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What is phenolic yellowing?

Views: 1000     Author: Site Editor     Publish Time: 2021-12-29      Origin: Site


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Light-colored, especially white textiles, will turn yellow on the surface during storage (also known as "yellowing"), which is more common in the storage process based on plastic packaging. There are many reasons for the yellowing of textiles. The yellowing that occurs after packaging is called "phenolic yellowing".

Why does phenolic yellowing occur?

In the process of packaging, transportation or storage of textiles, packaging materials contain phenolic antioxidant BHF (di-tert-butyl-p-cresol, function: delay the degradation of plastics) and nitrogen oxides (NOX) in the air react to form DTNP (2,6-Di-tert-butyl p-nitrophenol) This substance. However, DTNP is 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 does phenolic yellowing affect?

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

Which fabrics does phenolic yellowing affect?

Phenolic yellowing has an impact on all fabrics, such as cotton, chemical fiber, etc., especially nylon. Light-colored fabrics of chemical fiber are more sensitive to phenolic yellowing than cotton fabrics. High-end clothing such as nylon swimsuits must be finished with anti-phenolic yellowing to improve the overall quality of the clothing and prolong the service life.

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