Technical datasheet

Hytrel® HTR8908 BK320

Supplied byCelanese- Last Updated on May 12, 2026

Hytrel® HTR8908 BK320 by Celanese is a flame retardant, halogen-, plasticizer-free thermoplastic polyester elastomer. It has soft hardness and is a heat stabilized colorable grade. It possesses excellent toughness, resilience, flexibility at low temperatures and good retention of properties at elevated temperatures.
  • Hytrel® HTR8908 BK320 is suitable for processing by injection molding, thermoforming, casting, film-, sheet- and other extrusion.
  • Provides high resistance to creep, impact and flex fatigue, industrial chemicals, oils and solvents.
  • It has good melt stability which enables the recycling of properly handled production waste.
  • Mostly used in wire & cable, automotive, fluid power, electrical/electronic, consumer goods, appliance, power tool, sporting goods, furniture, industrial and off-road transportation and equipment industry.
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Benefits

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Compliance

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Availability

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Hytrel® HTR8908 BK320 properties

Flammibility properties

PropertiesValue & unitTest conditionTest method
Burning Rate0.0 Visible After LoginVisible After LoginVisible After Login
Flame Rating, UL 940.0 Visible After LoginVisible After LoginVisible After Login
Flame Rating, UL 940.0 Visible After LoginVisible After LoginVisible After Login

Mechanical properties

PropertiesValue & unitTest conditionTest method
10% Modulus0.0 Visible After LoginVisible After LoginVisible After Login
5% Modulus0.0 Visible After LoginVisible After LoginVisible After Login
50% Modulus0.0 Visible After LoginVisible After LoginVisible After Login
Elongation at Break0.0 Visible After LoginVisible After LoginVisible After Login
Hardness, Shore A0.0 Visible After LoginVisible After LoginVisible After Login
Hardness, Shore A0.0 Visible After LoginVisible After LoginVisible After Login
Hardness, Shore D0.0 Visible After LoginVisible After LoginVisible After Login
Hardness, Shore D0.0 Visible After LoginVisible After LoginVisible After Login
Impact Strength, Notched Charpy0.0 Visible After LoginVisible After LoginVisible After Login
Impact Strength, Notched Charpy0.0 Visible After LoginVisible After LoginVisible After Login
Impact Strength, Notched Izod0.0 Visible After LoginVisible After LoginVisible After Login
Modulus of Elasticity0.0 Visible After LoginVisible After LoginVisible After Login
Tear Strength, MD0.0 Visible After LoginVisible After LoginVisible After Login
Tear Strength, TD0.0 Visible After LoginVisible After LoginVisible After Login
Tensile Strength at Break0.0 Visible After LoginVisible After LoginVisible After Login

Physical properties

PropertiesValue & unitTest conditionTest method
Density0.0 Visible After LoginVisible After LoginVisible After Login
Linear Mold Shrinkage, Flow0.0 Visible After LoginVisible After LoginVisible After Login
Linear Mold Shrinkage, Transverse0.0 Visible After LoginVisible After LoginVisible After Login
Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)0.0 Visible After LoginVisible After LoginVisible After Login

Thermal properties

PropertiesValue & unitTest conditionTest method
Brittleness Temperature0.0 Visible After LoginVisible After LoginVisible After Login
Deflection Temperature at 0.46 MPa (66 psi)0.0 Visible After LoginVisible After LoginVisible After Login
Glass Transition Temperature (Tg)0.0 Visible After LoginVisible After LoginVisible After Login
Melting Point0.0 Visible After LoginVisible After LoginVisible After Login
Melting Point0.0 Visible After LoginVisible After LoginVisible After Login
Vicat Softening Temperature0.0 Visible After LoginVisible After LoginVisible After Login

Hytrel® HTR8908 BK320 Processing Guidelines

Extrusion Processing Guidelines

PropertiesValue & unitTest conditionTest method
Drying TemperatureVisible After LoginVisible After Login
Drying Time, Dehumidified DryerVisible After LoginVisible After Login
Melt TemperatureVisible After LoginVisible After Login
Processing Moisture ContentVisible After LoginVisible After Login

Injection Molding Processing Guidelines

PropertiesValue & unitTest conditionTest method
Drying TemperatureVisible After LoginVisible After Login
Drying Time, Dehumidified dryerVisible After LoginVisible After Login
Melt TemperatureVisible After LoginVisible After Login
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