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Preliminary datasheet

PBT – Polybutyleneterephthalate PBT GF 15

PRECITE® P3 GF 15 natural (6942)

PRECITE® P3 GF 15 natural (6942) is a 15% glass fibre reinforced, medium viscous polybutylene terephthalate (PBT) with medium stiffness and toughness as well as high dimensional stability and chemical resistance.

Typical applications

Technical and precision parts in automobile, industrial, E/E and appliances industry.

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.


6Drying time3 - 4 h

Drying temperature (τ ≤ -30°C)100 - 120°C

Processing moisture0,04 - 0,02%

1Feed section60 - 80°C

2Temperature zone 1 - Zone 4250 - 275°C

3Nozzle temperature250 - 280°C

4Melt temperature260 - 275°C

5Mold temperature80 - 100°C

P NachHolding pressure, spec.300 - 800 bar

P StauBack pressure, spec.30 - 100 bar

Injection speedmedium to high

Screw speed8 - 15 m/min

Warning

Due to hydrolysis sensitivity of polyesters, a careful drying of the material before processing is very important. High residual moisture contents causes, in addition to surface defects, a decomposition of the molecular chains and thus reduced mechanical properties. If there are longer interruptions of the process, the cylinder temperature should be lowered. Furthermore, we recommend a thorough cleaning of the screw cylinder with extended dwell time or a material change. Glass-fiber-reinforced polyolefins (PE, PP) have established a particularly good cleaning effect.

  • Mechanical Properties
    Tensile modulus (1 mm/min | ISO 527-2)
    d.a.m.6000 MPa

    Stress at break (5 mm/min | ISO 527-2)
    d.a.m.110 MPa

    Strain at break (5 mm/min | ISO 527-2)
    d.a.m.3,5 %

    Flexural modulus (2 mm/min | ISO 178)
    d.a.m.5500 MPa

    Flexural strength (2 mm/min | ISO 178)
    d.a.m.175 MPa

    Charpy impact strength (23°C | ISO 179-1/1eU)
    d.a.m.40 kJ/m²

    Charpy notched impact strength (23°C | ISO 179-1/1eA)
    d.a.m.6,5 kJ/m²

  • Thermal Properties
    Temperature of deflection under load HDT/A (1,8 MPa | ISO 75)205 °C

    Melt temperature (DSC, 10K/min | DIN EN 11357-1)225 °C

  • Flammability
    Burning rate (UL 94)
    0,8mm Wall thicknessHB Class

    GWFI (IEC 60695-2-12)
    1,6mm Wall thickness725 °C

    Burning rate (<100 mm/min) (> 1 mm Thickness | FMVSS 302) +

  • General properties
    Density (23°C | ISO 1183)1,4 g/cm³

    Humidity absorption (70°C, 62% r.H. | ISO 1110)0,2 %

    Water absorption 23°C saturated (23°C, saturated | ISO 62)0,4 %

    Molding shrinkage (flow | ISO 294-4)0,5-0,7 %

    Molding shrinkage (transverse | ISO 294-4)0,9-1,1 %

  • Electrical Properties
    Volume resistivity (IEC 60093)
    d.a.m.>1,0E+13 Ohm x cm

    Surface resistivity (acc. to IEC 60093)
    d.a.m.1,0E+12 Ohm

    Comparative tracking index (Test liquid A | IEC 60112)300 V

  • Rheological Properties
    MVR (250°C/2,16kg | ISO 1133)14 cm³/10min

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.

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