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Hytrel® 7246

Sold by DuPont
Polymer Name: Thermoplastic Copolyester Elastomer (TPC-ET)
Processing Methods: Thermoforming, Extrusion, Film Extrusion, Casting, Injection Molding
End Uses: Hoses, SRS Pretensioner, Automotive Safety Retractor, Cable Jacketing, SRS Airbag, SRS Actuator, Sporting Goods, Wires, Electrical/Electronic Applications, Office Automation Equipment, Automotive Safety, Cast Films, Cosmetic Packaging, Appliances, Pipes, Cables, Automotive Applications, Corrugated Pipe, SRS Adjuster, SRS Seatbelt, Connectors, Monofilaments, Film, Safety Restrain System, EV Charger, Automotive Safety Pushbutton, Thermoforming Applications, Tubing, SRS Pillar Loop, Safety Equipment, Signal Cord
Density: 1260.0 kg/m³
Strain at Break: 300.0 %
Flexural Modulus: 550.0 MPa
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Identification & Functionality

Hytrel® 7246 Features & Benefits

Applications & Uses

Properties

Mechanical Properties
ValueUnitsTest Method / Conditions
Tensile Modulus550MPaISO 527-1/-2
Flexural Modulus550MPaISO 178
Yield Stress27MPaISO 527-1/-2
Shear Modulus280MPaISO 6721
Yield Strain23%ISO 527-1/-2
Poisson's Ratio0.47--
Abrasion Resistance100mm³ISO 4649
Stress (at 5% Strain)14MPaISO 527-1/-2
Stress (at 10% Strain)23MPaISO 527-1/-2
Stress (at 50% Strain)24MPaISO 527-1/-2
Stress (at Break)50MPaISO 527-1/-2
Nominal Strain (at Break)530%ISO 527-1/-2
Strain (at Break)min. 300%ISO 527-1/-2
Tensile Creep Modulus (1h)360MPaISO 899-1
Tensile Creep Modulus (1000h)310MPaISO 899-1
Notched Charpy Impact Strength (at 23°C)36kJ/m²ISO 179/1eA
Notched Charpy Impact Strength (at -30°C)8kJ/m²ISO 179/1eA
Notched Charpy Impact Strength (at -40°C)7kJ/m²ISO 179/1eA
Tensile Notched Impact Strength (at 23°C)300kJ/m²ISO 8256/1
Notched Izod Impact Strength (at 23°C)38kJ/m²ISO 180/1A
Notched Izod Impact Strength (at -40°C)7kJ/m²ISO 180/1A
Hardness (Shore D, 15s)64-ISO 48-4 / ISO 868
Hardness (Shore D, Maximum)68-ISO 868
Tear Strength (Parallel)182kN/mISO 34-1
Tear Strength (Normal)172kN/mISO 34-1
Brittleness Temperature-97°CISO 974
Typical Properties
ValueUnitsTest Method / Conditions
Resin IdentificationTPC-ET-ISO 1043
ISO DesignationISO 20029-TPC-ET,,GLN,70-22-075--
Thermal Properties
ValueUnitsTest Method / Conditions
Specific Heat Capacity of Melt2150J/(kg K)-
Melt Temperature (at 10°C/min)218°CISO 11357-1/-3
Glass Transition Temperature (at 10°C/min)25°CISO 11357-1/-2
Temperature of Deflection Under Load (1.8 Mpa)50°CISO 75-1/-2
Temperature of Deflection Under Load (0.45 Mpa)100°CISO 75-1/-2
Vicat Softening Temperature (at 50°C/H 50N)140°CISO 306
Vicat Softening Temperature (at 50°C/H 10N)205°CISO 306
Coefficient of Linear Thermal Expansion (Parallel)180E-6/KISO 11359-1/-2
Coefficient of Linear Thermal Expansion (Normal)170E-6/KISO 11359-1/-2
Coefficient of Linear Thermal Expansion (Normal, at -40 to 23°C)130E-6/KISO 11359-1/-2
Coefficient of Linear Thermal Expansion (Parallel, at -40 to 23°C)120E-6/KISO 11359-1/-2
Relative Thermal Index (Electrical, 1.5mm)85°CUL 746B
Relative Thermal Index (Impact, 1.5mm)85°CUL 746B
Relative Thermal Index (Strength, 1.5mm)75°CUL 746B
Thermal Conductivity of Melt0.15W/(m K)ISO 22007-2
Effective Thermal Diffusivity8.0e-08m²/s-
Electrical Properties
ValueUnitsTest Method / Conditions
Surface Resistivitymin. 1E15OhmIEC 62631-3-2
Electric Strength20kV/mmIEC 60243-1
Relative Permittivity (at 100Hz)4-IEC 62631-2-1
Relative Permittivity (at 1MHz)3.5-IEC 62631-2-1
Dissipation Factor (at 100 Hz)160E-4IEC 62631-2-1
Dissipation Factor (at 1 MHz)300E-4IEC 62631-2-1
Comparative Tracking Index600-IEC 60112
Volume Resistivity20000000000Ohm.mIEC 62631-3-1
Flammability
ValueUnitsTest Method / Conditions
Oxygen Index23%ISO 4589-1/-2
FMVSS ClassSE/B-ISO 3795 (FMVSS 302)
Burning Behavior (at 1.5mm Nominal 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 Melt1110kg/m³-
Density1260kg/m³ISO 1183
Processing Information (Extrusion)
ValueUnitsTest Method / Conditions
Melt Temperature Range225 - 245°C-
Melt Temperature (Optimum)235°C-
Drying Time (Dehumidified Dryer)2 - 3h-
Drying Temperature100 - 120°C-
Processing Moisture Contentmax. 0.06%-
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)245°C-
Melt Temperature (Minimum)240°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 Compounds300µgC/gVDA 277
Light Stability (Delta L)-3-DIN 53236
Light Stability (Delta A)-0.1-DIN 53236
Light Stability (Delta B)15-DIN 53236
Light Stability (Delta E)16-DIN 53236
Rheological Properties
ValueUnitsTest Method / Conditions
Melt Volume-Flow Rate (at 240°C, 2.16 kg)12cm³/10minISO 1133
Melt Mass Flow Rate (at 240°C, 2.16 kg)13g/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 Automatic hypoid-gear oil Shell Donax TX (135°C) Not Recommended
Mineral oils Insulating Oil (23°C) Probably Resistant
Mineral oils Motor oil OS206 304 Ref.Eng.Oil, ISP (135°C) Not Recommended
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 Coolant Glysantin G48, 1:1 in water (125°C) Not Recommended
Other DOT No. 4 Brake fluid (120°C) Not Recommended
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

Technical Details & Test Data

Viscosity vs Shear Rate

DuPont Hytrel 7246 Viscosity vs Shear Rate

Shear Stress vs Shear Rate

DuPont Hytrel 7246 Shear Stress vs Shear Rate

Dynamic Tensile Modulus vs Temperature

DuPont Hytrel 7246 Dynamic Tensile Modulus vs Temperature

Dynamic Shear Modulus vs Temperature

DuPont Hytrel 7246 Dynamic Shear Modulus vs Temperature

Stress vs Strain

DuPont Hytrel 7246 Stress vs Strain

Stress vs Strain (TPE)

DuPont Hytrel 7246 Stress vs Strain (TPE)

Secant Modulus vs Strain

DuPont Hytrel 7246 Secant Modulus vs Strain

Stress vs Strain (Isochronous, 23°C)

DuPont Hytrel 7246 Stress vs Strain (Isochronous, 23°C)

Creep Modulus vs Time (23°C)

DuPont Hytrel 7246 Creep Modulus vs Time (23°C)

Stress vs Strain (Isochronous, 40°C)

DuPont Hytrel 7246 Stress vs Strain (Isochronous, 40°C)

Creep Modulus vs Time (40°C)

DuPont Hytrel 7246 Creep Modulus vs Time (40°C)

Stress vs Strain (Isochronous, 80°C)

DuPont Hytrel 7246 Stress vs Strain (Isochronous, 80°C)

Creep Modulus vs Time (80°C)

DuPont Hytrel 7246 Creep Modulus vs Time (80°C)

LTHA Stress at Break (2mm)

DuPont Hytrel 7246 LTHA Stress at Break (2mm)

LTHA Strain at Break (2mm)

DuPont Hytrel 7246 LTHA Strain at Break (2mm)

Packaging & Availability

Regional Availability