Why Does 0.15mm Decide the Quality of a Toothbrush?
Look Closely at Your Bristles
Examine a quality toothbrush under light. Each bristle doesn't end flat — it tapers to a point so fine it's barely visible.
That's tapered filament technology, and it determines cleaning performance, comfort, and product lifespan.
Material: Why PBT at 0.15mm?
Premium filaments use PBT (Polybutylene Terephthalate), outperforming nylon in three key areas:
Property | PBT | Nylon |
Elastic recovery | Excellent — springs back | Moderate — flattens over time |
Moisture resistance | Stable when wet | Absorbs water, loses stiffness |
Flex balance | Tunable, comfortable | Generally stiffer |
At 0.15mm diameter, these are soft bristles that clean effectively without damaging enamel or gums.
Tapered Tip Science
Each filament has three engineered zones:
- Root (≈65%) — full diameter for rigidity and snap-back
- Transition (≈25%) — gradual flex, no kinking
- Tip (≈10%) — reduces to 0.01–0.03mm, reaching gingival sulcus and interproximal gaps Finer tips clean deeper and feel softer — the core advantage of tapered bristles.
Double-end Tapered: Smarter Manufacturing
Standard filaments taper one end only, requiring precise orientation during tufting.
Double-end tapered filaments have both ends processed:
- Zero orientation risk on automated lines
- Lower scrap rates, higher throughput
- Consistent quality across every brush head
Two Colours, One Standard
Sky Blue — fresh, clean aesthetic; ideal for children's, family, and sensitive-gum lines. Excellent colour fastness.
Classic Black — carbon-black masterbatch adds UV stability and abrasion resistance; preferred for adult premium
and men's care ranges. High contrast makes cleaning visible.
Both use masterbatch pigmentation (not surface coating) for uniform, long-lasting colour.
The 28mm Length
Calibrated for standard adult heads: 6–8mm anchored, 20–22mm working length, 4–6mm tapered tip zone. The proven balance of flex and control.
What This Means for Your Brand
- Better cleaning — tapered tips reach where flat bristles can't
- Consumer comfort — soft on gums, firm on plaque
- Manufacturing efficiency — double-end design cuts waste
- Brand flexibility — two colours, two market positions
The filament is invisible to consumers — but its quality is felt twice daily. That's where competitive advantage lives.
0.15mm × 28mm Double-end Tapered PBT Filament. Sky Blue and Classic Black.
Samples and technical datasheets available on request.
