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

Material Data Center offers the following functions for VANDAR® 2500:
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Processing/Physical Characteristics - Mechanical properties - Thermal properties - Other properties
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Processing/Physical CharacteristicsValueUnitTest Standard
ISO Data
Molding shrinkage, parallel 1.9 % ISO 294-4, 2577
Molding shrinkage, normal 1.9 % ISO 294-4, 2577
Mechanical propertiesValueUnitTest Standard
ISO Data
Tensile Modulus 1450 MPa ISO 527
Yield stress 35 MPa ISO 527
Yield strain 5 % ISO 527
Nominal strain at break >50 % ISO 527
Charpy impact strength, +23°C 203 kJ/m² ISO 179/1eU
Charpy impact strength, -30°C 168 kJ/m² ISO 179/1eU
Charpy notched impact strength, +23°C 88 kJ/m² ISO 179/1eA
Charpy notched impact strength, -30°C 9 kJ/m² ISO 179/1eA
Thermal propertiesValueUnitTest Standard
ISO Data
Melting temperature, 10°C/min 225 °C ISO 11357-1/-3
Glass transition temperature, 10°C/min 70 °C ISO 11357-1/-2
Temp. of deflection under load, 1.80 MPa 50 °C ISO 75-1/-2
Temp. of deflection under load, 0.45 MPa 125 °C ISO 75-1/-2
Coeff. of linear therm. expansion, parallel 130 E-6/K ISO 11359-1/-2
Coeff. of linear therm. expansion, normal 134 E-6/K ISO 11359-1/-2
Other propertiesValueUnitTest Standard
Water absorption 0.45 % Sim. to ISO 62
Density 1250 kg/m³ ISO 1183
Characteristics
Processing
Injection Molding
Delivery form
Pellets
Additives
Lubricants
Regional Availability
North America, Europe, Asia Pacific, South and Central America, Near East/Africa
Other text information
Injection molding
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.
Disclaimer
Copyright Altair Engineering GmbH. Altair Engineering GmbH assumes no liability for the system to be free of errors. The user takes sole responsibility for the use of this data under the exclusion of every liability from Altair Engineering GmbH; this is especially valid for claims of compensation resulting from consequential damages. Altair explicitly points out that any decision about the application of materials must be double checked with the producer of this material. This includes all contents of this system. Copyright laws are applicable for the content of this system.
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