Antistatic PBT Filament

In the functional polyester family, Antistatic PBT Filament is specified, supplied as filament, strip fill, roller fill and molded blade or foam pad as applicable, drawn in round, triangular and cross-shaped sections and set in straight rows, staggered, zoned and helical fill patterns.

Antistatic PBT Filament is a custom brush contact material selected by filament or blade geometry, temperature, moisture, chemicals and surface risk.

Change material when temperature, chemicals, static, shedding or surface marking becomes limiting.

Antistatic PBT Filament is shore D 80–90. It Brush behavior follows Medium to High Flexibility flexibility and Shore D 80–90 hardness.

The part people get wrong: the same grade can feel soft or aggressive depending on diameter, trim and density. Specify that geometry before the material, or the sample will surprise you.

Antistatic PBT Filament takes up 0.05–0.25% (ISO 62/ASTM D570).

PBT normally has low moisture uptake, but antistatic compounds vary; confirm the selected filament grade and test method.

What this means for your application: moisture uptake is low enough to ignore in service, which is why this grade holds its stiffness through washdown.

A practical check: run one wet cycle and compare tip contact against the dry state. If the wet brush leaves residue behind or no longer reaches the bottom of the bore, change the material rather than the geometry.

Temperature capability follows the actual antistatic PBT compound. Conductive or antistatic additives can change the base-polymer properties, so confirm the selected filament grade.

The filament tables quote 120–140°C continuous and 160–180°C peak. The tighter number above is the one to build to, because a brush is loaded while it is hot.

Where it stops working: validate with a sample if the process sits near the top of that band. A permanent bend under load means the answer is a higher-temperature filament family, not a heavier trim.

Diameter, trim length and applied load all shift the real limit, so a thin filament touching lightly survives conditions that would flatten a thick one under pressure.

Grade dependent; check the selected antistatic PBT compound against the exact chemical, concentration, temperature, exposure time and load.

Compatibility is a function of concentration, temperature and contact time together. A short rinse in a dilute solution is a different exposure from an overnight soak in a concentrated one, even with the same chemical on the label.

Before you commit to a quantity: Use resin or alloy grade TDS, ISO/ASTM property method and lot traceability when specified.

The floor is roughly 0.03 mm; finer than that and the filament snaps rather than flexes. In practice you are choosing inside 0.03–1.00 mm.

Free trim runs 2–150 mm, and the two interact: a finer filament needs a shorter trim to keep useful stiffness, while a thicker one carries a longer trim and still lands pressure on the tip.

Split the range by duty: roughly 0.03–0.27 mm for light wiping, dusting and surfaces that mark easily, and 0.27–1.00 mm where residue is packed on and point pressure matters more than surface risk.

Tip treatments available on this filament: permanent anti-static masterbatch, surface anti-static coating and end rounding.

In practical brush terms: reaching deep into a bore or crevice is a diameter problem before it is a length problem. A thicker filament on a moderate trim pushes further in before the tips fold over.

Custom cleaning brushes requiring Anti-Static PBT Filament for its mechanical, temperature, moisture or chemical behavior.

Where it turns up in practice:

• Connector & Slot Cleaning
• PCB Cleaning
• Dust Removal
• Brick, Tile & Building Material Machine Brush Use
• Carpet Machine Cleaning
• Mold Cavity Cleaning

It is normally set into these constructions:

• Custom Roller and Conveyor Brushes
• Custom Handheld Detail Brushes
• Custom Strip Seal Brushes

If the sample comes back rejected: Electrical behavior and mechanical properties depend on the antistatic package, humidity, grade, filament geometry and process conditions.

Send the brush type, filament diameter, free trim length, density, contact setting, wet or dry duty, working temperature and the actual cleaning chemistry together. Any one of them on its own leaves the stiffness undefined.

What usually goes wrong at this step:

• Selecting only by material name without defining diameter, trim, density, engagement and operating conditions

Reference standards behind the figures on this page: ISO 527-1:2019; ASTM D638; ISO 62:2008; ASTM D570-22; ISO 868:2003; ASTM D2240-15(2021); ISO 4892-3:2024; ASTM G154-23; UL 94; IEC 61340-5-1:2024; IEC TS 61340-5-4:2021; ASTM D257.

Source: Material manufacturer TDS / ISO / ASTM / industry reference — PBT-ESD material property compilation. Structured values from update package; water absorption references ISO 62/ASTM D570 where applicable; UV references ASTM G154; remaining brush-process values marked.