1. Introduction to PEEK (polyetheretherketone) cable
PEEK insulated wires have outstanding high and low temperature resistance, flame retardancy, radiation resistance and good mechanical properties, making them suitable for use as ultra-high temperature conductors in the aviation industry; they can be used as winding wires and connecting wires for submersible pump motors in the petroleum industry, and as winding coils for nuclear island drive mechanisms in atomic power plants for long-term use under irradiation conditions; PEEK insulated wires have excellent properties such as seawater resistance, light weight, small size and flame retardancy, making them suitable for use in ships; they are used in high-speed traction locomotives.

1. Halogen-free performance
PEEK material molecules do not contain halogen atoms, and do not produce acidic and toxic gases after combustion. It complies with EU RoSH and other environmental protection requirements and is an environmentally friendly material.
2. Volume resistance
In a wide temperature range, ordinary PEEK polymer can still maintain a very high volume resistivity value. At 23°C, the volume resistivity of PEEK is above 6 × 10 13 Ωm; at 140°C, its volume resistivity is above 8 × 10 12 Ωm; and at 200°C, its volume resistivity is above 6 × 10 9 Ωm, still having excellent insulation properties.
3. Surface resistance
The surface resistivity of PEEK at 25°C and 50% humidity reaches 2.0 × 10 16 Ω, which is superior to fluoroplastics, polyamide, polyimide and other plastics.
4. Dielectric constant and dielectric loss factor
The dielectric constant of PEEK5600G is only 3.2, which is slightly higher than polyethylene (PE) and fluoroplastics, but much lower than polyvinyl chloride (PVC). In the frequency range of 10 9 Hz, ordinary PEEK polymer has good electrical properties. Many of the electrical properties of this material are in line with the typical properties of thermoplastic materials, and PEEK polymer also maintains these excellent insulation properties over a very wide temperature and frequency range. Below 140°C, the tanδ loss of PEEK material is small. PPS is polyphenylene sulfide, PES is polyethersulfone, PC is polycarbonate, and PSU is bisphenol A type polysulfone.
5. Heat resistance
PEEK polymer has a glass transition temperature of 143℃. Since it is a semi-crystalline thermoplastic material, it can still maintain excellent mechanical properties near the melting point of 343℃. Its fatigue resistance and creep resistance are higher than those of thermoplastics.
6. Flame retardancy
PEEK is self-extinguishing. Without adding flame retardant, the UL standard reaches 94V-1 (thickness 0.3 mm), 94V-0 (thickness 1.5 mm), and 94V-5 (thickness 3.2 mm). In addition, the amount of smoke generated during combustion is very small.
7. Environmental resistance
PEEK only dissolves in concentrated sulfuric acid and has good chemical resistance, especially in terms of acid and alkali resistance at high temperature, which is much better than polyimide. At the same time, PEEK has a very low water absorption rate, and the saturated water absorption rate at 23℃ is only 0.5%. It also has good hot water resistance and can be used in pressurized hot water or steam at 300℃.
8. Radiation resistance
It has a strong ability to resist γ-ray radiation, which exceeds the radiation resistance of polystyrene among general resins. It can be made into wires that can still maintain good insulation performance when the γ-ray radiation dose reaches 850KGy.
2. PEEK cable specifications
Outer diameter 3mm Inner diameter 2.5 Outer diameter 3mm Inner diameter 2.6 Outer diameter 3mm Inner diameter 2mm (can be customized)
The PEEK cable wire extrusion production equipment introduced by the company can extrude PEEK cables of various specifications according to customer needs. Welcome to consult and purchase!
3. Process Capability
1. Applicable conductors: single core, composite core wire, braided core wire, and sheathed wire can also be produced;
2. Applicable conductor diameter: 0.50mm2~6.0mm2 copper wire or core wire sheath extrusion, coating thickness: 0.05~0.30mm;
3. Coating material: PEEK polyetheretherketone material, main machine extrusion capacity: 28KG/H (approximately);
4. Coating outer diameter: 0.75mm~Φ5.0mm (max outer diameter of sheath: Φ6.0mm);
5. Flat electromagnetic wire (reserved function): 3.30mm*11.40mm (within the range of 2.0mm*12.0mm), coating thickness: 0.20~0.70mm;
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What is PEEK?
PEEK and its modified composite materials show excellent performance under high temperature and high humidity conditions. PEEK have excellent chemical corrosion resistance, self-lubricating, and wear-resistant properties, so it has become the most ideal material to replace copper alloys and ordinary rubber. Compared with them, PEEK has longer service life which can reduce equipment operating costs, improve equipment operating reliability.


High Temperature Performance
PEEK’s performance can remain stable in the temperature range from -196°C to 260°C. Under extreme working conditions, it can withstand 300″C for a short time. The performance of PEEK is still reliable even in high temperatures of several kilometers underground work environment.

High Strength and Wear Resistance
Compared with other plastics, PEEK is resistant to compression, impact and also have good fatigue resistance. PEEK is durable in mechanical equipment and wear-resistant environments.

Double the Service Life
PEEK sealing solutions can improve the part service life. Some domestic chemical companies use the PEEK5600FE20 polytetrafluoroethylene modified material designed by JUNHUA PEEK to replace the original material, the service life of the wear parts can even be extended by 1.3-3 times.

Corrosion Resistance
PEEK is chemically inert, and has no reaction to most acids, oils, greases and all other organic and inorganic solvents or enzymes, and can still maintain good strength and dimensional stability.

Self-lubricating
PEEK has low friction coefficient, low running resistance, can be used without oil in some working conditions. The equipment is cleaner, thus improving process reliability, improving energy efficiency and saving costs.

More dom in Design
Injection molds can be used for rapid injection molding of large quantities of complex special-shaped parts, and the cost is low compared to machining.
Common PEEK Grades and Properties
1. PEEK5600G (brown-gray/khaki) is made from pure polyetheretherketone resin and offers the best toughness and impact resistance of all PEEK grades. Pure PEEK can be sterilized using convenient methods (steam, dry heat, ethanol, and gamma-rays), and the raw materials used in its manufacture comply with EU and US FDA food compatibility regulations. These characteristics make it widely used in the medical, pharmaceutical, and food processing industries.
2. PEEK5600LF30 (black) The addition of PTFE, graphite, and carbon fiber makes PEEK5600LF30 a bearing-grade plastic. Its superior tribological properties (low coefficient of friction, wear resistance, and high peak pressure limit) make it an ideal material for this class of friction applications.
3. PEEK5600GF30 (Brown-Gray): This material is a reinforced grade of plastic filled with 30% glass fiber. It offers superior rigidity, creep resistance, and dimensional stability compared to PEEK, making it ideal for structural parts. It can withstand fixed loads for extended periods at high temperatures. If PEEK5600GF30 is used as a sliding component, its suitability should be carefully verified, as the glass fiber can scratch mating surfaces.
4. PEEK5600CF30 (Black): This material is reinforced with 30% carbon fiber. It offers superior mechanical properties (higher elastic modulus, mechanical strength, and creep resistance) and wear resistance compared to PEEK5600GF30. Furthermore, carbon fiber-reinforced plastic has 3.5 times the thermal conductivity of unreinforced PEEK, dissipating heat more quickly from the bearing surface.
Mechanical Properties
Item | Test Standard or Instrument |
Unit | PEEK5600G 100% PEEK |
PEEK5600GF30 PEEK+30% glass fiber |
PEEK5600CF30 PEEK+30% carbon fiber |
PEEK5600LF30 PEEK+30% (carbon fiber +graphite+PTFE) |
PEEK5600FE20 PEEK+20%PTFE |
---|---|---|---|---|---|---|---|
Tensile Strength (23℃) | ISO 527 | MPa | 95 | 175 | 250 | 145 | 70 |
Tensile Modulus (23℃) | ISO 527 | GPa | 3.8 | 11 | 23 | 12.5 | / |
Elongation at Break (23℃) | ISO 527 | % | 35 | 2.0 | 1.5 | 2.2 | / |
Flexural Strength (23℃) | ISO 178 | MPa | 155 | 235 | 350 | 220 | 118 |
Flexural Modulus (23℃) | ISO 178 | GPa | 3.5 | 10 | 21 | 11 | / |
Charpy Impact Strength (unnotched) | ISO 179/1U | kJ/m2 | No break | 55 | 45 | 32 | No break |
Cantilever Beam Impact Strength (notched) | ISO 180/A | kJ/m2 | 4 | 6 | 6.5 | 4 | 6 |
Thermal Properties
Item | Test Standard or Instrument |
Unit | PEEK5600G 100% PEEK |
PEEK5600GF30 PEEK+30% glass fiber |
PEEK5600CF30 PEEK+30% carbon fiber |
PEEK5600LF30 PEEK+30% (carbon fiber +graphite+PTFE) |
PEEK5600FE20 PEEK+20%PTFE |
---|---|---|---|---|---|---|---|
Melting Point | ISO11357 | ℃ | 343 | 343 | 343 | 343 | 343 |
Glass Transition Temperature | ISO11357 | ℃ | 143 | 143 | 143 | 143 | 150 |
Heat Deflection Temperature | ISO 75A/B | 1.8MPa. ℃ | 152 | 315 | 315 | 293 | 150 |
Thermal Expansion Coefficient | ASTM D696 | ppm K-1 | 45 | 22 | 15 | 22 | 70 |
Thermal Conductivity | ISO /CD22007-4 | W/(m·K) | 0.29 | 0.32 | 0.95 | 0.86 | / |
Electrical Properties
Item | Test Standard or Instrument |
Unit | PEEK5600G 100% PEEK |
PEEK5600GF30 PEEK+30% glass fiber |
PEEK5600CF30 PEEK+30% carbon fiber |
PEEK5600LF30 PEEK+30% (carbon fiber +graphite+PTFE) |
PEEK5600FE20 PEEK+20%PTFE |
---|---|---|---|---|---|---|---|
Dielectric Strength (2mm) | IEC 60243-1 | kV/mm | 20 | 19 | / | / | 19 |
Dielectric Constant | IEC 62631 | – | 3.0 | 3.3 | / | / | 2.7 |
Surface Resistivity | GB/T31838.3 | Ω | 1015 | 1014 | / | / | 1015 |
Volume Resistivity | IEC 62631 | Ω·cm | 1015 | 1015 | 105 | 106 | / |
Other Properties
Item | Test Standard or Instrument |
Unit | PEEK5600G 100% PEEK |
PEEK5600GF30 PEEK+30% glass fiber |
PEEK5600CF30 PEEK+30% carbon fiber |
PEEK5600LF30 PEEK+carbon fiber +graphite+PTFE |
PEEK5600FE20 PEEK+20%PTFE |
---|---|---|---|---|---|---|---|
Color | / | / | Natural | Natural | Black | Black | Natural |
Melt Flow Index (400℃, 2.16kg) | ISO 1133 | g/10min | 6-10 | 2-5 | 1-3 | 2-5 | / |
Density | ISO 1183 | g/cm3 | 1.30±0.02 | 1.50±0.02 | 1.40±0.02 | 1.44±0.02 | 1.41±0.02 |
Water Absorption (23℃, 24Hrs) | ISO 62-1 | % | 0.07 | 0.05 | 0.04 | 0.05 | 0.15 |
Rockwell Hardness | / | HRR | 118 | 119 | 121 | 108 | 113 |
Flammability Rating | UL 94 | / | V-0 | V-0 | V-0 | V-0 | / |
Coefficient of Friction | ASTM D3702 | 100N-120rpm | 0.30-0.38 | 0.38-0.46 | 0.15-0.25 | 0.18-0.30 | 0.1-0.2 |
*This data is for reference and not a guarantee. For a more detailed data sheet, please contact our company’s technical department.