High-performance PEEK for Demanding Engineering Applications
Fluorinoid® FL350 Virgin PEEK
Fluorinoid® FL350 is a virgin PEEK (polyether ether ketone) material offering a combination of high mechanical performance, chemical resistance, wear resistance, temperature capability and electrical properties.
PEEK is a high-performance engineering thermoplastic with good chemical resistance, good wear resistance, high maximum use temperature, low flammability, excellent electrical properties and good radiation resistance.
Fluorinoid® FL350 is available in different processed forms, including injection moulded, extruded, spun and compression moulded material.
Key Properties of FL350 PEEK
- High-performance engineering thermoplastic
- Good chemical resistance
- Good wear resistance
- High maximum use temperature
- Low flammability
- Excellent electrical properties
- Good radiation resistance
- High tensile strength
- High hardness
- Available in multiple processed forms
Typical Physical Properties
The following values are typical physical properties for Fluorinoid® FL350 virgin PEEK.
| Property | Unit | Injection Moulded | Extruded | Spun | Compression Moulded |
|---|---|---|---|---|---|
| Specific Gravity (±0.03) | — | 1.30 | 1.30 | 1.32 | 1.32 |
| Tensile Strength (Min) | MPa | 100 | 95 | 95 | 65 |
| Elongation (Min) | % | 80 | 60 | 20 | 5 |
| Hardness (Shore D) | — | 80–90 | 80–90 | 80–90 | 80–90 |
| Maximum Temperature | °C | 260 | 260 | 260 | 260 |
| Minimum Temperature – All Applications | °C | -50 | -50 | -50 | -50 |
| Minimum Temperature – Application Specific Only | °C | -150 | -150 | -150 | -150 |
The data provides the specific gravity, tensile strength and elongation values by processing method, while hardness and temperature information is given as material values.
What is PEEK?
PEEK, or polyether ether ketone, is a high-performance engineering thermoplastic designed for demanding applications where a combination of mechanical, thermal, chemical and electrical properties is required.
Fluorinoid® FL350 is virgin PEEK, providing the inherent properties of the PEEK polymer without the addition of reinforcing fillers.
PEEK has good chemical resistance, good wear resistance, a high maximum use temperature, low flammability, excellent electrical properties and good radiation resistance.
Chemical Resistance
PEEK provides good chemical resistance, making it suitable for engineering applications where components may be exposed to demanding chemical environments.
Chemical compatibility should always be assessed against the specific chemicals, concentrations, temperatures and exposure conditions encountered in the application.
Wear Resistance
FL350 provides good wear resistance, making PEEK suitable for applications where resistance to wear is an important component requirement.
The actual performance of a PEEK component will depend on factors including loading, contact conditions, temperature, component geometry and operating environment.
Temperature Performance
Fluorinoid® FL350 has a stated maximum temperature of 260°C.
- -50°C for all applications
- -150°C for application-specific use only
This distinction is important when considering FL350 for low-temperature applications. Applications operating below -50°C should be assessed specifically for the intended conditions.
Mechanical Strength
FL350 provides high tensile strength, with the typical minimum value varying according to the processing method.
| Processing Method | Minimum Tensile Strength |
| Injection moulded | 100 MPa |
| Extruded | 95 MPa |
| Spun | 95 MPa |
| Compression moulded | 65 MPa |
The data therefore demonstrates that the processing method can have a significant effect on the reported mechanical properties of the material.
Elongation
The minimum elongation values specified for FL350 also vary according to processing method:
| Processing Method | Minimum Elongation |
| Injection moulded | 80% |
| Extruded | 60% |
| Spun | 20% |
| Compression moulded | 5% |
When selecting PEEK for a component, the required mechanical performance should therefore be considered alongside the manufacturing method and final component geometry.
Hardness
Fluorinoid® FL350 has a Shore D hardness of 80–90.
Hardness is an important consideration when selecting a material for components exposed to mechanical contact, wear or demanding operating conditions.
Electrical Properties
PEEK is recognised for its excellent electrical properties.
This makes FL350 suitable for applications where electrical performance is an important part of the material-selection process, alongside its mechanical and thermal characteristics.
Radiation Resistance
PEEK has good radiation resistance, this is one of the material's key characteristics.
This can make PEEK an option for applications where radiation exposure forms part of the operating environment.
Specific suitability should be assessed against the type, intensity and duration of radiation involved.
Low Flammability
FL350 PEEK has low flammability.
This is an important consideration in applications where material behaviour around elevated temperatures or potential ignition sources forms part of the design requirements.
Available Processing Forms
Fluorinoid® FL350 provides typical physical property data for four processing forms:
Injection Moulded
Injection moulded FL350 has a minimum tensile strength of 100 MPa and minimum elongation of 80%.
Extruded
Extruded FL350 has a minimum tensile strength of 95 MPa and minimum elongation of 60%.
Spun
Spun FL350 has a minimum tensile strength of 95 MPa and minimum elongation of 20%.
Compression Moulded
Compression moulded FL350 has a minimum tensile strength of 65 MPa and minimum elongation of 5%.
The available processing route should be considered alongside the required component geometry, mechanical properties and manufacturing requirements.
Why choose PEEK?
PEEK is used when a combination of high-performance engineering properties is required.
Fluorinoid® FL350 offers:
- Good chemical resistance
- Good wear resistance
- High maximum use temperature
- Low flammability
- Excellent electrical properties
- Good radiation resistance
- High tensile strength
- High hardness
The appropriate PEEK processing form should be selected according to the specific requirements of the component and application.
Need help selecting the right Engineering Polymer?
Selecting a high-performance polymer involves more than comparing individual datasheet values.
Temperature, mechanical loading, wear, chemical exposure, electrical requirements, radiation, component geometry and manufacturing method can all influence material selection.
Talk to Fluorocarbon about your application and our engineering team can help you assess the material requirements and identify a suitable solution.
Frequently Asked Questions
What is Fluorinoid® FL350?
Fluorinoid® FL350 is Fluorocarbon's virgin PEEK (polyether ether ketone) material. It is a high-performance engineering thermoplastic with good chemical and wear resistance, high maximum use temperature, low flammability, excellent electrical properties and good radiation resistance.
What is PEEK?
PEEK stands for polyether ether ketone. It is a high-performance engineering thermoplastic used where a combination of mechanical, thermal, chemical, wear and electrical properties is required.
What is virgin PEEK?
Virgin PEEK is PEEK without reinforcing fillers or other additives.
What is the maximum temperature of FL350 PEEK?
PEEK has a maximum temperature of 260°C.
What is the minimum temperature of FL350?
FL350 has a minimum temperature of -50°C for all applications, however it can operate at -150°C for application-specific use only.
Is FL350 suitable for low-temperature applications?
FL350 can be considered for low-temperature applications. Our datasheet specifies -50°C for all applications and -150°C for application-specific applications. Applications below -50°C should therefore be assessed specifically for the intended operating conditions.
What is the tensile strength of FL350 PEEK?
The minimum tensile strength varies according to processing method:
- Injection moulded: 100 MPa
- Extruded: 95 MPa
- Spun: 95 MPa
- Compression moulded: 65 MPa
What is the hardness of FL350 PEEK?
FL350 has a Shore D hardness of 80–90.
Is PEEK chemically resistant?
Yes. FL350 has good chemical resistance and is one of the material's key properties.
Is PEEK wear resistant?
Yes. FL350 is identified as having good wear resistance.
Does PEEK have good electrical properties?
Yes. FL350 has excellent electrical properties and is one of the material's key characteristics.
Is PEEK radiation resistant?
FL350 has good radiation resistance.
What forms is FL350 PEEK available in?
FL350 can be injection moulded, extruded, spun and compression moulded.
Which PEEK processing method should I choose?
The appropriate processing method depends on the required component geometry, manufacturing requirements and desired material properties. The FL350 datasheet shows that tensile strength and elongation vary according to the processing method.
Are the FL350 datasheet values guaranteed specifications?
No. The datasheet states that the figures are typical values for the material and do not represent a product specification. Properties can vary depending on the source of raw material, method of processing, physical form of the product, direction of measurement and other factors.
Can Fluorocarbon help with PEEK material selection?
Yes. Fluorocarbon can help assess the requirements of an application and determine whether FL350 PEEK is appropriate for the intended component and operating conditions.
Technical Information
Material Reference: FLUORINOID® FL350
Material: Virgin PEEK (Polyether Ether Ketone)
Registered trademark: Fluorinoid® is a registered trademark of Fluorocarbon Group.
Technical Disclaimer
The figures provided on this page are typical values for the material and do not represent a product specification.
Properties will vary depending on the source of raw material, method of processing, physical form of the product, direction of measurement and other factors.
For application-specific requirements or certified material properties, please contact Fluorocarbon.
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