chapter  28
16 Pages

Fabrics as UV Radiation Filters

Introduction 558

Fiber Distribution 558

Fiber Composition 559

Fiber Class Differences 559

Differences Within Natural Fiber Class 560

Differences Within Manufactured Fiber Class 561

Fabric Thickness 562

Dye Composition and Concentration 562

Comparison of Dyed Fabrics 562

Comparison of Dyes in Solution 564

UV-Absorbent Compounds 564

Optical Whitening (Brightening) Agents 564

Mill Applied 565

Detergent Ingredient Applied 565

Rinse-Cycle Fabric Softener Ingredient Applied 566

UV-Cutting Agents 566

Mill Applied 567

Detergent Ingredient Applied 568

Rinse-Cycle Fabric Softener Product Applied 569

Rinse Water Applied 570

Conclusion 570

References 571

INTRODUCTION

Engineering fabrics to increase their capability to filter solar radiation, especially

the UV portion, has been of interest for a number of years (1-18). The intent is to

label such fabrics and items made from them as solar (sun or UV) protective

clothing. The American Society for Testing and Materials (ASTM) standard

guide D6603 (19) defines UV-protective textile as “any textile whose manufac-

turer and/or seller claims that it protects consumers from ultraviolet (UV) light, claims the reduction of risk of skin injury associated with UV exposure, and/or uses a rating system that quantifies the amount of UV protection afforded”. The

purpose of this chapter is to describe the ways in which fabric can be enhanced to

improve its UV-filtering capability.