Toothbrush formed of a polyacetal resin

Details Toothbrush formed of a polyacetal resin Toothbrush formed of a polyacetal resin

A - Human Necessities

46

B

A46B 15/00 (2006.01) A46B 9/04 (2006.01)

Patent

CA 2136294

A toothbrush having a block head with bristles embedded in tuft holes by flat bars, a block handle for holding said toothbrush, and an elongated neck portion connecting said block head with said block handle, wherein said block head is at least 3 mm but at most 4 mm in thickness, the length from the bottoms of said tuft holes to a reverse surface of said block head is at least 0.2 mm but at most 2.2 mm, said tuft holes are 1.8 mm or more in depth and said toothbrush is formed of a polyacetal resin. Since a polyacetal resin is used as a material of a handle, a block head of a toothbrush is not broken or cracked even if a thickness of the block head is decreased. Resiliency of the material has made the use of the toothbrush in the mouth more convenient, provided good handleability in brushing, and improved the effect of cleaning the mouth. Owing to high mechanical strength, the handle is hardly broken or destroyed, and safety is secured. Owing to excellent chemical resistance, the material is not deteriorated by a flavor in a dentifrice or the like. Moreover, heat sterilization is possible, which is hygienically desirable.

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