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This is the free Material Data Center Datasheet of IMPET® 2700 GV1/20 - PET-GF20 - Celanese

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Product Texts
Polyethylene terephthalate, 20 % glass fibre reinforced, high flowability, excellent gloss, high modulus

Flammability @1.6mm nom. thickn.HB-
Flammability at thickness h (0.8 mm)HB-
Processing/Physical CharacteristicsValueUnitTest Standard
ISO Data
Molding shrinkage, parallel 0.3 % ISO 294-4, 2577
Molding shrinkage, normal 0.9 % ISO 294-4, 2577
Mechanical propertiesValueUnitTest Standard
ISO Data
Tensile Modulus 8200 MPa ISO 527
Stress at break 133 MPa ISO 527
Strain at break 2 % ISO 527
Charpy impact strength, +23°C 20 kJ/m² ISO 179/1eU
Charpy impact strength, -30°C 20 kJ/m² ISO 179/1eU
Charpy notched impact strength, +23°C 6.8 kJ/m² ISO 179/1eA
Charpy notched impact strength, -30°C 6.6 kJ/m² ISO 179/1eA
Thermal propertiesValueUnitTest Standard
ISO Data
Melting temperature, 10°C/min 255 °C ISO 11357-1/-3
Glass transition temperature, 10°C/min 80 °C ISO 11357-1/-2
Temp. of deflection under load, 1.80 MPa 233 °C ISO 75-1/-2
Temp. of deflection under load, 0.45 MPa 248 °C ISO 75-1/-2
Vicat softening temperature, B 250 °C ISO 306
Coeff. of linear therm. expansion, parallel 23 E-6/K ISO 11359-1/-2
Coeff. of linear therm. expansion, normal 95 E-6/K ISO 11359-1/-2
Burning Behav. at 1.5 mm nom. thickn. HB class IEC 60695-11-10
Thickness tested 1.6 mm -
Burning Behav. at thickness h HB class IEC 60695-11-10
Thickness tested 0.8 mm -
Oxygen index 24 % ISO 4589-1/-2
Electrical propertiesValueUnitTest Standard
ISO Data
Relative permittivity, 100Hz 4.6 - IEC 62631-2-1
Relative permittivity, 1MHz 4.1 - IEC 62631-2-1
Dissipation factor, 100Hz 30 E-4 IEC 62631-2-1
Dissipation factor, 1MHz 190 E-4 IEC 62631-2-1
Volume resistivity >1E13 Ohm*m IEC 62631-3-1
Surface resistivity 1E14 Ohm IEC 62631-3-2
Electric strength 31 kV/mm IEC 60243-1
Other propertiesValueUnitTest Standard
Water absorption 0.45 % Sim. to ISO 62
Humidity absorption 0.2 % Sim. to ISO 62
Density 1520 kg/m³ ISO 1183
Material specific propertiesValueUnitTest Standard
ISO Data
Viscosity number 70 cm³/g ISO 307, 1157, 1628
Diagrams
Stress-strain , IMPET® 2700 GV1/20, PET-GF20, Celanese
Secant modulus-strain , IMPET® 2700 GV1/20, PET-GF20, Celanese
Characteristics
Processing
Injection Molding
Delivery form
Pellets
Additives
Release agent
Special Characteristics
Heat stabilized or stable to heat
Features
High Gloss
Regional Availability
Europe
Other text information
Injection molding
To avoid hydrolytic degradation during processing, IMPET resins have to be dried to a moisture level equal to or less than 0,01%. The drying should be done in a dry-air dryer (dew point < -30°C) with a temperature of 120 to 140 °C and a drying time of 2 to 4 hours. In case of longer residence times in the dry-air dryer, the temperature should be reduced to 100°C.
The time between drying and processing should be kept as short as possible. The processing machine feed hopper should be closed during the processing operation.

Melt Temperature 270-290 °C
Mold Temperature 135-145 °C
Maximum Barrel Residence Time *) 5-10 min
Injection Speed fast
Peripheral screw speed max.0,3 m/sec
Back Pressure 10-20 bar
Injection Pressure 600-900 bar
Holding Pressure 300-500 bar
Nozzle Design open design preferred

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.

Ticona recommends only externally heated hot runner systems.

*) If the cylinder temperatures are higher than the recommended maximum temperatures, the max. residence time in the barrel has to be reduced.
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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