2. These pigments support a decrease in UV-transmission, because of the absorption of UV-light by the TiO2 component. Further, the transmission for UV-A light and near-IR light (near-infrared) is decreased by interference effects. The developed materials give a proof-of-concept that the combination of UV and IR protection is possible by one single coating material. In future such textile materials can be part of concepts for sun protection and heat management.
Keywords: Effect pigment, interference, transmission, sun protection.