Hytrel® HTR8341C BK320
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Hytrel® HTR8341C BK320 is designed for blow molding or processing techniques requiring high melt viscosity. It has nominal hardness of 40D, is pigmented black with fine particle size carbon black, and contains a general purpose stabilizer. It shows excellent mechanical properties at elevated temperatures, superior fatigue, abrasion, and grease resistance.
Polymer Name: Thermoplastic Copolyester Elastomer (TPC-ET)
Processing Methods: Film Extrusion, Thermoforming, Blow Molding, Casting, Injection Molding, Sheet, Plaques & Profiles Extrusion, Coating
End Uses: Bellows, Cosmetic Packaging, Automotive Applications, Constant Velocity Joint Boots, Containers, Bottles, Automotive Boots, Automotive Drivetrain, Film, Thermoforming Applications, Tubing, Automotive Bellows
Density: 1140.0 kg/m³
Strain at Break: 300.0 %
Flexural Modulus: 80.0 MPa
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Identification & Functionality
Chemical Family
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Hytrel® HTR8341C BK320 Features & Benefits
Applications & Uses
Markets
Applications
Plastics & Elastomers Processing Methods
Properties
Chemical Resistance
Color
Automotive Specifications
Part Marking Code
Resin ID
Mechanical Properties
| Value | Units | Test Method / Conditions | |
| Tensile Modulus | 80 | MPa | ISO 527 |
| Flexural Modulus | 80 | MPa | ASTM D790 (ISO 178) |
| Charpy Impact Strength (23°C) | No Break | kJ/m2 | ISO 179/1eU |
| Charpy Impact Strength (-30°C) | No Break | kJ/m2 | ISO 179/1eU |
| Charpy Notched Impact Strength (23°C) | No Break | kJ/m2 | ISO 179/1eA |
| Charpy Notched Impact Strength (-40°C) | N1 | kJ/m² | ISO 179/1eA |
| Tensile Notched Impact Strength (23°C) | 300 | kJ/m² | ISO 8256/1 |
| Izod Notched Impact Strength (23°C) | No Break | kJ/m2 | ISO 180/1A |
| Poisson's Ratio | 0.49 | - | - |
| Coefficient of Static Friction (Against Steel) | 0.2 | - | ASTM 1894 |
| Brittleness Temperature | -100 | °C | ISO 974 |
Physical Properties
| Value | Units | Test Method / Conditions | |
| Melt Mass Flow Rate - MFR (230°C/10 kg) | 0.9 | g/10min | ISO 1133 |
| Molding Shrinkage - Parallel | 1.6 | % | ISO 294-4, 2577 |
| Molding Shrinkage - Normal | 1.5 | % | ISO 294-4, 2577 |
Thermal Properties
| Value | Units | Test Method / Conditions | |
| Melting Temperature (10°C/min) | 207 | °C | ISO 11357-1/-3 |
| Glass Transition Temperature (10°C/min) | -401 | °C | ISO 11357-1/-2 |
| Freezing Temperature (10°C/min) | 167 | °C | ISO 11357-1/-2 |
| Temperature of Deflection Under Load(1.8 MPa) | 42 | °C | ISO 75-1/-2 |
| Temperature of Deflection Under Load (0.45 MPa) | 56 | °C | ISO 75-1/-2 |
| Vicat Softening Temperature (50°C/h, 10N) | 158 | °C | ISO 306 |
| Coefficient of Linear Thermal Expansion - Parallel | 170 | E-6/K | ISO 11359-1/-2 |
| Coefficient of Linear Thermal Expansion - Normal | 200 | E-6/K | ISO 11359-1/-2 |
| Coefficient of Linear Thermal Expansion - Normal (-40 - 23°C) | 240 | E-6/K | ISO 11359-1/-2 |
| Coefficient of Linear Thermal Expansion - Parallel (-40 - 23°C) | 230 | E-6/K | ISO 11359-1/-2 |
| Specific Heat Capacity of Melt | 2100 | J/(kg K) | - |
| Effective Thermal Diffusivity | 5.44E-8 | m²/s | - |
| Thermal Conductivity of Melt | 0.16 | W/(m K) | - |
Mechanical Properties Elastomers
| Value | Units | Test Method / Conditions | |
| Hardness (15s) | 37 | Shore D | ISO 7619-1 |
| Hardness | max. 40 | Shore D | ISO 7619-1 |
| Tear Strength - Parallel | 110 | kN/m | ISO 34-1 |
| Stress at 50% Strain | 12 | MPa | ISO 527-1/-2 |
| Stress at 10% Strain | 7 | MPa | ISO 527-1/-2 |
| Stress at 300% Strain | 23 | MPa | ISO 527-1/-2 |
| Tear Strength - Normal | 115 | kN/m | ISO 34-1 |
| Nominal Strain at Break | 350 | % | ISO 527-1/-2 |
| Stress at Break | 28 | MPa | ISO 527-1/-2 |
| Stress at 100% Strain | 13 | MPa | ISO 527-1/-2 |
| Strain at Break | min. 300 | % | ISO 527-1/-2 |
Electrical Properties
| Value | Units | Test Method / Conditions | |
| Dissipation Factor (100 Hz) | 300 | E-4 | IEC 62631-2-1 |
| Dissipation Factor (1 MHz) | 95 | E-4 | IEC 62631-2-1 |
| Surface Resistivity | 4.00E+14 | ohm | IEC 62631-3-2 |
| Electric Strength | 19 | kV/mm | IEC 60243-1 |
| Comparative Tracking Index - CTI | 600 | V | UL 746 |
| Volume Resistivity | 8E10 | ohm.m | IEC 62631-3-1 |
Flammability
| Value | Units | Test Method / Conditions | |
| FMVSS Class | B | - | ISO 3795 (FMVSS 302) |
| Burning Rate (1 mm, Thickness) | 17 | mm/min | ISO 3795 (FMVSS 302) |
Other Properties
| Value | Units | Test Method / Conditions | |
| Humidity Absorption (2 mm) | 0.2 | % | Sim. to ISO 62 |
| Water Absorption (2 mm) | 0.5 | % | Sim. to ISO 62 |
| Density | 1140 | kg/m³ | ISO 1183 |
| Density of Melt | 990 | kg/m³ | - |
Processing Information (Injection Molding)
| Value | Units | Test Method / Conditions | |
| Drying Temperature | 100 | °C | - |
| Drying Recommended | Yes | - | - |
| Processing Moisture Content | ≤0.08 | % | - |
| Drying Time (Dehumidified Dryer) | 3.0 - 4.0 | h | - |
| Melt Temperature Optimum | 240 | °C | - |
| Min. Melt Temperature | 230 | °C | - |
| Max. Melt Temperature | 250 | °C | - |
| Mold Temperature Optimum | 45 | °C | - |
| Min. Mold Temperature | 40 | °C | - |
| Max. Mold Temperature | 50 | °C | - |
| Ejection Temperature | 145 | °C | - |
Processing Information (Blow Molding)
| Value | Units | Test Method / Conditions | |
| Processing Moisture Content | ≤0.02 | % | - |
| Drying Temperature | ≤110 | °C | - |
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
OEM Specifications
OEM Standards
Technical Details & Test Data
Viscosity vs Shear Rate
Shear Stress vs Shear Rate
Dynamic Tensile Modulus vs Temperature
Stress vs Strain (TPE)
Specific Volume Temperature (pvT)
Tensile Modulus vs Temperature
LTHA Stress at Break (2mm)
LTHA Strain at Break (2mm)
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Hytrel® HTR8341C BK320
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