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Preliminary datasheet

PBT – Polybutyleneterephthalate PBT GF 30

PRECITE® P3 GF 30 natural (6850)

PRECITE® P3 GF 30 natural (6850) is a 30% glass fibre reinforced, medium viscous polybutylene terephthalate (PBT) with high 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.


6 Drying time 3 - 4 h

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

Processing moisture 0,04 - 0,02%

1 Feed section 60 - 80°C

2 Temperature zone 1 - Zone 4 250 - 275°C

3 Nozzle temperature 250 - 280°C

4 Melt temperature 260 - 275°C

5 Mold temperature 80 - 100°C

P Nach Holding pressure, spec. 300 - 800 bar

P Stau Back pressure, spec. 30 - 100 bar

Injection speed medium to high

Screw speed 8 - 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. 10000 MPa

    Stress at break (5 mm/min | ISO 527-2)
    d.a.m. 145 MPa

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

    Flexural modulus (2 mm/min | ISO 178)
    d.a.m. 10500 MPa

    Flexural strength (2 mm/min | ISO 178)
    d.a.m. 230 MPa

    Charpy impact strength (23°C | ISO 179-1/1eU)
    d.a.m. 65 kJ/m²

    Charpy notched impact strength (23°C | ISO 179-1/1eA)
    d.a.m. 11 kJ/m²

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

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

  • General properties
    Density (23°C | ISO 1183) 1,53 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) 0,3 %

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

  • 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) 400 V

  • Rheological Properties
    MVR (250°C/2,16kg | ISO 1133) 9 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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