Material
PA612 Nylon
PA612 Nylon is selected from its stiffness, recovery, wear, wet-service, chemical, and temperature behavior. To define stiffness, confirm the material together with filament diameter, free trim length, density, grade, and service conditions.
Material Overview
PA612 is a long-chain polyamide with lower water absorption than PA6 or PA66 and resistance to many oils, fuels, cleaners and saline solutions.
In a finished brush, PA612 Nylon does not create a fixed stiffness by itself. Filament diameter, trim length, density, tuft layout, and installed contact determine working force, while grade and environment affect durability and recovery.
Material Properties
| Density | 1.06–1.07 g/cm³ |
|---|---|
| Melting point | 212–218°C |
| Water absorption at 50% RH | 1.2–1.3% |
| Water absorption at saturation | about 3% |
| Wet stiffness retention | about 70–75% |
| Filament diameter | 0.075–2.50 mm |
Brush Applications
For PA612 Nylon, directly related brush structures include Tube & Pipe Bore Brushes, Handheld Detail Brushes, and Roller and Conveyor Brushes. Applications related to PA612 Nylon include CPAP Hose Cleaning, Laboratory Tube Cleaning, Pipe Robot Brush Attachment Use, and Hose Cleaning.
Specification and Customization
Material form
Filament
Common forms
Filament.
Grade
Low-moisture-absorption PA612 brush-filament grade
Reference standard
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
Limitations and Alternatives
PA612 costs more than general PA6 and should be used where its wet stability, recovery or wear life creates a real process benefit.
Frequently Asked Questions
What are the key properties of PA612 Nylon brush material?
PA612 is a long-chain polyamide with lower water absorption than PA6 or PA66 and resistance to many oils, fuels, cleaners and saline solutions. Direct data: Density: 1.06–1.07 g/cm³; Melting point: 212–218°C; Water absorption at 50% RH: 1.2–1.3%; Water absorption at saturation: about 3%; Wet stiffness retention: about 70–75%.
Where is PA612 Nylon used in cleaning brushes?
Long-life wet cleaning, precision tube brushing and premium roller or strip brushes where stable trim geometry matters.
How does filament geometry change PA612 Nylon brush stiffness?
PA612 Nylon 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.
When should PA612 Nylon be replaced by another material?
Compare PA612 Nylon with PA66, PP, PBT. Change material when wet stiffness, temperature, chemical resistance, conductivity, particle shedding, or surface marking becomes the limiting factor.
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