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PK – Polyketone PK

AKROTEK® PK-VM natural (4774)

PK-VM natural (4774) is an unreinforced Polyketone with high flowability. The outstanding friction and wear properties enable the use for demanding components exposed to tribological stress. PK is characterized by its outstanding media resistance, which qualifies it to be used for components that are in contact with chemicals. The most important markets for AKROTEK® PK are the automotive and furniture industry and mechanical engineering.

Properties

Tensile Modulus
Tensile Strength
Impact Strength
  • Mechanical Properties

    Tensile modulus (1 mm/min | ISO 527-2) d.a.m. 1500 MPa
    conditioned 1500 MPa

    Stress at yield (50 mm/min | ISO 527-2) d.a.m. 60 MPa
    conditioned 60 MPa

    Strain at break (50 mm/min | ISO 527-2) d.a.m. > 200 %
    conditioned > 200 %

    Flexural modulus (2 mm/min | ISO 178) d.a.m. 1900 MPa
    conditioned 1500 MPa

    Flexural strength (2 mm/min | ISO 178) d.a.m. 70 MPa
    conditioned 70 MPa

    Charpy impact strength (23°C | ISO 179-1/1eU) d.a.m. n.b.
    conditioned n.b.

    Charpy impact strength (-30°C | ISO 179-1/1eU) d.a.m. n.b.

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

    Charpy notched impact strength (-30°C | ISO 179-1/1eA) d.a.m. 3,5 kJ/m²

  • Thermal Properties

    Temperature of deflection under load HDT/A (1,8 MPa | ISO 75) 100 °C

    Temperature of deflection under load HDT/B (0,45 MPa | ISO 75) 190 °C

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

    Coefficent of linear thermal expansion, parallel (23°C bis 80°C | ISO 11359-1/2) 1,11 1,0E-4/K

    Coefficent of linear thermal expansion, transverse (23°C bis 80°C | ISO 11359-1/2) 1,11 1,0E-4/K

    Thermal conductivity (DIN 52612) 0,255 W/mK

  • 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) 1,24 g/cm³

    Humidity absorption (70°C, 62% r.H. | ISO 1110) 0,8 - 0,9 %

    Molding shrinkage (flow | ISO 294-4) 1,7 - 1,9 %

    Molding shrinkage (transverse | ISO 294-4) 1,9 - 2,1 %

  • Electrical Properties

    Volume resistivity (IEC 60093) d.a.m. 1,0E+13 Ω · cm
    conditioned 1,0E+10 Ω · cm

    Volume resistivity (DIN EN 62631-3-1) d.a.m. 1,0E+13 Ω · cm
    conditioned 1,0E+10 Ω · cm

    Surface resistivity (DIN EN 62631-3-2) d.a.m. 1,0E+13 Ω
    conditioned 1,0E+10 Ω

    Comparative tracking index (Test liquid A | IEC 60112) 600 V

  • Rheological Properties

    MVR (240°C/2,16kg | ISO 1133) 60 cm³/10min

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 - 250°C

3 Nozzle temperature 230 - 250°C

4 Melt temperature 230 - 250°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

Warning

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 master batches! Cross linking is visible through dark spots! In this case purge immediately with polyolefines.

Disclaimer

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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