Yellowing, also known as yellowing, refers to the phenomenon that the surface of white or light-colored materials turns yellow under environmental conditions such as light and chemicals.
Generally speaking, the common yellowing in single jersey knit fabric mainly includes light yellowing and phenolic yellowing. The former refers to the yellowing of the single jersey knit fabric surface caused by sunlight or ultraviolet light, and the latter refers to the yellowing of the textile fabric due to the action of nitrogen oxides or phenolic compounds.
1. During the wearing process, consumers should pay attention to maintenance.
2. In the process of production and processing, strictly control the dosage of the 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 turn yellow after setting. For fabrics containing spandex, the setting temperature should be lower than 150 degrees Celsius.
4. During the packaging process, the textile BHT turns yellow.
5. Anti-yellowing treatment of packaged products. For the packaged finished product or the finished product in the warehouse, if there is yellowing or the yellowing test is found to be unqualified, and the washing label and hang tag have been fixed, it is not easy to go into the water for treatment.
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 common to single jersey knit fabric, and there are many kinds of yellowing. By analyzing the original appearance of the yellowing, judging the yellowing, and taking effective measures to prevent the yellowing of the textile, the quality and performance of the product can be better improved.