Determination of UV protection coefficient in textiles by dual-beam UV spectrophotometer - Master's thesis - Dissertation

Determination of UV Protection Coefficient in Textiles Using a Double-Beam Ultraviolet Spectrophotometer

The UV protection coefficient of textiles is an essential parameter for evaluating the effectiveness of fabrics in blocking harmful ultraviolet radiation. This method typically involves the use of a double-beam ultraviolet spectrophotometer, which offers high accuracy and reliability in measuring UV transmittance through fabric samples. A UV-visible spectrophotometer, such as the UV-1800PC model, is widely used in various industries including textiles, semiconductors, optical materials, and multilayer films. When ultraviolet light interacts with a textile material, some of it is absorbed by the fibers, some passes through the fabric (including the gaps between fibers), and some is reflected. The higher the UV transmittance, the less protective the fabric is against UV radiation. To determine the UV protection capability, the fabric is exposed to ultraviolet light using a spectrophotometer as the radiation source. The light is dispersed by a monochromator, and the radiant flux passing through the fabric is measured using an integrating sphere. This allows for accurate calculation of the UV transmittance and ultimately the UV protection factor (UPF). Key words: UV-visible spectrophotometer; textile UV protection; analytical instrument; UV-1800PC dual-beam UV-visible spectrophotometer