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Arnitel® UM551-V

Technical Datasheet | Supplied by DSM
Arnitel® UM551-V by DSM is a high-performance, halogen and phosphorous-free, flame retarded, thermoplastic co-polyester (TPC-ES). It is suitable for processing by extrusion and injection molding. It possesses excellent flexibility, strength, processing characteristics, mechanical properties, elasticity, good resistance in heat aging tests and permeability to water vapor. It shows high temperature-, chemical-, thermal-, UV-, fungus– and fatigue resistance. It is designed for use by automotive OEMs. Arnitel® UM551-V can withstand very high burst pressures and retains its properties better at higher temperatures than PA12.
Product Type
  • Polyester TPE > COPE
  • Polyester [Polyester] > > Co-polyester
Physical Form
Product Status

Arnitel® UM551-V Properties

Physical Properties

Value & Unit
Test Condition
Test Method
Water Absorption
0.6 %
( )
ISO 62
Humidity Absorption
0.25 %
( )
ISO 62
Linear Mold Shrinkage
1.35 %
( )
ISO 294-4

Arnitel® UM551-V Processing Guidelines

Injection Molding Properties

Value & Unit
Test Condition
Test Method
Moisture Content
< 0.05 %
Drying Time
3 - 4 hr
Drying Temperature
100 °C
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