PK – Polyketone PK
AKROTEK® PK-HM 8 natural (6145)
AKROTEK® PK-HM 8 natural (6145) is an unreinforced, high viscosity polyketone with light inherent color. The compound fulfills the requirements of KTW guidline for cold and hot water as well as the W270 spreadsheet.
Technical components in domestic and industrial sector that are in contact with food and drinking water.
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|
|Melting 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.
- Mechanical Properties
Tensile modulus (1 mm/min | ISO 527-2) d.a.m. 1400 MPa Stress at yield (50 mm/min | ISO 527-2) d.a.m. 60 MPa Strain at yield (50 mm/min | ISO 527-2) d.a.m. 21 % Strain at break (50 mm/min | ISO 527-2) d.a.m. >300 % Flexural modulus (2 mm/min | ISO 178) d.a.m. 1500 MPa Flexural strength (2 mm/min | ISO 178) d.a.m. 60 MPa Charpy impact strength (23°C | ISO 179-1/1eU) d.a.m. n.b. kJ/m² Charpy notched impact strength (23°C | ISO 179-1/1eA) d.a.m. 13 kJ/m²
- Thermal Properties
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) +
- General properties
Density (23°C | ISO 1183) 1,24 g/cm³ Humidity absorption (70°C, 62% r.F. | 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 %
- Rheological Properties
MVR (240°C/2,16kg | ISO 1133) 6 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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