Technical datasheet

Hytrel® HTR4275 BK600

Supplied byCelanese- Last Updated on May 12, 2026

Hytrel® HTR4275 BK600 by Celanese is a plasticizer-free thermoplastic polyester elastomer. It is light- and heat stabilized. It is pigmented black and possesses excellent toughness, resilience, flexibility at low temperatures, high melt viscosity and good retention of properties at elevated temperatures
  • It provides high resistance to UV, creep, impact, flex fatigue, industrial chemicals, oils and solvents.
  • It exhibits good melt stability and enables the recycling of properly handled production waste.
  • It can be processed by injection-, blow molding, extrusion and thermoforming method.
  • Hytrel® HTR4275 BK600 is used in hollow thin wall parts requiring a tough polymer with excellent temperature properties such as automotive boots.
  • It is also used in fluid power, electrical/electronic, consumer goods, appliance and power tool, sporting goods, furniture, industrial and off-road transportation/equipment industry.
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Benefits

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Hytrel® HTR4275 BK600 properties

Mechanical properties

PropertiesValue & unitTest conditionTest method
10% Modulus0.0 Visible After LoginVisible After LoginVisible After Login
Elongation at Break0.0 Visible After LoginVisible After LoginVisible After Login
Elongation at Break, Nominal0.0 Visible After LoginVisible After LoginVisible After Login
Flexural Modulus0.0 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
Modulus of Elasticity0.0 Visible After LoginVisible After LoginVisible After Login
Poisson Ratio0.0 Visible After LoginVisible After LoginVisible After Login
Tensile Strength at Break0.0 Visible After LoginVisible After LoginVisible After Login

Other properties

PropertiesValue & unitTest conditionTest method
Tear Strength, MD0.0 Visible After LoginVisible After LoginVisible After Login
Tear Strength, TD0.0 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
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Linear Mold Shrinkage, Transverse0.0 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
Glass Transition Temperature (Tg)0.0 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® HTR4275 BK600 Processing Guidelines

Extrusion Processing Guidelines

PropertiesValue & unitTest conditionTest method
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