紫外线吸收剂在防晒织物中的应用

UV吸收剂的品种可以不断的改善纺织品的紫外线防护系数（UPF）。不同的产品可以用于浸渍、浸轧和印花工艺施加于织物上。本文试图总结有关UV防护织物上UV吸收剂应用的基本理论和回答一些未解决的问题。纺织物的UPF值是由组份纤维的化学结构及织物的组织结构特性所决定的。芳香纤维对UV-B段辐射有很好的过滤作用，但随着新开发的也可屏蔽UV-A段辐射的UV吸收剂的出现UPF值得到了巨大改善。对纤维反应UV吸收剂的应用可以进一步改善织物的UPF值，尤其当这些织物是印染成浅色调时，前提条件是它们具有低的孔隙率。

Application of UV Absorbers for Sun Protective Fabrics

The range of UV absorbers available today can permanently improve the Ultraviolet Protection Factors (UPF) of textiles. The different products can be applied by exhaust, padding or printing techniques. In this paper an attempt is made to summarise the basic facts and answer unsettled questions regarding the application of UV absorbers on UV protective fabrics. The UPF of a textile fabric is determined by the chemical structure of its constituent fibres and by its structural characteristics. Aromatic fibres provide a good filter for UV B rays, but the UPF can be improved markedly with a newly developed, specific UV absorber which also screens UV Arays. The application of a fibre reactive UV absorber can boost the UPF of fabrics especially if these are dyed or printed in pale shades, provided they have low porosity.