Anti-static Filament

Anti-static Filament belongs to the functional synthetic filament group, supplied as inherently dissipative polymer filament, additive-modified nylon or polyester and conductive-fiber blend, drawn in round, triangular and cross-shaped sections and set in straight rows, staggered, zoned and helical fill patterns.

Anti-static Filament is used in custom cleaning brushes for static-control contact on paper, film, textile and electronics lines when the complete brush has a defined grounding path.

The realistic alternatives are Conductive Nylon and Carbon Fiber. What separates them here is moisture uptake and working temperature, not headline strength.

Compare Anti-static Filament with Conductive nylon, carbon fiber, metal fiber, ordinary nylon. Change material when wet stiffness, temperature, chemical resistance, conductivity, particle shedding, or surface marking becomes the limiting factor.

Anti-static Filament is defined by the carrier polymer, diameter and trim; electrical classification does not describe brushing stiffness, and Anti-static Filament changes brush stiffness through filament diameter, free trim, density, crimp, and contact. Use finer filament and longer trim for conformable contact; use coarser filament, shorter trim, or higher density for stronger displacement or cutting.

Published ranges for the filament itself. Read them as a shortlist tool, not as brush performance.

The part people get wrong: stiffness is not a property of the material on its own. A 0.50 mm filament on a 15 mm trim is stiffer than a 0.30 mm filament on a 25 mm trim in the same grade. Fix diameter and trim first, then confirm the material.

Anti-static Filament takes up 0.5–2.5% (Depending on Nylon Base Material, ISO 62/ASTM D570).

PA6 and PA66 absorb moisture; PA610, PA612 and PA12 retain stiffness better in wet service; this moisture response matters in static-control contact on paper, film, textile and electronics lines when the complete brush has a defined grounding path.

What this means for your application: the filament grows and softens as it takes on water, and tip pressure goes with it. The reach you measured dry is not the reach you get wet.

A practical check: soak a sample for an hour and re-measure the trim. If it has moved enough to change the contact band, the grade is wrong for the duty.

Temperature capability follows the carrier polymer and additive package; confirm the actual anti-static filament grade rather than using one generic temperature limit.

Design to that answer rather than to a raw-material datasheet figure: a brush rating already accounts for filament working under load rather than raw polymer sitting in an oven.

Where it stops working: validate with a sample if the process sits near the top of that band. If the filament takes a permanent set under load, step up to Carbon Fiber, which hold a higher continuous temperature.

The usable limit also moves with diameter, trim and contact pressure. A fine filament under light load tolerates more than a thick one under heavy scrubbing.

It stands up to water, oils, mild detergents and dilute alkalis.

What degrades it: strong mineral acids, phenols and strong oxidizers.

The same cleaner can be harmless or destructive depending on how strong it is, how hot it runs and how long it sits. Quote the concentration and the dwell time, not just the product name.

Before you commit to a quantity: Specify the exact Anti-static Filament grade or alloy, filament or profile size, color, straight or crimped form, working temperature, wet or dry use, chemical exposure, surface finish, and any required material documentation.

About 0.05 mm. Below that the filament turns fragile and breaks under ordinary contact pressure, so 0.05–1.00 mm is the working range.

Free trim runs 3–150 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 0.05–0.29 mm for light wiping, dusting and surfaces that mark easily, and 0.29–1.00 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.

Static-control contact on paper, film, textile and electronics lines when the complete brush has a defined grounding path.

The applications that keep coming back to this grade:

• Brick, Tile & Building Material Machine Brush Use
• Carpet Machine Cleaning
• Mold Cavity Cleaning
• Dust Removal
• Household Dish, Teapot & Kitchen Detail Cleaning
• Tile Grout Cleaning

The constructions that usually carry it:

• Custom Roller and Conveyor Brushes
• Custom Strip Seal Brushes
• Custom Handheld Detail Brushes
• Custom Tube & Pipe Bore Brushes

The trade-off: The word anti-static alone cannot prove ESD protection, ATEX suitability, cleanroom suitability or lifetime conductivity.

A usable specification carries the construction, the filament diameter and free trim, the density and contact setting, and the service conditions: wet or dry, temperature, and what the cleaner actually is.

The mistakes that most often send a sample back:

• Selecting Anti-static Filament from the material name alone without setting filament diameter, trim length, and density
• Using dry stiffness to predict wet behavior without checking moisture absorption or liquid exposure
• Ignoring trapped abrasive particles, chemical concentration, temperature, or contact motion when assessing surface risk

Reference standards behind the figures on this page: IEC 61340-5-1:2024; IEC TS 61340-5-4:2021; ASTM D257.

Source: Electrostatic Discharge Association — ESD fundamentals. Anti-static is a resistivity range, not a yes or no property. Decide the target band from the ESD control programme the brush will work inside, then specify the filament to it.