| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a scent-lingering fiber in which flavor lingers even if a long time is passed through after the absorption of a flavor component.SOLUTION: Provided is a method for lingering the flavor of a polyurethane based fiber to be cleaned where a flavor component is incorporated at least into either a softener for cleaning or a detergent is incorporated, in a polyurethane fiber in which the total of an urethane group concentration and an urea group concentration in a polyurethane based fiber is 1.48 to 3.0 mol/kg and also the urea group concentration is 0.61 to 2.39 mol/kg, and further, as a surfactant, only a nonionic surfactant having an HLB of 10 to 17 is incorporated into the detergent by 10 to 60 mass%.</p> |
