Polyamide (PA 6.6)
Polyamide with 50% glass fibres (PA 6.6 GF 50)
Like polyamide 6, polyamide 6.6 (PA 6.6) is a semi-crystalline thermoplastic. However, its mechanical properties are somewhat better than those of PA6.
Due to the lower water absorption, this material exhibits lower form changes than PA 6 during "conditioning" (water absorption due to humidity).
| Short designation | PA 6.6 | PA 6.6 GF 50 |
| Description | Polyamide (polycondensate) | Polyamide with 50% glass fibre |
| Mechanical properties | ||
| Test specimen condition | Dry/damp | Dry/damp |
| Tensile strength [MPa] | No info | 230/180 |
| Elastic modulus (tensile) [MPa] | 3100/1100 | 16000/12500 |
| Ball indentation hardness [MPa] | 160/100 | 300/260 |
| Physical properties | ||
| Density [g/cm³] | 1.14 | 1.55 |
| Melting point [°C] | 260 | 260 |
| Application temperatures | ||
| Max. temp., short-term [°C] | 200 | 240 |
| Max. temp., continuous [°C] | 100 | 130 |
| Min. application temp. [°C] | -40 | -40 |
| Other properties | ||
| Flammability according to UL 94 | V-2 | HB |
| Water absorption (normal climate) [%] | 2.8 | 1.2 |
| Chemical resistance | ||
| Mineral grease and oils | + | + |
| Petrol | + | + |
| Weak/strong acids | o/- | o/- |
| Weak/strong alkalis | +/o | o/- |
| Perchloroethylene | + | + |
| Trichloroethylene | + | + |
| Acetone | + | + |
| Alcohols | + | + |
| Hydrolysis resistance (hot water) | o | o |
| Weather/UV radiation | o | o |
+ resistant / o conditionally resistant / - not resistant
This information is for reference only; we do not assume any liability for its accuracy. The properties of thermoplastics are highly dependent on their specific composition and their additives.