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20% Carbon Fiber Polyketone for Tribological Parts — Exablend® POK CF20 S

Description

Exablend® POK CF20 S is a 20% carbon fiber-reinforced, tribologically modified polyketone. A compound for injection-molded precision parts requiring high stiffness (tensile modulus of 12,700 MPa), dimensional stability and controlled electrical conductivity: surface resistivity of ~10³ Ω enables use in static-dissipative assemblies, including fuel-system components.

The key advantage over carbon-filled PA66 CF is moisture uptake of just 0.4% (23 °C, 50% RH): part geometry and mechanics remain stable in humid environments — critical for precision friction pairs and seals. The chemical resistance of the polyketone matrix to fuels and aggressive media completes the profile.

HDT of 213 °C at 1.8 MPa and a melting point of 220 °C support service in hot zones. Processing is standard for POK: melt 235–250 °C, mold 80 °C, pressure 80–130 MPa.

Carbon-filled polyketone with static-dissipative properties and minimal moisture uptake

Applications: fuel-system components, seals and precision friction pairs, static-dissipative parts, dimensionally stable technical components for chemically aggressive environments.

Typical properties:

parameter

unit

value

General properties:

Density

g/cm³

1.30 (ISO 1183-1)

Carbon fiber content

20 (ISO 3451-1)

Melt volume-flow rate MVR (240 °C, 2.16 kg)

cm³/10 min

9 (ISO 1133)

Molding shrinkage, flow / transverse

0.4 / 1.1 (ISO 294-4)

Moisture absorption (23 °C, 50% RH)

0.4 (ISO 62)

Mechanical properties:

Tensile modulus

MPa

12700 (ISO 527-2)

Tensile strength

MPa

155 (ISO 527-2)

Strain at break

2 (ISO 527-2)

Charpy unnotched impact strength, 23 °C

kJ/m²

40 (ISO 179)

Thermal properties:

Melting point, DSC

°C

220 (ISO 11357-1/-3)

Glass transition temperature

°C

HDT (1.8 MPa)

°C

213 (ISO 75-1/-2)

CLTE flow / transverse (23–80 °C)

1/K

5.8×10⁻⁵ / 8.8×10⁻⁵ (ISO 11359)

Electrical properties:

Surface resistivity

~10³

Processing recommendations:

Melt temperature

°C

235–250

Mold temperature

°C

Molding pressure

MPa

80–130

Injection speed

—

medium to high

The stated values are measured by internal test methods close to the corresponding ISO and GOST standards. The information is for reference only; we recommend using the technical data after agreement with the supplier and signing of a normative technical specification.