Chemical Structure Differences
The fundamental difference between PA6 (Nylon 6) und PA66 (Nylon 66) lies in their molecular structure:
- Nylon 6: Made from caprolactam, has 6 carbon atoms in each repeating unit. Less crystalline structure.
- Nylon 66: Made from hexamethylenediamine and adipic acid, has two 6-carbon chains. More crystalline structure.
Mechanical Properties Comparison
| Eigentum | PA6 | PA66 |
|---|---|---|
| Zugfestigkeit | 70-85 MPa | 80-100 MPa |
| Biegemodus | 2.5-3.0 GPa | 2.8-3.5 GPa |
| Dehnung beim Bruch | 30-100% | 15-60% |
| Notched Izod Impact | 50-100 J/m | 40-80 J/m |
| Schmelzpunkt | 220°C | 260°C |
| HDT at 1.8 MPa | 70°C | 90°C |
Feuchtigkeitsabsorption
Moisture absorption is critical for nylon applications:
| Condition | PA6 | PA66 |
|---|---|---|
| At 50% RH | 2.5-3.0% | 2.0-2.5% |
| Saturation | 8-10% | 6-8% |
Processing Characteristics
Nylon 6 Processing
- Melting Point: 220°C
- Processing Range: 240-280°C
- Temperatur der Form: 40-80°C
Nylon 66 Processing
- Melting Point: 260°C
- Processing Range: 280-320°C
- Temperatur der Form: 60-90°C
Applications by Material
Nylon 6 Applications
- Gears and sprockets
- Industrial monofilament
- Film and packaging
- Consumer products
Nylon 66 Applications
- Automotive under-hood components
- Electrical connectors
- High-temperature bearings
- Precision mechanical components
Reinforced Grades
Both materials are commonly reinforced with glass fiber:
| Klasse | PA6 + GF30 | PA66 + GF30 |
|---|---|---|
| Zugfestigkeit | 140-160 MPa | 170-200 MPa |
| HDT (1.8 MPa) | 205°C+ | 250°C+ |
| Feuchtigkeitsabsorption | 1.0-1.5% | 0.8-1.2% |
Selection Summary
Choose Nylon 6 when:
- Impact resistance is critical
- Cost sensitivity is high
- Operating temperatures are moderate
Choose Nylon 66 when:
- Higher mechanical strength is required
- Elevated temperatures are expected
- Dimensional stability is critical
FAQ
When is Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide a good option?
Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide is a good option when fast iteration, complex geometry, low tooling cost, or low-volume production is more important than molded-part unit cost.
What should be checked before choosing Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide?
Prüfen Sie die Größe des Teils, die Materialeigenschaften, die Oberflächenbeschaffenheit, die Maßtoleranz, die Wärmeeinwirkung, die Belastungsrichtung und ob eine Nachbearbeitung erforderlich ist.
How does Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide compare with CNC machining?
Mit dem 3D-Druck lassen sich komplexe Formen schnell erstellen, während die CNC-Bearbeitung für präzise Oberflächen, engere Toleranzen und serienreife Materialien oft besser geeignet ist.
What affects the cost of Nylon 6 vs Nylon 66 — Engineering Plastic Selection Guide?
Die Kosten hängen vom Material, dem Bauvolumen, der Druckzeit, der Schichthöhe, der Entfernung von Stützen, der Endbearbeitung, der Prüfung und der Anzahl der Teile im Bau ab.
English 
Dutch 
German 
French 
Korean 
Russian 
Japanese 
Spanish 
Vietnamese 
Chinese 
Portuguese 
Arabic