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Ultra-low water absorption (0.6%–0.7%)
Far lower than PA66 (~2.8%). Hardness, modulus and grinding force remain stable under dry/wet conditions; no softening, particle shedding or deformation; outstanding dimensional stability.
Superior elastic recovery
High toughness and fatigue resistance. Resists permanent deformation and breakage under high-speed rotating and reciprocating operation, perfect for heavy-duty brush rollers and disc brushes.
Thermal stability & temperature resistance
Melting point approx. 220 °C, continuous service temperature -40 ℃ ~ 105 ℃. Resists softening and sticking under grinding heat, preventing abrasive detachment. Outperforms PA6 and PA66.
Wear & aging resistance
Long carbon chain structure delivers excellent abrasion resistance; industrial service life is 2–3 times longer than PA66. Good UV, acid, alkali and salt spray resistance for harsh working environments.
Abrasive compatibility & processability
High melt strength, excellent compatibility and dispersion with silicon carbide, alumina and diamond abrasives. Stable extrusion and drawing; abrasive loading capacity reaches 15%–30% (5%–15% for diamond).
2. Typical Formulation & Specifications
Basic Formula (by weight)
PA612 base resin (MFR 1.0–2.0 g/10min): 70–85
Abrasive grains (SiC / white alumina / diamond): 15–30
Auxiliaries:
Silane / titanate coupling agent: 0.5–1.5
Antioxidant + UV stabilizer: 0.3–0.8
Lubricant (EBS / stearate): 0.2–0.5
Common Specifications
Filament diameter: 0.3–2.5 mm
Main sizes: 0.5 / 0.8 / 1.0 / 1.5 / 2.0 mm
Shape: straight filament / crimped filament
Abrasive content: 15% (fine polishing), 20%–25% (general), 30% (rough grinding / heavy deburring)
3. Typical Key Properties
Density: 1.04–1.08 g/cm³ (with 20% abrasive)
Tensile strength: 55–70 MPa
Elongation at break: 150%–250%
Bending recovery rate: ≥30%
24h water absorption (23 ℃): ≤0.8%
Long-term service temperature: -40 ℃ ~ 105 ℃
Taber abrasion loss: ≤5 mg / 1000 cycles
4. Application Scenarios
Metal processing: Automotive hubs, gears, engine deburring, precision component polishing, stainless steel brushing
Glass & optics: Display glass, lens and sapphire fine polishing
Stone & wood: Marble / granite grinding, wood grain wire drawing
Electronics & PCB: Circuit board deburring, copper foil polishing, ceramic substrate fine grinding
Textile industry: Sanding roller abrasive filaments for fabric surface sanding.
| Property | PA612 | PA610 | PA66 | PA6 |
| Water Absorption | Ultra-low | Low | High | Very high |
| Elastic Recovery | Excellent | Very Good | Good | Fair |
| Temperature Resistance | -40～105℃ | -30～95℃ | -20～80℃ | -20～70℃ |
| Wear Resistance & Service Life | Longest | Long | Medium | Short |
| Abrasive Adhesion | Excellent | Good | Fair | Poor |
| Cost | High | Medium-High | Medium | Low |
6. Modification Optimization Directions
Nucleation modification: Add 0.2%–0.5% organic nucleating agent to refine spherulites, improve rigidity, heat resistance and shorten production cycle.
Toughening modification: Blend 5%–10% POE/EVA elastomer to enhance low-temperature toughness and reduce filament breakage.
Wear enhancement: Add nano SiO₂, graphite or PTFE to lower friction coefficient and improve wear resistance.
Flame retardant / Anti-static: Add flame retardant to reach UL94 V-0 or conductive carbon black for electronic and explosion-proof applications.
Drying: 80 ℃ vacuum drying for 4–6 hours
Extrusion temperature: 230–250 ℃
Drawing ratio: 2.5–4.0 times for higher strength and elasticity
Annealing: 80–100 ℃ for 1–2 hours to release internal stress and stabilize dimension.
Note: The company will provide some sub brand PA612 for you to choose from every month. If you have any needs, please contact us.
