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Preliminary datasheet

PK – Polyketone PK GF15

AKROTEK® PK-VM GF 15 black (8686)

AKROTEK® PK-VM GF 15 black (8686) is a 15% glass fibre reinforced Polyketone with average stiffness and strength. Due to its very good media resistance, the material is suitable for use in applications that carry cooling water.

This type was developed as the successor to PK-VM GF 15 schwarz (5091) in order to meet the requirements for a larger processing window during processing.


Tensile Modulus
Tensile Strength
Impact Strength
  • Mechanical Properties

    Tensile modulus (1 mm/min | ISO 527-2) d.a.m. 4500 MPa

    Stress at break (5 mm/min | ISO 527-2) d.a.m. 90 MPa

    Strain at break (5 mm/min | ISO 527-2) d.a.m. 4 %

    Charpy impact strength (23°C | ISO 179-1/1eU) d.a.m. 50 kJ/m²

    Charpy notched impact strength (23°C | ISO 179-1/1eA) d.a.m. 10 kJ/m²

  • Thermal Properties

    Melting temperature (DSC, 10K/min | DIN EN ISO 11357-3) 220 °C

  • Flammability

    Burning rate (UL 94)
    1,6mm Wall thickness HB Class

    Burning rate (<100 mm/min) (> 1 mm Thickness | FMVSS 302) +

  • General properties

    Density (23°C | ISO 1183) 1,35 g/cm³

    Humidity absorption (70°C, 62% r.H. | ISO 1110) 0,7 - 0,8 %

    Molding shrinkage (flow | ISO 294-4) 0,5-0,7 %

    Molding shrinkage (transverse | ISO 294-4) 1,1-1,3 %

Processing information

The listed values are recommendations. Higher values should be used for higher glass loadings. We recommend only de-humidifying or vacuum dryers. Extensive drying can cause filling problems and surface defects.

6 Drying time 0 - 4 h

Drying temperature (τ ≤ -30°C) 80°C

Processing moisture 0,02 - 0,1%

1 Feed section 60 - 80°C

2 Temperature zone 1 - Zone 4 220 - 260°C

3 Nozzle temperature 230 - 260°C

4 Melt temperature 230 - 260°C

5 Mold temperature 60 - 120°C

P Nach Holding pressure, spec. 300 - 800 bar

P Stau Back pressure, spec. 30 - 70 bar

Injection speed medium to high

Screw speed 8 - 15 m/min


Polyketones crosslink depending on time and temperature, crosslinking is noticed by an increase of viscosity and/or dark spots in natural colored compounds. The melt temperature should be at or below 260 °C and under no circumstances go beyond 270 °C because crosslinking speed will increase. The residence time in the barrel including the hot runner should not exceed 10 min. If interruptions of more than 10 minutes are expected, the barrel and hot runner need to be purged and cleaned with polyolefins. The molding machine needs to be purged with polyolefines before and after processing of AKROTEK® PK! There is a risk of cross linking caused by reactions with POM or PA as well as unsuitable masterbatches! Crosslinking is noticed by an increase of viscosity and or dark spots in natural colored compounds. In this case purge immediately with polyolefines.


All specifications and information given on this website are based on our current knowledge and experience. A legally binding promise of certain characteristics or suitability for a concrete individual case cannot be derived from this information. The information supplied here is not intended to release processors and users from the responsibility of carrying out their own tests and inspections in each concrete individual case. AKRO®, AKROMID®, AKROLEN®, AKROLOY®, AKROTEK®, ICX® and PRECITE® are registered trademarks of the Feddersen Group.

AKROTEK® PK - Good Chemical Resistance


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