Why does phenolic yellowing occur?

During the packaging, transportation or storage of textiles, the packaging materials contain phenolic antioxidant BHF (di-tert-butyl p-cresol, function: delay the degradation of plastic substances) and nitrogen oxides (NOX) in the air to form DTNP (2,6-Di-tert-butyl-p-nitrophenol) This substance. However, DTNP is very prone to sublimation and will migrate to textiles. Under alkaline conditions, DTNP will be converted into yellow anionic phenate, which will cause yellowing of textiles.

What colors are affected by phenolic yellowing?

The lighter the color, the greater the chance of phenolic yellowing, especially bleached colors.

Which fabrics are affected by phenolic yellowing?

Phenolic yellowing affects all fabrics, such as cotton and chemical fiber, especially nylon. Light-colored fabrics of chemical fibers are more sensitive to phenolic yellowing than cotton fabrics. Nylon swimsuits and other high-end clothing must be finished with anti-yellowing phenolic to improve the overall grade of the clothing and prolong its service life.