DuPont Nylon Filament

DuPont Nylon Filament is a legacy brand name rather than a distinct polymer — PA6, PA66 or another polyamide supplied under a named commercial grade. Specify the polyamide type and the diameter, because the brand alone fixes neither.

DuPont Nylon Filament is used in custom cleaning brushes for hand, strip, tube, roller and machine brushes made with a named DuPont polyamide grade selected for the service.

It is usually weighed against PA66 Nylon, PA610 Nylon and PA612 Nylon, and the deciding difference is moisture uptake rather than anything you can read off the name.

Compare DuPont Nylon Filament with Verified PA6, PA66, PA610, PA612, PA12, PBT. Change material when wet stiffness, temperature, chemical resistance, conductivity, particle shedding, or surface marking becomes the limiting factor.

DuPont Nylon Filament is medium to firm across available brush-filament grades. Use finer filament and longer trim for conformable contact; use coarser filament, shorter trim, or higher density for stronger displacement or cutting.

Filament-level figures for this grade and the ones it is usually compared to. The brush built from it is rated lower: the anchoring and the adhesive give out before the filament does.

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.

DuPont Nylon Filament takes up 0.3–10% by grade.

PA6 and PA66 absorb moisture; PA610, PA612 and PA12 retain stiffness better in wet service; this moisture response matters in hand, strip, tube, roller and machine brushes made with a named DuPont polyamide grade selected for the service.

What this means for your application: absorbed water swells the filament and drops contact pressure, so a brush that reached the far end of a bore when dry may stop short once it is wet.

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 depends on the specific nylon type and grade; confirm whether the filament is Nylon 6, 6.6, 6.10, 6.12 or another grade before setting a service limit.

The filament tables quote 120°C continuous and 150°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: 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.

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

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

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: Specify the exact DuPont Nylon 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.

The floor is roughly 0.075 mm; finer than that and the filament snaps rather than flexes. In practice you are choosing inside 0.075–2.50 mm.

Free trim runs 3–300 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 0.075–0.68 mm for light wiping, dusting and surfaces that mark easily, and 0.68–2.50 mm where residue is packed on and point pressure matters more than surface risk.

Tip treatments available on this filament: end rounding, tapered-tip grinding, silicone-oil coating, anti-static coating and antibacterial coating.

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.

Hand, strip, tube, roller and machine brushes made with a named DuPont polyamide grade selected for the service.

Where it turns up in practice:

• Industrial Machine Cleaning
• Dust Removal
• Brick, Tile & Building Material Machine Brush Use
• Laboratory Tube Cleaning
• Household Dish, Teapot & Kitchen Detail Cleaning
• Carpet Machine Cleaning

It is normally set into these constructions:

• Custom Handheld Detail Brushes
• Custom Tube & Pipe Bore Brushes
• Custom Roller and Conveyor Brushes
• Custom Polishing Buffing Wheels

The trade-off: The commercial phrase cannot by itself support authenticity, food contact, stiffness, heat, chemical or lifetime claims.

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 DuPont Nylon 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: 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.

Source: Perlon — Synthetic Brush Filaments. Public manufacturer or material data supports the material form and performance direction used on this page. Functional/profile labels do not replace grade-specific thermal data. Functional/profile labels do not replace grade-specific thermal data.