| 摘要 |
PURPOSE: To obtain a yellowing-resistant fiber structure excellent in preventing effects on yellowing rich in durability to an extent so as not to visually observe the yellowing of the fibers without adversely affecting the hue of a dyed product by treating a polyamide-based fiber structure with a specific acid anhydride. CONSTITUTION: This yellowing-resistant polyamide-based fiber structure is obtained by treating a polyamide-based fiber structure such as nylon 6 or nylon 66 with a vapor phase and/or a liquid phase of an acid anhydride (the acid anhydride which is 100% liquid phase), preferably acetic anhydride, e.g. in the vapor phase or according to a dipping method. Thereby, the yellowing-resistant polyamide fiber structure, causing yellowing which isΔYI<1 visually unconfirmative yellowing index thereof with vanillin and excellent in durability is safely obtained at a low cost. As a result, the polyamide-based fiber structure, having the dyeability preferably within the range of -5<ΔL<5, excellent in properties of preventing the yellowing even after scouring and dyeing without causing the deterioration in dyeability and adversely affecting the hue by dyeing the fiber structure is obtained. |
