| 摘要 |
<p>Disclosed is an interdental brush, in which filaments are implanted by sandwiching the filaments between folded-back wires and by twisting same. The interdental brush can improve not only the falling strength but also the cleaning effect and the detail reachability of the filaments. The filaments (3) are formed into a polygonal sectional shape, in which at least one internal angle (31) is made acute at 30 to 75 degrees. Specifically, the acute angle portion (31) has an angle (?3) set at 1.2 to 3 times as large as the twist angle (?4) of the wires. The filaments have two or more acute angle portions, and are densely implanted and clamped in a laminate state of two or more rows between the wires.</p> |
