Conclusion: PA6 offers better soft elasticity, while PA66 excels in fatigue-resistant rebound.

• PA6 Filament

Features flexible molecular chains, high toughness and softness, with gentle bending recovery.

Ideal for household brushes, cosmetic brushes and other light‑to‑medium duty applications requiring a mild touch.

Cost-effective, but rigidity decreases significantly at high temperatures and may fatigue under long‑term heavy load.

PA66 Filament

High crystallinity and tight molecular structure provide outstanding rigidity, strength and wear resistance.

Heat-resistant up to approximately 150°C, with crisp, powerful rebound.

Suitable for industrial brushes, road sweeping brushes, precision instrument brushes and other heavy‑duty, high‑temperature, high‑abrasion environments, with minimal deformation or flattening over time.

Selection Guide:

Choose PA6 for soft elasticity and cost performance.

Choose PA66 for high durability and consistent, strong rebound.