PPA – Polyphthalamide PPA GF40AKROMID® T9 GF 40 4 black (7828)
AKROMID® T9 GF 40 4 schwarz (7828) is a 40% glass fibre reinforced polyphthalamide with medium stiffness and strength, as well as high chemical resistance.
The compound is based on PA9T and has lower moisture uptake than conventional PA6T variants. This leads to a significantly higher consistency of the glass transition temperature and higher strength at elevated temperatures especially in conditioned state.
Tensile modulus (1 mm/min | ISO 527-2) d.a.m. 12500 MPa
Stress at break (5 mm/min | ISO 527-2) d.a.m. 225 MPa
Strain at break (5 mm/min | ISO 527-2) d.a.m. 2,9 %
Charpy impact strength (23°C | ISO 179-1/1eU) d.a.m. 90 kJ/m²
Charpy notched impact strength (23°C | ISO 179-1/1eA) d.a.m. 15 kJ/m²
Melting temperature (DSC, 10K/min | DIN EN ISO 11357-3) 305 °C
Burning rate (UL 94) 1,6mm Wall thickness HB Class
Density (23°C | ISO 1183) 1,47 g/cm³
Molding shrinkage (flow | ISO 294-4) 0,1-0,3 %
Molding shrinkage (transverse | ISO 294-4) 0,6-0,8 %
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)||120°C|
|Processing moisture||0,02 - 0,1%|
|Feed section||60 - 90°C|
|Temperature zone 1 - Zone 4||310 - 340°C|
|Nozzle temperature||320 - 340°C|
|Melt temperature||320 - 340°C|
|Mold temperature||120 - 160°C|
|Holding pressure, spec.||300 - 800 bar|
|Back pressure, spec.||50 - 150 bar|
|Injection speed||medium to high|
|Screw speed||8 - 15 m/min|
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.