Overview
PA12 (Polyamide 12, Nylon 12) is a high-performance engineering thermoplastic known for its exceptional chemical resistance, low moisture absorption, dimensional stability, flexibility, impact resistance, and lightweight properties.
Compared with PA6 and PA66, PA12 absorbs significantly less moisture, providing superior dimensional stability and long-term performance in humid environments. It also offers excellent flexibility, fatigue resistance, and resistance to fuels, oils, and chemicals.
PA12 is widely used in:
- Automotive Fuel Systems
- Pneumatic Tubing
- Medical Devices
- Electrical Cable Protection
- Aerospace Components
- Industrial Fluid Handling Systems
- Consumer Electronics
- Additive Manufacturing (3D Printing)
Due to its combination of flexibility, chemical resistance, and environmental stability, PA12 is one of the most versatile engineering plastics available.
Material Specification
| Property | Value |
|---|---|
| Material Designation | PA12 |
| Full Name | Polyamide 12 |
| Common Name | Nylon 12 |
| Material Family | Engineering Thermoplastic |
| Density | 1.01–1.03 g/cm³ |
| Appearance | Natural, Black, Colored |
| Typical Manufacturing Methods | Injection Molding, Extrusion, CNC Machining, 3D Printing |
| Standard Forms | Rod, Sheet, Tube, Pellets, Powder |
Chemical Composition
PA12 is produced through polymerization of laurolactam.
| Component | Function |
|---|---|
| Polyamide 12 Polymer | Structural Matrix |
| Stabilizers | Thermal Stability |
| UV Additives (Optional) | Weather Resistance |
| Lubricants (Optional) | Wear Resistance |
| Reinforcements (Optional) | Strength Enhancement |
Mechanical Properties
Typical Values
| Property | Value |
|---|---|
| Tensile Strength | 45–60 MPa |
| Yield Strength | 40–55 MPa |
| Elongation at Break | 150–300% |
| Flexural Strength | 55–80 MPa |
| Flexural Modulus | 1.0–1.7 GPa |
| Hardness | Shore D 70–80 |
| Izod Impact Strength | Excellent (Often No Break) |
Typical Mechanical Performance
| Property | Performance |
|---|---|
| Toughness | Outstanding |
| Flexibility | Outstanding |
| Impact Resistance | Outstanding |
| Fatigue Resistance | Excellent |
PA12 combines excellent toughness with long-term flexibility.
Physical Properties
| Property | Value |
|---|---|
| Density | 1.01–1.03 g/cm³ |
| Water Absorption (24h) | 0.2–0.4% |
| Saturated Water Absorption | 1.0–1.5% |
| Thermal Conductivity | 0.20–0.25 W/m·K |
| Electrical Resistivity | >10¹³ Ω·cm |
| Specific Heat Capacity | 1700 J/kg·K |
PA12 exhibits the lowest moisture absorption among common engineering nylon grades.
Thermal Properties
| Property | Value |
|---|---|
| Melting Point | 175–180°C |
| Glass Transition Temperature | 40–45°C |
| Heat Deflection Temperature | 45–75°C |
| Continuous Service Temperature | -50°C to 100°C |
| Short-Term Service Temperature | Up to 120°C |
PA12 maintains flexibility and toughness across a broad temperature range.
Strength-to-Weight Ratio
| Material | Density (g/cm³) | Tensile Strength |
|---|---|---|
| PA12 | 1.02 | 55 MPa |
| PA11 | 1.04 | 50 MPa |
| PA6 | 1.14 | 80 MPa |
| PA66 | 1.14 | 90 MPa |
PA12 offers lightweight performance with excellent environmental stability.
Chemical Resistance
| Chemical Environment | Performance |
|---|---|
| Oils & Greases | Excellent |
| Fuels | Excellent |
| Diesel | Excellent |
| Hydraulic Fluids | Excellent |
| Alcohols | Excellent |
| Salt Water | Excellent |
| Weak Acids | Good |
| Strong Acids | Fair |
PA12 is widely used in fluid transport systems due to its outstanding chemical resistance.
Moisture Resistance
| Property | Performance |
|---|---|
| Water Absorption | Outstanding |
| Dimensional Stability | Outstanding |
| Humidity Resistance | Excellent |
| Environmental Stability | Excellent |
PA12 absorbs significantly less moisture than PA6 and PA66, resulting in more stable dimensions.
Low Temperature Performance
| Property | Performance |
|---|---|
| Impact Strength at -50°C | Outstanding |
| Flexibility at Low Temperature | Excellent |
| Crack Resistance | Excellent |
| Cold Weather Durability | Excellent |
PA12 is particularly suitable for outdoor, aerospace, and automotive applications.
Wear Resistance
| Property | Performance |
|---|---|
| Abrasion Resistance | Good |
| Sliding Wear Resistance | Good |
| Surface Durability | Good |
| Fatigue Resistance | Excellent |
While not as wear-resistant as PA66, PA12 offers superior flexibility and environmental stability.
Electrical Properties
| Property | Value |
|---|---|
| Volume Resistivity | >10¹³ Ω·cm |
| Surface Resistivity | >10¹² Ω |
| Dielectric Strength | 20–30 kV/mm |
| Dielectric Constant | 3.0–3.4 |
PA12 is widely used in electrical insulation and cable protection applications.
Machinability
| Process | Rating |
|---|---|
| CNC Milling | Excellent |
| CNC Turning | Excellent |
| Drilling | Excellent |
| Tapping | Excellent |
| Routing | Excellent |
Machinability Comparison
| Material | Machinability |
|---|---|
| PA12 | Excellent |
| PA11 | Excellent |
| PA6 | Excellent |
| POM | Excellent |
PA12 machines cleanly and maintains dimensional accuracy.
Injection Molding Characteristics
| Property | Rating |
|---|---|
| Moldability | Excellent |
| Flow Characteristics | Excellent |
| Surface Finish | Excellent |
| Production Efficiency | Excellent |
| Shrinkage Control | Good |
PA12 is suitable for high-precision molded components.
3D Printing Characteristics
| Property | Rating |
|---|---|
| SLS Printability | Outstanding |
| MJF Printability | Outstanding |
| Layer Adhesion | Excellent |
| Dimensional Stability | Excellent |
| Surface Finish | Good |
PA12 is the most widely used material in industrial powder-bed fusion 3D printing technologies.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ISO | PA12 |
| ASTM | Nylon 12 |
| DIN | PA12 |
| JIS | Nylon 12 |
| GB/T (China) | PA12 / 尼龙12 |
| UL | Polyamide 12 |
Available Forms
| Product Type | Availability |
|---|---|
| Rod | Yes |
| Sheet | Yes |
| Tube | Yes |
| Pellets | Yes |
| SLS Powder | Yes |
| Injection Molded Parts | Yes |
Typical Applications
Automotive Industry
- Fuel Lines
- Brake Tubing
- Air Brake Systems
- Fluid Connectors
Aerospace Industry
- Lightweight Ducting
- Fluid Transfer Systems
- Interior Components
Medical Industry
- Catheters
- Medical Tubing
- Device Components
- Wearable Devices
Electrical Industry
- Cable Jackets
- Wire Protection
- Connectors
- Insulation Components
Industrial Applications
- Pneumatic Tubing
- Chemical Transfer Lines
- Flexible Connectors
Additive Manufacturing
- Functional Prototypes
- End-Use Parts
- Lightweight Structures
- Complex Geometries
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| Injection Molding | Outstanding |
| CNC Machining | Excellent |
| Extrusion | Excellent |
| Blow Molding | Excellent |
| SLS/MJF 3D Printing | Outstanding |
Advantages
Extremely Low Moisture Absorption
Provides excellent dimensional stability.
Outstanding Chemical Resistance
Resists fuels, oils, greases, and hydraulic fluids.
Excellent Flexibility
Maintains toughness over a broad temperature range.
Lightweight
One of the lightest engineering nylons available.
Excellent Fatigue Resistance
Suitable for repeated flexing applications.
Outstanding 3D Printing Material
Industry standard for SLS and MJF production parts.
Limitations
Lower Strength Than PA66
Not intended for highly loaded structural applications.
Lower Heat Resistance
Compared with PA66 and glass-filled nylons.
Higher Material Cost
More expensive than PA6 and PA66.
Softer Material
Lower stiffness than traditional engineering nylon grades.
Comparison with Common Nylon Grades
| Property | PA12 | PA11 | PA6 | PA66 |
|---|---|---|---|---|
| Moisture Absorption | Outstanding | Excellent | Moderate | Moderate |
| Flexibility | Outstanding | Excellent | Moderate | Moderate |
| Chemical Resistance | Excellent | Excellent | Good | Good |
| Strength | Moderate | Moderate | High | Highest |
| Heat Resistance | Good | Good | Better | Best |
Comparison with PA11
| Property | PA12 | PA11 |
|---|---|---|
| Moisture Absorption | Lower | Low |
| Dimensional Stability | Better | Excellent |
| Bio-Based Content | No | Yes |
| Chemical Resistance | Excellent | Excellent |
| Cost | Moderate | Higher |
Available Surface Finishes
Standard Finishes
- Natural Finish
- Black Finish
- Molded Finish
Functional Finishes
- CNC Machined Finish
- Smooth Extruded Finish
- Polished Finish
Specialty Finishes
- Conductive Grade Finish
- Glass Filled Grade Finish
- Flame Retardant Grade Finish
- UV Stabilized Grade Finish
Frequently Asked Questions (FAQ)
What is PA12?
PA12 (Nylon 12) is a high-performance engineering plastic known for low moisture absorption, excellent chemical resistance, and outstanding flexibility.
What is PA12 used for?
Typical applications include:
- Fuel Lines
- Pneumatic Tubing
- Medical Devices
- Aerospace Components
- Industrial Fluid Systems
Is PA12 stronger than PA6?
No. PA6 is stronger, while PA12 offers superior flexibility, dimensional stability, and chemical resistance.
Why is PA12 popular in 3D printing?
Because it provides excellent dimensional stability, toughness, chemical resistance, and long-term durability.
What is the biggest advantage of PA12?
Its exceptionally low moisture absorption and outstanding environmental stability.
Is PA12 suitable for fuel systems?
Yes. PA12 is widely used in automotive and industrial fuel transport applications.
Why choose PA12?
Because it combines:
- Low Moisture Absorption
- Excellent Chemical Resistance
- Outstanding Flexibility
- High Impact Resistance
- Excellent 3D Printing Performance
Does GCNOV provide PA12 manufacturing services?
Yes. GCNOV provides:
- PA12 CNC Machining
- PA12 Injection Molding
- PA12 Extrusion
- SLS & MJF 3D Printing
- Prototype Development
- Low-Volume Production
- Mass Production
- Custom Engineering Components