General Information
Drying before processing is highly recommended : moisture content should be a maximum of 0.2%. The maximum permissible drying
temperatures lie in the range of about 80 to 110 °C.
PA 6,6 is thermally stable up to 310 °C, but above decomposition accelerates, the initial products formed being mainly carbon monoxide and ammonia, and caprolactam.
Injection Moulding
A L/D ratio of 18-22 is recommended.
Melt temperature : 270-300°C
Mold temperature : 55-80°C
Extrusion
Only highly viscous grades can be processed by extrusion.
A three-sections screw with a L/D ratio of 20-30 is recommended.
The processing temperature should lie between 270 to 290°C.
| Strengths | Limitations |
| High strength and stiffness at high temperature | High water absorption and water equilibrium content |
| Good impact strength, even at low temperature (better than PA 6) | Low dimensional stability |
| Very good flow for easy processing | Attacked by strong mineral acids and absorbs polar solvents |
| Good abrasion and wear resistance | Proper drying before processing is needed |
| Excellent fuel and oil resistance | |
| Good fatigue resistance | |
| Good electrical insulating properties |
| Property | Value |
| Dimensionable stability | |
| Coefficient of linear thermal expansion | 5 - 14 10^-5 °C-1 |
| H2O absorption 24 hours | 1 - 3 % |
| Shrinkage | 0.7 - 3 % |
| Eletrical Performances | |
| Arc resistance | 130 - 140 sec |
| Dielectric constant | 4 - 5 |
| Dielectric rigidity | 20 - 30 kv/mm |
| Dissipation factor | 100 - 400 10^-4 |
| Volume resistivity | 14 10^X Ohm.cm |
| Fire performances | |
| Fire resistance (LOI) | 21 - 27 % |
| Flammability UL94 | HB |
| Mechanical properties | |
| Elongation at break | 150 - 300 % |
| Elongation at yield | 3.4 - 30 % |
| Flexibility (Flexural Modulus) | 0.8 - 3 GPa |
| Hardness Rockwell M | 30 - 80 |
| Hardness Shore D | 80 - 95 |
| Stiffness (Flexural Modulus) | 0.8 - 3 GPa |
| Strength at break (tensile) | 50 - 95 MPa |
| Strength at yield (tensile) | 45 - 85 MPa |
| Toughness (Notched Izod impact at room temperature) | 50 - 150 J/m |
| Toughness at low T (Notched Izod impact at low temperature) | 27 - 35 J/m |
| Young modulus | 1 - 3.5 GPa |
| Optical properties | |
| Gloss | 65 - 150 % |
| Physical properties | |
| Density | 1.13 - 1.15 g/cm^3 |
| Glass transition temperature | 55 - 58 °C |
| Radiation resistance | |
| Gamma radiation resistance | Fair |
| Applications | Performances |
| Automotive Transportation |
|
| Door handles |
Excellent surface appearance
Good paint ability Good UV resistance Good mechanical properties, like stiffness and toughness |
| Radiator grilles |
High heat resistance
Good weathering resistance Good chemical resistance |
| Airbag containers |
Outperforming toughness and fatigue resistance
Good wear, abrasion and friction behaviour Good retention of stiffness and long term heat stability Good resistance to oil and various chemicals |
| Air-intake manifolds |
High stiffness
Excellent flow characteristics Short injection cycle times |
| Relay boxes |
Good mechanical properties
Excellent weld line strength at elevated temperatures Practical dimensional accuracy |
| Engine covers |
Combination of high toughness and stiffness
Low warpage Good surface finish Easy and speedy processability |
| Electrical markets | |
| Low voltage switchgear |
Good electrical insulating properties
Good processablity, allow thin walls Laser marking ability Low flammability, using halogen free flame retardants |
| Circuit breakers |
Practical ball pressure temperature
Low flammability High stiffness combines with high toughness |
| Contactors |
Good insulating properties
Low flammability High heat distorsion temperature |
| Connectors |
Short injection cycle time
Excellent flow characteristics High stiffness combines with high toughness |
| Tubes for wirings and cables protection |
High temperature resistance
Good chemical resistance Weight loss compared to metal tubes |
| Fibers Textiles Carpets | |
| Carpets and rugs |
Superior appearance retention due to a high resilience
Excellent resistance to wear, crushing and matting Excellent dirt resistance and easy to clean |
| Bristles Brushes Brooms |
High strength
Easy to clean Good chemical resistance |
| Furniture | |
| Stadium seats |
Brilliant surface quality
Good resistance to ageing (especially outside) Excellent dirt resistance Excellent alternative to polypropylene |
| Sports & Leisures | |
| Ski bindings |
Excellent fatigue properties
High impact and mechanical strength |
| Household products Consumer Goods |
|
| Power tool housings |
High heat resistant
High impact strength Good processability |
| Packaging | |
| Films for food packaging (mono or multi layer) |
Very high puncture resistance
Good barrier resistance to oxygen, carbon dioxide and aromas Good transparency |
