... its heat-resisting performance, climate-resisting performance, electric performance and bearing electric performance are good. Because of its moisture ... more economical,generally PBT filament is used for processing toothbrush, food-industry brushes, paint brush and cosmetic brush, ... And Double tapered PBT filament is used for processing toothbrush and cosmetic brush ,etc.2.Spec. Raw MaterialPBTDiameter ...