Material
Flagged Polyester Filament
Flagged polyester filament
Flagged polyester is polyester filament whose tips are split into fine branches. The split tips multiply the contact points at the surface, so the brush picks up fine dust and holds liquid far better than a plain filament of the same size. It sweeps and wipes; it does not cut.
Datasheet values
- Base filament diameter
- 0.15–0.60 mm with split flagged tips
- Temperature range
- -20–100°C
- Stiffness
- Soft to medium; high tip density
What is flagged polyester filament?
A polyester monofilament, about 0.15–0.60 mm across, whose ends are mechanically split into several finer tips. That gives a soft to medium brush with a very high tip count at the surface, and a service temperature of about -20 to 100°C.
Why flag the tips?
Each split tip touches the surface separately, so a flagged tuft reaches into fine texture, picks up dust and powder, and holds liquid between its branches. The brush feels softer than its base filament, while the unsplit shaft keeps it springy.
Where is it used?
In our range: prepreg surface cleaning brushes, synthetic wool wheel brushes, CPAP hose and tube brushes, dairy equipment brushes, spring tube brushes and PBT tube and bore cleaning brushes.
Where does it fall short?
The fine split tips load up with sticky residue and are hard to rinse clean, and they wear faster than plain filament. It is not used for aggressive scrubbing or cutting; a plain nylon or PBT fill is better there.
How hot can it run?
As hot as the polyester grade allows; flagging changes the tip shape, not the polymer’s service limit. The cited range is about -20 to 100°C.
What should you tell us?
The surface and what the brush picks up, wet or dry use, the base filament size and trim, and the brush form. A sample brush is the best guide to the softness you want.
Questions buyers ask about Flagged Polyester Filament
What is a flagged bristle?
A filament whose tip is split into several finer branches, which picks up fine dust and holds liquid better than a plain tip.
Are flagged bristles good for sticky residue?
No. The split tips load up and are hard to rinse; use plain nylon or PBT for sticky soil.
Do flagged bristles feel softer?
Yes. The split tips feel softer than the base filament, while the shaft keeps the brush springy.
Where these figures come from
| Property | Published value | Source |
|---|---|---|
| Published specification |
|
Perlon Retrieved 2026-07-22 |
Guides that go deeper on this
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Share what the brush works on, the temperature and chemicals it meets, the form you need — strip, disc, roller or hand brush — the quantity and a drawing or photo.
We reply to every request within 24 hours, with a quotation or with the questions we need answered first. If the brush can be made on our existing tooling, we make the sample directly. If it needs new tooling, we quote a sample fee and a tooling fee, and the sample fee is credited against the bulk order. Need an NDA first? We sign yours before you send drawings, and the files you send are never shown to other customers.
- MOQ500 pcs for small hand-held brushes, 100 pcs for medium and large ones
- SampleTypically 3–7 days
- ProductionFrom 7 days after sample approval, by size and quantity
- Payment30% deposit and 70% before shipment above US$10,000; smaller orders on agreed terms
“We need a brush to remove wet residue from a stainless steel conveyor, about 800mm wide. The current brush wears quickly. We can send photos.”
“We sell drinkware and need a cleaning brush to include with the product. Quantity around 5,000 pieces.”