VESTODUR® GF50

About
Evonik manufactures a range of polybutylene terephthalate compounds that are supplied under the registered trademark VESTODUR®. Material properties characterizing VESTODUR® compounds are: high thermostability high stiffness low water absorption resulting in high dimensional stability high hardness good strength good sliding friction behavior, low abrasion good creep behavior good electrical properties good chemical resistance good weathering resistance good processability no tendency to form stress cracks&&

Product Description
SupplierEvonik
Genericpolybutylene terephthalate
Material StatusCommercial: Active
FeaturesGood Rigidity,Weather resistance is good,Excellent Processability,Good flexibility,Good Dimensional Stability,Good Electrical Properties,Low or no water absorption,Good Hardness,Good wear resistance,Solvent resistance,Low moisture absorption,Heat Stabilized,HB
AvailabilitysNorth America
Process MethodsInjection Molding

Technical Data
PHYSICALNominal valueUnitTest method
Density1.71g/cm³ISO 1183
Melt Volume Rate
250℃,2.16 kg8.00cm³/10minISO 1133
Shrinkage rate ISO 294-4
TD1.4%ISO 294-4
MD0.15%ISO 294-4
Water absorption rate
Saturation, 23 ℃0.40%ISO 62

IMPACTNominal valueUnitTest method
Charpy Notched Impact Strength ISO 179/1eA
-30 ℃, completely fractured12kJ/m²ISO 179/1eA
23 ℃, completely fractured13kJ/m²ISO 179/1eA
Charpy Unnotch Impact strength ISO 179/1eU
-30 ℃, completely fractured65kJ/m²ISO 179/1eU
23 ℃, completely fractured60kJ/m²ISO 179/1eU

THERMALNominal valueUnitTest method
Hot deformation temperature 
0.45 MPa, unannealed223ISO 75-2/B
1.8 MPa, unannealed215ISO 75-2/A
Vicat Softening Temp 
220ISO 306/A
215ISO 306/B
Melting temperature221 to 226ISO 11357-3
Linear coefficient of thermal expansion ISO 11359-2
MD:23~55℃4.0E-51/℃ISO 11359-2
TD:23~55℃4.0E-51/℃ISO 11359-2

Electrical performanceNominal valueUnitTest method
Surface resistivity1.0E+13ohmsIEC 60093
Volume resistivity
23℃1.0E+15ohms·cmIEC 60093
Dielectric strength
1 mm in oil27kV/mmIEC 60243-1
Relative permittivity IEC 60250
23℃,100 Hz4.50 IEC 60250
23℃,1 MHz4.90 IEC 60250
Dissipation factor IEC 60250
23℃,100 Hz4.0E-3 IEC 60250
23℃,1 MHz0.015 IEC 60250
Compared to the leakage tracing index IEC 60112
CTI500VIEC 60112
Solution A525VIEC 60112

FLAME CHARACTERISTICSNominal valueUnitTest method

Supplementary informationNominal valueUnitTest method
Electrolytic corrosionA1 step IEC 60426

MECHANICALNominal valueUnitTest method
Shore hardness
Shaw’s D85 ISO 868
Ball hardness230MPaISO 2039-1
Tensile modulus15000MPaISO 527-2
tensile strength180MPaISO 527-2/50
Tensile strain
fracture1.8%ISO 527-2/50

Notes
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