| 摘要 |
PROBLEM TO BE SOLVED: To provide an interdental cleaning tool which has excellent properties for insertion into an interdental portion and can ensure sufficient cleaning properties in a state in which saliva interposes.SOLUTION: An interdental cleaning tool 1 includes: a handle base material 11 formed of synthetic resin; and a cleaning part 2 formed by externally attaching a cleaning body 21 made of elastomer on a core part 12 having a shape of an elongated shaft of the handle base material 11. The cleaning body 21 includes: a cover part 21a formed to a tip of the core part 12; and plural protrusions 21b for cleaning protruding outward from the cover part 21a. The cleaning body 21 is constituted by styrene-based thermoplastic elastomer having a contact angle with respect to water of 75°-95° and Shore A hardness of A30-A50. When a dynamic friction coefficient in a state of interposing no water in a cleaning portion 2A is defined as μd and a dynamic friction coefficient in a state of interposing water is defined as μw, a relational expression of 0.9×μd≤μw is satisfied between both dynamic friction coefficients.SELECTED DRAWING: Figure 1 |
