Round toothbrush bristles and processing method thereof
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United States of America Patent
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May 1, 2012
Grant Date -
Apr 12, 2012
app pub date -
Aug 26, 2009
filing date -
Jun 12, 2009
priority date (Note) -
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Abstract
Disclosed herein is a method of processing rounded toothbrush bristles using synthetic bristles. The method includes cutting one end of a filament bundle of synthetic bristles, mechanically polishing the cut end of the filament bundle of synthetic bristles, heat treating the polished end of the filament bundle of synthetic bristles, and caustisizing the heat-treated end of the filament bundle of synthetic bristles into a round shape. In this method, at least one end of the toothbrush bristle is softly rounded to protect gum damage due to irritation of the one end of the toothbrush bristle and to provide a gum massaging effect for healthy gum with the rounded end of the toothbrush bristle.
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