| 摘要 |
PROBLEM TO BE SOLVED: To obtain a dyed material of a polytrimethylene terephthalate fiber having excellent color fastness to light. SOLUTION: This dyed material of a fibrous structure composed of the polytrimethylene terephthalate fibers has >=3 rating color fastness to light by applying a triazine derivative and/or a benzotriazole derivative to the fibrous structure. |
