PA9T (Polyamide 9T)
Polyamide 9T — semi-aromatic PA based on 1,9-nonanediamine and terephthalic acid. Lowest moisture absorption of any semi-crystalline polyamide (<0.3% at 50% RH). Tm 300-310°C, excellent dimensional stability. Kuraray exclusive: Genestar. Superior to PA6T in processability (lower Tm) while maintaining high-temp performance. Used for SMT connectors (reflow-compatible), automotive ECU housings, LED reflectors, and precision mechanical parts requiring minimal moisture-induced dimensional change.
Chemical composition comparison (wt%)
Side-by-side: PA9T (Polyamide 9T) (COMPOSITION) (ISO 16396) vs ASTM
| Element | PA9T (Polyamide 9T) (COMPOSITION) | ASTM | Overlap |
|---|---|---|---|
| Base Polymer (Polyamide 9T) | 99–99.9% | — | — |
Mechanical properties
Unfilled Dry
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 75–90 | MPa |
| Elongation | 15–40 | % |
| Elastic Modulus | 2200–2600 | MPa |
| Density | 1.12–1.14 | g/cm3 |
| Melting Point | 300–310 | °C |
| water_absorption_50rh | 0.2–0.3 | % |
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