Hytrel® 8238

About
82 Shore D Standard Performance Polyester Elastomer&&

Product Description
SupplierDuPont
GenericTPC-ET
Material StatusCommercial: Active
FeaturesHB
AvailabilitysAfrica & Middle East ,North America,Latin America,Asia Pacific,Europe
Process MethodsProfile extrusion

Technical Data
MECHANICALNominal valueUnitTest method
Shore hardness ISO 868
Shaw’s D76 ISO 868
Shore D, 15 seconds70 ISO 868
Tensile modulus1200MPaISO 527-2
tensile strength ISO 527-2
fracture46.0MPaISO 527-2
yield38.0MPaISO 527-2
10% strain34.0MPaISO 527-2
50% strain28.0MPaISO 527-2
100% strain26.0MPaISO 527-2
Tensile strain
fracture> 300%ISO 527-2
yield19%ISO 527-2
Nominal tensile fracture strain340%ISO 527-2
Bending modulus1150MPaISO 178

elastic bodyNominal valueUnitTest method
tear strength ISO 34-1
TD210kN/mISO 34-1
MD230kN/mISO 34-1

IMPACTNominal valueUnitTest method
Charpy Notched Impact Strength ISO 179/1eA
-40℃5.0kJ/m²ISO 179/1eA
-30℃5.0kJ/m²ISO 179/1eA
23℃15kJ/m²ISO 179/1eA
Impact strength of cantilever beam notch ISO 180/1A
-40℃5.5kJ/m²ISO 180-1A
23℃11kJ/m²ISO 180-1A
Tensile impact strength
23℃57.0kJ/m²ISO 8256/1

THERMALNominal valueUnitTest method
Hot deformation temperature
1.8 MPa, unannealed45.0ISO 75-2/A
0.45 MPa, unannealed105ISO 75-2/B
Embrittlement temperature-84.0ISO 974
Glass transition temperature50.0ISO 11357-2
Vicat Softening Temp 
A50213ISO 306/A50
B50150ISO 306
Melting temperature221ISO 11357-3
Linear coefficient of thermal expansion
TD ISO 11359-2
MD ISO 11359-2
1.5E-4cm/cm/℃ISO 11359-2
-40 to 23 ℃9.0E-5cm/cm/℃ISO 11359-2
1.4E-4cm/cm/℃ISO 11359-2
-40 to 23 ℃1.0E-4cm/cm/℃ISO 11359-2
Effective Thermal Diffusivity5.44E-8m²/s

Electrical performanceNominal valueUnitTest method
Surface resistivity> 1.0E+15ohmsIEC 60093
Volume resistivity> 1.0E+15ohms·cmIEC 60093
Dielectric strength21kV/mmIEC 60243-1
Relative permittivity IEC 60250
100 Hz4.00 IEC 60250
1 MHz3.70 IEC 60250
Dissipation factor IEC 60250
100 Hz0.010 IEC 60250
1 MHz0.018 IEC 60250
Compared to the leakage tracing index600VIEC 60112

FLAME CHARACTERISTICSNominal valueUnitTest method
Flame retardant level UL 94
0.90 mmHB UL 94
1.50 mmHB UL 94
Flammability level IEC 60695-11-10, -20
0.9 mmHB IEC 60695-11-10, -20
1.5 mmHB IEC 60695-11-10, -20
Extreme oxygen index22%ISO 4589-2
FMVSS flame retardant ratingSE FMVSS 302

Supplementary informationNominal valueUnitTest method
Emissions of organic compounds550µgC/gVDA 277

PHYSICALNominal valueUnitTest method
Density1.28g/cm³ISO 1183
Melt Flow Rate
240℃,2.16kg13g/10minISO 1133
Melt Volume Rate
240℃,2.16 kg11.5cm³/10minISO 1133
Shrinkage rate ISO 294-4
TD1.6%ISO 294-4
MD1.6%ISO 294-4
Water absorption rate
Saturation, 23 ℃, 2.00 mm0.60%ISO 62
Equilibrium, 23 ℃, 50% RH, 2.00 mm0.20%ISO 62
23℃,24hr0.30%ISO 62
Melt density1.13g/cm³
Specific Heat Capacity of Melt2150J/kg/℃
Thermal Conductivity of Melt0.15W/m/K

Process Conditions
injectionNominal valueUnitTest method
ExtrusionNominal valueUnitTest method
Drying temperature110°C
Drying time – hot air dryer2.0 to 3.0hr
Recommended maximum moisture content0.080%
Processing (melt) temperature245 to 260°C
Melt Temperature, Optimum250°C
Mold temperature45 to 55°C
Mold Temperature, Optimum45°C
Hold pressure70.0MPa
Drying Recommendedyes 
Drying temperature100 to 120°C

Notes
1. Typical properties: these are not to be construed as specifications.
2. 10°C/min
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