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Arnitel® UM551

Technical Datasheet | Supplied by DSM
Arnitel® UM551 is a high-performance thermoplastic co-polyester (TPC) gradeby DSM. It is an impact modified, heat-, light- and UV stabilized grade. It is suitable for processing by film extrusion and injection molding. Possesses flexibility, strength, excellent processing characteristics, excellent mechanical properties, excellent elasticity, good resistance in heat ageing tests and permeability to water vapor. Shows high temperature-, thermal-, UV-, fungus- and fatigue resistance. Offers chemical resistance against household chemicals like cleaning agents, sunscreen lotion and automotive greases and oils. Arnitel® UM551 can withstand very high burst pressures and retains its properties better at higher temperatures than PA12. Used in auto electronics & electricals, furniture. Meets ISO 18064 for TPC-ES.
Product Type
  • Polyester TPE > COPE
  • Polyester [Polyester] > > Co-polyester
Physical Form
Pellets
Product Status
COMMERCIAL
Geographical Availability
Central and Eastern Europe, Western Europe
Applications/ Recommended for
  • Automotive
  • Furnitures
  • Injection molding - thermoplastics
  • Extrusion
Labels/Agency Rating
ISO 18064 TPC-ES
Key Features
  • Chemical resistance, Good
  • Elasticity, High
  • Fatigue Resistant
  • Flexibility, Good
  • Heat Aging Resistance, Good
  • Heat stabilized
  • Impact modified
  • Light Stabilized
  • Processability, Good
  • Strength, Good
  • UV Resistance, Good
  • Heat Resistance, High
  • Thermal Stability, Good
  • Fungus Resistance
  • UV-Stabilized

Arnitel® UM551 Properties

Physical Properties

Value & Unit
Test Condition
Test Method
Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)
14 g/10 min
(At 230°C, 2.16 kg)
ISO 1133
Water Absorption
0.6 %
( )
ISO 62
Humidity Absorption
0.25 %
( )
ISO 62

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