| 摘要 |
PROBLEM TO BE SOLVED: To provide a toothbrush which shows an excellent cleaning effect on teeth, is distinguishable from the other toothbrushes, and enables a user to recognize the time to change the toothbrush easily, and to provide a method to manufacture the toothbrush efficiently. SOLUTION: A tapered part is formed at least at one end of a cut bristle made of a sheath-core polyester compound monofilament with a core and a sheath in different color tones. The tapered bristle is inserted into a base.
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