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Hytrel® 8238

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Polymer Name: Thermoplastic Copolyester Elastomer (TPC-ET)
Processing Methods: Film Extrusion, Thermoforming, Casting, Injection Molding, Extrusion
End Uses: Cast Films, Gears, Hoses, Cosmetic Packaging, Appliances, Pipes, Cables, Automotive Applications, Corrugated Pipe, Connectors, Monofilaments, Cable Jacketing, Film, Sporting Goods, Thermoforming Applications, Wires, Tubing, Electrical/Electronic Applications, Office Automation Equipment
Density: 1280.0 kg/m³
Strain at Break: 300.0 %
Flexural Modulus: 1150.0 MPa
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Identification & Functionality

Hytrel® 8238 Features & Benefits

Applications & Uses

Properties

Mechanical Properties
ValueUnitsTest Method / Conditions
Tensile Modulus1200MPaISO 527-1/-2
Flexural Modulus1150MPaISO 178
Yield Stress38MPaISO 527-1/-2
Flexural Strength35MPaISO 178
Yield Strain19%ISO 527-1/-2
Poisson's Ratio0.44--
Stress (at 10% Strain)34MPaISO 527-1/-2
Stress (at 50% Strain)28MPaISO 527-1/-2
Stress (at 100% Strain)26MPaISO 527-1/-2
Stress (at Break)46MPaISO 527-1/-2
Nominal Strain (at Break)340%ISO 527-1/-2
Strain (at Break)min. 300%ISO 527-1/-2
Notched Charpy Impact Strength (at 23°C)10kJ/m²ISO 179/1eA
Notched Charpy Impact Strength (at -30°C)5kJ/m²ISO 179/1eA
Notched Charpy Impact Strength (at -40°C)5kJ/m²ISO 179/1eA
Tensile Notched Impact Strength (at 23°C)57kJ/m²ISO 8256/1
Notched Izod Impact Strength (at 23°C)11kJ/m²ISO 180/1A
Notched Izod Impact Strength (at -40°C)5.5kJ/m²ISO 180/1A
Hardness (Shore D, 15s)70-ISO 48-4 / ISO 868
Hardness (Shore D, Maximum)76-ISO 868
Tear Strength (Parallel)228kN/mISO 34-1
Tear Strength (Normal)212kN/mISO 34-1
Brittleness Temperature-84°CISO 974
Typical Properties
ValueUnitsTest Method / Conditions
Resin IdentificationTPC-ET-ISO 1043
Thermal Properties
ValueUnitsTest Method / Conditions
Specific Heat Capacity of Melt2150J/(kg K)-
Melt Temperature (at 10°C/min)221°CISO 11357-1/-3
Glass Transition Temperature (at 10°C/min)45°CISO 11357-1/-2
Temperature of Deflection Under Load (1.8 Mpa)45°CISO 75-1/-2
Temperature of Deflection Under Load (0.45 Mpa)105°CISO 75-1/-2
Vicat Softening Temperature (at 50°C/H 50N)150°CISO 306
Vicat Softening Temperature (at 50°C/H 10N)213°CISO 306
Coefficient of Linear Thermal Expansion (Parallel)150E-6/KISO 11359-1/-2
Coefficient of Linear Thermal Expansion (Normal)140E-6/KISO 11359-1/-2
Coefficient of Linear Thermal Expansion (Normal, at -40 to 23°C)100E-6/KISO 11359-1/-2
Coefficient of Linear Thermal Expansion (Parallel, at -40 to 23°C)90E-6/KISO 11359-1/-2
Relative Thermal Index (Electrical, 0.75mm)50°CUL 746B
Relative Thermal Index (Electrical, 1.5mm)90°CUL 746B
Relative Thermal Index (Electrical, 3mm)90°CUL 746B
Relative Thermal Index (Impact, 0.75mm)50°CUL 746B
Relative Thermal Index (Impact, 1.5mm)85°CUL 746B
Relative Thermal Index (Impact, 3mm)85°CUL 746B
Relative Thermal Index (Strength, 0.75mm)50°CUL 746B
Relative Thermal Index (Strength, 1.5mm)85°CUL 746B
Relative Thermal Index (Strength, 3mm)85°CUL 746B
TGA curveavailable-ISO 11359-1/-2
Effective Thermal Diffusivity5.44e-08m²/s-
Thermal Conductivity of Melt0.15W/(m K)ISO 22007-2
Electrical Properties
ValueUnitsTest Method / Conditions
Surface Resistivitymin. 1E15OhmIEC 62631-3-2
Electric Strength21kV/mmIEC 60243-1
Relative Permittivity (at 100Hz)4-IEC 62631-2-1
Relative Permittivity (at 1MHz)3.7-IEC 62631-2-1
Dissipation Factor (at 100 Hz)100E-4IEC 62631-2-1
Dissipation Factor (at 1 MHz)175E-4IEC 62631-2-1
Comparative Tracking Index600-IEC 60112
Volume Resistivitymin. 1E13Ohm.mIEC 62631-3-1
Flammability
ValueUnitsTest Method / Conditions
Oxygen Index22%ISO 4589-1/-2
FMVSS ClassSE-ISO 3795 (FMVSS 302)
Burning Behavior (at 1.5mm Nominal Thickness)UL94 HBclassIEC 60695-11-10
Burning Behavior (at 0.91mm Thickness)UL94 HBclassIEC 60695-11-10
Other Properties
ValueUnitsTest Method / Conditions
Humidity Absorption (at 2mm)0.2%Sim. to ISO 62
Water Absorption (at 2mm)0.6%Sim. to ISO 62
Water Absorption (Immersion 24h)0.3%Sim. to ISO 62
Density of Melt1130kg/m³-
Density1280kg/m³ISO 1183
Processing Information (Extrusion)
ValueUnitsTest Method / Conditions
Drying Time (Dehumidified Dryer)2 - 3h-
Processing Moisture Contentmax. 0.06%-
Melt Temperature Range235 - 250°C-
Drying Temperature100 - 120°C-
Processing Information (Injection Molding)
ValueUnitsTest Method / Conditions
Drying Temperature110°C-
Drying Recommendedyes--
Drying Time (Dehumidified Dryer)2 - 3h-
Processing Moisture Contentmax. 0.08%-
Hold Pressure Rangemax. 70MPa-
Melt Temperature (Optimum)250°C-
Melt Temperature (Minimum)245°C-
Melt Temperature (Maximum)260°C-
Mold Temperature (Optimum)45°C-
Mold Temperature (Minimum)45°C-
Mold Temperature (Maximum)55°C-
VDA Properties
ValueUnitsTest Method / Conditions
Emission of Organic Compounds550µgC/gVDA 277
Rheological Properties
ValueUnitsTest Method / Conditions
Melt Volume-Flow Rate (at 240°C, 2.16 kg)11.5cm³/10minISO 1133
Melt Mass Flow Rate (at 240°C, 2.16 kg)12.5g/10minISO 1133
Mold Shrinkage (Parallel)1.6%ISO 294-4, 2577
Mold Shrinkage (Normal)1.6%ISO 294-4, 2577
Chemical Resistance
Chemical Type Chemical Name Resistance
Acids Acetic Acid (5% by mass) (23°C) Probably Resistant
Acids Chromic Acid solution (40% by mass) (23°C) Not Recommended
Acids Citric Acid solution (10% by mass) (23°C) Probably Resistant
Acids Hydrochloric Acid (36% by mass) (23°C) Not Recommended
Acids Lactic Acid (10% by mass) (23°C) Probably Resistant
Acids Nitric Acid (40% by mass) (23°C) Not Recommended
Acids Sulfuric Acid (38% by mass) (23°C) Not Recommended
Acids Sulfuric Acid (5% by mass) (23°C) Probably Resistant
Alcohols Ethanol (23°C) Probably Resistant
Alcohols Isopropyl alcohol (23°C) Probably Resistant
Alcohols Methanol (23°C) Probably Resistant
Bases Ammonium Hydroxide solution (10% by mass) (23°C) Probably Resistant
Bases Sodium Hydroxide solution (1% by mass) (23°C) Probably Resistant
Bases Sodium Hydroxide solution (35% by mass) (23°C) Probably Resistant
Ethers Diethyl ether (23°C) Not Recommended
Hydrocarbons iso-Octane (23°C) Probably Resistant
Hydrocarbons n-Hexane (23°C) Probably Resistant
Hydrocarbons Toluene (23°C) Probably Resistant
Ketones Acetone (23°C) Not Recommended
Mineral oils Insulating Oil (23°C) Probably Resistant
Mineral oils SAE 10W40 multigrade motor oil (130°C) Not Recommended
Mineral oils SAE 10W40 multigrade motor oil (23°C) Probably Resistant
Mineral oils SAE 80/90 hypoid-gear oil (130°C) Not Recommended
Other 1% nonylphenoxy-polyethyleneoxy ethanol in water (23°C) Probably Resistant
Other 50% Oleic acid + 50% Olive Oil (23°C) Probably Resistant
Other DOT No. 4 Brake fluid (130°C) Not Recommended
Other Ethyl Acetate (23°C) Probably Resistant
Other Ethylene Glycol (50% by mass) in water (108°C) Not Recommended
Other Hydrogen peroxide (23°C) Not Recommended
Other Phenol solution (5% by mass) (23°C) Probably Resistant
Other Water (23°C) Probably Resistant
Other Water (90°C) Not Recommended
Salt solutions Sodium Carbonate solution (2% by mass) (23°C) Probably Resistant
Salt solutions Sodium Carbonate solution (20% by mass) (23°C) Probably Resistant
Salt solutions Sodium Chloride solution (10% by mass) (23°C) Probably Resistant
Salt solutions Sodium Hypochlorite solution (10% by mass) (23°C) Not Recommended
Salt solutions Zinc Chloride solution (50% by mass) (23°C) Probably Resistant
Standard Fuels Diesel fuel (pref. ISO 1817 Liquid F) (>90°C) Not Recommended
Standard Fuels Diesel fuel (pref. ISO 1817 Liquid F) (23°C) Probably Resistant
Standard Fuels Diesel fuel (pref. ISO 1817 Liquid F) (90°C) Probably Resistant
Standard Fuels ISO 1817 Liquid 1 - E5 (60°C) Not Recommended
Standard Fuels ISO 1817 Liquid 2 - M15E4 (60°C) Not Recommended
Standard Fuels ISO 1817 Liquid 3 - M3E7 (60°C) Not Recommended
Standard Fuels ISO 1817 Liquid 4 - M15 (60°C) Not Recommended
Standard Fuels Standard fuel with alcohol (pref. ISO 1817 Liquid 4) (23°C) Probably Resistant
Standard Fuels Standard fuel without alcohol (pref. ISO 1817 Liquid C) (23°C) Probably Resistant

Regulatory & Compliance

Certifications & Compliance
OEM Specifications
OEM Standards

Technical Details & Test Data

Viscosity vs Shear Rate

DuPont Hytrel 8238 Viscosity vs Shear Rate

Shear Stress vs Shear Rate

DuPont Hytrel 8238 Shear Stress vs Shear Rate

Dynamic Tensile Modulus vs Temperature

DuPont Hytrel 8238 Dynamic Tensile Modulus vs Temperature

Stress vs Strain

DuPont Hytrel 8238 Stress vs Strain

Stress vs Strain (TPE)

DuPont Hytrel 8238 Stress vs Strain (TPE)

Secant Modulus vs Strain

DuPont Hytrel 8238 Secant Modulus vs Strain

Packaging & Availability

Regional Availability