Optical brighteners(OB) are chemicals that absorb ultraviolet light and re-emit it as visible blue light, making materials appear whiter and brighter. In non-woven fabrics, they are added to improve the overall visual appeal and make the fabric look cleaner and more vibrant.

Non-woven fabrics are used in various applications where visual aesthetics matter, such as medical textiles, apparel, and home furnishings. The addition of OB masterbatches can enhance the fabric's visual appeal, making it more attractive to consumers.

In addition to improving whiteness, OB masterbatches can also help correct off-white or yellowish hues in non-woven fabrics, ensuring they meet the desired color specifications.