Hytrel® HTR8813 BK320

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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® HTR8813 BK320is a medium hardness halogen-free flame retarded thermoplastic elastomer with very good flammability performance. It can be processed by thermoplastic techniques such as injection molding and extrusion.

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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23.0 °C

1.23 g/cm³

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ISO 1183



Elastic modulus

23.0 °C

0.45 GPa

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ISO 527-1/-2


23.0 °C

150 %

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ISO 527-1/-2

Hardness, Shore D

23.0 °C

58 [-]

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max., ISO 7619-1

Impact strength, Charpy notched

-40.0 °C

1 kJ/m²

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ISO 179/1eA

-6.0 °C

2.5 kJ/m²

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ISO 179/1eA

Poisson's ratio

23.0 °C

0.47 [-]

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Tensile strength

23.0 °C

11 MPa

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ISO 527-1/-2



Glass transition temperature

-30 °C

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ISO 11357-1/-2 | 18°F/min

Melting point

200 °C

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ISO 11357-1/-3 | 18°F/min

Vicat softening temperature

163 °C

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ISO 306 | 90°F, 2 lbf


Burning Behav. at 60mil nom. thickn.: V-0 class, Thickness tested: 1.5 mm, UL recognition: yes -, Burning Behav. at thickness h: V-0 class, Thickness tested: 3 mm, UL recognition: yes -, Oxygen index: 49 %, Glow Wire Ignition Temperature, 80mil: 700 °C, FMVSS Class: B -, Burning rate, Thickness 1 mm: <80 mm/min



Dielectric strength

23.0 °C

17.5 kV/mm

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ASTM D 149 | Short Time, 3.2mm

Rheological Properties


Melt mass-flow rate

12 g/10min

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ISO 1133 | 220°C/2.16kg


23.0 °C

1.2 %

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ISO 294-4, 2577

Shrinkage, transverse

23.0 °C

1.2 %

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ISO 294-4, 2577

Technological properties

Processing methods

Drying Recommended: yes, Drying Temperature: 100°C, Drying Time, Dehumidified Dryer: 2-3h, Processing Moisture Content: ≤0.08%, Min. melt temperature: 220°C, Max. melt temperature: 240°C