PK – Polyketone PK GF30
AKROTEK® PK-VM GF 30 black (8655)AKROTEK® PK-VM GF 30 black (8655) is a 30% glass fiber reinforced Polyketone with average stiffness and strength. Due to its very good media resistance, the material is suitable for the use in applications that carry cooling water.
This type was developed as the successor to PK-VM GF 30 black (4896) in order to meet the requirements for a larger processing window during processing.
Properties
Tensile Modulus Tensile Strength Impact Strength-
Mechanical Properties
Tensile modulus (1 mm/min | ISO 527-2) d.a.m. 8500 MPa
Stress at break (5 mm/min | ISO 527-2) d.a.m. 130 MPa
Strain at break (5 mm/min | ISO 527-2) d.a.m. 3,2 %
Flexural modulus (2 mm/min | ISO 178) d.a.m. 8200 MPa
Flexural strength (2 mm/min | ISO 178) d.a.m. 210 MPa
Charpy impact strength (23°C | ISO 179-1/1eU) d.a.m. 70 kJ/m²
Charpy impact strength (-30°C | ISO 179-1/1eU) d.a.m. 75 kJ/m²
Charpy impact strength (-40°C | ISO 179-1/1eU) d.a.m. 70 kJ/m²
Charpy notched impact strength (-30°C | ISO 179-1/1eA) d.a.m. 11 kJ/m²
Charpy notched impact strength (-40°C | ISO 179-1/1eA) d.a.m. 10 kJ/m²
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Thermal Properties
Temperature of deflection under load HDT/A (1,8 MPa | ISO 75) 215 °C
Melting temperature (DSC, 10K/min | DIN EN ISO 11357-3) 215 °C
Coefficent of linear thermal expansion, parallel (23°C bis 80°C | ISO 11359-1/2) 0,18 1,0E-4/K
Coefficent of linear thermal expansion, transverse (23°C bis 80°C | ISO 11359-1/2) 1,16 1,0E-4/K
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Flammability
Burning rate (UL 94) 1,6mm Wall thickness HB Class
GWFI (IEC 60695-2-12) 0,8mm Wall thickness 725 °C 1,6mm Wall thickness 725 °C
HWI (UL 746A) 1,6mm Wall thickness 1 PLC
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General properties
Density (23°C | ISO 1183) 1,48 g/cm³
Humidity absorption (70°C, 62% r.H. | ISO 1110) 0,6 - 0,7 %
Molding shrinkage (flow | ISO 294-4) 0,3-0,5 %
Molding shrinkage (transverse | ISO 294-4) 0,8-1,0 %
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Electrical Properties
Volume resistivity (IEC 60093) d.a.m. 5E+13 Ω · cm
Volume resistivity (DIN EN 62631-3-1) d.a.m. 5E+13 Ω · cm
Surface resistivity (DIN EN 62631-3-2) d.a.m. 1E+12 Ω
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.
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Drying time | 0 - 4 h |
| Drying temperature (τ ≤ -30°C) | 80°C | |
| Processing moisture | 0,02 - 0,1% | |
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Feed section | 60 - 80°C |
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Temperature zone 1 - Zone 4 | 220 - 260°C |
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Nozzle temperature | 230 - 260°C |
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Melt temperature | 230 - 260°C |
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Mold temperature | 60 - 120°C |
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Holding pressure, spec. | 300 - 800 bar |
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Back pressure, spec. | 30 - 70 bar |
| Injection speed | medium to high | |
| Screw speed | 8 - 15 m/min | |
Warning
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.
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.
