| 摘要 |
PROBLEM TO BE SOLVED: To provide a bristle material for a toothbrush and the toothbrush which have touch, interdental cleaning performance, and tooth surface cleaning performance which are not in the conventional bristle material for the toothbrush. SOLUTION: The bristle material for the toothbrush consists of a cut bristle of a synthetic resin monofilament, wherein the cut bristle is constituted by forming tapered parts A and B at both ends of a body, respectively, the tip diameter of the tapered part A is within 2-20% of the diameter of the body, and the tip diameter of the tip B is within a range of exceeding 20% and less than 50% of the diameter of the body. COPYRIGHT: (C)2011,JPO&INPIT
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