Hytrel® 4556

About
45 Shore D High Performance Polyester Elastomer&&

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

Technical Data
PHYSICALNominal valueUnitTest method
Density1.14g/cm³ISO 1183
Melt Flow Rate
220℃,2.16kg8.5g/10minISO 1133
Melt Volume Rate
220℃,2.16 kg7.50cm³/10minISO 1133
Shrinkage rate ISO 294-4
TD1.1%ISO 294-4
MD1.1%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℃,24hr0.60%ISO 62

MECHANICALNominal valueUnitTest method
Shore hardness ISO 868
Shaw’s D45 ISO 868
Shore D, 15 seconds42 ISO 868
Tensile modulus85.0MPaISO 527-2
tensile strength ISO 527-2
fracture34.0MPaISO 527-2
10% strain5.70MPaISO 527-2
50% strain9.80MPaISO 527-2
100% strain11.0MPaISO 527-2
300% strain17.0MPaISO 527-2
Tensile strain
fracture> 300%ISO 527-2
Nominal tensile fracture strain740%ISO 527-2
Bending modulus87.0MPaISO 178
abrasion resistance130mm³ISO 4649

filmNominal valueUnitTest method
Water vapor transmittance
23℃,85% RH,25 µm600g/m²/24 hrDIS 15106-1/-2

elastic bodyNominal valueUnitTest method
tear strength ISO 34-1
TD120kN/mISO 34-1
MD120kN/mISO 34-1

IMPACTNominal valueUnitTest method
Charpy Notched Impact Strength ISO 179/1eA
-40℃No Break ISO 179/1eA
-30℃No Break ISO 179/1eA
23℃No Break ISO 179/1eA
Charpy Unnotch Impact strength ISO 179/1eU
-30℃No Break ISO 179/1eU
23℃No Break ISO 179/1eU
Impact strength of cantilever beam notch ISO 180/1A
-40℃No Break ISO 180/1A
23℃No Break ISO 180/1A

THERMALNominal valueUnitTest method
Hot deformation temperature
1.8 MPa, unannealed35.0ISO 75-2/A
0.45 MPa, unannealed50.0ISO 75-2/B
Embrittlement temperature-100ISO 974
Glass transition temperature-45.0ISO 11357-2
Vicat Softening Temp 
A50155ISO 306/A50
B5060.0ISO 306
Melting temperature193ISO 11357-3
Linear coefficient of thermal expansion
TD ISO 11359-2
MD ISO 11359-2
1.7E-4cm/cm/℃ISO 11359-2
-40 to 23 ℃2.2E-4cm/cm/℃ISO 11359-2
1.9E-4cm/cm/℃ISO 11359-2
-40 to 23 ℃2.1E-4cm/cm/℃ISO 11359-2
Effective Thermal Diffusivity5.44E-8m²/s

Electrical performanceNominal valueUnitTest method
Surface resistivity4.0E+14ohmsIEC 60093
Volume resistivity8.0E+12ohms·cmIEC 60093
Dielectric strength19kV/mmIEC 60243-1
Relative permittivity IEC 60250
100 Hz4.80 IEC 60250
1 MHz4.50 IEC 60250
Dissipation factor IEC 60250
100 Hz9.5E-3 IEC 60250
1 MHz0.030 IEC 60250
Compared to the leakage tracing index600VIEC 60112

FLAME CHARACTERISTICSNominal valueUnitTest method
Burning rate
1 mm< 100mm/minISO 3795
Flame retardant level UL 94
1.50 mmHB UL 94
3.00 mmHB UL 94
Flammability level IEC 60695-11-10, -20
1.5 mmHB IEC 60695-11-10, -20
3.0 mmHB IEC 60695-11-10, -20
Extreme oxygen index20%ISO 4589-2
FMVSS flame retardant ratingB FMVSS 302

Process Conditions
injectionNominal valueUnitTest method
ExtrusionNominal valueUnitTest method
Drying temperature100°C
Drying time – hot air dryer2.0 to 3.0hr
Recommended maximum moisture content0.080%
Processing (melt) temperature220 to 250°C
Melt Temperature, Optimum225°C
Mold temperature45 to 55°C
Mold Temperature, Optimum45°C
Drying Recommendedyes 
Drying temperature90 to 110°C
Drying time2.0 to 3.0hr
Recommended maximum moisture content0.060%
Melt temperature210 to 225°C
Extrusion Melt Temperature, Optimum215°C

Notes
1. Typical properties: these are not to be construed as specifications.
2. 10°C/min
3. FMVSS 302
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