Determine the causes and measures of fabric yellowing

In general, the common yellowing in textiles mainly includes light yellowing and phenolsulfonation. The former refers to the yellowing of the surface of textiles caused by sunlight or ultraviolet light. The latter refers to the phenomenon of the yellowing of textile materials caused by the action of nitric oxide or phenolic compounds.

   Anti-yellowing measures

1. Consumers pay attention to maintenance during wearing.
   
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2. During the production process, strictly control the amount of fluorescent whitening agent to avoid exceeding the yellowing point of the fluorescent whitening agent.

3. During the finishing process, the setting temperature should not be too high. If the setting temperature is too high, the fabric will cause yellowing after setting. For fabrics containing spandex, the setting temperature should be below 150 degrees Celsius.

4. During the packaging process, the textile BHT turns yellow.

5. Anti-yellowing treatment of packaged finished products. For the packaged finished products or finished products stored in the warehouse, if there is a yellowing condition or the yellowing test is found to be unsatisfactory, the washing marks and hang tags are all good, and it is not easy to go into the water to deal with.

   In addition, if there is yellowing in the garment test, avoid using brown cardboard and plastic film packaging fabrics containing phenolic antioxidants, and require good ventilation during storage.

   In short, yellowing is an old problem that is common in textiles. Yellowing is produced in a variety of ways. By analyzing the original state of yellowing, judging the yellowing, and taking effective measures to produce yellowing, we can better improve the quality of the product and the performance.