T9 GF 35 4 black (7858)PPA GF35

AKROMID® T9 GF 35 4 schwarz (7858) is a 35% 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.


heat stabilised 160








Mechanical Properties

Tensile modulus

ISO 527-2

1 mm/min | d.a.m.
1 mm/min | conditioned
11000 MPa
11000 MPa

Tensile stress at break

ISO 527-2

5 mm/min | d.a.m.
5 mm/min | conditioned
200 MPa
175 MPa

Tensile strain at break

ISO 527-2

5 mm/min | d.a.m.
5 mm/min | conditioned
2,5 %
2,2 %

Charpy impact strength

ISO 179-1/1eU

23°C | d.a.m.
23°C | conditioned
75 kJ/m²
100 kJ/m²

Charpy notched impact strength

ISO 179-1/1eA

23°C | d.a.m.
23°C | conditioned
12 kJ/m²
16 kJ/m²

Thermal Properties

Temperature of deflection under load HDT/A

ISO 75

1,8 MPa
270 °C

Glass transition temperature

ISO 11357-2

DSC, 2nd heating
125 °C

Melting temperature

ISO 11357-3

DSC, 10K/min
305 °C


Burning rate

UL 94

1,6 mm Wall thickness
HB Class

General properties


ISO 1183

1,41 g/cm³

Humidity absorption

ISO 1110

70°C, 62% r.H.
0,1 - 0,3 %

Molding shrinkage

ISO 294-4

0,15 - 0,35 %
0,55 - 0,75 %

Electrical Properties

Comparative tracking index

IEC 60112

Test liquid A
600 V


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.