PBT – Polybutyleneterephthalate PBT GF20+M10
PRECITE® P3 GFM 20/10 natural (7627)PRECITE® P3 GFM 20/10 natural (7627) is a 20% glass fibre reinforced and 10% mineral filled polybutylene terephthalate (PBT) with good surface. Due to its low moisture absorption, this material has very good dimensional stability. It is particularly suitable for precision parts in the automotive, E&E or appliances industry.
Properties
Tensile Modulus Tensile Strength Impact StrengthFeatures
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Mechanical Properties
Tensile modulus (1 mm/min | ISO 527-2) d.a.m. 9300 MPa
Stress at break (5 mm/min | ISO 527-2) d.a.m. 115 MPa
Strain at break (5 mm/min | ISO 527-2) d.a.m. 2,6 %
Charpy impact strength (23°C | ISO 179-1/1eU) d.a.m. 50 kJ/m²
Charpy notched impact strength (23°C | ISO 179-1/1eA) d.a.m. 7 kJ/m²
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Thermal Properties
Melting temperature (DSC, 10K/min | DIN EN ISO 11357-3) 225 °C
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Flammability
Burning rate (UL 94) 0,8mm Wall thickness HB Class
Burning rate (<100 mm/min) (> 1 mm Thickness | FMVSS 302) +
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General properties
Density (23°C | ISO 1183) 1,53 g/cm³
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Rheological Properties
MVR (250°C/2,16kg | ISO 1133) 10 cm³/10min
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 | 3 - 4 h |
| Drying temperature (τ ≤ -30°C) | 100 - 120°C | |
| Processing moisture | 0,02 - 0,04% | |
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Feed section | 60 - 80°C |
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Temperature zone 1 - Zone 4 | 250 - 275°C |
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Nozzle temperature | 250 - 280°C |
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Melt temperature | 260 - 275°C |
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Mold temperature | 80 - 100°C |
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Holding pressure, spec. | 300 - 800 bar |
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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.
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.
