Polyamide 66

material

A semi-crystalline engineering thermoplastic made from hexamethylenediamine and adipic acid, known for excellent mechanical properties, chemical resistance, and high temperature performance.

In Simple Terms

PA66, commonly called Nylon 66, is a tough engineering plastic that maintains strength at high temperatures. It's created by combining two 6-carbon molecules, giving it superior mechanical properties compared to PA6. Widely used in automotive and industrial applications.

Why It Matters

PA66 commands premium pricing in resin markets due to its exceptional balance of strength, heat resistance, and processability. Understanding its specifications is crucial for traders as it serves critical automotive, electronics, and industrial markets with strict performance requirements.

Technical Details

PA66 exhibits higher melting point (265°C vs 220°C for PA6), superior dimensional stability, and better creep resistance. Its symmetrical molecular structure creates higher crystallinity (40-50%), resulting in enhanced mechanical properties. Processing requires precise moisture control (<0.2%) and higher melt temperatures (270-290°C) compared to commodity plastics.

Real-World Examples

Automotive connector trading

A resin trader sources glass-filled PA66 grades with specific UL ratings for under-hood automotive connectors, verifying heat deflection temperature and flame retardancy in the certificate of analysis.

Industrial gear application

Processing facility selects impact-modified PA66 for injection molding gear components, monitoring melt flow rate and molecular weight to ensure proper cavity filling and mechanical performance.

Quality control verification

Lab technician uses DSC analysis to confirm PA66 melting point at 265°C and measures intrinsic viscosity to verify molecular weight consistency across different production lots.