... dimensional stability, good bend recovery PBT Filament for Toothbrush Toothbruh Filament PBT tapered filament is divided into ... And Double tapered PBT filament is used for processing toothbrush and cosmetic brush ,etc. 1.Technical Parameter :- ... Cosmetic brush filament, Shaving brush filament, Nailbrush filament,- Toothbrush filament,- Paintbrush filament,- Carwash brush filament,- Strip brush ...