Fluorescent brighteners are widely used in cotton products and are mainly used to improve the whiteness and brightness of cotton fibers and their products. By combining with cotton fiber, the fluorescent whitening agent can absorb ultraviolet light and emit blue-purple fluorescence, thereby neutralizing the yellow color of the fiber itself and making the product visually whiter and brighter. It is especially suitable for processing and whitening of cotton textiles. The use of fluorescent brighteners not only improves the appearance quality of cotton products, but also enhances their market competitiveness.

Fluorescent brighteners for cotton and dyeing

The application of fluorescent brighteners in polyester products is different from cotton products, mainly aiming at the characteristics of polyester fibers that are prone to yellowing under high temperature and ultraviolet exposure. As a synthetic fiber, polyester structures are more susceptible to yellowing due to the influence of heat and light. Fluorescent brighteners can effectively neutralize yellow tones and keep polyester products white and bright by absorbing ultraviolet light and emitting blue and violet light. Compared with cotton fiber, polyester has more stable chemical properties. Therefore, the brighteners used on polyester must have good high temperature resistance and light fastness to ensure lasting whitening effect.

Fluorescent brighteners for polyester

The application of fluorescent brighteners in wool, acrylic fiber and acetate fiber is different from polyester and cotton, mainly because they have higher requirements for dye affinity and yellowing treatment. These fibers are prone to yellowing, and fluorescent brighteners effectively neutralize the yellow tone by absorbing ultraviolet light and emitting blue-violet light. Compared with polyester, wool and acrylic fiber require better dyeing compatibility, light resistance and washing resistance; compared with cotton, the chemical structure of these fibers is more complex, and the whitening treatment requires higher stability and durability.

Fluorescent brighteners for Wool/Nylon and acrylic fiber