Overview
Nylon (PA, Polyamide) is one of the most widely used engineering thermoplastics, valued for its excellent combination of strength, wear resistance, toughness, fatigue resistance, low friction, and chemical resistance.
Originally developed as a metal replacement material, Nylon offers outstanding mechanical properties while maintaining a lightweight profile. It is widely used in machined components, injection molded parts, gears, bearings, bushings, and structural applications across numerous industries.
Common nylon grades include:
- PA6 (Nylon 6)
- PA66 (Nylon 66)
- PA11
- PA12
- Glass Filled Nylon
- Oil Filled Nylon
- MoS₂ Filled Nylon
Nylon is widely used in:
- Gears and Bearings
- Bushings and Rollers
- Automotive Components
- Industrial Machinery Parts
- Electrical Insulators
- Consumer Products
- Medical Equipment
- Mechanical Wear Components
Due to its excellent wear resistance and self-lubricating properties, Nylon remains one of the most popular engineering plastics worldwide.
Material Specification
| Property | Value |
|---|---|
| Material Designation | Nylon (PA) |
| Full Name | Polyamide |
| Material Family | Engineering Thermoplastic |
| Common Grades | PA6, PA66, PA11, PA12 |
| Density | 1.12–1.15 g/cm³ |
| Appearance | Natural, Black, Colored |
| Typical Manufacturing Methods | Injection Molding, CNC Machining, Extrusion |
| Standard Forms | Rod, Sheet, Tube, Pellets |
Chemical Composition
Polyamide materials are formed through polymerization of amide groups.
| Component | Function |
|---|---|
| Polyamide Polymer | Structural Matrix |
| Stabilizers | Thermal Stability |
| Lubricants (Optional) | Wear Reduction |
| Glass Fibers (Optional) | Reinforcement |
Various additives can significantly modify performance characteristics.
Mechanical Properties
PA6 / PA66 Typical Values
| Property | Value |
|---|---|
| Tensile Strength | 70–90 MPa |
| Yield Strength | 65–85 MPa |
| Elongation at Break | 20–80% |
| Flexural Strength | 90–130 MPa |
| Flexural Modulus | 2.5–3.5 GPa |
| Hardness | Rockwell R110–120 |
| Izod Impact Strength | 50–150 J/m |
Typical Mechanical Performance
| Property | Performance |
|---|---|
| Wear Resistance | Excellent |
| Fatigue Resistance | Excellent |
| Toughness | Excellent |
| Load Bearing Capability | Excellent |
Physical Properties
| Property | Value |
|---|---|
| Density | 1.12–1.15 g/cm³ |
| Water Absorption | 1–8% |
| Thermal Conductivity | 0.25–0.30 W/m·K |
| Electrical Resistivity | >10¹² Ω·cm |
| Specific Heat Capacity | 1700 J/kg·K |
Thermal Properties
| Property | Value |
|---|---|
| Melting Point (PA6) | 220°C |
| Melting Point (PA66) | 255–265°C |
| Heat Deflection Temperature | 70–100°C |
| Continuous Service Temperature | -40°C to 105°C |
| Short-Term Service Temperature | Up to 160°C |
Glass-filled grades can significantly improve heat resistance.
Strength-to-Weight Ratio
| Material | Density (g/cm³) | Tensile Strength |
|---|---|---|
| Nylon PA66 | 1.14 | 85 MPa |
| ABS | 1.05 | 45 MPa |
| Polycarbonate | 1.20 | 70 MPa |
| Aluminum 6061 | 2.70 | 310 MPa |
Nylon offers an excellent strength-to-weight ratio for engineering applications.
Wear Resistance
| Property | Performance |
|---|---|
| Abrasion Resistance | Excellent |
| Sliding Wear Resistance | Excellent |
| Surface Durability | Excellent |
| Bearing Performance | Excellent |
Nylon is widely used for moving mechanical parts due to its self-lubricating characteristics.
Friction Properties
| Property | Value |
|---|---|
| Coefficient of Friction | 0.20–0.40 |
| Self-Lubricating | Yes |
| Dry Running Capability | Good |
| Noise Reduction | Excellent |
These characteristics make Nylon ideal for gears, rollers, and bushings.
Chemical Resistance
| Chemical Environment | Performance |
|---|---|
| Oils & Greases | Excellent |
| Fuels | Good |
| Hydrocarbons | Good |
| Alkalis | Good |
| Alcohols | Good |
| Strong Acids | Poor |
| Oxidizing Agents | Poor |
Nylon performs well in most industrial lubrication environments.
Moisture Absorption
| Property | Performance |
|---|---|
| Moisture Absorption | Moderate to High |
| Dimensional Stability | Moderate |
| Strength Retention | Good |
| Environmental Sensitivity | Moderate |
Moisture absorption is one of the primary design considerations when using Nylon.
Electrical Properties
| Property | Value |
|---|---|
| Volume Resistivity | >10¹² Ω·cm |
| Surface Resistivity | >10¹¹ Ω |
| Dielectric Strength | 15–25 kV/mm |
| Dielectric Constant | 3.5–4.0 |
Nylon is commonly used as an electrical insulation material.
Machinability
| Process | Rating |
|---|---|
| CNC Milling | Excellent |
| CNC Turning | Excellent |
| Drilling | Excellent |
| Tapping | Excellent |
| Routing | Excellent |
Machinability Comparison
| Material | Machinability |
|---|---|
| Nylon | Excellent |
| POM (Acetal) | Excellent |
| ABS | Excellent |
| Polycarbonate | Good |
Nylon machines easily and produces strong, precise components.
Injection Molding Characteristics
| Property | Rating |
|---|---|
| Moldability | Excellent |
| Flow Characteristics | Good |
| Surface Finish Quality | Good |
| Production Efficiency | Excellent |
| Cycle Time | Fast |
Nylon is one of the most commonly injection molded engineering plastics.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ISO | Polyamide (PA) |
| ASTM | Nylon Resin |
| DIN | PA |
| JIS | Polyamide |
| GB/T (China) | 尼龙（PA） |
| UL | Nylon Thermoplastic |
Available Forms
| Product Type | Availability |
|---|---|
| Rod | Yes |
| Sheet | Yes |
| Tube | Yes |
| Pellets | Yes |
| Injection Molded Parts | Yes |
| Machined Components | Yes |
Typical Applications
Industrial Machinery
- Gears
- Bearings
- Bushings
- Rollers
- Wear Pads
Automotive Industry
- Engine Components
- Fuel System Parts
- Cable Guides
- Structural Clips
Electrical Industry
- Connectors
- Insulators
- Switch Components
- Electrical Housings
Consumer Products
- Sporting Goods
- Appliance Components
- Mechanical Assemblies
Medical Industry
- Equipment Components
- Instrument Handles
- Structural Parts
Packaging Industry
- Conveyor Components
- Guide Rails
- Wear Strips
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| Injection Molding | Outstanding |
| CNC Machining | Excellent |
| Extrusion | Excellent |
| Secondary Assembly | Excellent |
Advantages
Excellent Wear Resistance
Ideal for moving and sliding components.
High Strength
One of the strongest standard engineering plastics.
Low Friction
Suitable for self-lubricating applications.
Good Chemical Resistance
Performs well in industrial environments.
Lightweight
Much lighter than metals.
Cost Effective
Excellent performance-to-cost ratio.
Limitations
Moisture Absorption
Can affect dimensions and mechanical properties.
Moderate UV Resistance
Outdoor applications may require UV stabilization.
Lower Dimensional Stability Than POM
Humidity can influence tolerances.
Acid Sensitivity
Strong acids can degrade Nylon.
Comparison with Common Engineering Plastics
| Property | Nylon | POM | PC | ABS |
|---|---|---|---|---|
| Wear Resistance | Excellent | Excellent | Good | Moderate |
| Strength | Excellent | Good | Good | Moderate |
| Moisture Resistance | Moderate | Excellent | Good | Good |
| Machinability | Excellent | Excellent | Good | Excellent |
| Cost | Moderate | Moderate | Higher | Lower |
Comparison with Metal Components
| Material | Density | Tensile Strength |
|---|---|---|
| Nylon PA66 | 1.14 g/cm³ | 85 MPa |
| Aluminum 6061 | 2.70 g/cm³ | 310 MPa |
| Brass C360 | 8.50 g/cm³ | 345 MPa |
| Steel 1018 | 7.87 g/cm³ | 440 MPa |
Nylon can replace metal in many low-to-medium load applications while significantly reducing weight.
Available Surface Finishes
Standard Finishes
- Natural Finish
- Black Finish
- Molded Finish
Functional Finishes
- CNC Machined Finish
- Polished Finish
- Precision Ground Finish
Specialty Finishes
- Oil-Filled Nylon Finish
- MoS₂ Filled Nylon Finish
- Glass-Filled Nylon Finish
Frequently Asked Questions (FAQ)
What is Nylon (PA)?
Nylon is an engineering thermoplastic known for excellent strength, wear resistance, and low friction.
What is Nylon used for?
Typical applications include:
- Gears
- Bearings
- Bushings
- Rollers
- Industrial Components
Is Nylon stronger than ABS?
Yes. Nylon offers significantly higher strength, wear resistance, and load-bearing capability.
Is Nylon self-lubricating?
Yes. Nylon naturally exhibits low friction and good wear resistance.
Can Nylon be machined?
Yes. Nylon offers excellent CNC machining performance.
Why choose Nylon?
Because it combines:
- High Strength
- Excellent Wear Resistance
- Low Friction
- Lightweight Construction
- Cost-Effective Performance
What is the biggest disadvantage of Nylon?
Moisture absorption, which can affect dimensional stability and mechanical properties.
Does GCNOV provide Nylon manufacturing services?
Yes. GCNOV provides:
- Nylon CNC Machining
- Nylon Injection Molding
- Custom Plastic Fabrication
- Prototype Development
- Surface Finishing
- Low-Volume Production
- Mass Production
- Wear Component Manufacturing