Modifying the UV blocking effect of polyester fabric

The influence of conventional acid and alkaline high temperature dyeing procedures on fabric construction is investigated. The effects of weave construction, orange, red, and blue disperse dyes, double layers of fabrics, and UV absorber on the ultraviolet protection factors (UPF) of polyester fabrics are the topics of this research. A spectrophotometer with an integrating sphere is used to measure the UV transmittance of polyester fabrics according to an AATCC test. Small differences in the weight of fabrics after blind dyeing procedures already influence the UV transmittance of fabrics. Pale orange and blue dyed fabrics show a high enough UPF, while a pale red dyed fabric does not reach such values. Deep dyed and double layered fabrics and fabrics aftertreated with a UV absorber reach high UPF values.