PK – Polyketone PK
AKROTEK® PK-VM 8 natural (6146)
AKROTEK® PK-VM 8 natural (6146) is an unreinforced, low viscous polyketone with light inherent color. The material is suitable for drinking water contact and meets the requirements according to KTW, DVGW W270, ACS, WRAS as well as NSF61. Moreover the material corresponds to the European food guideline EU 10/2011 and to the American FDA 21 CFR.
Technical and tribological components with high demands on chemical resistance as well as friction and wear behaviour.
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.
|Drying time||0 - 4 h|
|Drying temperature (τ ≤ -30°C)||80°C|
|Processing moisture||0,02 - 0,1%|
|Feed section||60 - 80°C|
|Temperature zone 1 - Zone 4||220 - 250°C|
|Nozzle temperature||230 - 250°C|
|Melt temperature||230 - 250°C|
|Mold temperature||60 - 120°C|
|Holding pressure, spec.||300 - 800 bar|
|Back pressure, spec.||30 - 70 bar|
|Injection speed||medium to high|
|Screw speed||8 - 15 m/min|
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.
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 %
Charpy impact strength (23°C | ISO 179-1/1eU) d.a.m. n.b. conditioned n.b.
Charpy notched impact strength (23°C | ISO 179-1/1eA) d.a.m. 10 kJ/m² conditioned 10 kJ/m²
Temperature of deflection under load HDT/A (1,8 MPa | ISO 75) 100 °C
Melting temperature (DSC, 10K/min | DIN EN 11357-1) 220 °C
Burning rate (UL 94) 1,6mm Wall thickness HB Class
Burning rate (<100 mm/min) (> 1 mm Thickness | FMVSS 302) +
Density (23°C | ISO 1183) 1,24 g/cm³
Humidity absorption (70°C, 62% r.H. | ISO 1110) 0,8-0,9 %
Water absorption 23°C saturated (23°C, saturated | ISO 62) 2,2 %
Molding shrinkage (flow | ISO 294-4) 1,4-1,6 %
Molding shrinkage (transverse | ISO 294-4) 1,5-1,7 %
MVR (240°C/2,16kg | ISO 1133) 60 cm³/10min
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.
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