Overview
Virgin PEEK (Unfilled Polyether Ether Ketone) is the pure, unreinforced form of PEEK, offering an exceptional combination of high mechanical strength, outstanding chemical resistance, superior thermal stability, excellent wear resistance, and biocompatibility.
Unlike glass-filled or carbon-filled grades, Virgin PEEK provides the highest purity, best toughness, superior ductility, and excellent electrical insulation properties. It is widely used in medical, aerospace, semiconductor, food processing, and precision engineering applications where contamination control and material purity are critical.
Virgin PEEK is widely used in:
- Medical Implants
- Semiconductor Equipment
- Aerospace Components
- Food Processing Machinery
- Electrical Insulators
- Precision Machined Parts
- Analytical Instruments
- High-Purity Industrial Components
Due to its outstanding performance across extreme environments, Virgin PEEK is considered one of the most advanced engineering thermoplastics available.
Material Specification
| Property | Value |
|---|---|
| Material Designation | Virgin PEEK |
| Full Name | Unfilled Polyether Ether Ketone |
| Common Name | Virgin PEEK |
| Material Family | High-Performance Thermoplastic |
| Density | 1.30–1.32 g/cm³ |
| Appearance | Natural Beige |
| Fillers | None |
| Typical Manufacturing Methods | CNC Machining, Injection Molding, Compression Molding, Extrusion |
| Standard Forms | Sheet, Rod, Tube, Film, Pellets |
Chemical Composition
Virgin PEEK consists of pure polyether ether ketone polymer without reinforcing additives.
| Component | Function |
|---|---|
| Polyether Ether Ketone Polymer | Structural Matrix |
| Additives | None or Minimal Processing Stabilizers |
The absence of fillers provides superior purity, toughness, and electrical insulation.
Mechanical Properties
Typical Values
| Property | Value |
|---|---|
| Tensile Strength | 90–100 MPa |
| Yield Strength | 95–105 MPa |
| Elongation at Break | 20–50% |
| Flexural Strength | 140–165 MPa |
| Flexural Modulus | 3.5–4.1 GPa |
| Hardness | Rockwell M95–100 |
| Compressive Strength | 115–135 MPa |
Typical Mechanical Performance
| Property | Performance |
|---|---|
| Toughness | Outstanding |
| Strength | Excellent |
| Fatigue Resistance | Excellent |
| Creep Resistance | Excellent |
Virgin PEEK offers higher ductility and toughness than reinforced PEEK grades.
Physical Properties
| Property | Value |
|---|---|
| Density | 1.30–1.32 g/cm³ |
| Water Absorption | 0.1–0.5% |
| Thermal Conductivity | 0.25 W/m·K |
| Specific Heat Capacity | 1300 J/kg·K |
| Coefficient of Thermal Expansion | 47–55 ×10⁻⁶/°C |
Virgin PEEK exhibits excellent dimensional stability under varying environmental conditions.
Thermal Properties
| Property | Value |
|---|---|
| Melting Point | 343°C |
| Glass Transition Temperature | 143°C |
| Heat Deflection Temperature | 150–160°C |
| Continuous Service Temperature | Up to 250°C |
| Short-Term Service Temperature | Up to 300°C |
Virgin PEEK maintains mechanical performance across a wide temperature range.
Strength-to-Weight Ratio
| Material | Density (g/cm³) | Tensile Strength |
|---|---|---|
| Virgin PEEK | 1.31 | 95 MPa |
| PTFE | 2.18 | 30 MPa |
| POM | 1.42 | 70 MPa |
| Aluminum 6061 | 2.70 | 310 MPa |
Virgin PEEK delivers exceptional performance while remaining lightweight.
Chemical Resistance
| Chemical Environment | Performance |
|---|---|
| Water | Excellent |
| Acids | Excellent |
| Alkalis | Excellent |
| Steam | Excellent |
| Hydrocarbons | Excellent |
| Solvents | Excellent |
| Salt Solutions | Excellent |
| Cleaning Agents | Excellent |
Virgin PEEK is resistant to nearly all industrial chemicals and cleaning processes.
Hydrolysis Resistance
| Property | Performance |
|---|---|
| Steam Resistance | Outstanding |
| Hot Water Resistance | Outstanding |
| Hydrolysis Stability | Outstanding |
| Sterilization Resistance | Outstanding |
Virgin PEEK is ideal for repeated steam sterilization cycles.
Wear Resistance
| Property | Performance |
|---|---|
| Abrasion Resistance | Excellent |
| Sliding Wear Resistance | Excellent |
| Surface Durability | Excellent |
| Friction Performance | Good |
While reinforced grades offer improved wear resistance, Virgin PEEK performs exceptionally well in most engineering applications.
Electrical Properties
| Property | Value |
|---|---|
| Volume Resistivity | >10¹⁵ Ω·cm |
| Surface Resistivity | >10¹³ Ω |
| Dielectric Strength | 17–25 kV/mm |
| Dielectric Constant | 3.2–3.4 |
Virgin PEEK provides superior electrical insulation compared with conductive-filled grades.
Biocompatibility
| Property | Performance |
|---|---|
| Medical Compatibility | Excellent |
| Cytotoxicity Resistance | Excellent |
| Implant Suitability | Excellent |
| Sterilization Compatibility | Outstanding |
Medical-grade Virgin PEEK is widely used for long-term implantable devices.
Machinability
| Process | Rating |
|---|---|
| CNC Milling | Excellent |
| CNC Turning | Excellent |
| Drilling | Excellent |
| Tapping | Excellent |
| Precision Machining | Outstanding |
Machinability Comparison
| Material | Machinability |
|---|---|
| Virgin PEEK | Excellent |
| Carbon-Filled PEEK | Good |
| Glass-Filled PEEK | Good |
| POM | Outstanding |
Virgin PEEK machines more easily than reinforced PEEK grades and produces less tool wear.
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| CNC Machining | Outstanding |
| Injection Molding | Excellent |
| Compression Molding | Excellent |
| Extrusion | Excellent |
| Additive Manufacturing | Good |
Virgin PEEK is commonly used for high-precision components requiring exceptional purity.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ISO | PEEK Natural |
| ASTM | Virgin PEEK |
| DIN | PEEK Natural |
| JIS | PEEK Natural |
| GB/T (China) | 纯PEEK（未填充聚醚醚酮） |
| FDA | Food Grade Available |
| USP Class VI | Medical Grade Available |
Available Forms
| Product Type | Availability |
|---|---|
| Sheet | Yes |
| Rod | Yes |
| Tube | Yes |
| Film | Yes |
| Pellets | Yes |
| Precision Machined Parts | Yes |
Typical Applications
Medical Industry
- Spinal Implants
- Trauma Fixation Devices
- Dental Components
- Surgical Instruments
Semiconductor Industry
- Wafer Handling Components
- High-Purity Fixtures
- Insulating Components
- Process Equipment Parts
Aerospace Industry
- Lightweight Structural Parts
- Electrical Connectors
- Sensor Components
- High-Temperature Insulators
Food & Pharmaceutical Industry
- Sterilizable Equipment Parts
- Processing Components
- FDA-Compliant Components
Electrical Industry
- Insulators
- Connector Housings
- High-Voltage Components
Precision Engineering
- Bearings
- Bushings
- Wear Components
- High-Tolerance Machined Parts
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| CNC Machining | Outstanding |
| Injection Molding | Excellent |
| Compression Molding | Excellent |
| Precision Manufacturing | Outstanding |
Advantages
Highest Purity PEEK Grade
No fillers or reinforcing additives.
Outstanding Toughness
Better ductility than reinforced PEEK grades.
Excellent Chemical Resistance
Resists aggressive industrial environments.
Exceptional Temperature Resistance
Continuous operation up to 250°C.
Superior Electrical Insulation
Ideal for electronic and semiconductor applications.
Medical and Food Contact Compatibility
Available in FDA and USP Class VI compliant grades.
Limitations
Higher Cost
More expensive than standard engineering plastics.
Lower Stiffness Than Reinforced Grades
Glass-filled and carbon-filled PEEK offer greater rigidity.
Lower Wear Resistance Than Bearing Grades
Specialized bearing grades perform better under extreme wear conditions.
Specialized Processing Requirements
Requires high-temperature manufacturing equipment.
Comparison with Other PEEK Grades
| Property | Virgin PEEK | Glass-Filled PEEK | Carbon-Filled PEEK |
|---|---|---|---|
| Purity | Highest | Moderate | Moderate |
| Toughness | Highest | Lower | Lower |
| Stiffness | Good | Excellent | Outstanding |
| Electrical Insulation | Excellent | Good | Reduced |
| Machinability | Excellent | Good | Good |
Comparison with PTFE
| Property | Virgin PEEK | PTFE |
|---|---|---|
| Mechanical Strength | Much Higher | Lower |
| Wear Resistance | Better | Moderate |
| Chemical Resistance | Excellent | Outstanding |
| Temperature Resistance | Excellent | Excellent |
| Electrical Insulation | Excellent | Outstanding |
Available Surface Finishes
Standard Finishes
- Natural Machined Finish
- Molded Finish
- Precision Ground Finish
Functional Finishes
- Polished Surface
- Medical Finish
- Semiconductor Grade Finish
Specialty Grades
- Medical Grade Virgin PEEK
- FDA Food Grade PEEK
- Semiconductor Grade PEEK
- Implant Grade PEEK
- High-Purity PEEK
Frequently Asked Questions (FAQ)
What is Virgin PEEK?
Virgin PEEK is the pure, unfilled version of Polyether Ether Ketone, offering exceptional strength, purity, chemical resistance, and thermal stability.
What is Virgin PEEK used for?
Typical applications include:
- Medical Implants
- Semiconductor Equipment
- Aerospace Components
- Electrical Insulators
- Precision Machined Parts
Is Virgin PEEK stronger than PTFE?
Yes. Virgin PEEK offers significantly higher mechanical strength and wear resistance.
Is Virgin PEEK biocompatible?
Yes. Medical-grade Virgin PEEK is widely used for implantable devices.
Can Virgin PEEK be machined?
Yes. Virgin PEEK provides excellent CNC machining performance and dimensional stability.
Why choose Virgin PEEK?
Because it combines:
- High Purity
- Exceptional Strength
- Outstanding Chemical Resistance
- High Temperature Stability
- Medical Compatibility
What is the difference between Virgin PEEK and Carbon-Filled PEEK?
Virgin PEEK provides better purity, toughness, and electrical insulation, while carbon-filled PEEK offers higher stiffness and wear resistance.
Does GCNOV provide Virgin PEEK manufacturing services?
Yes. GCNOV provides:
- Virgin PEEK CNC Machining
- Medical Grade Manufacturing
- Semiconductor Component Production
- Precision Machined Parts
- Prototype Development
- Low-Volume Production
- Mass Production
- Custom High-Performance Plastic Components