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This is the free Material Data Center Datasheet of VANDAR® 2500 - PBT - Celanese

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Caractéristiques des transformations/physiques - Propriétés mécaniques - Propriétés thermiques - Propriétés diverses
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Caractéristiques des transformations/physiquesValeurUnitéNorme du test
ISO Data
Retrait au moulage, parallèle 1.9 % ISO 294-4, 2577
Retrait au moulage, perpendiculaire 1.9 % ISO 294-4, 2577
Propriétés mécaniquesValeurUnitéNorme du test
ISO Data
Module en traction 1450 MPa ISO 527
Contrainte d'écoulement 35 MPa ISO 527
Déformation au seuil d'écoulement 5 % ISO 527
Déformation nominale à la rupture >50 % ISO 527
Résistance au choc Charpy, +23°C 203 kJ/m² ISO 179/1eU
Résistance au choc Charpy, -30°C 168 kJ/m² ISO 179/1eU
Résistance au choc Charpy (entaillé), +23°C 88 kJ/m² ISO 179/1eA
Résistance au choc Charpy (entaillé), -30°C 9 kJ/m² ISO 179/1eA
Propriétés thermiquesValeurUnitéNorme du test
ISO Data
Température de fusion, 10°C/min 225 °C ISO 11357-1/-3
Température de transition vitreuse, 10°C/min 70 °C ISO 11357-1/-2
Température de fléchissement s/chrg, 1.80 MPa 50 °C ISO 75-1/-2
Température de fléchissement s/chrg, 0.45 MPa 125 °C ISO 75-1/-2
Coeffic. de dilatation therm. linéique, parallèle 130 E-6/K ISO 11359-1/-2
Coeffic. de dilatation therm. linéique, perpend. 134 E-6/K ISO 11359-1/-2
Propriétés diversesValeurUnitéNorme du test
Absorption d'eau 0.45 % Sim. to ISO 62
Masse volumique 1250 kg/m³ ISO 1183
Caractéristiques
Transformation
Moulage par injection
Conditionnement
Granulés
Additifs
Lubrifiant
Disponibilité régionale
Amérique du nord, Europe, Asia Pacific, South and Central America, Proche-Orient/Afrique
Autres informations
Moulages par injection
To avoid hydrolytic degradation during processing, Vandar resins have to be dried to a moisture level equal to or less than 0.02%. Drying should be done in a dehumidifying hopper dryer capable of dewpoints <-30°F (-34°C) at 250°F (121°C) for 4 hours.
Rear Temperature 450-480(230-250) deg F (deg C)
Center Temperature 460-490(235-255) deg F (deg C)
Front Temperature 470-500(240-260) deg F (deg C)
Nozzle Temperature 470-510(240-265) deg F (deg C)
Melt Temperature 470-510(240-265) deg F (deg C)
Mold Temperature 100-200(40-95 deg F (deg C)
Back Pressure 0-50 psi
Screw Speed Moderate
Injection Speed Fast

Injection speed, injection pressure and holding pressure have to be optimized to the individual article geometry. To avoid material degradation during processing low back pressure and minimum screw speed have to be used. Overheating of the material has to be avoided, in particular for flame retardant grades. Up to 25% clean and dry regrind may be used.
Conditions générales
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