| 摘要 |
<p>A process for manufacturing a continuous dental floss brush comprising alternating portions of thread sections which do not stretch significantly under tension and brush sections which stretch under slight tension, including the step of coating at least the thread sections of a reverse twisted high tenacity nylon yarn (10) with a solution of polymer in a volatile solvent, the polymer being nylon, polyurethane or mixtures thereof. The thread sections of the yarn (10) are thereafter heated to vaporize solvent therefrom while the yarn (10) is maintained under a tension of 0.15 to 1 N. In the humidifier assembly (18) having a housing which defines a humidifier zone (20) the brush sections of the yarn (10) are exposed to a mixture of steam and gas while the yarn (10) is under tension. Finally, the brush sections of the yarn (10) are heated to remove solvent and passed through the humidifier zone (20) under controlled tension.</p> |
