TOOTHBRUSH BRISTLE, TOOTHBRUSH USING THE SAME, AND METHOD FOR MANUFACTURING TOOTHBRUSH BRISTLE

摘要

PROBLEM TO BE SOLVED: To provide a toothbrush bristle which has a high entering property into a space between teeth and strength, and at the same time, can suppress an irritation to the gingiva, and has both of an excellent scraping force and durability, and also, can reduce pains at the time of use, to provide a toothbrush using the same, and also, to provide a method for manufacturing the toothbrush bristle.;SOLUTION: This toothbrush bristle includes a core section 2, and a sheath section 3 which concentrically covers the core section 2. At least one end side of the bristle is formed into a tapered section 1a, and the core section 2 is made of a resin containing a polybutylene terephthalate (PBT). At the same time, the sheath section 3 is made of a resin containing a polyethylene terephthalate (PET). At the tapered section 1a, the toothbrush bristle is formed in such a manner that the core section 2 may be exposed from the sheath section 3, and at the same time, the tapered shape is formed in a manner to continue to both of the core section 2 and the sheath section 3.;COPYRIGHT: (C)2008,JPO&INPIT