Hytrel® HTR4275 BK316

Alternative and trade names
TPC-ET
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Description

Common features of Hytrel® thermoplastic polyester elastomer include mechanical and physical properties such as exceptional toughness and resilience, high resistance to creep, impact and flex fatigue, flexibility at low temperatures and good retention of properties at elevated temperatures. In addition, it resists many industrial chemicals, oils and solvents. Special grades include heat stabilised, flame retardant, food contact compliant, blow molding and extrusion grades. Concentrates offered include black pigments, UV protection additives, heat stabilisers, and flame retardants.Hytrel® thermoplastic polyester elastomer is plasticiser free.The good melt stability of Hytrel® thermoplastic polyester elastomer normally enables the recycling of properly handled production waste. If recycling is not possible, DuPont recommends, as the preferred option, incineration with energy recovery (-24 kJ/g of base polymer) in appropriately equipped installations.For disposal, local regulations have to be observed.Hytrel® thermoplastic polyester elastomer typically is used in demanding applications in the automotive, fluid power, electrical/electronic, consumer goods, appliance and power tool, sporting goods, furniture, industrial and off-road transportation/equipment industry.Hytrel® HTR4275 BK316 is designed for blow molding or processing techniques requiring high melt viscosity. It has nominal hardness of 55D, is pigmented black with fine particle size carbon black, and contains a general purpose stabilizer.Typical applications: Hollow thin wall parts requiring a tough polymer with excellent flexibility and temperature properties such as automotive boots.

This material data has been provided by Matmatch.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

PropertyTemperatureValueComment

Density

23.0 °C

1.17 g/cm³

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ISO 1183

Water absorption

23.0 °C

0.5 %

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Sim. to ISO 62 | Immersion 24h

Mechanical

PropertyTemperatureValueComment

Elastic modulus

23.0 °C

0.16 GPa

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ISO 527-1/-2

Elongation

23.0 °C

450 %

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ISO 527-1/-2

Flexural modulus

23.0 °C

0.16 GPa

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ISO 178

Hardness, Shore D

23.0 °C

55 [-]

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max., ISO 7619-1

Impact strength, Charpy notched

-40.0 °C

30 kJ/m²

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No Break @ 23°C, ISO 179/1eU

-6.0 °C

160 kJ/m²

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No Break @ 23°C, ISO 179/1eU

Poisson's ratio

23.0 °C

0.49 [-]

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Tear strength

23.0 °C

140 kN/m

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ISO 34-1

Tear strength, transverse

23.0 °C

100 kN/m

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ISO 34-1

Tensile strength

23.0 °C

37 MPa

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ISO 527-1/-2

Impact strength, Charpy unnotched

No Break @ 23°C, ISO 179/1eU

Thermal

PropertyTemperatureValueComment

Brittleness temperature

-100 °C

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ISO 974

Coefficient of thermal expansion

23.0 °C

1.8E-4 1/K

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ISO 11359-1/-2

Coefficient of thermal expansion, transverse

23.0 °C

1.8E-4 1/K

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ISO 11359-1/-2

Glass transition temperature

-30 °C

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ISO 11357-1/-2 | 18°F/min

Heat deflection temperature, 0.45 MPa

57 °C

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ISO 75-1/-2

Heat deflection temperature, 1.80 MPa

41 °C

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ISO 75-1/-2

Melting point

192 °C

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ISO 11357-1/-3 | 18°F/min

Specific heat capacity

23.0 °C

2100 J/(kg·K)

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of melt

Thermal diffusivity

23.0 °C

0 mm²/s

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Vicat softening temperature

170 °C

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ISO 306 | 90°F, 2 lbf

Flammability

Burning Behav. at 60mil nom. thickn.: HB class, Thickness tested: 1.5 mm, FMVSS Class: B -, Burning rate, Thickness 1 mm: 38 mm/min

Rheological Properties

PropertyTemperatureValueComment

Melt mass-flow rate

6 g/10min

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ISO 1133 | 230°C/10kg

Melt volume-flow rate

6 cm³/10min

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ISO 1133

Shrinkage

23.0 °C

1.7 %

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ISO 294-4, 2577

Shrinkage, transverse

23.0 °C

1.9 %

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ISO 294-4, 2577

Technological properties

Property
Fillers

Carbon Black

Processing methods

Drying Recommended: yes, Drying Temperature: 100°C, Drying Time, Dehumidified Dryer: 2-4h, Processing Moisture Content: ≤0.08%, 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