PA610 Nylon

PA610 Nylon sits in the long-chain polyamide filament family, supplied as filament, drawn in round, triangular, cross-shaped, hollow and star-shaped sections and set in straight rows, helical, staggered, zoned and wavy fill patterns.

PA610 Nylon is used in custom cleaning brushes for wet-process rollers, tube brushes and cleaning heads that need lower moisture uptake than PA6 or PA66.

Where a project stalls on material choice, the comparison is normally against PA66 Nylon, Polypropylene PP and PBT, and it turns on moisture uptake and working temperature.

Compare PA610 Nylon with PA66, PP, PBT. Change material when wet stiffness, temperature, chemical resistance, conductivity, particle shedding, or surface marking becomes the limiting factor.

PA610 Nylon is medium to firm; Shore D about 70-80; balances flexibility and stiffness better than standard PA in wet applications. Use finer filament and longer trim for conformable contact; use coarser filament, shorter trim, or higher density for stronger displacement or cutting.

The published filament ranges, set against the grades it competes with. The finished brush is rated from the whole assembly: fill, anchoring and adhesive each have their own limit.

The part people get wrong: the number that decides scrubbing pressure is diameter over trim length, not the grade name. Two brushes in this material can behave nothing alike.

PA610 Nylon takes up 0.5–1.0% (24h, ISO 62/ASTM D570), rising to 2–3% at saturation, which is the figure that matters for anything left submerged.

PA6 and PA66 absorb moisture; PA610, PA612 and PA12 retain stiffness better in wet service; this moisture response matters in wet-process rollers, tube brushes and cleaning heads that need lower moisture uptake than PA6 or PA66.

What this means for your application: water changes the working diameter and the spring rate together, so wet performance has to be checked rather than assumed from a dry trial.

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.

Grade-dependent. For standard engineering brush filaments, Perlon gives a general maximum continuous working range of about 80–100°C; confirm the exact PA610 filament grade before sustained hot service.

Published melting point is 210–220°C. That is a material property, not an operating ceiling, and using it to justify a hot wash is the fastest way to ruin a brush.

Where it stops working: If the filament takes a permanent set under load, step up to PBT or PA66 Nylon, 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 PA610 Nylon 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 0.05–2.50 mm is the working range.

Free trim runs 3–250 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 0.05–0.66 mm for light wiping, dusting and surfaces that mark easily, and 0.66–2.50 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.

Wet-process rollers, tube brushes and cleaning heads that need lower moisture uptake than PA6 or PA66.

The cleaning work it is specified for most often:

• Medical Instrument Cleaning
• CPAP Hose Cleaning
• Dental Tool Cleaning
• Laboratory Tube Cleaning
• Glass Surface Cleaning
• Solar Panel Cleaning

Brush types built with this fill:

• Custom Handheld Detail Brushes
• Custom Roller and Conveyor Brushes

If the sample comes back rejected: PA610 improves wet stability over PA6 or PA66 but still has less chemical and heat margin than PEEK, PPS or PTFE.

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 PA610 Nylon 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. Perlon lists PA6.10 in its brush range but gives the temperature guidance as a general engineering-filament range rather than a PA610-specific number.