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Plastics & Elastomers
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Arnite® TM4 440

Technical Datasheet | Supplied by DSM
Arnite® TM4 440 by DSM is a lubricated polybutylene terephthalate and polyethylene terephthalate alloy (PBT + PET) reinforced with 20% mineral fiber. It is suitable for processing by injection molding. Offers durability, excellent dimensional stability, high thermal and oxidative stability, good color-stability, high stiffness, good wear resistance, low coefficient of friction and low moisture absorption. Provides high crystallinity to ensure rapid cooling times, outstanding creep properties and excellent dielectric strength at elevated temperatures. Arnite® TM4 440 shows resistance against heat, aliphatic hydrocarbons, motor vehicle fuels, oils and greases, dilute acids and bases, detergents and salt solutions. Used in automotive applications. Meets ISO 1043 for PBT.
Product Type
Polyester > PBT + PET
Product Status
Geographical Availability
Central and Eastern Europe, Western Europe
Applications/ Recommended for
  • Automotive
  • Injection molding - thermoplastics
Labels/Agency Rating
ISO 1043 (PBT+PET)
Key Features
  • Oil Resistant
  • Crystalinity, High
  • Color stability, Good
  • Creep Resistance, Good
  • Friction, Low
  • Moisture Absorption, Low
  • Heat Resistance, High
  • Durable
  • Hydrocarbon Resistant
  • Acid Resistant
  • Base Resistant
  • Grease Resistant
  • Dimensional stability, Good
  • Fuel Resistant
  • Lubricated
  • Stiffness, High
  • Filled, Mineral

Arnite® TM4 440 Properties

Physical Properties

Value & Unit
Test Condition
Test Method
Humidity Absorption
0.15 %
( )
ISO 62
1480 kg/m³
( )
ISO 1183
Melt-Volume Flow Rate
34 cm³/10min
(At 270°C, 2.16 kg)
ISO 1133

Arnite® TM4 440 Processing Guidelines

Injection Molding Properties

Value & Unit
Test Condition
Test Method
Mold Temperature
60 - 100 °C
Center Temperature
230 - 250 °C
Moisture Content
0.02 %

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