MANUFACTURING METHOD OF TOOTHBRUSH HAVING NEEDLE-SHAPED BRISTLE AND A TOOTHBRUSH MANUFACTURED IN THE SAME METHOD

摘要

A manufacturing method of a toothbrush having needle-shaped bristles and the toothbrush produced by the same are provided to produce the toothbrush without a chemical treatment process by using bristles made of all kinds of materials and to prevent the waste water. In a bristle tapering method for tapering bristles(40) by grinding the bristles by a polishing machine, the end portions of the general bristles that are not tapered are polished by a drum-type polishing machine provided with projections(11) with the height of 1.5~7mm and vertically rotated at the same time. A gap between the projections is 1~5mm. A diameter of the end portion of the bristle is 0.01~0.02mm and the tapered length is 3~7mm. The projections of the drum-type polishing machine are not arranged in parallel with the rotational direction of the polishing machine.